JPH10311462A - Sheath tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relieve a collision of a water passing tube with a sheath tube on the basis of a water hammer phenomenon, and enhance heat reserving performance of the tube itself by integrally forming a shock absorbing layer composed of a foaming agent having both heat reserving performance and shock absorbing performance on an inner peripheral surface. SOLUTION: A sheath tube S1 is a synthetic resin corrugated flexible tube such as polyethylene, and a shock absorbing layer C1 is formed on its inner peripheral surface in a condition of being brought into close contact with both a recessed part and a projecting part. This shock absorbing layer C1 is molded by a foaming material such as a soft resin, and is required to have heat reserving performance and shock absorbing performance. Therefore, when a water passing tube P inserted inside waves by a water hammer phenomenon, the water passing tube P collides with the shock absorbing layer C1 , and this collision is relieved, and heat is reserved when hot water is supplied. In this sheath tube S1 . since the shock absorbing layer C1 is formed so as to be brought into close contact with recessed-projecting parts of its inner peripheral surface, when the water passing tube P is passed, the shock absorbing layer C1 is not dislocated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath pipe for a double pipe into which a hot water supply / water supply pipe is inserted.

[0002]

2. Description of the Related Art There is a so-called sheath pipe method as one of piping structures of hot water or a fluid pipe for supplying water in a building. As shown in FIG. 18, this sheath pipe method employs a synthetic resin called sheath pipe S between a fluid supply part A such as a water heater 21 and a fluid consuming part B such as a water tap 22. In this method, a flexible protective tube is piped, and a flexible water pipe P made of synthetic resin is inserted into the protective tube to form a double piping structure. This sheath pipe method, compared to the piping method using metal pipes that had been implemented before,
There is an advantage that construction is easy and maintenance such as renewal of the water pipe P is easy.

[0003] The hot water supply / water supply pipe is not limited to the double pipe structure by the above-mentioned sheath pipe method, and when the valve of the water tap 22 or the like is closed and the flow of water is suddenly stopped, the valve of the water tap 22 or the like is closed. When the water flow collides with the portion, the pressure in the portion sharply increases, and then the large pressure propagates to the water heater 21 side, and the water in the water pipe P collides with the inner wall and abnormally. A water hammer phenomenon that generates sound occurs. In the double piping structure by the above-mentioned sheath pipe method,
Since the water pipe P that generates an abnormal sound due to the water inside is inserted into the sheath tube S, the abnormal sound based on the above-described cause can be relatively easily muted.

However, a water pipe P through which water passes is provided.
Because of the flexibility, the water pipe P is deformed into a wavy state by the water hammer phenomenon, and collides with the inner wall surface of the sheath pipe S. Sound is also generated by the collision with the sheath tube S. The collision sound caused by the collision between the water pipe P and the sheath pipe S increases in the curved portion.

Accordingly, the present applicant has set the outside of the water pipe covered with a buffer material, inserted the water pipe into the sheath pipe,
An application has been filed to mitigate the impact sound based on the water hammer phenomenon by using the cushioning material (Japanese Patent Application Laid-Open No. 3-292487). However, when the outside of the water pipe is covered with the buffer material and the water pipe is inserted into the sheath pipe, the buffer material is partially peeled off from the water pipe in the middle of the insertion, and the water pipe has It is difficult to insert the water pipe into the sheath pipe while the outside is completely covered with the cushioning material. In addition, since the pipe resistance is large when the water pipe is inserted, the buffer material is likely to be stretched or damaged by the resistance. Furthermore, at the time of hot water supply, the water pipe or the sheath pipe itself is required to have heat insulation,
It is difficult to penetrate the sheath pipe with the buffer material completely covered with the water pipe, and since the buffer material is not in close contact with the outside of the water pipe or the inside of the sheath pipe, its heat insulation Sex was low.

[0006]

SUMMARY OF THE INVENTION The present invention is to provide a double-pipe sheath pipe through which a hot water supply / water supply water pipe is inserted, while alleviating collision of the water pipe with the sheath pipe based on the water hammer phenomenon. The problem is to increase the heat retention of the tube itself.

[0007]

According to the present invention, there is provided a hot water supply system comprising a flexible tube made of synthetic resin and having a flexible tube made of synthetic resin. A sheath pipe for a double pipe through which a water pipe is inserted, and a structure in which a buffer layer made of a foam material having both heat insulation and buffer properties is integrally formed on the inner peripheral surface thereof. Its features.

[0008] Since the buffer layer is integrally formed on the inner peripheral surface of the sheath pipe, even if the water pipe undulates due to the water hammer phenomenon, the water pipe collides with the buffer layer.
The collision is reduced. For this reason, the collision sound is also reduced. Further, when the buffer protrusion is provided on the inner peripheral surface of the buffer layer, the water pipe collides with the buffer layer via the buffer protrusion, so that the collision of the water pipe with the buffer layer is further reduced. At the same time, when the water pipe is passed through the sheath pipe, the buffer layer is not damaged because the buffer projection guides the water pipe.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples. Figure 1 is a broken perspective view of part of the sleeve pipe S ₁ according to the present invention, FIG. 2 is a likewise semi vertical sectional view. The sheath tube S ₁ is a corrugated flexible tube made of a synthetic resin such as polyethylene, and has a buffer layer C ₁ formed on the inner peripheral surface thereof in a state of being in close contact with both the concave portion 1 and the convex portion 2. . The buffer layer C _1, the rubber, is molded in foam material such as soft resin, it is necessary and a buffering property and heat retention.
In this way, forming a buffer layer C ₁ by closely both the recess 1 and the convex portion 2 of the inner peripheral surface of the sheath tube S ₁ together, at the time of molding of the sheath tube S _1, the buffer layer the C ₁ may be blow molded. Further, the water pipe P for water heating and the water supply is a flexible tube made of synthetic resin, is inserted into the sheath pipe S _1. This sheath tube S ₁ has a buffer layer C ₁ integrally formed on its inner peripheral surface.
For There are a buffering property and heat retention by water hammer phenomenon, when inserted through the water pipe P is waved inside the vent water pipe P is to collide with the buffer layer C _1, the The collision is alleviated, and the heat retention during hot water supply is achieved. Further, in this sheath pipe S _1, since the buffer layer C ₁ in close contact with the uneven portion of the inner peripheral surface of the sheath tube S ₁ is formed, at the time of passing pipe water pipe P, the buffer layer C There is an advantage that ₁ does not shift.

[0010] Next, a description will be given of another sheath pipe S ₂ according to the present invention. Figure 3 is a broken perspective view of part of the sleeve pipe S _2, FIG. 4 is a likewise semi vertical sectional view. This sheath tube S ₂
, The inner buffer layer C ₂ cylindrical so as to close only the convex portion 2 on the circumferential surface is formed integrally with the cushioning layer C _2,
A structure in which an air layer E ₁ of the annular is formed between the recess 1 of the sheath pipe S _2. In this sheath pipe S _2, the presence of the buffer layer C _2, at the time of occurrence of the water hammer phenomenon, it is possible to alleviate the collision of the water pipe P, but also increased warmth, with respect to this insulation, the buffer layer C ₂ And air layer E ₁
The feature is that it is greatly enhanced by the synergistic action with

[0011] Next, further described alternative sleeve pipe S ₃ according to the present invention. Figure 5 is a broken perspective view of part of the sleeve pipe S _3, FIG. 6 is a similarly semi vertical sectional view. The sheath pipe S _3, as well are formed integrally with the cylindrical buffer layer C ₂ is the inner peripheral surface so as to close only the inner peripheral protrusions 2 thereof, so as to close only to the outer convex section 3 A cylindrical heat insulating layer H is integrally formed on the outer peripheral surface. Therefore, the air layer E ₁ is formed between the inner peripheral recess 1 of the sheath tube S ₃ and the buffer layer C _2, between the outer peripheral recesses 4 and the outer buffer layer C ₃ of the sheath tube S ₃ air layer E ₂ is formed. Since the inner and outer peripheral surfaces of the sheath tube S ₃ are covered with a buffer layer C ₂ and a heat insulating layer H, respectively, and the air layers E ₁ and E ₂ are formed inside and outside the sheath tube S ₃ , respectively, the heat insulation is achieved. Sex is further enhanced.

Next, another sheath tube according to the present invention will be described. Each of the sheath tubes described below is provided on the inner peripheral surface of the buffer layer integrally formed on the inner peripheral surface of the sheath tube. They are common in that they have a structure in which buffer projections are protruded.
Sheath tube shown in FIGS. 7 and 8 S _4, the inner only the inner peripheral protrusions 2 on the peripheral surface so as to close the buffer layer C ₄ is formed integrally, a number on the inner peripheral surface of the buffer layer C ₄ buffer projections F ₄ is configured projecting from the radial direction. The protrusion length of the buffer projection F ₄ is such that when the axis of the water pipe P inserted into the sheath pipe S ₄ is aligned with the axis of the sheath pipe S ₄ , the water pipe P
It is not long enough to touch. This buffer projection F ₄
Along the longitudinal direction of the sheath tube S ₄ is composed of a series of ridges. Thus, cushioning protrusions F ₄ on the inner peripheral surface of the cushioning layer C ₄
If There are projected, when occurrence of the water hammer phenomenon, inserted through the water pipe P in the interior of the sleeve pipe S _4, in order to collide with the buffer layer C ₄ through the moderate collision force F _4, the collision There is an advantage that the buffer effect can be further enhanced.

The sheath tube S ₅ shown in FIG. 9 and FIG.
Is so as to close only the inner peripheral protrusions 2 on its inner peripheral surface a buffer layer C ₅ is formed integrally, a number of cushioning protrusions F ₅ on the inner peripheral surface of the buffer layer C ₅ is projected in the radial direction and the configuration is identical to the sleeve pipe S _4, the protruding length of the buffer protrusion F ₅ is the axis of insertion has been the water pipe P to the sheath pipe S _5, the sheath tube S
_When aligned with the axis of ₅ , the tip of the buffer projection F5 has a length in contact with the water pipe P. Further, in the sheath tube S ₆ shown in FIGS. 11 and 12, the projecting directions of the buffer projections F ₆ projecting from the inner peripheral surface of the buffer layer C ₆ are the same as those of the buffer projections F ₄ and F _5. However, the number of buffer projections F ₆ is less than each of the buffer projections F ₄ and F ₅ ,
Moreover, the projection length is an intermediate length between the buffer projections F ₄ and F ₅ . Each buffer projections F ₅ of the sheath tube S _5, S _6, F ₆
Are each formed of a ridge that is continuous in the longitudinal direction.

FIGS. 13 to 15 show cross-sectional views of further sheath tubes S ₇ , S ₈ and S ₉ . Each of these sheath pipe S _7, S _8, S buffer layer C _7, C _8, a buffer protrusion F ₇ protruding from the inner peripheral surface of the C ₉ of _9, F _8, F ₉ are all at ridges However, the projecting lengths of the sheath pipes S ₇ and S ₈ are different from each other when the axis of the water pipe P inserted therethrough is aligned with the axis of the sheath pipes S ₇ and S _8. Although the tip portion of the buffer projections F _7, F ₈ is in length that does not touch the vent water pipe P, the protruding length of the buffer projections F ₉ of the sheath tube S _9, in similar conditions, the cushioning projection F ₉ Has a length in contact with the water pipe P by a predetermined length. Also, any of the buffer projections F ₇ , F ₈ , F ₉
Also has a common feature in the configuration in which the projecting direction is inclined with respect to the radiation direction of each of the sheath tubes S ₇ , S ₈ , S ₉ . Here, the buffer protrusion F ₇ of the sleeve pipe S _7, at the time of undeformed a plate-like, all are inclined in the same direction, cushioning protrusions F ₈ of the sheath tube S ₈ is Wanko during undeformed have a curved plate, moreover mutually adjacent respective buffer projections F ₆ Luwan song direction is reversed each other. Furthermore, the buffer projection F ₉
It has a plate shape curved in the same direction when not deformed.

The cushioning projection F ₇ of the sheath tube S ₇ has a plate shape when not deformed, but is projected so as to be inclined with respect to the radial direction of the sheath tube S _7. Both the buffer projections F ₈ and F ₉ of the tubes S ₈ and S ₉ are curved when not deformed. For this reason, each of the buffer projections F ₇ , F ₈ , F ₉ is easily tilted, and can stably support the water pipe P inserted into the sheath pipes S ₇ , S ₈ , S ₉ , and furthermore, the water pipe P At the time of passage of the tube, there are many advantages that the passage resistance is reduced because the internal space is widened by tilting.

Each of the buffer projections F _{4 to} F ₉ projecting from the inner peripheral surfaces of the buffer layers C _{4 to} C ₉ is an example of a ridge that is continuous in the longitudinal direction. You may comprise with the projected ridge. In the case where the buffer protrusion is constituted by the protruding ridge intermittently in the longitudinal direction, it becomes easier to tilt as compared with the continuous ridge. Furthermore, the sheath tube S ₁₀ shown in FIG. 16, the pin-shaped buffer protrusions F ₁₀ multiple on the inner peripheral surface of the buffer layer C ₁₀ closely to any inner peripheral surface of the uneven portion 2 is projected It is a thing.
Thus, it is also possible to make the buffer projections pin-shaped.

In any of the sheath pipes S _{1 to} S ₁₀ , a water pipe P is inserted into the inside of the sheath pipes to form a double pipe structure. In particular, in order in the sheath tube S _1, S ₁₀ is the buffer layer C _1, C ₁₀ in any of the uneven portions 1 and 2 of the inner peripheral surface thereof are closely, buffer layer C ₁ at the time of passing pipe, There is the advantage that C ₁₀ is not displaced, the sleeve pipe S ₄ to S _10, in order to buffer the projection F ₄ to F ₁₀ on the inner peripheral surface of the cushioning layer C ₄ -C ₁₀ are projected, the buffer The projections F _{4 to} F ₁₀ guide the passage of the water pipe P, so that the buffer layers C _{4 to} C ₁₀ are hardly damaged and
It is easy water pipe P is supported in the central portion of the sleeve pipe S ₄ to S _10, the support state is advantageous to stabilize. Furthermore, the sheath tube S ₇ to S _9, the cushioning projection F ₇ to F ₉ are, or are inclined with respect to the radial direction at the time of non-modified, in order to have curved, the buffer projections F ₇ ~ and F ₉ becomes easily tilted, with the resistance at the time of passing tube becomes smaller, there is an advantage that can reliably support the water pipe P.

As described above, the sheath tubes S _{1 to} S ₁₀ according to the present invention.
In order to buffer layer C ₁ -C ₁₀ is integrally formed on the inner peripheral surface thereof, even when the double pipe is inserted through the water flow pipe P to this, in the event of a water hammer phenomenon, the water pipe Even if P is deformed in a wavy state, the water pipe P
Collide the cushioning layer C ₁ -C _10, this collision is alleviated. In particular, as shown in FIG. 17, the buffer layers C _{4 to} C ₁₀
Of the sheath tube S ₄緩衝 with buffer protrusions F ₄ ＦF ₁₀ protruding from the inner peripheral surface of
In S _10, the water pipe P via the the moderate collision force F ₄ to F ₁₀ in order to collide with the buffer layer C ₄ -C _10, the collision can be more relaxed.

The sheath pipe according to the present invention may be used in a construction site in which a water pipe is inserted into the inside of the pipe. It is also possible to cut and use. In the latter use example, when the buffer protrusion is provided on the inner peripheral surface of the buffer layer as described above, the water pipe inserted therein is supported by the buffer protrusion, and is provided at the center of the sheath tube. Due to the arrangement, the water pipe is less likely to be damaged when the sheath pipe is cut.

[0020]

According to the present invention, since the buffer layer is integrally formed on the inner peripheral surface of the sheath tube according to the present invention, the sheath tube can be inserted into the sheath tube even when the water tube is wavy due to the water hammer phenomenon. Since the existing water pipe collides with the buffer layer, the collision is alleviated and the collision noise is reduced. Further, when the buffer protrusion is provided on the inner peripheral surface of the buffer layer, the water pipe collides with the buffer layer via the buffer protrusion, so that the collision of the water pipe with the buffer layer is further reduced. At the same time, when the water pipe is passed through the sheath pipe, the buffer layer is not damaged because the buffer projection guides the water pipe. Furthermore, the buffer layer integrally formed on the inner peripheral surface of the sheath tube for cushioning also functions as a heat retaining layer, so that the heat retaining effect during hot water supply is enhanced.

[Brief description of the drawings]

1 is a broken perspective view of a portion of the sheath tube S _1.

FIG. 2 is a half longitudinal sectional view of the same.

3 is a broken perspective view of part of the sleeve pipe S _2.

FIG. 4 is a half longitudinal sectional view of the same.

5 is a broken perspective view of part of the sleeve pipe S _3.

FIG. 6 is a half longitudinal sectional view of the same.

7 is a broken perspective view of part of the sleeve pipe S _4.

FIG. 8 is a transverse sectional view of the same.

9 is a perspective view partially broken of the sheath tube S _5.

FIG. 10 is a transverse sectional view of the same.

11 is a broken perspective view of part of the sleeve pipe S _6.

FIG. 12 is a transverse sectional view of the same.

13 is a cross-sectional view of the sheath tube S _7.

14 is a cross-sectional view of the sheath tube S _8.

Figure 15 is a cross-sectional view of the sheath tube S _9.

16 is a broken perspective view of part of the sleeve pipe S _10.

FIG. 17 shows a sheath tube S ₅ caused by a water hammer phenomenon.
It is a longitudinal cross-sectional view in the state where the water pipe P inserted in the curved part was wavy.

FIG. 18 is a schematic view of a sheath tube method.

[Explanation of symbols]

C ₁ , C ₂ , C _{4 to} C ₁₀ : buffer layer E ₁ , E ₂ : air layer F _{4 to} F ₁₀ : buffer protrusion H: heat insulating layer P: water pipe S _{1 to} S ₁₀ : sheath pipe 1: sheath pipe Inner peripheral concave portion 2: Inner peripheral convex portion of the sheath tube 3: Outer peripheral convex portion of the sheath tube 4: Outer peripheral concave portion of the sheath tube

Claims (6)

[Claims] 1. A corrugated flexible tube made of synthetic resin,
A sheath pipe for a double pipe into which a hot water supply / water supply water pipe made of a synthetic resin and a flexible pipe is inserted. Inside the sheath pipe, both heat insulation and buffering properties are provided. A sheath tube, wherein a buffer layer made of a foam material is integrally formed. 2. The sheath tube according to claim 1, wherein a buffer projection is further provided on an inner peripheral surface of the buffer layer to further reduce collision of the water pipe with the buffer layer. . 3. The sheath tube according to claim 2, wherein the buffer protrusion is provided so as to be inclined or curved so as to be easily tilted when it interferes with a water pipe. . 4. The sheath tube according to claim 1, wherein the buffer layer is provided in close contact with both of the concave and convex portions provided on its inner peripheral surface. 5. The buffer layer according to claim 1, wherein an air layer is formed between the buffer layer and the concave portion in close contact with only the convex portion among the concave and convex portions provided on the inner peripheral surface of the buffer layer. Item 4. The sheath tube according to any one of Items 1 to 3. 6. A heat insulating layer made of a foam material having a heat insulating property is formed on the outer peripheral surface of the self in close contact with the outer peripheral convex portion, and an air layer is formed between the outer peripheral concave portion and the heat insulating layer. The sheath tube according to any one of claims 1 to 5, characterized in that: