JPH0710655U - Flange valve - Google Patents

Abstract

(57) [Abstract] [Purpose] In a valve with a flange, the flange can be moved in the axial direction so that the flange can be easily attached to and detached from the pipeline. [Structure] The connection cylinder part with a flange provided in the valve body 12 is divided into a ring-shaped flange 16 and a cylinder part 13.
The flange 16 is externally fitted to the tubular portion 13, and the convex portion 23 on the flange 16 side is fitted to the concave portion 15 on the tubular portion 13 side. Recess 15
Is wider than the convex portion 23. Flange 16 and tube portion 13
A seal member 25 is interposed between

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flanged valve.

[0002]

[Prior art]

 If a valve with a flange is used in a pipe such as a water pipe where the pipe and the valve are flange-connected, the valve must be installed or removed for maintenance or replacement. There is. At that time, when the valve is pulled out from the attachment point in the pipeline or fitted into the attachment point, there is a clearance space to help facilitate the work of fitting the valve into the attachment point and pulling it out. If it is not secured in the place, the work of mounting and removing the valve will be troublesome and difficult. This situation has often existed in old existing pipes that have been installed for a long time.

Therefore, as shown in FIG. 3, a loose flange 5 having an expansion / contraction function is interposed between the flange 2 on the valve 1 side and the flange 4 on the pipe 3 side to form a conduit. . The loose flange 5 is a pair of short pipes 6 and 7 fitted in a ring-shaped seal member 8 so as to be movable in the axial direction. The flange 6a of one short pipe 6 is attached to the flange 2 on the valve 1 side. The flange 7a of the other short pipe 7 is connected to the flange 4 on the pipe 3 side.

As described above, when the loose flange 5 having the expansion and contraction function is interposed between the valve 1 and the pipe 3, the above-mentioned space is secured at the mounting position when the valve 1 is mounted and removed. Therefore, the above-mentioned troublesomeness and difficulty of the mounting / removing work can be reduced.

[0005]

[Problems to be solved by the device]

 However, if the piping configuration as shown in FIG. 3 is adopted, each of the flanges 6a and 7a of the loose flange 5 must be connected to the flange 2 on the valve 1 side and the flange 4 on the piping 3 side, so that the number of flange connection points is reduced. There is a problem that not only the number of parts is increased and work efficiency is lowered, but also the number of parts is increased because extra loose flange 5 is required.

The present invention has been made in view of the above problems, does not require an extra component such as a loose flange, and has the same number of flange connection points as in the case where the loose flange is not used. Flange that can secure a clearance space at the installation location that helps to make it easier to fit the valve into or remove it from the installation location in the pipeline. The purpose is to provide a valve.

[0007]

[Means for Solving the Problems]

 In the flanged valve according to the present invention, the flanged connection cylinder part provided in the valve body is divided into a ring-shaped flange and a cylinder part, and the flange is externally fitted to the cylinder part and has an inner peripheral surface. Alternatively, a convex portion provided on one of the outer peripheral surfaces of the cylindrical portion is fitted in a concave portion which is provided on the other side and is wider than the convex portion so as to be movable in the axial direction, and the flange is prevented from coming off. A ring-shaped sealing member is interposed between the inner peripheral surface of the flange and the outer peripheral surface of the tubular portion.

[0008]

[Action]

 With the above configuration, the flange can be moved in the axial direction with respect to the tubular portion by the difference in the width dimension between the convex portion and the concave portion, and even when the flange is moved, the inner circumference of the flange can be changed. The gap between the surface and the outer peripheral surface of the cylindrical portion is tightly closed by the ring-shaped seal member. Further, since the concave portion regulates the moving width of the convex portion, the flange is prevented from falling out of the tubular portion.

[0009]

【Example】

 FIG. 1 is a partial sectional view of a valve A with a flange according to an embodiment of the present invention, and FIG. 2 is a partial arrow view of the flange 16 of the valve A as seen from the direction of arrow II in FIG.

In FIG. 1, reference numeral 12 denotes a valve body, which incorporates a valve body, a valve seat, etc., which are not shown. The internal structure of the valve body 12 is the same as that of a conventional valve and is well known, so a detailed description thereof will be omitted here. Reference numeral 13 denotes a tubular portion integrally formed with the valve body 12, and an internal passage 14 thereof communicates with the internal space of the valve body 12, and an annular groove is formed on the outer peripheral surface near the tip of the tubular portion 13. The recess 15 is formed. 16 is a flange. The flange 16 is divided from the cylindrical portion 13 and is formed by combining two semicircular half members 17, 17 into a ring shape as shown in FIG. That is, each half member 17, 17 has brackets 18, 18 at both ends in the circumferential direction, and these brackets 18, 18 are put together and tightened with fasteners 19 such as bolts and nuts to form a ring shape. Has been formed. Further, a ring-shaped convex portion 23 is provided on one end portion in the axial direction of the inner peripheral surface 22 of the flange 16, and an annular groove 24 is formed in an axially intermediate portion of the inner peripheral surface 22. A ring-shaped seal member 25 such as an O-ring is fitted in the.

The flange 16 is externally fitted to both sides of the tubular portion 13 before the two half members 17 and 17 are joined together, and then the two half members 17 and 17 are joined together. And the brackets 18, 18 are tightened by the fasteners 19. In this way, when the flange 16 is externally fitted to the cylindrical portion 13, the convex portion 23 is fitted to the concave portion 15. The flange 16 externally fitted to the tubular portion 13 is movable in the axial direction of the tubular portion 13, and the seal member 25 fitted in the annular groove 24 on the flange 16 side is the outer peripheral surface of the tubular portion 13. To closely close the gap between the inner peripheral surface of the flange 16 and the outer peripheral surface of the tubular portion 13.

Here, as shown in FIG. 1, the concave portion 15 is formed wider than the convex portion 23. Therefore, if the width dimension of the concave portion 15 is Ll and the width dimension of the convex portion 23 is L2, the flange 16 is movable in the axial direction of the tubular portion 13 by the dimension of L1-L2 (arrow X), and the concave portion 15 The flange 16 is prevented from slipping out of the tubular portion 13 by the engagement of the convex portion 23 with the convex portion 23. In FIG. 1, the moving width of the flange 16 is indicated by S.

In the above-described flanged valve A, if the flange 16 is moved to the left side in the figure, when the valve A is fitted into the installation location of the pipeline, a clearance space is secured at the installation location. So you can fit it easily. Then, by moving the flange 16 of the valve A fitted in the mounting location to the right side in the figure, the flange 4 on the pipe 3 side and the flange 16 can be flange-joined with a fastener 26 such as a bolt or nut. Is. In this case, the convex portion 23 does not always engage with the concave portion 15. Further, since the gap between the inner peripheral surface of the flange 16 and the outer peripheral surface of the cylindrical portion 13 is tightly closed by the seal member 25, fluid leakage does not occur from the gap.

When the valve A is removed from the pipeline, if the fastener 16 is removed and then the flange 16 is moved to the left side in the drawing, a clearance space is created between the flange 16 and the flange 4 on the side of the pipe 3. Valve A can be easily pulled out.

In FIG. 2, 27 indicates a hole for inserting a bolt as a fastener used for flange coupling.

In this embodiment, the convex portion 23 is provided on the flange 16 side and the concave portion 15 is provided on the cylindrical portion 13 side. However, the concave portion is provided on the flange 16 side and the convex portion is provided on the cylindrical portion side. Good. Further, since the seal member 25 may be interposed between the inner peripheral surface of the flange and the outer peripheral surface of the cylindrical portion, an annular groove is formed on the cylindrical portion 13 side, and the seal member 25 is formed in the annular groove. It may be fitted.

[0017]

[Effect of device]

 According to the flanged valve of the present invention, since the flange can be retracted with respect to the connection position with respect to the pipe side flange in the pipeline, by doing so, the valve can be installed in the pipeline. A space is secured at the mounting location when fitting it into or removing it from the mounting location. Therefore, it becomes possible not only to easily attach and detach the valve in the pipeline without using the loose flange described in FIG. 3, but also to remove the loose portion interposed in the existing pipeline. It becomes easy to replace a valve that you do not have. Further, since the flanged valve of the present invention prevents the flange from falling out of the tubular portion by fitting the convex portion and the concave portion, the number of parts does not increase even if the flange is divided from the tubular portion. There is an advantage.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a flanged valve according to an embodiment of the present invention.

FIG. 2 is a partial arrow view of the flange of the valve as viewed in the direction of arrow II in FIG.

FIG. 3 is a partial cross-sectional view of a state in which a conventional flange is attached to a pipe using a loose flange.

[Explanation of symbols]

 A Valve with flange 12 Valve body 13 Tubular portion 15 Recessed portion 16 Flange 23 Convex portion 25 Seal member

Claims (1)

[Scope of utility model registration request] 1. A flanged connection cylinder part provided in a valve body is divided into a ring-shaped flange and a cylinder part, and the flange is externally fitted to the cylinder part and an inner peripheral surface of the flange or the cylinder part. The convex portion provided on one of the outer peripheral surfaces is fitted in a concave portion that is provided on the other side and is wider than the convex portion so as to be axially movable to prevent the flange from being pulled out, and the inner peripheral surface of the flange. A flanged valve, characterized in that a ring-shaped seal member is interposed between and the outer peripheral surface of the tubular portion.