JP2009127820A - Pipe fitting with valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe fitting with a valve capable of reducing a pressure loss by relatively increasing a diameter reduction angle on the base end side to increase the area of a flow passage near a diameter reduction start position. <P>SOLUTION: In this pipe fitting with a valve, a valve 30 having a head part 31, a valve supporter A for supporting the valve 30 movably in the axial direction, a biasing member 8 for biasing the valve 30 to the front end, and a streamlining member 6 having a diameter divergent toward the front end are disposed in the flow passage L2 formed by the inner peripheral surface 21a of a cylindrical body 21. A diameter reduced part 22 is formed in the inner peripheral surface 21a. The diameter reduced part 22 is so formed that the diameter reduction angle By on the base end side is relatively large and the diameter reduction angle Bx on the front end side is relatively small in the axial direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a valve-equipped pipe joint called a coupler, for example.

2. Description of the Related Art Conventionally, a valve-equipped pipe joint called a coupler or the like is known as a pipe joint used in hydraulic equipment or the like and through which a fluid such as water or oil flows (see, for example, Patent Document 1). As shown in the same document (hereinafter, the reference numerals used in the same document are shown in parentheses), this valve-attached pipe joint is a male joint (22) called a nose and a female called a body. It is comprised by the combination with a coupling (21).
More specifically, the male joint (22) has a cylindrical male cylinder called a nose body and the inner peripheral surface of the male cylinder forms a flow path. Similarly, the female joint (21) has a cylindrical female cylinder called body body and the inner peripheral surface of the female cylinder also forms a flow path. The male cylinder and the female cylinder thus formed are, for example, screwed together or fitted in the opening formed on the inner peripheral surface of the distal end of the female cylinder, It can fix and connect by appropriate methods, such as utilizing such a connection mechanism.

The male joint (22) and the female joint (21) are each provided with a valve called a poppet valve or the like in the flow path. This valve includes a tapered (conical) head (24 ₁ , 24 ₂ ) called a poppet provided with a sealing material (40) made of an elastic ring or the like, and the head (24 ₁ , 24 ₂ ). And a shaft portion having a smaller diameter than the head portions (24 ₁ , 24 ₂ ) extending from the base end surfaces (24 ₁₁ , 24 ₂₁ ) (that is, extending to the base end side).
Furthermore, the male joint (22) and the female joint (21) are provided with a valve support (26) called a poppet guide, a blade portion, or the like in the flow path. The valve support (26) is fixed to the inner peripheral surface of the cylindrical body, and supports the shaft portion of the valve so as to be movable in the axial direction. The valve support (26) is hooked on an annular retaining ring (25) fitted on the inner peripheral surface of the cylinder so that the inner peripheral portion protrudes from the inner peripheral surface. In addition, this latching is performed using, for example, a C-type retaining ring, spiro locks, or the like, or a projecting portion formed by reducing the diameter of a part of the inner peripheral surface. . By this latching, the valve support (26) is fixed so as not to move toward the base end side with respect to the cylindrical body.
Furthermore, the male joint (22) and the female joint (21) are provided with an urging member (27) made of a coiled spring, a spring or the like in the flow path. The urging member (27) is interposed between the valve support (26) and the base end faces (24 ₁₁ , 24 ₂₁ ) of the heads (24 ₁ , 24 ₂ ), and accordingly, the head (24 ₁ , 24 ₂ ) is urged toward the distal end side by the urging member (27). And by this urging | biasing, in the state (state where insertion was removed) where the front-end | tip part of a male cylinder is not inserted in the said opening part of a female cylinder, it will be in the state by which the flow path was blocked. More specifically, a diameter-reduced portion (28) projecting toward the axial center side (inward) is provided on the inner peripheral surface of the cylinder forming the flow path. When the heads (24 ₁ , 24 ₂ ) are urged and move to the tip side, the inner peripheral surface of the reduced diameter portion (28) and the tapered surfaces of the heads (24 ₁ , 24 ₂ ) come into contact with each other. The flow path is blocked by this contact. Then, this in order to reliably prevent the leakage of fluid from the contact portion, the on the inner peripheral surface of the reduced diameter portion (28), a head (24 _1, 24 ₂₎ to a provided sealing member (40) Also comes into contact.

On the other hand, in a state where the tip of the male cylinder is fitted into the opening of the female cylinder, both flow paths are in communication. More specifically, first, in the disengaged state, the distal end portion (24 ₁₀ ) of _one head portion (24 ₁ ) is formed of the reduced diameter portion (28) formed on the inner peripheral surface of the male cylindrical body. Projecting from the distal end surface, the distal end (24 ₂₀ ) of the other head (24 ₂ ) projects from the distal end surface of the reduced diameter portion (28) formed on the inner peripheral surface of the female cylinder. Further, in the fitted state, the front end surface of the reduced diameter portion (28) formed on the inner peripheral surface of the male cylinder and the front end surface of the reduced diameter portion (28) formed on the inner peripheral surface of the female cylinder are formed. At the end, it is positioned. Therefore, in the fitted state, both heads (24 ₁ , 24 ₂ ) are pressed against each other, and both the heads (24 ₁ , 24 ₂ ) are separated from the reduced diameter portion (28) by this pressing, and thus both flow paths communicate with each other. .
Further, in the valve-equipped pipe joint configured as described above, a rectifying member (1) called a rectifying ring or the like is disposed in each of the both flow paths. The rectifying member (1) is inserted the shank of the biasing member (27) and valve, and radially expands depending on toward the tip end from the base end side, the diameter of the tip edge head (24 _1, It is close to the maximum diameter of 24 ₂ ). This arrangement of the rectifying member (1) prevents the fluid flowing in the flow path from colliding with the base end faces (24 ₁₁ , 24 ₂₁ ) of the heads (24 ₁ , 24 ₂ ), thereby reducing pressure loss. It is going to plan. Regarding this rectifying member (1), for example, Patent Document 2 is also helpful.
The valve-equipped pipe joint configured as described above can easily connect the male joint (22) and the female joint (21), and the pressure loss can be reduced by the arrangement of the rectifying member (1). However, further reduction of pressure loss is required, and the proposal is expected.
JP-A-8-320092 JP-A-53-116523

  The main problem to be solved by the present invention is to provide a valve-equipped pipe joint with reduced pressure loss.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A male cylinder whose inner peripheral surface forms a flow path, and a female cylinder whose inner peripheral surface forms a flow path and into which a tip of the male cylinder is fitted,
In each of the two flow paths,
A valve having a head portion and a shaft portion having a smaller diameter than the head portion extending from the base end surface of the head portion, and a valve support fixed to the inner peripheral surface and movably supporting the shaft portion in the axial direction A biasing member interposed between the valve support and the base end surface of the head and biasing the head toward the distal end; the biasing member and the shaft portion are inserted; A rectifying member whose diameter increases as it goes to the side, and
In the state where the insertion is released, the head is urged toward the tip side and comes into contact with the reduced diameter portion provided on the inner peripheral surface, and the contact closes the flow path, and the insertion In the state, the two heads are pressed against each other, the both heads are separated from the reduced diameter portion by the pressing, the two flow passages communicate with each other,
The reduced diameter portion is related to the axial direction.
The diameter reduction angle on the proximal side is relatively large, and the diameter reduction angle on the distal end side is relatively small.
A valve-equipped fitting.

[Invention of Claim 2]
The difference between the diameter reduction angle on the proximal end side and the diameter reduction angle on the distal end side is 5 to 60 °.
The valve-equipped pipe joint according to claim 1.

[Invention of Claim 3]
3. The valve-equipped pipe joint according to claim 1, wherein, in the inserted state, the diameter reduction start position of the diameter reduction part is set to a tip side from a position corresponding to the maximum diameter of the head part.

  According to the present invention, it is a valved joint with reduced pressure loss.

Next, an embodiment of the present invention will be described.
As shown in FIGS. 1 and 2, the valve-equipped pipe joint 1 of the present embodiment is basically composed of the same members as the valve-equipped pipe joint described in Patent Document 1.
That is, the valve-equipped pipe joint 1 of this embodiment is configured by a combination of a male joint 2 called a nose and a female joint 3 called a body. And the male joint 2 has the cylindrical male cylinder 11 called a nose main body etc., and the internal peripheral surface 11a of this male cylinder 11 forms the flow path L1. Similarly, the female joint 3 has a cylindrical female cylinder 21 called a body body, and an inner peripheral surface 21a of the female cylinder 21 forms a flow path L2.

  The male cylindrical body 11 and the female cylindrical body 21 thus configured are, for example, screwed while fitting the distal end portion 11A of the male cylindrical body 11 into the opening formed by the inner peripheral surface 21A of the distal end portion of the female cylindrical body 21. Alternatively, they can be fixed and connected by an appropriate method such as using the connecting mechanism 70.

  In addition, the male joint 2 and the female joint 3 are each provided with a valve 30 called a poppet valve or the like in the flow paths L1 and L2. The valve 30 has a tapered (conical) head portion 31 called a poppet and a head portion extending from the base end surface 31a (see FIG. 2) of the head portion 31 (that is, extending to the base end side). The shaft portion 32 has a smaller diameter than the shaft 31.

  Furthermore, the male joint 2 and the female joint 3 are provided with a support A for the valve 30 called a poppet guide, a blade portion, or the like in the flow paths L1 and L2. The valve support A is fixed to the inner peripheral surfaces 11a and 21a of the cylinders 11 and 21, and supports the shaft portion 32 of the valve 30 so as to be movable in the axial direction. The valve support A is latched by an annular retaining ring 9 fitted into the inner peripheral surfaces 11a and 21a of the cylinders 11 and 21 so that the inner peripheral portion protrudes from the inner peripheral surfaces 11a and 21a. Has been. This latching can be performed by using, for example, a C-type retaining ring, spiro locks, or the like, or by using a projecting portion in which a part of the inner peripheral surfaces 11a and 21a is reduced in diameter. By this latching, the valve support A is fixed to the cylinders 11 and 21 so as not to move to the base end side.

  Further, the male joint 2 and the female joint 3 are provided with urging members 8 made of coiled springs, springs, etc. in the flow paths L1, L2. The urging member 8 is interposed between the valve support A and the base end surface 31 a of the head portion 31. Therefore, the head portion 31 is urged toward the distal end side by the urging member 8. And by this energization, in the state where tip part 11A of male cylinder 11 is not inserted in the above-mentioned opening of female cylinder 21 (state where insertion was removed), flow paths L1 and L2 were blocked. It becomes a state. More specifically, the inner peripheral surfaces 11a and 21a of the cylinders 11 and 21 that form the flow paths L1 and L2 are provided with reduced diameter portions 12 and 22 that protrude toward the axial center side (inward). . When the head 31 is urged and moves to the tip side, the inner peripheral surfaces (11a, 21a) of the reduced diameter portions 12, 22 and the tapered surface 31b (see FIG. 2) of the head 31 come into contact with each other. The flow paths L1 and L2 are blocked by this contact.

  On the other hand, when the distal end portion 11A of the male cylindrical body 11 is fitted into the opening of the female cylindrical body 21, both the flow paths L1 and L2 are in communication with each other. More specifically, first, in the disengaged state, the distal end portion of the reduced diameter portion 12 formed on the inner peripheral surface 11a of the male cylindrical body 11 is formed at the distal end portion of the head portion 31 disposed in the flow path L1. The tip end portion of the head 31 disposed in the flow path L <b> 2 protrudes from the tip end surface of the reduced diameter portion 22 formed on the inner peripheral surface 21 a of the female cylindrical body 21. Further, in the fitted state, the distal end surface of the reduced diameter portion 12 formed on the inner peripheral surface 11 a of the male cylindrical body 11 and the distal end surface of the reduced diameter portion 22 formed on the inner peripheral surface 21 a of the female cylindrical body 21 are formed. At the end, it is positioned. Therefore, in the inserted state, both heads 31 are pressed against each other, the both heads 31 are separated from the reduced diameter portions 12 and 22 by this pressing, and both flow paths L1 and L2 are communicated.

  Furthermore, in the valve-equipped pipe joint 1 configured as described above, a rectifying member 6 called a rectifying ring or the like is disposed in each of the flow paths L1 and L2. The rectifying member 6 has a through hole penetrating in the axial direction in the axial center portion, and the urging member 8 and the shaft portion 32 of the valve 30 are inserted through the through hole. Further, the rectifying member 6 has a diameter that increases from the proximal end side toward the distal end side, and the diameter of the distal end edge is made closer to the maximum diameter of the head 31. Therefore, the arrangement of the rectifying member 6 prevents the fluid flowing in the flow paths L1 and L2 from colliding with the base end face 31a of the head portion 31, thereby reducing the pressure loss.

  On the other hand, in this embodiment, the connection method between the male joint 2 and the female joint 3 is not particularly limited. For example, the male cylinder body 11 and the female cylinder body 21 may be fixed and connected by, for example, screwing. it can. However, in the present embodiment, from the viewpoint of easy connection, a method of fixing and connecting using the connecting mechanism 70 is adopted. The connecting mechanism 70 has a connecting cylinder 71 called a collar or the like that is coaxially and circumscribed at the tip of the female cylinder 21. The connecting cylinder 71 is thick at the distal end and thin at the proximal end, and a biasing member made of a coiled spring, spring, or the like between the inner peripheral surface of the thin portion and the outer peripheral surface of the female cylinder 21. 72 is interposed. The urging member 72 is engaged with the step portion between the thick portion and the thin portion of the connecting cylinder 71 and urges the connecting cylinder 71 toward the tip side. However, a projecting member 73 composed of an annular ring or a plurality of ball members is fitted on the outer peripheral surface of the distal end portion of the female cylinder 21 so as to protrude from the outer peripheral surface. Therefore, when the thick part of the connecting cylinder 71 engages with the protruding member 73, the movement of the connecting cylinder 71 to the front end side due to the biasing is limited, and this state is usually in this state. On the other hand, the coupling mechanism 70 includes a ball member 75, and the ball member 75 is disposed in a hole 76 formed in the distal end portion of the female cylinder 21. The ball member 75 is normally covered with the inner peripheral surface of the thick portion of the connecting cylinder 71 and is prevented from moving outward. Further, the inner diameter of the hole 76 is smaller than the diameter of the ball member 75, and the ball member 75 is immovable while protruding from the inner peripheral surface 21 </ b> A of the distal end portion of the female cylinder 21. In this embodiment, a plurality of ball members 75 and holes 76 are provided at appropriate intervals in the circumferential direction of the female cylinder 21.

  When the male joint 2 and the female joint 3 are connected using the connecting mechanism 70 as described above, first, the connecting cylinder 71 is moved (slid) to the proximal end side, and the ball member 75 is moved outward. It can be moved. Next, in this state, the distal end portion 11 </ b> A of the male cylindrical body 11 is fitted into the opening formed on the inner peripheral surface 21 </ b> A of the distal end portion of the female cylindrical body 21. At the time of this insertion, since the ball member 75 can move outward, the ball member 75 does not hinder the insertion. By this insertion, as shown in FIG. 2, the distal end surface of the reduced diameter portion 12 formed on the inner peripheral surface 11 a of the male cylindrical body 11 and the reduced diameter portion 22 formed on the inner peripheral surface 21 a of the female cylindrical body 21. When the front end surface comes into contact with the front end surface, the ball member 75 is fitted into a recess 77 formed on the outer peripheral surface of the front end portion 11A of the male cylindrical body 11. In this state, if the movement of the connecting cylinder 71 to the proximal end is stopped, the connecting cylinder 71 is moved to the distal end side by the urging member 72, covers the ball member 75, and the outside of the ball member 75. The movement to the direction is made impossible. In this way, the ball member 75 and the recess 77 are engaged with each other, the male joint 2 and the female joint 3 are fixed, and the connection is completed.

  On the other hand, in this embodiment, an annular groove extending in the circumferential direction is formed on the inner peripheral surface 21A of the distal end portion of the female cylinder 21, and a sealing material 4 made of an O-ring or the like is embedded in the annular groove. . Thereby, in the inserted state, the inner peripheral surface of the sealing material 4 and the outer peripheral surface of the distal end portion 11A of the male cylindrical body 11 abut, and the outer peripheral surface of the distal end portion 11A of the male cylindrical body 11 and the inner end portion of the female cylindrical body 21 are in contact. The fluid is prevented from leaking from between the peripheral surface 21A. On the other hand, in a state where the insertion is removed, as shown in FIG. 1, the inner peripheral surfaces of the reduced diameter portions 12 and 22 and the tapered surface 31b of the head portion 31 come into contact with each other. Is blocked. In this embodiment, in order to make the blockage of the flow paths L1 and L2 more complete, an annular groove is formed along the circumferential direction, particularly in the maximum diameter portion of the tapered surface 31b of the head portion 31. A sealing material 5 is embedded in the annular groove. The sealing material 5 can be formed by, for example, an O-ring or by baking a rubber material as disclosed in JP-A-2006-105285.

  Next, the valve support A of the present embodiment will be described. In addition, the valve support A can be provided with the same form in both the flow path L1 and the flow path L2, and the case where it is provided in the flow path L1 will be described below as an example.

  As shown in FIGS. 3 and 4, the valve support A of the present embodiment is mainly configured by a shaft passing part A <b> 1, a bridge part A <b> 2, and a base part A <b> 3. The shaft-passing portion A1 has a shape along the circumferential surface of the shaft portion 32 constituting the valve 30 with respect to the cross-sectional direction of the flow path L1, for example, in the present embodiment in which the shaft portion 32 has a substantially circular cross section. It is arcuate. In this embodiment, two shaft-passing portions A1 are provided so as to face each other, and the shaft portion 32 is enclosed by these two. Thereby, the axial part 32 is supported so that a movement to an axial direction is possible. On the other hand, the bridge portion A2 extends from both end portions A1a of the shaft passing portion A1 to the inner peripheral surface 11a of the cylindrical body 11, and is particularly linear in this embodiment. Further, the base A3 is connected to the distal end A2a of the adjacent bridging portion A2 extending from the mutually adjacent shaft passing portions A1, and the shape along the inner peripheral surface 11a, that is, the inner peripheral surface 11a is substantially true in cross section. In the present embodiment, which is circular, it has an arc shape. In this way, the connecting portion A2 is connected to the shaft portion A1 and the base portion A3, whereby the force received by the shaft portion A1 from the shaft portion 32 is transmitted to the base portion A3 and further to the inner peripheral surface 11a. Therefore, the force from the shaft portion 32 is more directly transmitted to the inner peripheral surface 11a (if the force is not transmitted directly, the inner peripheral surface 11a has no movement even if the moving direction of the shaft portion 32 is inclined with respect to the axial direction). There is a possibility that the movement in the tilted state will not be resolved without being transmitted.) It is preferable that the transfer portion A2 extends in the radial direction of the flow path L1, and particularly extends linearly. When the transfer portion A2 is linear, there is an effect that the material cost is reduced and an effect that the pressure loss is further reduced. Further, from the viewpoint of the stability of the valve support A, it is preferable that the length of the base A3 is long. The length of the base portion A3 is proportional to the central angle Z of the transfer portion A2 connected to the one base portion A3. Therefore, when the central angle Z is increased, the valve support A is stabilized, but on the other hand, the material cost and the pressure loss are also increased. Therefore, from the viewpoint of these balances, for example, the central angle Z is preferably set to 15 to 180 °, and more preferably set to 60 ° as in the illustrated example.

  On the other hand, in the valve support A of the present embodiment, the shaft passing part A1, the transfer part A2, and the base part A3 are all plate-like in which the cross-sectional direction of the flow path L1 is thin. Thereby, as apparent from FIG. 3, the pressure loss of the fluid passing through the flow path L1 is significantly reduced. In addition, the valve support A can be manufactured by bending a flat plate or pipe, cutting, or the like, and the manufacturing cost is reduced. Furthermore, the length of the valve support A is simply increased by increasing the length V of the valve support A (meaning the length based on the axial direction of the shaft portion 32). The integrated strength of the portion A1, the spanning portion A2, and the base portion A3 is also included.) And stability (for example, the stability with respect to the inner peripheral surface 11a and the point that the shaft portion 32 can be supported stably). Can be improved. Of course, the length V of the valve support A is also influenced by the position of the retaining ring 9. For example, when the retaining ring 9 is located closer to the base end than in the conventional valve fitting, the valve support A can be adapted by increasing the length V.

  When a comparative test was performed between the valve support A of the present embodiment and the conventional valve support, it was found that the pressure loss can be reduced by about 44% according to the valve support A of the present embodiment.

  In the above, the plate shape is not limited to a flat spread state, that is, a flat plate shape, and includes, for example, a state where the plate is bent or bent in the middle. Moreover, the raw material of the valve support A is not specifically limited, For example, SUS303,304 etc. can be used.

  The valve support according to the present embodiment is not limited to the valve support A described above, and a known valve support can be used as appropriate. However, the use of the valve support A is recommended from the viewpoint of reducing the pressure loss, which is a problem of this embodiment.

  Next, the diameter-reduced portions 12 and 22 of the inner peripheral surfaces 11a and 21a of the cylindrical bodies 11 and 21 forming the flow paths L1 and L2 of the present embodiment will be described in detail. In addition, although the following forms are applicable to both the male joint 2 (inner peripheral surface 11a) and the female joint 3 (inner peripheral surface 21a), below, the case where it applies to the female joint 3 is demonstrated to an example. To do.

  As shown in (1) of FIG. 5, the diameter-reduced portion 22 of this embodiment has a relative diameter-reduced angle (By) relative to the base end side (from the diameter-reduction starting position Y2 to the diameter-changing change position Y3) with respect to the axial direction. In particular, the diameter reduction angle (Bx) on the tip side (from the diameter reduction changing position Y3 to the diameter reduction end position Y4) is relatively small. In this regard, in the vicinity of the diameter reduction start position Y2, the area of the flow path L2 is narrowed and the pressure loss of the fluid is likely to occur. However, if the diameter-reduction angle (By) on the base end side is relatively large, the area of the flow path L2 in the vicinity of the diameter-reduction starting position Y2 is increased, and the pressure loss is reduced. Further, as shown in (1) and (2) of FIG. 5, the fluid that has collided with the reduced diameter portion 22 on the proximal end side flows toward the head 31 as indicated by reference numeral N1. The fluid that collided with the fluid collides with the reduced diameter portion 22 on the distal end side, as indicated by reference numeral N2. Therefore, when the diameter-reduction angle (Bx) on the tip side is relatively small, the pressure loss (hereinafter referred to as “tip-side pressure loss”) when the fluid collides with the diameter-reduced portion 22 on the tip side is reduced. Is done. Of course, in this embodiment, the pressure loss (hereinafter referred to as “base end side pressure loss”) when the fluid collides with the reduced diameter portion 22 on the base end side becomes large, but the tip side pressure loss and the rear end side pressure are increased. The ratio to the loss can be adjusted as appropriate by, for example, changing the diameter reduction position Y3 in the axial direction, the diameter reduction angles Bx, By, and the like. Therefore, if the shape, flow velocity, flow rate, and the like of the head 31 are also taken into consideration, the pressure loss as a whole can be reduced by adjusting the pressure loss ratio. In particular, when the viewpoint of expanding the area of the flow path L2 is included, it is preferable to change the diameter reduction angle as in the present embodiment. At this time, the difference (By−Bx) between the proximal diameter reduction angle (By) and the distal diameter reduction angle (Bx) is preferably 5 to 60 °, more preferably 10 to 30 °. If the angle difference is less than 5 °, the flow path L2 is narrow, the fluid resistance increases, and the pressure loss is not reduced. On the other hand, if the angle difference exceeds 60 °, the flow path expands too rapidly, the flow velocity decreases, and the fluid becomes clogged, so that the pressure rises and pressure loss occurs.

  Moreover, in the above, as shown in FIG. 5 (2), the diameter reduction start position Y2 of the diameter reduction part 12 in the fitted state is greater than the position Y1 corresponding to the maximum diameter of the head 31 (see Patent Document 1 above). However, it is preferably not the base end side but the tip end side as shown in FIG. 5 (1). As shown in (2) of FIG. 5, when the diameter reduction start position Y2 is the base end side of the maximum diameter equivalent position Y1, the distal diameter side reduced diameter portion 22 (particularly the maximum diameter equivalent position Y1) The fluid colliding with the diameter reduction start position Y2 is directed to the vicinity of the maximum diameter portion of the head 31 and to the boundary between the head 31 and the rectifying member 6 as indicated by reference numeral N3, and turbulent flow is generated. There is a risk. The generation of turbulence causes pressure loss.

  Furthermore, in this embodiment, as shown in (3) of FIG. 5, chamfering is performed at positions C1 to C5 where the diameter of the inner peripheral surface 21a of the female cylindrical body 21 changes and corners C7 and C8 of the rectifying member 6. It is more preferable that These chamfers suppress the generation of turbulent flow, but one turbulent flow may promote (enlarge) the next turbulent flow. Can be greatly reduced.

  The present invention is applicable, for example, as a valved pipe joint called a coupler.

It is a half sectional view showing the state before connection of the pipe joint with valve concerning an embodiment. It is a half sectional view showing the state after connection of the pipe joint with valve concerning an embodiment. It is a top view which shows the valve support tool which concerns on embodiment. It is a front view which shows the valve support tool which concerns on embodiment. It is a figure for demonstrating the shape of the cylinder surrounding surface which concerns on embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Pipe joint with a valve, 2 ... Male joint, 3 ... Female joint, 4, 5 ... Sealing material, 6 ... Rectifying member, 8 ... Energizing member, 9 ... Retaining ring, 11 ... Male cylinder body, 12, 22 ... Diameter-reduced part, 21. Female cylinder, 30. Valve, 31. Head, 32. Shaft part, 70 ... Connection mechanism, 71 ... Connection cylinder, 72 ... Biasing member, 73 ... Projection member, 75 ... Ball Member, 76 ... hole, 77 ... recess, A ... valve support, A1 ... shaft passing part, A2 ... transit part, A3 ... base, L1, L2 ... flow path.

Claims (3)

A male cylinder whose inner peripheral surface forms a flow path, and a female cylinder whose inner peripheral surface forms a flow path and into which a tip of the male cylinder is fitted,
In each of the two flow paths,
A valve having a head portion and a shaft portion having a smaller diameter than the head portion extending from the base end surface of the head portion, and a valve support fixed to the inner peripheral surface and movably supporting the shaft portion in the axial direction A biasing member interposed between the valve support and the base end surface of the head and biasing the head toward the distal end; the biasing member and the shaft portion are inserted; A rectifying member whose diameter increases as it goes to the side, and
In the state where the insertion is released, the head is urged toward the tip side and comes into contact with the reduced diameter portion provided on the inner peripheral surface, and the contact closes the flow path, and the insertion In the state, the two heads are pressed against each other, the both heads are separated from the reduced diameter portion by the pressing, the two flow passages communicate with each other,
The reduced diameter portion is in the axial direction.
The diameter reduction angle on the proximal side is relatively large, and the diameter reduction angle on the distal end side is relatively small.
A valve-equipped fitting. The difference between the diameter reduction angle on the proximal end side and the diameter reduction angle on the distal end side is 5 to 60 °.
The valve-equipped pipe joint according to claim 1.   3. The valve-equipped pipe joint according to claim 1, wherein, in the inserted state, the diameter reduction start position of the diameter reduction part is set to a tip side from a position corresponding to the maximum diameter of the head part.

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