JPH07239035A - Gasket - Google Patents

Abstract

PURPOSE:To restrain O rings from moving in the direction of their bores so as to prevent the O rings from falling by boring a hole that communicates passages formed in both members, forming protrusions at predetermined intervals along the overall periphery of the inner surface of the hole, and mounting the O rings on the outside of the protrusions curved. CONSTITUTION:A gasket 1 has protrusions 6 provided at predetermined intervals on the circumference of the edge of a hole bored in a portion corresponding to a passage 8 that communicates two members 10, 11 with each other. The protrusions 6 are alternately curved in the direction of fluid in the passage 8, and O rings 14, 15 are installed in respective vacant spaces 12, 13 formed outside the curved protrusions 6. The O rings 14, 15 are held within the vacant spaces 12, 13 by the protrusions 6 and restricted from moving in the direction of their bores. Therefore, even if the high-pressure fluid in the passage 8 acts on the junction between both members 10, 11, the O rings 14, 15 are prevented from being deformed in the direction of their bores or falling from a channeled part 9 and thus deteriorating sealing performance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasket effective as a seal for high pressure equipment such as a hydraulic valve, and more particularly to a gasket effective when used together with an O-ring.

[0002]

2. Description of the Related Art Generally, various types of gaskets are used for sealing between two members of a high pressure device such as a hydraulic valve. For example, a gasket as shown in FIG. 9 is already known. .

That is, the gasket 41 is a so-called soft metal, and compression layers 43, 43 made of a rubber material or the like are laminated on both surfaces of a substrate 42 made of a flat plate SUS material or the like with an appropriate thickness. Two parts 5 by punching
The holes 44 are formed so as to match the shapes of the joint surfaces 0 and 51, and an appropriate hole 44 is formed in a portion corresponding to the flow path 48 that communicates between the members 50 and 51. Fluid such as hydraulic oil is allowed to flow in the flow path 48 via the.

In such a gasket 41, it is often used together with the O-rings 54 and 55 in order to improve the sealing property. Therefore, the portion of the joint surface of the two members 50 and 51 facing the flow path 48. It is necessary to previously form a groove portion 49 having an appropriate depth over the entire circumference.

Then, the edge of the hole 44 of the gasket 41 is projected into the groove 49 configured as described above, and the gap between the upper surface of the gasket 41 and the inner surface of the groove 49 and the lower surface of the gasket 41 and the inner surface of the groove 49 are formed. Install O-rings 54 and 55 between and, and in this state both members 5
By integrally connecting 0 and 51 with a bolt or the like, the space between the members 50 and 51 is completely sealed, and the fluid in the flow path 48 leaks to the outside through the space between the members 50 and 51. Will be prevented.

However, in the conventional gasket 41 configured as described above, nothing is provided to limit the displacement of the O-rings 54 and 55 in the inner diameter direction (direction of the flow path 48). Therefore, when the high-pressure fluid in the channel 48 is repeatedly acted, the O-rings 54 and 55 may be deformed in the inner diameter direction as shown in FIG. 12, and in such a case, the sealing performance is impaired. , Fluid leaks out. Further, when the amount of deformation in the inner diameter direction is large, the O-rings 54 and 55 fall off from the groove portion 49,
Not only will the sealability be impaired, but it will also cause equipment failure.

On the other hand, US Pat. No. 4,211,205 discloses a gasket for sealing between a cylinder and a head of an automobile engine or the like. This gasket is prepared by laminating a plurality of thin steel plates and A compression layer made of rubber or the like is formed on the surface with an appropriate thickness,
Appropriate holes are drilled in the parts corresponding to the cylinders for reciprocating the pistons and the water channels for circulating the cooling water, and the reciprocating motion of the pistons and the circulation of the cooling water are allowed through the holes. It is supposed to be done.

However, even in such a gasket, as in the case of the gasket 41 described above, the holes formed in the portions corresponding to the cylinders, water channels, etc. remain in the state of being punched by punching or the like. Therefore, when an O-ring or the like is also used in that part, it is not possible to limit the displacement of the O-ring in the inner diameter direction, and the O-ring is greatly deformed or falls off due to fluid pressure and the sealing performance is impaired. Or cause equipment failure.

The present invention solves the above-mentioned problems of the conventional ones, and even when used in combination with an O-ring, the O-ring is deformed by the fluid pressure in the flow path and the sealing performance is improved. It is an object of the present invention to provide a gasket that can completely prevent damage to the seal, damage to the sealability caused by falling off, and failure of the device.

[0010]

In order to solve the above-mentioned problems, the present invention is mounted between two members to seal the two members and to connect the flow paths formed in both members. A gasket having a compression layer capable of being compressed and deformed when pressed on one side or both sides of a substrate is formed into a shape of a joint surface of both members, and a hole is formed at a portion corresponding to the flow path. , Projections are formed on the inner surface of this hole at predetermined intervals over the entire circumference, and the projections are bent in the circumferential direction in the direction of fluid flow in the flow passage, and the outside of the bent projections. This is a method in which an O-ring is attached to each of the parts.

[0011]

The present invention, by adopting the above means,
The gasket mounted between the two members is provided with holes for communicating the flow paths formed in both members, and projections are formed on the inner surface of the holes at predetermined intervals over the entire circumference. , The projection is bent in the direction of fluid flow in the flow path at predetermined intervals in the circumferential direction, and the O-ring is attached to the outside of the bent projection, so that the fluid pressure in the flow path is reduced. Even if it acts, the displacement of the O-ring in the inner diameter direction is limited, and the O-ring can be prevented from falling off.

[0012]

Embodiments of the present invention shown in the drawings will be described below. 1 to 3 show a first embodiment of a gasket according to the present invention, FIG. 1 is a plan view of a main portion, FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 2 is a cross-sectional view showing a mounted state of the one shown in FIG.

That is, in this gasket 1, compression layers 3 and 3 made of a rubber material or the like are formed on both surfaces of a flat plate-shaped substrate 2 made of a SUS material or the like with an appropriate thickness, and this is punched to an appropriate shape. In order to use it as a seal between two members 10, 11 such as a hydraulic valve, first, as shown in FIG. 4, it is necessary to match the shape of the joint surface of both members 10, 11. It is formed by punching.

Next, the flow path 8 that connects the two members 10 and 11 with each other.
The holes 4 of appropriate size are bored in the portion corresponding to, and the cuts 5, 5 ... Are made on the inner surface of the holes 4 in the circumferential direction at predetermined intervals (every 60 ° intervals in this embodiment). Formed,
Arc-shaped projections 6, 6 ... Are formed between the adjacent cuts 5, 5, and the projections 6, 6, ... Are alternately bent in the circumferential direction in the direction in which the fluid of the flow path 8 flows (FIG. 4). reference).

To mount the gasket 1 thus constructed between the members 10 and 11 such as a hydraulic valve, the portion of the joint between the members 10 and 11 facing the flow path 8 is preliminarily provided over the entire circumference. A groove portion 9 having an appropriate depth is bored, and the groove portion 9
The gasket 1 is mounted between both members 10 and 11 so that the edge of the hole 4 of the gasket 1 is located inside.

In this way, the gasket 1 is attached to both members 10, 1
By mounting between the two, the portion surrounded by the projections 6, 6 on the upper surface side of the gasket 1 and the inner surface of the groove portion 9,
And the projections 6, 6 on the lower surface side of the gasket 1 and the groove 9
An annular space 12, 13 is formed in a portion surrounded by the inner surface of the member 10 and the O-rings 14, 15 are mounted in the spaces 12, 13, respectively.
The spaces are integrally connected via bolts or the like.

As described above, the gasket 1 is mounted between the members 10 and 11, and the space 1 formed between the projections 6, 6 on the upper surface of the gasket 1 and the inner surface of the groove 9 is formed.
2 and O in the voids 13 formed between the projections 6, 6 on the lower surface side of the gasket 1 and the inner surface of the groove 9.
By attaching the rings 14 and 15, both members 1
The space between 0 and 11 is completely sealed, and it is possible to completely prevent the fluid in the flow path 8 from leaking outside between the members 10 and 11.

In the gasket 1 according to this embodiment configured as described above, the gasket 1 is circumferentially oriented toward the edge of the hole 4 formed in the portion corresponding to the flow path 8 communicating between the two members 10 and 11. .. are provided at predetermined intervals, and the projections 6, 6, ... Are alternately bent in the flow direction of the fluid in the flow path 8, and the bent projections 6, 6 ,. The O-rings 14 and
Since I have attached 15 to each O-ring 14, 15
Are securely held in the cavities 12, 13 by the protrusions 6, 6, ... And the displacement in the inner diameter direction is limited.

Therefore, even if the high-pressure fluid in the flow path 8 acts on the joint between the members 10 and 11, the O-rings 14 and 1
5 does not deform in the inner diameter direction to impair the sealing performance, or falls off from the groove 9 to impair the sealing performance or cause a failure of the device, and stable sealing performance can be obtained. Become.

In the above description, the protrusions 6, 6 ... Are provided at the edge of the hole 4 of the gasket 1 at intervals of 60 °, and the protrusions 6, 6 ... Are alternately bent in the direction of fluid flow. However, without being limited to this, 60
Protrusions may be provided at intervals other than ° and the protrusions may be alternately bent in the direction of fluid flow. Further, in the above description, the compression layers 3 and 3 are provided on both sides of the substrate 2, but it is also possible to provide the compression layers 3 on only one side. It may be laminated as a gasket.

FIG. 5 and FIG. 6 show a second embodiment of the gasket according to the present invention. The gasket 21 shown in this embodiment has a flat plate-like substrate 22 made of SUS material or the like with rubber on both sides. It is configured by stacking two compression layers 23, 23 made of a material or the like having an appropriate thickness, and the first portion is provided at a portion corresponding to the flow path 8 communicating the two members 10, 11. Like the one shown in the embodiment, holes of appropriate size are bored, slits 27, 27 ... Are formed on the inner surface of each hole at a predetermined interval, and an arc-shaped slit is formed between the adjacent slits 27, 27. Forming the protrusions 26, 26 ...
The projections 26, 26 ... Are bent outward in the axial direction.

Then, the gasket 2 constructed in this way
1 is mounted between the two members 10 and 11, and the protrusions 26, 26 ...
Even when an O-ring (not shown) is attached to the outer portion of ..., Both members 10, as in the first embodiment,
The space between 11 is completely sealed, the fluid in the flow path 8 can be prevented from leaking to the outside from the joint between the members 10 and 11, and each projection 26 displaces the O-ring in the inner diameter direction. Therefore, even if the high-pressure fluid in the flow path 8 acts on the joint portion between the members 10 and 11, the O-ring is excessively deformed in the inner diameter direction and the sealing performance is impaired. It will not fall off to the side to impair the sealing performance or cause a device failure.

FIGS. 7 and 8 show a third embodiment of the gasket according to the present invention. The gasket 31 shown in this embodiment has a flat plate-shaped substrate 32 made of SUS material or the like with rubber on both sides. The compression layers 33 and 33 made of a material or the like are formed to have an appropriate thickness, and the compression layers 33 and 33 are formed by stacking two compression layers 33 and 33. The first layer is provided at a portion corresponding to the flow path 8 that connects the two members 10 and 11. Similar to those shown in the embodiment, holes of appropriate size are bored, the peripheral edge of each hole is projected outward in the axial direction by drawing or bending, and a cylindrical projection 36 is formed in that portion. It was done.

The gasket 3 having the above structure
Even when 1 is mounted between the two members 10 and 11 and an O-ring (not shown) is mounted on the outer portion of each protrusion 36, the space between the members 10 and 11 is the same as in the first embodiment. Is in a completely sealed state, fluid in the flow path 8 can be prevented from leaking out from the joint between the members 10 and 11, and the protrusions 36 limit the displacement of the O-ring in the inner diameter direction. Therefore, even if the high-pressure fluid in the flow path 8 acts on the joint between the members 10 and 11, the O-ring is excessively deformed in the inner diameter direction and the sealing performance is impaired.
It will not fall off to the side to impair the sealing performance or cause a device failure.

[0025]

As described above, the present invention is configured as described above. Therefore, even when used in combination with an O-ring for use as a seal between two members of a high-pressure device such as a hydraulic valve, the O-ring is used. Is attached to the outer side of the gasket protrusion, and the protrusion restricts the displacement in the inner diameter direction. Therefore, even if the high-pressure fluid acting in the flow passage acts on the joint between the two members, Does not displace excessively in the inner diameter direction and the sealing performance is impaired, or it falls into the flow path and impairs the sealing performance, and does not cause equipment failure. It has an excellent effect such as being able to secure the property.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a gasket according to the present invention.

FIG. 2 is a sectional view taken along line AA of the one shown in FIG.

FIG. 3 is a cross-sectional view showing a mounted state of the one shown in FIG.

FIG. 4 is a plan view showing a state before forming the protrusions of the gasket shown in FIG.

FIG. 5 is a plan view showing a second embodiment of the gasket according to the present invention.

FIG. 6 is a sectional view taken along line BB of the one shown in FIG.

FIG. 7 is a plan view showing a third embodiment of the gasket according to the present invention.

FIG. 8 is a sectional view taken along line CC of FIG. 7.

FIG. 9 is a plan view showing an example of a conventional gasket.

FIG. 10 is a sectional view taken along line DD of FIG. 9.

FIG. 11 is a cross-sectional view showing a mounted state of the one shown in FIG.

12 is an explanatory view showing a deformed state of the O-ring shown in FIG. 11. FIG.

[Explanation of symbols]

 1, 21, 31, 41 ... Gasket 2, 22, 32, 42 ... Substrate 3, 23, 33, 43 ... Compression layer 4, 44 ... Hole 5 ... Notch 6, 26, 36 ... Protrusion 8 , 48 ...... Flow path 9, 49 ...... Groove portion 10, 11, 50, 51 ...... Member 12, 13 ...... Vacant 14, 15, 54, 55 ...... O-ring 27 ...... Slit

Claims (1)

[Claims] 1. A flow path (8) formed between both members (10) and (11), which is mounted between two members (10) and (11) to seal between both members (10) and (11). The shape of the joint surface of the two members (10) and (11), which is a gasket that connects the two members (10) and (11) and is provided with a compression layer (3) (3) capable of being compressed and deformed when pressed on one or both surfaces of the substrate (2). To form a hole (4) in a portion corresponding to the flow path (8), and to form projections (6) (6) on the inner surface of the hole (4) at predetermined intervals over the entire circumference. ...... is formed, and the projections (6) (6) ... are bent in the flow direction of the fluid in the flow path (8), and the projections (6) (6) Gasket characterized by being fitted with O-rings (14) and (15) respectively.