JP6218663B2 - Butt welding inspection device - Google Patents

Description

  The present invention relates to a butt welding inspection apparatus, and more particularly, to a butt welding inspection apparatus for members to be joined that are arranged close to each other.

  As a prior document disclosing the configuration of the leak inspection apparatus, there is JP-A-2003-329532 (Patent Document 1). The leak inspection apparatus described in Patent Document 1 includes a holding unit that holds a film-like object under test in a flat shape and allows a test gas to pass through, and an addition that pressurizes the test gas toward the holding part. The pressure part, the leak space where the test gas leaks from the pressurized part through the DUT, the detection part that detects the test gas, the carrier gas is supplied to the leak space, and the leaked test gas is transported to the leak space And an inspection gas transport mechanism that transports the gas to the detection unit.

JP 2003-329532 A

  In the conventional leak inspection apparatus, it has been difficult to inspect the welded portion of the butt-welded joint between the flanges of the members to be joined that are disposed close to each other to the extent that a person cannot enter.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a butt welding inspection apparatus capable of inspecting a welded portion of a butt weld joint between flanges of members to be joined that are arranged close to each other. To do.

  The butt welding inspection apparatus based on this invention is a butt welding inspection apparatus which test | inspects the welding part of the butt-welding joint of the flanges of the to-be-joined member mutually arrange | positioned on a mount frame. The butt welding inspection apparatus includes an inspection gas pressurizing contact mechanism that makes an inspection gas pressurize and contact the lower side of the welded portion, and an inspection gas detection mechanism that detects the inspection gas that has passed through the welded portion on the upper side of the welded portion. . The inspection gas pressurizing contact mechanism is slidable in the longitudinal direction, a plate-like base portion having a longitudinal direction, a thickness direction, and a height direction perpendicular to both the longitudinal direction and the thickness direction, and A transport mechanism that supports the base unit on a base so that the position can be fixed, an actuator that is provided on the upper part of the base unit and can be expanded and contracted in the vertical direction, and is connected to the upper part of the actuator and has a bottom and opens upward. A pressurizing part in which an opening capable of enclosing the periphery of the welded part from below is formed, an annular elastic body provided on the opening end of the pressurizing part, and an inspection gas inside the opening of the pressurizing part And a test gas supply unit for pressurizing and filling.

  ADVANTAGE OF THE INVENTION According to this invention, the welding part of the butt-welded joint of the flanges of the to-be-joined member arrange | positioned mutually adjacent | abutted is testable.

It is a perspective view which shows the state which the flanges of the lower tank of the transformer of the decomposition | disassembly transport system arrange | positioned on the mount were joined. It is a front view which expands and shows the II section of FIG. It is a side view showing the composition of the inspection gas pressurization contact mechanism in the butt welding inspection device concerning one embodiment of the present invention. It is the figure which looked at the test gas pressurization contact mechanism of FIG. 3 from the arrow IV-IV line arrow direction. It is a side view which shows the structure of the test | inspection gas detection mechanism in the butt welding test | inspection apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the state which made the inspection gas pressurization contact mechanism of the butt-welding inspection apparatus which concerns on one Embodiment of this invention slide, and is inserted between mutually adjacent lower tanks. In one Embodiment of this invention, it is a side view which shows the state which lifted the test gas pressurization contact mechanism and made it approach the lower tank. In one Embodiment of this invention, it is a side view which shows the state which lifted the test gas pressurization contact mechanism and inserted between the mutually adjacent lower tanks. In one Embodiment of this invention, it is the side view which shows the state which mounted the wheel located in the front end side of a slide movement direction on the mount in the state which suspended the rear end of the slide movement direction in the test gas pressurization contact mechanism. is there. In one Embodiment of this invention, it is a side view which shows the state which fixed the position of the test gas pressurization contact mechanism on the mount frame. It is the front view which looked at the test gas pressurization contact mechanism of Drawing 10 from the direction of arrow XI. In one Embodiment of this invention, the actuator of a test gas pressurization contact mechanism is extended, and it is a side view which shows the state which pressed the elastic body against the flange of the lower tank. It is the partial cross section figure which looked at the pressurization part periphery in the test gas pressurization contact mechanism of FIG. 12 from the XIII-XIII line arrow direction. It is the partial cross section figure which looked at the pressurization part periphery in the test gas pressurization contact mechanism of FIG. 12 from the XIV-XIV line arrow direction. In one Embodiment of this invention, it is a perspective view which shows the state which made the test gas pressurize and contact a welding part with the test gas pressurization contact mechanism, and has detected the test gas which passed the weld part with the test gas detection mechanism. is there.

  Hereinafter, a butt welding inspection apparatus according to an embodiment of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

  First, as an example of a member to be joined, a lower tank in a disassembled transport type transformer will be described. FIG. 1 is a perspective view showing a state where flanges of a lower tank of a transformer of an exploded transport system arranged on a gantry are joined together. FIG. 2 is an enlarged front view showing a portion II in FIG.

  The disassembled transport type transformer is a three-phase transformer that is transported for each single phase and then assembled by being connected to each other at a place of use. Therefore, the lower tank in the disassembled transportation type transformer is divided into three. At the time of transporting the disassembled transport type transformer, as shown in FIG. 1, the transport cover 12 is placed on each flange 11 f of the lower tank 11. The transport cover 12 prevents foreign matter from entering the lower tank 11 when transporting the disassembled transport type transformer.

  As shown in FIG. 1, the three lower tanks 11 transported to the place of use are arranged close to each other on the gantry 20. The dimension of the interval L1 between the lower tanks 11 adjacent to each other is, for example, 120 mm. The dimension of the distance L2 between the transport covers 12 adjacent to each other is, for example, 200 mm. The dimension of the length L3 of the lower tank 11 is, for example, 3000 mm. The dimension of the width L4 of the gantry 20 is, for example, 3100 mm.

  As shown in FIGS. 1 and 2, the flanges 11 f of the lower tank 11 arranged close to each other are butt welded. Specifically, as shown in FIG. 2, a V-shaped groove 11 t is provided on the flange 11 f of the lower tank 11. In a state where the backing metal 13 is disposed below the V-shaped groove 11t, the flanges 11f of the lower tank 11 adjacent to each other are joined together by the welded portion 14, whereby a butt weld joint is configured.

  At the time of assembling the disassembled transport type transformer, the transport cover 12 is removed, and one upper tank is placed on the three lower tanks 11 joined together. The internal space formed by the upper tank and the lower tank 11 is filled with insulating gas or insulating oil. For this reason, if there is a defect in the welded portion 14 of the butt weld joint, leakage of insulating gas or insulating oil occurs, resulting in an assembly failure of the disassembly and transportation type transformer.

  In order to prevent such an assembly failure of the disassembled transportation type transformer, in the state shown in FIG. 1, which is a state before the transport cover 12 is removed after the flanges 11f of the lower tank 11 are butt welded together. The welded joint 14 of the welded joint is inspected for defects. The butt welding inspection apparatus according to the present embodiment is used for inspection of the welded portion 14 of the butt weld joint.

  Hereinafter, the configuration of the butt welding inspection apparatus according to the present embodiment will be described. In the butt welding inspection apparatus according to the present embodiment, the inspection gas pressurizing contact mechanism 100 that pressurizes and contacts the lower side of the welded portion 14 and the inspection gas that has passed through the welded portion 14 on the upper side of the welded portion 14. And an inspection gas detection mechanism 200 for detecting.

  FIG. 3 is a side view showing a configuration of an inspection gas pressurizing contact mechanism in the butt welding inspection apparatus according to the present embodiment. FIG. 4 is a view of the inspection gas pressurizing contact mechanism of FIG. 3 as viewed from the direction of arrows IV-IV. FIG. 5 is a side view showing a configuration of an inspection gas detection mechanism in the butt welding inspection apparatus according to the present embodiment. In FIG. 3, a vertical line 1 passing through the center of gravity of the inspection gas pressurizing contact mechanism 100 is shown.

  As shown in FIGS. 3 and 4, the inspection gas pressure contact mechanism 100 of the butt welding inspection apparatus according to this embodiment includes a longitudinal direction L, a thickness direction T, and both the longitudinal direction L and the thickness direction T. A plate-like base portion 110 having a height direction H perpendicular to the vertical direction; a transport mechanism that supports the base portion 110 on the gantry 20 so as to be slidable and position-fixable in the longitudinal direction L; An actuator 120 that is provided and can be vertically expanded and contracted, and an opening 131 that is connected to the upper portion of the actuator 120 and that opens upward while having a bottom and can surround the periphery of the welded portion 14 from below is formed. The pressure unit 130, an annular elastic body 140 provided on the opening end of the pressurization unit 130, and a test gas supply unit 150 that pressurizes and fills the test gas inside the opening 131 of the pressurization unit 130 are provided. .

  In the present embodiment, the base portion 110 is made of an iron plate, but the material of the base portion 110 is not limited to this, and the actuator 120 extends to make the elastic body 140 into the flange 11f of the lower tank 11 as will be described later. Any material may be used as long as it has rigidity capable of withstanding the reaction force when pressed.

  The base portion 110 has a substantially trapezoidal outer shape in a side view, but the side view shape of the base portion 110 is not limited to this, and a wheel 111, a ball bearing 112, a suspension 113, and an actuator, which will be described later, are included. What is necessary is just the shape which can mount 120, and can endure said reaction force.

  The transport mechanism includes a wheel 111 provided at a lower portion of the base portion 110 and a plurality of suspension hands provided at least at an end portion and a central portion in the longitudinal direction L in the base portion 110.

  In the present embodiment, a wheel 111 is provided at the lower part of each end portion in the longitudinal direction L of the base portion 110. The dimension of the gap L5 between the wheels 111 in the longitudinal direction L is slightly larger than the dimension of the width L4 of the gantry 20 shown in FIG.

  As shown in FIG. 4, the hanging hands 113 are provided in pairs on both sides in the thickness direction T in the base portion 110. The pair of suspenders 113 is composed of a small diameter portion penetrating the base portion 110 and large diameter portions provided at both ends of the small diameter portion.

  In the present embodiment, as shown in FIG. 3, the base portion 110 is provided with two pairs of hangers 113 a at the center in the longitudinal direction L, and a pair of hangers 113 b at each of both ends in the longitudinal direction L. Is provided. The two pairs of hanging hands 113a are arranged so that the vertical line 1 is located in the middle of each other in a side view.

  The transport mechanism further includes ball bearings 112 provided in pairs on both sides in the thickness direction T in the base portion 110. In the present embodiment, six pairs of ball bearings 112 are arranged in a matrix in a side view. Two pairs of the ball bearings 112 out of the six pairs of ball bearings 112 are located at a distance from each other on the vertical line 1 in a side view.

  The dimension of the outer width L6 in the thickness direction T of the pair of ball bearings 112 shown in FIG. 4 is slightly smaller than the dimension of the distance L1 between the lower tanks 11 shown in FIG. In the six pairs of ball bearings 112, the dimensions of the outer width L6 are substantially the same. The dimension of the outer width L6 is the maximum dimension in the thickness direction T of the inspection gas pressurizing contact mechanism 100 of the butt welding inspection apparatus according to the present embodiment.

  In the present embodiment, as shown in FIG. 3, a plurality of actuators 120 are provided at intervals in the longitudinal direction L. Specifically, nine actuators 120 are provided at intervals in the longitudinal direction L. The actuator 120 is a power cylinder such as an air cylinder or a hydraulic cylinder. By providing a plurality of actuators 120, it is possible to press the elastic body 140 more uniformly against the flange 11f of the lower tank 11 as compared to the case where only one actuator 120 is provided.

  Each of the two actuators 120b located at both ends in the longitudinal direction L has a cylinder 121b that moves up and down. As the cylinder 121b moves up and down, the actuator 120b expands and contracts in the vertical direction.

  A ring 122b is fitted into the upper end of the cylinder 121b. The upper end of the cylinder 121b is connected to the lower surface of the pressure unit 130. The ring 122b restricts the cylinder 121b from swinging with respect to the pressurizing unit 130, whereby the actuator 120b and the pressurizing unit 130 are fixed to each other.

  Each of the actuators 120a located between the two actuators 120b has a cylinder 121a that moves up and down. As the cylinder 121a moves up and down, the actuator 120a expands and contracts in the vertical direction. The upper end of the cylinder 121a is connected to the lower surface of the pressure unit 130 with the universal joint 122a interposed therebetween. The actuator 120a is swingably connected to the pressure unit 130 by the universal joint 122a.

  The pressurizing unit 130 has an opening 131 and has a bathtub-shaped outer shape. The opening 131 is large enough to accommodate the backing metal 13 while having a gap with respect to the backing metal 13 when the actuator 120 extends and presses the elastic body 140 against the flange 11f of the lower tank 11 as will be described later. Is formed.

  The peripheral wall of the pressurizing unit 130 is provided with a through hole to which a connection pipe 151 to the inspection gas supply unit 150 is connected. This through hole communicates with the opening 131.

  In the present embodiment, the pressurizing unit 130 is made of iron, but the material of the pressurizing unit 130 is not limited to this, and the actuator 120 extends to make the elastic body 140 a flange of the lower tank 11 as will be described later. Any material having a rigidity capable of withstanding the compressive force when pressed against 11f may be used.

  An annular elastic body 140 is attached to the opening end of the pressure unit 130 with an adhesive. In the present embodiment, the elastic body 140 is a rubber such as nitrile rubber, urethane rubber, styrene rubber, silicone rubber, or fluorine rubber, but the material of the elastic body 140 is not limited to rubber, for example, polytetrafluoroethylene or the like. This resin may be used.

  The inspection gas supply unit 150 fills the inside of the opening 131 of the pressurization unit 130 with the pressurized helium gas as the inspection gas through the connection pipe 151. Specifically, in a state where the actuator 120 is extended and the elastic body 140 is pressed against the flange 11f of the lower tank 11, as will be described later, the lower surface of the flange 11f of the lower tank 11, the inner peripheral surface of the elastic body 140, A space formed by the inner surface of the pressure unit 130 is filled with pressurized helium gas.

  In the inspection gas pressure contact mechanism 100 of the butt welding inspection apparatus according to the present embodiment, the actuator 120 and the pressure unit 130 are arranged on the plate-like base unit 110 in the height direction H. In the plate-like base portion 110, the dimension in the thickness direction T is smaller than the dimension in the longitudinal direction L. As described above, since the inspection gas pressurizing contact mechanism 100 is assembled with the plate-like base portion 110 in an upright state, as will be described later, the lower tanks 11 arranged close to each other to the extent that no one can enter them. It is configured to be insertable between.

  As shown in FIG. 5, the inspection gas detection mechanism 200 of the butt welding inspection apparatus according to this embodiment includes a strip-shaped base 210, wheels 220 provided at the bottom of the base 210, and a handle attached to the base 210. 230, a hinge 240 that connects the base 210 and the handle 230, and a probe 250 that is attached to the lower surface of the base 210 and detects helium gas. The inspection gas detection mechanism 200 is a helium leak detector that detects helium gas by a so-called sniffer method.

  The width dimension of the base 210 and the handle 230 is smaller than the dimension of the distance L2 between the adjacent transport covers 12 shown in FIG. Further, the width of the wheel 220 is slightly smaller than the maximum width of the V-shaped groove 11t in the flange 11f of the lower tank 11 shown in FIG.

  Hereinafter, a method for inspecting the welded portion 14 of the butt weld joint using the butt welding inspection apparatus according to the present embodiment will be described. First, operation | movement of the test gas pressurization contact mechanism 100 in the butt welding test | inspection apparatus which concerns on this embodiment is demonstrated.

  FIG. 6 is a perspective view showing a state in which the inspection gas pressurizing contact mechanism of the butt welding inspection apparatus according to the present embodiment is slid and inserted between adjacent lower tanks. As shown in FIG. 6, the test gas pressurizing contact mechanism 100 with the actuator 120 contracted is slid between the lower tanks 11 adjacent to each other toward one of the longitudinal directions of the base portion 110 indicated by the arrow 2. Move and insert.

  Here, a slide moving method and a position fixing method of the test gas pressurizing contact mechanism 100 in the present embodiment will be described.

  FIG. 7 is a side view showing a state in which the inspection gas pressurizing contact mechanism is lifted and brought close to the lower tank in the present embodiment. FIG. 8 is a side view showing a state in which the inspection gas pressurizing contact mechanism is lifted and inserted between adjacent lower tanks in the present embodiment. FIG. 9 is a side view showing a state in which the wheel located on the front end side in the slide movement direction is placed on the gantry in a state where the rear end in the slide movement direction in the inspection gas pressurizing contact mechanism is hung in the present embodiment. It is. FIG. 10 is a side view showing a state where the inspection gas pressurizing contact mechanism is fixed on the gantry in the present embodiment. FIG. 11 is a front view of the inspection gas pressurizing contact mechanism of FIG. 10 as viewed from the direction of the arrow XI.

  As shown in FIG. 7, the test gas pressurizing contact mechanism 100 is hung by the crane 30 with the wires 31 hung on the two pairs of suspenders 113 a and is slid in the direction indicated by the arrow 2 to thereby move the lower tank 11. To approach. In the present embodiment, a ring provided at the tip of the wire 31 is hung on the small diameter portion of the hanging hand 113. The large-diameter portion of the hanging hand 113 functions as a retaining ring for the wire 31.

  As shown in FIG. 8, the crane 30 is moved until the leading end side in the sliding movement direction of the test gas pressurizing contact mechanism 100 is inserted between the lower tanks 11 adjacent to each other.

  Thereafter, as shown in FIG. 9, the wire 31 is exchanged with a pair of hangers 113 b located at the rear end in the slide movement direction in the test gas pressurizing contact mechanism 100, and the slide move direction in the test gas pressurizing contact mechanism 100. With the rear end suspended, the wheel 111 located on the front end side in the slide movement direction is placed on the gantry 20.

  The test gas pressurizing contact mechanism 100 is slid in the direction indicated by the arrow 2 between the lower tanks 11 by traveling on the gantry 20 by the wheels 111 in a state where the test gas pressurizing contact mechanism 100 is lifted by the pair of suspenders 113b. .

  As shown in FIG. 10, the crane 30 is moved until the wheel 111 located on the distal end side in the sliding movement direction in the test gas pressurizing contact mechanism 100 drops off from the gantry 20. As described above, the dimension of the gap L5 between the wheels 111 is slightly larger than the dimension of the width L4 of the gantry 20.

  Therefore, in a state where the wheel 111 located on the front end side in the slide movement direction in the test gas pressurizing contact mechanism 100 is dropped from the gantry 20, the wire 31 is removed from the pair of hangers 113b and the test gas pressurizing contact mechanism 100 is removed. When the lifting of the wheel is released, the wheel 111 located on the rear end side in the sliding direction of the inspection gas pressurizing contact mechanism 100 is also dropped from the gantry 20.

  As a result, the inspection gas pressurizing contact mechanism 100 is fixed on the gantry 20 by placing the base portion 110 on the gantry 20 and placing the two wheels 111 so as to sandwich the gantry 20 therebetween. By the above steps, the inspection gas pressurizing contact mechanism 100 can be inserted between the lower tanks 11 arranged close to each other to the extent that no one can enter.

  As described above, the outer width L6 of the pair of ball bearings 112 is slightly smaller than the distance L1 between the lower tanks 11. Therefore, as shown in FIG. 11, in the test gas pressurizing contact mechanism 100, the ball bearing 112 is slid between the lower tanks 11 while being in contact with the adjacent lower tanks 11. As a result, as shown in FIG. 11, the inspection gas pressurizing contact mechanism 100 can be fixed at an intermediate position between the lower tanks 11 adjacent to each other. Thereby, the pressurization part 130 can be arrange | positioned directly under the welding part 14 of a butt-welding joint.

  Next, a method for bringing the inspection gas into contact with the lower side of the welded portion 14 in the inspection gas pressure contact mechanism 100 according to the present embodiment will be described.

  FIG. 12 is a side view showing a state in which the actuator of the test gas pressurizing contact mechanism is extended and the elastic body is pressed against the flange of the lower tank in the present embodiment. FIG. 13 is a partial cross-sectional view of the vicinity of the pressurization unit in the test gas pressurization contact mechanism of FIG. 12 as viewed from the direction of the arrow XIII-XIII. FIG. 14 is a partial cross-sectional view of the periphery of the pressurization unit in the test gas pressurization contact mechanism of FIG. 12 as viewed from the direction of the arrows XIV-XIV.

  As shown in FIG. 12, in a state where the inspection gas pressurizing contact mechanism 100 is fixed on the gantry 20, the elastic body 140 is attached to the flange 11 f of the lower tank 11 by the actuator 120 extending upward indicated by the arrow 3. Pressed.

  As described above, the cylinder 121a of the actuator 120a is swingably connected to the pressurizing unit 130 in the direction indicated by the arrow 4 by the universal joint 122a as shown in FIG. As shown in FIG. 14, the cylinder 121b of the actuator 120b is restricted from swinging with respect to the pressurizing unit 130 by a ring 122b.

  By configuring the actuator 120a and the actuator 120b as described above, the bottom surface of the pressurizing unit 130 connected to the upper end of the cylinder 121b and the axis of the cylinder 121b maintain a substantially vertical positional relationship. The crossing angle of the bottom surface of the pressurizing unit 130 connected to the upper end of 121a and the axis of the cylinder 121a changes according to the distortion of the lower surface of the flange 11f. That is, when the actuator 120 extends and presses the elastic body 140 against the lower surface of the flange 11f of the lower tank 11, the pressurizing unit 130 is deformed so as to be twisted corresponding to the distortion of the lower surface of the flange 11f.

  In addition, the elastic body 140 that the actuator 120 extends and is pressed against the lower surface of the flange 11f of the lower tank 11 is brought into close contact with the unevenness of the lower surface of the flange 11f of the lower tank 11 by elastic deformation.

  As described above, the elastic body 140 is brought into close contact with the lower surface of the flange 11f of the lower tank 11 in response to the distortion and unevenness of the lower surface of the flange 11f of the lower tank 11, A space formed by the inner peripheral surface of the elastic body 140 and the inner surface of the pressure unit 130 can be a sealed space.

  The sealed space is filled with pressurized helium gas from the inspection gas supply unit 150 through the connection pipe 151. As a result, helium gas can be brought into contact with the lower side of the welded portion 14 of the butt weld joint while being pressurized. In order to do this, it is preferable that three or more actuators 120 are provided.

  Next, a method for detecting the inspection gas that has passed through the welded portion 14 by the inspection gas detection mechanism 200 in the butt welding inspection apparatus according to the present embodiment will be described.

  FIG. 15 is a perspective view showing a state in which the inspection gas is brought into contact with the welded portion by the inspection gas pressurizing contact mechanism while being in contact with the welded portion and the inspection gas passing through the welded portion is detected by the inspection gas detecting mechanism in the present embodiment. It is.

  As shown in FIG. 15, the probe 250 is scanned immediately above the welded portion 14 by sliding the inspection gas detection mechanism 200 in the direction indicated by the arrow 5 along the welded portion 14 of the butt weld joint.

  As described above, in the present embodiment, the width of the wheel 220 is slightly smaller than the maximum width of the V-shaped groove 11t in the flange 11f of the lower tank 11 shown in FIG. By rolling as a guide groove, the inspection gas detection mechanism 200 can be easily run on the welded portion 14.

  When the inspection gas detection mechanism 200 detects helium gas that has passed through the welded portion 14, it is found that the welded portion 14 is defective. Note that the inspection gas detection mechanism 200 may be configured such that an encoder is attached to the wheel 220 and the defect position of the welded portion 14 can be specified by the number of rotations of the wheel 220.

  The butt weld inspection apparatus according to the present embodiment can inspect the welded portion of the butt weld joint between the flanges of the members to be joined that are arranged close to each other to the extent that a person cannot enter, by the above configuration.

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It does not become a basis of limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the scope of claims. Further, all modifications within the meaning and scope equivalent to the scope of the claims are included.

  11 Lower tank, 11f Flange, 11t V-shaped groove, 12 Transport cover, 13 Backing metal, 14 Welded part, 20 Mount, 30 Crane, 31 Wire, 100 Inspection gas pressure contact mechanism, 110 Base part, 111, 220 Wheel, 112 Ball bearing, 113, 113a, 113b Lifter, 120, 120a, 120b Actuator, 121a, 121b Cylinder, 122a Universal joint, 122b Ring, 130 Pressurization part, 131 Opening, 140 Elastic body, 150 Inspection gas supply Part, 151 connection piping, 200 inspection gas detection mechanism, 210 units, 230 handle, 240 hinge, 250 probe.

Claims (4)

A butt welding inspection device for inspecting a welded portion of a butt weld joint between flanges of members to be joined that are arranged close to each other on a gantry,
A test gas pressurizing contact mechanism that pressurizes and contacts a test gas under the weld,
An inspection gas detection mechanism for detecting the inspection gas that has passed through the weld on the upper side of the weld;
The inspection gas pressure contact mechanism is
A plate-like base portion having a longitudinal direction, a thickness direction, and a height direction perpendicular to both the longitudinal direction and the thickness direction;
A transport mechanism that supports the base portion on the gantry so as to be slidable and positionally fixed in the longitudinal direction;
An actuator provided at the upper part of the base part and capable of extending and contracting in the vertical direction;
A pressurizing part connected to the upper part of the actuator, having a bottom and opening upward to form an opening capable of surrounding the periphery of the welded part from below;
An annular elastic body provided on the open end of the pressure unit;
A test gas supply unit that pressurizes and fills the test gas inside the opening of the pressurizing unit ,
The transport mechanism includes a wheel provided at a lower portion of the base portion, and a plurality of suspensions provided at least at an end portion and a central portion in the longitudinal direction in the base portion,
In the inspection gas pressurizing contact mechanism, the wheel is lifted by the suspension provided at the central portion, and the wheel is placed on the gantry, and is lifted by the suspension provided at the end. The butt welding inspection in which the wheels are slid between the members to be joined by running on the pedestal by the wheels, and the positions of the wheels are fixed on the pedestal by dropping from the pedestals. apparatus.   The butt welding inspection apparatus according to claim 1, wherein a plurality of the actuators are provided at intervals in the longitudinal direction. Three or more actuators are provided at intervals in the longitudinal direction,
The two actuators located at both ends in the longitudinal direction and the pressure unit are fixed to each other,
The butt welding inspection apparatus according to claim 2, wherein the actuator located between the two actuators is swingably connected to the pressurizing unit. The transport mechanism further includes ball bearings provided on both sides of the thickness direction in the base portion,
4. The inspection gas pressurizing contact mechanism according to claim 1 , wherein the ball bearing slides between the members to be bonded while contacting the two members to be bonded. 5. Butt welding inspection equipment.

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