TWI633247B - Valve body, valve structure using the same, and joint member - Google Patents

Abstract

The present invention is to provide a valve body capable of preventing the sealing portion from falling off from the valve body by the action of a fluid.

The solution of the present invention is: a valve body having a valve body (24) and a sealing member (26), the valve body (24) is configured to be displaceable between a closed position and an open position, and the seal The member (26) is provided with an annular sealing portion (36) and a connecting portion (38), and the annular sealing portion (36) is fitted into a conical sealing surface (28) provided along the valve body The annular groove (30) is hermetically engaged with the valve seat surface (34) to prevent the flow of fluid. The connecting portion (38) passes through a connecting hole (32) in the valve body (24) in a diameter direction. ), The portions facing each other in the diameter direction of the annular seal portion (36) are connected.

Description

Valve body, valve structure using the same, and joint member

The present invention relates to a valve body suitable for installation in a fluid passage through which a high-pressure fluid passes, a valve structure using the valve body, and a joint member.

The valve body includes a valve body provided in the fluid passage and configured to be displaceable between a closed position and an open position, and a valve body provided in the valve body and sealingly engaged with the valve seat when the valve body is in the closed position. A ring-shaped sealing member (such as an O-ring) that prevents the flow of fluid. When the fluid piping used by the valve body handles high-pressure fluid, when the valve is opened to allow high-pressure fluid to flow through, the sealing member will be affected by the fluid. There is a possibility that the valve body may fall off from the valve body. As a countermeasure against such problems, for example, a technology has been developed in which a retaining ring for holding a sealing member in the valve body is provided in the valve body (Patent Document 1).

[Prior technical literature] [Patent Literature]

Patent Document 1: Japanese Patent No. 4791196

The present invention is intended to solve the above-mentioned problems by a method different from Patent Document 1.

That is, the present invention provides a valve body having a valve body and a sealing member. The valve body is provided in the fluid passage, and is configured to be in a closed position for closing the fluid passage and a valve for opening the fluid passage. The open position is shifted from the open position toward the closed position to be forward, and has a ring-shaped sealing surface facing forward, a ring-shaped groove provided along the sealing surface, and a through-hole. A connecting hole of the valve body with both ends communicating with the annular groove. The sealing member is provided with an annular sealing portion and a connecting portion. The annular sealing portion is fitted in the annular groove. At the closed position, it is sealingly engaged with a valve seat surface formed annularly on the passage wall surface of the fluid passage to prevent the flow of fluid. The connection portion extends from a part of the annular seal portion and passes through the connection hole to reach The other parts of the annular seal portion are connected by these two parts.

In this valve body, the sealing member of the valve body has an annular sealing portion and a connecting portion extending in the communication hole penetrating the valve body to connect the two portions of the annular sealing portion. Exposed to the flow of high-pressure fluid, the ring-shaped sealing portion is not easily detached from the ring-shaped groove of the valve body, thereby solving the problems in the conventional valve described above.

Preferably, the valve body can be penetrated by the connection hole along its diameter direction.

In this way, the connecting portion after passing through the communication hole connects the portions facing each other in the diameter direction of the annular sealing portion, and the annular sealing portion can be more evenly held. However, the communication hole and the connecting portion passing therethrough are not limited to this. For example, the communication hole may extend from the center of the valve body in three directions or more, or two or more of them may pass through the valve body separately. .

It can also be made that the ring-shaped sealing portion includes a ring-shaped front side and a rear side, and a ring-shaped radial outer side and a radial inner side surface extending between the front side and the rear side. The cross section is formed in a rectangular shape. The connecting portion extends from a part of the inner surface of the radial direction to the other part of the inner surface of the radial direction. The sealing surface is a conical tapered surface tapering toward the front. The ring The groove is formed on the sealing surface of the conical shape, and the annular groove has a bottom surface of the annular groove which is in contact with a radially inner side surface of the annular sealing portion fitted in the annular groove, respectively. A groove front side and a groove rear side which are in contact with the front side surface and the rear side surface of the annular sealing portion, and an opening portion opening in the conical sealing surface, and is outside the radial direction of the annular sealing portion. The front edge portion and the vicinity thereof extend from the opening portion and protrude from the sealing surface in a ring shape.

In this case, the annular groove may be formed by extending from a radially outer end edge of the rear side surface of the groove toward the front side to reach the outer surface of the groove radial direction of the sealing surface, and the outer surface of the groove radial direction and Fit in the ring The radial outer surface of the annular seal portion of the annular groove is in contact with each other. The radial outer surface of the annular seal portion is in contact with the radial outer surface of the groove located on the outer side of the annular seal portion, so that the annular seal portion cannot be easily released from the annular groove.

The present invention further provides a valve structure including the valve body and a valve housing as described above, the valve housing having a fluid passage for accommodating the valve body, and a fluid passage wall surface formed on a front side of the valve body. Ring valve seat surface.

Preferably, the valve seat surface is parallel to the sealing surface.

More preferably, the elastic coefficient of the annular seal portion is set to be pressed between the valve body and the valve seat surface when the valve body is in the closed position and a fluid pressure applied to the valve body becomes more than a certain value. It is deformed so that the sealing surface abuts the valve seat surface. In this way, when the fluid pressure in the fluid path reaches a certain level or more, the annular seal portion is substantially not affected by the fluid pressure, and the annular seal portion can be prevented from passing through the seal even when the fluid pressure is applied. Extruded between the surface and the valve seat surface. Therefore, the valve structure of the present invention can be used in a wide range of pressure zones from low pressure fluid piping to high pressure (ultra high pressure) fluid piping.

The valve structure may further include a spring member that is located in the closed position by urging the valve body forward, and the spring member is further forward than the valve body when the valve body is in the closed position. When the fluid pressure reaches a predetermined level or more, the valve body is displaced to the rear side and the annular seal portion is allowed to leave the valve seat surface, so that the valve body functions as a check valve.

The invention provides a joint member, which is a female type and a male type of a pipe joint. One of the joint members includes the valve structure for closing the flow path of the joint member, and when the other joint member is connected to the one joint member, the valve of the valve structure is provided. The body is displaced to the open position by the other joint member.

10‧‧‧ pipe joint

12‧‧‧female connector

12a‧‧‧ connector body (valve housing)

12b‧‧‧ sleeve

12c‧‧‧Lock

14‧‧‧Male connector components

14a‧‧‧annular groove

20, 22‧‧‧ valve body

24‧‧‧Valve body

26‧‧‧Sealing member

28‧‧‧Seal surface

30‧‧‧ annular groove

30a‧‧‧ bottom surface of annular groove

30b‧‧‧Side front side

30c‧‧‧Side rear side

30d‧‧‧ opening

30e‧‧‧Side Radial Outer Side

32‧‧‧ connecting hole

34‧‧‧Valve seat surface

36‧‧‧Ring seal

36a‧‧‧Front side

36b‧‧‧Rear side

36c‧‧‧ Radial Outer Side

36d‧‧‧ Radial inner side

36e‧‧‧Front edge

38‧‧‧Connection Department

FIG. 1 is a longitudinal sectional view showing a pipe joint provided with a valve body according to an embodiment of the present invention, and shows a state in which the male and female joint portions are not connected.

FIG. 2 is a view similar to FIG. 1 and shows that the fluid pressure in a fluid pipe (not shown) connected to the female joint member is high, and the sealing surface of the valve body on which the annular seal member is mounted is directly Engaged on the valve seat surface.

Fig. 3 is a longitudinal sectional view showing a state in which the male and female joint members of the pipe joint shown in Fig. 1 are connected to each other, and the valve body in the joint member is in an open position.

Fig. 4 is a view showing an annular groove and a connecting portion formed in the valve body when viewed from line IV-IV in Fig. 1.

FIG. 5 is an enlarged sectional view showing a portion shown by a circle A in FIG. 2.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The pipe joint 10 shown in the figure is composed of a female joint member 12 and a male joint member 14. When connecting these joint members 12, 14, the first First, the sleeve 12b mounted on the outer peripheral surface of the joint body (valve housing) 12a of the female joint member 12 is shifted from the position shown in FIG. 1 to the left, and the ball-shaped locking member 12c can be turned toward the radius. A state of outward displacement. In this state, the male joint member 14 is inserted into the female joint member 12, and the locking member 12c is pushed outward in the radial direction for insertion, so that the ball-shaped locking member 12c and the male joint member are provided on the male joint member. The annular groove 14a on the outer peripheral surface of 14 is integrated, and the sleeve 12b is returned to the original position by the spring pressure of the coil spring 12d. Thereby, the locking member 12c does not fall off from the annular groove 14a, and the connection between the two joint members 12 and 14 is completed.

In the illustrated pipe joint 10, the female joint member 12 and the male joint member 14 are each provided with poppet-type valve bodies 20 and 22 for closing these fluid passages 12A and 14A. When the two joint members 12 and 14 are moved close to each other in the axial direction to be connected, the two valve bodies 20 and 22 abut against each other to stop the operation in the axial direction. In this state, the two joints 12 and 14 are stopped. The members 12 and 14 are further moved, and the valve bodies 20 and 22 of both sides are changed from the closed position for preventing fluid flow shown in FIG. 1 and FIG. 2 to the open position for allowing fluid flow shown in FIG. 3.

The structure of the pipe joint as described above is a matter that is well known to those having ordinary knowledge in the technical field, and detailed descriptions thereof are omitted here. The features of the present invention are the valve bodies 20 and 22 described below. Since the valve body 20 and the valve body 22 are substantially the same, only the valve body 20 will be described below.

The valve body 20 includes a valve body 24 and a sealing member 26 mounted on the valve body 24. Turn the valve body 20 from the open position shown in Figure 3 toward the first When the direction of the closed position shown in FIG. 2 and FIG. 2 is set to the front, the valve body 24 has a conical sealing surface 28 tapering toward the front, and a ring shape provided along the sealing surface 28. A groove 30 and a connection hole 32 (see FIG. 4) that penetrates the valve body 24 in the diameter direction and communicates with the annular groove 30 at both ends.

As shown in FIG. 5, the sealing member 26 includes an annular sealing portion 36 fitted in the annular groove 30, and a portion extending in the connecting hole 32 and facing the diameter direction of the annular sealing portion 36. Linked part 38. The ring-shaped sealing portion 36 seals the card with the ring-shaped valve seat surface 34 in the passage wall surface of the fluid passage 12A formed in the joint body 12a when the valve body 20 is in the closed position shown in Figs. 1 and 2. Combined to prevent fluid flow. The annular sealing portion 36 and the connecting portion 38 are formed by injection molding using the valve body 24 provided with the annular groove 30 and the connecting hole 32 as a part of a mold, as in external molding.

As shown in FIG. 5, the annular seal portion 36 includes a front side surface 36 a and a rear side surface 36 b, and a ring-shaped radial outer surface 36 c and a radial inner surface 36 d extending between the front side surface 36 a and the rear side surface 36 b. , And its cross section forms a rectangular shape. The annular groove 30 is formed on the conical sealing surface 28, and has an annular groove bottom surface 30a which is in contact with a radial inner side surface 36d of the annular sealing portion 36 fitted in the annular groove 30, and each has an annular groove. The groove front side surface 30b and the groove rear side surface 30c where the front side surface 36a and the rear side surface 36b of the shape sealing portion 36 are in contact with each other, and the opening portion 30d opened in the sealing surface 28. In FIG. 5, as shown by the imaginary line, the chamfered edge portion 36 e on the outer side of the annular seal portion 36 in the radial direction and the front side and its attachment The near-triangular portion extends from the opening portion 30 d and protrudes from the sealing surface 28 in a ring shape.

In the example shown in the figure, the groove rear side surface 30c extends straight from the annular groove bottom surface 30a and intersects the sealing surface 28. However, the groove rear side surface 30c may be configured to reach the sealing surface 28 before reaching the sealing surface 28. Termination is performed, and a radial outer side surface 30 e of the groove extending forward and intersecting the sealing surface 28 is formed by contacting the end edge on the outer side in the radial direction from the termination with the radial outer side surface 36 c of the annular seal portion 36. In this way, when the fluid acts to detach the annular seal portion 36 from the annular groove 30, the groove radial outer side surface 30e suppresses the annular seal portion 36 and complements the role of the connection portion 38, which is more effective. This ring-shaped sealing portion 36 is prevented from falling off from the ring-shaped groove 30.

As described above, the valve body of the present invention is applied to a pipe joint, and the fluid of the pipe joint is opened and closed as the pipe joint is connected and released, but the present invention is not limited thereto. That is, for example, when the valve body 22 is not provided in the male connector member, the valve body 20 is tightly pressed against the valve seat surface 34 by the coil spring 40, and only the fluid passage in the male connector member 14 is connected. When the fluid pressure in 14A reaches a certain level or more, the valve body 20 will be displaced rearward and leave the valve seat surface 34, so that the fluid can flow from the fluid path 14A side of the male joint member 14 to the fluid path of the female joint member 12 The 12A side flows and functions as a check valve. That is, the valve system of the present invention can be used to form valve structures in various fluid passages, and particularly to form effective valve structures in fluid passages through which high-pressure fluid passes.

Claims (8)

A valve body is provided with a valve body and a sealing member. The valve body is provided in a fluid passage and is configured to be movable between a closed position for closing the fluid passage and an open position for opening the fluid passage. The valve body has a ring-shaped sealing surface facing forward, a ring-shaped groove provided along the sealing surface, and a valve body penetrating the valve body. The sealing member has an annular sealing portion and a connecting portion, and the annular sealing portion is fitted in the annular groove. When the valve body is in the closed position, When the seal is engaged with a valve seat surface formed in an annular shape on a passage wall surface of the fluid passage to prevent fluid flow, the connection portion extends from a part of the annular seal portion and passes through the connection hole to reach the ring. The ring-shaped sealing portion includes a ring-shaped front side and a rear side, and a ring-shaped radius extending between the front side and the rear side. The outer side and the inner side in the radial direction, and the cross section is formed in a rectangular shape. The connecting portion extends from a part of the inner side in the radial direction to the other part in the inner side of the radial direction. The sealing surface is oriented. A tapered tapered surface tapered in the front, the annular groove is formed on the sealing surface of the tapered shape, and the annular groove has a radius with the annular sealing portion fitted in the annular groove. The bottom surface of the annular groove contacting the inner side surface in the direction, the front side of the groove and the rear side of the groove respectively contacting the front side and the rear side of the annular sealing portion, and the opening portion opening in the conical sealing surface. Further, on the radially outer side of the annular sealing portion, the front edge portion and its vicinity extend from the opening portion and protrude from the sealing surface in a ring shape. For example, the valve body of the scope of patent application, wherein the connection hole penetrates the valve body along its diameter direction. For example, the valve body according to item 1 or 2 of the patent application scope, wherein the annular groove has a radial outer side edge extending from the outer side in the radial direction on the rear side of the groove to the outer side in the radial direction of the sealing surface, The radial outer surface of the groove is in contact with the radial outer surface of the annular seal portion fitted in the annular groove. A valve structure includes: a valve body having the scope of claims 1, 2, or 3; and a valve housing. The valve housing has a fluid passage for accommodating the valve body and is formed on a front side of the valve body. The annular valve seat surface of the fluid passage wall surface. For example, the valve structure according to item 4 of the patent application, wherein the valve seat surface is parallel to the sealing surface. For example, the valve structure of the scope of patent application No. 5, wherein the elastic coefficient of the annular seal portion is set so that when the valve body is in the closed position and the fluid pressure applied to the valve body becomes a certain level or more, the valve body The body and the valve seat surface are crushed and deformed so that the sealing surface abuts the valve seat surface. For example, the valve structure of claim 4 may further include a spring member that urges the valve body forward to be in the closed position. When the valve body is in the closed position, the spring member is The pressure of the fluid in front of the valve body is more than a predetermined value, so that the valve body is displaced to the rear side to allow the annular seal portion to leave the valve seat surface, so that the valve body functions as a check valve. A joint member is a joint member of one of a mother type and a male type, and includes a valve structure for closing the flow path of the joint member according to item 4 of the patent application. When the other joint member among the male joint members is connected, the valve body of the valve structure is displaced to the open position by the other joint member.