JPS63106486A - Float valve device for water channel - Google Patents

Abstract

PURPOSE:To miniaturize the float valve device for a water channel in the caption by arranging a valve body right below a float while connecting the valve body to the float through a toggle mechanism. CONSTITUTION:In a water bath 2, a guide pipe 7 extending in the vertical direction is arranged right above the opening end of an inlet pipe 3 with the axial line thereof mated to the center of the opening end. An annular float 8 capable of being vertically moved is provided around the guide pipe 7, and a valve rod 12 capable of being moved vertically is inserted into a bearing 13 inside the guide pipe 7. On the lower end the above valve rod, a valve body 14 which can close the opening end of the inlet pipe 3 in engagement to the valve seat 5 is attached. One end of a link 22 is linked to one end of a lever 21 and the other end of the link 22 is linked to the float 8 so as to form the toggle mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides a float valve that is capable of releasing the pressure of a pipe waterway to the atmosphere at one end to lower the pressure of the waterway on the downstream side and regulating the flow rate to the downstream side. Regarding equipment.

(b) Prior art In waterways, if the water source is located at a high place, the water pressure increases in proportion to the height of the water source, so the piping must also be made durable in accordance with the height of the water source. However, the height of the water source is 30
m or more, the cost of piping materials increases, and therefore it is necessary to reduce the pressure in the middle of the waterway. For this reason, a pressure reducing device has conventionally been installed in the middle of the waterway.

As shown in FIG. 4, the conventional structure of such a pressure reducing device is that an inlet pipe and an outlet pipe C are connected to the bottom of a water tank a, and a float (1 is movable downward in -E) is connected to the bottom of a water tank a. The float d is connected to one end of a lever f rotatably supported by a fulcrum e, and a valve body i is provided above the open end of the inlet pipe and is engageable with a valve seat formed at the open end. Generally, the valve body i is connected to the other end of the lever f, and the opening end of the inlet pipe is opened and closed by the valve body according to the vertical movement of the float.

However, in such a conventional device, the float and the valve body are of a balance type, which causes problems such as an increase in the size of the water tank and the need for a valve body guide j and a valve body i that are spaced apart in the circumferential direction.
There is a problem that foreign matter may enter between the valve seat or rest on the valve seat, causing malfunction or seal failure.

(C) Problems to be Solved by the Invention The problems to be solved by the present invention are a float valve device for waterways by arranging the valve body directly below the float and connecting the valve body to the float via a toggle mechanism. The objective is to reduce the size of the system, eliminate malfunctions, and make it possible to regulate the flow rate.

(d) Means for Solving the Problem The present invention provides a water tank having an inlet pipe and an outlet pipe connected to the lower part thereof, a float provided in the water tank, and a flow control system connected to the float. - In a float valve device for a waterway, comprising a valve body that opens and closes the open end of the inlet pipe according to the vertical movement of the water tank, in which a guide pipe extending vertically is arranged above the open end of the inlet pipe in the water tank. is arranged so as to substantially coincide with the center of the opening end, the float is arranged around the guide tube so as to be movable up and down, and connected to one end of a lever provided at the -F section of the guide tube, The valve body is disposed between the open end of the inlet pipe and the lower end of the guide pipe, and the valve body is attached to the lower end of a valve rod movably provided in the guide pipe, and the valve stem is attached to the lever. It is connected to the other end.

(E) Function In the above configuration, when there is no water in the tank, the float is lowered to the bottom of the tank, so the valve body rises to open the open end of the inlet pipe. Therefore, water supplied from the inlet pipe enters the water tank and then flows out from the outlet pipe. If water usage in the downstream area is low, the flow out of the outlet pipe will be less than the flow in through the inlet pipe, causing water to accumulate in the aquarium and causing the float to rise. This causes the valve body to lower and reduce the flow of water from the inlet tube, and when the valve body engages the valve seat, the inflow of water is stopped.

When the water level in the room on the float side is changed by the weir by 1%, the height of the weir determines the opening position of the valve body with respect to the float's waterline, so the flow rate flowing in the tank is also regulated, and the planned setting The amount of water supplied is less than the specified maximum water flow rate.

(F) Embodiments Below, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, the float valve device for waterways W! of this embodiment! ,
1 is shown. In the figure, 2 is an aquarium, 3 is an inlet pipe connected to the bottom 25 of the aquarium, and 4 is an outlet pipe, which is also connected to the bottom of the aquarium. A valve seat 5 is formed around the open end of the inlet pipe 3.

Inside the water tank 2, a guide pipe 7 extending in the vertical direction is disposed directly above the open end of the inlet pipe 3 and with its axis aligned with the center of the open end. separated in the direction,
A plurality of stems 6 arranged on the radially outer side of the float
It is attached to the bottom of the aquarium 2 via. This stem 6 prevents foreign matter from getting caught between the valve body and the valve seat,
Dust clogging in the stem itself can be detected directly from the top of the WJt and can be easily removed.

An annular float 8 is provided around the guide tube 7 so as to be movable up and down. The guide tube 7 is further attached with an outer cylinder 9 and a bottom plate 10, which together with the guide tube constitute a container.

A bleed hole 11 is formed in the lower part of the outer cylinder 9.

This bleed hole 11 prevents water in the water tank from immediately entering the container partitioned by the outer cylinder 9.

A valve rod 12 is inserted into the guide pipe 7 so as to be movable up and down by a bearing 13, and a valve body 14 is attached to the lower end of the valve rod, which can engage with the valve seat 5 to open and close the open end of the inlet pipe 3. It is being The upper end of the valve stem projects above the guide tube, and a link holder 15 is attached thereto. The link holder 15 is attached to the annular bridge 17 at the upper end of the valve stem 12.
A claw portion 18 protrudes inward in the radial direction of the link holder 15.
The position can be adjusted using an adjustment bolt 16 screwed into the link holder.

A pair of brackets 1-20 are arranged at diametrically symmetrical positions on the upper part of the guide tube 7, and a lever 21 is rotatably attached to each of the brackets. Each lever 2
One end of a link 22 is pivotally connected to one end of the link 22.
The other end is pivotally connected to the float 8. Further, one end of a link 23 is pivotally connected to the other end of each lever 21, and a link holder 15 is pivotally connected to the other end of the link 23.

Therefore, when the float 8 is in the lower position close to the bottom plate 10 as shown in FIG. Although the open end is open, when the float 8 rises, the valve stem 12 is opened via the lever 21 and links 22 and 23.
Then, the valve body 14 is lowered to limit the flow of water from the inlet pipe 3 into the tank, and completely stops the flow of water when the valve body engages the valve seat.

At the bottom 25 of the water tank 2, a partition wall 26 is formed that projects upward and partitions the bottom of the tank into two chambers 27 and 28 between the open end of the inlet pipe 3 and the open end of the outlet pipe 1. has been done.

A well-known weir 30 of JllI3a is provided in contact with the partition wall 26 so as to be movable up and down. This weir 30 is connected to a screw shaft 32 that is provided at the top of the water tank and rotated by a motor 31, for example.
The water level in the chamber 27 can be changed by moving it up and down in a known manner.

The above-mentioned flow 1 to valve device 1 connect the inlet pipe 3 to the downstream side waterway (high pressure side) A, as shown in FIG. 2, for example,
It is used by connecting the outlet pipe 4 to the secondary waterway (low pressure fftll) B to reduce the water pressure in the secondary waterway.

In the above configuration, when there is no water in the water tank and the float 8 is lowered and the valve body 14 is separated from the valve seat 5, water flows into the chamber 27 of the water tank 2 from the inlet pipe 3. When the water level in the chamber 27 rises by 1 and exceeds the upper edge of the weir 30, it flows over the weir 30 into the chamber 28 and flows out through the outlet pipe 4. On the other hand, when water accumulates in the chamber 27 of the aquarium, the water gradually enters the outer cylinder 9 through the bleed hole 11, and the water level therein also gradually rises, and the flows 1 to 8 also begin to rise. float 8
begins to rise, lever 21 and link 2.2.2
3, the valve stem 12 begins to descend and the valve body 14 also begins to descend toward the valve seat 5, and the float 8 stops at a height determined by the water level in the chamber 27 determined by the height of the weir 30. At the same time, the valve body 14 also stops lowering. therefore,
A stream 5 flowing into the chamber 27 of the water tank 2 from the open end of the inlet pipe 3
f is limited to a flow rate determined by the opening position of the valve body 14. When the weir 30 is raised and the water level in the chamber 27 rises, the float 8 rises accordingly, so the valve body 14 descends accordingly, and the amount of hydroxyl flowing into the chamber 27 from the inlet pipe 3 also decreases. Then, with the valve body 14 engaged with the valve seat 5, the flow is completely stopped.

During the lowering and closing operations of the valve body, the force of the water pushing up the valve body 14 increases as the valve body approaches the valve seat, so the force of the float 8 to push the valve body down must also increase accordingly. 1. In the device of the present invention, I'/f<F is the force pushing down the valve body by the toggle mechanism consisting of the lever 21 and the links 22, 23, and f is the buoyant force due to the flow 1~. ) becomes larger when the valve body is in contact with the valve seat as shown in FIG. 3, which meets the above requirements.

(1.) Effects The float valve device of the present invention can have the following effects.

■ The valve body and valve seat are placed in the center of the float, making the device more compact.

■ The toggle mechanism using a lever and link increases the force pushing down the valve body when the valve is closed, allowing the float to be made smaller.

■ The float is placed inside the container and the water in the tank is introduced into the container through the bleed hole, which prevents the float from rising rapidly and causing the valve to close suddenly, thereby preventing the water hammer phenomenon. It can be prevented.

■ In the example, the stem is placed radially apart from the valve body and radially outside of the float, which prevents foreign matter from getting caught between the valve body and the valve seat and prevents leakage. It is possible to observe debris clogging from the top, allowing for early removal of debris.

■Since the stroke of the float is very large relative to the opening of the valve, the maximum water conveyor determined by the water line of the float and the height of the weir can be set with high precision.

■ Water can be supplied and stopped from the primary waterway simply by adjusting the height of the weir.

■By simply adjusting the height of the weir, it is no longer necessary to send more water than the maximum rainfall for each period, and it is possible to avoid uneven water distribution caused by ``too much water''.

■If the demand for water in the downstream area is low, the water level in the tank will rise, the float valve will close, and the water will eventually stop, contributing to water conservation without wasting water.

■It can be used as a pressure reducing device to temporarily release the pressure in the pipe channel to the atmosphere, and low-cost, low-pressure piping materials can be used.

[Brief explanation of the drawing]

1 ['m is a cross-sectional view of an embodiment of the float valve device for waterways according to the present invention, FIG. 2 is a diagram showing a substitute example of the float valve device of FIG. 1, and FIG. FIG. 71 is a cross-sectional view of a conventional float valve device (LF). l: Automatic pressure reducing device 2: Water tank 3: Inlet pipe 4: Outlet pipe 5: Valve seat 7: Guide pipe 8; Flow) 9: Outer cylinder 10: Bottom plate 11 Nib lead hole 12: Valve stem
14: Valve body 21 lever 22. 23: Link 25: Bottom
27.28: Chamber 26: Partition wall 30: Weir Figure 4 f

Claims (1)

[Scope of Claims] 1. A water tank with an inlet pipe and an outlet pipe connected to the lower part, a float provided in the water tank, and a water tank connected to the float that moves the inlet pipe in response to the vertical movement of the float. In a float valve device for a waterway, the water tank has a guide pipe extending vertically above the open end of the inlet pipe, and the axis thereof substantially coincides with the center of the open end. The float is arranged so as to be movable up and down around the guide tube, and is connected to one end of a lever provided at the upper part of the guide tube, and the valve body is connected to the open end of the inlet tube and the float. A waterway characterized in that the valve body is disposed between the lower end of the guide pipe and the valve body is attached to the lower end of a valve rod movably provided within the guide pipe, and the valve rod is connected to the other end of the lever. float valve device. 2. A water tank with an inlet pipe and an outlet pipe connected to the lower part, a float provided in the water tank, and an open end of the inlet pipe that is connected to the float and opens and closes according to the vertical movement of the float. A float valve device for a waterway equipped with a valve body, in which a guide tube extending vertically is arranged above the open end of the inlet pipe in the water tank so that its axis substantially coincides with the center of the open end, The float is arranged around the guide tube so as to be movable up and down and connected to one end of a lever provided at the upper part of the guide tube, and the valve body is connected between the open end of the inlet tube and the lower end of the guide tube. The valve body is attached to the lower end of a valve stem movably provided in the guide pipe, and the valve stem is connected to the other end of the lever, and the float is attached to the guide pipe together with the guide pipe. 1. A float valve device for a waterway, characterized in that a bottom plate and an outer cylinder are attached to define a container for accommodating the waterway, and a bleed hole is formed in the lower part of the outer cylinder. 3. A water tank with an inlet pipe and an outlet pipe connected to the lower part, a float provided in the water tank, and an open end of the inlet pipe that is connected to the float and opens and closes according to the vertical movement of the float. A float valve device for a waterway equipped with a valve body, in which a guide tube extending vertically is arranged above the open end of the inlet pipe in the water tank so that its axis substantially coincides with the center of the open end, The float is disposed around the guide tube so as to be movable up and down and connected to one end of a lever provided at the upper part of the guide tube, and the valve body is connected between the open end of the inlet tube and the lower end of the guide tube. The valve body is attached to the lower end of a valve stem movably provided in the guide pipe, and the valve stem is connected to the other end of the lever, and the bottom of the water tank has an opening of the inlet pipe. A float valve device for a waterway, characterized in that a partition wall extending upward is provided between the end and the open end of the outlet pipe, and a weir is provided adjacent to the partition wall so as to be movable up and down.