KR20070043411A - Apparatus for leak detection of welding part automatically - Google Patents

Abstract

Disclosed is a leak inspection apparatus capable of detecting gas leakage of a weld bead line while automatically traveling along the weld bead line. Leak test apparatus according to the present invention, the casing; A driving unit for moving the casing along the welding bead line (WBL); A suction unit provided in the casing and configured to detect a gas leak in the welding bead line WBL; A traveling sensor for detecting a welding bead line WBL; And a control unit controlling the driving unit according to the signal detected from the traveling sensor.

Gas, Welding, Leakage, Auto, Inspection, Welding Bead Line

Description

Leakage Inspection Device {APPARATUS FOR LEAK DETECTION OF WELDING PART AUTOMATICALLY}

1 is an exploded perspective view schematically showing a leak inspection apparatus according to an embodiment of the present invention,

2 is a perspective view of the combination of FIG.

3 is a control block diagram of the leak test apparatus shown in FIG.

4 is a plan view showing the upper surface of the leak test apparatus shown in FIG.

Figure 5 is a bottom view schematically showing the bottom surface of the leak test apparatus shown in FIG.

Figure 6 is a side view schematically showing a drive wheel unit of the leak test apparatus shown in FIG.

7 is an exploded perspective view schematically illustrating the inhaler unit of FIG. 1;

8 is a perspective view schematically showing the inhaler shown in FIG.

9 is a view for explaining the connection structure of the connecting rod and the rotating shaft of the crimping unit shown in FIG.

10 is a side view for explaining the structure of the pressing unit shown in FIG.

11 is a view for explaining the operation of the driving sensor shown in FIG.

12 is a flat view showing a state in which the leak test apparatus shown in FIG. 1 is installed on a base material BM,

13a and 13b are views for explaining the operation of the pressing unit shown in FIG.

<Description of the symbols for the main parts of the drawings>

100; Casing 200; Drive unit

210; Drive motors 220 and 230; First and second drive wheel unit

222, 232; First and second drive wheels 224 and 234; First and second drive wheel casing

240; Power transmission unit 242; Front Worm Wheel

244; Rear worm wheel 246a; Anterior worm

246b; Rear worm 300; Suction unit

310; Arm 320; Inhaler unit

322; Inhaler 340; Support unit

350; Inhaler wheel 360; Suction motor

370; Gas detector 400; Driving sensor

410; Detection needle 420; Signal generator

500; A pressing unit 510; Operation lever

520; Connecting rod 530; Elastic member

600; Control unit WBL; Weld Bead Line

BM; Base material

The present invention relates to a leak inspection apparatus for detecting the leakage of the airtight container welds, such as the liquefied natural gas (Liquefied Natural Gas, hereinafter referred to as 'LNG') storage tank and transport tank is essential.

Airtight containers, such as storage tanks for liquefied natural gas, require airtightness. And most large airtight containers are manufactured by welding a steel plate and a membrane (Membrane). Therefore, the airtightness test of the welded part of the airtight container must be performed.

There are various nondestructive testing methods for the airtightness test. Inspection methods for injecting gas into a double hermetic container and for detecting gas leakage outside the hermetic container are commonly used to test the airtightness of large hermetic containers.

The general leak inspection apparatus for detecting the gas leakage of the hermetic container includes a suction hose connected to the suction motor, and a gas detector for analyzing the gas sucked from the suction hose. In the leak test apparatus having the above-described configuration, the inspector directly inspects the gas leak from the weld bead line while moving the suction hose along the weld bead line (WBL).

By performing the leak test manually as described above, the moving speed of the suction hose is not constant and the distance between the welding bead line and the suction hole of the suction hose is not kept constant, so the precision and reliability of the leak detection are poor. In addition, only one weld bead line can be inspected at a time, thereby delaying the inspection time.

The present invention has been made in view of the above, and an object thereof is to provide a leak inspection apparatus capable of improving the precision and reliability of a leak inspection.

Another object of the present invention is to provide a leak inspection device that can automatically check the leakage while moving along the welding bead line.

Still another object of the present invention is to provide a leak inspection apparatus capable of inspecting a plurality of weld bead lines in one run.

Leakage test apparatus according to the present invention for achieving the above object, the casing; A driving unit for moving the casing along the welding bead line (WBL); A suction unit provided in the casing and configured to detect a gas leak from a welding bead line WBL; A traveling sensor for detecting a welding bead line WBL; And a control unit controlling the driving unit according to the signal detected from the traveling sensor.

According to one embodiment of the invention, the drive unit, a drive motor; A first driving wheel unit disposed on one side of the driving motor in a direction crossing the driving shaft and rotatably supported by the driving shaft of the driving motor; A second driving wheel unit disposed on the other side of the driving motor in a direction crossing the driving shaft and rotatably supported by the driving shaft of the driving motor; And a power transmission unit for transmitting power of the driving motor to the first and second driving wheel units. A cover for preventing damage to the base material (BM, see FIG. 13A) is provided below each of the first and second driving wheel units. In addition, the leak inspection apparatus, the compression unit for rotating the first and second driving wheel units about the drive shaft of the drive motor so as to approach and spaced apart; includes.

On the other hand, the first drive wheel unit, the first drive wheel casing rotatably supported on the drive shaft of the drive motor; And a first driving wheel rotatably supported by the first driving wheel casing, wherein the second driving wheel unit includes: a second driving wheel casing rotatably supported by a drive shaft of the driving motor; And a second driving wheel rotatably supported by the second driving wheel casing. The first driving wheel includes a first front wheel and a first rear wheel supported by the first driving wheel casing to be spaced apart a predetermined distance in the direction of the drive shaft of the drive motor, wherein the second driving wheel is the drive shaft of the drive motor And a second front wheel and a second rear wheel supported by the second driving wheel casing to be spaced apart by a predetermined distance in the direction. And the rotation axis of each said wheel is inclined by the predetermined angle (theta) with respect to the line perpendicular to the advancing direction of the said casing so that the said casing may advance to the base material BM (refer FIG. 13A).

The power transmission unit includes: a first front worm wheel and a first rear worm wheel connected to respective axes of the first front wheel and the first rear wheel; A second front worm wheel and a second rear worm wheel connected to the respective axes of the second front wheel and the second rear wheel; A front worm gear-coupled with the first front worm wheel and the second front worm wheel and provided on a drive shaft of the drive motor; And a rear worm gear-coupled with the first rear worm wheel and the second rear worm wheel and provided on a driving shaft of the driving motor.

The pressing unit may include an elastic member installed between the first and second driving wheel casings to press the first and second driving wheel casings in a spaced apart direction; An operating lever rotatably supported by the first driving wheel casing; And a connecting rod mounted on the first driving wheel casing so as to move in a direction crossing the driving shaft of the driving motor, the connecting rod moving the first and second driving wheels in a direction in close proximity to the rotation of the operation lever. It includes.

The suction unit, the casing is installed in the direction crossing the direction of travel of the casing, the flexible arm; A plurality of inhaler units spaced apart from each other to be movable on the arm; A suction motor for generating a suction force to the inhaler unit; And a gas detector for analyzing the gas sucked through the inhaler unit.

The inhaler unit, the support unit is installed to be movable along the arm; And an inhaler detachably mounted to the support unit. The support unit may include a sliding member installed to be movable on the arm; A support installed on the sliding member to be movable up and down; And a first buffer member interposed between the support and the sliding member. The support unit, the holder is installed on the support and the inhaler; A second buffer member interposed between the holder and the support; And an inhaler wheel for movably supporting the support. On the other hand, the inhaler is formed with a groove into which the welding bead is inserted, and each of the grooves is provided with a plurality of suction holes arranged up and down.

Hereinafter, a leak inspection apparatus according to an embodiment of the present invention will be described in detail.

1 to 4, a leak inspection apparatus according to an exemplary embodiment of the present invention may include a casing 100 forming an appearance of a leak inspection apparatus and a welding bead line WBL of FIG. 12. ) To move along the drive unit 200, the suction unit 300 for detecting the gas leaked from the weld bead line (WBL, see FIG. 12), for detecting the weld bead line (WBL, see FIG. 12) According to the signal transmitted from the traveling sensor 400, the pressing unit 500 for pressing the driving unit 200 to the welding bead line (WBL, see FIG. 12) and the traveling sensor 400, the driving unit 200 The control unit 600 for controlling).

The casing 100 includes side plates 112 and 114 and a top plate 120. The side plates 112 and 114 include a first side plate 112 attached to one side of the drive unit 200 and a second side plate 114 attached to the other side of the drive unit 200. The upper plate 120 is provided with a connecting plate 122 extending forward, the connection plate 122 is supported by the suction unit 300.

The drive unit 200 includes a drive motor 210, a power transmission unit 240, and first and second drive wheel units 220 and 230.

The driving motor 210 is connected in signal communication with the control unit 600, the ON / OFF is controlled according to the signal transmitted from the control unit 600. The drive shaft 212 of the drive motor 210 extends forward by a predetermined length.

As shown in FIGS. 1 and 4, the power transmission unit 240 includes a front worm 246a and a rear worm 246b spaced apart from each other by a predetermined distance in the axial direction on the drive shaft 212 of the drive motor 210. And a front worm wheel 242 and a rear worm wheel 244 geared to each of the front worm 246a and the rear worm 246b. The front worm wheel 242 includes first and second front worm wheels 242a and 242b coupled to both sides of the drive shaft 212 in a direction crossing the axial direction. The rear worm wheel 244 includes first and second rear worm wheels 244a and 244b coupled to both sides of the driving shaft 212 in a direction crossing the axial direction. In this embodiment, the worm and the worm wheel as an example of the power transmission unit 240, in addition to various power transmission means such as belts and pulleys can be used.

4 to 6, the first driving wheel unit 220 is rotatably coupled to the drive shaft 212 so as to be disposed at one side of the drive shaft 212 in a direction crossing the axial direction. The second driving wheel unit 230 is rotatably coupled to the drive shaft 212 so as to be disposed on the other side in the direction intersecting the axial direction of the drive shaft 212. The first and second driving wheel units 220 and 230 have the same shape as those of the first and second driving wheel units 220 and 230. Each of the first and second driving wheel units 220 and 230 includes first and second driving wheels 222 and 232 and first and second driving wheel casings 224 and 234. Same in. Hereinafter, a detailed structure of each of the first and second driving wheel units 220 and 230 will be described.

The first driving wheel unit 220 includes a first driving wheel 222 and a first driving wheel casing 224 rotatably supported by the first driving wheel 222.

The first driving wheel 222 includes a first front wheel 222a and a first rear wheel 222b provided to be spaced apart by a predetermined interval in the axial direction of the drive shaft 212. Each of the first front wheel 222a and the first rear wheel 222b is connected to one end of each of the first front wheel shaft 223a and the first rear wheel shaft 223b, and the first front wheel shaft 223a. ) And the other end of each of the first rear wheel shaft 223b are connected to each of the first front worm wheel 242a and the first rear worm wheel 244a.

The first driving wheel casing 224 may include a first front wheel casing 224a in which the first front wheel 222a is rotatably supported, and a first rear wheel 222b in a rotatable manner. One rear wheel casing 224b is included.

As described above, the second driving wheel unit 230 is coupled to the driving shaft 212 in the same structure as the first driving wheel unit 220. Hereinafter, the second driving wheel unit 230 will be described in detail.

The second driving wheel unit 230 includes a second driving wheel 232 and a second driving wheel casing 234 rotatably supported by the second driving wheel 232.

The second driving wheel 232 includes a second front wheel 232a and a second rear wheel 232b provided to be spaced apart by a predetermined distance in the axial direction of the drive shaft 212. Each of the second front wheel 232a and the second rear wheel 232b is connected to one end of each of the second front wheel shaft 233a and the second rear wheel shaft 233b, and the second front wheel shaft 233a. ) And the other end of each of the second rear wheel shafts 233b are connected to the second front worm wheel 242b and the second rear worm wheel 244b, respectively.

The second driving wheel casing 234 may include a second front wheel casing 234a on which the second front wheel 232a is rotatably supported, and a second rear wheel 232b on which the second rear wheel 232b is rotatably supported. 2 rear wheel casing 234b.

The first front wheel casing 224a and the first rear wheel casing 224b are connected to the first side plate 112, and the second front wheel casing 234a and the second rear wheel casing 234b. Is connected to the second side plate 114.

Meanwhile, as shown in FIGS. 1 and 6, a driving plate 250 is provided below each of the first and second driving wheel units 220 and 230, and the driving plate 250 is leak-tested. A Teflon cover 252 is attached to prevent the substrate BM (see FIG. 13A) from being scratched and damaged while the device is being driven.

In addition, the axes 223a, 223b, 233a, and 233b of the driving wheels each have a predetermined angle θ from a line PMB perpendicular to the traveling direction MD of the leak inspection apparatus. ) Inclined. With this inclined structure, the leak inspection apparatus moves along the welding bead line (WBL) (see FIG. 12) and proceeds to the base material (BM (see FIG. 13A)) without being separated from the welding bead line (WBL, FIG. 12). It can be moved.

As shown in FIG. 2, the suction unit 300 includes an arm 310, an inhaler unit 320, a suction motor 360, and a gas detector 370.

The arm 310 is provided at the front end of the connecting plate 122, and intersects with the axial direction AX of the drive shaft 212, that is, in a direction crossing the traveling direction MD of the leak inspection apparatus. Is placed. The arm 310 is preferably stretchable in length by a pipe-like structure connected in multiple stages.

A plurality of the inhaler unit 320 is installed on the arm 310 to be spaced apart by a predetermined interval, each inhaler unit 320 is positioned in accordance with the distance between the plurality of welding bead line (WBL, see Fig. 12) It is installed on the arm 310 to be movable along the arm 310 to be adjusted. In the present embodiment, but illustrated that the inhaler unit 320 is composed of three, the number may be changed according to the number of welding bead line (WBL, see FIG. 12). Since each of the inhaler units 320 has the same structure, only the structure of one inhaler unit 320 will be described below.

As shown in FIG. 7, the inhaler unit 320 includes a support unit 340 movably installed along the arm 310 and an inhaler 322 detachably installed on the support unit 340. It includes.

The support unit 340 includes a sliding member 342, a support 345, a first buffer member 347, an inhaler wheel 350, a holder 349, and a second buffer member 348.

A sliding groove 343 is formed in the sliding member 342, and the arm 310 is inserted into the sliding groove 343. In this structure, the sliding member 342 is movable along the arm 310. The sliding member 342 is also provided with a guide groove 344 which is vertically penetrated to allow the support 345 to move up and down.

The support 345 is provided with a guide pin 346 inserted into the guide groove 344, even if the support 345 is subjected to various vibrations from the surface of the base material (BM, see FIG. 13A), the support 345, As the guide pin 346 moves along the guide groove 344, only the vertical movement is performed.

The first buffer member 347 is inserted into the guide pin 346, one end of which is supported by the support 345 and the other end of which is supported by the sliding member 342. Therefore, even when the support 345 is impacted from the surface of the base material (BM, see FIG. 13A), the impact of the vertical direction is reduced by the first buffer member 347 and transmitted to the driving unit 200 and the inhaler 322. Is prevented.

The inhaler wheel 350 is in contact with the surface of the base material BM (see FIG. 13A) to support the inhaler unit 320. The inhaler wheel 350 is rotatably supported by the support 345, the material is preferably a material having an elastic force, such as elastic rubber.

The holder 349 is provided in front of the support 345, and the inhaler 322 is detachably installed.

The second buffer member 348 is installed between the holder 349 and the support 345, one end of which is installed on the support 345 and the other end of which is installed on the holder 349. And a spring 348b inserted into the support bar 348a. The support bar 348a is preferably made of a resilient material. By installing the second buffer member 348 between the inhaler 322 and the support 345, it is possible to buffer the shock in all directions generated from the base material (BM, see FIG. 13A) inhaler 322 The shock can be prevented from being transmitted. By preventing the shock transmitted to the inhaler 322, the inhaler 322 and the welding bead line (WBL, see Fig. 12) can be maintained at a constant interval, thereby improving the sensitivity of gas leakage detection.

The suction motor 360 is to form a negative pressure in the inhaler 322 and is connected to the connection hose 330 or the like to communicate with the inhaler 322.

The gas detector 370 is a device for analyzing the gas sucked from the inhaler 322. The gas detector 370 is generally installed in one device with the suction motor 360. The gas detector 370 may output an alarm to the display unit (not shown) such as a monitor (not shown) by sounding an alarm or transmitting the alarm to the control unit 600 when leakage gas is detected. Since the gas detector 370 is already known and commercially available, a detailed description of the operation and structure will be omitted.

As shown in FIG. 8, the inhaler 322 has an insertion groove 324 into which a welding bead line is inserted. Three suction holes 328 disposed up and down are formed in each of both surfaces 326a and 326b of the insertion groove 324. The suction hole 328 is connected to the connection hose 330 for communicating the inhaler 322 and the suction motor 360 by the suction passage provided in the inhaler 322. Each connection hose 330 connected to each inhaler 322 is connected to the suction motor 360 and the gas detector 370 through the collector 332.

The traveling sensor 400 is provided in the first front wheel casing 224a and includes a detection needle 410 and a signal generator 420 for generating a signal according to whether the detection needle 410 is operated. . The detection needle 410 extends forward from the first front wheel casing 224a to detect the front of the inhaler 322. The signal generator 420 is connected in signal communication with the controller 600 to transmit a signal according to the operation of the detection needle 410 to the controller 600. When the detection needle 410 has a weld bead line WBL (see FIG. 12), the detection needle 410 is in the same state as the solid line of FIG. 11, and when the detection needle 410 reaches a portion without the weld bead line WBL (see FIG. 12), FIG. It becomes the same state as the dotted line of 11. In the same state as the dotted line of FIG. 11, the signal generator 420 transmits a signal to the controller 600 that there is no welding bead line (WBL, see FIG. 12), and when such a signal is transmitted, The control unit 600 stops the driving unit 200. In the present exemplary embodiment, the traveling sensor 400 using the detection needle 410 is illustrated, but various sensors for detecting the welding bead line (WBL, see FIG. 12), such as an ultrasonic sensor or a laser sensor, may be used.

5, 9, and 10, the pressing unit 500 includes an operation lever 510 rotatably installed on the first side plate 112 and both ends of the operation lever 510. And a connecting rod 520 rotatably installed on an axis eccentric from its center, and an elastic member 530 inserted into the connecting rod 520.

The operation lever 510 includes a rotation shaft 512 and a handle portion 516 connected to the rotation shaft 512. The rotation shaft 512 is inserted into two hinge parts 513 provided to be spaced apart from the first side plate 112 by a predetermined distance. Both ends of the rotating shaft 512 are provided with an eccentric shaft 514 (see FIG. 9) which forms an eccentricity from the center of the rotating shaft 512. The handle part 516 is for operating the operation lever 510 and is installed on the rotation shaft 512 by a method such as welding.

The connecting rod 520 is composed of two, one end of each of the two connecting rod 520 is rotatably connected to the eccentric shaft 514 provided on each of both ends of the rotation shaft 512 of the operating lever 510. Therefore, when the operation lever 510 is rotated about the rotation axis 512, the connecting rod 520 is a linear movement. The other end of the connecting rod 520 is fixed to each of the second front wheel casing 234a and the second rear wheel casing 234b through the first side plate 112.

The elastic member 530 is inserted into the connecting rod 520, one end of which is supported by the first side plate 112, and the other end of which the second front wheel casing 234a and the second rear wheel casing ( 234b). The elastic member 530 is in a state in which the first side plate 112 and the second driving wheel unit 230 are pressed in a direction away from each other. That is, the elastic member 530 is in a state in which the elastically pressing the first driving wheel unit 220 and the second driving wheel unit 230 is installed in the first side plate 112 in a direction away from do.

Looking at the operation of the crimping unit 500 having the structure as described above, first, when the user rotates the handle portion 516 upward, the rotating shaft 512 is rotated. When the rotation shaft 512 rotates, the connecting rod 520 rotatably installed on the eccentric shaft 514 is pulled in the direction of the rotation shaft 512. At this time, the other end of the connecting rod 520 pulls the second driving wheel unit 230. Accordingly, the second driving wheel unit 230 rotates in a direction close to the first driving wheel unit 220 about the driving shaft 212 of the driving motor 210. Therefore, the first driving wheel 222 and the second driving wheel 232 are in contact with each other. At this time, a welding bead line WBL (see FIG. 12) is present between the first driving wheel 222 and the second driving wheel 232, so that the first and second driving wheels 222 and 232 are present. ) Is fixed to the welding bead line (WBL, see Figure 12) by pressing the welding bead line (WBL, see Figure 12).

On the contrary, when the handle part 516 is rotated downward, the connecting rod 520 linearly moves in the opposite direction as described above. At this time, the elastic member 530 presses the first side plate 112 and the second driving wheel unit 230 so that the first driving wheel unit 220 and the second driving wheel unit 230 are separated. ) Are spaced apart.

In this embodiment, the welding bead line (WBL, see Fig. 12) is limited to the case where the base material (BM, see Fig. 13a) is projected, the first driving wheel 222 and the second driving wheel 232 is the welding Although fixed to the bead line WBL (see FIG. 12) is illustrated, unlike the present embodiment, the first and second driving wheels 222 and 232 are manufactured by a magnetic member having magnetic properties, and The welding bead line WBL (see FIG. 12) is formed on the base material (BM, see FIG. 13A) by having the first and second driving wheels 222 and 232 have a structure supported on the surface of the base material (BM, see FIG. 13A). Even when not protruding from the surface, the leak inspection apparatus may be moved in a state in which the first and second driving wheels 222 and 232 are pressed against the surface of the base material (BM, see FIG. 13A).

 The controller 600 is connected in signal communication with the driving sensor 400 and the driving motor 210 to control the driving motor 210 according to a signal transmitted from the driving sensor 400.

Hereinafter, the operation of the leak test apparatus according to an embodiment of the present invention having the structure as described above will be described in detail.

12 to 13B, first, a user fills a tracer gas such as helium into a hermetic container to be leak tested. When the filling of the gas in the hermetic container is completed, the user may, as shown in FIGS. 13A and 13B, weld bead lines WBL between the first driving wheel unit 220 and the second driving wheel unit 230. At the same time, the insertion grooves 324 (see FIG. 7) of the plurality of inhalers 322 are inserted into each of the plurality of welding bead lines WBL. As shown in FIG. 13A, when the handle part 516 is rotated upward, that is, in the A direction, the connecting rod 520 pulls the second driving wheel unit 230 as in the B direction. As a result, the first driving wheel 222 and the second driving wheel 232 compress the welding bead line WBL so that the leakage inspection apparatus is fixed to the welding bead line WBL.

When the first and second driving wheels 222 and 232 are fixed to the welding bead line WBL, the user turns on the power switch. Then, the control unit 600 (see FIG. 3) drives the driving motor 210 to rotate the first and second driving wheels 222 and 232, and drives the suction motor 360 (see FIG. 3). A negative pressure is formed in the suction hole 328 (see FIG. 7) of the inhaler 322.

When the first and second driving wheels 222 and 232 rotate, the leak inspection apparatus moves along the welding bead line WBL, and the plurality of inhalers 322 each of the plurality of welding bead lines WBL. While moving along, air is sucked in from each weld bead line (WBL). The air sucked by the inhaler 322 is moved to the gas detector 370 (see FIG. 3) through the connection hose 330 via the suction motor 360 (see FIG. 3). The gas detector 370 (see FIG. 3) then analyzes whether the trace gas is present in the sucked air. When the trace gas component is detected, the gas detector 370 (see FIG. 3) sounds an alarm or sends a signal to the control unit 600 (see FIG. 3), and the contents of the gas leakage to the display unit where the control unit 600 is not shown. Outputs

Here, the inhaler 322 is moved up and down by the suction holes 328 which are formed in three upper and lower sides 326a (326b and 7) of the insertion grooves 324 (see FIG. 7) of the inhaler 322. Even if it vibrates, any one of the three suction holes 328 can suck the gas leaked from the welding bead line (WBL).

In addition, the inhaler wheel 350 (refer to FIG. 7) contacting the surface of the base material BM while the leak tester is traveling transmits vibrations transmitted from the surface of the base material BM to the support 345 (refer to FIG. 7). The transmitted vibration is absorbed by the first shock absorbing member 347 (see FIG. 7) and the second shock absorbing member 348 (see FIG. 7), and the driving unit 200 (see FIG. 4) and the inhaler unit 320 (see FIG. 7). ) To prevent delivery.

In addition, when the leak inspection apparatus moves along the welding bead line WBL, the detection needle 410 of the traveling sensor 400 detects the welding bead line WBL, as indicated by a dotted line in FIG. 11, the detection needle. 410 rotates downward when the weld bead line WBL meets the end point, whereby the signal generator 420 outputs a signal indicating the end point of the weld bead line WBL to the controller 600. Then, the control unit 600 (refer to FIG. 3) stops the driving motor 210 (refer to FIG. 3) and the suction motor 360 (refer to FIG. 3) to stop the running of the leak test apparatus.

When the leak test operation is completed, the user rotates the handle portion 516 downward, that is, in the C direction. Then, the elastic member 530 is pressed so that the first side plate 112 and the second driving wheel unit 230 is spaced apart, so that the first and second driving wheels 222 and 232 are separated from the welding bead line WBL. Spaced apart.

Thereafter, the user operates the leak test apparatus through the same process as described above with the other welding bead line WBL, or terminates the work.

According to the present invention as described above, the leak inspection apparatus can detect the gas leakage of the weld bead line (WBL) while automatically traveling along the weld bead line (WBL). The automatic gas leak inspection can not only perform the gas leakage inspection more efficiently, but also improve the precision of the inspection.

In addition, the driving wheels are moved in a state in which the driving wheels are compressed to the welding bead line WBL by the crimping unit, so that the inspection of the welding bead line WBL formed on the ceiling or the vertical surface can be performed. In particular, the axis of each drive wheel is inclined so that the leak inspection apparatus is driven toward the base material BM, so that the leak inspection apparatus can be prevented from being separated from the welding bead line WBL.

In addition, the plurality of inhaler units can perform inspection while traveling the plurality of welding bead lines WBL once, thereby improving the speed of the leakage inspection. In particular, it is possible to adjust the interval between each inhaler unit to be able to inspect the leakage of the weld bead line (WBL) of various intervals.

On the other hand, each inhaler unit is provided with a first and a second buffer member, it is possible to prevent the vibration transmitted from the surface of the base material (BM) to be transmitted to the inhaler unit and the drive unit, to prevent such vibration transmission each component In addition to extending the service life of the welder, the interval between the inhaler and the welding bead line (WBL) can be kept more constant, thereby improving the precision of the inspection.

In addition, the precision of the inspection is further improved by the suction holes formed three up and down in the inhaler.

As a result, as described above, the reliability of the leak inspection apparatus is improved due to the rapidity and accuracy of the leak inspection.

While the invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. That is, those skilled in the art to which the present invention pertains will appreciate that many changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (16)

Casing; A driving unit for moving the casing along the welding bead line (WBL); A suction unit provided in the casing and configured to detect a gas leak in the welding bead line WBL; A traveling sensor for detecting a welding bead line WBL; And And a control unit for controlling the driving unit according to the signal detected from the traveling sensor. According to claim 1, wherein the drive unit, Drive motor; A first driving wheel unit disposed on one side of the driving motor in a direction crossing the driving shaft and rotatably supported by the driving shaft of the driving motor; A second driving wheel unit disposed on the other side of the driving motor in a direction crossing the driving shaft and rotatably supported by the driving shaft of the driving motor; And a power transmission unit for transmitting power of the drive motor to the first and second driving wheel units. The method of claim 2, The lower portion of each of the first and second drive wheel unit, the leakage inspection device, characterized in that a cover for preventing damage to the base material (BM) is provided. The method of claim 3, And a crimping unit configured to rotate the first and second driving wheel units about the driving shaft of the driving motor so that the first and second driving wheel units are close to and spaced apart from each other. The method of claim 4, wherein The first driving wheel unit, A first drive wheel casing rotatably supported by a drive shaft of the drive motor; And And a first driving wheel rotatably supported by the first driving wheel casing. The second driving wheel unit, A second drive wheel casing rotatably supported by a drive shaft of the drive motor; And And a second driving wheel rotatably supported by the second driving wheel casing. The method of claim 5, The first driving wheel includes a first front wheel and a first rear wheel supported by the first driving wheel casing to be spaced a predetermined distance in the direction of the drive shaft of the drive motor, And the second driving wheel includes a second front wheel and a second rear wheel which are supported by the second driving wheel casing to be spaced a predetermined distance in the direction of the drive shaft of the driving motor. The method of claim 6, The rotation axis of each wheel, the leakage inspection device, characterized in that the inclination of the predetermined angle (θ) with respect to the line perpendicular to the direction of travel of the casing so that the casing proceeds to the base material (BM) side. The method of claim 7, wherein the power transmission unit, A first front worm wheel and a first rear worm wheel connected to each axis of the first front wheel and the first rear wheel; A second front worm wheel and a second rear worm wheel connected to the respective axes of the second front wheel and the second rear wheel; A front worm gear-coupled with the first front worm wheel and the second front worm wheel and provided on a drive shaft of the drive motor; And a rear worm gear-coupled with the first rear worm wheel and the second rear worm wheel, the rear worm being provided on a driving shaft of the driving motor. The method of claim 8, wherein the pressing unit, An elastic member installed between the first and second driving wheel casings to press in the direction in which the first and second driving wheel casings are spaced apart from each other; An operating lever rotatably supported by the first driving wheel casing; And A connecting rod mounted on the first driving wheel casing to move in a direction crossing the driving shaft of the driving motor, the connecting rod moving in a direction in which the first and second driving wheels are in close proximity with the rotation of the operation lever; Leakage testing apparatus comprising a. The method of claim 1, wherein the suction unit, An elastic arm provided on the casing; An inhaler unit mounted to the arm; A suction motor for generating a suction force to the inhaler unit; And And a gas detector for analyzing the gas sucked through the inhaler unit. The method of claim 10, The arm is installed in a direction crossing the direction of travel of the casing, The inhaler unit is a leak test device, characterized in that the plurality of spaced apart so as to be movable on the arm. The method of claim 11, Wherein each of the inhaler units is installed to be movable on the arm. The method of claim 12, wherein the inhaler unit, A support unit movably installed along the arm; And And an inhaler detachably mounted to the support unit. The method of claim 13, wherein the support unit, A sliding member movably installed on the arm; A support installed on the sliding member to be movable up and down; And And a first buffer member interposed between the support and the sliding member. The method of claim 14, wherein the support unit, A holder mounted to the support and mounted with the inhaler; A second buffer member interposed between the holder and the support; And And an inhaler wheel for movably supporting the support. The method of claim 15, wherein the inhaler, A groove for inserting a welding bead is formed, and leak detection apparatus, characterized in that a plurality of suction holes are formed in each of the both sides of the groove disposed up and down.

Images