JPH0342309Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fluid connector used for connecting and disconnecting piping of various industrial machines including piping of various machines in steel works.

[Conventional technology]

This type of prior art is shown in Utility Application No. 1981-81957, which was previously filed by the applicant of the present application.
This will be explained based on FIGS. 3 and 4.

A substantially cylindrical first main body 51 is fitted and fixed into the fitting hole 50a of the fixed face plate 50, and inside the first main body 51 is a check valve that closes the valve hole 51a at the tip opening thereof by pressing it with a spring 52. 53 is slidably fitted. A small valve 55 is fixed to the distal end of the check valve 53 via a rod-shaped part 54, and this small valve 55 is connected to the first
A small valve hole 57 of a valve seat 56 that is slidably fitted on the outer periphery of the main body 51 is closed from the outside. Further, the valve seat 56 is pressed from behind by a spring 58 provided between it and the fixed face plate 50, and presses the small valve hole 57 of the tip wall 56a against the small valve 55.

On the other hand, the movable face plate 60, which is provided so as to be able to approach and move away from the fixed face plate 50, has a substantially cylindrical second main body 61 fitted and fixed into its fitting hole 60a.
A check valve 63 is slidably fitted into the main body 61 and is pressed by a spring 62 to close the valve hole 61a at the opening end thereof, similarly to the first main body 51. Further, an annular sealing material 64 that comes into contact with the tip wall 56a of the valve seat 56 is attached to the end surface of the second main body 61,
Fluid leakage between the second body 61 and the valve seat 56 is sealed. In addition, 59 and 69 in the figure are piping connection ports that contact the fluid piping.

In this fluid connector, when the movable face plate 60 approaches the fixed face plate 50, the end face of the second main body 61 comes into contact with the tip wall 56a of the valve seat 56, and then the end face of the check valve 63 comes into contact with the small valve 55. comes into contact with the end face of Then, by further moving the face plate 60,
The second main body 61 moves the valve seat 56 backward along the outer periphery of the first main body 51 against the spring 58, and as shown in FIG. Push the valve 53 open and press it against each other via the rod-shaped part 54 to close both check valves 53, 63.
Push open. At this time, the valve seat 56 is pressed against the second main body 61 and the valve seat by a pressing force caused by fluid pressure acting on a cross-sectional area obtained by subtracting the cross-sectional area of the annular sealing material 64 from the cross-sectional area of its outer diameter. The sealing state between the end faces with 56 is maintained by internal fluid pressure. When the movable face plate 60 is moved backward from the state shown in FIG.
After closing 61a, the small valve 55 closes the valve seat 56.
The small valve hole 57 of the valve seat 56 is closed, and the tip wall 5 of the valve seat 56 is closed.
The end face of the second main body 60 is separated from 6a, resulting in the separated state shown in FIG.

[Problem that the invention attempts to solve]

In the disconnected state of FIG. 3, the small valve 55 is seated in the small valve hole 57 of the valve seat 56, forming a sealed chamber A at the distal end of the first body 51. Therefore, when fluid leaks from the seating surface of the valve hole 51a of the check valve 53, the pressure in the chamber A increases, and the pressing force due to this fluid pressure presses the valve seat 56 forward. This pressing force is received by the check valve 53 of the first main body 51 via the rod-shaped part 54 connecting the small valve 55, but as the leakage progresses, the force that presses the valve seat 7 forward increases. The pressure increases, and this pressing force acts on the small valve 55, which is the weakest in terms of strength,
Damage to the small valve 55.

The cause of this problem is that the valve seat is directly received by the small valve in the first place.

[Means for solving problems]

The present invention solves the above problem by having a configuration in which the valve seat is received on the main body side.

That is, the technical means of the present invention is that the first,
a second main body, a check valve that is slidably fitted into the first and second main bodies and closes valve holes provided at the tip openings of the first and second main bodies by pressing them from the inside with a spring; A small valve having a smaller diameter than the valve hole of the second body is fixed to the tip of a rod-shaped portion extending from the check valve to the check valve of the second body, and a small valve is slidably provided in the first body. A fluid connector comprising: a valve seat having a small valve hole in its tip wall and being pressed by a spring toward the second main body to seat the small valve in the small valve hole; An outer cylinder having a connection port having a diameter larger than the outer diameter of the main body and an inner hole connected to the connection port via a step is provided, and the valve seat is slidable inside the outer cylinder. When the valve seat comes into contact with the stepped portion, the small valve hole of the valve seat is
The structure is such that it is closed by an elastic ring attached to the small valve.

[Effect]

The valve seat is slidably fitted into the outer cylinder of the first main body, and is brought into contact with the stepped portion of the outer cylinder by a spring in the separated state. Therefore, if there is leakage from the check valve of the first main body in this state, the valve seat will be pressed forward due to the increase in fluid pressure within the outer cylinder, but this pressing force will be due to the step of the outer cylinder. It does not act directly on the small valve that closes the small valve hole of the valve seat. In addition, since the valve seat is configured to abut against the stepped part of the outer cylinder, the elastic ring attached to the small valve only needs to fill the gap between the valve seat and the small valve hole. When the fluid pressure inside the cylinder increases, this pressure causes the pressure fluid inside the outer cylinder to escape from the elastic ring, thereby preventing the pressure inside the outer cylinder from increasing abnormally.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows a partially vertical side view of the fluid connector of the present invention, in which 1 is a first main body, 2 is a second main body, 3 is an outer cylinder, 4 and 5 are check valves, 6 is a small valve, and 7 is the valve seat.

The first main body 1 has a pressing plate 1 on the front side of the fixed face plate 10.
It is inserted from the rear of the outer cylinder 3 fixed by the piping cover 13, the rear end is fixed by the piping cover 13, the tip is formed into a valve hole 8 having an inclined part, and a check valve is installed inside. It accommodates 4.

The second main body 2 has a substantially cylindrical shape, and has a distal end formed into a valve hole 9 having an inclined portion, and a rear end formed into a movable face plate 1.
It is fixed to the front surface of 1 via a pressing plate 14, and houses a check valve 5 inside.

The outer cylinder 3 is a cylindrical body having an inner hole 3a into which the valve seat 7 is fitted, and has a connecting port 15 at the tip, which has a smaller diameter than the inner hole 3a and a larger diameter than the outer diameter of the second main body 2. However, there is a stepped portion 1 between this connection port 15 and the inner hole 3a.
There are 6.

The check valve 4 includes a cylindrical guide ring 17 that is slidably fitted into the first main body 1, and a valve body 19 that is fixed to the guide ring 17 via a valve shaft 18.
It is pressed into the valve hole 8 by a spring 21 disposed between the guide ring 7 and a spring receiver 20 at the rear end. The valve body 19 is seated so as to protrude from the valve hole 8, and has a substantially streamlined outer shape extending rearward from the protrusion. In addition, the guide ring 17 includes
A fluid passage hole 22 is formed along the axial direction of the valve shaft 18 to communicate the piping connection port 23 of the cover 13 and the valve hole 8.
An O-ring 24 is installed to prevent fluid from leaking from.

Like the check valve 4, the check valve 5 includes a cylindrical guide ring 25 that is slidably fitted into the second main body 2.
and a valve body 27 fixed to this guide ring 25 via a valve shaft 26, and a spring receiver 28 at the rear end.
The valve hole 9 is pressed against the valve hole 9 by a spring 29 provided between the valve hole 9 and the valve hole 9. The tip of the valve body 27 is formed into a flat surface, which is substantially the same as the end surface of the second body 2, and an O-ring 30 is attached to the outer periphery of the valve body 27, and a streamlined shape is formed on the back side of the valve body 27. There is. Further, fluid passage holes 31 and 32 are formed in the guide ring 25 and the spring receiver 28 along the axial direction of the valve shaft 26 so that the piping connection port 33 of the movable face plate 11 and the valve hole 9 communicate with each other. It's summery.

The small valve 6 is fixed to the tip of a rod-shaped portion 34 connected to the tip of the check valve 4, and an O-ring 35 is attached to the outer periphery of the small valve 6.
The tip surface is formed into a flat surface that comes into contact with the end surface of the check valve 5, and has a substantially streamlined shape that is continuous with the streamlined shape of the check valve 5 when it comes into contact with the check valve 5. It is formed on the back side.

The valve seat 7 has a spring receiver 36 that is slidably fitted into the inner hole of the outer cylinder 3 and slidably fitted to the rod-shaped portion 34. It is pressed against the stepped portion 16 of the outer cylinder 3 by a spring 37 disposed therebetween. A fluid passage hole 38 is formed in the spring receiver 36 along the axial direction of the rod-shaped portion 34 . Further, a small valve hole 39 having an inclined portion is formed in the center of the tip wall 7a, and this small valve hole 39 is closed by the small valve 6. In this closed state, the valve seat 7 is in contact with the stepped portion 16 of the outer cylinder 3 and its position is determined, so that the small valve 6 is in the small valve hole 39.
The O-ring 35 has a structure that does not come into contact with the small valve hole 39, and the elastic force of the O-ring 35 attached to the outer periphery of the O-ring 35 closes the gap between the small valve hole 39 and the small valve hole 39.
It is filled in by 5. In addition, 40 is the small valve hole 39
It is an annular sealing material that is attached around the valve seat 7, and when the second main body 2 comes into contact with the valve seat 7, it is crimped and surrounds the opening of the valve hole 9. The sealing state between the main body 2 and the valve seat 7 is maintained by a pressing force caused by fluid pressure acting on the cross-sectional area of the valve seat 7 minus the cross-sectional area of the annular sealing material 40. It's summery.

In the fluid connector configured as described above, when the movable face plate 11 is moved a predetermined distance toward the fixed face plate 10, the disconnected state shown in FIG. 1 changes to the connected state shown in FIG. 2. That is, the second main body 2 is fitted into the connection port of the outer cylinder 3, and the end face of the second main body 2 contacts the tip wall 7a of the valve seat 7 and moves further, so that the end face of the check valve 5 and the small The end faces of the valve 6 abut against each other, causing the valve seat 7 to move backward against the spring 37. Then, as the valve seat 7 slides inside the outer cylinder 3, the small valve 6 is unseated from the small valve hole 39, and the check valves 4 and 5 are pushed against each other via the rod-shaped portion 34, and the valve hole 8 , 9 are opened, and the piping connection ports 23 and 33 are in a connected state.

When the movable face plate 11 is moved backward from the connected state shown in FIG. The small valve 6 slides into the small valve hole 3 of the valve seat 7.
9 is closed, and the valve seat 7 comes into contact with the stepped portion 16 of the outer cylinder 3, resulting in the separated state shown in FIG.

In this separated state, the valve seat 7 comes into contact with the stepped portion 16 of the outer cylinder 3 and is restricted from moving forward, and the small valve 6 is moved between the small valve hole 39 and the small valve hole 39 by the elasticity of the O-ring 35. filling the gap between In this state, when fluid leaks from the check valve 4 that closes the valve hole 8 of the first main body 1, the pressure in the chamber 41 behind the valve seat 7 increases, pushing the valve seat 7 forward. Although a force is generated, this pressing force is received by the step 16 of the outer cylinder 3 because the valve seat 7 is in contact with the step 16 of the outer cylinder 3, and cannot act on the small valve 6. do not have. Then, as the leakage progresses and the pressure in the chamber 41 continues to rise, the O-ring 35 attached to the small valve 6 will be moved to the O-ring 3 that is in close contact with the small valve hole 39.
The fluid is ejected to the outside from the portion 5 to suppress the pressure increase in the chamber 41. Therefore, the pressing force acting on the valve seat 7 does not increase any further, and the force pressing the valve seat 7 against the stepped portion 16 is reduced.

In this embodiment, the step 16 is provided at the connection port 15 of the outer cylinder 3, but the step 16 is provided in the inner hole 3a of the outer cylinder 3, and the flange that abuts the step 16 is It may also be configured to be provided at the rear end of the valve seat 7.

[Effect of idea]

As is clear from the above description, according to the fluid connector of the present invention, the valve seat is slidably fitted into the outer cylinder of the first main body, and the valve seat is fitted into the stepped portion of the outer cylinder. Since they are in contact with each other, the stepped portion of the outer cylinder can receive the pressing force due to the fluid pressure acting on the valve seat, and it is possible to prevent damage to the small valve that closes the small valve hole of the valve seat.

In addition, since the small valve is tightly attached to the small valve hole of the valve seat via an elastic ring, the fluid inside the outer cylinder is discharged to the outside via the elastic ring, which prevents the fluid pressure from rising abnormally. can be prevented and the force acting on the valve seat can be reduced. Therefore, structural costs can be reduced without unnecessarily increasing the strength of the outer cylinder that receives the valve seat.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view showing an embodiment of the fluid connector of the present invention, FIG. 2 is a partial vertical cross-sectional view showing the connection state of the same embodiment, and FIGS. 3 and 4 are FIG. 2 is a vertical cross-sectional view showing an example of a conventional fluid connector. 1...First main body, 2...Second main body, 3...Outer cylinder, 3a...Inner hole, 4, 5...Check valve, 6...Small valve, 7...Valve seat, 7a... Tip wall, 8, 9...
...Valve hole, 15...Connection port, 16...Step, 34...
... Rod-shaped part, 35 ... Elastic ring (O-ring), 3
9... Small valve hole.

Claims (1)

[Claims for Utility Model Registration] First and second bodies arranged on the same axis so that they can approach and separate from each other, and respective tips that are slidably fitted into the first and second bodies. A check valve that closes a valve hole provided in the opening by pressing it from the inside with a spring, and is fixed to the tip of a rod-shaped part extending from the check valve of the first body toward the check valve of the second body. a small valve having a smaller diameter than the valve hole of the second main body; and a small valve that is slidably provided in the first main body and has a small valve hole in its tip wall and is pressed by a spring toward the second main body. a valve seat for seating in a small valve hole; and a fluid connector, the first body having a connection port having a diameter larger than the outer diameter of the second body, and a connection port connected to the connection port via a step. The valve seat is slidably fitted into the outer cylinder, and when the valve seat comes into contact with the stepped portion, the small valve hole of the valve seat is inserted into the outer cylinder. of,
A fluid connector characterized in that it is configured to be closed by an elastic ring attached to a small valve.