JP2015010621A - Clamp with leak port and joint and valve with the clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp that eliminates the need for performing a leakage test in the whole circumference and is capable of reliably detecting leakage by only one place test, and to provide a joint and a valve with the clamp.SOLUTION: A clamp includes: a clamp body comprising an annular member with a circumferential portion formed openably, and including a recess formed along the circumferential direction in the inner diameter part of the annular member; and a resin member having a recessed groove in an inner circumferential surface with an annular shape and having the recessed groove arranged in the recess of the clamp body so as to face radially inward. The resin member is formed of a flow path from the inner circumferential side to the outer circumference side at the circumferential portion. The clamp body includes a leak port comprising a through hole penetrating through the inner circumferential surface and the outer circumferential surface of the clamp body in the position corresponding to the flow path.

Description

  The present invention relates to a clamp used for connecting and fixing flanges and ferrules of pipes or between a valve bonnet and a valve body. Specifically, a leak fluid channel and a leak port communicating with the channel are provided. The present invention relates to a clamp capable of reliably detecting a leak with only one inspection without the need for a leakage inspection all around the circumference, and a joint and a valve including the clamp.

  Conventionally, a clamp is used when connecting a pipe such as a vacuum apparatus. Specifically, a flange or ferrule is formed at the joint end of the pipe, the contact surfaces of the flange or ferrule are butted together so as to sandwich the gasket or O-ring, and the taper surface of this butted portion is fastened and fixed using a clamp By doing so, the fluid flowing through the pipe is prevented from leaking (leaking) to the outside.

  In Patent Document 1, a ring-shaped holding member having a seal member such as an O-ring is interposed on the outer periphery between a pair of tubes having a flange formed at the tip, and a filter is provided in the holding member. A joint for a vacuum apparatus is described in which the flange is clamped.

A clamp is also used when connecting the valve bonnet and the valve body.
Patent Document 2 describes a clamp that abuts the rim of the bonnet and a flange formed on the opening of the valve body to connect the bonnet of the valve to the valve body, and clamps and fixes the outer periphery of the butt. Has been.

  However, in the clamps described in Patent Documents 1 and 2, when the fluid leakage (leakage) is confirmed after construction, the contact surface of the flange is hidden by the clamp, so the presence or absence of leakage can be detected quickly. It was difficult. In addition, since it is not known in which part of the circumferential direction the leak portion exists, it is necessary to check by applying a leakage test solution over the entire circumference in the vicinity of the flange contact surface in order to detect the leak. There was a problem that it was easy to overlook. In addition, there is a problem that the inspection takes time and labor.

In order to solve these problems, Patent Document 3 describes a clamp in which a through hole is provided between the inner and outer peripheral surfaces of a split ring, and the He ring is attached to the O-ring seal through the through hole. It is described that it is possible to carry out leak inspection reliably and in a short time by blowing gas.
However, in the clamp described in Patent Document 3, when the leak is slight, the leak fluid is accumulated between the clamp inner peripheral surface and the flange outer peripheral surface of the pipe and is not discharged to the outside from the through hole. There was a possibility that a leak could not be detected.

Utility Model No. Sho 63-30694 Japanese Patent Publication No. 43-6034 JP 63-53387 A

  The present invention has been made in order to solve the above-described problems, and it is not necessary to perform a leak inspection all around the clamp, and the clamp capable of reliably detecting a leak by a single inspection. A joint and a valve provided with the above are provided.

  The invention according to claim 1 comprises a clamp body comprising a ring-shaped member formed so that at least a part of the circumference thereof can be opened, and a recess formed along the circumferential direction on the inner diameter portion of the ring-shaped member, and an annular shape And a resin member disposed in the concave portion of the clamp body so that the concave groove is directed radially inward, and the resin member is formed in a part of a circumference. A flow path is formed from the peripheral side to the outer peripheral side, and the clamp main body includes a leak port including a through hole penetrating the inner peripheral surface and the outer peripheral surface of the clamp main body at a position corresponding to the flow path. It is related with the clamp characterized.

  The invention according to claim 2 is characterized in that the clamp body is composed of a split ring-shaped member whose one ends are rotatably connected and the other end is openable. Regarding clamps.

  The invention according to claim 3 relates to the clamp according to claim 1, wherein the clamp main body is formed of a ring-shaped member having two or more connecting portions and not less than 30%.

  The invention according to claim 4 relates to the clamp according to claim 1, wherein the clamp main body is formed of a split ring-shaped member formed without connecting one end of a pair.

  The invention according to claim 5 is characterized in that the clamp main body includes a stopper for a resin member that is formed in the vicinity of the leak port and that protrudes inward in the radial direction. It relates to the clamp described in 1.

  The invention according to claim 6 relates to the clamp according to any one of claims 1 to 5, wherein the resin member is composed of two or more arc-shaped members.

  According to a seventh aspect of the present invention, cylindrical ferrules having flanges at their end portions are butted against each other on the flange surface, and the butted portions are fastened by the clamp according to any one of the first to sixth aspects. It relates to a characteristic joint.

  According to an eighth aspect of the present invention, there is provided a valve body having an inlet flow path, an outlet flow path, and a valve seat, and a fluid flowing from the inlet flow path to the outlet flow path by contacting and separating from the valve seat. A diaphragm for allowing or blocking flow and a bonnet for sandwiching the diaphragm between the valve body, and a connection portion between the valve body and the bonnet is fastened by a clamp according to any one of claims 1 to 6. It is related with the valve | bulb characterized by becoming.

  According to the first aspect of the present invention, an annular resin member having a groove on the inner peripheral surface is formed in the recess formed along the circumferential direction on the inner diameter portion of the annular member forming the clamp body. Is arranged so as to face inward in the radial direction, when the fluid flowing through the pipe leaks, the leaked fluid flows through the concave groove. The resin member has a flow path formed in a part of the circumference from the inner peripheral side to the outer peripheral side, and the clamp body passes through a through hole penetrating the inner peripheral surface and the outer peripheral surface of the clamp body at a position corresponding to the flow path. The leak fluid that has flowed through the concave groove of the resin member is surely discharged from the leak port to the outside. The presence or absence can be reliably inspected.

  According to the invention which concerns on Claims 2-4, workability | operativity at the time of attaching a clamp main body to fastening object members, such as a flange, can be improved.

  According to the fifth aspect of the invention, the resin member blocks the leak port because the clamp body includes the stopper for the resin member that is formed in the vicinity of the leak port and protrudes radially inward. Thus, the leak fluid can be reliably discharged from the leak port to the outside.

  According to the invention which concerns on Claim 6, the workability | operativity at the time of attachment to fastening target members, such as a flange, can be improved because the resin member is comprised by two or more circular-arc-shaped members.

  According to the seventh aspect of the present invention, cylindrical ferrules having flanges at the ends are butted against each other on the surface of the flange, and the butted portions are fastened by the clamp according to any of claims 1 to 6. Thereby, it can be set as the coupling which can test | inspect the presence or absence of a leak reliably only by applying a leakage test | inspection liquid to the leak port exit of the outer diameter part of a clamp main body.

  According to the eighth aspect of the present invention, the valve body having the inlet passage, the outlet passage, and the valve seat, and the valve seat abuts and separates from the inlet passage to the outlet passage. A diaphragm for allowing or blocking fluid flow and a bonnet for sandwiching the diaphragm between the valve body, and a connection portion between the valve body and the bonnet is fastened by a clamp according to any one of claims 1 to 6. As a result, it is possible to provide a valve that can reliably inspect the presence or absence of a leak simply by applying a leak test solution to the leak port outlet of the outer diameter portion of the clamp body.

It is a perspective view which shows the use condition of the clamp which concerns on this invention, and the coupling which concerns on this invention. It is a figure which shows the use condition of the clamp which concerns on this invention, and is a perspective view when a clamp is opened. It is a figure which shows the use condition of the clamp which concerns on this invention, and is a top view when a clamp is opened. It is a side view of the clamp concerning the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is sectional drawing which shows the connection part of the bonnet of a valve | bulb which concerns on this invention, and a valve body. It is a top view which shows another embodiment of the clamp which concerns on this invention. It is a top view which shows another embodiment of the clamp which concerns on this invention.

  Hereinafter, a clamp according to the present invention, a joint including the clamp, and a valve will be described with reference to the drawings.

First, the structure of the clamp of the present invention will be described.
FIG. 1 is a perspective view showing a use state of a clamp according to the present invention, and FIG. 2 is a perspective view when the clamp according to the present invention is opened.

The clamp (10) is formed of a ring-shaped member formed so that at least a part of its circumference can be opened. For example, as shown in FIG. 1, one end is rotatably connected and the other end is opened. The clamp main body (1) which consists of a half ring-shaped member (2a, 2b) is provided.
One ends of the ring-shaped members (2a, 2b) are connected by a hinge (9) and are connected to each other so as to be rotatable. Thereby, the other end facing the side provided with the hinge (9) can be opened, and the clamp (10) can be fixed to the fastening object.
The ring-shaped member (2a) includes a thumbscrew (8) at the other end of the hinge (9), and the fastening target can be fixed by tightening the thumbscrew (8) to the ring-shaped member (2b).
The structure to be fixed is not limited to the butterfly screw (8), and may be any structure as long as the ring-shaped members (2a) and (2b) can be fixed.

The clamp body (10) is not limited to the structure as shown in FIG. 1, but as shown in FIG. 10, it has two or more connecting parts (for example, hinges) (9), and has a ring shape of 30% or more. It is good also as a structure which consists of members (2a, 2b, 2c).
Moreover, as shown in FIG. 11, the clamp body (10) can be fastened to each other with bolts (8a), nuts (8b), etc., without connecting one end of the pair with a hinge or the like. It may be composed of a split ring-shaped member.

  The clamp body (1) includes a recess (3) formed along the circumferential direction in the inner diameter portion (6) of the ring-shaped member (2a, 2b). The recess (3) has a shape corresponding to the fastening object, and is preferably formed at substantially the center in the axial direction.

FIG. 3 is a diagram showing a usage state of the clamp according to the present invention, and is a plan view when the clamp is opened. 5 is a cross-sectional view taken along the line AA in FIG.
A resin member (14) having an annular shape and a concave groove (15) on the inner peripheral surface is inserted into the concave portion (3) of the clamp body (1). The resin member (14) is arranged such that the concave groove (15) faces inward in the radial direction.

As shown in FIG. 3, the resin member (14) has a flow path (16) formed in a part of the circumference from the inner periphery side to the outer periphery side. A plurality of flow paths (16) may be provided. For example, the flow paths (16) may also be provided on the ring-shaped member (2b) side in FIG. The groove (15) and the leak port (4) can be connected by the flow path (16).
The resin member (14) can form the flow path (16) by dividing an annular part and forming a cut portion. Moreover, the resin member (14) may be formed of two or more arc-shaped members, and the flow path (16) may be formed by disposing the arc-shaped members at intervals.
Moreover, the workability of attaching the resin member (14) to the fastening target can be improved by forming the resin member (14) from two or more arc-shaped members.

6 is a cross-sectional view taken along the line BB of FIG. Please refer to FIG. 2 again in conjunction with FIG.
In the recess (3) of the clamp body (1), a leak port comprising a through hole penetrating the inner peripheral surface (6) and the outer peripheral surface (7) of the clamp body (1) at a position corresponding to the flow path (16). (4) is provided. The circumferential width of the flow path (16) is set larger than the diameter of the leak port (4) so that the leak port (4) is not blocked by the resin member (14). In addition, in order to prevent the position of the resin member (14) from being shifted and the width of the cut portion forming the flow path (16) from being narrowed, the vicinity of the leak port (4) of the recess (3) It is preferable to provide a resin member stopper (5) comprising a protruding portion protruding radially inward. Thereby, the width | variety of the flow path (16) of the resin member (14) can be maintained more than a fixed distance, and it prevents that the position of the resin member (14) shifts | deviates and blocks the leak port (4). Can do.
The position of the stopper (5) for the resin member is not particularly limited as long as it can prevent the leak port (4) from being sealed, but considering that it does not hinder the flow of the leak fluid, FIG. As shown, it is preferably provided above and below the leak port (4). Further, the number of resin member stoppers (5) is not limited, and two may be formed for one leak port (4) as shown in FIG. 3, and one or three or more are formed. May be.

  Next, the usage method of the clamp (10) of this invention is demonstrated. Hereinafter, although connection fixation of piping is demonstrated, the use object of the clamp of this invention is not limited to this.

As shown in FIGS. 5 and 6, a ferrule (11) is provided at the end of the pipe, and the ferrule (11) has a flange at the end. A concave surface (12) is formed in the vicinity of the outer periphery over the entire circumference on the contact surface of the flange of the ferrule (11). The contact surfaces are abutted so as to sandwich a gasket (13) having a convex portion corresponding to the concave portion (12).
In addition, about the shape etc. of the gasket (13) provided with the convex part corresponding to the recessed part (12) of a ferrule (11) and a recessed part (12), it does not specifically limit and the fluid in piping does not leak outside. Any structure may be used as long as the structure is sealed.

  Next, the resin member (14) is fixed to the outer peripheral portion of the ferrule (11) so that the groove (15) faces inward in the radial direction. At this time, the concave groove (15) covers the butted portion (gasket portion) of the ferrule (11). Next, as shown in FIG. 2, the thumb screw (8) side of the clamp body (1) is opened, and the annular member (2b) is fixed to the ferrule (11) on which the resin member (14) is arranged. When the thumbscrew (8) is fastened to the annular member (2b), the tapered surface of the ferrule (11) is pressed by the tapered surface of the annular member (2a, 2b) as shown in FIG. Thereby, the ferrules (11) are connected and fixed in a state where the fastening force is maintained.

4 is a side view of the clamp according to the present invention, and FIG. 7 is a cross-sectional view taken along the line CC in FIG.
When the fluid in the pipe leaks from the contact surface of the ferrule (11), the leaked fluid flows through the concave groove (15) of the resin member (14). Since the resin member (14) has the flow path (16) in a part of the circumference, the leak fluid is concentrated in the flow path (16).

Since the clamp body (1) includes the leak port (4) at a position corresponding to the flow path (16), the leak fluid that has passed through the concave groove (15) of the resin member (14) 4) and discharged to the outside (in the direction of the arrow in FIG. 7).
That is, when there is a leak, the leak fluid is surely discharged from the leak port (4) to the outside, so that the leak test can be performed simply by applying the leak test solution to the outlet of the leak port (4). . And a leak can be detected reliably.
The position and the number of the leak ports (4) can be changed so as to be provided in plural according to the position and the number of the flow paths (16) formed in the resin member (14).

8 is a cross-sectional view taken along the line DD of FIG.
The resin member stopper (5) formed in the vicinity of the leak port (4) allows the flow path (16) to maintain a certain distance or more, so that the leak fluid is reliably discharged from the leak port (4). be able to.

The present invention also includes a joint and a valve using the clamp (10).
As shown in FIGS. 5 and 6, in the joint according to the present invention, cylindrical ferrules (11) each having a flange at the end are butted against each other on the surface of the flange, and the butted portion is a clamp (10 ).

FIG. 9 is a cross-sectional view showing a connection portion between the bonnet and the valve body of the valve according to the present invention.
The valve according to the present invention comprises a valve body (20) having an outlet channel (not shown) and a valve seat (18) formed at symmetrical positions with respect to the inlet channel (17) and the inlet channel (17). I have.
The valve according to the present invention has a diaphragm (19) that allows or blocks the flow of fluid from an inlet channel (17) to an outlet channel (not shown) by contacting and separating from the valve seat (18). ) And the valve body (20), a bonnet (21) is provided to sandwich the diaphragm (19). And the valve body (20) and a bonnet (21) are connected and fixed by the outer side of the connection part of a valve body (20) and a bonnet (21) being fastened by the clamp (10) which concerns on this invention.

  Since the joint or valve according to the present invention includes the clamp (10), the joint or valve can easily be detected while maintaining the fastening force.

  INDUSTRIAL APPLICABILITY The present invention is used as a clamp used when connecting and fixing flanges and ferrules of piping or a valve bonnet and a valve body.

DESCRIPTION OF SYMBOLS 1 Clamp main body 2a, 2b, 2c Ring-shaped member 3 Recessed part 4 Leak port 5 Stopper 6 for resin members Inner peripheral surface (inner diameter part)
7 outer peripheral surface 8 butterfly screw 8a bolt 8b nut 9 hinge 10 clamp 11 ferrule 12 recess 13 gasket 14 resin member 15 recess groove 16 channel 17 inlet channel 18 valve seat 19 diaphragm 20 valve body 21 bonnet

Claims (8)

A clamp body comprising a ring-shaped member formed so that at least a part of the circumference can be opened, and a recess formed along the circumferential direction on an inner diameter portion of the ring-shaped member;
A resin member disposed in the concave portion of the clamp body so that the groove has an annular shape and has a concave groove on an inner peripheral surface thereof, and the concave groove faces radially inward,
The resin member has a flow path formed on a part of the circumference from the inner circumference side to the outer circumference side,
The clamp body includes a leak port including a through hole penetrating an inner peripheral surface and an outer peripheral surface of the clamp main body at a position corresponding to the flow path.   The clamp according to claim 1, wherein the clamp body is formed of a split ring-shaped member having one end rotatably connected and the other end openable.   The clamp according to claim 1, wherein the clamp main body is formed of a ring-shaped member having two or more connecting portions and at least 30%.   The clamp according to claim 1, wherein the clamp body is composed of a split ring-shaped member formed without connecting one ends of a pair.   The clamp according to any one of claims 1 to 4, wherein the clamp body includes a stopper for a resin member that is formed in the vicinity of the leak port and protrudes inward in the radial direction.   The clamp according to claim 1, wherein the resin member is composed of two or more arc-shaped members.   A cylindrical ferrule having a flange at an end is abutted against each other on the surface of the flange, and the abutting part is fastened by the clamp according to any one of claims 1 to 6. A valve body having an inlet channel, an outlet channel and a valve seat;
A diaphragm that allows or blocks the flow of fluid from the inlet channel to the outlet channel by abutting and separating from the valve seat;
A bonnet for sandwiching the diaphragm with the valve body;
The valve | bulb characterized by the connection part of the said valve body and the said bonnet being fastened by the clamp in any one of Claims 1 thru | or 6.