JP6613316B2 - Valve body, valve structure using the valve body, and joint member - Google Patents

Description

  The present invention relates to a valve body suitable for being provided in a fluid passage for passing a high-pressure fluid, and a valve structure and a joint member using the valve.

A valve body provided in the fluid passage and displaceable between a closed position and an open position; and when the valve body is provided in the valve body and in the closed position, the valve body is hermetically engaged with the valve seat to allow fluid flow. In the case of a valve body having an annular seal member (for example, an O-ring) that prevents high pressure fluid, when the fluid piping in which the valve body is used handles high pressure fluid, the seal member acts when the high pressure fluid flows when the valve opens. There is a risk that the valve body will be detached from the valve body. As a measure for solving such a problem, for example, a structure in which a holding ring for holding a seal member on the valve body is provided on the valve body has been developed (Patent Document 1).

Japanese Patent No. 4791196

  The present invention seeks to solve the above-described problem by a method different from that of Patent Document 1.

That is, the present invention is a valve body provided in a fluid passage and displaceable between a closed position for closing the fluid passage and an open position for opening the fluid passage, An annular sealing surface facing forward, an annular groove provided along the sealing surface, and both ends penetrating through the valve body with the direction from the position toward the closed position as the front are communicated with the annular groove A valve body having a connecting hole,
An annular seal portion fitted into the annular groove and sealingly engaged with a valve seat surface formed annularly on the passage wall surface of the fluid passage when the valve body is in the closed position; A seal member having a connecting portion that extends from a part of the annular seal portion, passes through the connecting hole, reaches the other portion of the annular seal portion, and connects these two portions;
A valve body is provided.

  In this valve body, the seal member of the valve body has an annular seal portion and a connecting portion that extends through the communication hole passing through the valve body and connects the two portions of the annular seal portion. Even when exposed to the flow of high-pressure fluid, the annular seal portion is unlikely to come off from the annular groove of the valve main body, thereby making it possible to solve the problems in the conventional valve described above.

Preferably, the connection hole can penetrate the valve body in the diametrical direction.
Such a connecting portion that is passed through the communication hole connects the portions of the annular seal portion that are opposed to each other in the diametrical direction, so that the annular seal portion can be held in a more balanced manner. However, the communication hole and the connecting portion passing therethrough are not limited to this. For example, the communication hole may extend radially from the center of the valve body in three or more directions, or two or more may be separately provided in the valve body. It can also be passed through.

The annular seal portion has an annular front side surface and a rear side surface, and an annular radial outer side surface and a radial inner side surface extending between the front side surface and the rear side surface, and has a rectangular cross section. And
The connecting portion extends from a portion of the radially inner surface to another portion of the radially inner surface;
The sealing surface is a conical tapered surface tapered forward;
The annular groove is formed in the conical sealing surface, and the annular groove is in contact with the radially inner side surface of the annular seal portion fitted in the annular groove; and the annular seal A groove front side surface and a groove rear side surface respectively in contact with the front side surface and the rear side surface of the portion, and an opening opening in the conical sealing surface. The side edge and the vicinity thereof may extend from the opening and project annularly from the sealing surface.
In this case, the annular groove has a groove radial outer surface extending forward from the radially outer edge of the groove rear side surface to reach the sealing surface, and the groove radial outer surface is formed in the annular groove. It is possible to contact the radially outer surface of the fitted annular seal portion. It is possible to prevent the annular seal portion from coming out of the annular groove by contacting the radially outer surface of the annular seal portion with the outer radial surface of the groove on the outside thereof.

The present invention further includes
The valve body as described above,
And a valve housing having an annular valve seat surface formed on a wall surface of the fluid passage on the front side of the valve body.

Preferably, the valve seat surface is parallel to the sealing surface.
More preferably, the annular seal portion is crushed between the valve seat surface and the sealing surface when the valve body is in the closed position and the fluid pressure applied to the valve body exceeds a certain level. It has an elastic coefficient that is deformed so as to abut against the valve seat surface. By doing so, the annular seal portion is substantially shielded from the fluid pressure when the fluid pressure in the fluid passage becomes a certain level or more, and even if fluid pressure is applied, the annular seal portion It is possible to prevent pushing out between the sealing surface and the valve seat surface. For this reason, the valve structure according to the present invention can be used over a wide range of pressure ranges from low pressure fluid piping to high pressure (ultra-high pressure) fluid piping.

  The valve structure further includes a spring member that urges the valve body forward to place the valve body in the closed position, and the spring member is forward of the valve body when the valve body is in the closed position. The valve body functions as a check valve by allowing the valve body to be displaced rearward by allowing the fluid pressure of the valve to exceed a predetermined value and allowing the annular seal portion to move away from the valve seat surface. Can be.

The present invention is also a joint member of one of a female joint and a male joint member of a pipe joint, including the valve structure for closing the flow path of the joint member, and the one joint member When the other joint member is coupled to the valve body, the joint body is configured such that the valve body of the valve structure is displaced to the open position by the other joint member.

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

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 male and female joint portions are not connected. FIG. 2 is a view similar to FIG. 1 except 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 to which the annular seal member is attached is a direct valve. The state which is engaged with the seating surface is shown. It is a longitudinal cross-sectional view which shows the state by which the male type and female type joint member of the pipe joint shown in FIG. 1 were mutually connected, and the valve body in a joint member was made into the open position. It is a figure which shows the annular groove and connection part which were formed in the valve main body when it sees by the IV-IV line | wire in FIG. FIG. 3 is an enlarged cross-sectional view of a portion indicated by a circle A in FIG. 2.

  The illustrated pipe joint 10 includes a female joint member 12 and a male joint member 14. When connecting these joint members 12 and 14, first, the sleeve 12b attached to the outer peripheral surface of the joint body (valve housing) 12a of the female joint member 12 is displaced leftward from the position shown in FIG. The spherical locker 12c is brought into a state displaceable radially outward. In this state, the male joint member 14 is inserted into the female joint member 12, and the insertion is advanced while pushing the lock 12c outward in the radial direction so that the spherical lock 12c is placed on the outer peripheral surface of the male joint member 14. In alignment with the provided annular groove 14a, the sleeve 12b is returned to its original position by the biasing force of the coil spring 12d. As a result, the lock 12c does not come off from the annular groove 14a, and the coupling of both joint members 12, 14 is completed.

  The illustrated pipe joint 10 is provided with poppet type valve bodies 20 and 22 for closing the fluid passages 12A and 14A of both the female joint member 12 and the male joint member 14. When the joint members 12 and 14 are moved and connected so as to approach each other in the axial direction, the valve bodies 20 and 22 come into contact with each other and the movement in the axial direction is stopped. , 14 is moved further so that both valve bodies 20, 22 are moved from the closed position shown in FIGS. 1 and 2 to the open position allowing the fluid flow shown in FIG. It has become.

  The structure as a pipe joint as described above is a matter well known to those skilled in the art, and a detailed description thereof is omitted here. The characteristics of the present invention are particularly in 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 main body 24 and a seal member 26 attached to the valve main body 24. When the valve body 20 is directed forward from the open position shown in FIG. 3 to the closed position shown in FIGS. 1 and 2, the valve body 24 has a conical sealing surface 28 that tapers forward and a sealing body. An annular groove 30 provided along the surface 28 and a connecting hole 32 penetrating the valve body 24 in the diameter direction and communicating with both ends of the annular groove 30 (FIG. 4).

  As shown in FIG. 5, the seal member 26 is connected to an annular seal portion 36 fitted in the annular groove 30 and a connecting portion 38 that extends through the connecting hole 32 and opposes the annular seal portion 36 in the diametric direction. And have. When the valve body 20 is in the closed position shown in FIGS. 1 and 2, the annular seal portion 36 is sealed to the valve seat surface 34 formed in an annular shape on the passage wall surface of the fluid passage 12A formed in the joint body 12a. Engage to prevent fluid flow. The annular seal 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 outsert molding.

  As shown in FIG. 5, the annular seal portion 36 includes a front side surface 36a and a rear side surface 36b, and an annular radial outer side surface 36c and a radial inner side surface 36d extending between the front side surface 36a and the rear side surface 36b. The cross section is rectangular. The annular groove 30 is formed on the sealing surface 28 having a conical shape. The annular groove bottom surface 30 a is in contact with the radially inner side surface 36 d of the annular seal portion 36 fitted in the annular groove 30, and the front side surface of the annular seal portion 36. A groove front side surface 30b and a groove rear side surface 30c that are in contact with 36a and the rear side surface 36b, respectively, and an opening 30d that opens to the sealing surface 28 are provided. As indicated by an imaginary line in FIG. 5, a chamfered edge portion 36 e on the outer side in the radial direction of the annular seal portion 36 and a substantially triangular portion in the vicinity thereof extend from the opening portion 30 d and ring from the sealing surface 28. To protrude.

  In the illustrated example, the groove rear side surface 30c extends straight from the annular groove bottom surface 30a so as to intersect with the sealing surface 28. However, the groove rear side surface 30c is terminated at a portion before reaching the sealing surface 28. A groove radial outer surface 30e is formed so as to extend forward from the end edge of the radially outer end, which is in contact with the radial outer surface 36c of the annular seal portion 36, and to intersect with the conical sealing surface 28. It can also be. Thus, when the fluid acts to remove the annular seal portion 36 from the annular groove 30, the groove radial outer surface 30 e restrains the annular seal portion 36, and coupled with the action of the connecting portion 38, the annular seal It becomes possible to prevent the part 36 from coming off the annular groove 30 more effectively.

  As described above, the valve body according to the present invention is applied to a pipe joint and the fluid of the pipe joint is opened and closed in accordance with the connection and release of the pipe joint. However, the present invention is limited to this. It is not a thing. That is, for example, when the valve body 22 is not provided in the male joint member, the valve body 20 is pressed against the valve seat surface 34 by the coil spring 40 and fluid in the fluid passage 14A in the connected male joint member 14 is obtained. Only when the pressure exceeds a certain level, the valve body 20 is displaced rearward and away from the valve seat surface 34, so that fluid flows from the fluid passage 14A side of the male joint member 14 to the fluid passage 12A side of the female joint member 12 side. It can also function as a check valve that allows flow. That is, the valve body according to the present invention can be used to constitute a valve structure effective in various fluid passages, particularly in a fluid passage through which high-pressure fluid passes.

Pipe joint 10; Female joint member 12; Joint body (valve housing) 12a; Sleeve 12b; Locking element 12c; Male joint member 14; Annular groove 14a; Valve body 20, 22; Surface 28; annular groove 30; annular groove bottom surface 30a; groove front side surface 30b; groove rear side surface 30c; opening 30d; groove radial outer side surface 30e; connection hole 32; valve seat surface 34; annular seal portion 36; 36a; rear side surface 36b; radial outer side surface 36c; radial inner side surface 36d; front edge 36e;

Claims (6)

A valve body provided in the fluid passage and displaceable between a closed position for closing the fluid passage and an open position for opening the fluid passage, the valve body from the open position to the closed position An annular sealing surface facing forward, an annular groove provided along the sealing surface, and a connecting hole penetrating the valve body and communicating at both ends with the annular groove. A valve body having,
An annular seal portion fitted into the annular groove and sealingly engaged with a valve seat surface formed annularly on the passage wall surface of the fluid passage when the valve body is in the closed position; A seal member having a connecting portion that extends from a part of the annular seal portion, passes through the connecting hole, reaches the other portion of the annular seal portion, and connects the two portions;
Have
The connecting hole penetrates the valve body in the diameter direction;
The annular seal portion has an annular front side surface and a rear side surface, and an annular radial outer side surface and a radial inner side surface extending between the front side surface and the rear side surface, and has a rectangular cross section. And
The connecting portion extends from a portion of the radially inner surface to another portion of the radially inner surface ;
The sealing surface is a conical tapered surface tapered forward;
The annular groove is formed along the conical tapered surface of the sealing surface, and the annular groove is in contact with the radially inner side surface of the annular seal portion fitted in the annular groove. A groove front side surface and a groove rear side surface that are in contact with the front side surface and the rear side surface of the annular seal portion, respectively, and an annular opening portion that opens to the sealing surface that is the conical tapered surface,
The rear side surface of the annular seal portion extends radially outward from the bottom surface of the annular groove and terminates just before reaching the opening that opens in the sealing surface, and extends forward from the end edge to the front side surface of the groove. The annular seal portion is radially outward and the front edge and its vicinity extend from the opening and project annularly from the opening, and the longitudinal section thereof is substantially triangular. A valve body configured such that a space having a triangular cross section is formed between the opening portion opened in the sealing surface and the radially outer surface of the annular seal portion . The valve body according to claim 1,
A valve structure comprising: a fluid passage that houses the valve body; and a valve housing having an annular valve seat surface formed on a wall surface of the fluid passage on the front side of the valve body.   The valve structure according to claim 2, wherein the valve seat surface is parallel to the sealing surface.   The annular seal portion is crushed between the valve seat surface when the valve body is in the closed position and the fluid pressure applied to the valve body exceeds a certain level, and the sealing surface is The valve structure according to claim 3, wherein the valve structure has an elastic coefficient that is deformed so as to abut against the valve.   A spring member that biases the valve body forward to the closed position is further provided, and when the valve body is in the closed position, the fluid pressure in front of the valve body exceeds a predetermined value when the valve body is in the closed position. Thus, the valve body is displaced rearward to allow the annular seal portion to be separated from the valve seat surface, so that the valve body functions as a check valve. 5. The valve structure according to any one of 4 above. One of the female-type and male-type joint members, comprising the valve structure according to any one of claims 2 to 4 for closing a flow path of the joint member; A joint member in which the valve body of the valve structure is displaced to the open position by the other joint member when the other joint member of the mold and the male joint member is connected.

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