JPH0860712A - Branch pipe header - Google Patents

Abstract

PURPOSE: To provide a branch pipe header having a fixed flow rate valve which can flow a proper use amount into a branch port and a flow-out side via a pressure reducing valve section mounted on a header main body, a check valve which can guarantee the proper operation of the branch pipe header, and a bypass passage which can flush in the pressure reducing valve section. CONSTITUTION: A valve box 6 of a pressure reducing valve section 5 is provided on a header main body 1 in such a manner that it can turn freely. Both passages between a flow-in port 9 and an outlet 3 of the pressure reducing valve section of the header main body 1 can be opened and closed due to a turning position of the valve box 6. A bypass passage 12 which can be provided with a bypass strainer 13 orthogonal to open passages is provided in the valve box 6. Both passages between the flow-in port 9 and the outlet 3 of the pressure reducing valve section are constituted in such a manner that they can communicate with a pressure reducing valve, a bypass or be shut off. A fixed flow rate dual check valve 41 which regulates fully-open lift of the dual check valve is provided inside a branch port 40. Both of the pressure reducing valve and fixed flow rate dual check valve 41 are assembly units and can be mounted and dismounted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a faucet in a dwelling unit in a building, a heating / cooling appliance, and a pressure reducing valve portion rotatably mounted on a header body when water or hot water is supplied to a snow melting machine or the like. A branch pipe to which the sheath pipe header method is applied, which can always supply a predetermined constant flow rate at the end (water faucet) of the branch pipe by a constant flow check valve or a constant flow valve housed in the branch port connected to the header body. It's about headers.

[0002]

2. Description of the Related Art Conventionally, the water supply and hot water supply to a dwelling unit in an apartment house, etc. are made by branching from a single pipe for each faucet. The sheath pipe header construction method is as shown in FIG. It is a method of piping one by one into the faucet of the terminal. Further, as shown in FIG. 22, there is a water supply hot water supply pipe in the sheath pipe, which is protected and guided by the sheath pipe. The header construction method for octopus piping is pipe (water supply /
A large amount of hot water supply pipe material is used, and metal pipes such as soft copper pipes are not price competitive. For this reason, as the water / hot water supply pipe, a flexible and long resin pipe such as a polybutene pipe or a cross-linked polyethylene pipe is used by inserting it into the sheath pipe. Of course, the sheath tube is made of resin and is a polypropylene bellows-shaped corrugated tube.

The header shown in FIG. 25 is an enlarged structural view of the header in FIG. 21, and the number of branch ports (outflow side) is arbitrary, but since it is five, it strictly corresponds to a water supply header. is there.

In the sheath pipe header construction method, since the joints are connected only to the header side and the terminal faucet, the durability against corrosion is improved, there is no fear of leakage, and there is no rust, so clogging due to rust bumps also occurs. And because it is protected by a sheath, there is no danger of damage due to external force. However, in order to reduce the durability of the water hammer to the impact pressure and to reduce the pressure drop due to the expansion of the pipe diameter in the water pressure test (water tension test), it is necessary to make the resin pipe thick. The flexibility (flexibility) of the resin pipe is one of the characteristics of this pipe material and this construction method, but the pipe material is hard and the bending radius is too large. It is desirable to reduce the water pressure in the header to a necessary minimum by using a pressure reducing valve, reduce the wall thickness of the pipe material as much as possible, and make more effective use of the original flexibility of the resin pipe. Conversely, since it is made of a resin tube, it is necessary to adjust the working water pressure so as not to exceed about ² kgf / cm ² .

There are an increasing number of cases where door-to-door water supply pressure reducing valves as shown in FIGS. 23 and 24 are mounted immediately before the water meter of FIG. The water supply (hot water) pressure in the dwelling unit is 1.5 kgf / cm ²
Alternatively, the pressure is kept constant at a required minimum water pressure such as ² kgf / cm ² . The above-mentioned pressure reducing valve was installed in a conventional conventional pipe branching from a single pipe before the sheath pipe header method to each faucet, but its existence was reviewed in the sheath pipe header method using a resin pipe. There is a background,
It is originally intended to help prevent running water noise.

The water supply noise is transmitted from the piping to the structure of the building as a sound wave into the air in the other room, rather than the sound directly emitted from the vicinity of the water tap into the air or the sound caused by the water splash phenomenon. The solid sound component becomes a problem.

Initially, it was found that when the water supply pressure was set to about 2 kgf / cm ² or less, the above-mentioned noise was drastically reduced. Therefore, in order to reduce the water supply pressure of each house to about ² kgf / cm ² or less, a decompression dedicated to individual water supply for each house I came to use the valve. However, it was often found that the pressure reducing valve itself became a new noise source, and there was an urgent need to develop a low noise type pressure reducing valve. At present, various low noise type pressure reducing valves are commercially available, but generally, low noise often refers to noise of about 50 dB (A) or less (microphone distance 15 cm).

Another advantage of installing a pressure reducing valve is suppression of water hammer. Today, with the rapid spread of single levers and automatic washing machines, which are the source of generation, it is an urgent task. In particular, a header construction method that uses a resin pipe that has a lower pressure resistance than metal for the header body and branch pipe (octopus pipe) Then, it is an indispensable subject. For example, even if it is assumed that the hammer pressure (impact pressure) is three times as large as the water pressure, it is 1 when the water pressure is 3.5 kgf / cm ^2.
There is a possibility that the pressure will rise to 0.5 kgf / cm ² , and if a pressure reducing valve is added to this, 4.5 kgf / cm ² (pressure reducing valve setting pressure 1.5 kgf / cm ² ) to 6 kgf / cm ² (pressure reducing valve setting pressure 2 kgf / Cm ² ) and greatly decreases.

Since a flush is carried out during the water flow test, as in the case of the water meter, the decompression valve for individual water supply is made into a union joint system so that the flush short pipe can be attached and detached. Since it is necessary to make it removable, the work of attaching and detaching the pressure reducing valve and the flush short pipe to each other is extremely complicated, which has been a major obstacle to the use of the pressure reducing valve.

As shown in FIG. 24, a pressure reducing valve strainer for ensuring the pressure reducing operation is required in addition to the flash.
In addition, the structure is complicated because it needs to be detachable from the outside, and the size is inevitably increased in combination with the joint structure.

The pressure reducing valve is a valve that always keeps the pressure on the outlet side of the pressure reducing valve constant even if the load (flow rate) changes or the inflow pressure fluctuates. "Operation of Example" column

Or

It will be described later. Therefore, the conventional pressure reducing valve shown in FIGS. 23 and 24 is the embodiment according to the present invention (FIGS. 1, 6, and 8).
The same reference numerals are omitted for the same members, and "'" is indicated for the corresponding members.
, And new members are given new reference numerals to clarify the difference in configuration.

When installing the check valve, it is usually preferable to install it immediately after the water meter (outlet side) in FIG. 21, and as shown in FIG. 27, the check valve is a single type and also the sheath pipe header construction method. Although it was carried out from a general conventional piping system that branches from a single pipe to each faucet, installation at this position is unaffected by the construction method, and backflow (water pollution) in the dwelling unit cannot be prevented, Further, since it is a single-type check valve, backflow (water pollution) to other dwelling units cannot be imitated immediately if dust is bitten between the valve seat and the valve body, resulting in poor stopping.

The action of the conventional check valve shown in FIG. 27 is that although the fluid backflows for some reason and flows into the inside from the opening of the guide cylinder 86, the check valve body 88 contacts the valve seat 89. The contact and stop prevent the reverse flow of the fluid, and prevent the reverse flow to the water meter on the side of the union flange 91.

One of the advantages of the header construction method is that the pressure balance in the pipe is maintained even if two faucets are used at the same time, and the decrease in the amount of water is small, but the unnecessary large discharge of water is also required for other uses. It is a regret that it adversely affects water conservation measures, and the header construction method also requires flow restriction.

Recently, faucets with a limited flow rate are commercially available, but since the magnitude of the flow rate depends on the water pressure, the flow rate cannot be stabilized unless the pressure is stable. Therefore, as shown in FIG. 26, at the branch port (outflow side) 40 ″, there is a header having a so-called constant flow valve that always flows a constant amount of water even if the pressure fluctuates. The valve body 82 that responds to the flow rate adjusts the clearance (so-called passage area) with the valve seat 83 to allow a constant flow rate. However, since the gap between the valve element 82 and the valve seat 83 is small, dust is likely to be clogged and flashing is not possible.

[0016]

As described above, particularly in the sheath pipe header construction method, the water supply pressure (pressure in the header)
Is required to be adjusted to a required minimum value of 1.5 kgf / cm ² or 2 kgf / cm ² , and it is essential that the pressure reducing valve has excellent performance and a low noise type. In spite of the fact that it is preferable to do it immediately before, the conventional method is shown in FIG.
The conventional water supply pressure reducing valve as shown in Nos. 3 and 24 is installed, a short flush tube is required, and a flushing operation that requires mutual attachment and detachment with the pressure reducing valve is inconvenient and has many drawbacks.

Further, the check valve is to prevent backflow (water pollution) in the dwelling unit, which is a drawback of the conventional example. This is the basis of backflow prevention, and the check valve is certain to prevent backflow. It is necessary to consider to increase

Finally, the constant flow rate (limit flow rate) valve is shown in FIG.
In the conventional example as shown in FIG. 3, there is a drawback that the noise is large and the flash cannot be performed as described above, and since the movable valve body 82, the spring 84 and the like are additionally provided, the structure is complicated. is there.

[0019]

[Object] The present invention has been proposed by paying attention to the above-mentioned drawbacks, and an object of the present invention is to provide a fluid flowing out from the outlet of the pressure reducing valve portion through the pressure reducing valve portion of the header body.
At the branch pipe terminal (water faucet) assembled to the branch port on the outflow side, the maximum flow rate can be flown out under a predetermined usage amount, while backflow is prevented, and further, by providing the flow path switching function of the pressure reducing valve section,
It is intended to provide a branch pipe header which is easy to handle, easy to maintain, and multifunctional.

[0020]

[Means for Solving the Problems] To achieve the above object,
In the branch pipe header according to the present invention, a valve box is rotatably fitted between an inlet of the header body and an outlet of the pressure reducing valve section, and the inlet and the outlet of the pressure reducing valve section are rotatably attached according to a rotating position of the valve box. It is possible to open and close both passages at the same time, and to equip the valve box with a bypass passage that connects these two passages to each other.
The second feature is that the bypass strainer can be attached to and detached from the outside of the header main body in the bypass passage, and the pressure reducing valve portion includes a valve box, an adjusting spring, a diaphragm, and a spring protection cylinder that are detachable from each other. The third characteristic is that the pressure reducing valve assembly unit is formed, and the fourth characteristic is that a constant flow double check valve or a constant flow reducing pressure orifice body is housed in the outlet side branch port of the header body. The same as the above, a fifth feature is that a ball valve whose holding position can be selected is installed at the branch port. Further, a fixed flow double check valve or a constant flow decompression orifice body is detachably attached to the branch port. The sixth feature is that the product is stored as.

[0021]

According to the present invention, when the valve box is pivotally set to the desired position with respect to the header body, for example, the bypass passage formed in the valve box is set to a position where both the inflow port and the pressure reducing valve section outlet are opened. , The fluid from the inflow port can directly flow out to the outlet of the pressure reducing valve through the bypass passage, and
When the bypass passage is made orthogonal to the longitudinal direction of the header body, the fluid from the inflow port flows into the valve box and reaches the pressure reducing valve section outlet under reduced pressure, and further, the valve box is moved in the longitudinal direction of the header body. Set diagonally (45 °) to the inlet,
When the outlet of the pressure reducing valve is closed, the fluid from the inlet does not flow out to the outlet of the pressure reducing valve. However, in this state, the so-called pressure reducing valve portion itself fulfills the water stopping function.

Since the bypass strainer is detachably attached to the bypass passage from the outside of the header body, dust, gravel, and other contaminants can be captured and removed during flash work, and the valve box can be rotated after the work is completed to reduce the pressure. It is possible to remove the bypass strainer from the header body for inspection, cleaning, etc. underneath, and since the branch port contains a constant flow double check valve or constant flow pressure reducing orifice body, always connect to the branch port. The maximum flow rate of the branch pipe terminal (water faucet) can be controlled to a predetermined amount of use, and there is no unnecessary excessive water discharge, so there is a water saving effect, and there is no fear of causing a sudden pressure drop in the branch pipe header.

Since the holding position of the ball valve can be selected for each usage amount of the branch pipe terminal, a required flow rate can be selected in advance,
It is convenient for the user.

In the case of a branch pipe header not equipped with a bypass strainer, the assembly unit of the constant flow double check valve or the constant flow pressure reducing orifice body can be stored in the header body, so it should be lost or damaged. Instead, it can be packed and transported to a desired place and can be flushed immediately after mounting the header by simply taking out the assembly unit, which is convenient for the installer to handle and work.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring to FIGS. 1 to 6 of the first embodiment, the inlet 2 of the header body 1, the pressure reducing valve outlet 3 and the attachment / detachment port 37 of the bypass strainer 13 will be described. The backing guide tube 4 is fitted and fixed to the inner peripheral edge, and the packing 15 and the "O" ring 36 are fitted into the wall body of the header body 1 at the outer peripheral edge thereof.
At the lower end of the valve box 6 provided on both sides with communication passages 8 and 10 each having a substantially rectangular vertical cross-section, which are tightly fitted to the inner peripheral edges of the “O” rings 36, respectively, and provided with a bypass passage 12 to be described later, An engraved female screw 18 _a is detachably screwed onto the inner peripheral edge of the upper end of the spring protection cylinder 18 in the pressure reducing valve assembly unit 7.
As shown in FIG. 1, it is integrally connected to the valve box 6. The lever box 6 and the pressure reducing valve assembly unit 7 are collectively referred to as a pressure reducing valve section 5.

The valve box 6 is formed in the center of the wall w formed above the valve box 6.
Is the projected rotating gripping portion 6 _b, fitted a tool such as a wrench to the grip portion 6 _b for the pivoting (not shown), the corresponding valve body 6 required to be rotatable, and gripping the rotation part 6 inside the forming bypass passage 12 immediately below the _b, houses the conical bypass strainer 13 as seen in FIG. 5, the valve body 6
Depending on the rotational position of the pressure reducing valve, the inflow port 2 and the pressure reducing valve portion outlet 3 are communicated with each other under reduced pressure via an inflow hole 9 and a pressure reducing valve portion 5 (see FIGS.
In addition, the inflow port 2 and the pressure reducing valve section outlet 3 can be directly connected (see FIG. 3) or blocked (see FIG. 4) via the bypass passage 12.

An inflow hole 9 is formed between the hanging part w ₁ of the wall w of the valve box 6 and the outer wall, and the valve body 26 facing the lateral center of the inflow hole 9 is provided with the pressure reducing valve assembly. It is mounted above the unit 7.

Regarding the structure of the pressure reducing valve assembly unit 7, as shown in FIGS. 1 and 6, a valve seat fitted and fixed below the hanging portion w _{1 of the} wall w via “O” rings 19 and 20. A through hole i is bored in the middle of the partition wall f of 16 and a pressure reducing valve strainer 21 is stretched around the outer peripheral edge of the through hole i, and dust, rubble, etc. in the fluid passing through the inflow port 2 and the inflow hole 9 are provided. A valve element 26 which can prevent the inflow of foreign matters into the valve seat body primary side chamber 34, and which is in contact with and separated from the upper end of the partition f above the valve rod 25 which can move up and down in the valve seat body primary side chamber 34. assembling the presser 27, while fastening the nut 28 to the protruding portion of Ben桿25 penetrating them, "O" rings on the outer periphery of the reduced diameter portion 25 _r below the balance piston 25 _a of Ben桿25 24 Is fitted.

The fastening said diaphragm 29 fixed to the balance piston 25 _a lower end of the flange 18 _h of the upper horizontal portion of the spring protecting cylinder 18 the outer end near the valve seat 16 of the polymerization thereabove with countersunk head screw 17 On the other hand, the diaphragm support 3 is fixed in the center of the diaphragm 29 with a nut 31 and has a flattened U-shaped cross section.
A coil-shaped adjustment spring 32 is stretched between 0 and the bottom of the spring protection cylinder 18 to maintain balance with the fluid pressure in the diaphragm chamber 33. Thus the diaphragm chamber 33 and communicating with the secondary chamber 11, when the fluid pressure of the pressure reducing valve portion outlet 3 and header body lumen 1 _b is reduced in use of the terminal faucet from the branch port 40 to be described later (not shown) , The valve rod 25 is pushed up by the elastic force of the adjusting spring 32, the valve body 26 is separated from the upper end of the partition f, and the fluid is discharged from the inflow hole 9 into the secondary-side chamber 11 on the pressure reducing valve outlet 3 side. After the fluid inflows, the diaphragm chamber 3
The diaphragm 29 is pushed down again by the increase of the pressure in 3, and the valve rod 25 is also lowered at the same time, so that the balance between the elastic force of the adjusting spring 32 and the fluid pressure can be maintained again.

An appropriate number (five in this case) of branch ports 40 are arranged in parallel on the pressure reducing valve section outlet 3 side of the header body 1, and each of these branch ports 40 has a drooping portion. A screw j is engraved on the outer peripheral edge of e, and the knurl 51 is attached to the male screw j.
The union nut 51 dated _a freely screwed detachably, also,
A step portion a is formed above the union flange 50 which is in close contact with the lower end of the hanging portion e via an “O” ring 49, and the step portion a is mounted on the reduced diameter portion 51 _r of the union nut 51 and the branch pipe to the inner periphery of the collar 50 (water supply and hot water supply pipe) external thread of the connecting joint p are engraved the threadable internal thread 50 _a.

A female screw 42 is engraved at the opposite end (the right end in this case) of the inflow port 2 of the header body 1, and this is a connection port to the water heater in the piping example of FIG. It also serves as a connection port for adding a branch port, and will be described later in FIG.
It becomes a branch pipe header with 8 branch ports by screwing. When not in use, cover with a plug (male screw type blind stopper).

[0032] In the constant flow rate double check valve 41 in FIG. 11, the first valve seat 43 to the inner peripheral edge 40 _a of the hanging portion e of the header body 1 through the two "O" ring 48, the second valve seat 4
4 is fitted in a superposed state, and a lid 45 is provided below the second valve seat 44.
Are joined to the recesses 43 _a and 44 _b of the first valve seat 43 and the second valve seat 44, respectively, and the second valve seat 44 and the convex portion 4 of the lid 45.
4 _a, the 45 _a and respectively engaged, and the first valve seat 43, the three parties of the second valve seat 44 and the lid 45 are integrally formed, first, second valve seats 43 and 44, the second The two non-return valve bodies 46 are housed inside the valve seat 44 and the lid 45 so that they can be moved up and down,
A coil-shaped spring 47 is stretched in the vertical direction on each of the check valve bodies 46, and the check valve bodies are respectively attached to the lower surfaces of the projecting portions q ₁ and q _{2 of} the first and second valve seats 43 and 44. the cushioning material 46 _a made of a synthetic rubber which is mounted on the respective upper 46 is a contact-stop possible. The setting of the flow rate is determined by the fully open lift 1 of each check valve. The recesses and protrusions for coupling the valve bodies are opposite to the above, that is, the first and second valve seats 43, 4
It is clear that there is no problem even if the respective concave portions of the second valve seat 44 and the lid 45 are engaged with the respective convex portions of 4.

Next, in place of the pressure reducing means by the double check valve of FIG. 11, as shown in FIG. 12, a constant flow pressure reducing orifice in which two orifice bodies each having large and small diameter orifices are integrally connected. The body 52 may be adopted. That is, the large and small orifices 55, 55 'communicating with the inflow port 57.
And a first orifice body 53 having a decompression chamber 56 communicating therewith, and a recess 53 _a of the first orifice body 53.
A convex portion 54 _a formed of the second orifice body 54 engageably inserted, also large, comprises a small-diameter orifice 55, 55 'in the second orifice body 54, an outlet 58 communicating with these provided, flow The fluid flowing from the inlet 57 is the orifice 55, 5
After passing through 5 ', it reaches the decompression chamber 56, and further, through the orifices 55, 55' of the second orifice body 54, a fixed amount of fluid can flow out under reduced pressure and decompression. The setting of the flow rate is determined by the number of orifices, the diameters d and d'and the length S of the orifice. The recesses and protrusions for connecting the orifice bodies to each other are opposite to those described above, that is, the first
It is clear that there is no problem even if the orifice body 53 has a convex portion and the second orifice body 54 has a concave portion. Also, the constant flow vacuum orifice member 52, the inner peripheral edge 40 _a of the hanging portion e of the header body 1 of FIG. 1, the constant flow double check valve 4
It is stored in place of 1, but as is clear from the configuration of FIG.
Contrary to the above, the outlet 58 may be stored upward, that is, the inlet and outlet may be reversed.

Further, as shown in FIG. 10, the ball valve element 63 is accommodated in the branch port 40 'of the header body 1 ",
A format in which a constant flow rate (limit flow rate) can be set may be adopted. That is, while the valve rod 66 and the base plate 70 are mounted on the ball valve body 63 which is rotatably supported by the upper and lower valve seats 64, the convex portion 69 is provided on the header body 1 ″ so that the header body 1 ″ is fully opened (see the left side of FIG. 10). The substrate 70 can be brought into contact with and stopped from the convex portion 69, and the ball screw 63 is held at the 45 ° open position by fixing the stopper 67 with the elongated hole n at a predetermined position by the set screw 68 ( (See the right side of FIG. 10).

In FIG. 13, a screw 71 is engraved on the outer peripheral edge of one end (the left end in this case) of the header body 1 ″ ″, and the male screw 71 has a female thread 42 on the right end of the header body 1 of FIG. In order to correspond to the embodiment of the extension branch pipe that can be detachably screwed, or the hot water supply header of the piping example of FIG. 21, the unillustrated cap (female type blind plug) is screwed to the male screw 71 on the left end. , to the right end of the internal thread 42 shows an embodiment of a hot water supply branch pipe headers the hot water supply pipe was freely threadably removable from the water heater, Thus the fitting hole 40 _a of the branch port 40 11 The constant flow double check valve 41 as shown in Fig. 13 is housed (or the constant flow pressure reducing orifice body 52 in Fig. 12 may be housed). It is not limited to three branch openings 40. And the use branch port 40 is also necessary one thing, eventually view the branch port 40 in the same manner when viewed in 1 requires suitable number.

In FIG. 9, the bypass strainer 13 as shown in FIG. 1 is not attached to the bypass passage 12. Further, in the packed / shipped state, both the inflow port 2 and the pressure reducing valve section outlet 3 are shut off by the valve box 6. In the inner cavity 1b of the header body 1, the constant flow rate double check valve 4 is provided.
1 or a packaging box 7 containing a constant flow pressure reducing orifice body 52
While the required number of 4 are stored, the plug (male screw type blind plug) 73 is temporarily fastened (hand-tightened) to the end (the right end in this case) of the header body 1 so that the branch pipe header according to the present invention can be characterized. It becomes possible to carry out certain packaging and shipping. By carrying out the present invention, the constant flow rate double check valve 41 or the constant flow rate pressure reducing orifice body 52 to be mounted and used after the completion of flushing is not forgotten, and there is no fear of damage. When the assembly unit 41 or 52 is mounted and used, since the packaging box 74 has a flow rate display, a fitting hole is formed in accordance with the flow rate display of the label 72 on the outer surface of the upper reduced portion of the hanging portion e of the branching port 40. housed in the 40 _a.

As means for adjusting the tension of the adjusting spring shown in FIG. 6, as shown in FIG. 8, the center of the spring protection cylinder 18 'is protruded upward from the lower inside of the four rotation preventing surfaces _18r ', and the outer peripheral edge of the spring is protected. is fitted to the 18 _r 'of the protective tube, the spring receiver 59
To accommodate the adjusting screw 35 in a protruding portion of the spring receiver 59, and the spring receiver 59 compresses the adjusting spring 32 'by rotating the adjusting screw 35 to the left (counterclockwise). ,
The pressure in the diaphragm chamber 33 increases, that is, the set pressure increases, while the adjusting screw 35 rotates to the right (clockwise).
Thus, the tension of the adjusting spring 32 'is reduced, that is, the set pressure is reduced. The spring protection cylinder 18 'is provided near the lower end of the adjusting screw 35.
The presence of the "O" ring 60 facing the inside of the bottom of the can prevent fluid from leaking to the outside even if the diaphragm 29 is damaged.

Next, the packing will be described. Inflow port 2, pressure reducing valve outlet 3, and bypass strainer attaching / detaching port 37.
Packing groove 14 is formed on the inner peripheral edge of the fitting hole 1 _a that face the outer peripheral edge of the valve body 6 on the inner periphery of the packing 15 fitted into the packing groove 14 is closely fitted rotatably.
(See FIGS. 1, 2, 3 and 4) However, this packing 15 is made of tetrafluoroethylene resin or the like having good sealing property and suitable hardness and slidability, as shown in FIGS. In addition, it may be formed in a cylindrical shape, or three pieces shown in FIG. 16 may be used. In FIG. 14, cutting the A-A portion is convenient for mounting. Further, in the case of the tetrafluoroethylene resin, since it is flexible, it may be in the shape of a strip or a ribbon. In this case, three pieces shown in FIG. 17 (the strip shape) are used or the one shown in FIG. Use (ribbon). Since it is stamped and formed from a sheet, it can be manufactured at low cost. In FIGS. 14, 15 and 16, the through holes h ₁ , h ₂ ,
The chord c of the packing 15 between h ₃ is the communication passage 8 on the inlet side of the valve box 6, the communication passage 10 on the outlet side, and the bypass passage 1.
2 is larger than each diameter d ₀ , and the thickness t is set to be slightly larger than the depth of the packing groove 14. Packing 15
The restrictions on the chord c and the thickness t in FIG. 17 are the same in FIGS. 17 and 18, and can be applied to the packing 15 ′ described later. FIG. 19 shows a sheet-like packing 15 'that becomes a truncated cone shape when seated in the packing groove 14', and FIG. 20 shows a packing 15 'originally formed in a truncated cone shape.

FIG. 7 shows the essential parts of the second embodiment when the packing 15 'as shown in FIGS. 19 and 20 is fitted in the packing groove 14', and the members in the first embodiment (see FIG. 1) are shown. The corresponding husbands are marked with "'". When the packing 15 'is frustoconical at the time of mounting, there is a feature that it is easy to assemble when the valve box 6'is tightly fitted, and the degree of fitting of the valve box 6'makes it possible to fit the packing 15' and the valve box 6 '. This is because the tight fitting condition with the outer peripheral edge can be adjusted.

[0040]

Operation of the Embodiment As shown in FIGS. 1 and 2, during depressurization and normal operation, the fluid flowing from the inflow port 2 into the valve box 6 is stored in the inflow hole 9, while the depressurizing valve section is used. When the fluid is also stored in the secondary side chamber 11 on the outlet 3 side, for example, if the faucet at the end of the branch pipe communicating with the branch port 40 is opened, the inside of the secondary side chamber 11 on the pressure reducing valve section outlet 3 side is opened. Since the fluid pressure of the diaphragm spring 33 is reduced, and therefore the pressure in the diaphragm chamber 33 is also reduced, the upward resilience of the adjusting spring 32, which has been in a balanced state by sandwiching the diaphragm 29, overcomes the fluid pressure. Since the valve rod 25 is pushed up to separate the valve body 26 from the upper end of the partition wall f of the valve seat 16 and the upper end is opened, the fluid stored in the inflow hole 9 and the fluid newly flowing from the inflow port 2 are The secondary side chamber 11 rises in the partition wall f and passes through the lower surface of the opened valve body 26. It flows out to.

When the water faucet of the terminal is closed, the secondary side chamber 11
When the fluid pressure in the inside increases, presses and lowers the diaphragm 29 and balances with the elastic force of the adjusting spring 32, the valve body 26
Adheres to the upper end of the partition f.

Thus, the fluid pressure on the outlet 3 side of the pressure reducing valve portion depends on the preset elastic force of the adjusting spring 32, and the fluid is constantly controlled under a constant pressure. to act underside an upper surface of the balance piston 25 _a to depress so at the same time as pushing up, both the thrust force acting upon Ben桿25 is balanced, Ben桿25 does not move up and down by variations in the water pressure from the inlet port 2 Therefore, there is no fear of affecting the fluid pressure on the pressure reducing valve outlet 3 side.

As shown in FIG. 2, the bypass strainer 13 can be removed in this switching state. That is, the lid 38
The bypass strainer that has been removed can be reattached after cleaning, but a new one may be attached, or it may be discarded and unequipped. This depressurization / normal operation is performed after the flash bypass strainer operation state described later.

The valve case 6 fitted a tool for example wrench to rotate gripping portion 6 _b of this was 90 degrees right rotation and to hold the valve body 6 itself to the position of FIG. 3, a flash. Bypass strainer action, the inflow port 2 through the bypass passage 12,
The communication path 8 on the inflow side and the communication path 10 on the exit side do not communicate with the inflow port 2 and the decompression valve section outlet 3, respectively, while the communication with the decompression valve section outlet 3 is directly performed. 12 flows from the inside of the bypass strainer 13 of the mounting, flows outwardly through the pressure reducing valve portion outlet 3 flow lumen 1 _b header body allows flow out from the branch port 40. Therefore, for example, flushing (preventing outflow of dust, gravel, and other contaminants in the fluid by the bypass strainer 13) at the beginning of use when newly installing or replacing the pipe connected to the inflow port 2 and the pressure reducing valve portion for a long time are used. Water can be supplied even during disassembly, inspection, repair, etc. At this time, the assembly unit 7 is removed from the valve box 6.

When the valve box 6 is rotated 45 degrees to the right from the position of FIG. 1 and held in the state of FIG. 4, it functions as a shut-off / inlet / outlet stop plug, and serves as an inflow port 2, a pressure reducing valve outlet 3, and a communication passage 8. , 10 and the bypass passage 12 are in a closed state, the fluid from the inflow port 2 and the fluid from the pressure reducing valve portion outlet 3 (when the head is on the outflow side from the branch port 40) are It does not flow into the portion 5, and is in a so-called inlet / outlet water stop state. Therefore, the branch pipe header according to the present invention has
There is no need for a rear valve, and even in this position

Similar to the above, the assembly unit 7 can be removed from the valve box 6 to inspect, clean, replace, and maintain each member. In addition, the valve box 6 is moved to the right from the position in FIG.
Even if it is rotated 5 degrees, the shaft-off entrance / exit stop plug state is obtained, and it is clear that the same function as in FIG. 4 is achieved.

The lumen header body ₁ from the pressure reducing valve unit outlet 3 _b
The fluid flowing into the branch port 40 via the
When reaching the constant flow rate double check valve 41 shown in FIG. 1, the first check valve body 46 is pressed and opened toward the second valve seat 44 along the flow direction, and after passing through the second valve seat 44, the second check valve Stop valve body 46
Is pressed and opened toward the lid 45 along the flow direction, flows into the branch pipe connecting joint p through the opening portion of the lid 45, and reaches the faucet of the terminal via the branch pipe. However, when the pressure of the fluid flowing into the branch port 40 is 2 kgf / cm ^{2 at} this time,
When the terminal faucet is open (fully opened), the pressure difference is 2 kgf / cm ²
Therefore, the water pressure inside the second valve seat 44 is reduced to 1 kgf / cm ^{2 because} it passes through the constant flow rate double check valve 41.
Eventually, the pressure difference passing through the first non-return valve body 46 and the second non-return valve body 46 is halved to 1 kgf / cm ^2, and therefore the above-mentioned flow noise is not obstructed and the pressure difference is halved. From this, the opening degree of each check valve body 46 can be set large,
Even if dust or foreign matter comes in, the valve body is less likely to be clogged. (Operation of dual constant flow valve)

Next, the backflow lid 45 is caused by the fluid flowing for some reason.
Even if it flows from the inside to the inside, the backflow of the fluid can be blocked by the contact and stop of the second check valve body 46 with the second valve seat 44, and the fluid inside the lid 45 should leak and the first check flows into the valve body 46 side, backflow into the branch port 40 and the header body lumen 1 _b by the abutment-stop on the first valve seat 43 of the first check valve 46 is prevented. [Operation of double check valve]

When the fluid from the branch port 40 reaches the constant flow rate decompression orifice body 52 shown in FIG. 12, it passes through the large and small diameter orifices 55, 55 'of the first orifice body 53 and then joins the decompression chamber 56. And then the second orifice body 5
After passing through the orifices 55 and 55 'of No. 4, the second orifice outlet 58 flows into the branch pipe connecting joint p, and reaches the terminal (water faucet) via the branch pipe. However, at this time, the fluid from the first orifice inflow port 57 is decelerated in the first orifice body 53, then flows into the decompression chamber 56 to be decompressed, and then decelerated again in the second orifice body 54, and the second orifice outflow port 58. To the branch pipe connecting joint p. Also in this case

When the pressure is set in the same manner as in (1), the pressure in the decompression chamber 56 becomes 1 kgf / cm ² , which is decelerated under a constant flow rate and the pressure is reduced in two steps. There is a flow noise prevention function, but there is no backflow prevention function. (Operation of constant flow decompression / deceleration orifice body)

As shown in FIG. 10, when the ball valve body 63 is housed in the branch port 40 ', the ball valve body 63
It is convenient for the user because the constant flow rate (restricted flow rate) from the branch port 40 'can be freely set by rotating and holding the valve at an arbitrary position (see FIG. 10, right side). Further, since the ball valve element 63 can be fully opened, it can be flushed, and is a constant flow valve suitable for a pressure reducing section not equipped with the bypass strainer 13. (See the left side of FIG. 10)

[0050]

[Effect] According to the present invention, the following effects can be obtained. First, to describe the effect of having a built-in pressure reducing valve, the conventional pressure reducing valve for water supply to individual doors was small and excellent in performance, and low noise type was an essential requirement. In order to guarantee a reliable installation of the pressure reducing valve that meets the conditions, it is preferable to form the branch pipe header for many good and bad cases, and if it is not installed, the equipment plan will be blisters. In addition, for leveling the water supply pressure, it is best that the pressure reducing valve is in the immediate vicinity of the header, and most of the water supply and hot water supply pipes in the sheath header method are resin pipes. It is preferable to reduce the pressure to the minimum necessary. (Improved durability). Incidentally, it is expected that the workability and workability utilizing the original flexibility of the resin pipe can be expected to be improved, for example, by reducing the wall thickness of the resin pipe from the current state to reduce the bending radius.

A meter box is installed in the vicinity of the water meter shown in FIG. 21, and there are pipes for gas and electricity in that place, which makes it difficult to allocate the space, but the branch pipe header according to the present invention. This is convenient because it is not necessary to install a pressure reducing valve for individual water supply in the meter box. In addition, a water supply header may be installed in the meter box, but a large space is required if the pressure reducing valve and the water supply header are separate, but it is sufficient to install the branch pipe header of the present invention only after the water meter, and a flat surface. When there is no space above, it is convenient to use vertical piping.

The branch pipe header of the present invention is provided with a pressure reducing valve portion having a built-in flush bypass passage, and in addition to having a water blocking function, maintenance of the pressure reducing valve portion and the faucet of the branch pipe terminal is performed. ， It has the advantage that it can be used for water stoppage at the time of inspection, and it is not necessary to separately provide a stop valve for water stoppage.
Also, in the past, short pipes and flexible pipes for flushing, which temporarily replace the door-to-door water supply pressure reducing valve required for flushing, are no longer required, and a union joint that is specially required for removing the pressure reducing valve. It is no longer necessary to add the piping member. In addition, the branch pipe header of the present invention,
Not only flushing work only at the time of facility completion, but also flushing work at any time and easily in response to contamination of dirt and dust caused by other factors such as external waterworks and cleaning of elevated tanks Running management etc. There are also advantages.

Although called a flash, it is often the case that the outflow of dust is prohibited recently. Dust accumulates on the bottom of the tanks on the downstream side, and the constant flow valve and the water faucet with a flow restriction are clogged quickly because the opening is small.However, in the branch pipe header according to the present invention, the bypass passage of the pressure reducing valve is used. It is equipped with a bypass strainer to capture dust and prevent it from flowing downstream. Then, when the flushing is over and the switching operation is performed to start the depressurization operation, the lid is manually operated and the bypass strainer is taken out. The removed strainer may be disposable or may be cleaned and reused.

Since the main parts of the pressure reducing valve except for the valve box are integrally formed as an assembly unit, this assembly unit can be easily attached to and detached from the valve box connected to the header and rotatably attached. Since the assembly unit can be manually removed without using a tool, it is possible to perform maintenance and inspection of the pressure reducing valve portion of the branch pipe header of the present invention, which is often installed in a narrow space.

The check valve is ideally provided for each faucet as a device for preventing contamination of clean water and contaminated water even within one house due to its effect, but it is cost effective to date. Although it has been considered difficult to adopt it from the standpoint of view, the branch pipe header according to the present invention has a check valve housed in the branch outlet of the outflow side, which makes it possible to prevent backflow of wastewater in one house as a system.

The check valve is a double valve (two in series).
Although the certainty is remarkably improved, they can be accommodated as an assembly unit in a small size and do not need to be accommodated, and can be accommodated in a single type or a double type as needed, which can contribute to pre-happing of equipment.

Constant flow valve (fixed throttle or orifice) housed in the outlet side branch port of the branch pipe header according to the present invention
Can limit the flow rate of each faucet to within an appropriate use flow rate, and prevent water splashing in a kitchen, a washroom, etc. due to excessive opening of the faucet. Also, even if one faucet was opened excessively, the maximum flow rate of that faucet was limited to within the proper usage amount, so there was no sudden drop in the header pressure, so it was used at the same time. It does not affect the use of other faucets or hot and cold water mixed faucet showers. In other words, it is possible to prevent discomfort due to thermal shock when using the shower and unexpected injuries due to hot water discharge in addition to maintaining an appropriate amount of water supply, which helps to save water charges and eliminate water shortages in the area. .

The effect of the present invention in which the full-open lift of the check valve is regulated in advance to a value commensurate with the predetermined flow rate to form the constant flow check valve is remarkably remarkable. That is, when the double type is used, the check valve naturally doubles the function of the constant flow valve, and further, the constant flow double check valve can be flushed while being housed in the branch pipe header of the present invention equipped with the bypass strainer. It is possible.

The constant flow rate decompression orifice body is a low noise type exclusively for dwelling units and has a large effect due to its simple structure.

Since each assembly unit such as the constant flow check valve or the constant flow pressure reducing orifice body housed in the outlet side branch port of the branch pipe header according to the present invention is constructed so as to be detachable from the header body, the pressure reducing valve It can be easily attached and detached without equipping a bypass strainer in the bypass passage of the part, can be flushed, and the branch pipe header is often installed in a narrow place, but for maintenance of the branch port storage assembly unit, It has the advantage that it can be inspected and, in addition, it can work without tools in a narrow space due to the structure that uses a hand-rolled union.

In the branch pipe header according to the present invention in which the ball valve is housed in the branch port to form the constant flow valve, the constant flow rate (limit flow rate) can be freely set, which is convenient for the user. And, since the ball valve is configured to be fully opened, flushing is possible without installing a bypass strainer in the bypass passage of the pressure reducing valve portion, and the effect of use is great, and the valve stored in the branch port is A sluice valve, a butterfly valve, or an elliptical valve may be used, and it is possible to freely select and hold the valve at a predetermined opening degree.

If a bypass strainer is not installed in the bypass passage of the pressure reducing valve section, if a constant flow double-type or single-type check valve or a constant flow pressure reducing orifice body is housed and transported in the inner cavity of the header body, it may cause forgiveness and damage. There is no fear of this, and there is the convenience that flush work can be performed immediately when the desired piping work is performed, and it can be expected that work efficiency will be improved for the construction worker. Of course, the three-dimensional unit is not limited to the above units.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical sectional view of a first embodiment according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part taken along line II-II of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part when the bypass passage of FIG. 1 is directly connected.

FIG. 4 is an enlarged transverse cross-sectional view of a main part of the same when shutting off.

FIG. 5 is a side view of the bypass strainer.

6 is an enlarged vertical cross-sectional view of the pressure reducing valve assembly unit of FIG. 1 removed from the valve box.

FIG. 7 is a longitudinal sectional view of a main part of a second embodiment different from FIG.

8 is a vertical cross-sectional view of another embodiment of a pressure reducing valve assembly unit different from that in FIG.

FIG. 9 is a partially cutaway vertical sectional view of a third embodiment in a packed / shipped state.

FIG. 10 is a vertical cross-sectional view of a partially cutaway main part of a fourth embodiment in which a ball valve is installed at a branch port.

FIG. 11 is an enlarged vertical cross-sectional view of the constant flow rate double check valve removed from the branch port of FIG.

FIG. 12 is a vertical sectional view of an embodiment of a constant flow pressure reducing orifice body housed in a branch port.

FIG. 13: No. 5 when a constant flow rate double check valve is stored in the branch port
FIG. 4 is a vertical cross-sectional view with a part cut away in the embodiment.

FIG. 14 is a cross-sectional view of a cylindrical packing.

FIG. 15 is a vertical sectional view of the above.

FIG. 16 is a cross-sectional view of another embodiment of the same.

FIG. 17 is a plan view of the sheet-like packing.

FIG. 18 is a plan view of another embodiment of the above.

19 is a plan view of the sheet-like packing stored in FIG. 7. FIG.

FIG. 20 is a vertical sectional view of the frustoconical packing of the above.

FIG. 21 is a perspective view of the piping procedure of the sheath pipe header construction method.

FIG. 22 is an enlarged perspective view of the assembly of the water supply / hot water supply pipe and the sheath pipe.

FIG. 23 is a vertical cross-sectional view of a conventional water supply pressure reducing valve for each door.

24 is a cross-sectional view taken along the line YY of FIG.

FIG. 25 is a vertical cross-sectional view in which a conventional branch pipe header is partially cut away.

FIG. 26 is a partially cutaway vertical sectional view of a conventional branch pipe header in which a constant flow valve is built in a branch port.

FIG. 27 is a vertical cross-sectional view of a conventional single type check valve.

[Explanation of symbols]

1,1 ', 1 ", 1"' header body 1 _a, 1 _'a fitting hole 1 _{b, 1'} b, 1 _'b lumen 2 inlet 3 pressure reducing valve unit outlet 4, 4' packing guide pipes 5 , 5 ', 5 "pressure reducing valve 6, 6', 6" valve box 6 _b, 6 _'b rotating gripping portion 7, 7' the pressure reducing valve assembly unit 8, 8 'inflow-side communication path 9 inflow hole 10 of the , 10 'outlet side of the communication passage 11 secondary chamber 12 the bypass passage 13 bypassing the strainer 14, 14' packing groove 15, 15 'packing 16 and 16' valve seat 16 _a valve seat opening 17 countersunk head screws 18, 18 ', 18 ″ Spring protection cylinders 18 _a , 18 ′ _a Female threads 18 _h , 18 ′ _h Tsuba 18 ′ _r Four faces (for rotation prevention) 19 “O” ring 20 “O” ring 21, 21 ′ Pressure reducing valve strainer 22 Retaining ring 23 “ "O" ring 24 "O" ring 25,25 'valve rod 2 5 _a Balance piston 25 _b Two-sided (grasping part) 25 _r Reduced diameter part 26 Valve body 27 Valve body retainer 28 Nut 29 Diaphragm 30 Diaphragm receiver 31 Nut 32, 32 ', 32 "Adjusting spring 33, 33' Diaphragm chamber 34 Valve seat support primary chamber 35, 35 'adjusting screws 36 "O" ring 37 bypass strainer mounting port 38 lid 39 "O" ring 40, 40', 40 "branch port 40 _a fitting hole 41 a constant flow double check valve 42 for the tube Tapered screw 43 First valve seat 43 _a Recess 44 Second valve seat 44 _a Convex portion 44 _b Recess 45 Lid 45 _a Convex portion 46 Check valve body 46 _a Soft seat 47 Spring 48 “O” ring 49 “O” "ring 50 Union collar 50 _a tube taper female thread 51 union nut 51 _a knurl 51 _r reduced diameter portion 52 a constant flow vacuum orifice 53 First Orifice Body 54 Second Orifice Body 55, 55 'Orifice 56 Decompression Chamber 57 First Orifice Inlet 58 Second Orifice Outlet 59, 59' Spring Bearing 60 "O" Ring 63 Ball Valve Body 64 Ball Valve Seat 65 Lid 65 _a Tapered female thread for pipe 66 Valve rod 66 _a Slot for rotation 67 Stopper 68 Set screw 69 Convex portion of main body 70 Base plate 71 Tapered male thread for pipe 72 Flow rate indicator label 73 Plug 74 Packaging box 75 Pan head screw 76 Union collar 77 gasket 78 Yuniton'natto 79 pan head screw 80 the strainer chamber lid 81 "O" ring 82 valve body 83 valve seat 84 spring 85 valve body 86 guide tube 87 the spring 88 check valve body 88 _a soft sheet 89 valve seat 90 union nut 91 Union flange a stepped portion e hanging portion f bulkhead h, _{h 1} h _{2, h 3} hole i through hole j male screw n slots p branch pipe connecting fittings (male adapters) _q 1, _{q 2} protrusions w walls w ₁ hanging portion

Claims (6)

[Claims] 1. A pressure reducing valve portion is rotatably fitted between an inlet port and an outlet side branch port of a header body, and the header body inlet port and the pressure reducing valve portion are responsive to the rotating position of the pressure reducing valve portion. A branch pipe header characterized in that both a passage and an outlet can be opened and closed at the same time, and a pressure reducing valve portion is internally provided with a bypass passage that connects these passages to each other. 2. The branch pipe header according to claim 1, wherein a bypass strainer is detachably mountable to the bypass passage from the outside of the header body. 3. The pressure reducing valve portion comprises a valve box rotatably fitted in a header body, and an assembly unit detachably attached to the valve box. The assembly unit includes an adjusting spring, a diaphragm, and a valve rod. A combination of a spring protection cylinder and a valve seat body, in which a pressure reducing valve strainer and a valve body are externally mounted, and these members can be disassembled, inspected and maintained. Branch pipe header described. 4. An assembly unit in which a constant flow decompression orifice body, which is a combination of a plurality of constant flow check valves or a plurality of orifices having a plurality of small holes, can be attached to and detached from the outlet side branch port of the header body. The branch pipe header according to claim 1, wherein the branch pipe header is housed in the same manner. 5. The branch pipe header according to claim 1, wherein a ball valve having a selectable holding position is installed at the outlet side branch port of the header body. 6. A constant flow decompression orifice body, which is formed by combining a plurality of constant flow check valves or a plurality of orifices having a plurality of small holes in the outflow side lumen of the header body, can be stored and transported. Claims 1, 2,
The branch pipe header according to any one of 3 and 4.