TW201506295A - Pipe-inside patch joint - Google Patents

Abstract

This invention relates to a pipe-inside patch joint that liquid-tightly connects an one-side of a pipe body and an other-side of a pipe body and comprises a main gum ring arranged from the inner face of the one-side of the pipe body to the inner face of other-side of the pipe body; a one-side aid-gum ring interposed between the inner face of the one-side of the pipe body and the main gum ring; an other-side aid-gum ring, interposed between the inner face of the other-side of the pipe body and the main gum ring; a one-side expansion band, arranged on the inner face of the one-side of the pipe body of the main gum ring, so as to press the main gum ring onto the inner face of the one-side of the pipe body; and an other-side expansion band arranged on the inner face of the other-side of the pipe body of the main gum ring, so as to press the main gum ring onto the inner face of the other-side of the pipe body.

Description

Inner tube joint

The present invention relates to a pipe inner face repair joint for repairing a pipe joint portion of a pipe from an inner surface side of a pipe.

In general, pipes for agricultural water, industrial water, tap water, and the like include pipes made of polycarbonate (PC) pipes or steel pipes. The pipe body is disposed in a groove excavated on the ground, and the pipe bodies are connected to each other by a pipe joint portion. Then, the pipe (pipe body) is buried in the ground by filling the groove with soil.

Pipes buried in the ground may leak at the pipe joints due to long-term use. When a leak occurs in the pipe joint portion of the pipe, it is necessary to repair the pipe joint portion of the pipe in order to stop the leakage of the pipe joint portion of the pipe.

In order to perform such repair, the following in-tube repair joint has been developed: a rubber ring is disposed on the inner surface of the leak portion of the pipe joint portion, and an expansion band is disposed on the inner surface of the rubber ring. Thus, the rubber ring is press-fitted to the inner surface of the pipe body (Japanese Patent Laid-Open No. Hei 2-295478). Such a pipe inner face repair joint can be used in the case where the pipe diameter of the pipe buried in the ground is a large diameter to the extent that the operator can enter the inside of the pipe body. That is, the operator enters the inside of the tube and configures the rubber ring. The inner surface of the leakage portion of the pipe joint portion is disposed on the inner surface of the rubber ring, and the rubber ring is pressed and fixed to the inner surface of the pipe body, thereby causing leakage of the pipe joint portion. repair.

As shown in FIG. 5 and FIG. 6, the inner surface repair joint includes: a rubber ring 2 disposed to be bridged with the inner faces of the end portions 1a, 1a of the pipe bodies 1, 1 to be connected; and an expansion band Bands 3 and 3 are disposed on the respective inner faces of both end portions of the rubber ring 2. Each of the extension bands 3 includes a plurality of arc-shaped segments 3a, and a locking claw portion 5 formed at an end portion 4 of each of the arc-shaped segments 3a to be locked to other corresponding arcs The end 4 of the section 3a. Further, a spacer 6 is also interposed between the end portions 4 and 4 of the arc-shaped segments 3a and 3a adjacent to each other.

Further, as shown in Fig. 7, at the end of each of the arc-shaped segments 3a, a cylinder 7a for operating a cylinder 7 and a locking opening 8 engageable by a piston 7b are formed. When the cylinder tube 7a and the piston 7b of the cylinder tube 7 are engaged with the locking openings 8 and 8 provided in the arcuate sections 3a and 3a adjacent to each other, by operating the cylinder 7, the cylinder 7 can be operated. The arcuate sections 3a and 3a adjacent to each other are urged in a direction away from each other. Then, by inserting the spacers 6 between the end portions 4 and 4 of the arcuate sections 3a and 3a adjacent to each other, the arcuate sections 3a and 3a can be maintained in a state of being separated from each other, that is, The state in which the arc-shaped sections 3a and 3a are fastened to the rubber ring 2 can be maintained.

However, in the above-mentioned pipe inner surface repair joint, the inner surface state of the pipe is in various states due to long-term use, and on the other hand, it is difficult to change the spacer 6 Therefore, it is difficult to fix the degree of fastening and fixing of each of the arcuate segments 3a with respect to the rubber ring 2, and as a result, the effect of preventing leakage may not be sufficiently obtained.

Further, in the in-pipe surface repair joint, the inner surface state of the pipe is in various states due to long-term use, and on the other hand, the rubber ring 2 having a predetermined strength is required to be directly disposed on the inner surface of the pipe. The rubber ring 2 is insufficient in flexibility, and as a result, the sealing performance to the inner surface of the pipe may not be sufficiently obtained, and the effect of preventing leakage may not be sufficiently obtained.

The present invention has been made in view of the above problems and has been invented to effectively solve the problem. It is an object of the present invention to provide an inner surface repair joint which can significantly improve leakage prevention.

The invention relates to an inner surface repair joint of a pipe, which is connected to the other side pipe body in a liquid-tight manner, and is characterized in that the main rubber ring is provided from the inner surface of one side pipe body to the other side pipe body. The inner surface is arranged; one side auxiliary rubber ring is inserted between the inner surface of one side pipe body and the main rubber ring; the other side auxiliary rubber ring is inserted into the inner surface of the other side pipe body and the main body Between the rubber rings; one side expansion belt disposed on the inner surface of one side of the main rubber ring for pressing the main rubber ring to the inner surface of the one side tube; and the other side expansion belt, disposed at The inner surface of the other side of the main rubber ring is used to crimp the main rubber ring to the inner surface of the other side tube.

According to the present invention, an auxiliary rubber ring is interposed between the inner surface of the tubular body and the main rubber ring, whereby, for example, when the inner surface of the tubular body is rough and lacks smoothness, a soft rubber material is used as an auxiliary rubber ring. To make the auxiliary rubber ring wrap the roughness The uneven surface is adhered in such a manner that reliable sealing performance can be obtained. On the other hand, as for the main rubber ring, a rubber material having a predetermined strength can be used.

In the present invention, it is preferred that the main rubber ring and the auxiliary rubber ring are composed of different rubbers.

In particular, from the various experimental results of the inventors of the present invention, the following knowledge is known: the Japanese Industrial Standard (JIS) hardness of the main rubber ring is preferably 60 to 70, and the JIS hardness of the auxiliary rubber ring is preferably 10~. 30.

Regarding the specific rubber material, there is the following knowledge: the main rubber ring is preferably made of natural rubber, styrene-butadiene rubber (SBR), chloroprene, ethylene-propylene- Any of Ethylene-Propylene-Diene Monomer (EPDM), the auxiliary rubber ring is preferably composed of a silicon rubber.

Further, it is preferable that the outer surface of the main rubber ring is provided with one side narrow portion corresponding to the insertion position of the one side auxiliary rubber ring, and the other side is provided corresponding to the insertion position of the other side auxiliary rubber ring. Narrow section. According to this configuration, since the fluid flowing in the tubular body acts to squeeze the auxiliary rubber rings to the respective narrow portions, the sealing performance of each of the auxiliary rubber rings is further improved.

Moreover, it is preferable that each of the expansion belts includes a plurality of arc-shaped sections which are freely formed in the circumferential direction via a pressure plate having a U-shaped hole opened at one end of the long hole of the mounting screw. Adjustably connected. By using a press plate with a U-shaped hole in which one end of the long hole is opened by the mounting screw, the position adjustment and the loading and unloading operation of the pressure plate can be performed without pulling out the mounting screw, so that the workability is further improved.

Further, it is preferable that a stainless steel (Stainless Used Steel, SUS) plate is inserted into the inner surface of the main rubber ring at a position corresponding to the pressure plate having the U-shaped hole of each of the expansion belts. Thereby, the main rubber ring can be protected from the installation screws.

Further, it is preferable that the inner surface of the main rubber ring is provided in parallel with one side concave portion for accommodating one side expansion band, the other side concave portion for accommodating the other side expansion band, and one concave portion for one side. An auxiliary recess for the auxiliary expansion ring between the other side recess. Whether or not the auxiliary expansion ring is disposed in the auxiliary recess is arbitrary. However, when the auxiliary expansion ring is disposed in the auxiliary recess, the main rubber ring can be prevented from being deformed inward.

The above described features and advantages of the present invention will be more apparent from the following description.

1, 11a, 11b‧‧‧ body

1a‧‧‧End of tube 1

2, 12‧‧‧ rubber ring

3, 14a, 14b‧‧‧ extension belt

3a, 31‧‧‧ arc-shaped section

4‧‧‧End of arc-shaped section 3a

5‧‧‧Card claws

6, 35‧‧‧ spacers

7‧‧‧Operation cylinder

7a‧‧‧cylinder

7b‧‧‧Piston

8‧‧‧ card opening

10‧‧‧Inside tube repair joint

12t‧‧‧Sloping face

13a, 13b‧‧‧Auxiliary rubber ring

14c‧‧‧Auxiliary extension belt (auxiliary extension ring)

22a, 22b‧‧‧ narrow section

23a, 23b, 28a, 28b‧‧‧ recess

24a, 24b, 26a, 26b‧‧‧Assisted stenosis

28c‧‧‧Auxiliary recess

30‧‧‧Press

30h‧‧‧U hole

40‧‧‧Mounting screws

50‧‧‧SUS board

Fig. 1 is a view showing a part of an inner surface side of an inner surface repair joint according to an embodiment of the present invention.

Fig. 2 is a partially enlarged cross-sectional view showing the inner face repair joint shown in Fig. 1;

Fig. 3 is a view corresponding to Fig. 2 before the extension tape is mounted.

FIG. 4 is a view showing a connecting portion of an extension band of the inner face repair joint according to the embodiment of the present invention.

Fig. 5 is a view showing a state in which a previous inner face repair joint is attached.

Fig. 6 is a view showing a connecting portion of an extension band of the conventional inner face repair joint.

Figure 7 is a diagram showing the operation for expanding the extension band of the previous inner face repair joint. Diagram of the cylinder.

Hereinafter, the present invention will be described in detail based on embodiments.

As shown in FIG. 1 to FIG. 3, the inner surface repair joint 10 according to the embodiment of the present invention is an inner surface repair joint for fluidly connecting the one side tubular body 11a and the other side tubular body 11b, and includes The main rubber ring 12 disposed from the inner surface of the one side pipe body 11a to the inner surface of the other side pipe body 11b. Both end portions of the main rubber ring 12 are configured as an inclined surface portion 12t so that the fluid in the tube flows smoothly.

Further, a side auxiliary rubber ring 13a is inserted between the inner surface of the one side pipe body 11a and the main rubber ring 12, and an insert is inserted between the inner surface of the other side pipe body 11b and the main rubber ring 12. The other side of the auxiliary rubber ring 13b.

The main rubber ring 12 of the present embodiment has a JIS hardness of 65, but a preferable JIS hardness ranges from 60 to 70. On the other hand, the auxiliary rubber rings 13a and 13b of the present embodiment have a JIS hardness of 20, but a preferable JIS hardness ranges from 10 to 30. Regarding the specific rubber material, the main rubber ring 12 is preferably made of any one of natural rubber, SBR, chloroprene, and EPDM, and the auxiliary rubber rings 13a and 13b are preferably made of ruthenium rubber.

That is, the main rubber ring 12 can use a rubber material having a predetermined strength (hardness), and on the other hand, a soft rubber material can be used as the auxiliary rubber ring 13a, 13b, and therefore, when the inner faces of the pipe bodies 11a, 11b are rough and lack smooth In the case of the property, the auxiliary rubber rings 13a and 13b can be adhered in such a manner as to enclose the rough uneven surface to obtain a reliable Sealing performance.

Further, as shown in FIGS. 2 and 3, on the outer surface of the main rubber ring 12, a side narrow portion 22a is provided corresponding to the insertion position of the one side auxiliary rubber ring 13a, and corresponds to the other side auxiliary rubber ring 13b. The other insertion portion is provided with the other side narrow portion 22b. As shown in Fig. 3, a recess 23a for receiving the one narrow portion 22a is provided on the one side auxiliary rubber ring 13a, and a recess 23b for receiving the one narrow portion 22b is provided on the other side auxiliary rubber ring 13b. With such a configuration, the fluid flowing in the tubular body functions to urge the auxiliary rubber rings 13a and 13b toward the narrow portions 22a and 22b. Therefore, the sealing performance of each of the auxiliary rubber rings 13a, 13b is further improved.

Further, as shown in FIG. 2 and FIG. 3, the left and right narrow portions 22a of the outer surface of the main rubber ring 12 are provided with auxiliary narrow portions 24a and 26a in parallel with the one side narrow portion 22a, and in another The left and right side narrowed portions 22b are provided with auxiliary narrowing portions 24b and 26b in parallel with the other side narrowed portion 22b.

Further, as shown in Fig. 1, a side expansion band 14a is provided on the inner surface of the one side pipe body 11a of the main rubber ring 12, and the one side expansion band 14a is for pressing the main rubber ring 12 against the one side pipe body 11a. The inner surface of the main rubber ring 12 is provided with the other side expansion belt 14b on the inner surface of the other side tube 11b, and the other side expansion belt 14b is for crimping the main rubber ring 12 to the other side. The inner surface of the one side tube 11b is disposed. Further, in the present embodiment, the auxiliary expansion belt 14c is provided on the inner surface of the central portion of the main rubber ring 12.

As shown in FIG. 4, each of the expansion belts 14a, 14b, 14c includes four arcs. In the segment 31, the four arc-shaped segments 31 are freely adjustably connected in the circumferential direction via a pressure plate 30 having a U-shaped hole 30h which is opened at one end of the long hole of the mounting screw. The position adjustment and the loading and unloading operation of the pressure plate 30 can be performed by using the platen 30 with the U-shaped hole in which one end of the long hole is opened by the mounting screw, without pulling out the mounting screw 40. Therefore, the workability is further improved.

Further, on the inner surface of the main rubber ring 12, a SUS plate 50 is inserted at a position corresponding to the pressure plate 30 having the U-shaped holes of the respective expansion bands 14a, 14b, and 14c. Thereby, the main rubber ring 12 can be protected from the damage of the mounting screw 40.

Further, on the inner surface of the main rubber ring 12, a side recess portion 28a for accommodating the one side expansion belt 14a, another side recess portion 28b for accommodating the other side expansion belt 14b, and a first side are provided in parallel An auxiliary recess 28c for accommodating the auxiliary extension ring 14c between the undercut portion 28a and the other side recess portion 28b. Whether or not the auxiliary expansion ring 14c is disposed in the auxiliary concave portion 28c is arbitrary. However, when the auxiliary expansion ring 14c is disposed in the auxiliary concave portion 28c, the main rubber ring 12 can be prevented from being deformed inward.

Next, the procedure for mounting the inner surface repair joint 10 of the present embodiment will be described.

When a liquid leak occurs in the pipe joint portion of the pipe buried in the ground, the operator enters the pipe to stop the liquid leakage of the joint portion. Then, as shown in Fig. 1, the rubber ring 12 of the inner tube repair joint 10 of the present embodiment is bridged to the inner surfaces of the end portions of the tubes 11a and 11b including the leaked joint portions. Configured.

Then, two (or three) expansion bands 14a, 14b (, 14c) are configured One side concave portion 28a and the other side concave portion 28b (and auxiliary concave portion 28c) provided on the inner surface of the rubber ring 12. As described above, each of the expansion belts 14a and 14b (and 14c) is formed by joining four arc-shaped segments 31 via a pressure plate 30 having a U-shaped hole. Specifically, after the four arc-shaped segments 31 are temporarily fixed via the press plate 30 having the U-shaped holes and the mounting screws 40, a set of adjacent arc-shaped regions is used using the operating cylinder 7 shown in FIG. The segment 31 is urged in a direction away from the circumferential direction. Further, in order to maintain such a pressed state, a spacer 35 is inserted between the one set of the arcuate segments 31. Thereafter, the operating cylinder 7 is removed. After the insertion step of the spacer 35 is completed, the arc-shaped section 31 is fixed to the pressure plate 30 by the mounting screw 40 so that the spacer 35 does not fall off. In this manner, the expansion bands 14a, 14b (, 14c) provided on the inner surface of the rubber ring 12 press the rubber ring 12 against the inner surface of the end portions of the pipe bodies 11a, 11b. Thereby, the portion including the joint portion of the pipe bodies 11a, 11b is sealed by the rubber ring 12. Further, depending on the state in which the expansion bands 14a and 14b (and 14c) are pressed toward the inner surface of the tube, an additional spacer 35 may be inserted between the other adjacent arc-shaped segments 31.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

11a, 11b‧‧‧ body

12‧‧‧ Rubber ring

12t‧‧‧Sloping face

13a, 13b‧‧‧Auxiliary rubber ring

14a, 14b‧‧‧ extension belt

14c‧‧‧Auxiliary extension belt (auxiliary extension ring)

Claims (2)

An inner surface repair joint for fluidly connecting one side tube body to another side tube body, characterized by comprising: a main rubber ring, from the inner surface of one side tube body to the inner surface of the other side tube body The first side expansion belt is disposed on the inner surface of one side of the main rubber ring for pressing the main rubber ring to the inner surface of the one side tube body; and the other side expansion belt is disposed on the main side. An inner surface of the other side of the rubber ring for pressing the main rubber ring against the inner surface of the other side tube, each expansion band comprising a plurality of arc-shaped sections, the plurality of arc-shaped sections It is connected in a circumferentially adjustable manner by a mounting plate with a U-shaped pressure plate that has one end of the long hole opened. The inner surface repair joint according to the first aspect of the invention, wherein the inner surface of the main rubber ring is inserted with a SUS plate at a position corresponding to a pressure plate having a U-shaped hole of each of the expansion belts.