Pipe joint installation inspection device

Abstract

To provide a construction confirmation device of a pipe joint which can support a long-length operation shaft, and can join a succeeding pipe to a preceding pipe by making it easily approach the preceding pipe.SOLUTION: An operation shaft 14 extending toward a rear side in a pipe axial direction is connected a bogie 11 having a camera 12 for confirming an attachment state of a rubber ring 3 from a pipe inner face, and a light source 13, and a rolling support body 16 and a centerfold columnar support 17 are arranged at the operation shaft 14. At the outside of a preceding pipe P which has accepted the bogie 11, the operation shaft 14 is supported by the centerfold columnar support 17 which is in an erected state, the rolling support body 16 intrudes into the succeeding pipe P accompanied by the approach of the succeeding pipe P to the preceding pipe P, succeedingly, the centerfold columnar support 17 intrudes into the succeeding pipe P in a folded state while oscillating by being pushed to one end part of the succeeding pipe P, also in the succeeding pipe P, the operation shaft 14 is supported by the rolling support body 16 having a traveling wheel 16a, and the camera 12 is located at a joint part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This invention relates to a device for checking whether a rubber ring is fitted in a specified position when joining a pipe joint. [Background technology]

[0002] Ductile iron pipes are mainly buried underground as water pipes, sewer pipes, gas pipes, etc., and form pipelines, and the pipes are joined together using a joint type in which the spigot is inserted into the socket. As for joints, in addition to the K type, which is called a mechanical type, in which the spigot is inserted into the socket, a rubber ring to achieve a tight seal is pressed into the gap between the socket and the socket with a push ring, and then tightened with a bolt, there are also other types called push-on types, such as the GX type, T type, and PII type, which have a rubber ring attached to the inner surface of the socket beforehand, and can be easily joined by simply inserting the spigot into the socket.

[0003] As an example, the joining process of a water pipe P equipped with a T-shaped joint will be described with reference to Fig. 9. In this joining, as shown in Fig. 9(a), the heel portion 3a of the rubber ring 3 is fitted in advance into the groove portion 1a on the inner peripheral surface of the socket 1 of the preceding pipe P, and a lubricant is applied to the outer peripheral surface of the end of the insertion port 2 of the following pipe P and the inner peripheral surface of the rubber ring 3. Next, as shown in Fig. 9(b), the insertion port 2 of the following pipe P is inserted into the socket 1, and accordingly, as shown in Fig. 9(c), the valve portion 3b of the rubber ring 3 is compressed and sandwiched between the inner peripheral surface of the socket 1 of the preceding pipe P on the back side of the groove portion 1a and the outer peripheral surface of the insertion port 2 of the following pipe P.

[0004] Here, if the heel portion 3a of the rubber ring 3 is not properly fitted into the groove portion 1a on the inner peripheral surface of the receiving port 1, the rubber ring 3 may become misaligned, damaged, or scratched when the joint is joined, resulting in a malfunction in the watertight performance. Such malfunctions are relatively easy to confirm from inside the pipe P, but if the pipe diameter is less than 700 mm, it is impossible for a person to enter the pipe.

[0005] As a countermeasure to this problem, as shown in Figure 10(a), a method is known in which, after the joint is joined, an inspection tool called a thin plate gauge 30 is inserted into the gap between the receiving port 1 and the insertion port 2 from the end face side of the receiving port 1 on the outside of the pipe P to check the position of the rubber ring 3, and this operation is carried out around the entire circumference of the joint part of the pipe P as shown in Figure 10(b) (see Patent Document 1 below (

[0052] , Figure 7(a)) as prior art to the same effect).

[0006] However, for example, when the distance between the pipe P and the wall surface is narrow, or when the distance between adjacent pipes P is narrow, it is difficult to perform the above-mentioned inspection method from outside the pipe P, and there is a problem that it is not easy to determine whether the rubber ring 3 is properly attached.

[0007] Furthermore, in an earthquake-resistant joint that prevents the insertion port 2 from coming off the receiving port 1 with a lock ring located further back than the rubber ring 3, if an abnormality is discovered in the installation of the rubber ring 3, there was a problem that extremely complicated dismantling work would be required to redo the installation. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2012-123589 A Summary of the Invention [Problem to be solved by the invention]

[0009] In order to deal with such problems, the applicant has proposed a pipe joint installation inspection device as shown in Fig. 11. This installation inspection device is equipped with a camera 12 and a light source 13 on a cart 11 that is movable inside a pipe P along the pipe axial direction, a long operating shaft 14 for movement is connected to the cart 11 via a socket 15 that is connected to a holder for the camera 12, and a rolling support 16 is provided on the operating shaft 14, the lower end of which is equipped with running wheels 16a that roll on the inside bottom surface of the pipe P, and inside the pipe P, the operating shaft 14 is supported by the rolling support 16.

[0010] When using this pipe fitting construction inspection device, the camera 12 is inserted inside the pipe P and positioned on the receiving port 1 side of the end face of the fitting's insertion port 2, and the rubber ring 3 being sandwiched between the receiving port 1 and the insertion port 2 inside the pipe P is illuminated by the light source 13 and photographed by the camera 12. The image is then displayed on a monitor M outside the pipe P, and the behavior of the rubber ring 3 as the insertion port 2 is inserted into the receiving port 1 can be confirmed on the monitor M.

[0011] In this construction process, as shown in Figure 12, the trolley 11 is first deposited inside the previously installed pipe P through the receiving port 1, which serves as the joint, with the operating shaft 14 protruding from the preceding pipe P by approximately the length of the new subsequent pipe P to be joined, and after the subsequent pipe P is joined, the trolley 11 is pulled back to the vicinity of the receiving port 1.

[0012] When the above-mentioned method is adopted, the following pipe P needs to approach the preceding pipe P while taking in the operating shaft 14 inside the pipe. In order to prevent the bending of the long operating shaft 14 due to its own weight from becoming too large and interfering with the connection of the pipe P, the operating shaft 14 needs to be supported manually, hung by a crane, or supported by a temporary support stand 31 as shown in the figure. When supported by the temporary support stand 31, the temporary support stand 31 needs to be removed when the end of the operating shaft 14 enters the following pipe P, and these operations require a great deal of labor and time.

[0013] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a pipe joint construction inspection device that supports a long operating shaft and can easily bring a subsequent pipe close to a preceding pipe for jointing. [Means for solving the problem]

[0014] In order to solve the above problems, the present invention provides a pipe joint installation inspection device that includes a cart that moves inside a pipe along the pipe axis direction, a camera and a light source that inspect the installation status of a sealing rubber ring from the inside of the pipe, and an operating shaft that extends rearward in the pipe axis direction and is connected to the cart, A rolling support having a running wheel is provided at a position away from the carriage on the operating shaft, and a pivotable center support is provided at a position closer to the carriage than the rolling support, Outside the preceding pipe where the dolly is deposited, the lower end of the center-folding support pillar in the upright state is grounded on the ground, and the operating shaft protruding from the preceding pipe is supported by the center-folding support pillar, As the trailing tube approaches the leading tube, the rolling support enters the trailing tube, and then the folding support is pushed by one end of the trailing tube and swings while entering the trailing tube in a folded state; Inside the following tube, the operating shaft is supported by the rolling support, the running wheels of the rolling support roll on the inside bottom surface of the tube, the folding support is maintained in a folded state, and the rear end of the operating shaft reaches the other end side of the following tube.

[0015] Also, the rolling support is attached to the operating shaft so as to be able to swing freely around the axis of the operating shaft.

[0016] The folding support pillar has a landing wheel at the lower end of the pillar portion extending in the vertical direction, The landing wheels contact the ground outside the leading pipe, roll on the ground as the folding support sways, and inside the trailing pipe, roll on the inner bottom surface of the pipe.

[0017] The center folding support is connected to a base member attached to the operation shaft via a horizontal hinge shaft perpendicular to the axis of the operation shaft, At the connection between the folding support and the base member, a guide curved surface is formed on one side of the connecting piece of the base member to allow the folding support to swing, and a stopper surface is formed at the bottom to abut against the receiving surface of the folding support and prevent the folding support from swinging.

[0018] In addition, a protective material is attached to the center bending support at a portion that is pressed by the end surface of the trailing tube as the trailing tube approaches the leading tube.

[0019] In addition, a weight is attached to the lower part of the center-folding support pillar, and the weight of the weight applies a rotational force to the center-folding support pillar toward the following tube.

[0020] The operating shaft is provided with a guide jig which tapers towards the rear end, and this guide jig guides the operating shaft so as not to become eccentric from the widthwise centre inside the subsequent tube as the subsequent tube approaches the preceding tube. Effect of the Invention

[0021] When joining pipes using the pipe joint construction inspection device of this invention, the operating shaft connected to the trolley and protruding from the leading pipe is supported by the folding support pillar in an upright position outside the pipe, and as the trailing pipe approaches the leading pipe, the folding support pillar is pushed by one end of the trailing pipe and swings while entering the interior of the trailing pipe in a folded state, where it is supported by a rolling support, making it possible to move the trolley from the other end side of the trailing pipe.

[0022] This allows a camera to be positioned to check the installation status of the rubber ring at the joint without having to manually support the operating shaft, suspend it with a crane, support it on a temporary support stand, or remove the temporary support stand, thus reducing the labor required for checking the installation of pipe joints. In addition, bending of the operating shaft is suppressed, and the phenomenon of the operating shaft scratching the paint on the inner surface of the pipe is also prevented. [Brief description of the drawings]

[0023] [Figure 1] 1A is a schematic side view showing a state in which an operating shaft is supported by a bending support pillar in an upright position, a state in which the bending support pillar is pushed by a following pipe and swung, and a state in which the operating shaft is supported by a rolling support, during pipe joining of a pipe joint construction inspection device according to the present invention. [Diagram 2] FIG. 11 is a side view showing a state in which the rolling support and the center folding support are attached to the operating shaft in the pipe joint installation inspection device of the same embodiment; [Diagram 3]FIG. 2A is a rear end view and FIG. 2B is a side view showing the mounting structure of the rolling support body of the same [Figure 4] (a) rear end view and (b) side view showing the mounting structure of the center-folding support pillar of the same [Diagram 5] FIG. 11 is a side view showing a state in which the center-folding support is tilted to the opposite side to the traveling direction of the following tube due to the clearance between the receiving surface of the center-folding support and the stopper surface of the base member. [Figure 6] FIG. 11 is a side view showing a state in which a rotational force is applied to the center folding support by the weight of the same; [Figure 7] FIG. 2 is an end view showing the rolling support from the rear in a following pipe approaching a preceding pipe in the same embodiment, in which (a) the operating shaft is eccentric from the center of the pipe in the width direction, and (b) the operating shaft is located at the center of the pipe in the width direction. [Figure 8] FIG. 2 is a plan view and a side view showing the construction inspection device for a pipe joint equipped with the above-mentioned guide jig. [Figure 9] Partial cross-sectional views in the axial direction of a T-joint showing (a) the initial joining process, (b) the intermediate joining process, and (c) the joined state. [Figure 10] (a) Partial cross-sectional view in the pipe axial direction, (b) Full-circumference cross-sectional view in the pipe diameter direction at position AA in (a) explaining the method for checking joints after joining using a thin plate gauge [Figure 11] FIG. 1 is a side view showing a cart equipped with a camera and a light source for a pipe joint construction inspection device and an operating axis in the vicinity thereof; [Figure 12] A side view showing a process of bringing a succeeding tube closer to a preceding tube while temporarily supporting the operating shaft so as not to bend. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

[0025] Here, when performing the joining operation of the pipe P shown in Figure 1, the direction in which the subsequent pipe P to be newly joined advances relative to the previously installed pipe P is defined as the front, and the opposite side is defined as the rear.

[0026] Also, the case where the socket 1 and insertion port 2 of a pipe P equipped with a push-on type T-joint are joined is illustrated (see FIG. 9), but the same can be said for push-on type earthquake-resistant joints (GX type and PII type) equipped with a lock ring. When joining this joint, the heel portion 3a of the rubber ring 3 is fitted in advance into the groove portion 1a on the inner peripheral surface of the socket 1.

[0027] 1 and 2, this pipe joint construction inspection device, like that shown in Fig. 11, is equipped with a spherical camera with a 360° angle of view as camera 12 for photographing rubber ring 3, mounted on a mobile dolly 11, and also equipped with a light source 13 for illuminating the subject. A long operating shaft 14 is connected to dolly 11 so as to extend rearward via socket 15 which is connected to the holder of camera 12.

[0028] A rolling support 16 is provided near the rear end of the operating shaft 14, and a center folding support 17 is provided in front of the rolling support 16. The center folding support 17 extends downward further than the rolling support 16.

[0029] 3, the rolling support 16 has a pair of running wheels 16a held in a downwardly spreading manner on a mounting portion 16b, and is attached to the operating shaft 14 via a mounting shaft 19 extending downward from a base member 18 inserted through the operating shaft 14. The base member 18 is fixed in the axial direction to the operating shaft 14 by bolts 20 screwed in from above and both sides.

[0030] Here, the rolling support 16 may be attached to the operating shaft 14 using a set collar or the like so as to be able to swing freely around the axis of the operating shaft 14 (see the arrow in FIG. 3(a)).

[0031] As shown in FIG. 4, the folding support pillar 17 has a pair of landing wheels 17a at the lower end of a pillar portion extending in the vertical direction, and is attached to the operating shaft 14 via a base member 21 inserted through the operating shaft 14.

[0032] A connecting piece 22 protruding downward is provided on the base member 21, and a horizontal hinge shaft 23 perpendicular to the axis of the operating shaft 14 passes through the bifurcated upper end of the folding support pillar 17 and the connecting piece 22 sandwiched therebetween, allowing the folding support pillar 17 to swing relative to the base member 21. The base member 21 is fixed axially and circumferentially to the operating shaft 14 by bolts 24 screwed in from above and on both sides.

[0033] The connecting piece 22 of the base member 21 is formed with an arc-shaped guide curved surface 22a extending downward from the front side surface, and a flat stopper surface 22b is formed on the lower surface. A flat receiving surface 17b is formed on the upper portion of the center folding support 17, facing the lower side of the stopper surface 22b. The guide curved surface 22a allows the center folding support 17 to swing, and the stopper surface 22b abuts against the receiving surface 17b to prevent the center folding support 17 from swinging.

[0034] Further, a protective material 25 made of elastic resin is attached to the rear side surface of the center-folding support pillar 17, which is opposite to the guide curved surface 22a.

[0035] In addition, in the folding support 17, the landing wheels 17a may be omitted, and the lower end of the column portion of the folding support 17 may be processed into a shape that allows sliding on the ground and the inner surface of the pipe P.

[0036] To use the pipe fitting construction inspection device as described above to check whether the rubber ring 3 previously attached to the inner surface of the receiving port 1 is installed in the specified position when joining a pipe P, as shown in Figure 9, a trolley 11 is inserted into the inside of the previously installed pipe P through the receiving port 1, and the operating shaft 14 is left protruding rearward from the preceding pipe P by approximately the length of the new succeeding pipe P to be joined, as shown in Figure 1(a).

[0037] In this state, the folding support pillar 17 is in an upright position outside the leading pipe P, the landing wheel 17a at the lower end of the folding support pillar 17 is in contact with the ground, the folding support pillar 17 supports the operating shaft 14, and deflection of the operating shaft 14 due to its own weight is suppressed.

[0038] Next, as shown in FIG. 1(b), when the insertion port 2 of the following pipe P is brought close to the receiving port 1 of the preceding pipe P, the rolling support 16 enters the interior of the following pipe P, the running wheels 16a ride up onto the inner bottom surface of the following pipe P, and the rear end side of the operating shaft 14 becomes supported. Following this, the folding support 17 is pushed by the end surface of the insertion port 2 of the following pipe P and swings as if it is falling over, and enters the interior of the following pipe P in a folded state.

[0039] At this time, a protective material 25 made of elastic resin is attached to the center folding support 17 at the portion that is pressed by the end surface of the insertion port 2 of the following pipe P, thereby preventing damage to the center folding support 17 and protecting the paint on the end surface of the insertion port 2 of the following pipe P.

[0040] Then, when the trailing pipe P is brought even closer to the leading pipe P, the running wheels 16a of the rolling support 16 roll on the inner bottom surface of the trailing pipe P, and with the operating shaft 14 supported by the rolling support 16, the insertion port 2 of the trailing pipe P can be inserted into the receiving port 1 of the leading pipe P, and the rear end of the operating shaft 14 is positioned near the receiving port 1 of the trailing pipe P.

[0041] This allows the operating shaft 14 to be pulled from the receiving port 1 side of the trailing pipe P to pull the trolley 11 back to the vicinity of the receiving port 1 of the leading pipe P, making it easy to position the camera 12 for checking the attachment status of the rubber ring 3 on the inner surface of the joint.

[0042] In addition, when the following pipe P is brought close to the preceding pipe P, the operating shaft 14 is supported by the center folding support 17 or the rolling support 16, so that the bending of the operating shaft 14 is suppressed, and since the running wheels 16a and the landing wheels 17a roll on the inner bottom surface of the following pipe P, the phenomenon of the operating shaft 14 scratching the paint on the inner surface of the pipe P due to contact scratches is also prevented.

[0043] Furthermore, as shown in FIG. 4, when the folding support 17 is suspended vertically and a gap of about 2 mm is provided between the receiving surface 17b and the stopper surface 22b, when the landing wheel 17a is in contact with the ground due to the weight of the operating shaft 14, the lower end of the folding support 17 will tilt backward, in the opposite direction to the movement of the following tube P, as shown in FIG.

[0044] This prevents the folding support column 17 from accidentally swinging in a direction that causes it to fall over when the operating shaft 14 is supported by the folding support column 17.

[0045] Furthermore, as shown in FIG. 6, if a weight 26 made of steel or the like is attached to the front side of the folding support 17 to apply a rotational force in the opposite direction to the folding direction, the folding support 17 can be more reliably prevented from accidentally falling over. In addition, when the operating shaft 14 is protruded from the tube P, the folding support 17 can be quickly swung from the folded state to the upright state.

[0046] In addition, when bending and joining a pipe P within the tolerance of the joint, when a following pipe P approaches a preceding pipe P, as shown in Figure 7(a), the operating axis 14 may become offset from the center of the width of the pipe P, which may cause problems in checking the construction status of the joint and in the progress of the trolley 11.

[0047] To prevent this from happening, as shown in Figure 8, a triangular plate-shaped guide jig 27 that tapers toward the rear end is provided near the rear end of the operating shaft 14.As the following tube P approaches the preceding tube P, the guide jig 27 inserted into the following tube P is restricted by the inner surfaces on both sides of the tube P, so that the operating shaft 14 is guided without being offset from the center of the width of the tube P, as shown in Figure 7(b).

[0048] Incidentally, in the above embodiment, as shown in Figure 1, an example of a construction procedure is shown in which a subsequent pipe P is suspended and brought close to a preceding pipe P using an open cut method that digs down from the ground surface. However, this pipe joint construction inspection device can also be used in a similar manner in cases where a subsequent pipe P is placed on a cart inside a tunnel and brought close to a preceding pipe P. [Explanation of symbols]

[0049] 1 socket 1a Groove 2 Insertion port 3. Rubber ring 3a Heel 3b Valve section 11 Trolley 12 Camera 13 Light source 14 Operation axis 15 Sockets 16 Rolling support 16a Running wheels 16b Mounting part 17 Half-fold strut 17a Landing wheels 17b Uke surface 18 Base material 19 Mounting shaft 20 Volts 21 Base material 22 Connecting piece 22a Guide surface 22b Stopper surface 23 Hinge axis 24 Volts 25 Protective Materials 26 weight 27 Guide fixture P tube

Claims

1. The device for inspecting pipe joints is provided with a cart (11) that moves inside a pipe (P) along the pipe axis direction, a camera (12) that inspects the installation status of a sealing rubber ring (3) from the inside of the pipe, and a light source (13), and is connected to an operating shaft (14) for movement that extends rearward in the pipe axis direction. A rolling support (16) having a running wheel (16a) is provided at a position away from the carriage (11) on the operating shaft (14), and a pivotable center-folding support (17) is provided at a position closer to the carriage (11) than the rolling support (16), Outside the preceding pipe (P) into which the dolly (11) has been deposited, the lower end of the center-folding support (17) in an upright state is in contact with the ground, and the center-folding support (17) supports the operating shaft (14) protruding from the preceding pipe (P). As the following tube (P) approaches the preceding tube (P), the rolling support (16) enters the following tube (P), and then the folding support (17) is pushed by one end of the following tube (P) and swings while entering the following tube (P) in a folded state; The device for inspecting a pipe joint is characterized in that inside the following pipe (P), the operating shaft (14) is supported by the rolling support (16), the running wheels (16a) of the rolling support (16) roll on the inside bottom surface of the pipe (P), the folding support (17) is maintained in a folded state, and the rear end of the operating shaft (14) reaches the other end side of the following pipe (P).

2. 2. The pipe joint installation inspection device according to claim 1, wherein the rolling support (16) is attached to the operating shaft (14) so ​​as to be freely swingable about the axis of the operating shaft (14).

3. The folding support (17) has a landing wheel (17a) at the lower end of a vertically extending pillar portion, The construction inspection device for pipe joints as described in claim 1, characterized in that the landing wheel (17a) contacts the ground outside the leading pipe (P), rolls on the ground as the folding support (17) swings, and rolls on the inner bottom surface of the following pipe (P) inside the following pipe (P).

4. The center folding support (17) is connected to a base member (21) attached to the operating shaft (14) via a horizontal hinge shaft (23) perpendicular to the axis of the operating shaft (14), The pipe joint installation inspection device according to claim 1, characterized in that at the connection portion between the center folding support (17) and the base member (21), a guide curved surface (22a) that allows the center folding support (17) to swing is formed on one side of the connecting piece (22) of the base member (21), and a stopper surface (22b) that abuts against a receiving surface (17b) of the center folding support (17) to prevent the center folding support (17) from swinging is formed at the lower part.

5. The pipe joint installation inspection device according to claim 1, characterized in that a protective material (25) is attached to the center bending support (17) at a portion that is pressed by the end surface of the subsequent pipe (P) as the subsequent pipe (P) approaches the preceding pipe (P).

6. The pipe joint installation inspection device according to claim 1, characterized in that a weight (26) is attached to the lower part of the bending support (17), and the weight of the weight (26) applies a rotational force to the bending support (17) toward the following pipe (P).

7. The pipe joint construction inspection device according to claim 1, characterized in that the operating shaft (14) is provided with a guide jig (27) that tapers toward the rear end, and the guide jig (27) guides the operating shaft (14) so ​​as not to become eccentric from the center in the width direction inside the subsequent pipe (P) as the subsequent pipe (P) approaches the preceding pipe (P).

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