JPH0342242Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a device for protecting a cushion cup formed of an elastic material such as rubber of an accumulator used for accumulating or buffering pressurized liquid. More specifically, the present invention relates to a device that prevents damage to a cushion cup caused by the step by providing a compensation portion on an extension of the valve seat to compensate for the step formed by the valve body.

Conventionally, an accumulator is known in which a cushion cup is attached to a valve body for opening and closing a liquid supply/discharge port, and as shown in FIGS. A liquid supply/discharge port c is provided at the end of the container body b which has a liquid supply/discharge port c provided inside the container body b.
A valve seat d is provided in the part facing inward, and the liquid supply/discharge port c
A valve shaft f supported by an arm e is provided at the center of the valve shaft f, and when the upper end of the valve shaft f is pressurized by the bladder a, it contacts the valve seat d and closes as shown in FIG. When the bladder a separates, the force of the spring g mounted on the valve stem f causes the valve body h to separate from the valve seat and open the valve, as shown in Figure 5.
A cushion cup i is provided on the surface of the valve body h, which expands as shown in FIG. 6 when pressurized by the bladder a and covers the extension d' of the valve seat d. When the valve body h contacts the valve seat d and closes the valve, the periphery of the valve body h forms a step j as shown in FIG. 6 on the extension of the valve seat d.

Therefore, an accumulator is used for buffering, etc., and its bladder a maintains an expanded state for a long period of time, pressurizes the cushion cup and the valve body h, closes the valve body h, and extends the valve seat d by the cushion cup i.
If we continue to keep d' covered, the fifth
The part of the cushion cup i, which maintains its original shape as shown in the figure, which comes into contact with the stepped part j, is deformed as shown in FIG. 7 and receives a shearing force, which causes the problem that the cushion cup is damaged and cannot perform its function. Ta.

Therefore, the protection device for a cushion cup for an accumulator according to the present invention can prevent damage to the cushion cup by using a compensation portion to compensate for the stepped portion formed on the extension of the valve seat.

Therefore, the technical means of this device consists of a container main body with a bladder inside, a liquid supply/discharge port provided at an end of the container main body with a valve seat in a part facing into the container main body, and a liquid supply/discharge port provided in the bladder. When pressurized, the valve body contacts the valve seat and closes, and when the bladder leaves, the valve opens due to a spring.The valve body is attached to the surface of the valve body and expands when the bladder is pressurized, and A cushion cup that covers an extension of the valve seat, and a compensation part provided on the back side of the cushion cup or on the extension of the valve seat so as to compensate for the stepped part formed by the valve body. It is something.

Therefore, since the accumulator is used as a buffer in this device, even if the bladder remains inflated for a long period of time, closing the valve body and keeping the cushion cup over the extension of the valve seat, the valve seat The compensation portion compensates for the stepped portion formed by the valve seat on the extension, making the state substantially the same as if there were no stepped portion. Therefore, the cushion cup is supported evenly on its back side and is not subjected to shearing forces. Therefore, the cushion cup retains its original shape and is not damaged by deformation.

Next, an example of a device related to the present invention will be explained based on the drawings.

In FIGS. 1 and 2, a container 1 is mainly made of a rigid material such as steel, and a bladder 2 made of an elastic material such as rubber is housed inside the container.

Reference numeral 3 denotes a liquid supply/discharge port provided at the end of the container main body 1, a valve seat 4 is provided in the part facing into the container main body 1, and a bearing 6 supported by an arm 5 is fitted in the center so as to be able to rise and fall. A matching valve stem 7 is provided.

Reference numeral 8 denotes a valve body provided at the upper end of the valve shaft 7. When the bladder 2 expands and presses the valve body 8, it contacts the valve seat 4 and closes as shown in FIG. When the valve body 8 separates from the valve body 8, the valve body 8 and the arm 5
As shown in FIG. 1, a spring 9 externally mounted on the valve shaft 7 pushes the valve away from the valve seat 4 to open the valve.

Reference numeral 10 denotes a dowel pot attached to the lower end of the valve shaft 7, which, when the valve is opened, fits into the receiving hole 11 provided at the lower part of the bearing 6 as shown in FIG. 1 to trap the liquid.
It functions to suppress sudden opening of the valve body 8.

Reference numeral 12 denotes a cushion cup attached to the surface of the valve body 8, which is formed into a bowl shape from an elastic material such as rubber, and when pressed by the bladder 2, expands as shown in FIG. It covers the extension 4' of the bladder 2 and elastically supports the bladder 2, but when the bladder 2 is separated, the elasticity causes it to return to its original state as shown in FIG.

Reference numeral 13 denotes a closed valve body 8 on the back side of the cushion cup 12, and a second valve body 8 on the extension 4' of the valve seat 4.
When the cushion cup 12 covers the extension 4' of the valve seat 4, it compensates for the step part 14 and applies shearing force to the cushion cup 12 by the complementary part of the step part 14 formed in accordance with the step part 14 formed as shown in the figure. This prevents deformation and damage from occurring.

In this embodiment, the expansion of the bladder 2 presses the valve body 8 together with the cushion cup 12 to close the valve as shown in FIG. 2, and a stepped portion 14 is formed on the extension 4' of the valve seat 4. Also, a supplementary part 13 for the stepped portion 14 is provided on the back side of the cushion cup 12 to compensate for the stepped portion 14, and the cushion cup 12 is not affected by the stepped portion 14, so that the bladder 2 remains in an inflated state for several months. Even if you keep pressing cushion cup 12, cushion cup 1
2. No deformation or damage occurs.

3 and 4 of the drawings show another embodiment, in which when the valve body 8 contacts the valve seat 4 and closes as shown in FIG. Stepped portion 14
The embodiment differs from the embodiment shown in FIGS. 1 and 2 in that the compensation portion 13' is provided on the extension 4' of the valve seat 4, but the other configuration is different from that in the first embodiment.
This is the same as the embodiment shown in FIGS.

In this embodiment, when the valve body 8 closes as shown in FIG. 4 due to expansion of the bladder 2 and comes into contact with the valve seat 4, a compensating portion 13' provided on the extension 4' of the valve body 8 and the valve seat 4. are aligned as shown in Figure 4, and the cushion cup 1
Since each part of the cushion cup 12 is evenly supported and the step part 14 does not affect it, the cushion 12 will not be deformed or damaged even if the bladder 2 remains inflated for several months and continues to press the cushion cup 12. I have nothing to do.

In the device of the present invention, even if the bladder continues to expand for a long period of time and the valve body remains closed, no shearing force is applied to the cushion cup, so the cushion cup retains its original shape without being deformed or damaged. It has a unique effect that continues to fulfill the functions of the period.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an example of the implementation of the device related to the present invention. FIG. 2 is a partially enlarged longitudinal sectional side view showing the cushion cup in a protected state. FIG. 3 is a longitudinal sectional front view showing another example of implementation. FIG. 4 is a partially enlarged vertical sectional side view showing the cushion cup in a protected state. FIG. 5 is a longitudinal sectional front view showing a conventional device. FIG. 6 is a partially enlarged longitudinal sectional front view showing a deformed state of the cushion cup. FIG. 7 is a partially enlarged longitudinal sectional front view showing the deformed state of the same as above. In the figure, 1 is the main body of the container, 2 is a bladder, 3 is a liquid supply/discharge port, 4 is a valve seat, 8 is a valve body, 9 is a spring, 12 is a cushion cup, and 13 and 13' are supplementary parts for the stepped portion 14.

Claims (1)

[Scope of utility model registration request] A container main body with a bladder inside, a liquid supply/discharge port provided at an end of the container main body, and when the bladder is pressurized, the valve contacts the valve seat of the supply/discharge port and closes, and the bladder separates. a valve body that is opened by a spring; a cushion cup that is attached to the surface of the valve body and covers an extension of the valve seat when the bladder is pressurized; and a back side of the cushion cup or the valve body; 1. A protection device for a cushion cup for an accumulator, characterized in that a compensating part is provided on an extension of the seat so as to compensate for the stepped part formed by the valve body.