JPS6234891B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of a flush valve, and its purpose is to provide a flush valve that can save water by shortening the water discharging time with a large instantaneous flow rate and reducing the total amount of water discharged. We aim to provide the following.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

The drawings show a first embodiment in FIGS. 1 to 9, and a second embodiment in FIGS. 10 to 14.

First, the first embodiment will be explained. In the figure, 1 is a flush valve main body, 2 is an inlet thereof, and 3 is an outlet thereof, and these two ports 2 and 3 communicate with each other via a main valve seat 4.

The main valve seat 4 is formed to protrude into the main body flow path and has a valve hole 33.
It consists of an annular valve seat packing 4a disposed on the valve seat wall 34 having an annular mesh 4a and an annular net 4b fitted on the inner circumferential surface thereof so that the inner circumferential surface is substantially flush with the circumferential surface of the valve hole 33. The annular mesh body 4b is constructed by covering a core made of stainless steel or the like with a mesh material.

Further, reference numeral 5 denotes an opening opened opposite to the main valve seat 4, and this opening 5 is closed by a lid 6 having an adjustment screw 7 at the center of the top surface.

8 is a valve body, which includes an upper valve body 8a and a lower valve body 8b.
The valve body 8 is formed by screwing together both 8a and 8b. In the illustrated example, a piston is used as the valve body 8.

The lower valve body 8b has a main valve body 9 and a guide vane piece 10, and the upper valve body 8a of the valve body 8 has an upper part on the inner peripheral surface of the lid 6 and a guide vane piece 10 of the lower valve body 8b on the main valve seat. It is arranged so as to be able to freely slide on the inner circumferential surface of the annular mesh body 4b of No. 4 and the inner circumferential surface of the valve hole 33.

Note that a groove 29 is provided in the sliding surface 39 of the guide vane piece 10 in the axial direction.

Further, behind the valve body 8, a pressure chamber 11 is formed by the upper valve body 8a of the valve body 8 and the lid 6, and the main valve body 9 is made to correspond to the main valve seat 4 to constitute the main valve A.

Further, the valve body 8 has first, second, and
Three third communicating portions 12, 13, and 14 are provided, and the upper valve body 8a and the lower valve body 8b communicate with the pressure chamber 11 via a passage 15 provided in the upper valve body 8a, and the lower valve body A relief valve chamber 17 is formed which communicates with the outlet 3 side, that is, the secondary side, via a relief valve seat 16 provided at 8b.

The first and second communication portions 12 and 13 have control valves B and C, respectively, and communicate the pressure chamber 11 with the primary side via the control valves B and C, and the third communication portion 14 has a small hole shape. The pressure chamber 11 is directly connected to the primary side.

The control valves B and C have control valve seats 18 and 19 provided at the communication portions of the first and second communication portions 12 and 13 opening on the upper surface of the valve body 8 to the pressure chamber 11 side, respectively, and control valve seats 18 and 19 provided on the upper surface. The valve shafts 20 and 21 are connected to the control valve seats 18 and 19.
The communication part 1 is inserted through the
The control valve bodies 22 and 23 are arranged in the communication parts 12 and 1.
3, so as to ride on stepped portions 24, 25 provided in the middle, and a water passage gap exists between the control valve bodies 22, 23 and the wall surfaces of the communicating portions 12, 13. (Hereinafter, the control valve B provided in the first communication portion 12 will be referred to as a first control valve, its control valve seat 18 will be referred to as a first control valve seat, and the corresponding control valve body 22 will be referred to as a first control valve body. The control valve C provided in the two communication portion 13 is referred to as a second control valve, the control valve seat 19 thereof is referred to as a second control valve seat, and the corresponding control valve body 23 is referred to as a second control valve body). The valve shaft 20 of the body 22 faces the inner top surface of the lid 6, and the valve shaft 21 of the second control valve body 23 faces the lower surface of the adjustment screw 7. The length of the former 20 is approximately longer than that of the latter 21. The distance from the first control valve seat 18 to the stepped portion 24 is also longer than that from the second control valve seat 19 to the stepped portion 25. The first and second control valve bodies 22 and 23
The heights of the upper ends of the valve shafts 20 and 21 are the same.

Further, the second communication section 13 is directly connected to the primary side, but the first communication section 12 is formed so as to communicate with the primary side via the second communication section 13, and the second communication section 12 is formed to communicate with the primary side via the second communication section 13.
The diameter of the communication part 26 to the communication part 13 is the same as that of the second communication part 1.
3, but it is still about three times the minimum diameter of the third communication part 14, and the water flow area is smaller than the water flow area when the first control valve B is open. to form.

Reference numeral 27 denotes a relief valve body that corresponds to the relief valve seat 16 and constitutes the relief valve D. A cylindrical rod guide 28 is integrally provided on the lower surface of the relief valve body 27, and the rod 30 is made to be able to slide freely on this rod guide 28 and not to fall off. These rod guides 28 and rods 30 are disposed in the relief valve chamber 17 so as to loosely fit through the relief valve seat 16 and extend toward the outlet 3, and are constantly pressed against the relief valve seat 16 by the spring 31. Ru. The spring 31 is made of a coil spring, and is arranged in the relief valve chamber 17 behind the relief valve body 27, with one end on the back surface of the relief valve body 27 and the other end on the ceiling surface of the relief valve chamber 17, that is, the upper part of the valve body 8. They respectively abut against the valve body 8a.

Reference numeral 32 is a push rod which is supported by a support member 35 so as to be able to reciprocate, its tip facing close to the lower side surface of the rod 30, and its base end being elastically pressed by a spring 36 to elastically communicate with the handle 37 to push the handle 37. It moves forward against the spring 36, and when released, it returns to its original position due to the elastic force of the spring 36. Note that 38 is a strainer.

As shown in FIG. 4, in such a flush valve, normally, the main valve body 9 is pressed against the main valve seat 4 to shut off the inlet 2 and the outlet 3, and the relief valve body 2
7 is pressed against the relief valve seat 16 by the spring 31 to shut off the pressure chamber 11 and the secondary side, and the first and second control valve bodies 22 and 23 are closed by their own weight to the first and second communication portions 12 and 13, respectively. It sinks inward and rests on the steps 24 and 25.

Now, when the handle 37 is operated and the push rod 32 is pushed, the push rod 32 moves forward, and through the rod 30 and the rod guide 28, the relief valve body 27 is resisted against the spring 31, tilted, and released from the relief valve seat 16. Open valve D. Therefore, the water in the pressure chamber 11, the passage 15, and the relief valve chamber 17 is released to the secondary side, and as the pressure in the pressure chamber 11 becomes lower than the pressure of the water in the primary side, the valve body 8 rises. , the main valve body 9 separates from the main valve seat 4, the main valve A opens, and water begins to flow from the inlet 2 to the outlet 3. At this time,
The first and second control valve bodies 22 and 23 are pushed up by the water pressure and pressed against the first and second control valve seats 18 and 19, respectively, thereby closing the first and second control valves B and C, respectively. (Figure 5).

Subsequently, as the valve body 8 rises, the rod 3
0 is pulled up and rides on the push rod 32, and when the rod guide 28 and rod 30 become slidable, the relief valve body 27 is pressed against the relief valve seat 16 by the spring 31, and the relief valve D is closed.

On the other hand, before the relief valve D closes, the valve stem 20 of the first control valve body 22 hits the lid 6, and the first control valve B
begins to open, and then the valve stem 21 of the second control valve body 23 opens.
hits the adjustment screw 7, and the second control valve C begins to open.

However, since the water flowing into the pressure chamber 11 flows out from the relief valve D, the valve body 8 continues to rise.

After the valve body 8 is completely raised, the pressure chamber 11 is opened to the first, second, and third pressure chambers because the relief valve D is closed.
The volume increases due to the water flowing in from all the communication parts 12, 13, and 14. (Fig. 6) At this time, since the second communication portion 13 has a particularly large water flow area compared to the first and third communication portions 12 and 14, a larger amount of water flows than the second communication portion 13. flows into the pressure chamber 11, the pressure chamber 11 rapidly increases its volume, and the valve body 8 rapidly descends.

Then, the valve body 8 descends to a certain position, and the second
When the valve stem 21 of the control valve body 23 comes out of contact with the adjustment screw 7, the second control valve body 23 is pushed up by the water pressure and comes into pressure contact with the second control valve seat 19, and the second control valve C is completely closed. From this point on, the pressure chamber 11 slowly increases its volume in response to the water coming in from the first communication part 12 via the first control valve B and the water coming in from the third communication part 14, The valve body 8 slowly descends. (Fig. 7) By adjusting the position of the adjustment screw 7, the closing timing of the second control valve C can be changed, and the time during which the valve body 8 rapidly descends, that is, the time when the instantaneous flow rate is large, can be changed. The total drainage amount can be adjusted.

Then, when the valve body 8 further descends to a certain position and the valve shaft 20 of the first control valve 22 comes out of contact with the lid 6, the first control valve B also closes, and from now on, the third communication valve In response to the small amount of water that comes into the pressure chamber 11 only from the portion 14, the valve body 8 slows down its descent speed and slowly descends. (Fig. 8) At this time, when the valve element 8 descends and the lower end of the sliding surface 39 of the guide vane piece 10 of the lower valve element 8b reaches the upper end of the inner peripheral surface of the annular net 4b, the sliding surface of the guide vane piece 10 Moving surface 3
Although the flow rate is restricted by the gap between the annular net 4b and the inner peripheral surface of the annular net 4b, a small amount of water continues to flow because the annular net 4b has a structure in which the core is covered with a mesh material.

Next, when the lower end of the sliding surface 39 of the guide vane piece 10 reaches the upper end of the circumferential surface of the valve hole 33, the flow rate is finally throttled due to the gap between the sliding surface 39 of the guide vane piece 10 and the inner circumferential surface of the valve hole 33. go.

However, when the lower end of the groove 29 reaches the lower end of the inner circumferential surface of the valve hole 33 (the upper end of the groove 29 faces the inner circumferential surface of the annular mesh), the water on the inlet 2 side connects with the upper end of the groove 29 and the annular mesh. The fluid passes through the gap in the inner peripheral surface of the body 4b, passes through the groove 29, and is discharged to the outlet 3 side with a temporarily increased flow rate.

Finally, the valve body 8 is lowered, the main valve body 9 is seated on the main valve seat 4, and the main valve A is completely closed.

The first and second control valve bodies 22 and 23 sink into the husband and wife first and second communication parts 12 and 13 due to their own weight,
After completing one operation, the state returns to the state shown in FIG. In this way, the amount of discharged water increases once just before the main valve A closes, and then closes.

Therefore, when using a siphon type toilet bowl, a siphon jet type toilet bowl, etc., a stable and fixed amount of sealed water can be reliably supplied to the toilet bowl.

On the other hand, the rod 30 is seated on the push rod 32 as the valve body 8 descends, but since the rod guide 28 slides on the rod 30, it descends together with the valve body 8 to keep the relief valve D in the closed state.

After this, even if the push rod 32 is moved back, the rod 30 only descends and there is no change in its operation.

Therefore, even if the push rod 32 is pushed away, the main valve A is reliably closed.

A graph of changes in instantaneous flow rate from opening to closing of the main valve of the flush valve of the present invention and the conventional flush valve as described above is shown in FIG. 9.

Conventional flush valves have a structure in which the raised valve body is slowly lowered by water flowing into the pressure chamber through one communication part (small hole), and the instantaneous flow rate is gradually reduced. A large amount of water is discharged,
Water was being wasted.

In the flush valve of the present invention, when the valve body 8 is raised to the maximum and the main valve A is fully opened, the amount of water flowing into the pressure chamber 11 from all the communication parts 12, 13, 14 becomes maximum, The valve body 8 rapidly descends and the main valve A
By rapidly reducing the opening degree of , the amount of water flowing into the pressure chamber 11 is gradually throttled, the valve body 8 is lowered step by step, and the main valve A is gradually closed, thereby discharging water with a large instantaneous flow rate. By shortening the time, the total amount of water discharged can be reduced. Moreover, the opening time of the main valve A is shortened, and the water spouting time is also shortened.

Next, a second embodiment shown in FIGS. 10 to 14 will be described.

The flash valve of the second embodiment has a first communication part 40 equipped with a control valve E for communicating the pressure chamber 11 and the primary side, and a small hole that directly connects the pressure chamber 11.
This is different from the flush valve of the first embodiment in that it has two communicating parts, a second communicating part 41, which communicates with the primary side.

The control valve E has a valve shaft 4 protruding from the upper surface of the control valve body 42.
The control valve seat 44 has an inner diameter slightly larger than the large diameter portion 43a of the valve shaft 43. has been done.

Further, the control valve body 42 has a gap between it and the inner wall surface of the first communication part 40, and as shown in FIG. The small engaging portion 43b of the valve shaft 43 projects slightly upward from the control valve seat 44 and faces into the pressure chamber 11. In addition, the control valve body 42
The gap between the inner wall of the first communicating portion 40 and the valve shaft large diameter portion 43 is
The water flow area is larger than the gap between a and the control valve seat 44.

When the push rod 32 moves forward by operating the handle 37, the relief valve D opens and the water in the pressure chamber 11 is discharged, and the pressure of the water on the primary side opens the main valve A.
The valve element 8, which is a piston equipped with a main valve element 9, begins to rise, the main valve A opens, and at the same time, the control valve element 42 is pushed up by water pressure, closing the control valve E.
(FIG. 12) Subsequently, when the valve body 8 rises, the valve shaft 43 of the control valve body 42 hits the lid 6, and the control valve E opens.

During this process, the water flowing into the pressure chamber 11 flows out from the relief valve D, so the valve body 8 rises, and the rod 30 is pulled up and rides on the push rod 32, allowing the rod guide 28 and rod 30 to slide freely. The relief valve body 27 is then pressed against the relief valve seat 16 by the spring 31, and the relief valve D is closed, as in the first embodiment.

When the valve body 8 reaches its full height, the first and second communication portions 40, 4
The volume of the pressure chamber 11 increases due to the water flowing in from 1, and the valve body 8 begins to fall, but when the valve body 8 rises the most, the small diameter portion 43b of the valve shaft 43 of the control valve body 42 becomes the control valve. The seat 44 is inserted, and the amount of water flowing into the pressure chamber 11 is maximized.

Therefore, the pressure chamber 11 rapidly increases in volume, and the valve body 8 rapidly descends. (FIG. 13) When the valve body 8 descends to a certain position, the valve shaft 43 of the control valve body 42 passes through the control valve seat 44 with its large diameter portion 43a, and the control valve E
limits the amount of water flowing into the pressure chamber 11, so the lowering speed of the valve body 8 becomes slower. (Fig. 14) Subsequently, when the valve body 8 further descends, the control valve body 4
The contact of the valve stem 43 of No. 2 with the lid 6 is removed, and the control valve body 42 is pressed against the control valve seat 44 by water pressure, closing the control valve E, and the pressure chamber 11 passing through the first communication portion 40
Water no longer flows into the second communication section 41
In response to the small amount of water that enters the pressure chamber 11, the valve body 42 further slows down and slowly descends, and the main valve body 9 seats on the main valve seat 4 and the main valve A closes. , the state shown in FIG. 10 is reached.

Then, the control valve body 42 sinks into the first communication portion 40 due to its own weight, completing one operation and returning to the state shown in FIG. 11.

The return of the rod 30 is performed in the same manner as in the first embodiment.

In addition, the control valve B of the flash valve of the present invention,
C and D are not limited to the above embodiments, and the structure of the control valve or the number of control valves provided may be arbitrary, and the number of communication portions may also be arbitrary.

In short, any method that reduces the amount of water flowing into the pressure chamber 11 in multiple stages is sufficient.

Further, the valve body 8 may be composed of one member instead of the two members of the upper valve body 8a and the lower valve body 8b, and its structure may be a diaphragm type instead of a piston type. Furthermore, the rod 30 may be provided to slide on the outer peripheral surface of the rod guide 28 of the relief valve body 27, or the relief valve body 27 and the rod 30 may be formed integrally as in the conventional flush valve.

Further, when used in a toilet bowl that does not require a particular amount of sealed water to be supplied, the groove 29 on the sliding surface 39 of the guide vane piece 10 may not be provided.

The present invention is constructed as described above, and a control valve is provided in the communication section that communicates the pressure chamber with the primary side to reduce water flowing into the pressure chamber through the communication section in multiple stages. When the pressure rises to its highest level and the main valve is fully open, the amount of water flowing into the pressure chamber reaches its maximum.
The pressure chamber rapidly increases its volume and rapidly pushes down the valve element to reduce the opening of the main valve, thereby shortening the water discharging time with a high instantaneous flow rate and reducing the total drainage volume without reducing the instantaneous flow rate. You can save water by doing so.

In addition, the water flowing into the pressure chamber is controlled by a control valve so that the amount of water flowing into the pressure chamber is reduced in multiple stages.
The descending speed of the valve body is fast at first, and then gradually slows down, so that the main valve closes slowly and does not cause water hammer. Moreover, the water spouting time can be shortened.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show embodiments of the flush valve of the present invention, with FIGS. 1 to 9 showing the first embodiment, and FIGS. 10 to 14 showing the second embodiment. FIG. 1 is a longitudinal cross-sectional view of the flash valve in the first embodiment, showing the state immediately after the control valve is closed, FIG. 2 is a cross-sectional view taken along the line ``-'' in FIG. 4 to 8 are longitudinal sectional views showing operating states, and FIG. 9 is a graph showing a discharge curve, where A is a discharge curve of a conventional flush valve;
B shows the discharge curve of the flush valve of the present invention. FIG. 10 is a longitudinal sectional view of the flush valve in the second embodiment, showing the state immediately after the control valve is closed. FIGS. 11 to 14 are longitudinal sectional views showing the operating state of the main parts. In the figure, 1... flash valve body, 4... main valve seat, 8... valve body, 11... pressure chamber, 12... communicating section, 13... communicating section, 14... communicating section, 40...
...Communication part, 41...Communication part, A...Main valve, B...
Control valve, C... Control valve, D... Relief valve, E...
...control valve.

Claims (1)

[Claims] 1 A relief valve that forms a pressure chamber behind the main valve by a valve body that corresponds to the main valve seat provided in the flash valve body and constitutes the main valve, and connects the pressure chamber to the secondary side through the valve body. and a communication part that connects the pressure chamber to the primary side, and a control valve that reduces water on the primary side that flows into the pressure chamber through the communication part stepwise and multiple times. .