JPH11351409A - Sealing structure of fluid apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To seal a space between a fluid apparatus and a connection body without using a seal tape by comprising the connection body fixed to the fluid apparatus and a movable member moving forward and backward with respect to the connection body, and pressing the movable member toward the fluid apparatus by the fluid pressure of the pressing fluid supplied to the fluid apparatus. SOLUTION: In a sealing structure comprising a plug-shaped connection body 2 screwed on a fluid apparatus 1 at a male screw part 4, and a cylindrical movable member movable forward and backward to the connection body 2, a 180 deg. folded part 5 is extended from an apex of the connection body 2, and the movable member 3 is slidably fitted in an annular area formed by the folded part. A sealed chamber 6 for pressing the movable member 3 toward the fluid apparatus 1 by the fluid pressure of the pressurized fluid is defined between the connection body 2 and the movable member 3. The pressurized fluid is guided into the sealed chamber 6 from a passage shown by an arrow, and the fluid apparatus 1 and the connection body 2 are sealed by sliding and pressing the movable member 3 toward the fluid apparatus 1 through a sealing member 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seal structure for a fluid device.

[0002]

2. Description of the Related Art Conventionally, when connecting to a fluid device or the like by sealing with a plug or the like, the following has been performed.

For example, as shown in FIGS. 7 and 8, a sealing tape 20 made of ethylene tetrafluoride is wound around a blind plug 21.
Screw it into the fluid device 22 and retighten it with a tool. After the use of the fluid device 22, the blind plug 21 is loosened and removed, and the used sealing tape 20 is peeled off from the blind plug 21.

[0004] However, there is a problem that it takes a lot of time to attach and peel the seal tape 20 to and from the plug. That is, the used seal tape 20 that has been pressed against and closely adhered to the plug is hard to peel off.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention
It is an object of the present invention to provide a seal structure for a fluid device that requires less time for attachment and detachment than before.

[0006]

In order to solve the above-mentioned problems, the present invention employs the following technical means.

[0007] A seal structure for a fluid device according to the present invention includes a connecting body to be fixed to the fluid device and an advancing / retreating member capable of moving back and forth with respect to the connecting body, and a fluid pressure of a pressurized fluid supplied to the fluid device. By pressing the advancing / retreating member toward the fluid device, a seal is provided between the fluid device and the connection subject.

According to the seal structure of the fluid device, when the connecting body is fixed to the fluid device and the pressurized fluid is supplied, the fluid pressure of the pressurized fluid causes the advancing / retreating member to advance and retreat with respect to the connecting body to direct the fluid device. To seal the space between the fluid device and the connection body. Therefore, it is possible to seal between the fluid device and the connection subject without using a seal tape.

An airtight chamber, into which the supplied pressurized fluid is guided, and which presses the reciprocating member toward the fluid device by the fluid pressure of the pressurized fluid, may be provided between the connection main body and the reciprocating member. Good. According to this structure, the advancing / retreating member can be efficiently pressed toward the fluid device by the fluid pressure of the pressurized fluid guided to the airtight chamber. Further, the connection main body may have a communication hole for guiding the supplied pressurized fluid to the airtight chamber.

[0010] Further, an O-ring for ensuring the tightness of the pressurized fluid guided to the airtight chamber may be provided. With this configuration, it is possible to prevent leakage of the pressurized fluid due to sliding of the advance / retreat member.

[0011] A seal member may be interposed between the fluid device and the connection body. With such a configuration, the space between the fluid device and the connection subject can be more reliably sealed by the seal member.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) As shown in FIGS. 1 to 4, a sealing structure of a fluid device according to this embodiment includes a plug-shaped connecting body 2 to be fixed to a fluid device 1 (for example, a device main body, piping, or the like).
A tubular reciprocating member 3 which is capable of reciprocating with respect to the connection main body 2. The connection main body 2 has a male screw portion 4 and is screwed and fixed to a female screw portion of the fluid device 1.

The connection main body 2 has a 180 ° folded portion 5 extending from the top thereof, and the advance / retreat member 3 is slidably fitted in a region formed therebetween. An airtight chamber 6 that presses the reciprocating member 3 toward the fluid device 1 by the fluid pressure of the pressurized fluid is provided between the connection main body 2 and the reciprocating member 3. A communication hole 7 for guiding the supplied pressurized fluid from the inside to the hermetic chamber 6 is formed in two places of the connection main body 2.

O-rings 8 are interposed between the connection main body 2 and the reciprocating member 3 at two positions inside and outside, thereby ensuring the tightness of the pressurized fluid guided to the airtight chamber 6. Fluid leakage does not occur due to sliding. The supplied pressurized fluid is guided to the airtight chamber 6 by the flow path indicated by the arrow in FIG.

An O-ring is interposed as a seal member 9 between the fluid device 1, the connection main body 2, and the tip of the advance / retreat member 3. As shown in FIGS. 3 and 4, the fluid member 1 is slid toward the fluid device 1 and pressed by the fluid pressure of the pressurized fluid supplied to the fluid device 1, thereby connecting the fluid device 1 to the fluid device 1. 2 is sealed.

Next, the use state of the seal structure of the fluid device of this embodiment will be described. When the connection main body 2 is screwed into the fluid device 1 to supply a pressurized fluid, the reciprocating member 3 advances and retreats with respect to the connection main body 2 by the fluid pressure of the pressurized fluid, and the fluid device 1
, And the space between the fluid device 1 and the connection main body 2 is sealed.

That is, the airtight chamber 6 is pressurized by the fluid pressure of the supplied pressurized fluid, and the fluid pressure presses the pressure receiving surface of the reciprocating member 3 in the axial direction to cause sliding displacement. Seal member 9 seals the outer periphery of the male screw portion 4 of the connection main body 2 in a ring shape.

Therefore, it is possible to seal between the fluid device 1 and the connection main body 2 without using a seal tape, and there is an advantage that it takes less time to remove and attach than conventional ones. Further, there is an advantage that the seal is automatically completed between the fluid device 1 and the pressurized fluid simply by supplying the fluid.

An airtight chamber 6 is provided between the connecting body 2 and the reciprocating member 3.
Is formed, there is an advantage that the reciprocating member 3 can be efficiently pressed toward the fluid device 1 by the fluid pressure of the pressurized fluid guided to the airtight chamber 6.

Further, since the O-ring 8 for ensuring the tightness of the pressurized fluid guided to the airtight chamber 6 is provided, the reciprocating member 3 is provided.
There is an advantage that leakage of the pressurized fluid due to sliding of the pressure can be prevented.

In addition, since the sealing member 9 is interposed between the fluid device 1 and the connecting body 2, there is an advantage that the fluid device 1 and the connecting body 2 can be more reliably sealed. (Embodiment 2) Next, Embodiment 2 will be described focusing on differences from Embodiment 1.

As shown in FIG. 5, in this embodiment, a screw groove 10 is formed through the top of the connection main body 2, and the screw groove 10 is formed.
A pressure gauge and other measuring devices can be connected to the device. When a measuring device or the like is connected to the screw groove 10 to close the system of the pressurized fluid, it can be used in the same manner as in the first embodiment.

As shown in FIG. 6, the seal structure of the fluid device is preferably used for closing or opening a flow path used for inspection of various fluid devices 1 such as a pressure test and an airtightness test. Can be.

[0024]

The present invention is configured as described above and has the following effects.

Since the sealing between the fluid device and the connection main body can be performed without using a sealing tape, a sealing structure for the fluid device which requires less time for attachment and detachment than before can be provided.

[Brief description of the drawings]

FIG. 1 is a first embodiment of a seal structure of a fluid device according to the present invention.
FIG.

FIG. 2 is an exploded perspective view of a connection main body and an advance / retreat member of FIG.

FIG. 3 is a cross-sectional view for explaining a state of sealing between a fluid device and a connection main body.

FIG. 4 is a cross-sectional view for explaining a state of sealing between a fluid device and a connection main body.

FIG. 5 is a second embodiment of the seal structure of the fluid device according to the present invention.
FIG.

FIG. 6 is a schematic diagram of inspection of a fluid device.

FIG. 7 is a perspective view of a state in which sealing tape is wound around a blind plug and connected to a pipe of a fluid device.

FIG. 8 is a perspective view of a state in which a blind plug wound with a sealing tape is connected to a fluid device or the like.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid apparatus 2 Connection main body 3 Advance / retreat member 6 Airtight chamber 7 Communication hole 8 O-ring 9 Seal member

Claims (5)

[Claims] 1. A connecting device to be fixed to a fluid device, and an advancing / retracting member capable of moving back and forth with respect to the connecting device, wherein the advancing / retreating member is directed toward the fluid device by a fluid pressure of a pressurized fluid supplied to the fluid device. A seal structure for a fluid device, characterized in that the fluid device and the connection body are sealed by pressing and pressing. 2. The supplied pressurized fluid is guided, and
The sealing structure for a fluid device according to claim 1, wherein an airtight chamber for pressing the reciprocating member toward the fluid device by a fluid pressure of the pressurized fluid is provided between the connection main body and the reciprocating member. 3. The seal structure for a fluid device according to claim 2, wherein the connection body has a communication hole for guiding the supplied pressurized fluid to the airtight chamber. 4. The seal structure for a fluid device according to claim 2, further comprising an O-ring for ensuring the tightness of the pressurized fluid guided to the airtight chamber. 5. The seal structure for a fluid device according to claim 1, wherein a seal member is interposed between the fluid device and a connection main body.