JPH09273669A - Steel chord water hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a trouble of moving, twisting, etc., when a vehicle passes through, by forming a fixed member in a sandwich structure arranging a reinforced layer in both sides of an elastomer antiskid segment, in a device comprising a fluid transport member having a bow-shaped flat closed pipe-shaped section and the fixed member. SOLUTION: A water supplying/discharging hose 1 for supplying/discharging construction water and wastewater across a road has a fluid transport member 2 comprising an elastomer 3 and a fiber reinforced layer 4 to have a bow-shaped flat closed pipe-shaped section. In a ground side recessed part thereof, a fixed member 5 of sandwich structure, arranging a steel chord reinforced layer 7 in both sides of an elastomer antiskid segment 6 of bow-shaped sectional shape, is connected, a peripheral surface of these fixed member 5 and fluid transport member 2 is coated with a fiber reinforced elastomer outer layer 8, to be integrally connected. The antiskid segment 6 is provided for making the hose 1 in adhesion to a road surface so as to prevent the hose 1 from moving and springing when a vehicle passes through.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply / drainage hose used for supplying / draining construction water or generated mud water across a road in civil works such as roads and water / sewerage facilities. The present invention relates to a water supply / drainage steel cord hose having a structure which is light in weight and allows vehicles and the like to pass through without obstacles.

[0002]

2. Description of the Related Art In recent years, as this type of water supply / drainage hose, those shown in FIGS. 5 and 6 have been used. Reference numeral 11 in FIG. 5 is composed of a slope 12 and a water supply / drainage hose 14 each having a gently sloped surface and a hose fitting groove 13 formed at the top thereof and having a length corresponding to the road width.
(A) is a flat water supply / drainage hoist having an arc-shaped cross section composed of an elastomer-3 and a fiber reinforcing layer 4 on the surface of a non-slip segment 6a made of a short fiber reinforced elastomer having an arcuate section which is grounded and fixed to the road surface. As shown in FIG. 6 (b), it is expanded and expanded by the water pressure during water supply / drainage to open the pipe to a state of height Hs and ground contact width Bs to form a flow path. To form.

However, in the case of the one shown in FIG. 5, in many cases, the rigidity of the tilting table itself is so high that it is not possible to follow ups and downs of the road surface, and as a result of the clearance caused by the rise from the road surface, bicycles, mopeds, auto-bicycles, etc. There were not a few accidents such as jumping up and falling on a sloping platform when passing by. Further, since the shape is bulky and the weight is heavy, it is inconvenient for transportation and workability. Also, in the case of FIG. 6, since the non-slip segment 6a of the elastomer is in close contact with and fixed to the road surface, the hose is moved by the external force such as that of the passing vehicle as shown in FIG. It has become possible to safely drive automobiles, mopeds, auto-bicycles, ordinary cars, etc., but phenomena such as lifting from the road surface can be safely passed, but water supply and drainage work at a flow rate higher than the designed water supply and drainage amount can be done. When it is performed, the hose 15-e is moved to the predetermined hose 1 by the water supply / drainage pressure as shown in FIG.
At the same time as it swells more than 5-s, both side edges of the non-slip segment 6b that closely adheres to the road surface warp back from the road surface and the height He of the hose becomes higher than the predetermined height Hs. When a large-sized vehicle passes, it often happens that the water supply / drainage hose moves by being dragged a little, or the balance / unbalance is bounced or twisted. And each time, work such as returning the water supply / drainage hose to the original was required.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and allows a large vehicle such as a large vehicle or a large special vehicle to safely pass during a water supply / drainage operation and to move during the passage. A steel cord hose for water supply and drainage that has a structure that does not cause problems such as splashing, twisting, etc., is lightweight, facilitates laying and withdrawal work, and has a small storage volume and excellent storability Is to provide.

[0005]

That is, a steel cord hose for water supply / drainage of the present invention comprises a fluid transport member having a flat closed tube shape with an arcuate cross section and a fixed member, and is controlled by water pressure during water supply / drainage. In a water supply / drainage hose that expands to form a fluid flow path, the fluid transport member comprises an elastomer and a fiber reinforcement layer, and the fixing member comprises a steel cord reinforcement layer and an elastomer slip stopper having a bow-shaped cross section. A sandwich structure disposed on both sides of a segment, the gist of which is to integrally bond and coat a fiber reinforced elastomer outer layer on the outer peripheral surfaces of the fluid transport member and the fixing member. is there.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION According to the steel cord hoses for water supply / drainage of the present invention, an elastomer non-slip segment core material having a bow-shaped cross section having concave portions on both sides of the core material and having a bow-shaped cross section on the ground side, and this bow shape. By forming a sandwich structure with a steel cord reinforcing layer arranged in the longitudinal direction of the cross section, a fluid transport member by water pressure during water supply / drainage, that is, expansion / opening of a flat closed tubular fiber reinforced elastomer hose It is possible to effectively prevent detachment / floating of the arched anti-slip segment from the ground contact surface and warpage to the other side, and the ground contact portion of the steel code hose for water supply and drainage should be firmly attached to the road surface. Can be closely attached and fixed. Further, the flat closed tubular fiber reinforced elastomer hose and the outer peripheral surface of the fixing member are integrally joined and covered with the outer layer of the fiber reinforced elastomer, so that the flat closed tubular fiber reinforced elastomer due to water pressure during water supply / drainage is used. It is possible to minimize the expansion and opening of the hose and minimize the cross-sectional height of the hose, and to move and bounce the steel code hose for water supply and drainage while the vehicle is passing. Can be effectively prevented.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing the structure of a water supply / drainage steel cord hose according to the present invention. FIG. 2 is a sectional view of the water supply / drainage steel cord hose according to the present invention. Sectional view showing a state in which the steel cord / housing for water supply / drainage of the present invention expands and opens during water supply / drainage to form a water supply / drainage channel.
FIG. 4 is a view showing the relationship between the bottom of the hose of the steel cord hose for water supply and drainage of the present invention and the fixing member in the hose axial direction.
3 is an AA ′ arrow cross section of FIG.

As shown in FIGS. 1 and 2, a water / drainage steel cord hose 1 according to the present invention is a fluid having a flat closed tube shape having an arc-shaped cross section, which comprises an elastomer-3 and a fiber reinforcing layer 4. A fixing member 5 having a sandwich structure in which a steel cord reinforcing layer 7 is arranged on both sides of an elastomeric anti-slip segment 6 having an arcuate cross-section is joined to the lower surface of the grounding side recess of the transport member 2, and further, this sandwich structure A fiber reinforced elastomer outer layer 8 is integrally bonded and coated on the outer peripheral surfaces of the fixed member 5 and the fluid transport member 2.

As shown in FIG. 2, the fluid transport member 2 is a fiber-reinforced elastomer hose having a flat closed tube shape with an arcuate cross section, which is composed of an elastomer-3 and a fiber-reinforced layer 4. It is provided above the cross section of the cord hoe 1. And when water is drained, it expands due to water pressure,
The pipe is opened to form a water supply / drainage channel as shown in FIG.

Elastomer-3 is composed of natural rubber or synthetic rubber composition generally used for hoses. As the fiber material of the fiber reinforcing layer 4, fibers such as nylon, polyester and aramid are preferable, and they are used in the form of cord, plain woven cloth, woven cloth or the like.

The fluid-transporting member, that is, the fiber-reinforced elastomer hose 2 is a plain woven fabric made of the above-mentioned fibers, or a woven fabric which has been subjected to a topping treatment with an elastomer composition and the like on a mandrel. On the other hand, a predetermined number of plies are alternately wound so that the fiber directions intersect each other at a predetermined molding angle, and laminated molding is performed. For example, in the case of a nylon plain weave fabric, one or more plies of nylon cord topped with an elastomer composition are laminated and molded. After that, the obtained laminated formed body is formed into a flat tube shape with an arcuate cross section in a final step which will be described later by using a male and female mold having an arcuate cross section.

As shown in FIGS. 1 and 2, the fixing member 5 includes an elastomer-skid segment 6 having an arcuate cross section.
Of the core material and the face material of the steel cord reinforcing layer 7, which is bonded to the lower surface of the ground side recess of the fiber reinforced elastomer hose 2. As shown in FIG. 3, the fiber-reinforced elastomer hose 2 expanded and opened by water pressure during water supply / drainage is extended straight and firmly fixed to the road surface.

The elastomer non-slip segment 6 is fixed by firmly attaching the hose 1 to the road surface so that the water supply / drainage steel cord hose 1 does not move or bounce when a large vehicle travels. A member that plays a role in
It is composed of an elastomer composition and a cross-sectional shape that exhibits high rigidity.

The cross-sectional shape of this anti-slip segment 6 is
Fiber reinforced elastomer that opens due to water pressure during water supply and drainage
When the hose 2 expands, it opens in a straight line from the bow shape, and the cross section becomes gradually wider from both ends to the central part so that it can fit closely to the road surface. It is formed to have a convex crescent shape (hereinafter referred to as a bow) on the upper side. The width of the cross section, that is, the distribution of the thickness of the cross section and the curvature of the cross section, is the design flow rate (m ³ / min) of water supply and drainage, in other words, the water pressure in the hose (k
It is determined based on gf / cm ^2).

Further, the composition of the elastomer-skid segment 6 is the same as that in the case of the above-mentioned shape determination, when the work of supplying and draining the designed flow rate is performed, the ground plane of the anti-slip segment 6 becomes the maximum from the arch surface to the straight surface. A high stiffness elastomer composition is sought and determined to provide a ground contact area that produces frictional resistance. In this case, the high-rigidity elastomer composition can be used alone or as a mixture with short fibers.

The main component of the elastomer composition is natural rubber or polyisoprene (IR), polybutadiene (BR), styrene-butadiene copolymer (SB).
R), acrylonitrile-butadiene copolymer (NB
R), chloroprene (CR), isobutylene-isoprene copolymer (IIR), styrene-chloroprene copolymer, styrene-butadiene-styrene terpolymer, ethylene-propylene-diene terpolymer (EPD)
M), acrylic rubber, etc. are used. Further, if an appropriate amount of reinforcing filler such as carbon black, aerosil, titanium white, calcium carbonate, various clay is added,
The rigidity of the non-slip segment 6 can be increased.

Examples of the short fibers include nylon, polyester, aramid, carbon, glass and stainless steel.
Commercially available fiber products such as inorganic, organic or metal such as silicone can be used, and the length of the fiber is preferably 3 to 20 mm so that it can be sufficiently mixed and dispersed with the elastomer. This staple fiber is usually 0.5 to 0.5 with respect to the elastomer composition.
It is compounded in the range of 8% by weight, but when the internal pressure of the hose is high, the addition amount is further increased, or the short fiber is oriented in the major axis direction of the segment cross section to further increase the rigidity. Can be improved.

The steel cord reinforcing layer 7 is made of elastomer.
As the face material of the core material of the non-slip segment 6, it is a main constituent element that constitutes a sandwich structure capable of exhibiting high bending rigidity. The flexural rigidity of this sandwich structure is generally proportional to the first power of the sum of the elastic coefficients of the core material and the face material, and is proportional to the third power of the sum of the thicknesses thereof. In order to obtain a preferable rigidity that resists bending, a core material, that is, a segment having a large thickness and a material having a large elastic coefficient can be used for the face material 7.
As shown in FIGS. 3 and 4, the steel cord reinforcing layer 7 is formed on the upper and lower peripheral surfaces of the elastomer antislip segment 6 having a bow-shaped cross section along the longitudinal direction of the bow-shaped cross section.
The rucode 7a may be laminated and formed, for example, with two plies on the upper peripheral surface and two plies on the lower peripheral surface.

Steel used for the steel cord reinforcing layer 7
As a rule, a steel cord 7a is provided with an elastomer.
Adhesive-treated or coated is used.

The deformation stress (deformation reaction force) of the fixing member 5 is determined by the number of laminated plies of the steel cord reinforcing layer 7, the rigidity of the elastomer composition of the elastomer anti-slip segment 6, and the content of short fibers. , Or the length and the orientation direction thereof, or the distribution of thickness, and the shape having a larger sectional secondary moment or sectional modulus can be optimized.

As shown in FIGS. 1 and 2, the fiber-reinforced elastomer outer layer 8 is integrally bonded to the outer peripheral surfaces of the fixing member 5 and the fiber-reinforced elastomer hose 2 so as to cover them. ing. This fiber reinforced elastomer
The outer layer 8 is formed by subjecting the fiber reinforced layer 10 to a topping treatment with the elastomer composition 9.

As the elastomer composition 9, natural rubber or synthetic rubber generally used for hoses is used.

As the fiber reinforcing layer 10, a cord of fibers such as nylon, polyester, aramid, etc., a filament, a plain woven cloth, or a interwoven cloth is used.

The outer layer 8 of the fiber reinforced elastomer is a plain woven cloth or a woven cloth, and the fiber reinforced elastomer hose 2
The fiber-reinforced elastomer hose 2 and the fixing member 5 are then formed by aligning the fiber directions in a predetermined molding angle with respect to the axis of the fiber, for example, and by topping the fiber composition with the elastomer composition. The product is cut to a width and product length that can be rolled up in the direction perpendicular to the shaft.

Next, on the sheet having the width and length of the product unit of the fiber-reinforced elastomer outer layer 8, the fiber-reinforced elastomer hose 2 and the core material of the elastomer anti-slip segment 6 and the steel core are provided. -The sandwich structure composed of the face material of the cord reinforcing layer 7 is sequentially stacked, and finally, the upper side surface of the steel cord reinforcing layer 7 in which the protruding side edges of the fiber reinforcing elastomer outer layer 8 are located at the uppermost position. After wrapping it up to almost the center part, butting or overlapping,
Glue and coat.

Thereafter, the laminated coating obtained in this state is sandwiched between an upper concave female mold and a lower convex male mold, and is heated and pressed to have a flat closed tubular shape with an arcuate cross section. The steel cord hose 1 for water supply and drainage of the present invention is obtained.

Comparative Example 1 A 100 mm diameter mandrel and a 1.5 mm thick natural rubber composition topping-treated nylon cord were laminated and molded one by one alternately on the left and right at a forming angle of 45 ° with respect to the axis of the mandrel and vulcanized. As a result, a nylon cord-reinforced rubber hose having an inner diameter of 100 mm, a length of 8 m and a thickness of 3 mm was obtained. Also,
Using a calender roll, a nylon short fiber reinforced unvulcanized rubber (NR / IR) sheet having a thickness of 5 mm and containing 2% of a short nylon fiber having a length of 15 mm was prepared.
An elongated strip-shaped non-slip segment having a m-shaped and 140 mm-wide cross section with a gentle mountain shape was prepared. Next, the non-slip segments are stacked and adhered on the nylon cord-reinforced rubber hose so that the longitudinal central portions thereof overlap each other, and then,
As it is, it is inserted into both male and female molds having a concave cavity on the upper side, heated, pressurized and vulcanized, and a flat closed tube shape nylon cord short fiber reinforced rubber hose sample with a bow-shaped cross section Got

Example 1 In the steel cord hose sample of the present invention, a nylon short fiber reinforced rubber non-slip segment has topping treated steel cords arranged on both sides of the cord fibers in the direction perpendicular to the segment axis. 2 plies each were laminated to form a steel cord sandwich double-sided material, and a nylon plain woven cloth was topped to give a length of 8 m and a thickness of 1
mm, a nylon fiber reinforced rubber outer layer sheet having a predetermined width was prepared, and a nylon cord reinforced rubber hose and a steel cord were formed on one sheet of the outer layer sheet in the longitudinal direction of the central portion of its half width. The non-slip segments sandwiched between the sheet side materials are stacked one by one, and the nylon fiber reinforced rubber outer layer sheet protruding on both sides wraps this laminate from both sides to the inside. A steel cord hose sample having a flat closed tube shape with an arcuate cross-section was obtained by molding in the same manner as in the comparative example except that the material was abutted and bonded at approximately the center of the surface.

Evaluation method The steel cord hose samples obtained in the examples were placed on the road surface together with the comparative examples and others, and water was supplied to these hoses at a flow rate of 800 l / min per minute. The height of the hose and the contact width when pumped were measured. The results are shown in Table 1 together with other comparative examples.

[0030]

[Table 1] As is clear from Table 1, the steel cord hoses for water supply and drainage obtained according to Example 1 of the present invention were compared with the conventional hoses for water supply and drainage shown as Comparative Example 1, Significant improvements were seen in the height and the contact width. According to the present invention, the hose height was 54 mm, which was reduced to 68% as compared with that of Comparative Example 1 which was 80 mm. Further, the ground contact width is 170 mm, which is 14 of that of Comparative Example 1.
It increased to 120% compared to 0 mm. Further, in a running test of a large vehicle during normal work, no phenomenon such as movement, bounce or twist of the hose was observed. From these facts, the hose height is 54 mm and the ground contact width is 170 m.
The steel code hose for water supply and drainage of the present invention exhibiting m has sufficient frictional resistance between the road surface and the hose, and drags (moves) or passes the hose by the wheels of a large vehicle. It can be inferred that it is effective in preventing the occurrence of the jumping up and the twisting due to the rapid expansion of the hose compression portion immediately after. This is a fixing member having a cross-sectional moment of inertia or a cross-sectional modulus having a suitable size, which is composed of a sandwich structure of a non-slip segment core material and a steel cord reinforcing layer surface material having rigidity. It is presumed that this fixing member and the fiber reinforced rubber hose are integrated and covered with the fiber reinforced rubber outer layer to make a large contribution.

[0031]

As described above, according to the steel cord hose for water supply and drainage of the present invention, an elastomer having a cross-sectional shape having a preferable secondary cross-section moment or cross-section coefficient that exhibits high rigidity. -A stainless steel cord surface material having rigidity on both sides of the non-slip segment core material is arranged in a direction perpendicular to the segment axis to form a sandwich structure, thereby significantly increasing the bending rigidity of the fixing member having an arcuate cross section. It has become possible. As a result, the bending of the anti-slip segment to the opposite side due to the expansion of the hose is effectively prevented even when the amount of water supply and drainage exceeds the strength of the designed arcuate section, which is seen in the conventional one. It is possible to reduce the height and increase the ground contact width of the hose. Therefore, when the steel cord hose of the present invention is used for water supply / drainage work, it is possible to prevent the movement and bounce of the hose due to the passage of a large vehicle, which is seen in the conventional products. Became. Further, the fiber-reinforced elastomer hose and the fixing member are wrapped by an outer layer of the fiber-reinforced elastomer so as to form an integrated structure, so that the two parts are partially separated from each other, or the hose is separated from the hose. It was possible to prevent the hoses from bouncing and dancing due to the rapid expansion of the hose compression part immediately after the passage of a large vehicle due to the insufficient wall thickness of the hose. Further, by reducing the cross-sectional shape of the anti-slip segment from both ends to the central portion, passing through the cross-sectional center and forming a cross-sectional secondary moment about its major axis or a crescent shape with a large cross-section coefficient, fewer elastomeric materials can be obtained. It was possible to obtain a large bending rigidity by using. The steel cord hose of the present invention was improved by adding a rigid steel cord and a fiber reinforced elastomer outer layer to the conventional hose.
By arranging the cords on both sides of the elastomer anti-slip segment in the direction perpendicular to the segment axis to make it easier to bend in the axial direction, the hose can be laid or unwound at the time of withdrawal or the winding work is the same as the conventional product. Was able to do so.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a structure of a steel cord hose for water supply / drainage of the present invention.

FIG. 2 is a sectional view of a steel cord hose for water supply and drainage of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the steel cord hose for water supply / drainage of the present invention is expanded and opened to form a water supply / drainage channel during water supply / drainage.

FIG. 4 is a hoist of a steel cord hose for water supply and drainage of the present invention.
FIG. 4 is a cross-sectional view taken along the line AA ′ of FIG. 3 showing the relationship between the bottom of the shoe and the fixing member in the hose axial direction.

FIG. 5 is a perspective view of an example of a conventional water supply / drainage hose.

FIG. 6 is a perspective view of another example of a conventional water supply / drainage hose. (A) shows the state when water supply / drainage is not passed, and (b) shows the state when water supply / drainage is passed.

FIG. 7 is a view showing the state of expansion, bulge and anti-slip segments of the hose when the conventional water supply / drainage hose of FIG. 6 is supplied / drained at a flow rate higher than the design flow rate.

[Explanation of symbols]

1. Water supply and drainage steel cord hose of the present invention 2. Fluid transport member (fiber reinforced elastomer hose) 3. Elastomer-4. Fiber reinforced layer 5. Fixing member 6. Elastomer-skid segment 6a. Conventional non-slip segment of water supply / drainage hose 6b. 6. Non-slip segment of conventional water supply / drainage hose during water supply / drainage. Steel cord reinforcing layer 7a Steel cord 8. Fiber Reinforced Elastomer-Outer Layer 9. Elastomer-10. Fiber reinforcement layer 11. Sloping platform water supply / drainage hose 12. Tilt table 13. Water supply / drainage hose fitting groove 14. Water supply / drainage hose 15-p. Conventional flat shape water supply / drainage hose 15-s. The conventional water supply / drainage hose 15-p 15-e. Conventional water supply / drainage hose 15-p B showing the state when water is supplied and drained in excess of the design flow rate Grounding width of hose when water supply / drainage of a predetermined flow rate is passed through the water supply / drainage hose Be. Hose when water is supplied and drained beyond the design flow rate 15-
e ground contact width Bs. Grounding width of hose 15-s when water is supplied and drained within the design flow rate H Height of hose when water is supplied and discharged at a predetermined flow rate through the water supply and drainage hose He. Hose when water is supplied and drained beyond the design flow rate 15-
e height Hs. Height of hose 15-s when water is supplied and drained within the design flow rate

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masayuki Otomo 4-83-3 Shibaura, Minato-ku, Tokyo Kandenko Co., Ltd.

Claims (1)

[Claims] 1. A water supply / drainage hose which comprises a fluid transfer member having a flat closed tube shape with an arcuate cross section and a fixed member, and expands by a water pressure during water supply / drainage to form a fluid flow path, wherein the fluid transfer member is an elastomer. -And a fiber reinforcing layer, wherein the fixing member comprises a sandwich structure in which a steel cord reinforcing layer is arranged on both sides of an elastomeric anti-slip segment having an arcuate cross-section, the fluid transporting member and Fiber reinforced elastomer on the outer peripheral surface of the fixing member
A steel cord hose for water supply and drainage, characterized in that the outer layers are integrally joined and covered.