JP3418757B2 - Stop 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 stop valve used as, for example, a water tap or a water stopcock.

[0002]

2. Description of the Related Art For example, most of the water hydrants use a water hydrant body (valve box) made of cast metal. When a hollow faucet body is made of casting, a core is required. The core is usually molded by mixing sand and resin and heating, but since it is necessary to provide a valve seat in the main body of the faucet,
The part of the core corresponding to the valve seat is narrowly constricted. Then, the core is placed in a mold such as a sand mold, the melted metal is poured into the mold, and the metal is cooled and solidified to obtain a cast water faucet body.

[0003]

When the molten metal is poured into the mold, the heat of the metal burns the core placed in the mold to generate gas. This gas usually passes through the inside of the core and escapes to the end of the core.However, in the core for forming the main body of the faucet, the portion corresponding to the valve seat is narrowed as described above, so the gas escapes. It's getting worse. However, if the gas does not escape sufficiently, defective molding is likely to occur, and in particular, cavities are likely to be formed in the molded product due to the gas. Such burrows cause water leakage and adversely affect the finish of the surface, which is not preferable. Further, when the molten metal poured into the mold hits a narrowly constricted portion of the core, there is a possibility that the core may break at the same portion.

An object of the present invention is to provide an excellent product in a stop valve used as a water faucet, a water stopcock, etc. even if the valve box is made of cast metal without causing the above-mentioned molding failure. Is to

Another object of the present invention is to provide a stop valve in which the pipe joint can be used as a part of a valve box, thereby reducing the burden of storage space, unit price, etc. due to inventory management of the stop valve. Moreover, for example, a simple faucet can be easily installed at a construction site.

[0006]

Means for Solving the Problems and Effects of the Invention In the stop valve according to the present invention, the valve box has a cylindrical inlet passage portion,
A valve box main body having an outlet flow passage portion and a valve body insertion opening portion, a tubular fitting portion that is tightly fitted in one of the inlet flow passage portion and the outlet flow passage portion, and the other And a partition portion having a wall portion that is provided so as to be continuous with the distal end portion of the fitting portion so as to partition the inside of the flow passage portion and the fitting portion, and that has a wall portion facing the valve body inserted into the valve body from the valve body insertion opening portion. A hollow body for forming a valve seat, wherein the wall portion has a through hole whose outer peripheral surface is a valve seat .
The protrusion is formed on the outer surface of the base end of the insertion part.
In addition, the fitting part has a valve box so that the partition wall faces the valve body.
The same protrusion when it is fitted into the one flow path part of the main body
A notch that fits in is formed at the opening edge of the flow path.
It is characterized by

The stop valve includes the valve box body and the valve seat forming hollow body as described above, and the outer surface of the peripheral portion of the through hole of the wall portion of the partition of the hollow body facing the valve body serves as the valve seat. If
With respect to the valve box body, it is not necessary to integrally form a valve seat inside the valve box body. Therefore, even when the valve box main body is made of cast metal, it is not necessary to provide the core used for manufacturing the valve box with a narrowed portion corresponding to the valve seat, unlike the conventional valve box. Therefore, the gas generated when the molten metal is poured into the mold in which the core is arranged easily passes through the core to the end, and there is a concern that the core may hit the poured molten metal and break. Since it does not exist, molding failure is unlikely to occur and an excellent product can be obtained. On the other hand, the valve seat forming hollow body is also substantially tubular with the tubular fitting portion and the partitioning portion as described above, and has a simple structure, so that it can be easily manufactured regardless of the material and the manufacturing method. Can be manufactured.

Moreover, the projections and the notches as described above should be formed on the outer surface of the base end of the fitting portion of the valve seat forming hollow body and on the opening edge of one flow passage of the valve body. In this case, the hollow body can be easily positioned in the circumferential direction when the fitting portion of the hollow body is fitted into the one flow path portion of the valve box main body, and the efficiency of the assembling work can be improved. Further, an effect of preventing the valve seat forming hollow body from being displaced in the circumferential direction can be obtained. In addition, the cutout, the opening edge of one flow path portion of the valve box body,
In addition to the slit shape that extends from the inner surface to the outer surface, it may have an L-shaped cross section that extends from the inner surface to the middle of the thickness of the opening edge portion.

The present invention can be applied to a valve of basically any structure or application as long as it is a stop valve, that is, a valve in which a valve element operates in a direction perpendicular to a valve seat by operating a valve rod. . Specifically, for example, it can be applied to various types of water faucet and water stopcock. In the case of a faucet, not only a single faucet but also a hot and cold water mixed faucet can be applied. When applied to a hot and cold water mixing faucet, for example, two inlet flow passages and two valve body insertion openings are provided in the valve box body, and two valve seat forming hollow bodies are prepared. A hollow body may be fitted into the to form two sets of valve bodies and valve seats. In addition, in the case of a water stopcock, it can also be applied to those installed at the branch part of the water supply pipe, and in that case, a plurality of outlet flow passage parts corresponding to the number of branch pipes of the water supply pipe are provided in the valve box body. You can do it like this.

The valve box body is not limited to a cast product, but may be a forged product, a press molded product, a synthetic resin molded product or the like. Similarly, the material and manufacturing method of the valve seat forming hollow body are not particularly limited, and examples thereof include casting, forging, press molding, and synthetic resin molding.

The fitting portion of the hollow body for forming the valve seat may be fitted into either the inlet passage portion or the outlet passage portion of the valve body, but the fitting portion is fitted into the outlet passage portion. In this case, when the flow passage is closed due to the close contact of the valve element with the valve seat, the fluid pressure acts to push the fitting portion out of the outlet flow passage portion. ,
It is preferable that the fitting portion is fitted in the inlet channel portion.
The fitting portion is tightly fitted into the inlet flow path portion or the outlet flow path portion of the valve box body, and then is usually fixed to the valve box body by welding, bonding or the like. Further, in order to improve the sealing property between the fitting portion and the flow path portion, it is preferable to seal the both with an O-ring or a seal tape.

The partition portion of the hollow body for forming a valve seat is arranged at the intersection of the inlet flow passage portion, the outlet flow passage portion and the valve body insertion opening portion in the main body of the valve box, and its shape is such that the hollow body is fitted therein. It is appropriately determined according to the positional relationship between the one flow path part into which the part is fitted and the other flow path part and the valve seat insertion opening part, the arrangement of the valve body (open position and closed position), and the like.

As another form of the stop valve according to the present invention, a valve
Each box has a cylindrical shape and has an external thread.
Valve box having a mouth flow passage, an outlet flow passage, and a valve body insertion opening
The main body and one of the inlet flow path section and the outlet flow path section
Cylindrical fitting part that fits tightly into one flow path part, and
Is fitted so as to separate the inside of the flow path part and the inside of the fitting part on the other side.
Is provided in series with the tip of the valve and from the valve body insertion port
A partition having a wall portion facing the valve body inserted in the box body
A wall, and the outer surface of the hole peripheral portion serves as a valve seat in the wall portion.
A valve seat forming hollow body having a through hole formed therein.
Ri, flange is formed in the hollow body, the flange O-
And press it against the opening end face of the one flow path part
As shown in the figure, the hollow body fixing nut is
Some are screwed.

Still another form of the stop valve according to the present invention
As a state, the valve box is cylindrical and has an internal thread.
The inlet flow passage, the outlet flow passage, and the valve body insertion opening
With a valve box main body, and an inlet flow passage and an outlet flow passage
Cylindrical fitting that can be tightly fitted into either channel
Part and the inside of the flow path part on the other side and the fitting part
It is provided in series with the tip of the insertion part and the valve element is inserted.
The wall facing the valve body inserted into the valve box body from the mouth
A partition portion having an outer peripheral surface of a hole and a valve seat on the wall portion.
And a valve seat forming hollow body in which a through hole is formed.
It is equipped with a male screw part in the fitting part of the hollow body.
The male screw part of the
Some are screwed into the female thread.

In the stop valve according to the present invention, the main body of the valve box is a T-shaped or Y-shaped pipe joint, and the three tubular portions of the pipe joint are respectively the inlet passage portion, the outlet passage portion and the valve body insertion. In some cases, it is used as a mouth. In addition, the valve box main body is formed of a cross-shaped pipe joint, any one of the four tubular portions of the pipe joint serves as a valve body insertion port, and any one of the other three tubular portions. Alternatively, two may be the inlet flow passage and the rest may be the outlet flow passage. In the case of the conventional stop valve, the valve box is for the stop valve only, so the storage space, unit price, etc. have been heavy due to inventory management.
In the stop valve of the present invention, the existing T-shaped, Y-shaped or cross-shaped pipe joint can be used as it is as the valve body as described above, so that the above-mentioned burden can be reduced, and For example, it becomes possible to temporarily and easily install the faucet at a construction site or the like.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described below with reference to the drawings. In addition, in the following description, up, down, left, and right mean the up, down, left, and right of FIGS. 3 and 6 to 12.

1 to 3 show a first embodiment of the present invention. The stop valve (1) of this embodiment is used as a water tap, and the valve box (2) is a valve box body.
(3) and a valve seat forming hollow body (4). Valve box body
(3) is made of cast metal, and each has a cylindrical inlet flow path portion (3
1), it has an outlet channel part (32) and a valve body insertion port part (33). The valve seat forming hollow body (4) is made of cast metal, and has a tubular fitting portion (41) that is tightly fitted in the inlet flow passage portion (31), and the inside of the outlet flow passage portion (32) and the fitting portion. Fitting part (4
It has a wall portion (421) which is provided so as to be connected to the front end portion (left end portion) of 1) and which faces the valve body (5) inserted into the valve body (3) from the valve body insertion opening (33). A partition part (42), and the wall part
A through hole (43) is formed in the (421) so that the outer surface of the hole peripheral portion serves as the valve seat (6). Further, the hollow body (4) is provided with a tubular pipe joint portion (44) which is provided continuously to the base end portion (right end portion) of the fitting portion (41) and has a male screw portion (441) on the outer peripheral surface. There is.

As shown in FIGS. 1 to 3, the valve box main body (3) is a T-shaped tube, and the tubular portion whose right end is open is the inlet flow passage portion (31) and the left end is open. The tubular portion formed is the outlet flow passage portion (32), and the tubular portion having an open upper end is the valve body insertion opening portion.
It is said to be (33). And, in the portion where the inlet flow passage portion (31), the outlet flow passage portion (32) and the valve body insertion opening portion (33) intersect,
There is no portion where the inner diameter is narrowed unlike the conventional valve box in which the valve seat is integrally formed.

A protrusion (45) is formed on the lowermost portion of the outer surface of the proximal end (right end) of the fitting portion (41) in the hollow body (4), and the wall portion (421) of the partition portion (42) is formed. A notch into which the projection (45) fits when the fitting part (41) is fitted into the inlet flow path part (31) of the valve body (3) so that the fitting faces the valve body (5). (31
1) is formed at the lowermost portion of the opening edge portion in the inlet flow path portion (31). The notch (311) has an L-shaped cross section that extends from the inner surface of the opening edge portion of the inlet channel portion (31) to the middle of the thickness of the same. The proximal end portion of the fitting portion (41) in the hollow body (4) is the inlet flow passage portion (3) in the valve body (3).
It is welded to the opening edge of 1).

The valve box body (3) is further provided with an outlet flow path section (32).
The tubular pipe joint portion (34) is provided continuously to the left end portion of the. An annular step (342) is provided in the middle of the inner peripheral surface of the pipe joint part (34) so that the inner part of the pipe joint part (34) has a smaller diameter, and to a position slightly deeper than the step (342). The base end of the water discharge pipe (7) is rotatably inserted. An annular concave groove (74) is formed in a portion near the base end of the water discharge pipe (7), and an inward convex portion of an annular flange member (72) having a T-shaped cross section is fitted into the groove (74). It is fixed. Flange member (7
In the portion between 2) and the step (342), the water discharge pipe (7) and the pipe joint (34) are sealed by a grooved packing (71). The packing (71) may be a U packing. A flange member (7
A male screw portion (341) into which the discharge pipe fixing nut (73) is screwed is formed in a state where the outward convex portion of 2) is pressed against the open end surface (left end surface) of the pipe joint portion (34).

The valve body insertion port (33) is covered with a lid (8). The lid (8) has a top wall with a spindle insertion hole in the center.
(81) and a peripheral wall portion (82) extending downward from the peripheral edge of the top wall portion (81) and having a lower portion fitted into the valve body insertion opening (33). On the outer peripheral surface of the middle part of the height of the peripheral wall part (2),
A flange (83) to be placed on the upper end surface of the (33) is provided. Further, a step (84) for receiving the top wall portion (91) of the lid holding nut (9) is provided in a portion of the outer peripheral surface of the peripheral wall portion (82) immediately above the flange (83). Lid retaining nut (9)
Is adapted to be screwed into a male screw part (331) formed on the upper outer peripheral surface of the valve body insertion port part (33). The spindle (11) that is rotatably inserted in the top wall (81) of the lid (8)
It has a male screw part (111) in the lower part arranged inside (8). An annular recess (112) is provided in the spindle (11) immediately above the top wall (81) of the lid (8).
A washer (12) is fitted in 2) to prevent the spindle (11) from falling down. When the spindle (11) is pulled out upward, the upper end of the male screw (111) is covered by the O-ring to the lid (8).
It is prevented by coming into contact with the lower surface of the top wall portion (81) of the.
A step is provided on the inner peripheral surface of the peripheral wall portion (82) of the lid (8) at substantially the same height as the flange (83), and the inner diameter of the lower part of the step is larger than that of the upper part. The male screw part (111) of the spindle (11) is fitted into the female screw part formed on the inner peripheral surface of the bottomed cylindrical spindle connecting part (131) above the top (13). The lower part of the top (13) has a shape like an inverted dish, and has a rod-shaped male screw part (not shown) at the center of the downward opening concave part of the valve body mounting part.
(132) is provided. The valve body (5) is made of rubber, for example, and has a disc shape having a hole (not shown) through which a rod-shaped male screw portion is inserted as a center, and its upper portion is a downward opening concave portion of the valve body mounting portion (132). And is attached to the valve body attachment portion (132) by a nut (14) that is fitted into the rod-shaped male screw portion and screwed into the tip portion of the rod-shaped male screw portion. The spindle connecting portion (131) of the top (13) is vertically slidably fitted in a portion below the step inside the lid (8).

The partition part (42) of the valve seat forming hollow body (4) has a shape in which a bottomed cylinder having a rounded tip is laid flat and the upper part thereof is flatly crushed. Horizontal wall (421)
However, it faces the valve body (5). Then, a circular through hole (43) having a diameter slightly smaller than the outer diameter of the valve body is formed in the horizontal wall portion (421), and the outer surface of the peripheral portion of the through hole (43) is used as the valve seat (6). . This partition (42) is the valve body
It is arranged at a portion where the inlet channel portion (31), the outlet channel portion (32) and the valve body insertion port portion (33) in (3) intersect.

The faucet constituted by the stop valve (1) described above is rotated at a height position of the spindle (11) by rotating a handle (not shown) attached to the upper end of the spindle (11). As a result, the top (13) is moved up and down, whereby the valve body (5) is brought into close contact with and separated from the valve seat (6) to stop and discharge water.

When manufacturing the cast valve box body (3) of the stop valve (1), a core is required. The shape of the core is the valve box body shown in FIGS. The shape conforms to the internal shape of (3), and there is no constricted part like the core for manufacturing a conventional cast valve box. Therefore, the gas generated when the molten metal is poured into the mold in which the core is arranged passes smoothly through the inside of the core to the end of the core. Further, there is no fear that the core will hit the molten metal that has been poured and break. Therefore, a molding failure is unlikely to occur and an excellent product can be obtained. On the other hand, the valve seat forming hollow body (4) also includes the tubular fitting portion (41), the partition portion (42) and the tubular pipe joint portion as described above.
(43) is a substantially tubular shape and has a simple structure, so that it is easy to manufacture.

4 to 6 show a second embodiment of the present invention. The stop valve (101) of this embodiment is also shown in FIG.
~ Similar to the stop valve (1) of the first embodiment shown in Fig. 3, it is used as a water tap, except for the following points,
This is the same as the stop valve (1) of the first embodiment.

That is, in this embodiment, the fitting portion (41) of the hollow body (104) is fitted into the outlet flow passage portion (32) of the valve body (103). The partition part (42) is the fitting part (41).
It is provided so as to be continuous with the tip portion (right end portion) of the fitting portion (41) so as to partition the inside from the inside of the inlet flow path portion (31) of the valve body (103).

A protrusion (45) is formed at the lowermost portion of the outer surface of the base (left end) of the fitting portion (41) in the hollow body (104), and the horizontal wall portion (421) of the partition portion (42) is formed. ) Faces the valve body (5), the fitting part (41) is connected to the outlet flow path part (3) of the valve body (103).
A notch (321) into which the protrusion (45) fits when it is fitted into the inside 2) is formed at the lowest part of the opening edge portion of the outlet flow path portion (32). The cutout (321) is located in the outlet flow path (32).
It is formed in a slit shape extending from the inner surface to the outer surface of the opening edge portion. The base end portion of the hollow body (104) is welded to the opening edge portion of the outlet flow passage portion (32) in the valve box body (103).

Further, the hollow body (104) is a tubular pipe joint portion (4) provided continuously to the base end portion (left end portion) of the fitting portion (41).
4) is equipped. In the middle part of the inner surface of the pipe joint (44),
An annular step (442) is provided so that the inner part has a smaller diameter than this, and the base end of the water discharge pipe (7) is rotatably inserted to a position slightly deeper than this step (442). ing.
An annular groove (74) is formed in a portion of the water discharge pipe (7) near the base end, and the annular flange member (72) having a T-shaped cross section is formed in the groove (74).
The inward convex part of is fitted and fixed. In the portion between the flange member (72) and the step (442), the water discharge pipe (7) and the pipe joint (44) are sealed by the grooved packing (71). The packing (71) may be a U packing. On the outer peripheral surface of the pipe joint part (44), with the outer convex portion of the flange member (72) being pressed against the opening end face (left end face) of the pipe joint part (34), the discharge pipe fixing nut (73) Is formed with a male screw part (441).

The valve box body (103) has an inlet flow passage portion (31).
Of the male screw (34
The pipe joint portion (34) having 1) is integrally provided.

FIG. 7 shows a third embodiment of the present invention. The stop valve (201) of this embodiment is used as, for example, a simple water stopcock at a construction site, etc., and is the same as that of the first embodiment shown in FIGS. 1 to 3 except for the following points. Same as stop valve (1).

That is, in this embodiment, the valve box body (203) of the valve box (202) is made of a T-shaped steel pipe joint generally called cheese, and the tubular portion of which the right end is open is formed. The inlet channel portion (31), the tubular portion whose left end is opened is the outlet channel portion (32), and the tubular portion whose upper end is opened is the valve body insertion port portion (33). This pipe joint is a screw-in type having a male screw portion (312, 322, 331) for pipe connection on the outer peripheral surface of each tubular portion (31, 32, 33).

Cylindrical pipe joint part of hollow body (204) for forming a valve seat
The (44) has a flange (442) at its valve box body (203) side end, that is, at the left end, and this flange (442) passes through the O-ring (15) to the inlet flow path section. The hollow body fixing nut (16) is screwed into the male screw part (312) of the inlet channel part (31) so as to be pressed against the open end face of the (31).

FIG. 8 shows a fourth embodiment of the present invention. Similarly to the third embodiment, the stop valve (301) of this embodiment is also used as a simple water stopcock at, for example, a construction site, and is shown in FIG. 7 except for the following points. This is the same as the stop valve (201) of the third embodiment.

That is, in this embodiment, the T-shaped steel pipe joint which constitutes the valve box body (303) of the valve box (302) has the inner circumference of each tubular portion (31, 32, 33). Female thread (313, 3
23,333).

Cylindrical pipe joint part of hollow body (304) for valve seat formation
(441) has no flange, but hollow body (304)
A female screw portion (313) formed on the inner peripheral surface of the inlet flow path portion (31) through a seal tape (not shown) on the outer peripheral surface of the fitting portion (41) of
A male screw portion (411) that is screwed in is provided continuously with the male screw portion (441) of the pipe joint portion (44).

Further, in the outer peripheral surface of the peripheral wall portion (82) of the lid (80) below the flange (83), the female screw portion (333) formed on the inner peripheral surface of the valve body insertion opening (33) is O-shaped. A male screw part (85) screwed through a ring is provided so that the lid (80) can be fixed to the valve body (303) without a lid holding nut.

FIG. 9 shows a fifth embodiment of the present invention. Similarly to the third embodiment, the stop valve (401) of this embodiment is also used as a simple water stopcock at, for example, a construction site, and is shown in FIG. 7 except for the following points. This is the same as the stop valve (201) of the third embodiment.

That is, in this embodiment, the T-shaped steel pipe joint which constitutes the valve box body (403) of the valve box (402) has a female threaded portion on each tubular portion (31, 32, 33). , None of the male screw parts are provided, but the tube end insertion step (324, 334) is provided in the cylindrical part (32) with the left end open and the cylindrical part (33) with the upper end open.
It is a plug-in type provided with.

Cylindrical pipe joint part of hollow body (404) for valve seat formation
The (44) is not provided with a flange, and the base end of the fitting portion (41) is welded to the opening edge of the inlet channel portion (31) of the valve body (403).

The valve body insertion opening (33) in the valve box body (403)
A cylindrical attachment (17) having an external thread portion (171) on the outer peripheral surface and an inwardly facing flange (172) received on the upper end surface of the valve body insertion opening (33) on the inner peripheral surface of the upper end portion at the upper part of ) Is fitted and welded. Then, with the flange of the lid (8) placed on the upper surface of the inward flange (172) of the attachment (17), the male screw portion (1) of the attachment (17) is
The lid holding nut (9) can be screwed into 71).

FIG. 10 shows a sixth embodiment of the present invention. The stop valve (501) of this embodiment is used as, for example, a simple water stopcock at a branch portion of a water supply pipe at a construction site or the like.
It is the same as the stop valve (201) of the third embodiment shown in FIG.

That is, in this embodiment, the valve box main body (503) of the valve box (502) is made of a cross-shaped steel pipe joint generally called a cross, and the tubular portion with the right end open is formed in the pipe joint. The inlet flow passage portion (31), the left end open tubular portion and the lower end open tubular portion are two outlet flow passage portions (32A, 32B), and the upper open tubular portion is the valve body insertion opening ( 33). This pipe joint is a screw-in type having an external thread portion (312, 322, 331) for pipe connection on the outer peripheral surface of each tubular portion (31, 32A, 32B, 33).

FIG. 11 shows a seventh embodiment of the present invention. The stop valve (601) of this embodiment is also used as a simple water stopcock at a construction site, etc., and the stop valve (301) of the fourth embodiment shown in FIG. 8 is provided except for the following points. ) Is the same.

That is, in this embodiment, the valve box main body (60) of the valve box (602) is provided by the T-shaped steel pipe fittings arranged in the lateral direction.
3) is configured, the tubular portion with the lower end opened is the inlet channel portion (31), the tubular portion with the left end opened is the outlet channel portion (32), and the upper end is tubular. Is the valve body insertion port (33)
Has been made.

As shown in FIG. 11, the valve seat forming hollow body (604) has a substantially vertical tubular shape, and the partition portion (42A).
The peripheral wall (4) that is extended from the upper end of the fitting part (41).
20) and a horizontal top wall portion (421) facing the valve body (5). Then, a circular through hole (43) having a diameter slightly smaller than the outer diameter of the valve body (5) is formed in the center of the top wall portion (421), and the outer surface of the peripheral portion of the through hole (43) is the valve seat (6 ).

FIG. 12 shows an eighth embodiment of the present invention. The stop valve (701) of this embodiment is used as a hot and cold water mixing valve.

The stop valve (701) has a valve box (2) including a valve box main body (703) and two left and right valve seat forming hollow bodies (704).

The valve box body (703) is made of casting and is shown in FIG.
As shown in FIG. 2, it is a hollow one provided with three tubular parts on the left and right and the center of which the upper end is opened, and two lower tubular parts on the left and right of which the lower end is opened. And the lower end opening tubular portion on the right side is the water inlet flow passage portion (31C), the left lower end opening tubular portion is the hot water inlet flow passage portion (31H), and the central upper end opening tubular portion is the outlet flow. The upper end opening tubular portion on the right side is the water valve body insertion opening portion (33C), and the upper left opening tubular portion is the hot water valve body insertion port portion (33H). Between the intersection of the inlet flow passages (31C, 31H) and the valve body insertion opening (33C, 33H) for water and hot water, and the outlet flow passage (32), the connecting flow passage ( 35)
Is provided, and the mixing of water and hot water is mainly performed in the communication flow path section (35). As is clear from FIG.
Since there is no portion with a reduced inner diameter inside the valve box body (703), molding defects are unlikely to occur and excellent products can be obtained as in the above embodiments.

The two valve seat forming hollow bodies (704) are also made of cast metal, and as shown in FIG. 12, they are closely fitted in the inlet flow passages (31C, 31H) for water and hot water, respectively. Tubular fitting part
(41) is provided so as to partition the inside of the outlet flow path part (32) and the inside of the fitting part (41) so as to be continuous with the tip part (upper end part) of the fitting part (41) and for water and hot water, respectively. The wall portion (4) facing the valve body (5) inserted into the valve body (703) from the valve body insertion opening (33C, 33H)
And a partition part (42B) having 21), and the wall part (421) is formed with a through hole (43) whose outer peripheral surface of the hole serves as the valve seat (6). Further, each hollow body (704) is provided so as to be continuous with the base end portion (lower end portion) of the fitting portion (41) and has a male screw portion (4
It is provided with a tubular pipe joint portion (44) having 41). The partition part (42B) is formed of a horizontal wall part (421) provided so as to cover the upper end opening of the fitting part (41) and facing the valve body (5). Then, a circular through hole (43) having a diameter slightly smaller than the outer diameter of the valve body (5) is formed in the center of this horizontal wall portion (421), and the outer surface of the peripheral portion of the through hole (43) is a valve seat ( 6) It is said that. Fitting part (4
On the outer peripheral surface of 1), a male screw part (411) is provided continuously with the male screw part (441) of the pipe joint part (44).

Each inlet flow path portion (31 C,
A female screw portion (313) into which the male screw portion (411) of the fitting portion (41) of each hollow body (704) is screwed is formed on the inner peripheral surface of (31H) via a seal tape (not shown).

An annular step (324) is provided in the intermediate portion of the inner peripheral surface of the outlet flow path portion (32) of the valve box body (703) so that the diameter of the inner portion is smaller than that of the inner portion. The base end of the discharge pipe (7A) is rotatably inserted to a position slightly deeper than the step (324). An annular concave groove (74) is formed in a portion near the base end of the water discharge pipe (7A), and an inner convex portion of an annular flange member (72) having a T-shaped cross section is fitted into the groove (74). It is fixed. In the portion between the flange member (72) and the step (324), the water discharge pipe (7A) and the outlet flow passage portion (32) are sealed by a grooved packing (71). In addition, packing (71)
May be U packing. On the outer peripheral surface of the outlet channel portion (32), the outward convex portion of the flange member (72) is provided with the outlet channel portion (32).
A male screw part (322) into which the discharge pipe fixing nut (73) is screwed is formed in a state of being pressed against the opening end face (upper end face) of the.

Each valve body insertion opening (33) in the valve box body (703)
A female screw portion (333) into which the male screw portion (85) formed on the outer peripheral surface of the peripheral wall (82) of the lid (80) is screwed is formed on the inner peripheral surface of (C, 33H). In addition, the lid (80), spindle (11), washer
The (12), the top (13), and the valve body (5) are the same as those of the seventh embodiment shown in FIG. 11, so detailed description will be omitted.

The above-described embodiments are merely examples, and it is of course possible to implement the present invention with appropriate changes without departing from the scope of the present invention as set forth in the claims. is there.

[Brief description of drawings]

FIG. 1 is an exploded lower perspective view of a stop valve according to a first embodiment of the present invention.

2 is an exploded lower perspective view of a valve box main body and a valve seat forming hollow body in the stop valve of FIG. 1. FIG.

3 is a vertical cross-sectional view of the stop valve of FIG.

FIG. 4 is an exploded lower perspective view of the stop valve according to the second embodiment of the present invention.

5 is a bottom perspective view of a valve seat forming hollow body in the stop valve of FIG. 4. FIG.

6 is a vertical longitudinal sectional view of the stop valve of FIG.

FIG. 7 is a vertical longitudinal sectional view of a stop valve according to a third embodiment of the present invention.

FIG. 8 is a vertical longitudinal sectional view of a stop valve according to a fourth embodiment of the present invention.

FIG. 9 is a vertical longitudinal sectional view of a stop valve showing a fifth embodiment of the present invention.

FIG. 10 is a vertical longitudinal sectional view of a stop valve showing a sixth embodiment of the present invention.

FIG. 11 is a vertical longitudinal sectional view of a stop valve showing a seventh embodiment of the present invention.

FIG. 12 is a vertical longitudinal sectional view of a stop valve showing an eighth embodiment of the present invention.

[Explanation of symbols]

(1) (101) (201) (301) (401) (501) (601) (701): Stop valve (2) (102) (202) (302) (402) (502) (602) (702) ): Valve box (3) (103) (203) (303) (403) (503) (603) (703): Valve box body (31) (31C) (31H): Inlet channel part (311): Notch (32) (32A) (32B): Outlet flow path part (321): Notch (33) (33C) (33H): Valve body insertion port part (4) (104) (204) (304) ( 404) (504) (604) (704): Hollow body for valve seat formation (41): Fitting part (42) (42A) (42B): Partition part (421): Horizontal wall part (wall facing the valve body Part) (43): Through hole (45): Protrusion (5): Valve body (6): Valve seat

Claims (5)

(57) [Claims] 1. A valve box main body having a tubular inlet flow passage portion, an outlet flow passage portion, and a valve body insertion opening portion, and one of an inlet flow passage portion and an outlet flow passage portion. A tubular fitting portion that is tightly fitted in the flow passage portion, and a valve body that is provided in series with the tip end portion of the fitting portion so as to partition the inside of the other flow passage portion from the inside of the fitting portion and from the valve body insertion opening portion. A partition part having a wall part facing the valve body inserted therein,
And a said wall portion into the hole periphery the outer surface is hollow for a valve seat formed is formed with a through hole made with a valve seat body, projections are formed on the base end outer faces of the fitting portion in the hollow body
And the partition wall is fitted so that it faces the valve body.
The inlet was fitted into the one flow passage of the valve box body.
The notch that the protrusion fits into is the opening edge of the flow path.
A stop valve, which is characterized in that 2. An inlet flow path in which each valve box has a cylindrical shape and is formed with a male screw portion.
Body having valve section, outlet flow path section and valve body insertion opening section
And one of the inlet channel and the outlet channel
Cylindrical fitting part that is tightly fitted in the part, and the other
The tip of the fitting part so as to divide the inside of the flow path part and the inside of the fitting part
Is installed in series and is inserted into the valve body from the valve body insertion opening.
A partition part having a wall part facing the inserted valve body,
A through hole is formed in the wall portion, the outer surface of the hole peripheral portion serving as a valve seat.
And a flange for forming an O-ring.
Is pressed against the opening end face of the one flow path portion via
Screw the hollow body fixing nut onto the male thread of the same flow path.
Stop valve, characterized by being fitted. 3. An inlet flow path in which each valve box has a cylindrical shape and an internal thread portion is formed.
Body having valve section, outlet flow path section and valve body insertion opening section
And one of the inlet channel and the outlet channel
Cylindrical fitting part that is tightly fitted in the part, and the other
The tip of the fitting part so as to divide the inside of the flow path part and the inside of the fitting part
Is installed in series and is inserted into the valve body from the valve body insertion opening.
A partition part having a wall part facing the inserted valve body,
A through hole is formed in the wall portion, the outer surface of the hole peripheral portion serving as a valve seat.
The hollow body for valve seat formation is provided, and a male screw portion is formed in the fitting portion of the hollow body.
Through the sealing tape to the female thread of the one flow path
A stop valve characterized by being entangled. 4. The valve box main body is formed of a T-shaped or Y-shaped pipe joint, and three tubular portions of the pipe joint are formed as an inlet flow passage portion, an outlet flow passage portion, and a valve body insertion opening portion, respectively. The stop valve according to any one of claims 1 to 3, which is characterized by being provided. 5. The valve box main body is formed of a cross-shaped pipe joint, any one of the four tubular portions of the pipe joint serves as a valve body insertion port, and any one of the other three tubular portions. The stop valve according to any one of claims 1 to 3, wherein one or two are formed as an inlet flow passage and the rest are formed as an outlet flow passage.