JPH10281333A - Float valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a valve to well operate over a long period, while attaining facilitation of assembly work. SOLUTION: This float valve is constituted such that a tank 1 for storing liquid is provided, also a pipe body 3 connected to a pump for sucking up liquid stored in this tank 1 is arranged in the tank 1, the valve is provided in a lower part of this pipe body 3. Here, this constitution is formed such that in a lower end lateral side surface of the pipe body 3, a liquid taking in opening part is formed, or a separate member formed with a liquid taking in opening part 8 in a lateral side surface is connected to a lower end of the pipe body 3, a sheet member 9 mounting an upper end in the upward from the liquid taking in opening part is provided, this sheet member 9, by its own buoyancy in the tank 1 storing liquid, is rolled up, so as to provide an opening attitude opening the opening part 8, and in a condition without water, by the own weight, a closed attitude closing the opening part 8 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction in which a liquid (for example, water or oil such as gasoline) stored in a tank is sucked up through a pipe by a pump, and the liquid stored in the tank is exhausted. The present invention relates to a float valve provided at a lower portion of the pipe to stop the suction.

[0002]

2. Description of the Related Art A float valve of this type is designed to prevent air from being taken in together with a liquid (for example, water or oil such as gasoline) when the remaining amount of the liquid (for example, oil such as gasoline) is reduced. This is for blocking the liquid intake opening.

[0003] Conventionally, as an example of the above-mentioned float valve, there is one disclosed in Japanese Patent Publication No. 2-36480.
This is configured as follows with a float valve provided in a fuel supply pipe disposed in a tank for storing liquid fuel such as gasoline at a gas station. That is, a U-shaped water remover having an upward opening communicating with the lower end opening by being fitted to the lower end of the oil supply pipe is provided, and a ring shape capable of closing the opening of the water remover is provided. It is constructed by using a float valve and providing a stopper for preventing the ring-shaped float valve from floating upward. When the liquid fuel stored in the tank is full, the float valve configured as described above rises to a position where the ring-shaped float valve comes into contact with the stopper by its own buoyancy, thereby opening the upward opening. The liquid fuel stored in the tank can be sucked up in the open state. When the remaining amount of the liquid fuel stored in the tank decreases, the ring-shaped float valve gradually descends due to its own weight, and finally descends to a position at which the upward opening is closed.

[0004] According to the above configuration, a large number of parts must be assembled to the oil supply pipe in the order of the stopper, the ring-shaped float valve, and the water remover, so that the assembling work is troublesome. In addition, since the ring-shaped float valve is configured to be fitted on the oil supply pipe, as described above, for example, when the ring-shaped float valve is at the upper position due to buoyancy, dust and the like may be found on the outer surface of the oil pipe below. If the liquid adheres, the float valve cannot be lowered due to dust even if the remaining amount of the liquid stored in the tank becomes small. As a result, the upward opening cannot be closed, and air may be taken in with the liquid fuel, leaving room for improvement. When the above-mentioned float valve is used for a fire prevention water tank, the water for the fire prevention water tank is often not used for a long period of time, so that algae may be generated in the tank, and the algae may be supplied by water. It also adhered to the outer surface of the tube and could not close the upward opening as described above.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention is intended to solve the above problem, which can facilitate the assembling work, and can operate well for a long period of time. In providing a float valve.

[0006]

In order to solve the above-mentioned problems, the present invention provides a tank for storing a liquid and a pipe connected to a pump for sucking up the liquid stored in the tank. Is disposed in the tank, and provided at the lower portion of the pipe body, wherein a liquid intake opening is formed in a lateral side surface at a lower end of the tubular body, or a liquid intake side is formed in the lateral side surface. A main body having an opening formed therein is connected to the lower end of the tube, and a sheet member having an upper end attached above the liquid intake opening is provided.
In the tank in which the liquid is stored, the opening is opened by opening the opening by being rolled up by its own buoyancy, and the opening is closed by its own weight in the absence of water. It is characterized by doing. Therefore, when the inside of the tank is full of liquid, the sheet member is turned up by its own buoyancy, and the opening is opened so that the liquid can be sucked up. Then, the liquid stored in the tank is gradually reduced by being sucked up, and when the buoyancy of the sheet member stops acting, the sheet member changes its posture to the closed posture side by its own weight, and finally the sheet member is The opening is closed to prevent the tube from inhaling air. When the liquid is water, the water in the tank is often not used for a long period of time, so that algae are generated on the outer surface of the tube, and dust or the like adheres to the outer surface of the tube. Even in this case, the posture change of the sheet member from the open posture to the closed posture is not prevented by algae, dust and the like, and the posture can be surely changed. Moreover, as the position approaches the closed position, the sheet member easily receives the suction force of the water pressure and changes its position to the closed position.

The tubular body or the main body is made of a synthetic resin, and when the tubular body or the main body is molded, a plurality of concave portions are formed on the outer surface thereof at the same time. Since the liquid intake openings are formed, the liquid intake openings can be formed through these concave portions as marks, and the liquid intake openings can be easily and quickly formed. . In particular, when a large number of liquid intake openings are formed, the openings can be more easily opened at predetermined positions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a large number of fire prevention water tanks 1 serving as tanks for storing water, and these fire prevention water tanks 1.
A pump 2 for sucking up the water stored therein, a water absorption pipe 3 connected to the pump 2 and disposed in a fire protection water tank 1,... And a lower part of the water absorption pipe 3 And a float valve 4 for the fire tank. In the figure, one pump 2 is provided for a large number of fire protection water tanks 1..., However, the pump 2 may be provided for each fire protection water tank 1. Further, the number of fire prevention water tanks 1 may be any number such as one or two. INDUSTRIAL APPLICABILITY The present invention can be applied to a gas station storing oil such as gasoline and other equipment storing liquid.

The fire prevention water tank 1 has at least a bottom portion and a side portion so that water can be stored therein, and may be made of any material such as concrete, metal, and synthetic resin. Also, as the cross-sectional shape, other than a circle and an ellipse, a triangle, a polygon such as a quadrangle may be used,
Any shape may be used. As shown in FIG. 1, a large number of water-absorbing pipes 3...
Is connected via hose A, but hose A
, That is, the shorter the distance between the water suction pipe 3 and the pump 2, the larger the amount of water suctioned. Therefore, the water stored from the fire protection water tank 1 whose distance from the pump 2 is short among a large number of fire protection water tanks 1. It will be empty. In order to prevent the occurrence of a problem that the air is sucked in by the fire prevention water tank 1 when it becomes empty and water cannot be sucked up from the remaining fire prevention water tank 1, or some fire prevention water tanks 1 due to a ground crack due to an earthquake or the like. The float valve 4 is provided so that the pumping can be continued from the remaining fire prevention water tank 1 even when the container becomes empty.

The water absorption pipe 3 is a synthetic resin hose having an inner diameter slightly larger than the outer diameter of the upper end of the float valve 4 so that the upper end of the float valve 4 can be screwed and connected to the lower end thereof. It consists of. The material and shape of the water absorption pipe 3 are not limited to these.

Hereinafter, the float valve 4 will be described. As shown in FIG. 2 to FIG. 4, a cylindrical upper end portion 5 having a circular cross-sectional shape having a screw portion which can be screwed into a lower end of the water absorption pipe 3 at an upper portion, and extends downward from the lower end of the cylindrical upper end portion 5. And a pair of front and rear side wall plates 7A extending downward from the lower end of the tubular intermediate portion 6 in parallel with each other.
7A, inclined plate portions 7B, 7B whose distance from each other increases toward the lower end, and a lower end portion 7 composed of a horizontal posture bottom plate portion 7C connecting the lower end portions of the side wall plate portions 7A, 7A and the inclined plate portions 7B, 7B. The members 5, 6, and 7 are integrally formed of polyethylene. Numeral 10 shown in the figure denotes concrete in a state of being poured into the bottom plate portion 7C and solidified, and is for preventing the water-absorbing pipe 3 from being lifted by buoyancy in the fire prevention water tank 1 in which water is stored. The float valve 4 is constituted by a member separate from the water absorption pipe 3 and the float valve 4 and the water absorption pipe 3 are connected. However, if the float valve 4 and the water absorption pipe 3 are integrally formed, The operation of connecting the two members can be eliminated.

As shown in FIG. 5, a large number of recesses 7b are formed integrally with the inclined plate portions 7B, 7B.
The holes 8 are opened with reference to b. These holes 8 are openings for taking in water formed in the lower side surface of the water absorption pipe 3. As shown in FIG. 4, the holes 8 are made up of three rows of four holes formed at equal intervals in the vertical direction, and three rows formed at equal intervals in the vertical direction between these three rows. By arranging the rows of holes and arranging the holes in the rows of three holes to be displaced in the horizontal direction with respect to the holes in the rows of four holes, the inclined plate is formed. Part 7B,
Many holes can be formed without lowering the shape retention strength of 7B.

Above the water intake openings 8, that is, in the cylindrical intermediate portion 6, a thickness of 2 mm and a density of 200 to 50 k are provided.
The upper end 9A of the sheet member 9 made of closed-cell foamed polyethylene having a specific gravity of 0.2 g / m ³ (0.2 to 0.05) is bonded. While immersed in the water in the fire prevention water tub 1, the sheet member 9 configured as described above is caused by its own buoyancy as shown in FIG.
As shown in (a), the water can be turned up and the water in the fire protection water tank 1 can be sucked up through the openings 8..., And the water stored in the fire protection water tank 1 gradually decreases as the water is sucked up. When the buoyancy of the sheet member 9 stops working, the sheet member 9 changes its posture toward the closed position by its own weight, and finally, as shown in FIG. To prevent the suction pipe from sucking air. At this time, the water level in the fire prevention water tank 1 is near the lower end of the sheet member 9,
The function of the sheet member 9 prevents the water absorbing tube 3 from sucking up the full water. The material and shape of the sheet member 9 are not limited to those described above. Further, the opening for water intake is constituted by a large number of holes 8, but may be constituted by one large hole, and the number of holes may be set to any number. In the case of a single large hole, only one sheet member 9 is provided.

FIG. 6 shows another shape of the float valve 4. That is, the lower end portion 7 is formed in a box shape composed of four lateral side wall plate portions 7A standing on the upper surface of the bottom plate portion 7C, and the shape of the float valve 4 is limited to these. It is not something to be done.

After the float valve 4 and the water absorption pipe 3 are screwed in, a tape is wound around the connection so that they are not separated from each other, and a sealing process is performed. The float valve 4 and the water-absorbing pipe 3 may be fixed with a certain adhesive or the like, and the specific configuration for fixing them is not limited to these.

[0016]

According to the first aspect of the present invention, the opening is switched between the open state and the closed state by changing the posture of the seat member having the upper end attached thereto. In the case where the float valve is moved with respect to the oil supply pipe, a float valve which can be operated satisfactorily for a long period of time without any inconvenience caused by dust, algae and the like attached to the outer surface of the oil supply pipe can be provided. In addition, the float valve can be configured only by attaching the seat member to the upper end of the opening, which is advantageous in terms of assembly.

According to the second aspect, if the concave portion is integrally formed on the outer surface of the water absorption pipe or the cylindrical body, the concave portion is used as a mark,
An opening for water intake can be easily and quickly formed. In addition, by adopting a configuration in which a plurality of openings are opened, it is possible to prevent the shape retention strength of the float valve from being extremely reduced while maintaining the same opening area as compared with the case where a single opening having a large opening area is provided. can do.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing fire prevention water tank equipment.

FIG. 2 is an exploded perspective view of a float valve.

FIG. 3A is a vertical side view showing an open position of the float valve, and FIG. 3B is a vertical side view showing a closed position of the float valve.

FIG. 4 is a front view of the float valve without a seat member mounted thereon.

FIG. 5 is a partially cut-away longitudinal side view showing a state in which no hole is formed in the float valve.

FIG. 6 is a partially cutaway longitudinal side view showing another form of the float valve in a state where the seat member is not mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire prevention water tank (tank) 2 Pump 3 Water absorption pipe 4 Float valve 5 Cylindrical upper end part 6 Cylindrical middle part 7 Lower end part 7A Side wall plate part 7B Inclined plate part 7C Bottom plate part 7b Concave part 8 Hole (opening for water intake) 9) Sheet member 9A Upper end 10 Concrete A Hose

Claims (2)

[Claims] 1. A tank for storing a liquid is provided, and a pipe connected to a pump for sucking up the liquid stored in the tank is provided in the tank, and a pipe is provided at a lower portion of the pipe. A float valve having an opening for liquid intake formed on the lower side surface of the lower end of the tube, or a separate member having an opening for liquid intake formed on the side surface at the lower end of the tube. A sheet member having an upper end attached above the opening for taking in the liquid is provided, and the sheet member is turned up by its own buoyancy in a tank in which the liquid is stored, so that the opening is formed. The float valve is configured to be in an open position to open the opening and to be in a closed position to close the opening by its own weight in a state without water. 2. The tube or the body is made of a synthetic resin, and a plurality of recesses are simultaneously formed on an outer surface of the tube or the body when the tube or the body is formed. 2. The float valve according to claim 1, wherein the opening for taking in the liquid is formed.