JPH09137867A - Sluice valve and sluice valve unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost sluice valve even when the sluice valve is formed of stainless by a method wherein a valve seat member having a valve seat is arranged at a different member from a water distribution pipe and the valve seat member is fixed at the water distribution pipe. SOLUTION: A valve seat member 5 having a valve seat 4 situated in a pipe is arranged in a water distribution pipe 1 and the valve seat member 5 is fixed in the water distribution pipe 1 by welding. The valve seat member 5 is formed in a cylindrical shape, and a slope wherein the more the opposite surface of a valve element 10 is extended to below, the more the opposite surface is positioned rightward. An opening 6 is formed in the slope and the periphery of the opening 6 is a valve seat 4. A guide member 7 having an opening 8 formed facing the slope of a valve seat member 5 is welded in a similar manner described above in the water distribution pipe 1 and side guides 9 extending to the valve seat member 5 are integrally formed at the two sides of the guide member 7. The valve seat member 5 and the guide member 7 are a member different from the water distribution pipe 1 and afterwards fixed in the water distribution pipe 1, whereby the members are manufactured by press working of a stainless sheet material with thickness of several mm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided between a water distribution pipe and a water supply pipe, and the valve body is lowered along a valve rod to be seated on a valve seat so that the space between the water distribution pipe and the water supply pipe is reduced. The present invention relates to a sluice valve and a sluice valve unit.

[0002]

2. Description of the Related Art Conventionally, for supplying water to condominiums and buildings, a method is used in which tap water is temporarily stored in a water tank, pumped up to a height higher than the top floor by a pump, and supplied to each house. In such a water supply system, a gate valve is provided in front of the pump, and when the pump is stopped, the water distribution pipe is shut off to prevent backflow of water and the like. In the method of temporarily storing water in such a water tank, there is a problem in hygiene due to dust and the like entering the water tank. In recent years, water is directly supplied to each house from a water pipe for water supply in condominiums, buildings, etc. A direct water supply system is desired. In this direct connection water supply system as well, in order to obtain the desired water pressure on the top floor, pressure is applied using a pump, and a sluice valve for shutting off the water distribution pipe when this pump is stopped is essential.

As shown in FIG. 5, a conventional sluice valve is constructed such that a valve body 50 having a wedge-shaped cross section is brought into contact with a valve seat 52 formed in a water pipe 51. . In this case, the water distribution pipe 51 is circular, and the valve body 50 that closes it is also circular. Further, two valve bodies 50 are provided back to back, and when the valve bodies 50 are lowered from the open state, they are fitted into both valve seats to block the passage. Since this sluice valve is usually made of iron casting, it has a problem that rust appears with time and tap water becomes cloudy red. In order to solve this rust problem, it has been proposed that the sluice valve be made of stainless casting.

[0004]

However, the sluice valve requires the valve seat 52 to have a certain width in order to surely seat the valve body 50 on the valve seat 52, and thus the valve seat 52 is required.
The thickness of the water pipe 51 is also increased. For this reason, if the sluice valve is made of stainless casting, a large amount of stainless material must be used, and there is a problem in that manufacturing costs such as material costs increase.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an inexpensive gate valve even if the gate valve is made of stainless steel. Another object of the present invention is to provide a novel sluice valve unit for direct water supply.

[0006]

In order to achieve the above object, the present invention is provided between a water distribution pipe and a water supply pipe, and lowers a valve body along a valve rod to be seated on a valve seat. In the partition valve for partitioning between the water pipe and the water supply pipe by the above, the valve seat member having the valve seat is provided as a member separate from the water pipe, and the valve seat member is fixed to the water pipe. It has a feature.

Further, according to the present invention, guide members which are opposed to each other with the space between the valve seat members are fixed to the water pipe, and when the valve body is fitted between the guide member and the valve seat member, It is effective.

Further, the present invention is effective when a layer of an elastic member is provided on a surface of the valve body which is seated on the valve seat. In order to achieve the above object, the present invention relates to a sluice valve unit provided in a sluice valve for partitioning a water distribution pipe and a water supply pipe, in which liquid is pumped to each water supply pipe.
One water distribution pipe is provided, and a sluice valve is provided between each water distribution pipe and the water supply pipe.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front sectional view showing an embodiment of a gate valve and a gate valve unit according to the present invention, and FIG. 2 is a side sectional view thereof.

In FIGS. 1 and 2, reference numerals 1 and 1'denominate water distribution pipes in which water is conveyed in the directions of arrows by different pumps (not shown). As clearly shown in FIG. 2, the water supply pipe 2 bent at 90 °
Is provided. A sluice valve 3, is attached to this water pipe 1, 1 '.
3'is provided, and the sluice valves 3, 3'are symmetrical, but the sluice valve 3 will be described because the structures are the same. The water distribution pipes 1 and 1 ', the water supply pipe 2, and the sluice valves 3 and 3'are generally made of stainless steel.

As shown in FIGS. 1 and 3, the water distribution pipe 1 is provided with a valve seat member 5 having a valve seat 4 therein.
In this example, the valve seat member 5 is fixed in the water distribution pipe 1 by welding. The valve seat member 5 is formed in a cylindrical shape, and the facing surface of the valve body 10 described later is formed in an inclined surface that becomes rightward as it goes downward. An opening 6 is formed on this inclined surface, and the valve seat 4 is around the opening 6. A guide member 7 having an opening 8 facing the inclined surface of the valve seat member 5 is also fixed in the pipe of the water distribution pipe 1 by welding, and the guide member 7 has side portions extending to the valve seat member 5 on both sides thereof. The guide 9 is integrally provided. Since the valve seat member 5 and the guide member 7 are separate members from the water distribution pipe 1 and are fixed in the water distribution pipe 1 later, they can be made by pressing a stainless plate material of several millimeters.

As shown in FIGS. 1 and 4, the valve body 10 is formed in a wedge shape so as to be inserted between the valve seat member 5 and the guide member 7, and is screwed to the valve rod 11. Valve stem 11
Is rotatably attached to the valve lid 12, and a handle 13 is attached to the upper end thereof. The valve rod 11 does not move vertically even when rotated, and the valve body 10 whose rotation is blocked by the valve seat member 5 and the guide member 7 is vertically moved along the valve rod 11 so that the valve body 10 moves. It is moved between a position where the water pipe 1 shown by a solid line is cut off and a position where the water pipe 1 shown by a chain line is opened.

A rubber plate material 14 as a film-shaped elastic member is attached to the valve body 10 on the opposite surface of the valve seat 4. The rubber plate material 14 makes the valve body 10 airtight. It is seated on the valve seat 4. Further, since the rubber plate member 14 is provided, even if a slight error occurs in the mounting position of the valve seat member 5, it is also allowed. Further, by providing the rubber plate material 14, it is possible to adapt the valve seat 4 of the sluice valve 3 even if the valve seat 4 is slightly deformed by pressure or the like.

Reference numeral 15 is a check valve, and the sluice valve 3 cannot be opened and closed rapidly, and prevents water from flowing back in the meantime. Reference numeral 16 is a pipe for disposing a flow meter (not shown) for measuring the amount of water flowing to the water supply pipe 2.

In the sluice valve 3 thus constructed, the valve seat member 5 and the guide member 7 can be made by pressing a stainless material, so that the material cost of the stainless material is reduced and the sluice valve made of stainless is inexpensive. Can be provided. Moreover, the valve seat 4 of the valve seat member 5 can have a large contact area with the valve body 10, and the water pipe 1 can be reliably shut off. Further, in the sluice valve 3, the valve body 10 and the valve seat 4 are required to have high accuracy, and when the valve seat member 5 is made by press working, it causes a mounting error of the valve seat member 5, but the valve seat of the valve body 10 Since the rubber plate material 14 is attached to the facing surface of 4,
A small error can be tolerated.

Next, the sluice valve unit most suitable for the direct connection water supply system in the embodiment shown in FIG. 1 will be described. Water is conveyed from the directions of the arrows to the water distribution pipes 1 and 1'by different pumps and is sent to the water supply pipe 2 through the sluice valves 3 and 3 '. Therefore, since the sluice valves 3 and 3'are provided in the water distribution pipes 1 and 1'in which water is pumped by separate pumps to one water supply pipe 2, even if one pump fails or maintenance is performed, water supply is performed. Do not have to stop.

[0017]

According to the first aspect of the invention, since the valve seat member having the valve seat is provided as a member separate from the water pipe, and the valve seat member is fixed to the water pipe, the valve seat member is made of stainless steel. Since the material can be manufactured by press working and the material cost of the stainless material is reduced, it is possible to provide an inexpensive stainless gate valve. Moreover, the valve seat of the valve seat member can have a large contact area with the valve body, and the water pipe can be reliably shut off.

According to the second aspect of the invention, the guide members, which are opposed to each other with the valve seat member interval, are fixed to the water distribution pipe,
Since the valve body is fitted between the guide member and the valve seat member, the valve body can be reliably seated on the valve seat, and the guide member can also be made by pressing a stainless material.

According to the third aspect of the invention, since the layer of the elastic member is provided on the surface of the valve body which is seated on the valve seat, a slight mounting error of the valve seat member can be allowed. According to the configuration of claim 4, two water distribution pipes for respectively pumping the liquid are provided for one water supply pipe, and a sluice valve is provided between each water distribution pipe and the water supply pipe. It is possible to prevent the water supply from being stopped even when the pump of FIG.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a sluice valve and a sluice valve unit according to the present invention.

FIG. 2 is a front sectional view of FIG.

FIG. 3 is a side view showing a valve seat member and a guide member of the embodiment shown in FIG.

FIG. 4 is a front view showing the valve body of the embodiment of FIG.

FIG. 5 is a sectional view showing a conventional gate valve.

[Explanation of symbols]

 1,1 'Water distribution pipe 2 Water supply pipe 3,3' Gate valve 4 Valve seat 5 Valve seat member 7 Guide member 10 Valve body 11 Valve rod 14 Rubber plate member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area F16K 3/12 F16K 3/12 Z

Claims (4)

[Claims] 1. A water pipe is provided between the water distribution pipe and the water supply pipe,
In a sluice valve that partitions a water pipe and a water pipe by lowering a valve body along a valve rod and seating it on a valve seat, a valve seat member having the valve seat is provided as a member separate from the water pipe. And the valve seat member is fixed to the water distribution pipe. 2. The sluice valve according to claim 1, wherein guide members arranged opposite to each other with the valve seat member interval are fixed to the water distribution pipe, and the valve is provided between the guide member and the valve seat member. A sluice valve whose body fits in. 3. The sluice valve according to claim 1, wherein a layer of an elastic member is provided on a surface of the valve element seating on the valve seat. 4. A sluice valve unit provided in a sluice valve for partitioning a water supply pipe and a water supply pipe, wherein two water distribution pipes for respectively pumping liquid to one water supply pipe are provided, A sluice valve unit, which is equipped with a sluice valve between the water supply pipe and each.