JPH03292487A - Silencing structure in double piping for fluid pipe - Google Patents

Abstract

PURPOSE:To prevent a noise in a sleeve from occurring by interposing a buffer in the space, in a silencing structure which silence an impact noise to be produced along with a water hammer phenomenon in a double pipe made up of inserting a flexible hydraulic pipe into the flexible sleeve pipe after installing the space for that. CONSTITUTION:A flexible hydraulic pipe R of plastics including polyethylene or the like is inserted into a sleeve S with flexibility as in plastics, etc. A buffer 1 such as rubber, sponge, soft plastic or the like are rolled on an outer circumference of the hydraulic pipe R, and it is housed in the sleeve S. In consequence, an impact noise between the hydraulic pipe and the sleeve being produced when a flow of water in the pipe is suddenly stopped and thereby this pipe comes into a state of being waved, is thus preventable.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sound-dampening structure for double piping of fluid pipes used for construction around water such as heating and hot water supply in buildings.

(Prior Art) Recently, as shown in Figure 7, in the construction of water-related areas such as heating and hot water supply in buildings, a supply section (^) such as a water heater (10), a water tap (20), etc. are used. Connect the used part (B) with a flexible fluid pipe (R), and insert the fluid pipe (R) into a flexible sheath pipe (S) and connect it to the back of the wall (C), etc. The so-called sheath pipe construction method is becoming popular. This construction method allows for free piping behind the wall (C), so it requires less construction work than the previous piping method using metal pipes, and it is also easier to update the fluid pipe (R). It has the advantage of easy maintenance.

(Problem to be solved by the invention) However, in water piping, when the valve is closed to suddenly stop the flow of water when using a hydrant, the pressure in the pipe near the hydrant increases rapidly, and the pressure returns. This causes water to collide with the inner wall of the pipe, creating a water hammer phenomenon that produces sound.

In the above-mentioned sheath pipe construction method, the fluid pipe (R) is replaced by the sheath pipe (S
), the sound has been muffled by the soundproofing effect of the sheath tube (S).

However, in such a sheath pipe construction method, as shown in Figure 8, the fluid pipe (R) is flexible, so if the flow of water in the pipe suddenly stops, water hammer phenomenon occurs and the fluid pipe (R) R) causes an undulating state,
A new problem arose in that this collided with the inner wall of the sheath tube (S), causing a loud collision sound between the fluid tube (R) and the sheath tube (S).

Such collision noise is mainly generated when the fluid pipe (R) rubs against the inner wall of the sheath pipe (S) at the curved portion of the pipe, and cannot be prevented by the soundproofing effect of the sheath pipe (S) like water hammer. No, and such collision noise may cause discomfort to the person using the water faucet, and may also cause damage to the fluid pipe (R).

The present invention was made in view of these circumstances, and provides a fluid pipe with a double piping structure in which a flexible fluid pipe for passing fluids such as hot water and water is inserted into a flexible sheath pipe. The purpose of this invention is to provide a noise-absorbing structure that completely eliminates the sound generated within the sheath pipe in piping.

(Means for Solving the Problems) In other words, the noise reduction structure in the fluid pipe piping according to the present invention is a fluid pipe in which a flexible fluid pipe for passing fluid such as hot water or water is inserted into a flexible sheath pipe. A noise-absorbing structure for muffling the collision sound between a fluid pipe and a sheath pipe in piping, characterized in that a buffer material is interposed in the space formed between the fluid pipe and the sheath pipe. .

(Function) With this type of noise reduction structure, the flow of water inside the pipe suddenly stops, the pressure inside the pipe increases rapidly, and the water returns and collides with the inner wall of the pipe, causing the sound to be suppressed due to the water hammer phenomenon. In addition to preventing the occurrence of sound, the cushioning material also prevents the fluid pipe from becoming undulating due to the sudden stop of the flow of water in the pipe, and prevents the sound of collision between the fluid pipe and the sheath pipe. can now be completely eliminated.

(Example) Hereinafter, the present invention will be described according to an example shown in the drawings.

1 and 2 show one embodiment of the invention, FIGS. 3 and 4 show another embodiment of the invention, and FIGS.
The figure shows a further embodiment of the invention.

In these embodiments, the fluid tube (R) is made of plastic such as polyethylene.

Further, the sheath tube (S) is made of plastic and has flexibility.

The cushioning material (1) is made of rubber, sponge, soft plastic, or the like. The cushioning material (1) is preferably elastic and has a high restoring force. Further, in order to facilitate insertion into the sheath tube (S), it is preferable that the surface is smooth.

The embodiment shown in FIGS. 1 and 2 includes a fluid pipe (R), a sheath pipe (S), and a structure that is wrapped around the outer circumference of the fluid pipe (R) and housed in the sheath pipe (S). It consists of a sheet-like cushioning material (1).

For this embodiment, as shown in FIG.

By inserting the fluid pipe (R) into the sheath pipe (S) while wrapping the buffer material (1) around the outer periphery of the fluid pipe (R),
A buffer material (1) is placed in the space between the fluid pipe (R) and the sheath pipe (S).
It is now possible to adopt a sound-muffling structure with intervening.

In addition, in the embodiment shown in FIGS. 1 and 2, the sheath tube (S
) When inserting the buffer material (1) together with the fluid pipe (R) into the fluid pipe (R), fix the tip of the buffer material (1) to the fluid pipe (R) using tape or the like. The cushioning material (1) can be smoothly fed into the sheath tube (S) together with R). In addition, when inserting the fluid pipe (R), it is not limited to wrapping the buffer material (1) around the outer periphery of the fluid pipe (R), but it is also possible to wrap the buffer material (1) around the outer periphery of the fluid pipe (R) in advance and secure it. It is also possible to feed the material into the sheath tube (S).

In the embodiment shown in FIGS. 3 and 4, a fluid pipe (R) and a sheath pipe (S) are processed in advance to wrap around the outer periphery of the fluid pipe (R), and are wrapped inside the sheath pipe (S). A roughly cylindrical cushioning material (
It consists of 1).

In this embodiment, as shown in Fig. 3, the cut portion of the substantially cylindrical buffer material (1) is opened and the fluid pipe (R) is covered with the fluid pipe (R), and the fluid pipe (R) is inserted into the sheath pipe (S). By inserting the fluid tube (R) and sheath tube (S) as shown in Figure 4,
It is now possible to adopt a sound-dampening structure in which a cushioning material (1) is interposed in the space between the two.

In the case of the embodiment shown in FIGS. 3 and 4, if the fluid pipe (R) is covered with the buffer material (1), the fluid pipe (R)
Since it wraps around the outer periphery of the tube, it can be easily inserted into the sheath tube (S) as it is. Note that, similar to the embodiment shown in FIGS. 1 and 2, the tip of the cushioning material (1) may be fixed to the fluid pipe (R) using tape or the like; It is also possible to securely cover the outer periphery of the tube R) with a cushioning material (1) and feed it into the sheath tube (S).

The embodiment shown in FIGS. 5 and 6 includes a fluid pipe (R) and a sheath pipe (S), which are wrapped around the outer circumference of the fluid pipe (R) by adhesion and housed in the sheath pipe (S). It consists of a cushioning material (1).

For this example, as shown in FIG.
While attaching the cushioning material (1) to the appropriate places on the sheath tube (R),
Should I insert the fluid tube (R) into S)?

Alternatively, place the buffer material (1) in advance at an appropriate location on the fluid pipe (R).
As shown in Figure 6, the fluid tube (R) and the sheath tube (S) are inserted into the sheath tube (S).
It is now possible to adopt a sound-dampening structure in which a cushioning material (1) is interposed in the space between S).

In addition, in order to attach the buffer material (1) to the fluid pipe (R), even if adhesive is applied to the outer surface of the fluid pipe (R) during piping, the inner surface of the buffer material (1) must be adhered. An adhesive may be applied to the tube in advance, and a release paper attached thereto may be peeled off at the time of piping and attached to the fluid pipe (R).

In the case of this embodiment, it is possible to reduce the use of the cushioning material (1), thereby reducing costs. Also, fluid pipe (R)
resistance can be reduced.

Note that the form of the cushioning material (1) in this example is the first
Even if it is in sheet form like the cushioning material (1) shown in the figure, it is not one that has been processed in advance to wrap around the outer periphery of the fluid pipe (R) like the cushioning material (1) shown in Fig. 3. It's okay.

In the present invention, the form of the buffer material (1) is not limited to that of the embodiments described above, and the buffer material (1) is provided in the space formed between the fluid pipe (R) and the sheath pipe (S). 1) may be used as long as it can intervene.

(Effects of the Invention) According to the first aspect of the present invention, by interposing a buffer material in the space formed between the fluid pipe and the sheath pipe, the flow of water in the pipe suddenly stops, causing the fluid pipe to wave. It is possible to effectively prevent collision noise between the fluid pipe and the sheath pipe from occurring due to this state. Therefore, it goes without saying that the flow of water in the pipe suddenly stops, the pressure inside the pipe increases rapidly, and the return of the water causes the water to collide with the inner wall of the pipe, preventing the sound caused by the water hammer phenomenon. The buffer material prevents the fluid pipe from waving when the water flow suddenly stops, and prevents the sound of collision between the fluid pipe and sheath pipe, completely eliminating the sound. .

Thereby, the collision noise does not cause discomfort to the person using the water faucet. Further, damage caused by the fluid tube colliding with the sheath tube does not occur.

[Brief explanation of drawings]

1 and 2 show one embodiment of the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a cross-sectional view thereof, and FIGS. 3 and 4 show another embodiment of the present invention. FIG. 3 is a perspective view thereof, FIG. 4 is a cross-sectional view thereof, and FIGS. 5 and 6 show further embodiments of the present invention, FIG. 5 is a perspective view thereof, and FIG. FIG. 7 is a side view showing the piping structure of the fluid pipe by the sheath pipe construction method, and FIG. 8 is a longitudinal cross-sectional view for explaining the movement of the fluid pipe within the sheath pipe. Explanation of code 1...Cushioning material

Claims (1)

[Scope of Claims] Fluid pipes and fluid pipes that occur along with the water hammer phenomenon in single-layer fluid piping in which a flexible fluid pipe for passing fluid such as hot water or water is inserted into a flexible sheath pipe. A sound-absorbing structure for muffling the sound of collision with a sheath pipe, characterized in that a buffer material is interposed in a space formed between the fluid pipe and the sheath pipe, in a double piping of a fluid pipe. Sound deadening structure.