JP3020918U - Airtight stopper - Google Patents

Abstract

The present invention relates to an airtight stopper, and an object of the present invention is to provide an airtight stopper that can be commonly used for two types of pipes having the same outer diameter and different wall thicknesses. SOLUTION: A small diameter portion 13a having an outer diameter smaller than the inner diameter of a pipe 30 to be sealed, and a pipe 30 to be sealed.
Has an outer diameter equal to the outer diameter of
A main body member 10 having a large diameter portion 13b in which is formed and having a cylindrical portion 13 closed at one end, and the large diameter portion 13a of the main body member 10 having the large diameter portion 13b inserted into the end portion of the pipe. An annular victor joint 1 that can be airtightly covered across the boundary between the diameter portion 13b and the pipe 30.
1, an annular groove 18 for accommodating the victor joint 11, and an annular protrusion 20 for fitting in the annular groove 15 of the main body member 10, and is divided into two parts for opening and closing at one end thereof. It is configured so as to include a fastening member 12 which is freely pin-coupled and has a fastening means provided at the other end.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an airtight stopper. For more details, after repairing or laying the gas pipe, attach it to the end of the pipe to forcibly send gas into the pipe and remove air remaining in the pipe by so-called air purging work or via a joint. The present invention relates to an airtight stopper used for checking the airtightness (fusion test) after fusion of a plastic branch pipe to the plastic main pipe.

[0002]

[Prior art]

 The conventional airtight stopper is, in principle, screwed into a disc 1 and a screw hole provided in the center of the disc 1 as shown in FIG. A substantially barrel-shaped elastic sealing member (rubber or the like) 4 is inserted between the bolt 3 and the flange 2 and the disc 1.

Then, as shown in FIG. 1B, an elastic sealing member 4 is inserted into the end of the pipe 5 to be sealed, and the bolt 3 is rotated in a direction of compressing the elastic sealing member 4. As a result, the elastic sealing member 4 can be expanded in the radial direction and pressed against the inner diameter of the pipe 5 to hermetically seal it.

[0004]

[Problems to be solved by the device]

 The conventional airtight stopper has the following problems. In other words, according to the plastic pipe standard, there is one type of pipe with a nominal diameter of up to 75, but there are two types of pipes with a nominal diameter of 100, 150, 200 that have the same outer diameter but different wall thicknesses. It Therefore, for pipes with a nominal diameter of up to 75, one kind of airtight stopper should be prepared for each pipe diameter, but two kinds of airtight stoppers are required for pipes with a nominal diameter of 100 or more. The reason is that if the elastic sealing member 4 is made to correspond to a thick-walled pipe (immediately, the inner diameter is small), the elastic sealing member 4 is not expanded to a thin-walled pipe (that is, a large inner diameter). This is because it does not reach.

The present invention has been made in view of the above problems, and an object thereof is to realize an airtight stopper that can be commonly used for two types of pipes having the same outer diameter and different wall thicknesses.

[0006]

[Means for Solving the Problems]

 The airtight stopper of the present invention is a detachable airtight stopper that is attached to the end of a pipe and seals the opening, and has a small diameter portion 13a having an outer diameter smaller than the inner diameter of the pipe 30 to be sealed. A cylindrical portion 13 having an outer diameter equal to the outer diameter of the pipe 30 to be sealed and having a large diameter portion 13b having an annular groove 15 formed on the outer periphery thereof, and one end of the cylindrical portion 13 is closed. The body portion 10 integrally formed with the disc portion 14 and the small diameter portion 13a of the body member 10 straddling the boundary between the large diameter portion 13b and the pipe 30 when inserted into the end portion of the pipe. An annular victor joint 11 that can be airtightly covered with a rim, an annular groove 18 that accommodates the victor joint 11, and an annular protrusion 20 that fits into the annular groove 15 of the main body member 10. , And split into two Which is openably pin-connected at one end thereof, characterized by comprising; and a fastening member 12 is fastened with means provided on the other end. Further, the disk portion 14 of the main body member 10 is characterized by being provided with a screw hole 16 for mounting a coupler for connecting an air supply pipe.

In the present invention thus configured, as shown in FIG. 2, the boundary between the outer diameter of the pipe 30 to be sealed and the large diameter portion 13b of the main body member 10 inserted at the end of the pipe is defined. By sealing with the victoric joint 11 across the pipe, the pipe can be completely sealed regardless of the difference in the wall thickness of the pipe.

[0008]

[Embodiment of device]

 1A and 1B are views showing an embodiment of the present invention. FIG. 1A is a cross-sectional view taken along the line aa in FIG. 1B, and FIG. 1B is a Z arrow view in FIG. As shown in the figure, the present embodiment includes a main body member 10, a victor joint 11, and a tightening member 12. The main body portion 10 has a cylindrical portion 13 having a small diameter portion 13a having an outer diameter smaller than the inner diameter of the pipe to be sealed and a large diameter portion 13b having an outer diameter equal to the outer diameter of the pipe to be sealed, A disc portion 14 that closes the end of the cylindrical portion 13 is integrally formed, and an annular groove 15 is formed in the large diameter portion 13b. The screw hole 16 provided in the disk portion 14 is a screw hole to which a coupler for connecting an air supply pipe for supplying air for airtightness test from the outside into the pipe is attached.

The victor joint 11 is formed of a flexible and elastic material such as rubber into an annular shape, and its cross section is shaped like a tube that is axially cut and crushed. In addition, the annular inner diameter of the victor joint 11 is smaller than the outer diameter of the pipe to be sealed, and when fitted to the pipe, it comes into close contact with the outer periphery of the pipe and the outer periphery of the large diameter portion 13b of the main body member 10. ing.

The tightening member 12 has a ring shape having an inner diameter substantially equal to the outer diameter of the pipe to be sealed, and its cross section has an annular groove 18 for accommodating the victor joint 11 and a hollow. It has a groove 19 and an annular protrusion 20 that can be fitted into the groove 15 of the main body member 10, and has a non-slip tooth profile 21 formed on the surface in contact with the pipe. The ring-shaped member is divided into an upper tightening member 12a and a lower tightening member 12b along a line passing through the center, a hinge portion 22 is formed at one end of each, and a hinge pin 23 opens and closes both members. Are combined as possible. A fastening portion 24 is provided at the other end.

The tightening portion 24 includes upper and lower tightening members 12 a. Fork-shaped projections 25 and 26 are formed on 12b, a clamp bolt 28 is attached to the projection 26 of the lower tightening member with a pin 27, and a clamp bolt 28 that passes through the projection 25 is screwed onto the upper tightening member 12a. A clamp knob 29 is provided.

The present embodiment having such a configuration is used as shown in FIG. First, the clamp knob 29 is loosened, the small diameter portion 13 of the main body member 10 is fitted into the pipe 30 to be sealed, and it is pushed until it comes into contact with the stepped portion formed by the small diameter portion 13a and the large diameter portion 13b. To fix the tightening member 12 to the pipe 30.

After that, an air tightness test can be performed by sending compressed air through a coupler (not shown) attached to the screw hole 16 of the main body member 10. At this time, the victor joint 11 is inflated by the pressure of the air sent into the pipe 30, as shown in FIG. Since it is pressed by 13a, airtightness can be maintained. Further, since the tooth profile 21 formed on the inner diameter portion of the tightening member 12 bites into the outer periphery of the pipe 30, it prevents the main body member 10 from coming off the pipe 30 by the air pressure applied to the disc portion 14 of the main body member 10. can do.

[0014]

[Effect of device]

 According to the present invention, it is possible to seal regardless of the wall thickness of the pipe by bringing the victoric joint into close contact across the boundary between the outer periphery of the main body member attached to the end of the pipe and the outer periphery of the pipe. Thus, it is possible to realize an airtight stopper that can be used commonly with a plurality of types of pipes having the same diameter and different wall thicknesses.

[Brief description of drawings]

1A and 1B are views showing an embodiment of the present invention, in which FIG. 1A is a sectional view taken along the line aa in FIG. 1B, and FIG. 1B is a Z arrow view in FIG.

2A and 2B are views for explaining a method of using the embodiment of the present invention, in which FIG. 2A is a sectional view and FIG. 2B is an enlarged sectional view of a portion B in FIG. 2A.

FIG. 3 is a sectional view showing a conventional airtight stopper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Main body member 11 ... Victory joint 12 ... Tightening member 13 ... Cylindrical part 13a ... Small diameter part 13b ... Large diameter part 14 ... Disc part 15, 18 ... Annular groove 16 ... Screw hole 19 ... Recessed groove 20 ... Annular Projection 21 ... Tooth profile 22 ... Hinge part 23 ... Hinge pin 24 ... Tightening part 25, 26 ... Fork-shaped projection 27 ... Pin 28 ... Clamp bolt 29 ... Clamp knob 30 ... Pipe

Claims (2)

[Scope of utility model registration request] 1. A removable airtight stopper which is attached to an end of a pipe and seals the opening thereof, the small-diameter portion (13a) having an outer diameter smaller than the inner diameter of the pipe (30) to be sealed, It has an outer diameter equal to the outer diameter of the pipe (30) to be sealed and has an annular groove (1
(5) A large-diameter portion (13b) formed in a cylindrical portion (13) and a disc member (14) closing one end of the cylindrical portion (13) are integrally formed into a main body member ( 10) and when the small diameter portion (13a) of the main body member (10) is inserted into the end portion of the pipe, it can be airtightly covered across the boundary between the large diameter portion (13b) and the pipe (30). An annular victor joint (11), an annular groove (18) for accommodating the victor joint (11), and an annular groove (15) of the main body member (10).
With a ring-shaped projection (20) that fits into the same, and is divided into two parts, and has one end thereof openably and closably pin-coupled, and the other end is provided with a fastening member (12). An airtight stopper characterized by being provided. 2. A disc portion (14) of the body member (10).
The airtight stopper according to claim 1, characterized in that a screw hole (16) for attaching a coupler for connecting an air supply pipe is provided in the airtight stopper.