JP3533468B2 - Fluid control valve - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid control valve mainly used for door-to-door water supply / hot water supply equipment, more specifically, a forced valve opening mechanism or bypass mechanism, and a pressure reducing valve and pressure reducing valve equipped with a forced closing mechanism. It relates to a constant flow valve or a constant flow valve.

[0002]

2. Description of the Related Art For example, in a water supply and hot water supply system for each house of an apartment house, a sluice valve, a fluid control valve, a water stopcock, a water meter, and a sluice valve are sequentially installed in a pipe to one dwelling unit. Then, during the initial water flow after the construction of the pipes incorporating these valves is completed, the solid foreign matter remaining in the pipes may be caught in the fluid control valve or the water meter, causing damage or impairing its normal function. It may happen.

Therefore, as shown in FIG. 12, a sluice valve 102, a pressure reducing valve substitute pipe 103, a water stopper 104, a water meter substitute pipe 105, and a sluice valve 106 are installed in this order in the sluice valve 102, 106, With the water shut-off plug 104 fully opened, initial water is passed to clean the inside of the pipe 101 to remove and remove irregular foreign matter, and then the substitute pipes 103 and 105 are removed to reduce the pressure.
7. A water meter 108 is installed.

For this reason, it is necessary to carry out the double work of installing and removing the substitute pipes 103 and 105, and installing the pressure reducing valve 107 and the water meter 108 in two places per pipe 101 of one dwelling unit, which complicates the facility work. In addition to the above, there are problems that the construction cost is high and it is difficult to shorten the construction period. Further, even when the pipe does not have a water meter, a substitute pipe is required for a fluid control valve such as a pressure reducing valve, and these problems are held.

Further, when the pressure reducing valve 107 is equipped with a strainer, when cleaning or replacing the strainer, or the water meter 1 installed on the pressure reducing valve 107 itself or its secondary side.
It is necessary to stop the flow of water when performing maintenance and inspection of equipment such as 08.
Since 04 must be installed, simplification of the piping structure and reduction of equipment cost cannot be achieved.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a substitute pipe is installed in place of a fluid control valve where foreign matter is apt to be caught when the foreign matter in the pipe is removed and cleaned by completing the construction of the pipe and performing initial water passage. The construction is complicated and it is difficult to reduce the construction cost and the construction period.In addition to this, a water stopcock is required to clean the equipment inside the pipe, replace parts, and perform maintenance inspection. It aims to solve the problem that the structure cannot be simplified and the facility cost cannot be reduced.

[0007]

According to the present invention, there is provided a valve seat provided in a flow path from a fluid inlet to an outlet, and a difference between a secondary side fluid pressure and a load or spring force or a primary side pressure opposing thereto. A valve body that operates in accordance with the above, and the valve seat and the valve body cooperate with each other to solve the above-mentioned problem derived from a pipe incorporating a fluid control valve for controlling either or both of fluid pressure and flow rate. By providing a solution to the fluid control valve itself, this eliminates the need for a substitute pipe to protect the fluid control valve during initial water flow, simplifying piping work, reducing construction costs, and shortening the construction period. It was decided to achieve the objectives of simplifying the piping structure and reducing facility costs by eliminating the need for a water stopcock for cleaning equipment, replacing parts, and stopping water flow during maintenance and inspection.

That is, the present invention includes, as a first means, a manual forced valve opening mechanism for holding the valve element in the valve opening position .
One of the forced valve opening mechanism is the upper limit of the adjusting spring which is the counter load.
Project the upper end of the adjusting screw with the screw on the spring case.
And the insertion hole formed through this adjustment screw.
It has a push rod that is inserted into the insertion hole, and
The valve-opening jig that fits in the same direction
The push rod passes through the insertion hole and
Press the operating diaphragm to hold it at the maximum opening position
It was done so. Another forced valve opening mechanism is the secondary chamber
Of the guide rod of the valve body that is inserted through the guide hole of the valve body
A male screw portion provided at the tip and exposed to the outside of the valve body,
With a valve opening jig that has a screw hole that fits into this male screw part
Consists of the screw hole and the male screw
To hold the guide rod and valve at the maximum opening position by pulling
It was done.

As a second means of the present invention, the flow channel
Side flow path that connects the primary side and the secondary side without passing through the valve seat
Is installed to connect the primary side to the secondary side via either the valve seat or the side flow path.
It was equipped with a manual flow path switching mechanism that communicates with the secondary side. Flow
One of the path switching mechanisms is screwed to the valve body and moves linearly back and forth.
It has a valve shaft and a valve element provided at its tip, and the primary side is the secondary side.
And the position where it communicates via the valve seat with the side flow passage
The anterior body is alternately placed at the position.
Another flow path switching mechanism is installed at the branch point from the primary side of the side flow path.
It has a valve body that is placed and rotates, with the primary side as the secondary side and the valve seat
In the position to communicate with each other and the position to communicate via the side flow path
The valve bodies are arranged alternately.

Further, according to the present invention, as a third means, the primary side
A side channel is provided to connect the secondary side with the secondary side without passing through the valve seat.
Manual operation to close the primary side downstream from the side flow path branching point
And a manual closing mechanism to close the side channel
I let it go. These two closing mechanisms are screwed onto the valve body
A linearly reciprocating valve shaft and a valve element provided at its tip,
Valves to separately close the primary and side flow paths
It allows the body to work independently of each other.

[0011]

The fluid control valve of the present invention is incorporated in the pipe at the time of construction, and when performing initial water passage for internal cleaning, in the case of the first means, the valve opening is maximized by the forced valve opening mechanism. In the case of the second means, the valve seat side is closed by the flow path switching mechanism to open the side flow path, and in the case of the third means, the valve seat side is closed by the primary side closing mechanism. close. As a result, the initial water flow flows without the solid foreign matter being caught in the regular flow path or the temporarily opened side flow path.

Further , cleaning, parts replacement, and holding inspection are performed.
At this time, especially in the second means, by the flow path switching mechanism,
With the third means, the flow of fluid is stopped by the closing mechanism.
It is possible to make it easy.

[0013]

Embodiment 1] Figure 1, 2 and 3 there is shown an embodiment of the invention as <br/> claim 1 of the first invention, a flow path formed inside the valve body 1 A valve seat 3 having a seat surface facing downward is provided at an intermediate portion of the valve 2, and a primary chamber 5 above the valve seat 3 communicates with a primary passage 6 of the flow path 2 and a secondary chamber 7 below communicates with a secondary passage 8. ing. A disk-shaped valve body 10 is inserted in the secondary chamber 7, and the valve body stem 11 is fixed to the secondary chamber 7 and penetrates through the valve seat hole 4 and the primary chamber 5 to extend upward. It is connected to a piston 13 which is fitted in a liquid-tight manner in a piston guide hole 12 formed through the valve body 1 at the upper side. In addition, a guide rod 14 extending downward from the valve body 10 through the secondary chamber 7 is inserted into a guide hole 16 of the lower lid body 15 of the valve body 1, and the valve body 10 and the lower lid body 15 are connected to each other. A valve closing spring 17 made up of a compression coil spring is inserted between them.

A spring case 18 is mounted above the valve main body 1, and a nut-shaped diaphragm stem 21 is secured to the piston 13 by a bolt 20 so as to be superposed on the central lower surface of a diaphragm 19 having an outer peripheral edge sandwiched therebetween.
The fitting hole 22 opened to the upper surface is fitted with the tip in contact with the hole bottom.

In the pressure reducing valve, the diaphragm and the valve body are directly connected by the stem, and normally these are always moved together, but as in this embodiment, they are moved together with the valve body 10. If the diaphragm stem 21 that moves integrally with the valve body stem 11 and the diaphragm 19 are fitted together and move separately, the diaphragm 19
Even when the high pressure fluid acts during initial water flow, pressure resistance / airtightness test, or leakage from the primary side, the valve body 10 is pulled by the diaphragm 19 even if it moves more than the valve closing stroke of the valve body 10. It is prevented that the valve seat 3 comes into contact with the valve seat 3 only by the spring force of the valve closing spring 17 without being bitten.

Further, even when the valve is normally closed, at the end of the valve closing, the valve seat 3 is seated only by the spring force of the valve closing spring 17, and even if the secondary side fluid pressure rises sharply, there is no impact. There is an advantage that the valve can be closed.

An adjusting screw 23 is arranged on the central axis of the spring case 18, and the upper end of the adjusting screw 23 projects upward from the spring case 18, is fixed by a lock nut 24, and is covered with a cap 25. Spring case 1
Reference numeral 8 is a non-circular plane, and an upper spring receiver 26 screwed on the adjusting screw 23 is inscribed therein to be movable up and down.

An adjusting spring 28, which is a compression coil spring, is fitted between the upper spring bearing 26 and the lower spring bearing 27 which is superposed on the upper surface of the diaphragm 19, and serves to connect the upper surface of the valve body 1 and the lower surface of the diaphragm 19. The diaphragm chamber 29 in between is connected to the secondary passage 8 by the pressure detection passage 30.

With the above construction, when the secondary side fluid pressure is detected by the diaphragm 19 and an imbalance occurs with the spring force of the adjusting spring 28 which opposes it, the valve body 1 is interlocked with the movement of the diaphragm 19.
No. 0 is for opening and closing operation.
It has the same function as a widely known pressure reducing valve as seen in Japanese Patent No. 4 publication.

Next, the manual forced valve opening mechanism 3 according to the present invention.
1 will be described. In this embodiment, a jig main body having an insertion hole 32 penetratingly formed in the adjustment screw 23, a push rod 33 inserted into the insertion hole 32, and a female screw portion 34 screw-fitted to the adjustment screw 23. The valve opening jig 37 includes a knob 35 and a knob 36 attached thereto. A seal plug 38 is tightly fitted to the lower end of the insertion hole 32 so as to be movable in the axial direction.
The seal plug 38 prevents fluid from flowing out through the insertion hole 32 when the diaphragm 19 is broken.

The pressure reducing valve of this embodiment provided with such a forced valve opening mechanism 31 is built into the pipe from the beginning without using a substitute pipe when constructing the pipe. And cap 2
5, the adjusting screw 23 is rotated and the upper spring receiver 26 is lowered to compress the adjusting spring 28, which overcomes the spring force of the valve closing spring 17 and causes the diaphragm stem 21 to move to the piston 1
3 is pushed down and the valve body 10 is opened to the maximum opening degree. Next, the push rod 33 of the valve opening jig 37 is inserted into the insertion hole 32, and the female screw portion 34
When the screw is screwed into the adjusting screw 23, the tip of the push rod 33 brings the seal plug 38 into contact with the head of the bolt 20 to push the diaphragm 19 , and the diaphragm stem 21, the piston 13,
The valve body 10 is held at the maximum opening position via the valve body stem 12 (see FIG. 3 ).

In this state, when initial water is passed to clean the inside of the pipe, the valve body 10 is mechanically fixed even if the water pressure is high.
Since the maximum opening is stably maintained, the gap with the valve seat 3 is large, and therefore solid foreign matter such as metal chips flows without being caught and flows out of the pipe to be removed.

When the internal cleaning is completed and the initial water supply is stopped, the valve opening jig 37 is removed from the adjusting screw 23, and the adjusting screw 23 is rotated in the opposite direction to set the adjusting spring 28 to a predetermined set load. The upper spring support 26 is raised to the position, and the cap 25 is covered to bring it to the state of FIG. 1 so that it functions as an original pressure reducing valve. In addition, do not lower the upper spring support 26 first.
Screw the male screw part 34 into the adjusting screw 23 to attach it to the push rod 33.
Even if the diaphragm 19 at the valve closing position is pushed, the valve body 10
It can be opened and held at the maximum opening position.

Further, in this embodiment, the valve opening 41 formed in the primary passage 6 and the closing cap 42 screwed and fixed to the valve body 1.
Valve body 4 provided at the tip of a valve shaft 43 that is threaded through
4 is provided with a manual closing mechanism 40 .

The shut-off valve element 44 is inserted into and removed from the valve port 41 from the upstream side of the primary passage 6 to open and close the flow passage 2,
A cylindrical strainer 48 attached to a strainer plug 47 screwed into the valve body 1 is inserted downstream of the valve port 41 (see FIG. 2).

In the pressure reducing valve of this embodiment having the closing mechanism 40 as described above, the closing valve body 44 is retracted to a position in contact with the closing cap 42 to perform initial water flow and to function as an original pressure reducing valve. . When the strainer 48 is to be cleaned or replaced, or the pressure reducing valve itself or other equipment is to be maintained and inspected, the valve shaft 43 is deeply screwed into the closing cap 42 so that the closing valve body 44 is tightly fitted into the valve opening 41. The passage 2 is closed and the fluid flow is stopped.

When the cleaning, replacement of parts, and maintenance / inspection of the equipment in the pipe are completed, the valve shaft 43 is rotated in the opposite direction to withdraw the shut-off valve element 44 from the valve opening 41 and return it to the state of FIG.

Since the closing mechanism 40 is arranged on the inlet side of the strainer 48, it has the advantage that the fluid outflow amount is small when the flow path 2 is closed and the strainer plug 47 is removed. If it does not have a strainer, it will be installed anywhere.

[0029]

Embodiment 2 FIG. 4 which shows an actual施例forced opening mechanism in <br/> invention recited in claim 2 among the first invention, adjusting the spring load adjustment spring (not shown) The adjusting screw has no insertion hole through which the push rod for holding the valve opening position is inserted, and the guide rod 53 inserted into the lower lid body 51 of the valve body 1 is used to open the valve. .

That is, the forced valve opening mechanism 50 is provided in the lower lid body 5.
1. A male screw portion 54 provided at the tip of the guide rod 53 of the valve body 10 that is tightly inserted in the guide hole 52 formed through the first body 1, and a male screw 5 that is screwed into the mounting screw hole 55 provided in the lower lid body 51.
6 and a plug body 58 having a recess 57 into which the male screw portion 54 is loosely fitted, and a screw hole 5 for screw-fitting into the male screw portion 54.
9 and a nut body 60 that is loosely fitted into the mounting screw hole 55 and is integrally formed in the opposite direction.

When the pressure reducing valve of this embodiment having such a forced valve opening mechanism 50 is incorporated into the pipe at the time of construction of the pipe for initial water passage, the screw hole 59 of the valve opening jig 61 is screwed into the male screw portion 54.
When it is screwed in and turned, the valve body 10 is pulled and the valve opening spring 17
Is compressed and separated from the valve seat 3. A stopper 62 is provided on the valve body 10.
The valve body 1 is provided until it comes into contact with the lower lid body 51.
0 can be pulled, and the tip end surface of the nut body 60 contacts the inner surface of the mounting screw hole 55 to hold the valve body 10 at the maximum opening position (A in FIG. 4).

When the internal cleaning is finished, the nut body 60 is removed from the male screw portion 54, the direction of the valve opening jig 61 is changed, and the plug body 58 is screwed into the mounting screw hole 55 to close the guide hole 52 and close the fluid. It works as an original pressure reducing valve in the state where the leak of (1) is eliminated (B in FIG. 4).

Even in this embodiment, as in the first embodiment, by adopting a structure in which the secondary side fluid pressure detecting diaphragm and the valve body 10 are not directly connected to each other, even if the initial water flow is high pressure, the diaphragm is Since it moves without being restricted by the valve body 10, there is no fear of damage. The pressure reducing valve of this embodiment also has the same closing mechanism and strainer as in the first embodiment.

[0034]

[Third Embodiment] Here, a forced valve opening mechanism is shown in FIG.
Any thing can be used. This forced valve opening mechanism pulls the valve element to open the valve, as in the second embodiment.

That is, in this forced valve opening mechanism 64, the lid cover 66 is attached to the lower lid 65 of the valve body 1 by screw fitting, and the guide rod 67 of the valve body 10 is penetrated therethrough to guide the valve. The lever 68 is detachably attached to the protruding end of the rod 67 from the lid cover 66, and the valve opening spring 17 includes a lid cover 66 and a spring receiver 69 attached to the guide rod 67 inside the lid cover 66. Has been charged between.

When the pressure reducing valve of this embodiment having such a forced valve opening mechanism 64 is installed in the pipe at the time of construction of the pipe for initial water passage, the lever 68 is covered with the body cover 66.
The valve closing spring 17 is compressed by pushing it against the lower surface of the valve to lower the guide rod 67 to separate the valve body 10 from the valve seat 3 and maintain the valve open state while holding the lever 68, or 68 is a guide rod 67 that does not generate a rotation moment
Then, the valve body 10 is left at the same axis as the above and the valve body 10 is held at the maximum opening position (A in FIG. 5).

When the internal cleaning is finished, the lever 68 is rotated in the opposite direction to be separated from the lid cover 66 to be in a free state, so that it functions as an original pressure reducing valve (B in FIG. 5).

The pressure reducing valve of the present embodiment is also constructed such that the diaphragm for detecting the secondary fluid pressure and the valve body 10 are not directly connected to each other as in the first embodiment, and the closing mechanism and strainer similar to those of the first embodiment are used. It is equipped with

As in the second and third embodiments, the lower lid body 51,
Forcibly opening the valve body 10 from the side of 65 has the advantage that the mechanism can be made compact and simple.

FIGS. 6 and 7 show an embodiment of the invention described in claims 3 and 5 of the second invention described in claims 3 , 4 and 5, and are provided in the flow passage 2 of the valve body 1. Valve body 1 which cooperates with the valve seat 3 to connect or disconnect the primary passage 6 and the secondary passage 8 in series.
0 and the valve stem 11, the piston 13 integrated with the diaphragm 19 for integral detection of the secondary side fluid pressure and the diaphragm stem 21 integrated with each other so that they can move separately. In the first embodiment, the spring force of the adjusting spring 28 inside is adjusted by the adjusting screw 23 and the upper spring receiver 26, and the strainer 48 attached to the strainer plug 47 is inserted in the primary passage 6. Is the same. In this embodiment, the valve closing spring 17 is inserted into the guide hole 16 of the lower lid body 15 into which the guide rod 14 of the valve body 10 is inserted.

The side channel 71 according to the present invention is a strainer 48.
Of the upstream side of the primary passage 6 is communicated with the secondary chamber 7 is provided. Further, the flow path diverter structure 72 side channels valve formed to face on the same axis as the flow path valve port 73 formed in the inlet of the strainer 48 of the primary passage 6 and which in the inlet side passage 71 Mouth 74 and guide plug 75 screwed to the valve body 1
The three-position directional control valve has a direct-acting spool valve structure including a valve shaft 77 threaded through the screw hole 76 and a plunger valve body 78 provided at the tip thereof.

Such a side channel 71 and a channel switching mechanism 72
The guide plug 75 of the valve shaft 77 is installed when the pressure reducing valve of this embodiment including
The valve shaft 77 is moved forward while the tool is engaged with the projecting end of the primary shaft 6 by rotating the valve shaft 78, and the valve body 78 is almost completely fitted into the flow path valve port 73 to close the inlet of the strainer 48.
Are communicated with the secondary chamber 7 by the side flow passage 71 without passing through the valve seat 3 (A in FIG. 7). At this time, even if the initial water flow is high, the diaphragm 19 moves separately from the valve body 10, and the valve body 10 is in contact with the valve seat 3 only by the spring force of the valve closing spring 17, so that biting occurs. Not only does it prevent solid foreign matter from adhering to the contact surface.

When the internal cleaning is completed, the valve shaft 77 is rotated in the opposite direction to retreat, and the valve body 78 is almost completely fitted into the side flow passage valve port 74 to close the side flow passage 71. Acts as an original pressure reducing valve flowing from the strainer 48 to the primary chamber 5, the valve seat opening 4, and the secondary chamber 7 (B in FIG. 7).

When the strainer 48 is to be cleaned or replaced, and the pressure reducing valve itself or other equipment is to be maintained and inspected, the valve body 78 is slightly advanced to fit into both the two valve openings 73 and 74 to close them. This stops the fluid flow (C in FIG. 7).

According to this embodiment, since the switching valve having the spool valve structure is fixed to the predetermined position with the screw, there is an advantage that the switching and the flow passage are surely performed.

[0046]

[Embodiment 5] FIG. 8 is described in claims 3 and 5 of the second invention .
The present invention shows a different embodiment of the flow path switching mechanism, and the flow path switching mechanism 80 is the same as in the fourth embodiment, and the flow path valve seat 81 formed at the inlet of the strainer 48 of the primary passage 6 and the flow path valve seat 81. A side flow passage valve seat 82 formed at the inlet of the side flow passage 71 facing each other on the same axis and a valve shaft 85 threaded through a screw hole 84 of a guide cap 83 screwed and fixed to the valve body 1 are provided. Two disc-shaped valve bodies 86, each of which has a valve body portion projecting into the primary passage 6 of the valve shaft 85, is fitted and supported axially movably between the stepped portion 85a of the tip portion and the stopper 85b. , 87 and a pressing spring 88 made up of a compression coil spring fitted between them.

The pressure reducing valve of this embodiment having such a side flow passage 71 and a flow passage switching mechanism 80 consisting of a three-position directional switching valve having a floating valve structure is incorporated in the pipe at the time of construction of the pipe for initial water passage. When performing, the valve body 85 is advanced while pinching the protruding end of the valve shaft 85 from the guide cap 83 with a fingertip, and the valve body 86 on the front end side is pressed against the flow path valve seat 81 and the valve body on the base end side is pressed. By bringing 87 closer to the valve body 86 while compressing the pressing spring 88 at the stepped portion 85a, the inlet of the strainer 48 is closed and the side flow passage 71 is opened to open the primary passage 6
And the secondary chamber 7 are communicated with each other by the side channel 71 (A in FIG. 8).

When the internal cleaning is completed, the valve shaft 85 is rotated in the opposite direction to retreat, the valve body 86 on the tip side is pushed by the stopper 85b to be separated from the flow path valve seat 81, and the valve body 87 on the base side is moved. The original pressure reducing valve that closes the side flow passage 71 by pressing it against the side flow passage valve seat 82 by the compression of the pressing spring 88, and causes the fluid to flow from the strainer 48 to the secondary chamber 7 through the primary chamber and the valve seat opening. Work as (B in Fig. 8).

When the strainer 48 is cleaned or replaced, and the pressure reducing valve itself or other equipment is maintained and inspected, the valve shaft 85 is moved slightly forward so that the stopper 85a and the stepped portion 85b are respectively connected to the passage valve seat 81 and the side passage. By locating the valve element inside the valve seat 82, the valve elements 86 and 87 are pressed against them by the spring force of the pressing spring 88 to close them, and the flow of fluid is stopped (C in FIG. 8).

According to this embodiment, since the switching valve having the floating valve structure is fixed to the predetermined position with the screw, the switching and the flow passage formation are surely performed, and the valve bodies 86 and 87 in the opposite directions are pushed. Since the spring 88 presses the two opposing valve seats 81 and 82 against each other, there is an advantage that the flow passage is reliably closed.

[0051]

Sixth Embodiment FIG. 9 which shows an actual施例flow path switching mechanism in <br/> invention recited in claim 4 of the second invention, upstream of the strainer (not shown) of the primary passage 6 A side flow passage 90 that connects the primary passage 6 to the secondary chamber 7 is provided on the side, and the flow passage switching mechanism 91 installed at the branching portion is formed of a three-position directional switching valve having a ball valve structure.

Such a side channel 90 and a channel switching mechanism 91
When the pressure reducing valve of the present embodiment having the above is incorporated into the pipe at the time of installing the pipe for initial water passage, the valve body 92 is manually rotated to close the strainer inlet side and the valve passage 93 thereof.
Thus, the primary passage 6 and the side flow passage 90 are communicated with each other. Also,
When the internal cleaning is completed, the side flow passage 90 is closed at the position shown in the figure, and the fluid acts as an original pressure reducing valve that flows from the strainer to the secondary chamber 7 through the primary chamber 5 and the valve seat opening. Further, when cleaning or replacing the strainer, or performing maintenance and inspection of the pressure reducing valve itself or other equipment, the switching valve inlet of the primary passage 6 is closed to stop the fluid flow.

According to this embodiment, the flow path switching mechanism 91 has a manual ball valve structure, and the flow path can be opened and closed and switched simply by rotating it, and the construction and operation are extremely simple.

The original structure of the pressure reducing valve including the side flow passages 71 and 90 and the flow passage switching mechanisms 80 and 91 of the fifth and sixth embodiments is the same as that shown in the fourth embodiment.

[0055]

EXAMPLE 7 10 and 11 claim 6 there is shown an embodiment of the third invention described in the flow path 2 of the valve body 1
The piston 13 integrated via the valve body 10 and the valve body stem 11 which cooperate with the valve seat 3 provided in the valve to connect or disconnect the primary passage 6 and the secondary passage 8 is a diaphragm for detecting the secondary side fluid pressure. 19 and a diaphragm stem 21 which is integral with each other, and is adapted to move separately from each other.
The spring force of the adjusting spring 28 inside is adjusted by the adjusting screw 23 and the upper spring receiver 26. The strainer 48 attached to the strainer plug 47 is fitted in the primary passage 6, and the inlet side of the strainer 48 is manually operated. The fact that the closing mechanism 40 is arranged is the same as in the first embodiment. In addition, FIG.
11 which are the same as those in FIGS. 1 and 2 are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

The side passage 94 according to the present invention is provided on the upstream side of the closing mechanism 40 so that the primary passage 6 communicates with the secondary chamber 7. Further, the manual closing mechanism 95 is formed at the side flow passage valve port 96 formed at the inlet of the side flow passage 95, the valve shaft 97 which is screwed through the valve body 1 so as to face the valve port 96, and the tip thereof. This is a configuration including a side flow passage valve body 98 that closes the side flow passage valve port 96. Further, a cylindrical strainer 99 is installed between the side flow passage valve port 96 and the side flow passage valve body 98 with the closing mechanism 95 fully opened, and the strainer 99 has the side flow passage valve body 98. It is detachably attached to.

When the pressure reducing valve of this embodiment having the strainers 48, 99, the closing mechanisms 40, 95, and the side flow passages 94 is installed in the pipes at the time of construction of the pipes for initial water passage, the primary passages 6 are The screw rod 43 of the closing mechanism 40 is turned to fit the closing valve body 44 into the valve opening 41 to close the primary passage 6, and the water for internal cleaning is supplied from the side passage valve opening 96 to the strainer 9
Flows through the side channel 94 to the secondary chamber 7 through 9.

When the internal cleaning is completed, the valve shaft 97 of the closing mechanism 95 of the side flow path 94 is rotated to remove it together with the strainer 99 from the valve body 1, the strainer 99 is removed, and the valve body 1 is again removed.
The side flow path valve body 98 is screwed onto the side flow path valve port 96 to close the side flow path valve 94, and the side flow path 94 is closed.
The fluid flows from the strainer 48 to the primary chamber 5, the valve seat 4, and the secondary chamber 7 by rotating 3 in the opposite direction to separate the closing valve element 44 from the valve opening 41 and open the primary passage 6. It works as an original pressure reducing valve.

When the strainer 48 is to be cleaned or replaced, and the pressure reducing valve itself or other equipment is to be maintained and inspected, the screw rod 43 is screwed in to close the primary passage 6 and stop the fluid flow.

According to this embodiment, the side flow passage 9 is unnecessary after the initial water flow for cleaning the interior at the completion of construction.
4 is closed by a dedicated closing mechanism 95, and a dedicated closing mechanism 40 for temporarily closing the primary passage 6 for cleaning, replacement or maintenance / inspection of the parts is additionally provided, so that the flow passage can be opened and closed without the risk of erroneous operation. There is an advantage that can be switched. Further, by providing the strainer 99 in the side flow path 94, solid foreign matter carried from the upstream is removed, and there is no fear of sticking to the valve seat 3 or the valve body 10. Further, as shown in the drawing, the strainer 99 and the valve When the shaft 97 and the valve 97 are arranged vertically and the hollow portion 97a is provided in the upward valve shaft 97, there is no fear that solid foreign matter will drop into the hollow portion 97a and clog the strainer 99.

In each of the above embodiments, the pressure reducing valve is provided with the forced opening mechanisms 31, 50, 64, the closing mechanisms 40, 95, and the flow path switching mechanisms 72, 80, 91. The same purpose can be achieved by providing the flow valve and the constant flow valve. Further, in each of the above-described embodiments, the strainer 48 is provided in the primary passage 6, but the closing mechanism 40 can be installed even in a device without the strainer 48 to achieve the purpose.

[0062]

As is clear from the above description, the valve body is fixed at the valve open position by the manual forced valve opening mechanism, or the side flow passage that bypasses the valve seat is opened so that the pipe construction is completed. It is possible to perform the initial water flow for internal cleaning of the valve without trapping solid foreign matter on the valve seat, etc. Therefore, a substitute pipe is not required, which simplifies the piping work, saves the construction cost, and shortens the construction period. is there.

Further, by closing both the regular flow passage and the side flow passage by the flow passage switching mechanism or the closing mechanism, it becomes possible to clean the equipment in the pipe, replace the parts, and perform maintenance and inspection. It is possible to simplify the piping structure and reduce the equipment cost by eliminating the need for a water stopper for stopping, and it is particularly advantageous for a piping system where multiple units such as water supply for each house and hot water supply in an apartment house are installed. . Furthermore, forced valve opening mechanism, flow path switching
The mechanism and closing mechanism secure the flow path mainly by linear movement,
Since it is supposed to switch and close, a large amount of force is required.
Perform the required operation with extremely simple operation without need
In addition, the entire fluid control valve can be
For regular fluid control functions without shaping or complicating
It can be installed without affecting.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the first invention.

2 is a cross-sectional view of FIG.

FIG. 3 is a vertical cross-sectional view of the embodiment of FIG. 1 at the time of forced valve opening.

FIG. 4 is a vertical sectional partial view showing a different embodiment of the first invention, in which A is forcibly opened and B is for normal use.

FIG. 5 is a vertical sectional partial view showing a further different embodiment of the first invention, in which A is forcibly opened and B is for normal use.

FIG. 6 is a vertical sectional view of an embodiment of the second invention.

7 is a partial cross-sectional view for explaining the operation of the flow path switching mechanism of the embodiment of FIG.

FIG. 8 is a partial cross-sectional view for explaining the operation of a different embodiment of the flow path switching mechanism in the second invention.

FIG. 9 is a partial vertical cross-sectional view of a further different embodiment of the flow path switching mechanism in the second invention.

FIG. 10 is a vertical sectional view of an embodiment of the third invention.

11 is a partial cross-sectional view of FIG.

FIG. 12 is a layout diagram of an example of conventional piping.

[Explanation of symbols]

1 valve body, 2 flow paths, 3 valve seats, 6 primary passages, 8 secondary passages, 10 valve bodies, 19 diaphragms, 31, 50, 64 forced valve opening mechanism, 40, 95
Closing mechanism, 48,99 strainer, 71,9
0,94 side flow path, 72,80,91 flow path switching mechanism,

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Akihiro Kitagawa, 2-13 Tamagawa, Ota-ku, Tokyo Ben Co., Ltd. (72) Inventor, Fumitaka Kato 13-1 Stock, Iwaki, Iwaki, Fukushima Prefecture Ben Co., Ltd. In Iwaki Technology Center (72) Inventor Minoru Sasaki 13-1 Stock Company, Yoshima Industrial Park, Iwaki City, Fukushima Prefecture Ben Iwaki Technology Center (72) Inventor Takashi Kitada 13-1 Stock Company, Iwaki City, Fukushima Prefecture Ben Corporation In the Iwaki Technical Center (56) Reference Japanese Unexamined Patent Publication No. 1-266370 (JP, A) Actually open 61-89910 (JP, U) Actually open 5-47648 (JP, U) Actually open 3-55970 (JP , U) Actually open 63-35112 (JP, U) Actually open 54-108430 (JP, U) Actually open 5-47647 (JP, U) Actually open 62-126679 (JP, U) Actually open 5-20108 JP, U) Tokuoyake flat 4-26721 (JP, B2) real public flat 4-18011 (JP, Y2) real public Akira 46-5754 (JP, Y1) (58 ) investigated the field (Int.Cl. ^7, DB name) F16K 31/00 F16K 35/00 F16K 51/00 G05D 16/06

Claims (7)

(57) [Claims] 1. A valve seat provided in a flow path from a fluid inlet to an outlet, and a valve element that operates according to a difference between a secondary fluid pressure applied to a diaphragm and an adjusting spring load that opposes the secondary fluid pressure. In the fluid control valve in which the valve seat and the valve body cooperate to control the pressure and flow rate of the fluid, the adjusting spring is vertically movable by an adjusting screw whose upper end is protruded upward in the spring case. The adjusting screw has an insertion hole formed between the upper spring bearing and the diaphragm, the insertion hole penetrating the adjustment screw, and the push rod inserted into the insertion hole. A manual forcible valve opening mechanism comprising a valve opening jig that is screw-fitted to the above-mentioned. Pushes the diaphragm and valve through the hole and keeps the maximum opening position There is a shall, fluid control valves, characterized in that. 2. A valve seat, which is provided in a flow path from a fluid inlet to an outlet, and a valve body which operates according to a difference between a secondary side fluid pressure and a load against the secondary side fluid pressure. In a fluid control valve that cooperates with a valve body to control the pressure and flow rate of a fluid, the fluid control valve is provided at the tip of a guide rod of the valve body that penetrates the secondary chamber and is inserted into a guide hole of the valve body. A manual forced valve opening mechanism comprising a male screw portion exposed to the outside of the valve body and a valve opening jig having a screw hole that is screw-fitted to the male screw portion is provided. A fluid control valve, wherein the guide rod and the valve body are pulled and held at a maximum opening position by being screw-fitted to a male screw portion. 3. A fluid passage provided from an inlet to an outlet of the fluid
The difference between the valve seat and the secondary side fluid pressure and the opposing load
And a valve body that operates in response to the valve seat and the valve body
In a fluid control valve that controls the pressure and flow rate of a fluid, the primary side and the secondary side of the flow passage do not pass through the valve seat.
Connect the side flow passage and the primary side to the valve seat and the side flow passage.
Manual flow path disconnection to communicate with the secondary side via the gap
The flow passage switching mechanism is screwed to the valve body.
And a valve element installed at the tip of the valve shaft
The primary side and the secondary side and the valve seat diameter.
A position to communicate with the ground is communicated with the side flow path.
A fluid control valve , wherein the valve bodies are alternately placed in a position and a position . 4. A fluid passage provided from an inlet to an outlet of the fluid.
The difference between the valve seat and the secondary side fluid pressure and the opposing load
And a valve body that operates in response to the valve seat and the valve body
In a fluid control valve that controls the pressure and flow rate of a fluid, the primary side and the secondary side of the flow passage do not pass through the valve seat.
Connect the side flow passage and the primary side to the valve seat and the side flow passage.
Manual flow path disconnection to communicate with the secondary side via the gap
And a flow path switching mechanism, wherein the flow path switching mechanism is
It has a valve body that is installed at a branch point from the primary side and rotates.
The primary side communicates with the secondary side via the valve seat.
The position to be communicated with the position to be communicated via the side channel
A fluid control valve, characterized in that the valve bodies are arranged alternately . 5. The flow path switching mechanism is a three-position directional switching valve.
Communication between the primary side and the secondary side via the valve seat
And the position where it communicates via the side channel.
The valve body is placed in a position where both of these two paths are closed.
5. Any one of claims 3 and 4 which is supposed to be placed.
Fluid control valve. 6. A fluid passage provided from an inlet to an outlet of the fluid
The difference between the valve seat and the secondary side fluid pressure and the opposing load
And a valve body that operates in response to the valve seat and the valve body
In a fluid control valve that controls the pressure and flow rate of a fluid, the primary side and the secondary side of the flow passage do not pass through the valve seat.
The side flow path to be connected, and the primary side is a branch point of the side flow path
Manual closing mechanism and the side flow that close downstream than
With a manual closing mechanism for closing the road,
The mechanism includes a valve shaft that is screwed on the valve body and that reciprocates linearly.
And a valve element provided at the tip of the
And the valve body to close the side flow passage and the side flow passage separately.
A fluid control valve, wherein the fluid control valves are designed to operate independently of each other . 7. A manual closing mechanism for closing the side flow passage.
The valve body is detachably attached to the front
When the strainer is installed, the valve body opens the side flow passage.
Fluid through the strainer and from the side channel to the two
Pour the valve to the next side and remove the strainer.
The fluid control according to claim 6, wherein the recording side flow passage can be closed.
valve.