JPH0112002Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an accumulator that prevents damage to the bladder. More specifically, the present invention relates to an accumulator that effectively prevents the bladder from being pressed against a hole on the valve side due to the applied pressure and being damaged.

As a prior art related to the present invention, there is the one shown in FIG. 1 (Japanese Patent Publication No. 50-39483). FIG. 1 is a cross-sectional view of the accumulator, showing the shell 50.
Inside is a gas chamber 52 and a liquid chamber 53 by a bladder 51.
It is divided into. Since a supply valve 54 for supplying compressed gas to the gas chamber 52 is provided in the shell 50 on the side of the gas chamber 52, a supply port 55 communicating with the gas chamber 52 from the supply valve 54 is perpendicular to the inner peripheral surface of the shell. It is open to During operation, the working pressure on the liquid chamber 53 side may act abnormally on the bladder 51 and press the bladder 51 against the supply port 55. At this time, the membrane portion of the bladder 51 may enter the supply port 55 and be pressed against the ridge forming the supply port 55, causing damage. As another prior art, as shown in Japanese Patent Publication No. 57-44841, there is a disc made of rubber material that is attached to cover the supply port 55, but since this disc is made of rubber material, , must be baked and glued to shell 50,
There is a drawback that the baking adhesion cannot be reliably obtained. In particular, when pressurized gas is supplied, the disk is pressed by the gas pressure, causing a problem of peeling off.

The present invention has been developed in view of the above-mentioned problems, and the technical problem of the present invention is to prevent the bladder from being damaged by the gas supply port provided in the shell. Therefore, technical means for solving the above technical problem are configured as follows.

In other words, the shell has a vacant chamber, a supply port for supplying fluid into the vacant chamber, and a locking recess formed on the vacant chamber side of the supply port, and a gas chamber with the vacant chamber in the shell on the supply port side. a bladder that is divided so that there is a plate-shaped portion large enough to cover the supply port, and a protrusion that protrudes from one side of the plate-shaped portion and elastically locks with the recess of the locking recess. The protector is provided with a locking protrusion having a locking convex portion, and a passage communicating from the supply port to the gas chamber is provided between the joint surface of the shell and the plate-like portion of the protector.

The technical means of the present invention configured as described above has the following effects.

When the protector 10 is attached to the shell 1, it covers the supply port 6 and the plate-shaped portion 11 of the protector 10.
Since the supply port 6 is not provided at right angles to the surface on the gas chamber 4 side, the bladder 3 is not damaged by the supply port 6. Moreover, since the protector 10 is configured to be engaged and fixed with the shell by simply being press-fitted, its installation is extremely simple, and the annular groove 8 and annular protrusion 12 of both are engaged and attached to the shell 1. Protector 10 is attached. As a result, the protector 10 will not fall off due to the pressurized gas. Moreover, since the pressure gas flows from the supply port 6 through the passage 16 and along the inner peripheral surface of the shell 1, dust contained in the pressure gas does not directly collide with the bladder 3 and damage the bladder 3. can be expected to prevent this.

The unique effects produced by the present invention are as follows.

It is a known technique that the supply port 55 for supplying gas into the shell 50 is open toward the center of the shell 50 (Japanese Patent Publication No. 50-39483, Japanese Patent Publication No. 57-44841). In such a configuration, when dust, etc. present in the gas, or scale, etc. in the gas storage container are forced into the shell 50 together with the gas from the supply port 55, the bladder 5
1, causing small damage to the bladder 51, which significantly reduces the durability of the bladder 51.

However, in the present invention, a passage 16, which is an outlet for gas into the shell 1, is provided between the joint surface of the shell 1 and the protector 10, and the gas is configured to flow along the inner surface of the shell 1 when it is pumped. Therefore, even if the dust contained in the gas hits the inner peripheral surface of the shell 1, it does not come into direct contact with the bladder 3, which effectively prevents damage to the bladder 3 and maintains the durability of the bladder 3. can do.

In addition, there is a device in which the supply port is covered with a disc made of rubber material (Japanese Patent Publication No. 57-44841), but the adhesion between the shell and the disc is not reliable, and high-pressure gas is forced into the shell. When this occurs, a problem arises in which the disc separates from the shell 1. However, in the present invention, for example, the annular groove 8 of the locking recess 9 and the locking protrusion 15
For example, the annular protrusion 12 is securely engaged with the protector 1 from the shell 1 during gas pressure feeding.
0 does not come off, and the protector 10 is extremely easy to attach.

Hereinafter, one embodiment of the present invention will be explained in detail. FIG. 2 is a sectional view of the present invention. It has a shell 1 in which two hemispherical parts are engaged and fixed from both sides to form a cavity 2 inside.The outer peripheral end side of the bladder 3 is held in the engaging part of this shell 1, and the inside of the shell 1 is is divided into a gas chamber 4 and a liquid chamber 5 by a bladder 3. A supply port 6 for supplying pressurized gas is provided in the shell 1 on the side of the gas chamber 4, and a check valve 7 for gas sealing is installed on the outside of the supply port 6. Further, a locking recess 9 having an annular groove 8 surrounding the supply port 6 is formed on the gas chamber side surface of the shell 1 . A protector 10 is provided which engages and secures the locking recess 9 to cover the supply port 6 of the shell 1. This protector 10 consists of a disk-shaped plate portion 11 and a cylindrical locking convex portion 15 that is shaped to fit into the locking recess 9 on the side surface of the plate portion 11. Further, the locking convex portion 15 is provided with an annular projection 12 that locks with the annular groove 8 at its free end, and four equally spaced groove portions 13. The engagement between the engagement recess 9 and the engagement protrusion 15 is achieved by the elastic deformation function of the engagement protrusion 15 in the inner diameter direction due to the provision of the groove 13.
The annular protrusion 12 is elastically deformed in the inner radial direction and press-fitted into the locking recess 9 , reaches the annular groove 8 , the locking protrusion 15 becomes multiple, and the annular protrusion 12 engages with the annular groove 8 .

These two locking methods do not involve providing the annular groove 8 and the annular protrusion 12, but instead provide holes at corresponding positions of the locking recess 9 and the locking protrusion 15, and a ball pressed by a spring is inserted into the hole on one side. The fitting surface of the locking recess 9 and the locking protrusion 15 may be locked via a ball. In addition to this, a locking means using elastic force can be easily considered based on the above-mentioned concept.

Further, when the protector 10 is attached to the shell 1, the edge angle of the plate-shaped portion 11 facing the gas chamber 4 side is chamfered. This is because the bladder 3 is in contact with the bladder 3.
This is to prevent any damage that may occur.

Furthermore, the groove portion 13 provided in the locking convex portion 15 is
During processing, it reaches the plate-shaped part 11 and
A passage 16 with a depth of about 0.3 mm is formed. This passage 16 becomes a passage through which gas passes into the shell 1 from the supply port 6 when the plate-shaped portion 11 and the shell 1 come into contact with each other. The passage 16 may be provided in the shell 1 without being provided in the plate-like portion 11, or may be provided in both. The width of this passage may be set appropriately, but the depth is preferably about 0.3 mm. By doing so, large dust particles and the like can be effectively prevented from being sent into the shell along with the gas.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional accumulator, Figure 2 is a sectional view of a conventional accumulator.
The figure is a cross-sectional view of the accumulator of the present invention, and FIG. 3 is a cross-sectional view of the protector of the present invention. 1... Ciel, 2... Vacant room, 3... Blada, 4
...Gas chamber, 5...Liquid chamber, 6...Supply port, 7...
... Check valve, 8 ... Annular groove, 9 ... Locking recess, 10
... protector, 11 ... plate-shaped portion, 12 ... annular projection, 13 ... groove, 15 ... locking convex portion, 16 ...
...Aisle, 50...Ciel, 51...Blada, 52
...gas chamber, 53...liquid chamber, 54...supply valve,
55... Supply port.

Claims (1)

[Scope of utility model registration request] A shell 1 having a cavity 2, a supply port 6 for supplying fluid into the cavity 2, and a locking recess 9 formed on the cavity 2 side of the supply port 6 and provided with a recess 8; 1, a bladder 3 that divides a vacant space 2 in the interior so that a gas chamber 4 exists on the side of the supply port 6; a plate-shaped portion 11 having a size that covers the supply port 6; and one of the plate-shaped portions 11. A protector 10 is provided with a locking protrusion 15 having a recess 8 of the locking recess 9 and a projection 15 for elastic locking on the side protruding from the side surface, and a plate of the shell 1 and the protector 10 is provided. The accumulator is provided with a passage 16 communicating from the supply port 6 to the gas chamber 4 between the joint surfaces with the shaped portion 11.