JPH05126841A - Fluid apparatus - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a fluid device that requires a large space and can be maintained safely. [Structure] The fluid device 10 includes a pipe 12 having a passage 14.
including. The pipe 12 is connected to the passage 14,
The through hole 16 is formed. The holding member 20 is attached to the through hole 16. The holding member 20 has a through hole 16
The movable member 36 is held so as to be displaceable along. Through the holding member 20 and the movable member 36, the through hole 16
Is blocked. The movable member 36 is biased toward the passage 14 by the spring 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid device, and more particularly to a fluid device capable of detecting the presence or absence of a fluid such as gas or liquid in a piping system.

[0002]

2. Description of the Related Art Conventionally, there have been known fluid devices of this type for a liquid, such as those using a sight glass capable of visually observing the passage of the liquid and those using a flow meter connected to the passage of the liquid. There was one using a pressure gauge connected to a gas passage.

[0003]

However, in the case where the sight glass is used, the sight glass may be broken, and it is difficult to safely maintain the sight glass. In addition, a space using a flow meter or a pressure gauge requires a large space.

Therefore, a main object of the present invention is to provide a fluid device which requires a large space and can be maintained safely.

[0005]

According to the present invention, a through hole is formed so as to communicate with a passage through which a fluid flows, and a holding member attached to the through hole, and a holding member that is displaceably held along the through hole. The fluid device includes a movable member that cooperates with the holding member to close the through hole, and an urging unit that urges the movable member toward the passage.

[0006]

When the fluid does not exist in the passage, no pressure is applied to the movable member from the passage side. Therefore, the movable member does not displace. On the other hand, if a fluid such as gas or liquid exists in the passage, the fluid applies a pressure to the movable member from the passage side. Therefore, the movable member is displaced along the through hole against the biasing force of the biasing means. Therefore, the presence or absence of fluid in the passage can be detected by looking at the movable member.

[0007]

According to the present invention, in a fluid device capable of detecting the presence or absence of a fluid in a passage, a flow meter and a pressure gauge are not used, so that a wide space is not required and a side glass is not used. Can be maintained.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an illustrative view of a main part showing an embodiment of the present invention. The fluid device 10 includes a pipe 12. Piping 1
2 has a passage 14 extending in its axial direction. A through hole 16 is formed in the pipe 12 so as to communicate with the passage 14. In this case, the through hole 16 has a diameter of the pipe 1
2 is widened on the outer peripheral surface and narrowed on the inner peripheral surface of the pipe 12 in a stepped shape. Further, in the pipe 12, a female screw portion 18 is formed on the inner peripheral surface of the wide diameter portion of the through hole 16.

A holding member 20 is attached to the through hole 16 of the pipe 12. The holding member 20 includes, for example, a cylindrical body portion 22, and a ring-shaped collar portion 24 is formed at one axial end of the body portion 22, for example. Also, the body 2
A male screw portion 26 is formed around the circumference of 2. Then, the male screw portion 26 is screwed into the female screw portion 18 of the pipe 12.

Further, an annular recess 28 is formed on the other end surface of the body 22 of the holding member 20, and this recess 28 has
For example, an O-ring 30 is fitted as a sealing material.
An annular recess 32 is also formed in the flange 24 facing the outer peripheral surface of the pipe 12, and an O-ring 34, for example, as a sealing material is fitted in the recess 32. These O-rings 30 and 34 are for maintaining airtightness between the pipe 12 and the holding member 20. Instead of the O-ring, another sealing material such as a metal ring or packing may be used.

A movable member 36 is held by the holding member 20. The movable member 36 is, for example, a disk-shaped sliding portion 3
Including 8. The sliding portion 38 is the body portion 22 of the holding member 20.
It has an outer diameter substantially the same as the inner diameter of and is slidably fitted into the body portion 22. At the center of the sliding portion 38, for example, a cylindrical display portion 40 is formed. The display portion 40 has an outer diameter substantially the same as the inner diameter of the collar portion 24 of the holding member 20, and is inserted into the collar portion 24 of the holding member 20.

An annular recess 42 is formed around the sliding portion 38 of the movable member 36, and an O-ring 44, for example, as a sealing material is fitted in the recess 42 as well. The O-ring 44 is for maintaining airtightness between the holding member 20 and the movable member 36. Instead of the O-ring, another sealing material such as a metal ring or packing may be used.

Further, a spring 46 is provided as a biasing means around the display portion 40 between the flange portion 24 of the holding member 20 and the sliding portion 38 of the movable member 36. This spring 46 connects the movable member 36 to the passage 1 of the pipe 12.
This is for urging the No. 4 side with a constant urging force.

In this fluid device 10, the passage 1 of the pipe 12 is
4 in the absence of fluid, the movable member 3 from the passage 14 side.
No pressure is applied to 6. Therefore, the movable member 36 does not move. On the other hand, when a fluid such as gas or liquid is present in the passage 14, the fluid applies a pressure to the sliding portion 38 of the movable member 36 from the passage 14 side. Therefore, the movable member 36 is displaced along the body portion 22 of the holding member 20, that is, the through hole 16 against the biasing force of the spring 46, and the tip of the display portion 40 projects from the brim portion 24 of the holding member 20. .. Therefore, in the fluid device 10, the presence or absence of fluid in the passage 14 can be clearly detected by looking at the display section 40 of the movable member 36. The display unit 4
If a paint of a prominent color such as fluorescent color or red is applied to the tip of 0, the presence or absence of the fluid in the passage 14 can be detected more clearly.

FIG. 2 is an illustrative view of a main part showing another embodiment of the present invention. In this embodiment, as compared with the embodiment shown in FIG. 1, in particular, a ring-shaped flange 48 is sandwiched between the pipe 12 and the holding member 20. This flange 4
An opening on one end side of a bellows-shaped tubular member 50 made of metal, which has elasticity, is fixed to the opening 8. This tubular member 50
Are arranged in the body portion 22 of the holding member 20. Further, for example, a disc-shaped sealing plate 52 is fixed to the opening on the other end side of the tubular member 50, and the opening is sealed by the sealing plate 52. Further, a columnar display portion 54 is formed at the center of the sealing plate 52. The display portion 54 is inserted into the collar portion 24 of the holding member 20. That is, in this embodiment,
Flange 48, tubular member 50, sealing plate 52, and display unit 5
The movable member is constituted by 4, and the urging means is constituted by the tubular member 50.

In the fluid device 10 shown in FIG. 2, when a fluid is present in the passage 14 of the pipe 12, the fluid causes the bellows-shaped tubular member 50 to extend, and the sealing plate 52 causes the holding member 20 to be on the side of the flange portion 24. The display portion 54 projects from the collar portion 24. Therefore, also in this fluid device 10, the display unit 5
4, the presence or absence of fluid in the passage 14 can be clearly detected.

In each of the above-described embodiments, the presence or absence of fluid in the passage is detected by the displacement of the movable member. However, when the fluid is present in the passage, the switch of the movable member is turned on or off. It may be provided in the vicinity and the presence or absence of fluid in the passage may be detected by the switch.

[Brief description of drawings]

FIG. 1 is an illustrative view of a main part showing an embodiment of the present invention.

FIG. 2 is an illustrative view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

 10 Fluid Equipment 12 Piping 14 Passage 16 Through Hole 20 Holding Member 36 Movable Member 38 Sliding Part 40 Display Part 46 Spring 48 Flange 50 Cylindrical Member 52 Sealing Plate 54 Display Part

Claims (1)

[Claims] 1. A holding member having a through hole formed so as to communicate with a passage through which a fluid flows, the holding member being attached to the through hole, the holding member being displaceably held along the through hole, and cooperating with the holding member. A fluid device comprising: a movable member that works to close the through hole; and an urging unit that urges the movable member toward the passage.