JPH0792081B2 - Horizontal bladder type accumulator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accumulator used for accumulating and buffering a pressure liquid, and more specifically, eccentricizing a valve element with respect to a central axis of a container to improve volume efficiency. The present invention relates to a significantly increased horizontal bladder type accumulator.

2. Description of the Related Art In a conventional horizontal bladder type accumulator, as shown in FIG. 7, a bladder 2 is concentrically arranged in a cylindrical container main body 1,
A liquid inlet / outlet is formed at one end of the container main body 1 on the side of the bladder bottom 3, a valve body 5 is arranged concentrically with the container main body 1 at the liquid inlet / outlet, and The bladder 2 is deformed by the pressure to accumulate and buffer the pressure liquid. (See JP-A-48-30414) Problems to be Solved by the Invention When a conventional bladder type accumulator is used in a horizontal position as shown in FIG. 7, as described above, the container main body 1, the bladder 2 and the valve are used. Since each central axis of the body 5 is located on the same straight line 6,
The following problems occur.

(1) When the liquid in the container main body 1 is discharged from the fluid inlet / outlet 4, the bladder 2 is deformed to the state of 2b by the action of buoyancy, and the valve body 5 is pressed by the bladder bottom portion 3 to The fluid inlet / outlet 4 is closed before all the liquid is discharged.

Therefore, a large amount of liquid remains in the cylindrical container main body 1 and the amount of discharged liquid decreases, so that the volumetric efficiency decreases.

(2) When the liquid is supplied into the container main body 1, the bladder 2 is used.
Is deformed to the state of 2a by the action of buoyancy, so that the valve body 5 is pressed by the bladder bottom portion 3 and cannot be sufficiently opened, resulting in a large pressure loss.

It is an object of the present invention to provide an accumulator with good volumetric efficiency, which can prevent the volumetric effect from being reduced and can reliably open and close the valve element even when placed horizontally.

Means for Solving the Problems The present invention relates to a cylindrical container main body arranged horizontally, a bladder arranged concentrically in the container main body and having an opening and a bottom, A lid provided at one end of the container main body for closing and holding the opening of the bladder, and a fluid inlet / outlet provided at the other end of the container main body and facing the bottom of the bladder,
A horizontal bladder type accumulator having a valve body slidably disposed at the fluid inlet / outlet, wherein a central axis of the valve body is located below a central axis of the cylindrical container main body. A horizontal bladder type accumulator characterized in that the above object is achieved.

Operation If the cylindrical container main body is laid horizontally so that the central axis of the valve body is located below the central axis of the cylindrical container main body, the bladder filled with gas corresponding to the fluid pressure will be buoyant and It is offset to the lower side of the main body, the central part thereof is constricted, and the whole is located above the central axis of the cylindrical container main body.

Next, when the bladder expands and the liquid in the container main body begins to be discharged, the bladder bottom (supply / discharge side) moves in the axial direction to approach the valve body and presses the valve body, but The valve remains open until almost all the liquid is discharged, and the valve is closed when almost all the liquid remains.

Also, the bladder receives buoyancy force due to the liquid flowing in from the valve body, and the bladder bottom part contracts while moving in the axial direction of the gas supply part, and if it is separated from the contact with the valve body, the valve body opens sufficiently. Then, predetermined liquid storage is performed.

Embodiment An embodiment of the present invention will be described with reference to the accompanying drawings, and the same reference numerals have the same names and functions.

FIG. 1 and FIG. 2 show the first embodiment, in which 11 is a cylindrical container main body made of a rigid material such as metal in a sausage shape, and the inside thereof is made of an elastic material such as rubber. By the bladder 12 formed to be expandable and contractible, the gas supply unit 13
And a liquid chamber B communicating with the fluid inlet / outlet port 14.

The center axis of the bladder 12 is on the center axis 11c of the container main body 11, and both are concentric.

The fluid inlet / outlet port 14 is formed on the bottom portion 15 side of the container main body 11, its center axis 14c is eccentric with respect to the center axis 11c of the container main body 11, and both center axes 11c and 14c are parallel to each other.

A valve body 16 is concentrically arranged in the fluid inlet / outlet port 14, and the valve element 16 is brought into contact with or separated from a valve seat 17 formed at an inner end of the fluid inlet / outlet port 14 to open / close the liquid inlet / outlet port 14. The valve shaft 18 of this valve body is fitted to a bearing 20 supported at the center of the fluid inlet / outlet port 14 by an arm 19, and a valve opening 18 is provided between the valve body 16 of the valve shaft 18 and the arm 19. The spring 21 is interposed.

Reference numeral 22 denotes a dashpot attached to the lower end of the valve shaft 18 such that the valve body 16 is tightly fitted in the receiving hole 23 provided in the bearing 20 when the valve body 16 is closed. When attempting to raise it, the pressure in the receiving hole 23 becomes lower than the pressure in the fluid inlet / outlet port 14 to control the lowering of the valve shaft 18 to decelerate the closing of the valve.

A cushion cup 24 is attached to the valve body 16 so as to correspond to the bladder bottom portion 15. The cushion cup 24 is made of an elastic material such as rubber.
When the valve 16 and the valve seat 17 are covered with the blockage of the valve 16, the bladder 12 is elastically supported.

Next, the case where the liquid is accumulated in the accumulator AC will be described.

With the cylindrical container main body 11 placed horizontally, the central axis 14c of the valve body 16
Is positioned below the central axis 11c of the container main body 11, and then gas is supplied from the gas supply unit 13 into the bladder 12 to bring the inside of the bladder 12 to a predetermined pressure.

Then, when the liquid is caused to flow into the container main body 11 through the fluid inlet / outlet port 14, the bladder 12 is compressed by the liquid pressure and is biased to the upper side of the container main body 11 by the action of the buoyancy, while the central portion is constricted 12a to 12d. It transforms to the state of.

At this time, the bladder bottom 15 has the cushion cup 24 and the valve body
Although close to the valve body 16, the valve body 16 is eccentric with respect to the central axis 11c of the container body 11, so that the bladder bottom portion 15 continues to separate from the valve body 16 and there is no resistance between them.

Therefore, the valve body 16 opens immediately until the predetermined opening degree is obtained with the start of the inflow of the liquid, and the liquid is supplied, so that quick accumulation is performed and the pressure of the pipeline system is applied to the bladder 12. The bladder 12 can be effectively acted to effectively perform the buffering action.

Further, the case where the liquid is discharged from the accumulator AC will be described.

When the bladder 12 expands due to the decrease in hydraulic pressure, the bladder 12 is shown in FIG.
It transforms from 12d to 12e through 12c, 12b and 12a, reducing the constriction in the center and making the bladder bottom 15 a cushion cup.
Abut on 24.

At this time, since the valve body 16 is eccentric with respect to the central axis 11c of the container body 11, until the liquid in the container body 11 is almost discharged,
The pressing of the bladder bottom 15 does not close the valve body 16.

Then, when the liquid in the container main body 11 is almost discharged, the bladder bottom portion 15 strongly presses the valve body 16 so that the valve body 16 is seated on the valve seat 17 and the valve is closed.

At this time, the bladder 12 is in the state shown in FIG. 2f, the residual liquid F becomes an extremely small amount, and the liquid in the container main body 11 is almost completely discharged.

FIG. 3 is a diagram showing a second embodiment, in which the central axis of the fluid inlet / outlet port 14
14c is provided so as to be inclined with respect to the center axis 11c of the main body of the container, and a valve body 16 having a concentric axis is provided at the fluid inlet / outlet port 14.

The inclination angle θ is, for example, 20 degrees.

In the second embodiment, even if the bladder 12 is deformed by the change of the hydraulic pressure and the bladder bottom portion 15 presses the valve body 16, the valve body 16 is not subjected to the eccentric load and the vertical load, that is, the valve body 16 is not applied. The load is only applied in the direction of the central axis of.

Therefore, the valve body 16 can be opened and closed quickly and reliably, and the valve body 16 can be prevented from being damaged.

FIG. 4 is a view showing a third embodiment. The difference from the second embodiment is that the outer end portion 14a of the fluid inlet / outlet 14 is the central axis 1 of the container main body 11.
It is formed in parallel with 1c. In the third embodiment, since the outer end portion 14a of the fluid inlet / outlet port 14 is straight, the piping work can be easily performed.

FIG. 5 is a view showing a fourth embodiment, in which the inner surface K of the end of the container main body 11 on the side of the bladder bottom 15 is formed in a substantially arcuate shape with the fluid inlet / outlet 14 interposed therebetween. It is asymmetric.

FIG. 6 is a view showing a fifth embodiment, in which the lid portion 25 of the container main body 11 is shown.
An air passage 26 communicating with the liquid chamber B is formed in the air passage 26, and an air vent valve 27 is arranged in the air passage 26.

By opening and closing the air bleeding valve 27, the liquid chamber B
Since the gas mixed in the liquid can be discharged to the outside of the liquid chamber, the accumulator becomes more efficient.

As described above, according to the present invention, since the central axis of the valve body is located below that of the cylindrical container main body, the bladder receives buoyancy due to the hydraulic pressure in the liquid chamber and is deformed upward. However, the valve body is not closed by pressing the bottom of the bladder until the liquid in the liquid chamber is almost discharged.

Then, when the liquid in the container main body is almost discharged, the bladder bottom portion strongly presses the valve body to seat the valve body on the valve seat and close the valve. Therefore, the liquid is almost completely discharged from the container main body and almost no residual liquid is generated.

Therefore, the effective utilization amount of the liquid is increased, so that the volumetric efficiency can be improved.

In addition, when the liquid flows into the container body, the valve body moves quickly,
Since the opening is large, it is possible to sensitively respond to pressure fluctuations in the pipeline system.

Therefore, it is possible to significantly improve the cushioning performance and prevent pressure loss.

[Brief description of drawings]

1 and 2 are views showing a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view showing a state in which a valve body is open, and FIG. 2 is a state in which the valve body is closed. FIG. 3 is a longitudinal sectional view of an essential part showing a second embodiment, FIG. 4 is a longitudinal sectional view of an essential part showing a third embodiment, and FIG. 5 is a fourth embodiment. FIG. 6 is a longitudinal sectional view of an essential part showing an example, FIG. 6 is a longitudinal sectional view of an essential part showing a fifth embodiment, and FIG. 7 is a longitudinal sectional view of an essential part showing a conventional example. 11 …… Mainly cylindrical container 12 …… Bladder 14 …… Fluid port 15 …… Bladder bottom 16 …… Valve body

Claims (2)

[Claims] 1. A cylindrical container main body arranged in a horizontal state,
A bladder concentrically arranged in the container main body, the bladder having an opening and a bottom, a lid provided at one end of the container main body for closing and holding the opening of the bladder, and the other of the container main body. A horizontal bladder type accumulator having a fluid inlet / outlet provided at an end and facing a bottom portion of the bladder, and a valve body slidably arranged at the fluid inlet / outlet, wherein a central axis of the valve body Is located below the central axis of the cylindrical container main body, and is a horizontal bladder type accumulator. 2. The horizontal bladder type accumulator according to claim 1, wherein the central axis of the valve body is inclined.