JP3505141B2 - Sealing test stopper device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airtightness test plug device for testing the airtightness of a conduit for inserting a communication cable or the like, and more particularly to a structural improvement thereof.

[0002]

2. Description of the Related Art As shown in FIG.
Pipe line 7A that is laid between the two and through which a communication cable is inserted,
Since 7B is actually configured by connecting a plurality of pipes, airtightness may be impaired at the pipe connection portion. Therefore, conventionally, both openings of the pipe line 7A to the manholes M1 and M2 are closed by plug devices S1 and S2 described in detail later,
In this state, compressed air having a predetermined pressure (for example, 0.5 kgf / cm 2) is supplied from the compressor 81 through the hose 82 to the pipeline 7.
The air-tightness is determined based on the value indicated by the pressure gauge 83.

A stopper device S1 used for this is, for example, as shown in FIG. 4, and a pair of cylindrical rubber members 101, 10 are used.
2 are installed side by side via the spacer plate 103, and the shaft member 104 is inserted through these central openings. Shaft member 10
A ventilation hole 105 is formed at the center of the through hole 4. The end plate 106 is brought into contact with the side surface of the rubber body 101, and this is joined and fixed to the threaded portion at the tip of the shaft member 104 with the nut 107, while the end plate 108 is brought into contact with the side surface of the rubber body 102, and One end of a pipe body 109 having the shaft body 104 inserted therein is brought into contact with the end plate 108. At the other end of the pipe body 109, a nut body 110 coupled to the outer peripheral threaded portion of the shaft member 105 is in contact, and at the base end of the shaft member 105, a coupler 111 for connecting a hose 82 (see FIG. 3).
Is attached.

Such a plug device S1 has a manhole M2.
The rubber bodies 101 and 102 are inserted into the tube body 74 connected to the duct sleeve 72 of FIG. 3 via the packing 73, the nut body 110 is screwed in, and the end plates 107 and 108 are inserted via the pipe body 109. Are moved toward each other to compress the rubber bodies 101 and 102, and these are bulged outward in the radial direction. As a result, the outer circumferences of the rubber bodies 101 and 102 are brought into close contact with the inner circumference of the opening of the tube body 74 to close them. The plug device S is also attached to the pipe body of the pipe line 7A that opens to the manhole M1.
1 is attached and the hose 82 is not connected here, so the hermeticity is maintained by the coupler 111. Then, compressed air is supplied from the compressor 81 to the inside of the conduit 7A closed by the plug device S1 through the ventilation hole 105 of the plug device S1 to which the hose 82 is connected.

[0005]

By the way, in the above-described conventional plug device S1, the nut body 110 is screwed in using a tool such as a spanner. However, a plurality of conduits are provided on the side wall of the manhole M2 (FIG. 3). When 7A and 7B are provided adjacent to each other, the manholes M1 and M2 are opened from the openings of the respective pipelines 7A and 7B.
Since the wrench interferes with the base end of the shaft member 104 of the stopper device S1 protruding inward, it cannot be rotated unless it is replaced, and there is a problem that it takes time to work. In particular, when the cable has already been drawn into the adjacent conduits 7A and 7B, the interference with the conduit increases the time and effort for changing the spanner. Further, when the nut body 110 is screwed in, the pipe body 1
Due to the resistance received from 09, the threaded portion of the nut body 110 gradually wears and the rotation resistance increases as the use progresses. As a result, the proper tightening force becomes unclear, and the nut body 1
When the tightening of 10 is weak, the bulging of the rubber bodies 101 and 102 is not sufficient, so the stopper device S2 causes the tube body 7 to move due to compressed air pressure.
4 and the tightening is too strong, the rubber body 101,
Due to excessive swelling of 102, the vinyl pipe is deformed, and in the steel pipe or the like, the rubber bodies 101 and 102 are excessively deformed and damaged.

Therefore, the present invention solves such a problem, and an object thereof is to provide a plug device for airtightness test of a pipe body which is excellent in workability and can always obtain an appropriate closing force of the pipe body. And

[0007]

In order to achieve the above object, a plug device for airtightness test of a tube body of the first invention is a ring-shaped elastic body (1A, 1B) and an elastic body (1A, 1B). ), A first end plate (22) integrally provided at the tip of the shaft (3) and abutting on one side surface (1A) of the elastic body, A second end plate (23) that is mounted around the body (3) so as to be relatively movable in the axial direction and contacts the other side surface of the elastic body (1B), the second end plate (23), and the shaft body (3). ) Is detachably erected between the engaging portion (53) provided on the () and the erection end (612, 622) by lever operation.
The distance between them increases or decreases, and when the distance increases, the first end plate (22) or the second end plate (23) is moved so that the relative distance between the two becomes smaller, and the elastic body (1A, 1B) is radially outward. It is provided with an operating tool (6) for bulging to and a positioning member (51) for positioning the first end plate (22) and the second end plate (23) having a small relative distance in this state. Book first
In the present invention, the elastic body of the stopper device is inserted into the tubular body, and the distance between the erected ends of the operating tool is increased by the lever operation to reduce the relative distance between the end plates, which results in the elasticity between the end plates. The body is bulged outward in the radial direction so as to be in close contact with the inner circumference of the tubular body, and the duct is closed. According to the first aspect of the present invention, the relative spacing between the end plates can be easily reduced by operating the lever of the operating tool, and thus the workability is excellent, and the relative spacing between the end plates is always almost constant by the lever operation. Since it can be reduced by a certain amount, an appropriate tube closing force can be obtained. Further, since the operating tool is detachable, it can be detached from the stopper device and shared with other stopper devices, and the cost can be reduced. In addition, since the plug device without the operation tool has a compact outer shape, it is possible to efficiently mount the plug device on a large number of adjacent pipes at the same time to efficiently perform the airtight test. in this case,
The elastic body may be a rubber body. In this case, the rubber body does not have to be singular and a plurality of rubber bodies may be provided.

According to the second aspect of the present invention, in the airtightness test plug device for a tubular body according to the first aspect of the present invention, a pipe body (4) through which the shaft body (3) is inserted is provided, and one end of the pipe body (4) is provided. The locking portions (42, 43, 44) are provided on the outer periphery of the pipe body (4) while being brought into contact with the second end plate (23), and the locking portions (42 to 44) and the shaft body (3). An operating tool (6) is provided between the locking part (53) and the locking part (53). In the second aspect of the present invention, since the operating tool is brought into contact with the end plate through the pipe body, the installation position of the end plate and the mounting position of the operating tool can be provided separately.

According to the third aspect of the present invention, in the airtightness test plug device for a pipe according to the second aspect of the present invention, a plurality of locking portions (42 to 44) of the pipe (4) are provided at different positions in the axial direction. In the third aspect of the present invention, one of the plurality of locking portions of the pipe body is appropriately selected according to the pipe body to be tested, so that the lever operation of the operating tool is made constant and the distance between the erection ends is made constant. However, the relative distance between the end plates is appropriately changed, and the bulging amount of the elastic body is changed accordingly, so that the outer circumference of the elastic body can be appropriately brought into close contact with the inner circumference of the pipe having a different inner diameter.

In the fourth invention, in the airtight test stopper device of the second invention or the third invention, a nut body (51) screwed to the outer periphery of the shaft body (3) is provided, and the nut is provided. The body (51) is brought into contact with the other end of the pipe body (4) to form the positioning member. In the fourth invention, the positioning member can be easily realized. When positioning with the nut body, it is sufficient to rotate the nut body in a state where the relative distance between the end plates is reduced by a predetermined amount by the operation tool, so that the rotation operation of the nut body does not require a tool. It can be done lightly.

In the fifth invention, the first invention to the fourth invention are provided.
In the plug device for an airtight test of a tube body according to any one of the inventions, a second lever in which the operation tool (6) is rotatably coupled to the first lever body (61) and the first lever body (61). The lever body (62) and the lever body (61, 6)
By rotating and opening and closing 2), the erection end (61
2, 622) is increased or decreased. According to the fifth aspect of the present invention, the operating tool can be realized with a simple structure.

The reference numerals in the parentheses indicate the correspondence with the specific means described in the embodiments described later.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an overall sectional view of a stopper device S. This stopper device S is used in place of the conventional stopper device S2 (see FIG. 3). In FIG. 1, a pair of ring-shaped rubber bodies 1A and 1B are provided side by side via a spacer plate 21, and these rubber bodies 1A and 1B each have a "8" -shaped cross-sectional shape in which a pair of circles are attached. . The shaft member 3 is inserted through the centers of the rubber bodies 1A and 1B, and the vent holes 31 reaching both ends thereof are formed through the center of the shaft member 3. An end plate 22 is brought into contact with the side surface of the rubber body 1A, and this is joined and fixed to a screw portion 32 at the tip of the shaft member 3 with a nut 33. On the other hand, the end plate 2 is provided on the side surface of the rubber body 1B.
3 is brought into contact with the end plate 23, and one end of a pipe body 4 arranged so as to cover the shaft body 3 is in contact therewith. The spacer plate 21 and the end plate 23 are movably fitted in these central openings through the shaft member 3. A thick disc-shaped posture stabilizing rubber body 41 is attached to the outer periphery of the middle portion of the pipe body 4. Further, locking pieces 42, 43 and 44 are provided at three positions on the outer circumference of the pipe body 4 at different positions in the longitudinal direction so as to project.
These locking pieces 42 to 44 are actually formed by changing their positions in the circumferential direction and formed at equal intervals of 120 degrees, and concave portions 45 are formed on the side surfaces thereof. The other end of the pipe body 4 is in contact with the nut body 51 connected to the outer peripheral thread portion 34 of the shaft member 3, and the base end of the shaft member 3 is a coupler for connecting a hose 82 (FIG. 3). 52 is attached. Also,
A disk-shaped locking plate 53 is attached to the outer peripheral screw portion 34.

An operating tool 6 is provided, which is composed of a long lever body 61 and a short lever body 62 branched from the long lever body 61. A plan view of the operation tool 6 is shown in FIG. Lever body 6
The tip portion 611 of the first member is bifurcated into a U shape, and a locking pin 612 is provided between the left and right side walls of the tip portion 611. On the other hand, the lever body 62 is formed into a substantially U-shape in plan view, bends in a V shape in a side view (FIG. 1), and is provided between the open ends of the pin member 6.
21 penetrates the side surface of the lever body 61 and is rotatably connected thereto. The lever bodies 61 and 62 of the operation tool 6 are shown in FIG.
In the state in which the operating tool 6 is wide open as indicated by the chain line, the distance between the locking pin 612 at the tip of the lever body 61 and the base end 622 of the lever body 62, which is the erected end of the operation tool 6, is d1.

When using such a stopper device S,
The rubber body 1 is provided in the pipe body 74 connected to the duct sleeve 72 of the manhole M2 (see FIG. 5) through the packing 73.
A and 1B are inserted and the posture stabilizing rubber body 41 is positioned in the reduced diameter manhole side opening 721 of the duct sleeve 72 to stabilize the posture of the entire stopper device S. Then, as shown by the arrow in FIG. 1, the locking pin 612 at the tip of the lever body 61 of the operation tool 6 is fitted into one recess 45 of the locking pieces 42 to 44, and the base end 622 of the lever body 62 is locked. Board 53
To be attached to the stopper device S.

When the lever body 61 is rotated toward the lever body 62 and closed so that the angle formed by them is reduced, the distance between the locking pin 612 and the base end 622 of the lever body 62 becomes d1. It extends to a longer d2. As a result, the shaft body 3 in the pipe body 4 is pulled out to the right in FIG.
The distance between the end plate 22 and the end plate 23 becomes smaller, and the rubber bodies 1A and 1B are bulged and deformed outward in the radial direction, and the outer circumference thereof closely adheres to the inner circumferential surface of the tube body 74 (FIG. 5). To be made. In this state, the nut body 51 separated from the end surface of the pipe body 4 by pulling out the shaft body 3 is screwed in again until it comes into contact with the end surface of the pipe body 4. Then, the operation tool 6 is opened to increase the angle formed by the lever bodies 61 and 62, and the locking pin 612 is
The distance between the locking body 42 and the base end 622 of the lever is shortened, and the operation tool 6 is removed from between the locking piece 42 and the locking plate 53. Even if the operation tool 6 is removed, the nut body 51 abuts on the end surface of the pipe body 4 to prevent the shaft body 3 from returning, so that the rubber bodies 1A and 1B remain expanded and deformed. The outer periphery maintains a close contact with the inner peripheral surface of the tubular body 74. In this state, compressed air is supplied through the ventilation hole 31 into the conduit 7A closed with the conventional stopper device S1 (FIG. 3), and an air tightness test is performed.

The operating tool 6 removed from the stopper device S is used to operate the stopper device S installed in another pipeline.
When the stopper device S is to be removed from the tube body 74 after the airtight test, the lever bodies 61 and 62 of the operation tool 6 are again positioned between the recess 45 of the locking piece 42 and the locking plate 53, and these levers are moved. The bodies 61 and 62 are once opened, the contact state of the nut body 51 with the end surface of the pipe 4 is released, and the nut body 51 is returned and rotated. Then, when the lever bodies 61 and 62 of the operation tool 6 are closed, the shaft body 3 moves back in the pipe body 4 to move the rubber body 1.
A and 1B return to the original shape from the bulging state. As a result, the entire stopper device S can be taken out of the tube 74. Here, even if the inner diameter of the tubular body 74 has the same nominal diameter, there is a difference of several mm between the vinyl tubular body, the steel tubular body, and the cast iron tubular body. Therefore, the operating tool 6 is mounted between the locking plate 53 and the locking piece 42 located closest to the cast iron pipe having the largest actual inner diameter, and is locked to the steel pipe having the smallest actual inner diameter. The operation tool 6 is mounted between the plate 53 and the locking piece 44 at the farthest position. In this way, the lever body 61 of the operation tool 6,
The shaft body 3 from the pipe body 4 is always operated by the same amount of 62.
The amount of pulling out the rubbers 1A and 1B should be appropriately increased or decreased, and the rubber bodies 1A and 1B should be kept in close contact with the inner circumference of the pipe body 74 with the appropriate expansion amount of the rubber bodies 1A and 1B with respect to the pipe body 74 having different inner diameters. You can

According to the plug device of the present embodiment, the nut body 51 is screwed to the position where it comes into contact with the pipe body 4 with the shaft body 3 pulled out by the operation tool 6 by a predetermined amount. Nut body 5 without using
1 can be rotated lightly. Further, since it is not necessary to use a tool, even if a plurality of stopper devices S are provided adjacent to each other, the nut body 51 can be quickly rotated without interfering with each other, which is excellent in workability. In this case, the operating tool 6 formed by the lever body is not affected by wear unlike the nut body 110 (see FIG. 5) in the conventional device, so that the operating amount can be made constant at all times. There is no problem such as excessive bulging and damage, or insufficient bulging to cause the plug device S to come off the pipe body, and the proper bulging amount of the rubber bodies 1A and 1B and the closing of the pipe body due to this always occur. You can get the power. Further, since the operating tool 6 can be removed from the stopper device S and shared with other stopper devices S, the cost can be reduced, and the stopper device S from which the operating tool 6 has been removed has a compact outer shape, and therefore is adjacent to the stopper device S. The airtight test can be efficiently performed by simultaneously mounting the stopper device S on a large number of pipes.

[0019]

As described above, according to the airtightness test wire device of the present invention, the workability is excellent, and an appropriate pipe closing force can always be obtained. In addition, by removing the operating tool from the stopper device and sharing it with other stopper devices, cost reduction can be realized, and since the external shape of the stopper device with the operating tool removed is compact, it can be used to plug a large number of adjacent pipes. The devices can be mounted at the same time to efficiently perform the airtight test.

[Brief description of drawings]

FIG. 1 is an overall vertical cross-sectional view of a stopper device showing an embodiment of the present invention.

FIG. 2 is a plan view of an operation tool.

FIG. 3 is a schematic cross-sectional view of a pipe line between manholes closed by a conventional stopper device.

FIG. 4 is an overall cross-sectional view of a conventional stopper device provided in the pipe body.

[Explanation of symbols]

1A, 1B ... Rubber body, 22, 23 ... End plate, 3 ... Shaft body, 4
... pipe body, 42, 43, 44 ... locking piece, 51 ... nut body, 53 ... locking plate, 6 ... operating tool, 61, 62 ... lever body, 612 ... locking pin, 622 ... base end, 7A, 7B ... pipe, 74 ... tubular body.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-193737 (JP, A) JP-A-8-168151 (JP, A) Actual opening Flat 7-10654 (JP, U) Actual opening Sho-59- 107534 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02G 9/00 H02G 1/08

Claims (7)

(57) [Claims] 1. A ring-shaped elastic body, a shaft body inserted through a central opening of the elastic body, and a first end integrally provided at a tip end of the shaft body and abutting on one side surface of the elastic body. A board,
A second end plate that is mounted around the shaft body so as to be relatively movable in the axial direction and abuts on the other side surface of the elastic body;
It is detachably installed between the end plate and the locking portion provided on the shaft body, and the distance between the installed ends is increased or decreased by operating the lever,
When the distance is increased, the first end plate or the second end plate is moved so as to reduce the relative distance between the two, and the operation tool for bulging the elastic body outward in the radial direction, and the operation tool for reducing the relative distance are provided. A pipe body having a positioning member for positioning the first end plate and the second end plate in this state, and inserting the shaft body therethrough.
And place one end of the pipe body in contact with the second end plate.
In addition to providing a locking portion on the outer periphery of the pipe body,
An operating tool is provided between the locking portion and the locking portion of the shaft body,
Plural locking parts of the pipe body are provided by changing the position in the axial direction.
A plug device for airtightness test of a pipe body characterized by the above . 2. The plug device for airtightness test of a pipe according to claim 1 , wherein a nut body screwed to the outer periphery of the shaft body is provided, and the nut body is brought into contact with the other end of the pipe body. A plug device for airtightness test of a tube body which is used as the positioning member. 3. The plug device for airtightness test of a pipe body according to claim 1 , wherein the operating tool is a first lever body, and a second lever body is rotatably connected to the first lever body. And a plug device for airtightness test of a pipe body, in which the distance between the erected ends is increased or decreased by rotating and opening / closing these levers. 4. A ring-shaped elastic body and a center of the elastic body
Provided integrally with the shaft inserted through the opening and the tip of the shaft.
A first end plate that is abutted against one side surface of the elastic body,
It is mounted around the shaft so that it can move in the axial direction.
A second end plate that abuts on the other side surface of the elastic body;
Detachable between the end plate and the locking part provided on the shaft
It is erected and the distance between the erection ends is increased or decreased by operating the lever.
When the distance is increased, the first end plate or the second end plate is moved relative to each other.
Move the elastic body in the radial direction
Before the operation tool that bulges outward and the relative distance becomes smaller
The position for positioning the first end plate and the second end plate in this state
An operating member and a first lever body,
A second lever body rotatably coupled to the first lever body
It consists of and
The distance between the erection ends can be increased or decreased.
Airtightness test plug device of the tube body. 5. A plug device for airtightness test of a pipe body according to claim 4.
In the installation, a pipe body for inserting the shaft body is provided,
When one end of the pipe body is brought into contact with the second end plate,
A locking portion is provided on the outer periphery of the pipe body,
A plug device for airtightness test of a pipe body, wherein an operation tool is provided between the shaft and the locking portion of the shaft body . 6. Airtightness test of the pipe according to claim 4 or 5.
In the stopper device, the locking portion of the pipe body is axially displaced.
A stopper device for airtightness tests of multiple tubes that are placed in different positions. 7. The method according to any one of claims 4 to 6.
In the plug device for airtightness test of the tube body of
Provide a nut body to be screwed, and
A pipe that is brought into contact with the other end of the pipe body to serve as the positioning member
Plug device for air tightness test of body.