JPH0348650Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a constant flow water governor used in water passages of water heaters and the like.

(Prior Art and Problems) The present applicant previously proposed a structure of a constant flow water governor that does not require a diaphragm, as shown in FIG. 1, with the aim of making this type of water governor smaller and cheaper. However, according to experiments, when the water supply pressure increases, water becomes turbulent when it passes through the water passage hole B of the pressure receiving plate A, causing slight vibrations in the pressure receiving plate A, and further vibrations on the valve body C side cause the valve body to vibrate. It has been found that vibration noise and water flow noise are generated by amplifying the vibration of the pressure receiving plate A due to the non-uniformity of the secondary pressure in the area immediately after the hole D.

The present invention aims to solve the above-mentioned problems and provide a constant flow water governor that is small and inexpensive and does not generate noise.

(Means for solving the problem) It is formed into a cylindrical shape, and a valve chamber 7 is provided on the upstream side inside the cylindrical shape.
A secondary pressure chamber 8 is formed on the downstream side, and both chambers 7, 8
It has a main body 2 which communicates through a valve hole 9 and has a water inlet hole 10 in the peripheral wall on the valve chamber side, and a pressure receiving plate 4 having a water inlet 20 is slidably inserted into the secondary pressure chamber 8. The valve body 3 is inserted into the valve chamber 7 so that the conical main valve part 15 can move forward and backward into the valve hole 9, and the valve body 3 is urged downstream by the pressure spring 17. energize the tip of the valve body 3 to the pressure receiving plate 4.
The pressure receiving plate 4 is fitted into the fitting hole 22 of the pressure receiving plate 4.
An elastic ring 21 is fitted to the circumferential surface of the pressure receiving plate 4, and a water passage hole 20 is connected to a plurality of inlet side holes 20a around the fitting hole 22 of the pressure receiving plate 4, and an outlet side hole provided in the center of the pressure receiving plate 4. It is formed so as to converge at 20b.

(Function) Water flowing into the valve chamber 7 from the water inlet hole 10 passes through the valve hole 9 and flows out from the main body 2 through the water passage hole 20 of the pressure receiving plate 4.

At this time, the pressure receiving plate 4 is pushed downstream by a force corresponding to the product of the pressure difference between the upstream side and the downstream side of the pressure receiving plate 4 and the effective pressure receiving area of the pressure receiving plate 4, and the spring pressure of the governor spring 5 and The pressure receiving plate 4 is pushed upstream by a force corresponding to the difference in spring pressure from the pressure spring 17. The pressure receiving plate 4 moves to a position where these two forces are balanced,
A valve body 3 that is urged to come into contact with a pressure receiving plate 4
The main valve portion 15 moves by following the pressure receiving plate 4.
moves forward and backward into the valve hole 9, the opening degree of the valve hole 9 is adjusted, and the flow rate becomes constant.

At this time, the water flow passes smoothly through the water holes 20 of the pressure receiving plate 4 and flows in a substantially laminar flow state, so the pressure receiving plate 4 does not vibrate, and even if it begins to vibrate, it is absorbed by the elastic ring 21. Vibrations are damped.

(Example) This will be explained in detail based on the example shown in FIG. 3,
It consists of a pressure receiving plate 4, a governor spring 5, and a cylindrical main body 6 that accommodates these. The main body 6 has a valve chamber 7 on the upstream side that accommodates the valve body 3 and a secondary pressure chamber 8 on the downstream side into which the pressure receiving plate 4 can be slidably inserted, and both chambers 7 and 8 are formed with a valve hole 9. communicate. Several water inlet holes 10 are provided at equal intervals on the side of the valve chamber 7, and a main valve seat 11 forms a valve hole 9 by sandwiching the water inlet holes 10, and a sub valve seat protrudes annularly into the valve chamber 7. 12, and a sub-valve seat 12.
The valve chamber 7 is connected to the main valve chamber 13 on the side including the water inlet hole 10.
and a sub-valve chamber 14, while the valve body 3 has a main valve section 15 located within the main valve chamber 13 and facing the main valve seat 11.
and the sub-valve part 16 located in the sub-valve chamber 14 and facing the sub-valve seat 12 are both conical, and both valve parts 15, 16
are provided so that they simultaneously approach and separate from the respective corresponding valve seats 11 and 12. 17, the tip of the valve body 3 is the pressure receiving plate 4
A pressure spring 18 is a communication hole provided in the main valve portion 15, which communicates the auxiliary valve chamber 14 and the secondary pressure chamber 8 through the center of the valve body. ing. Reference numeral 19 denotes a spring receiving plate fixed to the main body 6, and the aforementioned governor spring 5 is interposed between the spring receiving plate 19 and the pressure receiving plate 4 to urge them to repel each other. 20 is a water hole formed in the pressure receiving plate 4;
Several holes 20a are drilled diagonally from around the fitting part with the tip of the valve body 3 toward the center of the pressure receiving plate 4, and a hole 20b on the outlet side is drilled at the center of the pressure plate continuous with these holes 20a. It consists of 21 is an elastic ring with a U-shaped cross section fitted onto the circumferential surface of the pressure receiving plate 4;
It is in elastic contact with the inner surface of the secondary pressure chamber 8. Further, the pressure receiving plate 4 is provided with a tapered fitting hole 22 into which the tip of the valve body 3 is fitted, and the conical main valve portion 15 is fitted into the hole 22 to hold the valve body 3.

Numeral 23 is a nut that fixes the main body 6 within the passageway 1.

In this configuration, water flowing into the valve chamber 7 from the water inlet hole 10 passes through the valve hole 9 and flows through the water hole 2 of the pressure receiving plate 4.
It flows out from subject 2 through 0.

At this time, due to the resistance when passing through the water passage hole 20 of the pressure receiving plate 4, a pressure difference occurs between the pressure on the upstream side and the pressure on the downstream side of the pressure receiving plate 4 in the secondary pressure chamber 8, and this pressure difference and the pressure receiving pressure The pressure receiving plate 4 is pushed downstream by a force corresponding to the product of the effective pressure receiving area of the plate 4, and the pressure receiving plate 4 is pushed downstream by a force corresponding to the difference between the spring pressure of the governor spring 5 and the spring pressure of the pressing spring 17. Pushed upstream. The pressure receiving plate 4 moves to a position where the two forces are balanced, and the valve element 3, which is urged to contact the pressure receiving plate 4, follows the pressure receiving plate 4 and moves, so that the main valve portion 15 closes in the valve hole. 9, the opening degree of the valve hole 9 is adjusted. That is, when the pressure difference becomes large, the pressure receiving plate 4 and the valve body 3 move downstream, causing the main valve part 15 of the valve body 3 to reduce the opening degree of the valve hole 9, and conversely, when the pressure difference becomes small, the pressure receiving plate 4 and the valve body 3 move downstream. 4 and the valve body 3 move upstream to increase the opening degree of the valve hole 9. Therefore, even if the water supply pressure fluctuates, the flow rate remains constant.

By the way, in the present invention, as mentioned above, the water passage holes 20 are concentrated at the center of the pressure receiving plate 4 through the holes 20b, and the ring 21 is arranged around the circumference, and the elasticity of the ring 21 moves the pressure receiving plate 4 into the secondary pressure chamber 8. Since the water flow passes through the hole 20 smoothly and flows in a substantially laminar flow state, the pressure receiving plate 4 will not vibrate, and even if it starts to vibrate, the ring 21 will not vibrate. It is absorbed and attenuated, and has the effect of preventing noise such as vibration noise and water flow noise as described above in the conventional art. In addition, the valve body 3 is connected to the fitting hole 2 of the pressure receiving plate 4.
2, it is also possible to prevent the valve body 3 from rolling horizontally, which would cause turbulent flow and cause the pressure receiving plate 4 to vibrate.

(Effects of the invention) The constant flow water governor of the invention has the excellent effects described above. That is, since no diaphragm is used, it can be constructed compactly and inexpensively, and does not generate noise such as vibration noise or water flow noise.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a conventional example, and FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention. 3... Valve body, 4... Pressure receiving plate, 5... Governor spring, 6... Main body, 7... Valve chamber, 8... Secondary pressure chamber,
9... Valve hole, 10... Water inlet hole, 15... Main valve part,
17...Press spring, 20...Water hole, 21...Elastic ring, 22...Fitting hole.

Claims (1)

[Scope of utility model registration request] It is formed into a cylindrical shape, and a valve chamber 7 is provided on the upstream side inside the cylinder.
A secondary pressure chamber 8 is formed on the downstream side, and both chambers 7, 8
It has a main body 2 which communicates through a valve hole 9 and has a water inlet hole 10 in the peripheral wall on the valve chamber side, and a pressure receiving plate 4 having a water inlet 20 is slidably inserted into the secondary pressure chamber 8. The valve body 3 is inserted into the valve chamber 7 so that the conical main valve part 15 can move forward and backward into the valve hole 9, and the valve body 3 is urged downstream by the pressure spring 17. energize the tip of the valve body 3 to the pressure receiving plate 4.
The pressure receiving plate 4 is fitted into the fitting hole 22 of the pressure receiving plate 4.
An elastic ring 21 is fitted to the circumferential surface of the pressure receiving plate 4, and a water passage hole 20 is connected to a plurality of inlet side holes 20a around the fitting hole 22 of the pressure receiving plate 4, and an outlet side hole provided in the center of the pressure receiving plate 4. A constant flow water governor characterized in that it is formed so as to converge at 20b.