JPH0932801A - Diaphragm supporting device for accumulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a diaphragm flange lower part from being damaged by mounting the flange of a diaphragm on a supporting ring, and tilting the opposite side of the mounting surface of the supporting ring so as to form an obtuse angle to a container body. SOLUTION: The outer end of the supporting ring 10 of a diaphragm 8 is formed so as to meet the inner periphery of a container body 1, and a cut part 11 is formed at a part of its upper side. At this part, an elastic layer 12 for sealing a clearance between the supporting ring 10 and the inner periphery of the container body 1 brought into contact is provided, and the lower surface is provided at an inclined surface so as to form an obtuse angle to a container body 1. The supporting ring 10 is fitted in the container body 11 until it is locked at a step part 4, and the diaphragm 8 is fitted in the container body 1. A flange 9 is mounted on the supporting ring 10, and a cover 6 is screwed in the opening of the container body 1. The flange 9 of the diaphragm 8 is clamped from four sides at the hook type retaining end 7 of the cover 6 and the inner periphery of the container body 1, so it is possible to eliminate damage to a flange lower part resulting from repeated deformation of the diaphragm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm support device for an accumulator. For more details, it is easy to use the accumulator as a container.
The present invention relates to a diaphragm support device that supports a diaphragm at low cost and effectively prevents damage to the flange of the diaphragm and the lower portion of the flange.

[0002]

2. Description of the Related Art A support ring having an inner edge formed in an arc shape and an outer edge formed in a straight line and having an elastic layer attached to the outer edge side is fitted into a groove provided on the outer circumferential side of a flange of a diaphragm to form a container. The diaphragm supporting device of the accumulator, which is fitted into the stepped portion provided inside the main body until it is locked and the gap between the supporting ring and the main body of the container is closed by the elastic layer, is the prior application of the present inventors. No. 3-81402, the elastic layer of the support ring seals the gap between the support ring and the container main body, and prevents the flange of the diaphragm from entering and leaving the gap. It was effective. However, when the groove 15 is provided on the outer peripheral side of the flange 14 of the diaphragm 13 and the support ring 17 provided with the elastic layer 16 is engaged with the groove 15 as described above, the diaphragm 15 is attached before being attached to the container main body 18. The lower side of the flange 14 of 13 is closely attached to the support ring 17 as shown in FIG. 5, but the septum 13 is inserted into the container main body 1 until the support ring 17 is locked to the step portion 19, and the lid is closed. When pressure is applied by tightening the body 20, the flange 14
Protrudes downward and creates a space 21 between the lower surface of the groove 15 and the lower surface of the support ring 17. If nitrogen gas or the like is filled in the diaphragm 13 with the space 21 formed, the space 21 is pushed in, and the lower side of the flange 14 is deformed to cause extreme bending as shown in FIG. . When the liquid enters and leaves the container body 1, the deformed portion repeatedly expands and contracts up and down, which causes a new problem that the portion under the flange of the diaphragm 13 is damaged.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of this situation. The present invention is modified so that the flange of the diaphragm is mounted on the support ring, and the side of the support ring opposite to the surface on which the flange is mounted. Is provided so as to form an obtuse angle with the main body of the container to allow the diaphragm to be deformed without being extremely bent, and to provide a diaphragm supporting device for an accumulator in which the above-mentioned conventional problems are solved.

[0004]

In order to solve the above problems, a diaphragm supporting device for an accumulator according to the present invention comprises a container main body, a diaphragm contained in the container main body, and a step provided on the container main body. An accumulator having a support ring that is locked to support the flange of the diaphragm, and an elastic layer that is provided on the outer peripheral side of the support ring and seals the gap between the support ring and the container main body. The flange is mounted on the support ring, and the opposite side of the support ring from the flange mounting surface is inclined so as to form an obtuse angle with the inner peripheral surface of the container main body.

[0005]

In the diaphragm supporting device for the accumulator according to the present invention having the above-mentioned structure, when the supporting ring is locked to the stepped portion provided in the container main body and the diaphragm is loaded into the container main body, the flange of the diaphragm is opened. Since it is mounted on the support ring as shown in 2, when the lid member is fastened to the container main body and the flange of the diaphragm is pressed in this state, even if the flange protrudes, the portion below the flange does not There is no change as shown in FIG. Therefore, when nitrogen gas or the like is enclosed in the diaphragm to expand the diaphragm, the portion under the flange is pressed against the corner portion composed of the container main body and the support ring. Since it is formed at an obtuse angle and bends under the flange are restricted to a comfortable state, the part under the flange will not be damaged even if the deformation of the diaphragm is repeated by the inflow and outflow of the liquid into the container main body. The diaphragm can be reliably operated for a long period of time without failure.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a diaphragm supporting device for an accumulator according to the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional front view showing an embodiment of a diaphragm supporting device for an accumulator according to the present invention, and FIG. 2 is a partial sectional view showing a state in which a diaphragm is inserted into a container main body of the same embodiment.
FIG. 3 is a partial cross-sectional view showing a state in which a lid member is fastened to the container main body of the above-mentioned embodiment and a diaphragm is attached, and FIG. 4 is a portion under the flange of the diaphragm attached to the container main body of the above-mentioned embodiment. FIG. 5 is a partial cross-sectional view showing a state of being deformed by encapsulation such as FIG.
FIG. 6 is a partial cross-sectional view showing a state where a container main body of a conventional diaphragm support device is loaded with a diaphragm, and FIG. 6 is a partial cross-sectional view showing a state where a lid member is fastened to a container main body of the same conventional device with a diaphragm attached,
FIG. 7 is a partial cross-sectional view showing a state in which the portion under the flange of the diaphragm attached to the container body of the conventional apparatus is deformed by enclosing nitrogen gas or the like.

In FIG. 1, reference numeral 1 indicates a main body of a cylindrical container in an accumulator, and a bottom body 3 having a liquid supply / discharge port 2 is screwed and fixed to the lower end of the accumulator to fix the inner peripheral surface. A step portion 4 for locking a support ring, which will be described later, is provided on the upper portion, and a lid body 6 having a gas sealing valve 5 is detachably screwed on the upper end,
On the lower side of the lid body 6, there is provided a hook-shaped restraining edge 7 which enters the inside of a diaphragm described later and sandwiches the flange with the container main body 1.

In FIG. 1, reference numeral 8 is the container main body 1 described above.
2 shows a diaphragm which is housed inside and divides and forms an internal gas chamber a and an external liquid chamber b. The diaphragm 8 is made of natural or synthetic rubber, and its upper end is shown in FIGS. As shown in the enlarged view of FIG. 4, a flange 9 is mounted around a support ring, which will be described later.

1 to 4, reference numeral 10 indicates the diaphragm 8
The outer ring side is formed so as to match the inner circumference of the container main body 1, and a notch 11 is provided in a part of the upper side thereof to the inner peripheral surface of the container main body 1. An elastic layer 12 is attached which abuts and seals a gap formed between this portion and the support ring 10. The inner edge side is formed in an arc shape so as not to damage the diaphragm 8, and the support ring 10 is formed. After being fitted into the container main body 1 until it is locked by the step portion 4, the diaphragm 8 is inserted into the container main body 1 and the flange 9 thereof is mounted on the support ring 10 to open the container main body 1. When the lid body 6 is screwed, the flange 9 of the diaphragm 8 is sandwiched between the hook-shaped restraining edge 7 of the lid body 6 and the inner peripheral surface of the container main body 1 from four sides, so that the airtightness is high and strong. The diaphragm 8 is attached to the container main body 1.

[0011]

As described above, in the diaphragm supporting device for the accumulator according to the present invention, the elastic layer is formed on the outer peripheral side of the supporting ring, and the elastic layer seals the gap between the supporting ring and the container main body. , Not only is it possible to prevent damage to the flange due to the flange moving in and out of this gap due to pressure fluctuations, but also to mount the diaphragm flange on the support ring so that the side opposite to the mounting surface of the support ring is mounted. Since it is inclined so as to form an obtuse angle with the inner peripheral surface of the container main body, when the lid is fastened to the container main body, the portion under the flange maintains the original shape even if the flange is pressed by the lid, Even if the portion under the flange is pressed against the corner formed by the container main body and the support ring due to the encapsulation, it bends at an obtuse angle and no unreasonable deformation occurs.
Therefore, even if the liquid flows in and out of the container main body 1 and the deformation of the diaphragm is repeated, the portion under the flange is not damaged, which greatly contributes to the extension of the life of the diaphragm.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a diaphragm supporting device for an accumulator according to the present invention.

FIG. 2 is a partial cross-sectional view showing a state in which a diaphragm is inserted into the container main body in the above embodiment.

FIG. 3 is a partial cross-sectional view showing a state in which a lid member is fastened to a container main body and a diaphragm is attached in the above embodiment.

FIG. 4 is a partial cross-sectional view showing a state in which the portion under the flange of the diaphragm attached to the container main body is deformed by enclosing nitrogen gas or the like in the above embodiment.

FIG. 5 is a partial cross-sectional view showing a state in which a diaphragm is loaded into a container main body in a conventional diaphragm support device for an accumulator.

FIG. 6 is a partial cross-sectional view showing a state in which a lid member is fastened to a container body and a diaphragm is attached in the conventional apparatus of the above.

FIG. 7 is a partial cross-sectional view showing a state in which the portion under the flange of the diaphragm attached to the container main body is deformed by enclosing nitrogen gas or the like in the above conventional apparatus.

[Explanation of symbols]

 1 Container Main Body 4 Steps 8 Diaphragm 9 Flange 10 Support Ring 12 Elastic Layer

Claims (1)

[Claims] 1. A container main body, a diaphragm housed in the container main body, a support ring for supporting a flange of the diaphragm by being locked to a step provided on the container main body, and an outer peripheral edge of the support ring. In an accumulator having an elastic layer provided on the side to seal the gap between the support ring and the container main body,
The flange of the diaphragm is mounted on the support ring, and the opposite side of the support ring from the flange mounting surface is inclined so as to form an obtuse angle with the inner peripheral surface of the container main body. Diaphragm support device for accumulator.