Inspection device for gas pipe

Abstract

The present invention relates to a device for inspecting the fastening state of a gas pipe, the device comprising a plurality of inspection tools so as to be able to inspect the fastening state of gas pipes having various diameters, enabling pipes of various dimensions to be inspected using a single inspection device. Therefore, the clearance and tightening state of pipes and fittings can be more reliably and easily verified.

Description

Gas pipeline inspection device

[0001] The present invention relates to an inspection device for gas pipelines.

[0002] For gas transmission, pipes of a specified length must be connected to each other using fittings, or specific devices and pipes must be connected using fittings to supply gas to those devices. In this process, the connection between pipes or between devices and pipes must be precisely set to prevent gas leakage. In particular, for pipes transporting gases with relatively small particles, such as hydrogen, helium, and nitrogen, gas leakage can occur if the connections are not properly joined.

[0003] In other words, if over-torque is applied to the pipe connection by the fastener, the threads are damaged, leading to a problem of gas leakage. When performing pipe connections, relying solely on the skills of a skilled worker increases the likelihood of such defects. To prevent this, inspection ports are used to check the degree of fastening in both a provisional and a fully connected state. Specifically, to ensure that the gap between the fastener and the counterpart—for example, between a fitting and a fastener—is accurately set, an inspection port is used to measure the gap between the fitting and the fastener in the provisional state, and another inspection port is used to measure whether the gap between the fitting and the fastener at the pipe connection has reached the set value in the fully connected state.

[0004] However, to use inspection ports in this way, a separate inspection port must be used for pipes of various diameters, and additionally, an inspection port for a loose connection and an inspection port for a fully connected connection must be used separately, which increases the number of inspection ports. Therefore, there is a problem in that the worker must be at the work site with multiple inspection ports for a specific inspection.

[0005] In addition, since these inspection ports are all manufactured separately, there is a problem in that it is very inconvenient for workers to store and manage them.

[0006] In addition, these inspection ports have the problem that the size of the inspection port must increase as the diameter of the pipe increases, so there is also a problem where the sizes of the various inspection ports vary widely.

[0007] In addition, conventional inspection devices are made solely of the device itself and lack a separate handle, which causes inconvenience for the operator to handle.

[0008] Meanwhile, related prior art includes Japanese published patent No. 2006-2006-258220, Japanese published patent No. 2007-253242, and Korean published patent No. 10-2021-0112129.

[0009]

[0010] The objective of the present invention is to solve the problems of the prior art as described above by providing a gas pipeline inspection device integrally equipped with multiple inspection ports capable of inspecting the provisional and complete connection states of pipelines of various dimensions.

[0011] The objective of the present invention is to enable inspection by moving a plurality of inspection holes inside and outside a case by rotation and positioning the inspection holes in a straight line relative to the case.

[0012] The objective of the present invention is to enable the accurate setting of the connection position between the pipe and the collar before connecting the pipe and the fitting.

[0013] The objective of the present invention is to increase the portability of a device for detecting the connection status of a pipe.

[0014] The objective of the present invention is to miniaturize the size of a device for detecting the connection status of a pipe.

[0015] The gas pipeline inspection device of the present invention for achieving the above-mentioned purpose may include a case, a hinge assembly having a hinge pin positioned across the interior of the case, and a plurality of inspection ports each having a provisional connection measuring part and a connection measuring part that rotate around the hinge pin to enter and exit the interior and exterior of the case and measure the connection status of the pipeline.

[0016] The above case may include a case body, a case side wall formed extending in the longitudinal direction of the case body along the widthwise edge of the case body, and a hanging wall located between the case side walls that acts as a stopper when the inspection hole is rotated to the outside of the case.

[0017] The above inspection device may include a plate-shaped body having a hinge hole formed on one side, a provisional fastening measuring part and a fastening measuring part formed along one edge of the body, and a hanging groove formed in the part of the body adjacent to the hinge hole where the hanging wall is located.

[0018] One inner surface of the above-mentioned hanging groove is formed as an inclined surface having a predetermined slope, and when the hanging wall is positioned in the above-mentioned hanging groove, the inspection hole in the above-mentioned case can be extended in the longitudinal direction of the above-mentioned case.

[0019] The above-mentioned provisional fastening measuring part and fastening measuring part may be in the shape of a groove having a predetermined radius of curvature.

[0020] There is a step difference between the above-mentioned temporary fastening measuring part and the fastening measuring part, so that the body part on which the fastening measuring part is formed may be formed with a thickness smaller than the body part on which the temporary fastening measuring part is formed.

[0021] The above-mentioned provisional fastening measuring part and fastening measuring part may each be formed along both edges in the width direction of the body.

[0022] The above-mentioned provisional fastening measuring part and fastening measuring part may be formed as a circle smaller than a semicircle.

[0023] The provisional fastening measuring part and the fastening measuring part formed sequentially along one edge of a single inspection hole may have the same radius of curvature.

[0024] Multiple measuring grooves with different depths and widths may be formed on the outer surface of the above case.

[0025] The above case and inspection device can be made of lightweight metal.

[0026] The above case and inspection device can be made of aluminum alloy.

[0027] The inspection device having the above-mentioned temporary fastening measuring part and fastening measuring part may have a length that can be accommodated inside the case.

[0028]

[0029] The inspection device for gas pipelines according to the present invention may have at least one of the following effects.

[0030] In the present invention, multiple inspection ports are installed in a single case, and an inspection port can be selected and rotated relative to the case to be used. Accordingly, the fastening status of pipes having various diameters can be verified using multiple inspection ports in a single inspection device.

[0031] In addition, the present invention enables inspection of the provisional and full fastening states using a single inspection tool, thereby providing the effect of using a relatively small number of inspection tools.

[0032] In the present invention, the inspection port, which was housed inside the case, is rotated to the outside of the case so that the inspection port extends outward relative to the case, thereby measuring the connection status of the pipe. Accordingly, the inspection port protrudes to the outside of the case during inspection, but is normally located inside the case, so the entire device can be miniaturized and portability improved.

[0033] In addition, in the present invention, the case can be used as a handle to perform inspection using the inspection device. Therefore, there is also the effect of making handling of each inspection device relatively easy.

[0034] In the present invention, a measuring groove is provided on one outer surface of the case to measure and verify the connection position between the pipe and the collar. Accordingly, in addition to the connection state of the pipe, the mounting position of the collar for connecting the pipe can also be accurately set, thereby providing the effect of making the connection of the gas pipe more accurate.

[0035] In the present invention, a portion with a different thickness is placed in a single inspection port, and a provisional fastening measuring portion and a fastening measuring portion are placed in each of these portions, thereby enabling the detection of the fastening status of the pipe and allowing the device to have more functions.

[0036] Furthermore, the aforementioned provisional fastening measuring part and fastening measuring part do not wrap around the entire outer surface of the pipe, but only a portion of it, so that the length of the inspection port can be relatively shortened. Consequently, the length of the entire inspection port can be made uniform, and the overall length of the device is shortened.

[0037] In addition, in the present invention, a provisional fastening measuring part and a fastening measuring part can be placed on each side in the width direction of a single inspection hole. Accordingly, a maximum of four inspection functions can be provided in a single inspection hole, so that the number of functions can be increased while the size can be reduced relatively.

[0038] In the present invention, both the case and the inspection port are made of aluminum alloy. Therefore, although multiple inspection ports are installed in the case, the weight can be relatively light, which offers the advantage of improved portability.

[0039] In addition, in the present invention, the case and inspection device form an oxide layer on the aluminum surface to provide corrosion resistance, wear resistance, and resistance to UV radiation, thereby providing the effect of good overall durability.

[0040] FIG. 1 is a perspective view showing a preferred embodiment of a gas pipe connection status inspection device according to the present invention.

[0041] FIG. 2 is a perspective view showing the inspection device unfolded in an embodiment of the present invention.

[0042] FIG. 3 is an exploded perspective view showing the configuration of an embodiment of the present invention.

[0043] FIG. 4 is a front perspective view showing a case constituting an embodiment of the present invention.

[0044] FIG. 5 is a front bottom perspective view showing a case constituting an embodiment of the present invention.

[0045] FIG. 6 is a side view showing a case constituting an embodiment of the present invention.

[0046] FIG. 7 is a perspective view showing inspection devices constituting an embodiment of the present invention.

[0047] FIG. 8 is an enlarged perspective view showing in detail the configuration of the first inspection device constituting an embodiment of the present invention.

[0048] FIG. 9 is an exploded perspective view showing the configuration of a fitting and a tube, etc., whose fastening state is inspected using an inspection device of an embodiment of the present invention.

[0049] FIG. 10 is a cross-sectional view showing the combined state of the components illustrated in FIG. 9.

[0050] FIG. 11 is a usage diagram showing the position of a collar in a tube using a measuring groove in a case in an embodiment of the present invention.

[0051] FIG. 12 is a usage diagram showing the measurement of the connection state between a tube and a fitting using an inspection device of an embodiment of the present invention.

[0052] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0053] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended only to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that another component may also be "connected," "combined," or "connected" between each component.

[0054] The configuration of the gas piping connection status inspection device of an embodiment of the present invention is explained with reference to the drawings. The inspection device of the present invention verifies the clearance and tightening status of gas piping and fittings, such as compressors, chargers, and gas control panels. In particular, it prevents overtightening of gas piping and fittings, and prevents gas leakage by ensuring there is no variation in the insertion depth of the collar after cone thread and screw thread machining.

[0055] In the inspection device of the embodiment of the present invention, the case (10) forms the exterior. The case (10) not only forms the exterior of the entire device but can also serve as a handle during measurement operations. The case body (12) forms the frame of the case (10). The case body (12) is approximately rectangular in shape. Along both sides in the width direction of the case body (12), case side walls (13) may be extended in the length direction of the case body (12). The case side walls (13) on both sides are extended side by side.

[0056] A hinge hole (14) is formed in the case side wall (13). The hinge holes (14) are formed on both case side walls (13) facing each other. A hinge assembly (20), which will be described below, is positioned through the hinge hole (14).

[0057] There is a hanging wall (15) between the case side walls (13) on the side where the hinge hole (14) is formed. The hanging wall (15) can be positioned in the hanging grooves (313, 323, 333, 343, 353) described below when the inspection hole (30), described below, protrudes outside the case (10). The case side walls (13) on the opposite side where the hanging wall (15) is located are open. This is to allow a worker to make contact with the inspection hole (30) with their finger when pulling the inspection hole (30) inside the case (10) out.

[0058] There are multiple measuring grooves (17) on the outer surface of the case body (12). The measuring grooves (17) are the first through fifth measuring grooves (171, 172, 173, 174, 175). The depths of the measuring grooves (17) vary. The widths of the measuring grooves (17) also vary. As can be seen in FIG. 6, the depth of the first measuring groove (171) is the deepest and the width is the widest. Next, as one moves from the second measuring groove (172) to the fifth measuring groove (175), the depth gradually decreases and the width gradually decreases. The outer surface of the case body (12) on which the measuring grooves (17) are formed is called the reference surface (18). The reference surface (18) forms a constant plane. Using the measuring grooves (17) and the reference surface (18), the position where the collar (80), which will be described below, is installed in the pipe (60) is set. That is, when explained based on the collar (80), the degree to which the pipe (60) protrudes from the collar (80) is measured using the measuring groove (17) and the reference surface (18).

[0059] The first measuring groove (171) is used for measuring the diameter of the pipe (60) which is relatively large. It can be used to measure the installation position of the collar (80) as the diameter of the pipe (60) becomes progressively smaller as it goes from the second measuring groove (172) to the fifth measuring groove (175). The fifth measuring groove (175) and the reference surfaces (18) on both sides thereof can be used to set the position of the collar (80) for the pipe (60) having the smallest diameter.

[0060] As can be seen in FIG. 3, the hinge assembly (20) includes a hinge pin (22) and a hinge fastener (24). The hinge pin (22) may have a rod shape. The hinge pin (22) serves as the rotational center of the inspection member (30). The hinge pin (22) may be located between the case side walls (13). The hinge fastener (24) may be fastened to the hinge pin (22) by penetrating the hinge hole (14) of the case side wall (13). The hinge fastener (24) is located on each side of the hinge pin (22). The hinge fastener (24) serves to fasten the hinge pin (22) to the case (10).

[0061] A plurality of inspection holes (30) may be positioned in the above case (10). In this embodiment, there are five inspection holes (30). That is, in the illustrated embodiment, there are a first inspection hole (310), a second inspection hole (320), a third inspection hole (330), a fourth inspection hole (340), and a fifth inspection hole (350). These inspection holes (30) may be housed inside the above case (10), that is, in the space between the case side walls (13).

[0062] The inspection holes (30) are installed in the case (10) so as to be rotatable at a predetermined angle by the hinge assembly (20). The inspection holes (30) can be rotated relative to the case (10) around the hinge assembly (20).

[0063] The first inspection hole (310) has a first body (311) that forms the exterior and frame. The first body (311) is approximately rectangular in shape. A first hinge hole (311') is located at one end of the first body (311). The hinge pin (22) passes through the first hinge hole (311'). A first hanging groove (313) is located at a position adjacent to the first hinge hole (311'). As can be seen in FIG. 7, the first hanging groove (313) is formed by cutting out the first body (311), and one inner surface may have a certain slope. The inclination of one side of the inner surface of the first hanging groove (313) is intended to avoid interference with the hanging wall (15) of the case (10) when the first inspection hole (310) rotates around the hinge assembly (20).

[0064] At the other end of the first body (311), there is a provisional fastening measuring part 1 (314) and a fastening measuring part 1 (315). The fastening measuring part 1 (315) is closer to the other end of the first body (311) than the provisional fastening measuring part 1 (314). The provisional fastening measuring part 1 (314) and the fastening measuring part 1 (315) are semicircular grooves. The provisional fastening measuring part 1 (314) and the fastening measuring part 1 (315) are semicircular grooves having the same radius of curvature. There is a step 1 (316) between the provisional fastening measuring part 1 (314) and the fastening measuring part 1 (315). Based on the above step 1 (316), the part of the first body (311) where the above-mentioned joint measuring part 1 (314) is formed is thicker than the part of the first body (311) where the above-mentioned fastening measuring part 1 (315) is formed.

[0065] On the edge opposite to where the provisional fastening measuring part 1 (314) and fastening measuring part 1 (315) are formed, provisional fastening measuring part 2 (314') and fastening measuring part 2 (315') are positioned side by side. These provisional fastening measuring part 2 (314') and fastening measuring part 2 (315') have the same radius of curvature. However, the provisional fastening measuring part 1 (314) and provisional fastening measuring part 2 (314') have different radii of curvature. The fastening measuring part 1 (315) and fastening measuring part 2 (315') have different radii of curvature.

[0066] There is also a step (316') between the above-mentioned provisional fastening measuring part 2 (314') and the fastening measuring part 2 (315'). That is, the above-mentioned provisional fastening measuring part 2 (314') is formed in a part that is thicker than the above-mentioned fastening measuring part 2 (315').

[0067] There is also a difference in thickness in the portion where the above-mentioned provisional fastening measuring part 1 (314) and provisional fastening measuring part 2 (314') are formed. There is also a difference in thickness in the portion where the above-mentioned fastening measuring part 2 (315') and fastening measuring part 1 (315) are formed.

[0068] The second inspection hole (320) has a second body (321) that forms the exterior and frame. The second body (321) is also roughly rectangular in shape. A second hinge hole (321') is located at one end of the second body (321). The hinge pin (22) passes through the second hinge hole (321'). A second hanging groove (323) is located at a position adjacent to the second hinge hole (321'). As can be seen in FIG. 7, the second hanging groove (323) is created by cutting out the second body (321), and one inner surface may have a certain slope. The slope of one inner surface of the second hanging groove (323) is intended to avoid interference with the hanging wall (15) of the case (10).

[0069] At the other end of the second body (321), there is a provisional fastening measuring part (324) and a fastening measuring part (325). The fastening measuring part (325) is closer to the other end of the second body (321) than the provisional fastening measuring part (324). The provisional fastening measuring part (324) and the fastening measuring part (325) are formed into semicircular grooves. The provisional fastening measuring part (324) and the fastening measuring part (325) are formed into semicircular grooves having the same radius of curvature. There is a step (326) between the provisional fastening measuring part (324) and the fastening measuring part (325). Based on the step (326), the part of the second body (321) where the provisional fastening measuring part (324) is formed is thicker than the part of the second body (321) where the fastening measuring part (325) is formed. The above-mentioned temporary fastening measuring part (324) and fastening measuring part (325) can each surround about half of the outer surface of the pipe (60).

[0070] The third inspection hole (330) has a third body (331) that forms the exterior and frame. The third body (331) is approximately rectangular in shape. A third hinge hole (331') is located at one end of the third body (331). The hinge pin (22) passes through the third hinge hole (331'). A third hanging groove (333) is located adjacent to the third hinge hole (331'). As can be seen in FIG. 7, the third hanging groove (333) is created by cutting out the third body (331), and one inner surface may have a certain slope. The slope of one inner surface of the third hanging groove (333) is intended to avoid interference with the hanging wall (15) of the case (10).

[0071] At the other end of the third body (331), there is a provisional fastening measuring part (334) and a fastening measuring part (335). The fastening measuring part (335) is closer to the other end of the third body (331) than the provisional fastening measuring part (334). The provisional fastening measuring part (334) and the fastening measuring part (335) are formed into semicircular grooves. The provisional fastening measuring part (334) and the fastening measuring part (335) are formed into semicircular grooves having the same radius of curvature. There is a step (336) between the provisional fastening measuring part (334) and the fastening measuring part (335). Based on the step (336), the part of the third body (331) where the provisional fastening measuring part (334) is formed is thicker than the part of the third body (331) where the fastening measuring part (335) is formed.

[0072] The fourth inspection hole (340) has a fourth body (341) that forms the exterior and frame. The fourth body (341) is approximately rectangular in shape. A fourth hinge hole (341') ​​is located at one end of the fourth body (341). The hinge pin (22) passes through the fourth hinge hole (341'). A fourth hanging groove (343) is located adjacent to the fourth hinge hole (341'). As can be seen in FIG. 7, the fourth hanging groove (343) is formed by cutting out the first body (341), and one inner surface may have a certain slope. The slope of one inner surface of the fourth hanging groove (343) is intended to avoid interference with the hanging wall (15) of the case (10).

[0073] At the other end of the fourth body (341), there is a provisional fastening measuring part (344) and a fastening measuring part (345). The fastening measuring part (345) is closer to the other end of the fourth body (341) than the provisional fastening measuring part (344). The provisional fastening measuring part (344) and the fastening measuring part (345) are formed as partial circular grooves having a predetermined radius of curvature. The provisional fastening measuring part (344) and the fastening measuring part (345) are formed as semicircular grooves having the same radius of curvature. There is a step (346) between the provisional fastening measuring part (344) and the fastening measuring part (345). Based on the above step (346), the part of the fourth body (341) where the above-mentioned joint measuring part (344) is formed is thicker than the part of the fourth body (341) where the above-mentioned joint measuring part (345) is formed.

[0074] As can be seen in FIG. 7, the fastening measuring part (345) of the fourth inspection part (340) is smaller than a semicircle. That is, the provisional fastening measuring part (344) of the fourth inspection part (340) is approximately a semicircle, but the fastening measuring part (345) of the fourth inspection part (340) is slightly larger than a quarter circle. This is to make the length of the fourth inspection part (340) equal to that of the other inspection parts (310, 320, 330, 350). That is, because the sum of the radius of curvature of the provisional fastening measuring part (344) and the fastening measuring part (345) of the fourth inspection part (340) can be greater than the length of the fourth inspection part (340).

[0075] The fifth inspection hole (350) has a fifth body (351) that forms the exterior and frame. The fifth body (351) can also be roughly rectangular in shape overall. A fifth hinge hole (351') is located at one end of the fifth body (351). The hinge pin (22) passes through the fifth hinge hole (351'). A fifth hanging groove (353) is located at a position adjacent to the fifth hinge hole (351'). As can be seen in FIG. 7, the fifth hanging groove (353) is created by cutting out the fifth body (351), and one inner surface may have a certain slope. The slope of one inner surface of the fifth hanging groove (323) is intended to avoid interference with the hanging wall (15) of the case (10).

[0076] At the other end of the fifth body (351), there is a provisional fastening measuring part (354) and a fastening measuring part (355). The fastening measuring part (355) is closer to the other end of the fifth body (351) than the provisional fastening measuring part (354). The provisional fastening measuring part (354) is a partially circular groove, and the fastening measuring part (355) is a semicircular groove. The provisional fastening measuring part (354) and the fastening measuring part (355) have the same radius of curvature. There is a step (356) between the provisional fastening measuring part (354) and the fastening measuring part (355). Based on the step (356), the part of the fifth body (351) where the provisional fastening measuring part (354) is formed is thicker than the part of the fifth body (351) where the fastening measuring part (355) is formed.

[0077] As can be seen in FIG. 7, the fastening measuring portion (355) of the fifth inspection member (350) is smaller than a semicircle. That is, the provisional fastening measuring portion (354) of the fifth inspection member (350) is approximately a semicircle, but the fastening measuring portion (355) of the fifth inspection member (350) is slightly larger than a quarter circle. This is to make the length of the fifth inspection member (350) equal to that of the other inspection members (310, 320, 330, 340).

[0078] In the structure of the inspection device (30) described above, the thickness of the body (311, 321, 331, 341, 351) of the inspection device (30) in the part where the provisional fastening measuring part (314, 314', 324, 334, 344, 354) is formed is thicker than the thickness of the body (311, 321, 331, 341, 351) of the inspection device (30) in the part where the fastening measuring part (315, 315', 325, 335, 345, 355) is formed. This is to enable the provisional fastening state and the fastening state to be measured separately.

[0079] Meanwhile, the object to be measured using the inspection hole (30) and the measuring groove (17) of the present invention will be described with reference to FIGS. 9 and FIGS. 10.

[0080] A clamp (70) and a collar (80) are used to connect the pipe (60) and the fitting (50). First, the fitting body (52) forms the frame of the fitting (50). The fitting body (52) can have various shapes. For example, it can have a cuboid shape. A connecting hole (54) is formed through the fitting body (52). A fitting sealing part (55) is formed in the part corresponding to the inner side of the entrance of the connecting hole (54). The fitting sealing part (55) can be in the shape of a funnel. The configuration of the fitting sealing part (55) can be seen in FIGS. 9 and FIGS. 10.

[0081] There is a fastening hole (56) inside the fitting body (52). A gland (70), which will be described below, can be inserted and fastened into the fastening hole (56). The fastening hole (56) is connected to the connecting hole (54), and the end portion of the gland (70) and the pipe (60) can be positioned therein. A fitting screw portion (57) is formed on the inner surface of the fastening hole (56). The gland (70) can be fastened to the fitting screw portion (57).

[0082] A passageway (62) is formed inside the pipe (60). Gas flows through the passageway (62). The passageway (62) is connected to the passage hole (54) to transmit gas. A pipe thread (64) is formed in a predetermined section on the outer surface of the end portion of the pipe (60). The pipe thread (64) is connected to a collar (80) to be described below. A pipe sealing portion (66) is formed on the outer surface of the end portion of the pipe (60) to be in close contact with the inner surface of the fitting sealing portion (55). The angle of inclination formed by the pipe sealing portion (66) is formed to be smaller than the angle of inclination formed on the inner surface of the fitting sealing portion (55). By setting the angle of inclination in this way, the pipe sealing surface (66) can be in close contact with the inner surface of the fitting sealing surface (56).

[0083] The above gland (70) moves the pipe (60) into the fastening hole (56) of the fitting (50) so that the fitting sealing surface (55) and the pipe sealing surface (66) are in close contact. The above gland (70) moves the pipe (60) while being fastened to the fastening hole (56) of the fitting (50) by the force transmitted through the tool.

[0084] To this end, the gland (70) is made in a roughly cylindrical shape, and a tool coupling part (72) is provided on one side of the gland (70). In this embodiment, the tool coupling part (72) is shaped like a bolt head. A tool for tightening and loosening the gland (70) is coupled to the tool coupling part (72). A gland screw part (74) is provided around the outer surface of the remaining part of the gland (70), excluding the tool coupling part (72). The gland screw part (74) is coupled to a fitting screw part (57) formed on the inner surface of the fastening hole (56) of the fitting (50).

[0085] There is a hanging portion (77) on the inner surface of the cylindrical through hole penetrating the interior of the above-mentioned gland (70). One end of the collar (80), which will be described below, is hung on the hanging portion (77).

[0086] A collar (80) may be attached to the pipe thread (64) of the pipe (60). The collar (80) is cylindrical in shape. A collar thread (82) is formed on the inner surface of the collar (80). The collar thread (82) is connected to the pipe thread (64) of the pipe (60). Accordingly, the collar (80) is positioned adjacent to one end of the pipe (60).

[0087] The position where the collar (80) is mounted on the end of the pipe (60) can be checked using one of the measuring grooves (17) formed in the case (10). The end of the pipe (60) is positioned within the measuring groove (17) that matches the diameter of the pipe (60), and the collar (80) is seated on the reference surfaces (18) on both sides of the measuring groove (17).

[0088] And, when the collar (80) is connected to the pipe (60) and the collar (80) is positioned between the inner surface of the gland (70) and the outer surface of the pipe (60), the collar (60) moves together with the pipe (60) as the gland (70) rotates.

[0089] Meanwhile, the case (10) and the inspection device (30) may be made of a lightweight metal material. An example of the material for the case (10) and the inspection device (30) is an aluminum alloy. For example, the case (10) may use A6061 / Munsell No. 10B 3 / 5 among aluminum alloys, and the inspection device (30) may use A7075 / Munsell No. 10B 3 / 5 among aluminum alloys. Furthermore, an oxide layer (Al2O3) is formed on the surface of the case (10) and the inspection device (30) to increase corrosion resistance, wear resistance, and resistance to UV radiation. Due to the formation of such an oxide layer, the surface of the case (10) and the inspection device (30) becomes chemically very stable. In addition, the film thickness of the anodizing coating is 5 nanometers (nm), making it very thin and robust.

[0090] The following describes in detail how the inspection device for gas pipelines according to the present invention, having the configuration as described above, is used.

[0091] The inspection device of the present invention stores a plurality of inspection ports (30) within a case (10) and carries them, and when necessary, protrudes one of the inspection ports (30) out of the case (10) to check the extent to which the pipe (60) is connected to the fitting (50) by the gland (70).

[0092] And, before joining the pipe (60) and the fitting (50), the position of the collar (60) installed on the pipe (60) is also measured using the measuring groove (17) and reference surface (18) of the case (10).

[0093] To combine the pipe (60) and the fitting (50), the end of the pipe (60) is processed to form a pipe sealing part (66) and a pipe threaded part (64). A collar (80) is mounted on the pipe threaded part (64). The position where the collar (80) is mounted is verified by placing the pipe (60) with the collar (80) mounted in the measuring groove (17) of the case (10). The end of the pipe (60) must be positioned at the bottom of the measuring groove (17), and in this state, the collar (80) must be positioned on the reference surface (18). At this time, the pipe (60) must be positioned in the measuring groove (17) that matches the diameter of the pipe (60). Among the measuring grooves (17), the first measuring groove (171) is used for measuring pipes (60) with a relatively large diameter, and as one moves toward the fifth measuring groove (175), pipes (60) with progressively smaller diameters are used.

[0094] Next, a gland (70) is attached to the pipe (60) on which the collar (80) is installed, and the pipe (60) with the gland (70) attached is positioned in the fastening hole (56) of the fitting (50). The gland thread portion (74) of the gland (70) and the fitting thread portion (57) of the fastening hole (56) are partially fastened.

[0095] In this state, the inspection hole (30) is positioned within the measuring section (T) indicated in Fig. 10. To do this, an inspection hole (30) that fits the diameter of the pipe (60) must be selected. The inspection hole (30) that fits the diameter of the pipe (60) in the case (10) is rotated around the hinge assembly (20) so that a part of it protrudes outside the case (10).

[0096] Most of the inspection hole (30) protrudes outside the case (10), but the hanging grooves (313, 323, 333, 343, 353) are hung on the hanging wall (15). In this way, the case (10) and the inspection hole (30) protruding from the case (10) can be aligned in a straight line.

[0097] In this state, the operator holds the case (10) with their hand and performs an inspection using the inspection device (30). For example, if the gland (70) is in a state of being temporarily fastened to the fitting (50), the operator uses the temporary fastening measuring parts (314, 314', 324, 334, 344, 354) of the inspection device (30) to detect whether the temporary fastening state is accurate. That is, while placing the pipe (60) so that the inner surface of the temporary fastening measuring parts (314, 314', 324, 334, 344, 354) of the inspection device (30) surrounds the outer surface of the pipe (60), the operator checks whether the thickness of the part where the temporary fastening measuring parts (314, 314', 324, 334, 344, 354) are formed corresponds to the spacing of the measuring part (T).

[0098] Meanwhile, after the connection of the above-mentioned gland (70) is completed, the connection measuring part (315, 315', 325, 335, 345, 355) is used to detect whether the connection state is accurate. While placing the outer surface of the above-mentioned pipe (60) so that the inner surface of the connection measuring part (315, 315', 325, 335, 345, 355) of the inspection port (30) surrounds it, it is checked whether the thickness of the part where the connection measuring part (315, 315', 325, 335, 345, 355) is formed corresponds to the spacing of the measuring part (T).

[0099] In this way, the inspection hole (30) is used to detect whether the provisional and complete fastening states of the gland (70) are accurately established. After use, the inspection hole (30) is rotated around the hinge assembly (20) in the opposite direction relative to the case (10) so that it is stored between the case side walls (13). By doing so, multiple inspection holes (30) are positioned side by side in the space between the case side walls (13).

[0100] In the inspection section (30) of the present invention, the first inspection section (310) can detect four states, and the second inspection section (320) to the fifth inspection section (350) can each detect two states. Therefore, measurement for 12 cases is possible. In addition, there are five measurement grooves (17) in the case (10), so measurement for five cases regarding the degree to which the pipe (60) protrudes from the collar (80) is possible.

[0101] Although all components constituting an embodiment according to the present invention have been described as being combined or operating in combination, the present invention is not necessarily limited to such embodiments. That is, within the scope of the purpose of the present invention, all components may be selectively combined in one or more ways. Furthermore, terms such as "include," "constitute," or "have" described above, unless specifically stated otherwise, mean that the relevant component may be inherent; thus, they should be interpreted as allowing for the inclusion of additional components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. Terms commonly used, such as those defined in advance, should be interpreted in accordance with their meaning in the context of the relevant technology and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the present invention.

[0102] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

1. Case and, A hinge assembly having a hinge pin positioned across the interior of the above case, and An inspection device for gas pipelines comprising a plurality of inspection ports, each having a provisional connection measuring part and a connection measuring part, which rotate around the hinge pin to move in and out of the case and measure the connection status of the pipeline.

2. An inspection device for a gas pipeline according to claim 1, wherein the case comprises a case body, a case side wall formed extending in the longitudinal direction of the case body along the widthwise edge of the case body, and a hanging wall positioned between the case side walls and acting as a stopper when the inspection port is rotated to the outside of the case.

3. An inspection device for a gas pipeline according to claim 1, wherein the inspection hole comprises a plate-shaped body having a hinge hole formed on one side, a provisional fastening measuring part and a fastening measuring part formed along one edge of the body, and a hanging groove formed in the body portion adjacent to the hinge hole where the hanging wall is positioned.

4. An inspection device for a gas pipeline according to claim 3, wherein one inner surface of the hanging groove is formed as an inclined surface having a predetermined slope, and when the hanging wall is positioned in the hanging groove, the inspection port extends in the longitudinal direction of the case from the case.

5. In claim 3, the gas pipeline inspection device wherein the provisional fastening measuring part and the fastening measuring part have a groove shape having a predetermined radius of curvature.

6. A gas pipeline inspection device according to claim 5, wherein there is a step difference between the temporary joint measuring part and the fastening measuring part, so that the body part on which the fastening measuring part is formed has a smaller thickness than the body part on which the temporary fastening measuring part is formed.

7. In claim 6, the gas pipeline inspection device wherein the provisional fastening measuring part and the fastening measuring part are each formed along both edges in the width direction of the body.

8. In claim 5, the gas pipeline inspection device wherein the provisional fastening measuring part and the fastening measuring part are formed as a circle smaller than a semicircle.

9. In claim 3, a gas pipeline inspection device having a provisional fastening measuring part and a fastening measuring part formed sequentially along one edge of a single inspection port, having the same radius of curvature.

10. An inspection device for gas pipelines according to claim 1, wherein a plurality of measuring grooves are formed on the outer surface of the case having different depths and widths.

11. In claim 1, the case and inspection port are made of lightweight metal, forming an inspection device for gas pipelines.

12. In claim 11, the case and inspection port are made of aluminum alloy, forming a gas pipeline inspection device.

13. In claim 1, the inspection device for gas piping having a length such that the inspection port, which is equipped with a temporary fastening measuring part and a fastening measuring part, can be accommodated inside the case.

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