JPS5939266Y2 - pipe fittings - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe joint used in muddy water, seawater, or rivers.

It goes without saying that when piping is installed in muddy water and a piping joint is used, it is necessary to prevent mud, sand, etc. from entering through gaps in the pipe joint.

However, in known pipe joints of this type, a dust cover made of a rubber-like elastic body is integrally fitted on the surface of the operating ring that is operated when the female member and male member are attached and detached, and the dust cover of the rubber-like elastic body is attached to the inner peripheral edge of the cover. It has a structure in which the tapered surface of the outer peripheral end of the fitted dust ring is crimped, so the dust cover must be operated together with the operating ring, and the sliding surface with the female joint body will be worn out due to the movement of the dust cover. However, there was a drawback that the sealing effect was impaired due to wear.

Moreover, with the seal structure described above, the contact area of the seal members that come into contact with each other is very small, and at the same time, the external force applied during hand-held operation causes the compressive elasticity of the dust cover to change over time, which reduces the sealing action and durability. It was also a cause of damage.

The present invention relates to a pipe joint that was devised for the purpose of ensuring the durability of the sealing action in view of the above-mentioned drawbacks of conventional pipe joints equipped with dust rings. An example will be explained based on the drawings.

10 is a male member of the pipe joint of the present invention, 30 is a female member,
In the following explanation, the side facing the other party will be referred to as the "front" and the opposite side will be referred to as the "back".

The male member 10 is provided with a circumferential groove 14 for engaging a locking element (a ball in the embodiment) at a predetermined position on the outer periphery of the insertion portion 12 that is inserted into the female member 39, and a circumferential groove 14 for engaging a locking element (a ball in the embodiment). The valve element 18 for closing the opening is resiliently resiliently built in by a spring 20.

Further, the male member 10 is provided with an outer peripheral flange 22, and an inwardly tapered surface 24 that widens toward the "front" side is formed on the outer peripheral flange.

A locking element 36 is loosely fitted into a through hole 34 formed in the main body body 32 of the female member 30, and an operating ring 40 has a single-step tapered surface 38 on the inner peripheral surface for pressing the locking element 36 in a centripetal direction. is fitted onto the outer peripheral surface of the main body body 32 by being pressed by a spring 42, and furthermore, a guide fitting 46 having a fluid passage hole 44 is screwed to the rear end of the main body body 32, and the valve guide fitting 46 has a An inner ring 48 that maintains a sealed state is resiliently fitted by a spring 50, and the lock element 36 is supported by the inner ring 48.

Furthermore, a male member 10 is attached to the outer periphery of the operating ring 40 of the female member 30.
A protective cylinder 54 made of rubber and having an outwardly facing tapered surface 52 in surface contact with the inwardly facing tapered surface 24 formed on the outer peripheral flange 22 at the front end thereof is tightly fitted.

The rear end portion 56 of the protective tube 54 is connected to the outer circumferential groove 6 of the main body body portion 32.
0, but in order not to hinder the movement of the operation ring 40 in the axial direction, the protective cylinder 54 is
The length of the ring is made to be more generous than the length of the operation ring 40 plus the ring opening stroke length.

58 is a tightening band for the protective tube 54.

Next, the operation of the above embodiment will be explained.

When the insertion portion 12 of the male member 10 is inserted into the female member 30 in order to join the male and female members, the inner ring 48 is moved backward against the elastic force of the spring 50, and the guide fitting 46 is moved against the elastic force of the spring 20. Since the valve body 18 is moved back against the
4 will open.

On the other hand, the locking element 36 is locked in the circumferential groove 14, and the operation ring 40 prevents the locking element 36 from floating in the radial direction, thus connecting the two female members 1030.

At this time, the operating ring 40 is pressed by the spring 42, so that the outward tapered surface 52 of the protective tube 54 fitted onto the operating ring 40 is inwardly tapered. as shown in FIG. 2, in a sealed state.

In addition, when removing both the male and female members, when the operating ring 40 (in appearance, the protective cap 54) is removed against the repulsion of the spring 42, the lock element 36 can freely float in the radial direction. The male and female members 10.30 can then be separated.

As is clear from the above description, according to the present invention, when the male and female members are connected, the locking element 36 does not need to be operated without operating the operating ring 40.
is automatically released and both members are connected.

Therefore, since it is not necessary to apply an artificial external force to the protective cylinder 54 in the axial direction, the compressive elasticity of the protective cylinder 54 in the axial direction does not change over time, and the sealing effect can be made permanent.

Then, the outward tapered surface 52 formed at the front end of the protective tube 54 comes into contact with the inward tapered surface 24 provided on the outer peripheral collar 22 of the male member 10, and the action of the spring 42 to press the operating ring 40 Because they are in contact with each other under pressure,
Even if the joint is used in muddy water, rivers, seawater, etc., it is possible to prevent intruders from entering the fitting portion of the male and female members that would prevent them from separating.

In other words, the sealing surface is a wide tapered surface, and the sealing action is performed over a wide area under the pressure of the spring, so even if vibrations are applied to the joint from the outside or the conductive fluid pulsates, it will not work. The seal remains completely sealed.

[Brief explanation of the drawing]

The drawings show an embodiment of the pipe joint according to the present invention.
The figure is a longitudinal side view showing the uncoupled state, and FIG. 2 is a longitudinal side view showing the coupled state. 10...Male member, 14...Peripheral groove, 22
......Outer rim, 24...Tapered surface, 3
0...Female member, 36...0.・・Lock, 40
......Operation ring, 48...Inner ring, 52...
...Tapered surface, 54...Protective tube.

Claims (1)

[Scope of utility model registration request] An operating ring provided on the outer periphery of the main body body so as to be slidable in the axial direction prevents the lock from escaping outward, and an inner ring provided on the inner periphery of the main body body so as to be slidable in the axial direction. The locking force of the hole itself into which the locking element is inserted prevents the locking element from escaping in the inner circumferential direction, and in the uncoupled state, the elastic force of the spring presses the inner ring in the axial direction to prevent the locking element from escaping. It has a female member that prevents protrusion toward the inner circumferential surface, and a surface that presses the inner ring against the elastic force of the spring, and that engages with the locking element when the female member is fully connected. A pipe joint consisting of a male member having a groove, one end of which is fixed to the outer periphery of the operating ring of the female member, and the other end is fixed to the outer periphery of the body body, and the other end is fixed to the outer periphery of the operating ring.
A flexible protective cylinder whose length corresponds to the sliding distance of the operating ring is placed over the outer periphery of the male member, while the end face of the protective cylinder is A pipe joint with a flange that has an inward tapered surface that makes surface contact with an outwardly tapered surface.