JP2540469Y2 - Water hammer absorber - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus capable of quickly absorbing a water hammer phenomenon that occurs when a mixing faucet is opened and closed.

[0002]

2. Description of the Related Art Conventionally, a water hammer absorbing device is housed in a connecting pipe communicating with a mixing faucet, thereby preventing abnormal noise generated when the mixing faucet is suddenly stopped and damage to a piping system. FIG. 2 (FIG. 4 of the present application) of Japanese Patent Application Laid-Open No. Hei 1-266368 discloses an example. Referring briefly to FIG. 4, the water hammer prevention device 36 is provided in the connecting pipe 37 and includes the primary flow path 38 and the secondary flow path 3.
9, a valve element 41 that opens and closes the communication flow path 40 by advancing and retreating in the axial direction, and constantly urges the valve element 41 in the valve-opening direction. The valve element urging means 42 which moves the valve element 41 forward and backward in cooperation with only the secondary-side valve element pressing force generated in the passage 39 and adjusts the pressure by adjusting the opening area of the communication flow path 40. The water stop operation is rapidly performed by a mixing faucet (not shown) connected to the connecting pipe 37, so that when a water hammer occurs, the valve pressing force from the secondary flow path 39 is reduced by the valve body. Since the pressure becomes larger than the urging force of the urging means 42 and moves the valve body 41 in the closing direction, the pressure energy of the water hammer is effectively absorbed by the valve body urging means 42.

[0003] In the above, the valve urging means 42
Spring 42a and second spring 4 forming
The setting of the spring constant of 2b is delicate, and if there is an error in the set value, the valve body will not operate lightly, so that a sufficient water hammer preventing effect cannot be obtained. It was troublesome and was not suitable for mass production.

[0004]

A problem to be solved by the present invention is to make it possible to absorb a water hammer generated when the mixing faucet is opened and closed with a simple structure.

[0005]

According to the present invention, a valve holding cylinder is attached to a screw opening formed in a flow passage of a connecting pipe, and a flange portion of a pressure absorbing valve is slidably housed in the valve holding cylinder. The pressure absorption valve includes, at both ends of the flange portion, a shaft portion through which a guide hole of a cap screwed to the valve holding tube is inserted, and an operating shaft having a tip facing the outlet, and the flange portion inside the valve holding tube. Are divided into a compression chamber that communicates with the outside through an air hole formed in the cap, and a water reservoir chamber that communicates with the outflow port through a water hole formed in the center of the working shaft, and the working shaft Is provided with a valve section having a pressure receiving surface for receiving pressure water from the flow path.

[0006] In addition, the volume of the water reservoir is expanded by pressure water entering from the water hole of the working shaft when a water hammer occurs, and when water flows from the connecting pipe to the mixing faucet, the water flows from the flow path to the working surface of the valve portion. The pressure water is sucked out to the outlet by the action of the fluid and the suction action in the water hole.

[0007]

During normal water flow, in which the fluid flows from the connecting pipe to the mixing faucet, the fluid acts on the pressure receiving surface of the valve portion and the water flow hole generated by the pressure difference between the valve portion and the water flow hole. a suction action by the water reservoir pressure water to the outlet via the water passing holes of decocted suction <br/> Succoth inner valve seat of the pressure absorbing valve flange part water reservoir
If a strong water hammer occurs due to abrupt valve closing operation while using the mixing faucet, part of the excess pressure flowing back from the mixing faucet into the connecting pipe will The pressure absorbing valve is moved by infiltrating into the water reservoir through the through-hole and applying pressure to the flange portion, thereby compressing the compression chamber partitioned by the flange portion, and absorbing the water hammer by expanding the volume of the water reservoir.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In this embodiment, as shown in FIGS. 1 and 2, the connecting pipe 1 is composed of a hot-water tap B and a hot-water tap B1 provided at both ends of a mixing faucet A, an instantaneous water heater and a water pipe (both not shown). )
And a generally L-shaped flow path 4 is formed between the inflow port 2 and the outflow port 3, and the flow path 4
A screw hole 7 is opened on the secondary side of the non-return valve 5 so as to face a mounting portion 6 connected to the mixing faucet A, and the screw hole 7 has a substantially cylindrical valve holding tube 8. Is attached via a small-diameter first male screw portion 9 formed at one end, and a cap 10 having a plurality of air holes 11 is screwed into a large-diameter second male screw portion 9a formed at the other end. I have.

A pressure absorbing valve 1 is provided on the inner peripheral surface of the valve holding cylinder 8.
A shaft portion 12b that slides in a guide hole 10a formed in the center of the cap 10 at both ends of the flange portion 12a, which is slidably accommodated in a watertight and parallel direction; Channel 4 with the tip facing outlet 3
A shaft 12c is formed integrally so as to slide in a watertight manner in an insertion hole 13a of a partition 13 partitioning the partition wall 13, and the inside of the valve holding cylinder 8 is formed by the flange 12a on the peripheral surface of the shaft 12b. The cap 10 is divided into a compression chamber 14 communicating with the outside via the air hole 11 and a water reservoir chamber 15 formed between the partition 13 on the peripheral surface of the working shaft 12c.

The water reservoir 15 is connected to the outlet 3 of the connecting pipe 1 through a water hole 12d formed at the center of the working shaft 12c.
A valve portion 16 having a tapered pressure receiving surface 16a formed on the peripheral surface thereof is attached to the tip of the working shaft 12c so that fluid pressure flowing from the flow path 4 toward the outlet 3 is applied to the tip of the working shaft 12c. ing.

Now, when the lever C of the mixing faucet A shown in FIG. 1 is operated in the valve opening direction, the fluid normally flows from the inlet 2 of the connecting pipe 1 through the flow path 4 to the outlet 3. When the water flows through, the fluid flows in the direction of the arrow shown in FIG. 2, so that the pressurized water acts on the pressure receiving surface 16 a of the valve portion 16. Further, since the fluid flows at a high pressure around the valve portion 16, the flow path in the water passage hole 12d is in a negative pressure state with respect to the outflow port 3, and the inside of the water reservoir chamber 15 communicating with the water passage hole 12d is formed. Is sucked out to the outlet 3 side through the water hole 12d by the suction effect of the fluid passing through the outlet 3. Therefore, the pressure absorption valve 12 has the above-described action of the pressure water on the valve portion 16 and
As shown in FIG. 2, the flange portion 12a is moved to the valve seat 15a
Sitting.

Next, when the lever C is suddenly operated in the water stopping direction, the sudden closing of the valve causes the hot water tap portion B and the water tap portion B1 to operate.
The internal pressure suddenly rises suddenly to generate a strong water hammer, and this water hammer wave flows backward from the mixing faucet A into the connecting pipe 1 to apply a strong internal pressure into the flow path 4, and the excess pressure water Part of the water enters the water reservoir 15 through the water hole 12d of the pressure absorbing valve 12 opened toward the mixing faucet A. The pressurized water infiltrates into the water reservoir chamber 15 to apply pressure to the flange portion 12a, and the air in the compression chamber 14 partitioned by the flange portion 12a is discharged to the outside from the air hole 11 formed in the cap 10. Thus, the compression chamber 14 is compressed. Therefore, the pressure absorbing valve 12 moves from the position shown in FIG. 2 to the position shown in FIG. 3, and the volume of the water storage chamber 15 is increased at once, so that the above-described strong water hammer can be quickly and satisfactorily absorbed.

[0013]

The present invention has the following advantages since it has the above configuration. (1) In the water hammer absorbing device of the present invention, a valve holding cylinder is attached to a screw opening opened in the flow path of the connecting pipe, and a flange portion of the pressure absorbing valve is slidably housed in the valve holding cylinder, The pressure absorption valve includes, at both ends of the flange portion, a shaft portion that penetrates the guide hole of the cap screwed into the valve holding tube and an operation shaft whose tip faces the outlet, and the inside of the valve holding tube is formed by the flange portion. A compression chamber that communicates with the outside through an air hole drilled in the cap,
A valve section that is partitioned into a water reservoir chamber that communicates with the outlet through a water hole formed at the center of the working shaft, and that has a pressure receiving surface that receives pressure water from a flow path at a tip of the working shaft. The water chamber is expanded by the pressure water entering from the water hole of the working shaft when a water hammer occurs, and the pressure receiving surface of the valve section from the flow path when water flows from the connecting pipe to the mixing faucet. Pressure water is sucked out to the outlet by the action of fluid and suction in the water hole, so only the pressure water flowing through the connecting pipe without using a spring with a delicate spring constant setting as in the past. Can be used to move the pressure absorption valve,
The shocking water hammer generated when the mixing faucet is suddenly closed can be quickly and reliably absorbed. (2) Since the shock absorbing device of the present invention has a small number of parts and a simple structure as compared with the conventional one, productivity can be remarkably improved and a convenient device can be supplied at a low price.

[Brief description of the drawings]

FIG. 1 is a front view of a mixing faucet provided with a water hammer absorbing device of the present invention.

FIG. 2 is a longitudinal side view of a connecting pipe incorporating a water hammer absorbing device.

FIG. 3 is an explanatory view of an operation procedure of the water hammer absorbing device.

FIG. 4 is an explanatory diagram of a conventional technique.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Connection pipe 3 Outflow port 4 Flow path 7 Screw hole 8 Valve holding cylinder 10 Cap 10a Guide hole 11 Air hole 12 Pressure absorption valve 12a Flange part 12b Shaft part 12c Working shaft 12d Water passage hole 14 Compression chamber 15 Water reservoir 16 Valve part 16a Pressure receiving surface

Claims (2)

(57) [Scope of request for utility model registration] 1. A valve holding cylinder is mounted on a screw opening opened in a flow passage of a connecting pipe, and a flange portion of a pressure absorbing valve is slidably housed in the valve holding cylinder. At both ends of the
A shaft portion through which the guide hole of the cap screwed into the valve holding cylinder is inserted, and an operating shaft having a tip facing the outlet, and the inside of the valve holding cylinder is provided through the air hole formed in the cap by the flange portion. It is divided into a compression chamber communicating with the outside, and a water reservoir communicating with the outlet through a water hole formed in the center of the working shaft, and a tip of the working shaft receives pressurized water from a flow path. A water hammer absorbing device, wherein a valve portion having a pressure receiving surface is mounted. 2. The water reservoir chamber is expanded in volume by pressurized water entering from a water hole of a working shaft when a water hammer occurs, and when water flows from a connecting pipe to a mixing faucet, the water flows from a flow path to a pressure receiving surface of a valve portion. The water hammer absorber according to claim 1, wherein the pressure water is sucked out to the outlet by the action of the fluid and the suction action in the water hole.