JPH0821587A - Manufacture of water hammer preventive device - Google Patents

Abstract

PURPOSE:To provide excellent water hammer preventive effect against high water hammer pressure generated in a water channel by assembling a hollow elastic body in the water channel with a compressed condition kept. CONSTITUTION:A protruded pipe part is branchedly formed on the main pipe part 2 of a faucet socket to be connected to a water channel via a connecting nut, and a branch pipe part 5 is formed in parallel to the main pipe part 2 on the protruded pipe part. A female screw 6 is formed on the opening side of the branch pipe 5, and therewith the male screw part 12 of a casing 9 having a bottomed cylindrical cylinder part 10 is threadedly engaged. A hollow elastic body 13, composed by using a hollow gel, foaming silicone, and foaming rubber etc., is housed in the cylinder part 10 of the casing 9. While a piston 7, wherein an O ring is provided on an outer periphery, is insertedly mounted in the branch pipe part 5, and the hollow elastic body 13 is made into a compressed condition when the casing 9 into which the hollow elastic body 13 is inserted is threadedly engaged with the branch pipe part 5, constituting a water hammer preventive device. This can display excellent water hammer preventive effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a water hammer prevention device for preventing a water hammer generated in a water channel.

[0002]

2. Description of the Related Art Conventionally, there is a water hammer prevention device having a structure as disclosed in Japanese Patent Application Laid-Open No. 2-89895, which is constructed by providing a casing on a branch pipe in a waterway, The hollow elastic body is inserted into the casing with a natural length to prevent water hammer by the hollow elastic body. However, in such a structure, a hollow elastic body made of silicone rubber, foamed rubber, sponge or the like having a low hardness is used, so that it is compressed by 25% or more at a normal water pressure of about 5 kg / cm ^2. When a water hammer that contracts and shrinks to a pressure exceeding 30 kg / cm ² , the water hammer preventing effect by compression was not so expected.

[0003]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems of the prior art, and is directed to a water hammer prevention device which can obtain a sufficient water hammer prevention effect against high pressure when a water hammer occurs. For the purpose of not providing a manufacturing method, the first gist thereof is to incorporate a hollow elastic body in a water channel while maintaining a compressed state. The second gist is to put a foaming agent in the casing, assemble the casing into a water channel, and foam the foaming agent in the casing to create a compressed state.

[0004]

In the first aspect, since the hollow elastic body is incorporated in the water channel while maintaining the compressed state, the hollow elastic body can withstand the high pressure when a water hammer occurs, and the high water It is possible to obtain a good water hammer prevention effect against the hammer pressure. Further, in the second aspect, since the foaming agent is foamed in a sealed state in the casing to create a compressed state, the foaming agent is held in the casing in a state of containing high-pressure bubbles, and high pressure at the time of water hammer occurs. It is possible to exert a good water hammer prevention effect against.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment. As shown in FIG. 1, a water faucet socket 1 is provided in a water channel, and a water passage R communicating with the water channel is provided in a main portion 2 of the water faucet socket 1. Is formed, and can be connected to the water channel via the connection nut 3. Further, the main pipe portion 2 has a branched pipe portion 4 formed in a branch shape, and the protrusion pipe portion 4 is parallel to the main pipe portion 2. The branch pipe portion 5 is formed on the inner side of the branch pipe portion 5, and a female screw 6 is formed on the opening side of the branch pipe portion 5. When forming a water hammer prevention device with such a faucet socket 1, a male screw portion 1 that is screwed into the female screw 6 is formed.
A casing 9 having 2 is used, and a cylinder portion 10 of the casing 9 is formed in a cylindrical shape with a bottom, and a tightening nut portion 11 for applying a tool when tightening the female screw 6 is formed on the outer periphery thereof. The hollow elastic body 13 can be inserted into the cylinder portion 10. As the hollow elastic body 13, hollow gel, foamed silicon, foamed rubber, sponge or the like can be used.

As shown in FIG. 2, an iron piston 7 having an O-ring 8 preliminarily provided on the outer periphery of the branch pipe portion 5 is provided.
3, the casing 9 in which the hollow elastic body 13 is inserted is screwed into the branch pipe portion 5 in this state, and the hollow elastic body 13 is compressed at the time of screwing,
The hollow elastic body 13 is pressed toward the cylinder portion 10. For example, when the casing 9 is screwed into and integrated with the branch pipe portion 5, the internal pressure of the hollow elastic body 13 compressed inside is 5%.
The hollow elastic body 13 can be assembled so as to have a pressure of about kg / cm ^2, and the hollow elastic body 13 thus compressed and assembled to the branch pipe portion 5 can withstand a higher pressure than a hollow elastic body having a natural length. Due to the structure, it is possible to exert a superior water hammer prevention effect against high pressure when a water hammer occurs, and by increasing the compression rate of the hollow elastic body 13 at the time of assembly, it is possible to achieve a higher water hammer. It will be able to counter.

As shown in FIGS. 4, 5, and 6, the hollow elastic body 13 is formed into several kinds of pieces having different heights. For example, the hollow elastic body 13A shown in FIG. 4 has 2 kg / cm. ²
The hollow elastic body 13B of FIG. 5 is 4 kg / cm ²
The hollow elastic body 13C of FIG. 6 is 6 kg / cm ²
For hollow elastic bodies 13A, 13
B and 13C can be appropriately selected according to the water pressure at the site, can be put in the casing 9 and compressed to be assembled, and a plurality of hollow elastic bodies 13 of the same height can be inserted into the casing 9 and attached. It can be compressed and assembled according to the water pressure at the site.

Next, FIGS. 7 to 9 show a second embodiment, in which a piston having an O-ring 8 mounted in advance in the branch pipe portion 5 of the water faucet socket 1 similar to the first embodiment. 7, the mixed silicon 16 is poured into the inside of the cylinder portion 10 of the casing 9 from the nozzle 15a of the silicon injection device 15 as shown in FIG. The silicon injection device 15 is a device that mixes the A liquid and the B liquid of a two-liquid mixed type foamed silicone and causes the mixed liquid to flow out from the nozzle 15a. Before the mixed silicon 16 poured into the casing 9 foams, As shown in FIG. 9, the male screw portion 12 of the casing 9 is screwed into the female screw portion 6 of the branch pipe portion 5, and the tightening nut portion 11 is tightened with a tool to tighten the mixed silicon 16 in the cylinder portion 10 in a sealed state. After the foaming, the high-pressure bubbles 17 are mixed in the foamed silicon 16A in the cylinder portion 10.

If, for example, a silicone foam SE1900RTV manufactured by Toray Dow Corning Silicone Co., Ltd. is used as the mixed silicon 16, when the liquids A and B are mixed, the volume becomes about 3 to 10 times due to foaming, and a chemical reaction occurs. The resulting foam is a mixture of air bubbles composed of hydrogen and air. However, in this example, since the casing 9 is assembled to the branch pipe portion 5 and foamed inside the casing 9 in a sealed state, the pressure of the bubbles 17 in the inside is about 3 to 10 times as much as usual because the volume does not increase. It becomes a high pressure of and becomes a structure that can withstand high water hammer pressure.

That is, the foamed silicone foam 16A contains high-pressure bubbles 17 inside, has a high compression resistance, and can withstand a high water pressure when a water hammer of 30 kg / cm ² or more occurs. is there. The mixed silicon 16 foams and cures at room temperature in about 1 to 2 minutes, and the curing rate can be controlled by adding a foaming retarder.

As shown in FIG. 8, it is preferable that a mold release agent is applied to the inner peripheral surface of the cylinder portion 10 before the mixed silicone 16 is poured into the casing 9, and the silicone foam SE1900RTV is used. In calculation,
When the mixed silicon 16 in an amount of about 77% of the inner volume of the cylinder portion 10 is poured, the ideal high pressure foamed silicon 16 is obtained.
A can be obtained in the casing 9.

In this embodiment, the case of manufacturing the water hammer prevention device using the water faucet socket 1 has been illustrated, but the water hammer prevention device is not limited to the water faucet socket 1 and may be incorporated in a nipple or the like by a similar method. Good, especially in the method of pouring mixed silicon 16 and foaming in a sealed state inside, mixed silicon 1
Since 6 is a fluid and can be poured into any shape, the water hammer prevention device can be easily incorporated in any place in the water channel.

[0013]

According to the present invention, since the water hammer prevention device is constructed by incorporating the hollow elastic body in the water channel while maintaining the compressed state, the hollow elastic body becomes a form capable of countering high pressure due to the compressed state, and water hammer occurs. It is possible to exert a good water hammer prevention effect against a high pressure that sometimes occurs. Further, a foaming agent is put in the casing, the casing is assembled in a water channel, and the foaming agent is foamed in the casing to create a compressed state to form a water hammer prevention device, so that the foaming agent is poured into the casing. If it is assembled in the water channel, the foaming agent foams in a sealed state in the casing to become a water hammer resistant agent that contains compressed high-pressure bubbles, and is easy to assemble, and
The water hammer prevention device can withstand a high water hammer pressure.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a state in which a casing having a hollow elastic body inserted therein is assembled to a faucet socket in a first embodiment.

FIG. 2 is a cross-sectional configuration diagram showing a state in which a piston is attached to a branch pipe portion of a water faucet socket.

FIG. 3 is a cross-sectional configuration diagram showing a state in which a casing in which a hollow elastic body is further attached is assembled to a branch pipe portion.

FIG. 4 is a perspective view of a hollow elastic body for 2 kg / cm ² .

FIG. 5 is a perspective view of a hollow elastic body for 4 kg / cm ² .

FIG. 6 is a perspective view of a hollow elastic body for 6 kg / cm ² .

FIG. 7 is a cross-sectional configuration diagram of a water faucet socket in which a piston is first incorporated in the second embodiment.

FIG. 8 is an explanatory diagram of a state in which mixed silicon is poured into the casing.

FIG. 9 is a cross-sectional configuration diagram showing a state in which a casing is assembled and high-pressure foamed silicon is formed inside.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Faucet socket 5 Branch pipe part 6 Female screw 7 Piston 8 O-ring 9 Casing 10 Cylinder part 11 Tightening nut part 12 Male screw part 13, 13A, 13B, 13C Hollow elastic body 15 Silicon injection device 16 Mixed silicon 16A Foamed silicone 17 High pressure bubbles

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Yabumoto 5-1, Koi-Ehoncho, Tokoname-shi, Aichi Stock Company Inax Co., Ltd. (72) Inventor Tokimasa Kamiya 5-1-1 Koi-Ehoncho, Tokoname-shi, Aichi Stock Company Inax, Inc. (72) Inventor, Katsumi Iwai 5-1-1, Koiemoto-cho, Tokoname City, Aichi Prefecture, Inax Inc.

Claims (2)

[Claims] 1. A method for manufacturing a water hammer prevention device, characterized by incorporating a hollow elastic body in a water channel while maintaining a compressed state. 2. A method for manufacturing a water hammer prevention device, characterized in that a foaming agent is placed in a casing, the casing is assembled in a water channel, and the foaming agent is foamed in the casing to create a compressed state.