JPH04296293A - Joint part repairing method - Google Patents

Abstract

PURPOSE:To provide such a joint part repairing method that is operable speedily and favorably with simple tools and, what is more, in keeping fluid conveyance continued intact in a high-pressure/large diametral fluid conveying system. CONSTITUTION:A work unit mount 1 with a shutter 1a is attached to a joint 2, and a drill 3a of a boring machine 3 installed in this mount 1 bores a hole in the joint 2. Next, an injection unit 4 is installed in the mount 1 in place of the boring machine 3, and a sealant discharge pipe 4d with discharge holes N1, N2 dispersedly set up in response to upper ends A1, B1 and lower ends A2, B2 of a seal part of the joint 2 is inserted into an inner part of the joint 2, having it situated so as to make each discharge direction of these discharge holes N1, N2 face to these upper ends A1, B1 and lower ends A2, B2 of the seal part simultaneously, whereby a sealant is sprayed, and this sealant is pressurized into the seal part of the joint 2 by dint of fluid pressure from the inner part, then the hole of the joint 2 is constituted so as to be closed by a plug setter 6 installed instead of the injection unit 4.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a joint by injecting a liquid sealant into the seal of the joint.

0002

[Prior Art] Conventionally, in order to repair leaking parts of joints,
The entire joint is covered with a cover, and then a high-pressure sealant is injected into the cover to infiltrate the sealing part of the joint against the pressure of the transport fluid inside the joint, and , the sealant that had entered the leakage gap of the seal portion was hardened.

0003

[Problems to be Solved by the Invention] However, in order to sufficiently infiltrate the sealant into the entire seal portion, especially when the transport fluid is under high pressure conditions, it is necessary to create a considerably high pressure inside the cover. It needed to be strong enough to withstand high pressure. Furthermore, if the joint has a large diameter, it is also necessary to make the cover large. As a result, the labor of the workers who handle the above-mentioned large-scale equipment is great, and the work also takes a long time.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to inject liquid sealant into the seal portion of the joint, even if the transport fluid is at high pressure or the joint has a large diameter. The purpose of this invention is to enable repairs to be carried out quickly and efficiently using relatively simple tools.

[0005]

[Means for Solving the Problems] The characteristic means of the joint repair method according to the present invention is that a working equipment mounting base with a shutter is attached to the joint, and a drill of a drilling machine attached to the mounting base is opened when the shutter is opened. Insert it from the passage of the mount that has been opened, and with the mount and the drilling machine suppressing fluid ejection,
After drilling a hole in the joint with the drill and pulling out the drill from the mount, the shutter is closed and an injection device equipped with a sealant discharge pipe is attached to the mount in place of the drilling machine, Discharge holes for discharging sealant are provided in the sealant discharge pipe at two locations separated by a distance approximately equal to the distance between the upper end and the lower end of the seal portion in the longitudinal direction of the discharge pipe,
The sealant discharge pipe of the injection device is inserted into the joint from the passageway with the shutters opened and fluid ejection suppressed by the mounting base and the injection device. , the discharge hole is positioned such that the discharge direction thereof faces both the upper end portion and the lower end portion at the same time, and the sealant is supplied from the inside to the seal portion of the joint from the discharge hole, and the sealant is applied by fluid pressure. After pressurizing and infiltrating the seal portion of the joint and pulling out the discharge pipe from the mount, close the shutter, mount a plug mounting machine in place of the injection device on the mount, and close the shutter. and closing the hole of the joint with the plug mounting machine while suppressing fluid ejection with the mounting base and the plug mounting machine;
The present invention is constructed so that the mounting base and the plug mounting machine can be removed, and its effects are as follows.

[0006]

[Operation] In other words, a hole is formed in the joint while suppressing fluid ejection, and a discharge pipe inserted through the hole supplies sealant from the inner surface of the joint to the sealing part, and the sealant is applied to the sealing part by fluid pressure. Because pressure is applied to the mounting base, even if the fluid to be transported is at high pressure or the joint has a large diameter, it does not require a strong cover like the above-mentioned conventional technology and can be formed into a relatively simple mounting base. The work can be easily carried out using a drilling machine, an injection device, and a plug installation machine, and the sealing agent can be sufficiently infiltrated into the gap of the sealing part while fluid transport is continued, and a good repair can be achieved.

In particular, since the sealant from the discharge pipe is simultaneously supplied to the sealing part from the discharge holes located so as to face the upper and lower ends of the sealing part at the same time, there is sufficient supply to the lower end. This means that a sufficient amount of sealing agent is reliably supplied, and the lower end can be sufficiently sealed in a short period of time, which until now has been done only by flowing down the sealant supplied to the upper end.

[0008]

[Effects of the Invention] Therefore, by the characteristic means of the present invention, the seal portion of a joint can be repaired while fluid transport is continued and fluid leakage is sufficiently suppressed, and the seal portion can be repaired using relatively simple tools. We were able to establish a method for repairing joints that can be performed quickly and efficiently, and is particularly suitable for high-pressure and large-diameter fluid transport systems.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. As shown in FIG. 1, the joint 2 to be repaired includes a main body 2a, a pair of seal rings 2b, a pair of push rings 2c,
It consists of bolts and nuts 2d that apply a tightening force in the approaching direction to the push rings 2c, and pushes the seal ring 2b into a pair of narrow annular grooves formed between a fluid transport pipe P such as a gas pipe and the main body 2a. It is constructed so that the fluid transport pipe P and the main body 2a are connected in a sealed state by pushing in with a ring 2c. Here, the boundary between the fluid transport pipe P and the main body 2a on the inner surface side becomes seal parts A and B, and furthermore, the upper ends of seal parts A and B are A1 and B1, respectively, and the lower end is The parts are indicated by A2 and B2, respectively. Note that FIG. 1 shows a state in which a plug 7 for sealing the joint 2 is attached after the sealant 5 has been supplied to the seal portions A and B.

Next, the repair procedure will be explained. (1) As shown in FIG. 2, while fluid transport by the fluid transport pipe P continues, the working device mounting base 1 with the shutter 1a is attached to the upper part of the joint 2. Then, the mounting base 1
Insert the drill 3a of the drilling machine 3 attached to the hole through the passage 1b of the mounting base 1 with the shutter 1a open, and use the drill 3a to drill into the joint 2 while suppressing fluid ejection with the mounting base 1 and the drilling machine 3. .

(2) After pulling out the drill 3a from the mounting base 1 and closing the shutter 1a, as shown in FIG.
In place of the drilling machine 3, a sealing agent injection device 4 is installed on the mounting base 1.
Attach to. Here, the injection device 4 has a sealant discharge pipe 4d connected to a pressurized sealant supply device 4c inserted into the inside of a case 4a which can be attached to and detached from the mounting base 1 in an air-tight manner so as to be freely inserted and removed. , and the discharge pipe 4d is connected to the joint 2.
It is constructed so that it can be lowered to the bottom of the .

The structure of the discharge pipe 4d will be explained with reference to FIGS. 7 and 8. The distance between the upper ends A1, B1 and the lower ends A2, B2 of the seal portions A, B in the longitudinal direction of the pipe with a closed tip is Discharge holes N1 and N2 for discharging the sealant are distributed in advance at two locations spaced apart from each other by approximately the same distance as . Each of the discharge holes N1 and N2 includes three holes that face toward the seal portion A side and are oriented at 45 degrees to each other, and these three holes are located at a position rotated by 180 degrees and face the seal portion B side. It is made up of three holes that are oriented at 45 degrees to each other, six holes each (12 holes in total on the top and bottom). Further, the discharge direction of the upper discharge hole N1 is set to be within a range of 15 degrees downward from the horizontal direction, and the discharge direction of the lower discharge hole N2 is set to be within a range of 15 degrees upward from the horizontal direction.

(3) As shown in FIG. 4, the shutter 1a
is opened, and with fluid ejection suppressed by the mounting base 1 and the injection device 4, the discharge pipe 4d is inserted into the joint 2 from the passage 1b, and the discharge holes N1 and N2 are connected to the upper ends of the seal parts A and B, respectively. Positioning is performed in the vertical direction and circumferential direction so as to face A1, B1 and the lower end portions A2, B2. And the discharge hole N
1, the sealant 5 is injected from N2 toward the seal portions A and B. At this time, the upper end portion A is
A part of the sealant 5 injected onto B1 is supplied to the entire circumference of the seal portions A and B due to its own weight, and reaches the lower end A2.
, B2, and the lower end portion A2,
Together with the sealant 5 sprayed onto B2, the lower end A2,
Supply a sufficient amount of sealant 5 at B2. Further, the sealant 5 supplied to the seal parts A and B is pressurized and infiltrated into the gap between the seal parts A and B from the inside by fluid pressure.

The sealant 5 may be made of organic materials such as thermoplastic, thermosetting, room temperature curing, moisture curing, or two-component reactive resins, or inorganic materials such as water glass or cement. Select as appropriate.

(4) As shown in FIG. 5, after the discharge pipe 4d is pulled out from the mounting base 1, the shutter 1a is closed and the plug mounting device 6 is mounted on the mounting base 1 in place of the injection device 4.

(5) As shown in FIG. 6, the shutter 1a
is opened, and with the fluid ejection suppressed by the mounting base 1 and the plug mounting machine 6, the plug 7 is attached to the lower end of the arm 6a of the plug mounting machine 6, and thereby the hole periphery of the joint 2 is threaded. Close the hole with plug 7. Then, only the arm 6a is pulled upward, the shutter 1a is closed, and finally the mounting base 1 and the plug mounting machine 6 are removed from the joint 2.

[Another Embodiment] The configuration of the discharge holes N1 and N2 for discharging the sealant includes the number of holes, the size of the holes, and the angle facing the seal portion (in the vertical direction). and circumferential direction) etc. can be changed as appropriate. For example, the number and size of the discharge holes N1 facing the upper ends A1, B1 of the seal parts A, B may be different from the number and size of the discharge holes N1 facing the lower ends A2, B2.
By making the amount larger than that of No. 2, it is possible to increase the amount of supply to the upper end portions A1 and B1.

Further, the shape of the discharge pipe 4d is not limited to the linear shape described in the above embodiment, but for example, as shown in FIG.
The pipe may be bent in the longitudinal direction, and the discharge holes N1 and N2 for discharging the sealant may be provided on one side in the circumferential direction of the pipe. In this case, first, the sealant 5 is injected and supplied toward the seal part A on one side, and then the discharge pipe 4d is rotated 180 degrees in the circumferential direction, and the sealant 5 is also injected and supplied to the seal part B on the opposite side. Therefore, the sealant 5 can be more accurately supplied from a position closer to the seal portions A and B.

Further, the specific configuration of the mounting base 1, the drilling machine 3, the injection device 4, and the plug mounting machine 6 may be any structure as long as it can perform the desired work while suppressing the fluid jetting out. It can be changed appropriately.

Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Figure 1] Partially cutaway front view of the joint

[Figure 2] Conceptual diagram of construction procedure part 1

[Figure 3] Same part 2

[Figure 4] Same part 3

[Figure 5] Same part 4

[Figure 6] Same part 5

[Figure 7] Front view of the discharge pipe for discharging sealant

[Figure 8] Cross-sectional view of the same plane

[Fig. 9] Conceptual diagram showing another embodiment of a discharge pipe for discharging sealant.

[Explanation of symbols]

1 Mounting base for work equipment 1a
Shutter 1b Passage 2 Joint 3 Perforator 3a Drill 4 Injector 4d Sealant discharge pipe 5
Sealing agent 6 Plug mounting machine A, B Seal part A1, B1 Upper end part A2, B2 Lower end part N1, N2 Discharge hole

Claims (1)

[Claims] [Claim 1] Seal parts (A), (B) of joint (2)
A joint repair method in which a liquid sealant (5) is injected into the joint (2), and a work equipment mount (1) with a shutter (1a) is attached to the joint (2), and the work equipment is mounted on the mount (1). The drill (3a) of the drilled drilling machine (3) is inserted into the passageway (1b) of the mount (1) with the shutter (1a) opened.
), insert the drill (3a) into the joint (2) with the drill (3a) while suppressing fluid ejection with the mounting base (1) and the drilling machine (3), and insert the drill (3a) into the mounting base ( 1) After pulling it out from the shutter (1a
) is closed, and the injection device (4) equipped with a sealant discharge pipe (4d) in place of the perforator (3) is attached to the mounting base (
1), and the upper ends (A) of the seal parts (A) and (B) are attached to the sealant discharge pipe (4d) in the longitudinal direction
1) Discharge holes (N1) and (N2) for discharging the sealant are distributed in advance at two locations separated by a distance approximately equal to the distance between (B1) and the lower end portions (A2) and (B2), respectively. Keep it
With the shutter (1a) open and fluid ejection suppressed by the mounting base (1) and the injection device (4), the sealant discharge pipe (4d) of the injection device (4) is connected to the passageway (1b). ) into the inside of the joint (2) so that the discharge directions of the discharge holes (N1) and (N2) are aligned with the upper ends (A1) and (B1) and the lower ends (A2) and (B2), respectively. The discharge holes (N1) and (N
2) supplies the sealant (5) from the inside to the seal parts (A) and (B) of the joint (2), and the sealant (5) is applied to the seal part of the joint (2) by fluid pressure. (A) and (B), and after pulling out the discharge pipe (4d) from the mounting base (1), the shutter (
1a), attach the plug attachment machine (6) to the mount (1) in place of the injection device (4), open the shutter (1a), and connect the mount (1) and the plug attachment machine. (6) closes the hole of the joint (2) with the plug fitting machine (6) while suppressing fluid ejection;
A method for repairing a joint by removing the mounting base (1) and the plug mounting machine (6).