JPH0823394B2 - Flexible bag pipe joint structure - Google Patents

Description

The present invention relates to a pipe joint structure of a flexible bag body, for example, to prevent diffusion of oil floating on the sea, sediments during dredging work or construction work on the water bottom. Prevention of diffusion and lifting of floating structures such as so-called oil fences, silt fences, submerged breakwaters, fixed nets, etc. The present invention relates to a flexible bag pipe joint structure that can be used.

As a conventional pipe joint structure for a flexible bag, for example,
There are the ones shown in Figures 15-17. The belt-shaped flexible bag body 1 shown in FIG. 15 is wrapped in a reinforcing layer 5 made of a canvas 3 covered with rubber 2 and has a non-bonding area 6 in the widthwise central portion 1a and is bonded to both end portions 1b. It is formed so as to have a region and have openings 7 at both ends 1d in the longitudinal direction. The end portion 1d of the bag 1 is used to supply and discharge a fluid such as air or water to the inner cavity 1c of the bag 1.
A pipe joint 8 is inserted into and fixed to the opening 7 of the above, and the end 1d is sealed. The conventional pipe joint 8 is, as shown in FIG.
A tubular rubber layer 10 is fixed around one end 9a of the pipe 9, and a flange 11 is provided at the other end 9b so that the pipe can be connected.

When the pipe joint 8 is inserted into the opening 7 of the end portion 1d of the bag body 1 and fixed, and the end portion 1d is sealed, the surfaces of the outer peripheral surface 10a of the rubber layer 10 and the non-bonded area 6 of the end portion 1d are grindered. Buffing is performed, and the unvulcanized rubber 12 is interposed between them to be vulcanized and bonded by using a special vulcanizing device (not shown). edge
1d is a rubber layer 10 and unvulcanized rubber as shown in FIG.
A soft packing layer 13 having a substantially rhombic cross section is formed and is sealed. Alternatively, instead of the above-mentioned cylindrical rubber layer 10, a diamond-shaped soft packing layer 13 may be formed by using a vulcanization mold and used. Next, using a pair of metal pressing plates (not shown) having a partially semicircular cross section, the bag 1 is clamped from above and below the end 1d of the bag 1 to be fixed and reinforced.

(Problems to be Solved by the Invention) However, in the conventional flexible bag pipe joint structure in which the end portion 1d of the bag body 1 is sealed by using the pipe joint 8 and the pair of holding plates, the grinder is used. There is a problem that the work environment is bad because the buffing work due to is required for a long time. In addition, a special vulcanizing device and a mold are required, and a lot of man-hours are required to seal the end 1d, resulting in a high work cost. Further, when changing the sizes of the bag body and the pipe joint, it is necessary to change the vulcanization mold and the device, and there is a problem that the size cannot be changed easily.

Therefore, the present invention does not require a special vulcanizing device and a mold when the pipe joint is fixed to the end of the flexible bag and the end is sealed, and the pipe joint is easily assembled and sealed. It is an object of the present invention to provide a pipe joint structure of a flexible bag, which has a short working time, a good working environment, a low working cost, and can be easily resized.

(Means for Solving Problems) A pipe joint structure for a flexible bag according to the present invention is inserted into an opening at an end of a flexible bag and has a substantially rhombic cross section and extends outward along an axis. A pipe joint having a hard columnar body for embedding the protruding pipe body and a pipe connecting means provided at the protruding tip end of the pipe body, and an end portion of the bag body together with the pipe joint in the opening of the end portion. A pair of plate-shaped bodies that are arranged so as to be sandwiched between the upper and lower sides and have a mountain-shaped mountain portion whose cross-section is similar to the outer shape of a columnar body, and the end portions of the plate body, the pipe joint and the bag body are integrally formed. And a sealing means for sealing the assembled bag body.

(Example) Hereinafter, an example of a pipe joint structure for a flexible bag according to the present invention will be described with reference to the drawings.

1 to 8 are views showing a first embodiment of a pipe joint structure for a flexible bag according to the present invention. The oil fence 21 shown in FIG. 1 has a long length (for example, a length of 100 m) as shown in FIG.
A belt-like rubber bag body (flexible bag body) (hereinafter, simply referred to as a bag body) 22 in which the flexible bag pipe joint structure 23 according to the present invention is used at both longitudinal end portions 22a. As shown in FIG. 3, the oil fences 21 are connected to each other and filled with high-pressure air (for example, 1 kg / cm ² ) and floated on the sea or the like for use. The bag body 22 has two reinforcing layers 27 made of a canvas 26 covered with rubber 25, and is vulcanized to have a non-adhesive area in the central portion 22d in the width direction B and an adhesive area at both end portions 22c. An opening 28 is formed in the central portion 22b of both end portions 22a of the bag body 22. The pipe joint structure 23 of the flexible bag of the present invention is a pipe joint.
It is composed of 30, a plate-like body 31, and a sealing means 32 described later. As shown in FIG. 1, the pipe joint 30 has an end portion 22 of the bag body 22.
A pipe (tubular body) inserted into the opening 28 of a and protruding outward along the axis A with a substantially rhombic cross section as shown in FIG.
It has a hard columnar columnar body 36 made of a metal in which 35 is embedded. Further, a protruding tip portion 35a of the pipe 35 has a disc-shaped flange (pipe connecting means) 38 fixed to the pipe 35 and having a bolt hole 37 for connecting the oil fence 21 and connecting the pipe. Discoid stopper 40 is provided in contact with the outer periphery of the top surface 36a and the pipe 35 of the columnar body 36 to the proximal end 35b which protrudes in the pipe 35, the outer diameter D ₄₀ is pillar 3
It is larger than the sum of the short diameter D ₃₆ of the diamond-shaped cross section of 6 and the thickness D ₂₇ of the reinforcing layer 27 of the bag body 22. Further, the tip end surface 36c of the columnar body 36 (first
Figure) projecting amount inward from the end face 31c of the plate-like body 31 below for L _36c
(20 mm or more).

As shown in FIG. 1, one plate-shaped body 31 has an end portion 22a of the bag body 22 and an end portion together with the pipe joint 30 in the opening 28 of the end portion 27a.
It is arranged so as to be sandwiched from the upper and lower outer sides 22d of 22a. Further, as shown in FIG. 5, the plate-shaped body 31 has a chevron portion 31a whose part of the cross section of the plate-shaped body 31 is similar to the outer shape of the columnar body 36.
Bolt holes 42 for hermetically fixing the end portions 22a are provided on both sides of the chevron portion 31a. 43 is an iron round bar having a diameter of 4 to 6 mm. The round bar 43 is the inner side 31b of the plate-like body 31 that contacts the outer side 22d of the bag 22 and the end face 31c on the longitudinal center side of the bag 22.
Is provided at a predetermined distance L ₄₃ (5 to 10 mm) from the inside to prevent the pressure inside the bag body 22 from directly acting on a bolt nut 46 described later. In addition, the round bar 43 and the bolt hole 42 of the plate-like body 31
It is desirable to provide the interval L ₄₂ between and to be 10 to 15 mm in order to improve the sealing performance of the end 22a described later.

In FIG. 6, reference numeral 45 denotes a sealing material such as natural vulcanized rubber, which covers the outer surface 36d of the columnar body 36 of the pipe joint 30,
It is interposed between 6 and the end 22a of the bag body 22 to increase the sealing effect of the end 22a. 46 is a bolt nut, and the bolt nut 46 has a sealing material 45 on the outside of the pipe joint 30 and an end portion 22a of the bag body 22.
And, a pair of plate-like bodies 31 are integrally assembled from the outside of these, and the bag body 22 is sealed. That is, the sealing material 45 and the bolt nut 46 constitute the sealing means 32.

 Next, the operation will be described.

When the assembly end portion 22a is sealed in the opening 28 of the end portion 22a of the bag body 22 using the pipe joint structure 23 of the flexible bag body of the present invention, as shown in FIGS. The joint 30 covers the outer surface 36a of the columnar body 36 by wrapping a sealing material 45 such as an unvulcanized rubber sheet, and the stopper 40 is provided in the opening 28 of the end 22a and the end face 22e of the end 22a and the plate-like body 31. The insertion amount of the columnar body 36 can be positioned by simply inserting it until it comes into contact with the
Since L _36c can be easily obtained, it is possible to effectively prevent the pipe joint 30 from coming off due to the internal pressure. Further, the end portion 22a of the bag body 22 is bent in a mountain shape along the rhombus shape of the hard columnar body 36, and the pair of plate-like bodies 31 are arranged so as to sandwich the end portion 22a from the outside 22d of the end portion 22a, The plate-like body 31, the columnar body 36 of the pipe joint 30 and the end 22a are integrally assembled using the bolt nut 46, and the end 2 of the bag body 22 is assembled.
2a can be easily and quickly sealed. Therefore, as in the case of using the conventional pipe joint structure, the outer peripheral surface of the tubular rubber layer of the pipe joint and the surface of the non-bonded area at the end of the bag body are buffed with a grinder or special vulcanization is applied. No vulcanization bonding is performed using the device. Further, it is not necessary to form the soft packing layer having a rhombic cross section by using a vulcanization mold.

Further, since the pipe joint 30 of the flexible bag pipe joint structure of the present invention is provided with the stopper 40, the oil fence 21
Are connected and filled with high pressure air, as shown in FIG.
Even subjected to any pulling force F of the pipe joint 30 _A outwardly, as the peripheral portion 40a of the stopper 40 _B of the other pipe joint 30 _B is shown in Figure 7, large pulling suppression force in contact with the plate-like body 31 Can be demonstrated. Further, the round bar 43 is provided at a predetermined position, and the end portion 22a of the bag body 22 is bent at a bent portion 22f as shown in FIGS.
Since they are integrally fixed to each other, the force due to the high pressure air is suppressed from acting on the bolt 46, and the sealing performance is extremely large. When the round bar 43 of the present invention is provided, the bag body 22
Has a sufficient sealing performance up to 4-12kg / cm ² that the main body is destroyed, and the sealing performance without a round bar (air pressure 1kg /
It has an extremely excellent sealing performance against (leakage in cm ² ).

Further, when the end portion 22a of the bag body 22 is sandwiched together with the pipe joint 30 in the opening 28 of the end portion 22a by using the pair of plate-like bodies 31 and the sealing means 32, the end portion 22a is shown in FIG. As shown, the pinching force F ₁ and the sealing force F ₂ act. The pipe joint 30 according to the present invention has a hard columnar body 36 having a substantially rhombic cross section, and a part of the cross section of the plate-shaped body 31 has a mountain-shaped chevron portion 31 similar to the outer shape of the columnar body 31.
Since it has a, the sealing force F ₂ that is substantially constant and acts almost perpendicularly on the outer surface 36b of the columnar body 36 has an extremely large sealing performance. However, since the conventional pipe joint is provided with the cylindrical tubular rubber or the rhombic soft packing rubber on the outer side of the pipe having the circular cross section, the sealing force F ₂ in the width direction B is as shown in FIG. It varies greatly in size and does not have sufficient sealing ability due to the soft thick rubber layer.

Further, since the pipe joint structure of the flexible bag of the present invention does not use a special vulcanizing device and a vulcanizing die, the pipe joint can be easily changed in size when changing the pipe size.

Next, a second embodiment of the present invention will be described. 11th ~
FIG. 14 is a diagram showing a second embodiment of the pipe joint structure for a flexible bag according to the present invention. The same components as those in the first embodiment will be described using the same reference numerals.

In the second embodiment, the columnar body 51 of the pipe joint 50 is
As shown in the figure, the shape of the truncated pyramid is such that the cross-sectional area (VIII _b1 , VIII _b2 cross section) of the rhombus increases toward the inside of the opening 28 of the bag body 22 having a substantially rhombic cross section. 53 is the first
As shown in FIG. 14, a part of the cross section of the plate-shaped body 53 has a mountain-shaped portion 53a in which the height and width of the mountain shaped similar to the outer shape of the columnar body 51 increase toward the inside. Therefore, even if pressure is applied to the inside of the bag-shaped cavity 22 and a large outward force F ₂ acts on the pipe joint 50,
As shown in FIG. 12, the side wall 53a of the plate-like body 53 inclined to the axis C of the pipe joint 50 is changed to a force Fc in the width direction, and the pipe joint 50 is changed.
It is possible to exert a great suppressing effect on the slipping out and to exert a so-called self-sealing effect which further enhances the sealing ability by the pressure in the cavity.

In addition, in the above-described embodiment, the case where the chevron portion of the plate-shaped body has a top portion with a rectangular cross-section similar to the outer shape of the pipe joint has been described. May have a semicircular shape, and the chevron portion of the plate may have a semicircular shape.

Further, in the above embodiment, the case where the round bar of the plate-shaped body is provided at the predetermined distance L ₄₃ from the end surface 31c of the plate-shaped body 31 has been described, but in the present invention, the position of the round bar is a pair. The plate-like bodies may be provided above and below, or they may be provided in a staggered manner.

(Effect) As described above, according to the present invention, when the pipe joint is assembled and sealed at the end of the flexible bag body, the buffing work of buffing the end and the pipe joint with a grinder is unnecessary, The working environment is improved, the work is easy and the working time is short, and the working efficiency can be greatly improved. In addition, no special vulcanizing device and vulcanizing mold are required, and the processing cost can be reduced.
Can easily change the tube size. Furthermore, the sealing performance of the end portion of the bag can be significantly improved.

[Brief description of drawings]

1 to 9 are views showing a first embodiment of a pipe joint structure for a flexible bag according to the present invention. FIG. 1 is a partial plan view of the same used for a bag, and FIG. 2 is a bag. Partial perspective view of the body, FIG. 3 is a partial conceptual view showing the state during use, FIG. 4 (a) is a perspective view of the pipe joint, and FIG. 4 (b) is FIG. 4 (a). IV _b -IV _b cross-sectional view along a line, FIG. 5 (a) is a partial plan view of the plate member, FIG. 5 (b) is a front view of FIG. 5 (a), FIG. 5 (c ) Is a side view of FIG. 5 (a), FIG. 6 is a perspective view of FIG. 1, FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6, and FIG. 8 is VIII of FIG.
-VIII arrow sectional view, FIG. 9 is a conceptual diagram showing its action,
FIG. 10 is a conceptual diagram showing the conventional operation. 11 to 14 are views showing a second embodiment of the present invention, FIG. 11 is a plan view thereof used for a bag, FIG. 12 is a partially enlarged sectional view showing its action, and FIG. a) is a plan view of the pipe joint, FIG. 13 (b) is a conceptual cross-sectional view showing changes in the XIII _b1 and XIII _b2 cross sections of FIG. 13 (a), and FIG. 14 (a) is a plan view of the plate-shaped body. A plan view and FIG. 14 (b) are front views of FIG. 14 (a). 15th
To 17 are views showing a conventional pipe joint structure of a flexible bag, FIG. 15 is a perspective view at the time of assembly, FIG. 16 (a) is a front view of the pipe joint, and FIG. 16B is a side view of FIG. 16A, and FIG. 17 is a partial cross section after the assembling. 21 …… Oil fence, 22 …… Rubber bag (flexible bag), 22a …… Both ends, 22b …… Center part (width direction), 22c …… Both ends, 22d …… Outer surface, 22e …… End face, 22f …… Bending portion, 23 …… Flexible bag pipe joint structure, 25 …… Rubber, 26 …… Canvas, 27 …… Reinforcing layer, 28 …… Opening, 30, 30A, 30B , 50 ...... Pipe joint, 31, 53 ...... Plate, 31a ...... chevron, 31b ...... inside, 31c ...... end face, 32 ...... sealing means, 35 ...... pipe (tube), 35a ...... Tip, 36, 51 …… Column, 36a …… Top surface, 36b …… Outer surface, 36c …… Tip surface, 37, 42 …… Bolt hole, 38 …… Flange (pipe connecting means), 40 …… Stopper, 43 …… Round bar, 45 …… Seal material, 46 …… Bolt / nut

Claims (1)

[Claims] 1. A rigid columnar body for embedding a tubular body which is inserted into an opening at an end portion of a flexible bag and has an approximately rhombic cross section and which projects outward along an axis, and a projecting tip portion of the tubular body. The pipe joint having the provided pipe connecting means and the pipe joint in the opening of the end are arranged so as to sandwich the end portion of the bag body from above and below the end portion, and a part of the cross section is similar to the outer shape of the columnar body. A pair of plate-shaped bodies having the chevron-shaped chevron portions, and a sealing means for integrally assembling the plate-shaped body, the pipe joint and the end portion of the bag body and sealing the bag body. Flexible bag pipe joint structure.