JP6236521B2 - Pipe fitting - Google Patents

Description

  Embodiments of the present invention relate to a pipe joint.

  A pipe joint that connects a pair of male and female joint members and connects pipes has a valve for opening and closing a flow path inside the tubular joint member. There is a mechanism that prevents internal fluid from leaking when the joint member is attached or detached. For example, both joint members have a seal material, which is an elastic body made of rubber or the like, in the valve, so that no fluid leaks even when connected and disconnected.

  FIG. 4 is a diagram showing a configuration of a pipe joint having a conventional valve. FIG. 4A is a cross-sectional view of a male joint member (male member). FIG. 4B is a cross-sectional view of a female joint member (female member). FIG. 4C is a perspective view of the valve 450 and the valve stop 411. FIG. 4D is a diagram illustrating a state in which the female member and the male member are coupled to each other.

  4A and 4C, the male member 410 includes a male member main body 415, an adapter 416, an adapter O-ring 417, a valve stop 411, a valve spring 412, and a valve 450. The valve 450 includes a valve main body 413 and a valve seal 414. The valve seal 414 is made of an elastic material such as rubber and is attached to the tubular valve body 413. The valve 450 is inserted into the male member body 415 while being pressed by a valve spring 412 attached to the valve stop 411, and is fixed by an adapter 416 equipped with an adapter O-ring 417. As shown in FIG. 4C, the tubular valve stop 411 has a plurality of holes 418 for fluid movement and a hole 419 that serves as a guide when the valve 450 moves.

  4B includes a valve stop 421, a valve spring 422, a valve 460, a valve seal closing member (hereinafter referred to as a pintle) 423, and a snap ring 426. The valve 460 includes a valve main body 425, a valve seal 424, and a V seal 429. The V seal 429 is made of an elastic material such as rubber and is attached to the valve main body 425. The valve 460 is in contact with the pintle 423 while being pressed by a valve spring 422 attached to the valve stop 421. The pintle 423 is fixed to the valve stop 421 by a snap ring 426. The valve stop 421 is fixed by a female member main body 427 and an adapter 428.

  FIG. 4D is a view showing a state in which the female member 420 and the male member 410 are combined. The elastic force of the pintle 423 of the female member 420, the valve seal 414 of the male member 410, and the valve spring 412 of the male member 410 is brought into contact with the V seal 425 to prevent fluid leakage in the flow path. The distal end portion of the male member main body 415 and the valve seal 424 of the female member 420 are brought into contact with each other by the elastic force of the valve spring 422 to prevent leakage of fluid in the flow path. Even when the female member 420 and the male member 410 are separated, fluid leakage is prevented by the three seal members until the female member 420 and the male member 410 are completely separated.

  The movement of the valve 450 on the male member side when the female member 420 and the male member 410 are attached / detached is performed using the hole 419 of the valve stop 411 as a guide. May incline and elastically contact the male member main body 415 to cause leakage. Since it is necessary to lengthen the valve stop 411 in order to prevent leakage, the pressure loss increases.

JP 2008-128285 A Japanese Patent Laid-Open No. 11-141775

  In a pipe joint that connects a pair of male and female joint members and connects pipes, a pipe joint having a small pressure loss is provided by changing the valve shape.

The pipe joint according to the embodiment is configured such that the cylindrical detachable portion of the cylindrical male member including the cylindrical detachable portion is inserted and fitted into the female member, and the flow path of the internal fluid in the cylindrical detachable portion. a pipe joint but formed, the male member and the female member is provided with a valve for holding the leakage prevention state of the internal fluid due to the elasticity of the I if during a single cylindrical attachment and detachment of the male member The valve of the male member and the female member are brought into contact with each other when the valve of the male member and the female member are in contact with each other in the process of inserting the portion into the hole of the female member and completing the fitting. The internal fluid is prevented from leaking between the valve and the male member, and the valve of the female member and the male member are brought into contact with each other. leakage of internal fluid is prevented, the valve of the male member, the male member A valve body having three or more fins which are guided by an inner peripheral surface and movable along the axial direction of the male member; and a valve seal provided at an end of the valve body on the female member side; wherein the said three or more fins, the are arranged along the axial direction of the male member Rutotomoni, the male member in slidable contact state over substantially the entire length to the inner peripheral surface of the male member The three or more fins that are guided in sliding contact with the inner peripheral surface of the member and are radially connected to each other at the radial center of the male member over substantially the entire length thereof. The spring for the male member is disposed on the opposite side of the end of the male member, and the valve seal is in contact with the inner surface of the distal end portion of the cylindrical attachment / detachment portion in the male member as a single unit. The valve seal and the inner surface of the distal end of the cylindrical attachment / detachment portion; Characterized in that to prevent internal leakage of fluid between.

According to the pipe joint of the embodiment, the pressure loss is reduced by changing the valve shape and eliminating the valve stop. In the circuit such as hydraulic pressure, the operating pressure can be reduced. In the fluid transport circuit, the flow rate increases at the same pressure. Furthermore, the joint weight is reduced by using a part of the joint material as a resin. Moreover, in the single male member, the tip of the cylindrical attachment / detachment portion can be kept in a state of preventing leakage of internal fluid.

The partial cross section figure of the male type member structure of the pipe joint of an embodiment. The partial sectional view of the female member simple substance of the pipe joint of an embodiment. The elements on larger scale of the male member structure of the pipe joint of embodiment. The perspective view of the valve | bulb of the male member of the pipe joint of embodiment. The rear view of the valve | bulb of the male member of the pipe joint of embodiment. The top view of the valve | bulb of the male member of the pipe joint of embodiment. The partial cross section figure of the fitting state of the female member and male member of the pipe joint of an embodiment. Sectional drawing of the male member of a prior art. Sectional drawing of the female member of a prior art. The perspective view of the valve | bulb and valve stop of a prior art. Sectional drawing of the male type member and female type member of a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Drawing 1 is a figure showing the composition of the pipe joint of an embodiment. FIG. 1A is a partial cross-sectional view of a male joint member (hereinafter referred to as a male member). FIG. 1B is a partial cross-sectional view of a female joint member (hereinafter referred to as a female member). FIG. 1C is an enlarged view of a portion where the valve seal 113 contacts the step 310 at the tip of the detachable component 114 of the male member 110.

  1A and 1C, the male member 110 includes a pipe attachment part 115, a detachable part 114, a valve spring 111, a valve 220, a sealing material 116, a step portion 311 and the like. The male side valve 220 has a valve seal 113 and a valve body 112 which are elastic bodies such as rubber. The valve 220 is mounted inside the pipe mounting part 115 in a state where the valve spring 111 is compressed, and the detachable part 114 is mounted. The pipe attachment part 115 and the attachment / detachment part 114 are attached by a pipe attachment part screw 118 and an attachment / detachment part screw 119. The end of the detachable component 114 on the female member side has an opening 117 having an inner diameter smaller than the outer diameter of the valve main body 112 and the valve seal 113, and has a step 310 at the tip of the male member. The valve seal 113 of the valve 220 abuts against the step 310 at the tip of the male member in a leak-proof state by the elastic force of the valve spring 111.

  FIG. 1B is a cross-sectional view of a female female member 120. The female member 120 includes an attachment / detachment component 129, a pipe attachment component 128, a sealing O-ring 132, operating members (hereinafter referred to as retainers) 130 and 131, a sealing O-ring 133, and a valve seal closing member (hereinafter referred to as pintle). ) 127, a valve stop 121, a snap ring 123, a valve spring 122, a valve 140, and an insertion hole for a male member 110 (not shown).

  The female valve 140 includes a valve main body 124, a V seal 125, and a valve seal 126. The valve 140 is in contact with the pintle 423 while being pressed by a valve spring 422 attached to the valve stop 421. The pintle 423 is fixed to the valve stop 421 by a snap ring 426. The valve stop 421 is fixed by a female member main body 427 and an adapter 428. The valve 140 abuts against the back side of the pintle 127 in a leak-proof state by the elastic force of the valve spring 122. The valve main body 124 and the detachable component 129 are in a leakage prevention state by the V seal 125.

  FIG. 2 is a view showing the shape of the valve 220 of the male member 110, and shows a state in which the valve seal 113 is attached to the tubular valve body 112. 2A is a perspective view of the valve body 112, FIG. 2B is a view as seen from the axial direction opposite to the valve seal 113 (back view when the valve seal 113 side is the front), and FIG. It is the figure (plan view) seen from the vertical direction.

  The male valve 220 is formed by integrally molding the valve main body 112 with a resin material and has at least three or more fins 211 as a guide when the valve is moved, so that the valve 220 is less likely to be inclined during the movement. The plurality of fins 211 are preferably equiangular on the axis of the valve 220. Although FIG. 2 shows a cube in which a plus shape divided by 90 degrees into four equal parts is formed in the longitudinal direction, it is not limited to this. For example, it may be a fin composed of three or six equal parts. By resin-molding the valve body 112, the shape of the fin 211 can be made relatively free, and the pressure loss is also reduced.

FIG. 3 is a connection diagram when the female member 120 and the male member 110 of the embodiment are combined.
When the cylindrical attachment / detachment portion (from the right end of FIG. 1A to the left end of the groove 311 in the center of the male member) is inserted toward the insertion hole of the female member 120, a plurality of male valves 220 are inserted. The fin 211 can move smoothly with the inner peripheral surface of the male member 110 as a guide. When the tip of the male member 110 comes into contact with the position of the valve seal 126 of the female member 120, the valve seal 113 of the male valve 220 simultaneously contacts the pintle 127 of the female member 120. Further, when the male member 110 moves to the right side in FIG. 3, on the male member 110 side, the valve 220 is pushed by the pintle 127, the valve spring 111 is contracted, and the valve seal 113 which has been kept airtight is male. A flow path is formed in the male mold member 120 away from the step 310 at the tip of the mold member.

  On the other hand, on the female member 120 side, the female valve 140 is pushed by the male member 110, the valve spring 122 contracts, and the valve seal 126 that has been kept airtight is separated from the pintle 127, so that the female member A flow path is also formed in 120.

  As described above, according to the present embodiment, the pintle 127 of the female member 120 and the valve seal 113 of the male member 110 are in contact with each other in a leak-proof state by the elastic force of the valve spring 111 of the male member 110, Prevent fluid leakage. The distal end of the male member main body 114 and the valve seal 126 of the female member 120 abut against each other in a leak-proof state by the elastic force of the valve spring 122, and together with the V seal 125 and the sealing O-ring 132, leakage of fluid in the flow path. To prevent.

  When the male member 110 and the female member 120 are coupled, the tip of the male member 110 abuts to the position of the valve seal 126 of the female member 120 and the valve spring 122 contracts, and the male member of the male member 110 When the valve spring 111 contracts in contact with the main body 114 and the pintle 127, a flow path between the male member 110 and the female member 120 is formed. Then, when the coupling is released, the male member 110 and the female member 120 return to the original leakage prevention state.

The male member 110 and the female member 120 are fixed to each other by fitting retainers 130 and 131 (resin operation members), which are resin parts, into the groove 311 at the center of the male member 110, and forming the retainer. This is done by pressing with a spring that is made.
According to the shape of the pipe joint of the embodiment, the flow path area is large and the pressure loss can be reduced as compared with the conventional shape in which the valve stop 411 needs to be used.

(Modification)
The valve of this embodiment can also be used in the configuration of the male member shown in FIG. 1A. The material of the valve body 112 may be a metal that can be integrally formed by injection molding powder metallurgy or the like. Further, the fin 211 may be divided into separate parts and molded into one part by bonding, welding, or the like.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

110 Male Member 111 Valve Spring 112 Valve Body 113 Valve Seal 117 Opening 120 Female Member 121 Valve Stop 122 Valve Spring 124 Valve Body 125 V Seal 126 Valve Seal 127 Valve Seal Closure Member (Pintle)
128 Piping mounting parts 130, 131 Operation member (Retainer)
135 Valve 140 Valve 211 Fin 220 Valve 310 Step at the tip of the male member 311 Groove at the center of the male member

Claims (3)

A pipe joint in which a flow path of an internal fluid is formed in the cylindrical attachment / detachment portion in a state in which the cylindrical attachment / detachment portion of a cylindrical male member including the cylindrical attachment / detachment portion is inserted and fitted into a female member. There,
The male member and the female member is provided with a valve for holding the leakage prevention state of the internal fluid due to the elasticity of the I if during alone,
In the process of inserting the cylindrical attachment / detachment portion of the male member into the hole of the female member and completing the fitting, the valve of the male member and the female member come into contact with each other, whereby the male member The internal fluid is prevented from leaking between the valve and the female member of the female member, and the valve of the female member and the male member are brought into contact with each other, whereby the valve of the female member and the female member are brought into contact with each other. leakage of internal fluid between the male member is prevented,
The valve of the male member is
A valve body having three or more fins that are guided by the inner peripheral surface of the male member and are movable along the axial direction of the male member;
A valve seal provided at an end of the valve body on the female member side,
The three or more fins are
Wherein are arranged along the axial direction of the male member Rutotomoni, it is guided in sliding contact with the inner peripheral surface of the male member on the inner peripheral surface of the male member over substantially the entire length slidable contact state, And it is mutually connected radially at the radial center of the male member over substantially the entire length ,
The spring for the male member is disposed on the opposite side of the end of the three or more fins on the opposite side to the female member,
In the male member as a single unit, the valve seal is in contact with the inner surface of the distal end portion of the cylindrical attachment / detachment portion, thereby leaking internal fluid between the valve seal and the inner surface of the distal end portion of the tubular attachment / detachment portion. pipe fitting, characterized in that to prevent. Wherein the valve of the male member is a pipe joint according to configured claim 1 from elastic member integrally molded resin member.   The pipe joint according to claim 1 or 2, further comprising a stepped portion that fits with a resin operation member of the female member at a central portion of the male member.

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