JPH0567874U - Constant flow water governor - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate noise such as vibration noise and water flow noise caused by vibration of the valve body. [Structure] In a constant flow water governor including a tubular valve casing A and a valve body V, the valve body V is held on the same axis as the valve casing A by a guide spindle 9 to prevent shake of the valve body due to water flow. It is characterized by doing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a constant flow water governor used for a water passage such as a gas water heater.

[0002]

[Prior Art]

 As a conventional constant flow water governor of this type, for example, as shown in Japanese Utility Model Publication No. 3-48650, a tapered conical shape for converging the flow of water in the center of the secondary pressure chamber of the main body. A pressure receiving plate having a water passage hole is slidably inserted therein, the pressure receiving plate is biased to the upstream side by a governor, and the pressure receiving plate is used as a valve for controlling flow rate provided on the upstream side of the main body. It is fitted and abutted by the urging force of the pressure spring toward the downstream side so as to be connected in the front and back, and an elastic ring is fitted around the pressure receiving plate. There is a structure held on the line.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional technique has the following problems in practical use.

Since the elastic ring is arranged around the pressure receiving plate, the elasticity of the pressure receiving plate absorbs and damps the vibration of the pressure receiving plate, but a hysteresis phenomenon of elasticity, that is, a deviation in each direction due to a hysteresis phenomenon occurs. The flow rate changes, which is not preferable.

Since the frictional force acts on the elastic ring portion, the change in the control water amount is notable when the water pressure is increased or decreased.

When friction deterioration occurs in the elastic ring, vibration increases, and thus noise such as vibration noise and water flow noise is generated.

Since the pressure receiving plate and the valve body are fitted and brought into contact with each other and are arranged in front and rear, water remains between the valve and the valve seat even if water is drained, and if this freezes, water remains until the residual frozen ice melts. Does not function as a governor.

Since many components such as the main body, the pressure receiving plate, the valve body, the governor spring, the pressing spring, the elastic ring, the spring receiving plate, and the main body fixing nut are required, the water governor itself just becomes large in size. Not only that, it becomes expensive.

In view of the above problems of the prior art, the constant flow water governor of the present invention is a constant flow water governor composed of a tubular valve casing and a valve body, in which the valve body is guided by a guide spindle. With a simple structure, the constant flow water governor that eliminates vibration noise, water flow noise, etc. due to the unique vibration caused by flowing water, and at the same time realizes downsizing and cost reduction of the water governor. It is intended to be provided.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the constant flow water governor of the present invention has a main valve seat 2 and a main valve seat 2 in a cylindrical valve casing A having a main valve seat 2 and a sub valve seat 3 with a water discharge hole 1 in a peripheral wall interposed therebetween. A main valve part 4 and a sub-valve part 5 which come into contact with and separate from the sub valve seat 3 at the same time are provided, and a differential pressure plate 6 is integrally formed on the upstream side thereof. The valve body V is inserted freely in the forward and backward movements with the gap 7 present, and the valve body V is urged to the upstream side by the ridge 8 to balance the amount of water passing through the ring-shaped water passage gap 7 with the spring load of the ridge 8 to obtain the water amount. The main feature of the constant flow water governor that is automatically controlled to a constant flow rate is that the valve body V is held at the same axis as the tubular valve casing A by the guide spindle 9.

[0011]

[Action]

 Since the constant flow water governor of the present invention has the above-mentioned constitution as a main feature, the main flowing water of the water flowing into the valve casing A through the ring-shaped water passage gap 7 is the main valve seat 2 and the main valve portion. The outflow water flowing out of the water outlet 1 of the valve casing A through the space 4 and the sidestream water diverted to the communication hole 10 formed in the peripheral wall between the main valve portion 4 of the valve body V and the differential pressure plate 6 are the valve body. From within V, it passes through between the sub valve seat 3 and the sub valve portion 5, merges with the main flow water, and flows out from the water discharge hole 1.

At this time, the valve body A is moved by the pressure difference between the upstream side and the downstream side of the differential pressure plate 6 to move the valve body V to a position where the amount of water passing through the ring-shaped water passage gap 7 and the spring load of the spring 8 are balanced. Then, the stationary state adjusts the opening degrees of the main valve seat 2 and the main valve portion 4, and the sub valve seat 3 and the sub valve portion 5, so that the amount of water passing through the ring-shaped water passage gap 7 is automatically controlled to be constant.

In the constant flow rate control operation, the valve body V is guided by the guide spindle 9 and moves back and forth, so that the shake due to the water flow does not occur.

[0014]

【Example】

 An embodiment of a constant flow water governor according to the present invention will be described below with reference to the drawings.

In FIG. 1, A is a tubular valve casing, which is provided with a main valve seat 2 and an auxiliary valve seat 3 with a water discharge hole 1 bored in the peripheral wall thereof being sandwiched, and the tubular valve casing A is It is mounted and fixed in the water passage B such as a gas water heater.

V is a tubular valve body, and is provided with a main valve portion 4 for the main valve seat 2 and a sub valve portion 5 for the sub valve seat 3 of the valve casing A, and the main valve portion 4 and the sub valve are provided. The part 5 is not in contact with and separated from the main valve seat 2 and the sub valve seat 3 at the same time, and the differential pressure plate 6 is integrally formed on the upstream side of the main valve part 4 and the sub valve part 5, and further, A communication hole 10 is formed in a peripheral wall between the portion 4 and the differential pressure plate 6, and the valve body V has a ring-shaped water passage gap 7 in the peripheral surface of the differential pressure plate 6 in the valve casing A. It is inserted freely to move forward and backward, and the spring 8 is biased to the upstream side to hold the two-stage valve in a normally open state.

As for the spring load of the ring-shaped water passage gap 7 and the spring 8, the amount of water passing through the water passage gap 7 and the spring load of the spring 8 are balanced, and the water amount is automatically adjusted to a constant flow rate by the two-stage valve portion. The relationship is set to control.

Reference numeral 9 denotes a guide spindle, which is inserted through the center of the valve body V, and the valve body V is supported by the guide spindle 9 at a boss portion 11 integrated with the differential pressure plate 6. One end of the guide spindle 9 is The valve body V is inserted and supported at the center of the tip sheet 12 of the valve casing A and at the other end at the center of a support plate 14 having a through hole 13 fixed to the valve casing A, and the valve disc V is guided by the guide spindle 9 to the valve casing A. It is held on the same axis as A.

The valve body V and the guide spindle 9 are integrally fixed at the boss portion 11 of the valve body V so that the valve body and the guide spindle 9 cooperate with each other. Both ends of the valve body are fixed to the front end sheet 12 and the base plate 14 of the valve casing A, and the valve body V can be freely slidably mounted on the guide spindle 9 at its boss portion 11. Good.

In the above structure, the water flowing from the upstream side to the downstream side in the water passage B flows into the valve casing A from the through hole 13 of the guide plate 14 through the ring-shaped water passage gap 7, and the main flowing water is It flows out from the water outlet 1 of the valve casing A through the space between the main valve seat 2 and the main valve portion 4. On the other hand, the sub-stream water branched from the inside of the valve casing A into the communication hole 10 passes through the inside of the valve body V, passes between the sub-valve seat 3 and the sub-valve portion 5, merges with the main stream water, and flows out from the water outlet hole 1.

At this time, a pressure difference is generated between the upstream side and the downstream side of the differential pressure plate 6 due to the resistance when passing through the ring-shaped water passage gap 7, and the pressure difference causes the valve body V to move forward and backward to move the ring-shaped water passage. When the valve body V moves to a position where the amount of water passing through the water gap 7 and the spring load of the spring 8 of the valve body V are in balance and they stand still, the main valve seat 2 and the main valve portion 4, the sub valve seat 3 and the sub valve portion. The amount of water passing through the ring-shaped water passage gap 7 is automatically controlled to be constant by adjusting the opening degree of No. 5.

That is, when the pressure difference is large, the valve body V moves leftward in the drawing against the spring 8 and narrows the opening of the valve body V. When the pressure difference is small, the valve body V moves rightward in the drawing. The opening amount of the valve body V is expanded by moving with the pressing force of the spring 8 to keep the amount of water passing through the ring-shaped water passage gap 7 constant.

In the constant flow rate control by the forward / backward movement of the valve body V, the valve body V is guided by the guide spindle 9 to move forward / backward, so that the shake due to the water flow does not occur. Therefore, vibration noise and water flow noise do not occur.

The embodiment shown in FIGS. 2 and 3 is a case where the guide spindle 9 of the valve body V is provided with another functional portion.

In view of this, the embodiment of FIG. 2 is a check valve built-in type, in which the valve body V is slidably mounted on the guide spindle 9 and the base end side of the guide spindle 9 is extended. A check valve 16 is urged in a normally closed state by a spring 17 to be supported on a valve 15, and the check valve 16 is installed opposite to a valve seat 18 so as to be separable from the valve seat V and backflow of expansion water or the like due to post-boiling to the valve body V. It is equipped with a preventive function.

In the above structure, when water is passed, the catch valve 16 moves to the left in the drawing against the ridge 17 by the pressing force of the water pressure to guide the extension shaft 15 and separates from the valve seat 18 and opens. Speak. The constant flow rate control by the valve body V thereafter is surely performed without any trouble. Further, when water flow is stopped, the catch valve 16 is pressed against the valve seat 18 by the pressing force of the spring 17 to prevent backflow of expansion water and the like due to post-boiling.

In the embodiment of FIG. 2, other configurations and operations are the same as those of the embodiment of FIG. 1, and the same reference numerals are given to the same parts and the description thereof will be omitted.

The embodiment of FIG. 3 is of an element built-in type, and a connecting cylinder body 21 integrally provided with an operating shaft 20 of a thermoelement 19 provided on the downstream side of a constant flow water governor is provided at a tip of a valve casing A. The seat 12 is slidably inserted and supported in the center of the seat 12, and one end 8a of the valve body V is supported by the tip step portion 21a of the connecting cylinder body 21 and a guide spindle is attached to the tip protrusion 21b of the connecting cylinder body 21. One end of 9 is loosely inserted and a spring 23 of the spring 8 is attached between the spring receiver 22 attached to the base end of the connecting cylinder 21 and the valve casing A so that the spring load of the spring 8 can be adjusted by the water temperature. It is equipped with a function that can be changed to perform constant flow rate control that differs depending on the water temperature.

The spring 23 is for assisting when the load for pressing the element 19 is small, and is unnecessary if the necessary pressing force of the element 19 and the spring load of the spring 8 of the valve body V match. ..

In the above configuration, when the temperature of the water flowing through the water passage B is high, such as in summer, the thermoelement 19 detects this and pushes the connecting cylinder 21 to the right in the figure with its operating shaft 20. Then, the spring load of the spring 8 is increased (increased) to reduce the amount of control water, and when the amount of control water is low, such as in the winter, the thermo element 9 detects this and the connecting shaft 21 of the actuating shaft 20 By moving to the left in the figure and weakening (decreasing) the spring load of the spring 8 to increase the control water volume, different control water volumes can be obtained depending on the water temperature.

In the embodiment of FIG. 3, other configurations and operations are the same as those of the embodiment of FIG. 1, and the same parts are denoted by the same reference numerals and the description thereof is omitted.

[0032]

[Effect of the device]

 The constant-flow water governor of the present invention has a structure in which the valve body is guided by a guide spindle, so that vibration due to water flow does not occur.Therefore, vibration noise and passage caused by the vibration of the valve body peculiar to this type of water governor is generated. Noise such as water noise is eliminated.

Further, since the elastic body is not used, there is no possibility that the flow rate change due to the hysteresis phenomenon of elasticity and the change of the control water amount due to the frictional force will occur.

Further, since the constituent parts are only the valve casing, the valve body, and the guide spindle, not only can the water governor itself be made smaller and less expensive, but also the residual water after drainage is almost eliminated due to its structure. Since it does not exist, there is no problem caused by freezing as in the past.

Further, in the case where the check valve is provided on the guide spindle of the valve body, the function of controlling the constant flow rate by the water governor and the function of preventing the backflow of the expansion water due to the post boiling are contained in one unit. There is a convenience that can be combined.

Further, in the case where the spring load of the spring of the valve element is changed depending on the water temperature to obtain a different control water amount depending on the water temperature, when the water temperature is high, such as in the summer, and in the winter. It is convenient to automatically obtain a fixed amount of water when the water temperature is low such as.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a constant flow water governor according to the present invention.

FIG. 2 is a cross-sectional view of a check valve built-in type.

FIG. 3 is a cross-sectional view of a thermoelement built-in type.

[Explanation of symbols]

 1 Water outflow hole 2 Main valve seat 3 Sub valve seat A Cylindrical valve housing 4 Main valve part 5 Sub valve part 6 Differential pressure plate V Valve body 7 Water passage gap 8 Spring 9 Guide spindle

Claims (2)

[Scope of utility model registration request] 1. A main valve seat (2) and a sub valve in a tubular valve casing (A) having a main valve seat (2) and a sub valve seat (3) sandwiching a water discharge hole (1) in a peripheral wall. A differential valve plate (6) is provided upstream of the main valve part (4) and the auxiliary valve part (5) that come into contact with and separate from the valve seat (3) at the same time.
The cylindrical valve body (V) that integrally forms the valve body (V) is inserted in the circumferential surface of the differential pressure plate (6) with the water passage gap (7) in a ring shape so that the valve body (V) can be moved freely. The amount of water passing through the ring-shaped water passage gap (7) and the spring (8) by urging it upstream in (8).
In the constant flow water governor that automatically controls the water flow rate to a constant flow rate by balancing the spring load, the valve body (V) is held at the same axis as the tubular valve housing (A) by the guide spindle (9). A constant flow water governor. 2. A spindle (9) for guiding a valve body (V).
The constant flow water governor according to claim 1, wherein another functional part is additionally provided.