JP2019157649A - Connector with pulsation absorbing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange an L-shaped absorber having a diameter equal to or larger than the outer diameter of a pipe inserted into a connector main body inside the connector main body even if the connector main body is integrally molded. To provide a connector with a shape pulsation absorption function. SOLUTION: A connector 100 (connector with a pulsation absorbing function) is inserted into a connector main body 1 through an opening 1a into which a pipe 50 is inserted, and a collar that determines a position of a balloon 3 (pulsating absorber) in the inside. 4 (absorbent holding member) is provided. The collar 4 is a fluid flow section having an opening 12a formed on a side surface thereof, which is arranged at a position facing the flow path 2a of the cylindrical pipe holding portion 11 and the male joint portion 2 (joint portion) into which the pipe 50 is inserted. 12 and an absorber holding portion 13 for holding the balloon 3 are provided in this order. [Selection diagram] Fig. 2

Description

  The present invention relates to an L-shaped connector having a pulsation absorption function, and more particularly to an L-shaped connector having a pulsation absorption function suitable for connection to a fuel pipe or the like.

  As this type of connector, for example, there are connectors described in Patent Documents 1 and 2. The connector (fluid joint) described in Patent Document 1 includes a bellows (pulsation absorber) made of resin or rubber and disposed inside the joint body. The bellows is connected to the joint body via a plate-shaped support. Is placed inside. Here, in the L-shaped connector described in FIG. 2 of Patent Document 1, the wall of the end portion in the axial direction of the joint body is a support to which the bellows is fixed. That is, the joint body is not an integrally molded product. The outer diameter of the bellows is substantially equal to the outer diameter of the pipe.

  On the other hand, the L-shaped connector (connector for fuel piping) described in Patent Document 2 includes a cylinder formed integrally with the housing, separately from the housing (joint body), and a piston is provided in the cylinder. Has been placed. This piston plays a role of pulsation absorption. Here, the cylinder is closed by a cylinder lid. That is, the cylinder and the cylinder lid are not integrally molded products. Since the outer diameter of the piston can be determined regardless of the outer diameter of the pipe (fuel piping), it is easy to increase the piston pulsation absorption function by making the outer diameter of the piston larger than the outer diameter of the pipe. is there.

JP 2010-79773 A JP 2011-163154 A

  However, the L-shaped connector described in FIG. 2 of Patent Document 1 and the L-shaped connector described in Patent Document 2 have the following problems. In the L-shaped connector described in Patent Document 1, the joint body is not an integrally molded product as described above. Similarly, in the L-shaped connector described in Patent Document 2, as described above, the cylinder and the cylinder lid are not integrally molded products. That is, in any L-shaped connector, there is a problem that airtight reliability is lower than that of an integrally molded product.

  On the other hand, in an L-shaped connector having a pulsation absorber having the same diameter or more as the outer diameter of the pipe, there is no connector in which the connector body is an integrally molded product.

  The present invention has been made in view of the above circumstances, and its purpose is to provide an outer diameter of a pipe inserted into the connector main body portion into the connector main body portion even if the connector main body portion is integrally formed. An object of the present invention is to provide an L-shaped connector with a pulsation absorbing function in which a pulsation absorber having the same diameter or more can be disposed.

  The present invention provides a connector main body portion as a female joint portion into which a pipe is inserted, a joint portion provided on a side surface of the connector main body portion and having a flow path communicating with the inside of the connector main body portion, and the connector main body portion. It is an L-shaped connector with a pulsation absorption function provided with a pulsation absorber that is disposed inside the pulsation and absorbs pulsation of fluid. The connector with a pulsation absorbing function includes an absorber holding member that is inserted into the connector main body through an opening into which the pipe is inserted, and determines the position of the pulsation absorber in the inside, and the absorber holding member Is a cylindrical pipe holding portion into which the pipe is inserted, a fluid circulation portion having an opening formed on a side surface, which is disposed at a position facing the flow path of the joint portion, and holds the pulsation absorber. It has an absorber holding | maintenance part in this order.

  According to the present invention, the pulsation absorber can be positioned inside the connector main body by inserting the absorber holding member into the connector main body from the opening into which the pipe is inserted. Even if the connector body portion is not provided with a dedicated opening for inserting the member, which must be closed later, that is, even if the connector body portion is formed integrally, the connector body portion is provided inside the connector body portion. A pulsation absorber having a diameter equal to or larger than the outer diameter of the pipe inserted into the portion can be disposed.

It is a perspective view of a connector with a pulsation absorption function in a state where a pipe is connected to the connector with a pulsation absorption function according to an embodiment of the present invention. It is sectional drawing of the connector with a pulsation absorption function in the state where the pipe was connected to the connector with a pulsation absorption function which concerns on one Embodiment of this invention. FIG. 3 is a perspective view of the collar shown in FIG. 2. It is a perspective view of the pulsation absorber shown in FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Connector configuration)
A connector 100 (connector with a pulsation absorbing function) shown in FIGS. 1 and 2 is connected in a fuel piping system for supplying fuel (fuel oil such as gasoline) to an injector (fuel injection device, not shown), for example. It is a connector used for.

  This connector 100 is an L-shaped connector including a connector main body 1 as a female joint into which a pipe 50 is inserted, and a male joint 2 (joint) provided on a side surface of the connector main body 1. . The connector main body 1 is an integrally molded product, and is integrally molded by, for example, injection molding. The same applies to the connector main body 1 and the male joint 2, and the connector main body 1 and the male joint 2 are integrally formed by, for example, injection molding. In the present embodiment, the connector main body 1 and the male joint 2 are orthogonal to each other, but the connector main body 1 and the male joint 2 do not have to be orthogonal, for example, the connector main body 1 and The angle formed with the male joint portion 2 may be 45 degrees. That is, the above “L-shape” means that the angle formed by the connector main body 1 and the male joint 2 is not limited to 90 degrees but includes various angles such as 30 degrees, 45 degrees, 60 degrees, and the like. Also included are angles.

  For example, a fuel hose (not shown) is connected to the male joint portion 2. 1 and 2 is a part called a retainer for fixing the pipe 50 to the connector main body 1. The pipe 50 is fixed (locked) to the connector main body 1 by engaging the spool 50 a (annular protrusion) of the pipe 50 with the retainer 8. For a more specific example of the retainer 8, refer to, for example, the retainer described in JP-A-2015-48898.

  Here, a high pressure (fuel pressure) is constantly applied to the flow path 2a of the male joint part 2 through which the fuel flows, the inside of the connector main body part 1, and the flow path 50b of the pipe 50 by a fuel pump (not shown). It becomes a state. When fuel is injected from the injector, the pressure decreases, and when the injector valve closes, the pressure increases. The pressure fluctuates due to this repetition, and this pressure fluctuation causes fuel (fluid) pulsation.

  Therefore, a balloon 3 (pulsation absorber) that absorbs pulsation of fuel (fluid) is disposed inside the connector main body 1. The balloon 3 of this embodiment is a bellows-shaped hollow elastic body, and the material thereof is resin, rubber or the like. The fluctuation in fuel pressure is alleviated by the balloon 3, so that the fuel pulsation is suppressed. In the present embodiment, concave portions 3a and 3b are provided at both axial ends of the balloon 3 that is elastically deformed. Further, the outer diameter Dm (see FIG. 3B) of the balloon 3 is larger than the outer diameter Dp of the pipe 50.

  The balloon 3 is positioned and held by the collar 4 (absorber holding member) inside the connector main body 1.

  The collar 4 has a cylindrical pipe holding part 11 into which the tip part of the pipe 50 is inserted, a fluid circulation part 12 arranged at a position facing the flow path 2a of the male joint part 2, and an absorption for holding the balloon 3. It has the body holding | maintenance part 13 (refer FIG. 3A) in this order. An opening 12 a is formed on the side surface of the fluid circulation part 12. In addition, the fluid circulation part 12 of the collar 4 of the present embodiment is tapered from the pipe holding part 11 toward the absorber holding part 13. As shown in FIG. 3A, a hole 13 a is formed at the center of the tip of the absorber holding part 13.

A method for assembling the connector 100 will be described.
First, the balloon 3 is inserted into the connector main body 1 from the opening 1a into which the pipe 50 is inserted. In the present embodiment, a convex portion 1b is formed on the inner surface of the axial end portion of the connector main body 1 where the balloon 3 is disposed. When the balloon 3 is inserted to the back of the connector main body 1, the convex portion 1b is formed. The concave portion 3b of the balloon 3 is fitted into the portion 1b. Here, the insertion of the balloon 3 into the connector main body 1 can be performed, for example, by dropping the balloon 3 from the opening 1a, and the balloon 3 is chucked (gripped) to the inside of the connector main body 1. There is no need to insert it into The balloon 3 may be inserted into the connector main body 1 by pushing the balloon 3 into the connector main body 1 with the collar 4.

  Next, the collar 4 is inserted into the connector main body 1 from the opening 1a. Then, the absorber holding part 13 of the collar 4 is fitted into the recess 3 a provided in the balloon 3. Thereafter, the O-ring 5, the annular spacer 6, the O-ring 5, and the annular spacer 7 are inserted into the connector body 1 in this order. In the present embodiment, two O-rings 5 are inserted into the connector body 1, but the number of O-rings 5 is not limited to this.

(Action / Effect)
According to the connector 100, the balloon 3 in the connector main body 1 can be positioned by inserting the absorber holding member (collar 4) into the connector main body 1 from the opening 1a into which the pipe 50 is inserted. Therefore, even if the connector main body 1 is not provided with a dedicated opening for inserting the collar 4 that must be closed later, that is, even if the connector main body 1 is formed integrally, the connector main body A balloon 3 having a diameter equal to or larger than the outer diameter of the pipe 50 can be disposed in the interior of 1. Since the connector main body 1 (connector main body 1 and male joint 2) is an integrally molded product, the airtight reliability of the connector 100 is maintained.

  Further, since the outer diameter Dm (see FIG. 3B) of the pulsation absorber (balloon 3) is larger than the outer diameter Dp of the pipe 50 (being equivalent to the inner diameter of the connector body 1), the pulsation absorber ( The pulsation absorbing function of the balloon 3) is enhanced. Furthermore, since a step such as welding is not required for the installation of the pulsation absorber (balloon 3), the connector 100 can be easily assembled accordingly.

  Further, when the pipe 50 is connected to the connector 100, the tip end portion of the pipe 50 is supported by the pipe holding portion 11 of the collar 4, so that the movement (backlash) of the pipe 50 due to fluid pulsation or the like is suppressed, and the O-ring The sealability of 5 is also difficult to deteriorate. The pipe holding portion 11 of the collar 4 also contributes to holding the pulsation absorber (balloon 3) inside the connector main body portion 1.

  Furthermore, in this embodiment, the fluid circulation part 12 of the collar 4 is tapered from the pipe holding part 11 toward the absorber holding part 13. According to this, even when the collar 4 rotates around the axial direction when the collar 4 is inserted into the connector main body 1, the flow path 2 a of the male joint portion 2 is not blocked. That is, when assembling the connector 100, the operator does not need to pay attention to the rotation and angle of the collar 4 around the axial direction.

  Moreover, in this embodiment, while the convex part 1b is formed in the axial direction edge part inner surface where the balloon 3 is arrange | positioned of the connector main-body part 1, the recessed part 3b in which the said convex part 1b fits is the balloon 3. Is formed. According to this, it is easy to position the balloon 3 (improvement of assembly), and it is possible to prevent the positional deviation of the balloon 3.

  In the present embodiment, the balloon 3 is formed with a recess 3 a into which the tip end portion (absorber holding portion 13) of the collar 4 is fitted. According to this, it is easy to position the balloon 3 (improvement of assembly), and it is possible to prevent the positional deviation of the balloon 3.

  In the present embodiment, a hole 13 a that communicates with the balloon 3 is formed in the tip portion (absorber holding portion 13) of the collar 4. According to this, since the pulsation of the fluid is easily transmitted to the balloon 3, the pulsation of the fluid can be further suppressed.

(Modification)
The above embodiment can be modified as follows.
Instead of the bellows-shaped hollow elastic body such as the balloon 3, for example, a porous body having independent pores having elasticity such as a rubber sponge may be used as the pulsation absorber.

  The fluid circulation portion 12 may be a straight cylinder instead of a tapered shape. Moreover, the recessed parts 3a and 3b do not need to be formed in the axial direction both ends of the balloon 3 (pulsation absorber). Similarly, the convex part 1b does not need to be formed in the axial direction edge part inner surface in which the balloon 3 (pulsation absorber) of the connector main-body part 1 is arrange | positioned.

  If the fluid and the balloon 3 (pulsation absorber) are in contact with each other, the pulsation of the fluid can be absorbed by the balloon 3 (pulsation absorber). The hole 13a communicating with the balloon 3 may not be formed.

  About the part of the male joint part 2 of the connector 100, this part may be made into the flange joint etc.

  The use of the connector 100 is not limited to the connection of fuel pipes and the like. For example, the connector 100 may be used to connect a pipe through which water flows. The balloon 3 (pulsation absorber) can suppress the pulsation of water and can prevent the connector 100 and the pipe connected thereto when the water is frozen. Furthermore, the connector 100 may be used for connecting a pipe through which compressed air flows, and in this application, pulsation of the compressed air is suppressed.

  In addition, it is needless to say that various modifications can be made within a range that can be assumed by those skilled in the art.

1: Connector main part 1a: Opening 1b: Convex part 2: Male joint part (joint part)
2a: flow path 3: balloon (pulsation absorber)
3a, 3b: Recess 4: Collar (absorber holding member)
11: Pipe holding part 12: Fluid circulation part 12a: Opening 13: Absorber holding part 13a: Hole 50: Pipe 100: Connector (connector with pulsation absorbing function)

Claims (6)

A connector body as a female joint into which a pipe is inserted;
A joint portion provided on a side surface of the connector main body portion and having a flow path communicating with the inside of the connector main body portion;
A pulsation absorber that is disposed inside the connector body and absorbs pulsation of fluid;
An L-shaped connector with a pulsation absorbing function,
An absorber holding member that is inserted into the connector main body from the opening into which the pipe is inserted and determines the position of the pulsation absorber in the interior;
The absorber holding member includes a cylindrical pipe holding portion into which the pipe is inserted, a fluid circulation portion having an opening formed on a side surface, disposed at a position facing the flow path of the joint portion, and the pulsation The connector with a pulsation absorption function which has the absorber holding | maintenance part holding an absorber in this order. In the connector with a pulsation absorbing function according to claim 1,
The connector body is an integrally molded product,
The outer diameter of the pulsation absorber is larger than the outer diameter of the pipe,
Connector with pulsation absorption function In the connector with a pulsation absorbing function according to claim 1 or 2,
The fluid circulation part is tapered from the pipe holding part toward the absorber holding part,
Connector with pulsation absorption function. In the connector with a pulsation absorbing function according to any one of claims 1 to 3,
A convex portion is formed on the inner surface of the axial end portion of the connector main body where the pulsation absorber is disposed, and a concave portion into which the convex portion is fitted is formed in the pulsation absorber.
Connector with pulsation absorption function. In the connector with a pulsation absorbing function according to any one of claims 1 to 4,
The pulsation absorber is formed with a recess into which the absorber holding part is fitted.
Connector with pulsation absorption function. In the connector with a pulsation absorbing function according to any one of claims 1 to 5,
A hole communicating with the pulsation absorber is formed in the absorber holder.
Connector with pulsation absorption function.

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