JP2006064083A - Joint member - Google Patents

Abstract

【Task】
Even if the male joint member and the female joint member of the pipe joint are connected and the valve member is held in the open position for a long period of time, the valve member and the seal ring are prevented from sticking.
[Solution]
A forward position that closes the fluid passage when the joint body 20 having the fluid passage 18 and the other joint member 14 are not connected, and a backward position that retreats relative to the joint body and opens the fluid passage when connected. A valve member 22 that is movable between the valve member 22, a spring 44 that urges the valve member to the advance position, and seal rings 40 and 42 provided on the joint body 20, and the valve member is in the retracted position. In some cases, when separated from the seal ring and disconnected from the other joint member 14, the spring is slid with respect to the seal ring and returned to the advanced position.
[Selection] Figure 2

Description

  The present invention relates to a pipe joint composed of a female joint and a male joint member connected to each other, and particularly to a male or female joint member constituting the pipe joint.

One joint member in a pipe joint composed of a female joint member and a male joint member connected to each other, the joint body having a fluid passage, and the fluid passage being closed when the other joint member is not connected A valve member that is movable between a position and a retracted position that is pushed by the other joint member at the time of connection and moves backward relative to the joint body to open the fluid passage. There is.
In such a joint member, the valve member is set between the side surface of the valve member and the joint body so that fluid leakage does not occur when the valve member is displaced between the advanced position and the retracted position. A seal ring is set (see, for example, Patent Document 1).
As described above, the valve member is in the open position when the female and male joint members are connected, and returned to the closed position (usually by a spring) as the connection is released. However, if it is connected for a long time, the seal ring sticks to the valve member or the joint body, and the connection between the female and male joint members is released. However, the valve member may remain in the open position and not return to the closed position. That is, in this case, the fluid passage is opened, so that the fluid is discharged to the outside.
Utility model registration No. 604307

  In view of these points, the present invention provides a joint member that prevents the valve member from staying in the open position and not returning to the closed position due to the sticking of the seal ring.

That is, the present invention is one joint member in a pipe joint composed of a female joint member and a male joint member connected to each other,
A coupling body having a fluid passage;
A forward position that closes the fluid passage when not connected to the other joint member, and a backward position that is pushed by the other joint member when connected to move backward relative to the joint body to open the fluid passage. A valve member movable between and
A spring for urging the valve member to the forward position;
A seal ring provided on the joint body for sealing between the side surface of the valve member and the joint body when the valve member is in the advanced position;
When the valve member is in the retracted position, the valve member is separated from the seal ring, and when the connection with the other joint member is released, the valve member returns to the advanced position while sliding with respect to the seal ring by the spring. A joint member for a pipe joint is provided.

  That is, in this joint member, when the valve member is in the retracted position where the fluid passage is opened, the valve member is separated from the seal ring. Such sticking does not occur, and it is possible to return to the closed position when the connection is released.

As a concrete example,
A cylindrical member having the fluid passage opened at one end of the joint body;
A shaft-shaped member that is disposed to extend a predetermined length along the axis of the fluid passage at the opening portion of the fluid passage of the tubular member, and is fixed to the tubular member;
The valve member is cylindrical, and in the forward movement position, a cylindrical fluid passage portion forming a part of the fluid passage is formed between the shaft member and the inner peripheral surface of the cylindrical member. And the fluid passage is closed, and in the retracted position, the fluid passage is opened by releasing the fitting with the cylindrical fluid passage portion.
A first seal ring provided near a front end edge of an inner peripheral surface of the tubular member; a second seal ring near the rear end of the shaft-like member behind the first seal ring; Have
The inner circumferential surface of the valve member has a tapered portion whose diameter gradually decreases rearward from the front end edge, and preferably the inner diameter of the front end edge of the tapered portion is the maximum diameter. It should be approximately the same or larger than the outer diameter of the ring.

  That is, in this example, the first seal ring provided near the front end edge of the inner peripheral surface of the cylindrical member is also the second seal near the rear end of the shaft member behind the first seal ring. A ring is provided to seal the outer peripheral surface and the inner peripheral surface of the tubular valve member. When the valve member is in the retracted position, the valve member is separated from the first and second seal rings, This prevents sticking by the seal ring. When the connection of the joint member is released, the valve member returns to the advanced position as the mating joint member is pulled apart, but a tapered portion is provided on the inner peripheral surface of the valve member. The inner circumferential surface can be passed over the second seal ring without receiving excessively large frictional resistance with respect to the second seal ring, and after that, even when the first seal ring is reached, the first seal ring slides on the first seal ring. It moves smoothly to the forward position while moving.

  In this case, the diameter of the front end edge portion of the shaft-shaped member is gradually reduced toward the rear, and when the valve member is in the advanced position, the tapered portion is the front end of the shaft-shaped member. It is preferable to engage the part.

As a more specific example, the shaft-shaped member has an extension extending rearwardly from the shaft-shaped member in the fluid passage, and the extension is supported by a fixing member attached to the wall surface of the fluid passage. The shaft member is fixed to the tubular member,
The fixing member has a shaft hole that receives the extension portion, and a fluid passage portion that is formed between the shaft hole and the wall surface of the fluid passage and penetrates in the direction of the fluid passage.
A concave portion is formed in a portion of the extension portion of the shaft-shaped member received in the shaft hole of the fixing member, and a pin inserted so as to extend from the side surface of the fixing member in a direction crossing the fixing member is formed in the concave portion. By engaging, the shaft-like member can be fixed in the axial direction with respect to the fixing member.

In another specific example,
A tubular member having a fluid passage opening at one end of the joint body;
A shaft-shaped member that is disposed so as to extend a predetermined length along the axis of the fluid passage at the opening of the fluid passage of the tubular member, and is fixed to the tubular member;
The valve member is cylindrical, and in the forward movement position, it is fitted to a cylindrical fluid passage portion that forms a part of the fluid passage formed between the shaft-like member and the inner peripheral surface of the cylindrical member. Then, the fluid passage is closed, and in the retracted position, the fitting with the cylindrical fluid passage portion is released to open the fluid passage,
The shaft-shaped member has an extension extending rearwardly from the shaft-shaped member in the fluid passage, and the extension is supported by a fixing member attached to the wall surface of the fluid passage. It is designed to be fixed against
The fixing member has a shaft hole that receives the extension portion, and a fluid passage portion that is penetrated along the axial direction of the fluid passage between the shaft hole and the wall surface of the fluid passage.
A concave portion is formed in a portion of the extension portion of the shaft-shaped member received in the shaft hole of the fixing member, and a pin inserted so as to extend from the side surface of the fixing member in a direction crossing the fixing member is formed in the concave portion. By engaging, the shaft-like member can be fixed to the fixing member in the axial direction.
In this case, the recess can be an annular groove formed on the outer peripheral surface of the portion received in the shaft hole of the fixing member in the extension portion of the shaft-shaped member.

Hereinafter, it explains per embodiment of a joint member concerning the present invention.
FIG. 1 shows a pipe joint 12 including a joint member (male joint member) 10 according to the present invention, in which the male joint member 10 and the female joint member 14 are separated from each other. 2 shows a state where the male joint member 10 and the female joint member 14 are connected, and FIG. 3 shows a state when the connection of FIG. 2 is released.

The male joint member 10 has a joint body 20 having a fluid passage 18 and a valve member 22 for opening and closing the fluid passage.

  The joint body 20 is a tubular member comprising a tubular connecting portion 24 that is coupled to the female joint member 14 and an adapter 26 that is screwed to the tubular connecting portion and connected to a required conduit T. 28 and an opening portion of the fluid passage 18 (opened at the left end of the cylindrical member as viewed in FIG. 1) so as to extend a predetermined length along the axis of the fluid passage 18. The fluid passage 18 has a cylindrical shape between the shaft-shaped member 30 and the inner peripheral surface 28-1 of the tubular member 28. The shaft-like member 30 has an extension portion 30-1 extending rearward in the axial direction in the fluid passage 18 from the shaft-like member, and the extension portion is supported by a fixing member 34 attached to the wall surface of the fluid passage 18. Thereby, the shaft-like member 30 is fixed to the tubular member 28.

  As shown in detail in FIGS. 5 and 6, the fixing member 34 has a substantially disk shape, and has a shaft hole 34-1 that receives the extension 30-1 in the center, and the shaft hole 34-1 and the fixing member. A substantially circular fluid passage portion 34-2 that passes through the periphery of the member 34 in the axial direction of the fluid passage 18 is provided.

  An annular groove 30-3 is formed in a portion 30-2 received in the shaft hole 34-1 of the fixing member 34 in the extension 30-1 of the shaft-shaped member 30 (FIG. 4), and correspondingly, The fixing member 34 is provided with a pin hole 34-3 in a direction crossing the fixing member 34 from the side surface (right side surface in FIG. 6), and a pin 36 inserted into the pin hole 34-3 is provided. The annular member 30-3 of the extension 30-1 is engaged in the tangential direction, so that the shaft-shaped member 30 is fixed to the fixing member 34 in the axial direction.

  The valve member 22 has a cylindrical shape, and at the forward movement position shown in FIG. 1, a part of the fluid passage 18 formed between the outer peripheral surface of the shaft-shaped member 30 and the inner peripheral surface of the cylindrical member 28 is formed. The fluid passage 18 is closed by fitting into the cylindrical fluid passage portion 18-1, and the male joint member 10 is connected to the female joint member 14 as shown in FIG. On the other hand, when the retracted position is set, the fitting with the cylindrical fluid passage portion 18-1 is released and the fluid passage 18 is opened.

  A first seal ring 40 is provided near the front end edge of the inner peripheral surface of the cylindrical member 28, and a second seal ring 42 is provided near the rear end of the shaft member 30 behind the first seal ring 40. When the valve member 22 is in the forward position shown in FIG. 1, the valve member 22 is hermetically engaged with the outer peripheral surface and the inner peripheral surface of the valve member. As shown in FIG. 2, when the male joint member 10 is connected to the female joint member 14 and the valve member 22 is in the retracted position with respect to the tubular member 28, the valve member 22 is the first of these. In addition, the second seal rings 40 and 42 are spaced apart rearward.

  As shown in the drawing, the inner peripheral surface of the valve member 22 is provided with a taper portion 22-1 that gradually decreases in diameter from the front end edge toward the rear, and the inner diameter of the front end edge that is the maximum diameter in the taper portion. Is larger than the diameter of the second seal ring 42, and when the connection state of the female joint member and the female joint member shown in FIG. 2 is released to the release state shown in FIG. 2 is advanced from the retracted position shown in FIG. 2 toward the advanced position shown in FIG. At this time, since the valve member 22 is provided with the tapered portion 22-1 on the inner peripheral surface thereof, the valve member 22 moves forward without receiving much frictional resistance from the second seal ring 42, and the valve member 22 moves forward with respect to the first seal ring 40. The sliding starts almost simultaneously with the two seal rings and returns to the advanced position in FIG.

  When the valve member 22 reaches the forward movement position shown in FIG. 1, the valve member 22 is tapered on the outer peripheral surface of the shaft member so that the valve member 22 and the outer peripheral surface of the shaft member 30 are in close contact with each other. A tapered portion 30-4 corresponding to the portion 22-1 is formed.

  The first and second seal rings 40 and 42 have a U-shaped or Y-shaped cross section. When the valve member 22 reaches the advanced position shown in FIG. It is oriented as shown in the figure so that the fluid in the internal fluid passage does not leak.

  The female joint member 14 includes an outer tubular member 50 for receiving the male joint member 10, an inner tubular member 52 that is concentrically fixed to the outer tubular member inside thereof, A valve member 54 that is displaceable in the axial direction in the inner cylindrical member 52, a radial through hole 50-1 provided in the outer cylindrical member 50, and a radial displacement in the through hole 50-1. A spherical locking element 56 that can be accommodated, a support sleeve 58 that supports the locking element 56 when the joint member shown in FIG. 1 is not connected, and a spring 60 that urges the sleeve 58 to the advanced position in FIG. And a spring 62 for urging the valve member 54 to the forward position shown in FIG.

  The inner cylindrical member 52 has a cross-sectional shape corresponding to the cylindrical fluid passage portion 18-1 in the fluid passage 18 of the male joint member 10, and the valve member 54 has a cross-sectional shape of When the male joint member 10 and the female joint member 14 are connected, the valve member 22 of the male joint member 10 is female. The inner tubular member of the mold joint member 14 is pushed from the advanced position shown in FIG. 1 to the retracted position shown in FIG. 2, while the valve member 54 of the female joint member 14 is the shaft-like member 30 of the male joint member 10. By this, it is pushed from the forward movement position shown in FIG. 1 to the backward movement position shown in FIG. At this time, the support sleeve 58 of the female joint member 14 is pushed in by the tubular member 28 of the male joint member 10, and the annular locking recess 28-2 formed on the outer peripheral surface of the tubular member 28 is a female joint. When the locking position of the member 14 is aligned with the locking element 56 in the radial direction, the locking element 56 engages with the annular locking recess 28-2. When the locking element 56 is engaged with the annular locking recess 28-2, the spring-operated operating sleeve 64 advances from the position shown in FIG. 1 to the position shown in FIG. The lock 56 is moved outward in the radial direction so that the male joint member 10 does not come out of the female joint member 14.

  As can be seen from the above embodiments, in the joint member according to the present invention, the valve member is connected to the seal ring that is sealingly engaged when the joint member is not connected. Since it is in a separated state, the valve member and the seal ring do not stick to each other even if the connection is performed for a long period of time. Thus, the sealing engagement with the seal ring can be performed to prevent fluid leakage.

It is a longitudinal cross-sectional view of the pipe joint which concerns on this invention, and has shown the state by which the male coupling member and the female coupling member are not connected. In the same pipe joint, a male joint member and a female joint member are connected. In the same pipe joint, a state immediately after the connection between the male joint member and the female joint member is released is shown. It is a side view of a shaft-shaped member. In the side view of the fixing member, the upper half portion is shown as a cross section. FIG. 6 is a cross-sectional view taken along line AA in FIG. 5 and shows a relationship between the fixing member and a pin for fixing the shaft-like member to the fixing member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Male joint member 12 Pipe joint 14 Female joint member 18 Fluid passage 18-1 Fluid passage part 20 Joint main body 22 Valve member 22-1 Taper part 24 Tubular connection part 26 Adapter 28 Tubular member 28-1 Inner peripheral surface 28-2 annular locking recess 30 shaft member 30-1 extension 30-2 portion 30-3 annular groove 30-4 taper portion 34 fixing member 34-1 shaft hole 34-2 fluid passage portion 34-3 pin hole 36 Pin 40 First seal ring 42 Second seal ring 44 Compression spring 50 Outer cylindrical member 50-1 Radial through hole 52 Inner cylindrical member 54 Valve member 56 Locking element 58 Support sleeve 60, 62 Spring 64 Operation sleeve T Conduit

Claims (7)

One joint member in a pipe joint composed of a female joint member and a male joint member connected to each other,
A coupling body having a fluid passage;
A forward position that closes the fluid passage when not connected to the other joint member, and a backward position that is pushed by the other joint member when connected to move backward relative to the joint body to open the fluid passage. A valve member movable between and
A spring for urging the valve member to the forward position;
A seal ring provided on the joint body for sealing between the side surface of the valve member and the joint body when the valve member is in the advanced position;
When the valve member is in the retracted position, the valve member is separated from the seal ring, and when the connection with the other joint member is released, the valve member returns to the advanced position while sliding with respect to the seal ring by the spring. A joint member for a pipe joint, characterized in that A cylindrical member having the fluid passage opened at one end of the joint body;
A shaft-shaped member that is disposed to extend a predetermined length along the axis of the fluid passage at the opening portion of the fluid passage of the tubular member, and is fixed to the tubular member;
The valve member is cylindrical, and in the forward movement position, a cylindrical fluid passage portion forming a part of the fluid passage is formed between the shaft member and the inner peripheral surface of the cylindrical member. And the fluid passage is closed, and in the retracted position, the fluid passage is opened by releasing the fitting with the cylindrical fluid passage portion.
The seal ring is a first seal ring provided near the front end edge of the inner peripheral surface of the cylindrical member, and a second seal ring provided near the rear end of the shaft member behind the first seal ring. A seal ring,
2. The joint member according to claim 1, wherein the inner peripheral surface of the valve member has a tapered portion whose diameter gradually decreases from the front end edge toward the rear. The joint member according to claim 2, wherein an inner diameter of a front end edge having a maximum diameter in the tapered portion is substantially equal to or greater than an outer diameter of the second seal ring.   The diameter of the front end portion of the shaft-like member gradually decreases toward the rear, and when the valve member reaches the advanced position, the tapered portion engages with the front end portion of the shaft-like member. The joint member according to claim 2, wherein the joint member is configured as described above. The shaft-like member has an extension extending rearwardly from the shaft-like member in the fluid passage, and the extension is supported by a fixing member attached to a wall surface of the fluid passage, thereby the shaft-like member. Is fixed to the cylindrical member,
The fixing member has a shaft hole that receives the extension, and a fluid passage portion that penetrates between the shaft hole and the wall surface of the fluid passage in the axial direction of the fluid passage.
A concave portion is formed in a portion of the extension portion of the shaft-like member that is received in the shaft hole of the fixing member, and a pin inserted so as to extend from the side surface of the fixing member in a direction crossing the fixing member is provided. The joint member according to any one of claims 2 to 4, wherein the shaft member is fixed to the fixing member in the axial direction by engaging with the recess. A cylindrical member having the fluid passage opened at one end of the joint body;
A shaft-shaped member that is disposed to extend a predetermined length along the axis of the fluid passage at the opening portion of the fluid passage of the tubular member, and is fixed to the tubular member;
The valve member is cylindrical, and in the forward movement position, a cylindrical fluid passage portion forming a part of the fluid passage is formed between the shaft member and the inner peripheral surface of the cylindrical member. And the fluid passage is closed, and in the retracted position, the fluid passage is opened by releasing the fitting with the cylindrical fluid passage portion.
The shaft-like member has an extension extending rearwardly from the shaft-like member in the fluid passage, and the extension is supported by a fixing member attached to a wall surface of the fluid passage, thereby the shaft-like member. Is fixed to the cylindrical member,
The fixing member has a shaft hole for receiving the extension, and a fluid passage portion penetrating in the axial direction of the fluid passage between the shaft hole and the wall surface of the fluid passage.
A recess is formed in a portion of the extension of the shaft-like member that is received in the shaft hole of the fixing member, and a pin inserted so as to extend from the side surface of the fixing member in a direction crossing the fixing member The joint member according to claim 1, wherein the shaft-shaped member is fixed to the fixing member in the axial direction by engaging with the recess. 6. The joint member according to claim 5, wherein the concave portion is an annular groove formed on an outer peripheral surface of a portion of the extension portion of the shaft-like member that is received in the shaft hole of the fixing member. .

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