JP2000329298A - Cover plate member for stripping pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take out fluid without replacing a cover plate member during purging of liquid, sampling of fluid, or measurement of the pressure of fluid, to prevent leakage of fluid, and to improve workability without interference to a work. SOLUTION: A cover plate member of a stripping pipe blocks discharge fluid in a pipe through contact with the end flange 7a of a stripping pipe 7 to effect stripping of fluid in a pipe to the ground side. A communication hole 10 to effect intercommunication between the internal part and the external part of the stripping pipe 7 is situated in a state to be mounted on the flange 7a. A female screw part 5a is formed in the communication hole 10, a closing plug tool 13 having a male screw part 13a threadedly engaged with the female screw part 5a is threadedly engaged with and coupled to the female screw part 5a from the internal side of the stripping pipe 7 with a sealant 14 located therebetween. A rotation operation part rotationally operated from an external part through the communication hole 10 is situated at the closing plug tool 13. Along with screwing operation of the closing plug tool 13 to the external side of the stripping pipe 7 through the rotation operation part, discharge of the fluid is blocked. Along with screwing operation to the internal side of the stripping pipe 7, the fluid is discharged to the external part of the stripping pipe 7. A so formed fluid discharge part R is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover plate member of a diffusion tube for preventing the discharge of the fluid in the pipe by applying the fluid in the pipe to an end flange of the diffusion pipe which can be radiated to the ground side.

[0002]

2. Description of the Related Art Conventionally, as a cover plate member of this kind of diffusion tube, as shown in FIG. 8, one plate body 25 having a flange formed thereon, and a bolt 6 at a flange end portion 7a of the diffusion tube 7 are provided. Through which the discharge of the fluid in the pipe is prevented.

[0003]

The diffusion tube 7 is used for sampling the fluid or measuring the pressure of the fluid when the purging of the fluid becomes necessary due to construction work or the like. According to the cover plate member 25, when the purge amount of the fluid is large, the bolt 6 is removed, the cover plate member 25 is removed from the flange end 7a of the diffuser tube 7, and the fluid in the diffuser tube 7 is released. Fig. 8 (a) when the amount is small, or when sampling the fluid or measuring the pressure of the fluid.
As shown in (b), after removing the lid plate member 25, a lid plate member 26 having a connection portion to which the hose 15 for fluid derivation can be connected is connected to the end flange 7 a of the diffusion tube 7 by a bolt 6. After the replacement, it is necessary to connect the fluid outlet hose 15, which is troublesome and has poor workability. Further, as shown in FIGS. 9A and 9B, the hose connection portion 27 for the fluid deriving hose 15 is previously provided.
A in a state in which the hose connection portion 2
It is conceivable to attach the cover plate member 27 having the cap 7A closed by the cap 28 to the diffusion tube 7. However, when the opening / closing valve of the fluid pipe is operated, or when various operations such as the purging operation of the fluid are performed, the diffusion is performed. There is also a case where the work is carried out by placing a foot on the cover plate member 27 of the pipe 7, and at this time, the hose connection portion 27A protruding above the cover plate member 27 becomes an obstacle, and the user stumbles and is injured. There is a risk of doing. In addition to the above, the cover plate member 27 is easily obstructed even when the wrench is rotated when the cover plate member 27 is fixed to the diffuser tube 7 with the bolts 6.
It becomes difficult to perform the tightening operation. Further, since the cap 28 is fastened to the hose connection portion 27A from above, the pressure for pushing up the fluid from below acts in the direction to push up the cap 28, and there is a risk that the fluid may easily leak.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and to remove fluid without having to replace a cover plate member when purging fluid, sampling fluid, or measuring pressure of fluid. It is an object of the present invention to provide a cover plate member of a diffusion tube, which can prevent leakage of a fluid and can easily improve workability without hindering work.

[0005]

As shown in FIGS. 1 to 4, the characteristic structure of the invention according to the first aspect of the present invention is to apply a fluid in a pipe to an end flange 7a of a diffusion pipe 7 which can radiate to the ground side, and A cover plate member for a diffusion tube for preventing discharge of a fluid, wherein a communication hole for communicating the inside of the diffusion tube with the outside is provided in a state of being attached to the flange; A stopper 13 having a screw portion 5a and having a male screw portion 13a which can be screwed to the female screw portion 5a is inserted into the female screw portion from the inside of the diffusion tube 7 with a sealing member 14 interposed therebetween. The stopper 13 is provided with a turning operation portion K which is screwed and connected to the portion 5 a and can be turned from the outside through the communication hole 10, and the turning operation portion K is used to connect the stopper 13 to the diffusion tube 7. As the screwing operation is performed outward, the release of the fluid is prevented, Located on the inner side of the trenchless 7 the fluid with To screwed operation where there is provided a fluid discharge section R which allows released to the outside of the dissipating tubes 7.

[0006] As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Operation and Effect] According to the first aspect of the present invention,
In the state attached to the flange, a communication hole for communication between the inside and the outside of the diffusion tube was provided, a female screw portion was formed in the communication hole, and a male screw portion capable of being screwed to the female screw portion was provided. The stopper is screwed and connected to the female screw portion with a sealing material interposed from the inside of the diffusion tube, and the stopper is provided with a turning operation section that can be turned from the outside through the communication hole. With the operation of screwing the stopper to the outside of the diffusion tube by the rotating operation part, the discharge of the fluid is prevented, and with the screw operation to the inside of the diffusion tube, Since the fluid discharge portion that allows the fluid to be discharged to the outside of the diffusion tube is provided, the stopper can be prevented from deteriorating, the fluid can be easily taken out when necessary, and the workability can be improved. That is, for example, as shown in FIG. 7, the stopper 13 is fixed to the insertion hole 10 provided in the cover plate member 5 from above so as to prevent the fluid in the diffusion tube 7 from being released. In addition to the fact that water, mud and the like easily adhere to the stopper 13 and that the stopper 13 and the sealing material 14 are constantly in contact with air, not only the threads of the stopper 13 are easily corroded, but also The material 14 also tends to be deteriorated by oxidation.
In addition, since the stopper 13 is tightened from above, the pressure for pushing up the fluid from below acts in the direction of pushing up the stopper 13, and there is a risk that the fluid tends to leak, but in this case, the stopper is closed. Since it is fixed to a state where the discharge of the fluid in the diffusion tube is prevented by tightening from the inner side of the diffusion tube with respect to the insertion hole provided in the plate member, there is no one protruding above the lid plate member, It does not interfere with the operation of the on-off valve of the fluid pipe, the various operations such as the purging operation of the fluid, or the turning operation of the wrench when the cover plate member is fixed to the diffusion tube by bolting. In addition, since there is a stopper and a seal in the fluid, it does not come into contact with air, and the upward pressure of the fluid from below acts in a direction to push up the stopper and tighten the stopper. Furthermore, the fluid can be prevented from being discharged or discharged to the outside by the screwing operation of the stopper. As a result, it is possible to prevent corrosion and deterioration of the stopper and the sealing material due to oxidation. It can be taken out and workability can be improved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

FIG. 1 shows a valve device according to the present invention, in which a ball valve main body 1 and a gas pipe 2 for supplying city gas connected to the ball valve main body 1 are buried underground, and a valve of the ball valve main body 1 is provided. The rod 3 is operated from the ground side via an operation shaft 4 which can be rotated freely, and two gas diffusion pipes 7 connected to the gas pipe 2 which is capable of dispersing gas in the pipe to the ground side are provided. The part 8 and the respective diffusion tubes 7 are provided facing a common work hole 9 opened to the ground side.

The ball valve body 1 is configured to rotate a valve body by rotating a valve stem 3 to adjust the opening thereof. Part 11
Are formed integrally with the valve box 12.

The working hole 9 is provided in the concrete wall 18.
Steel cover plate 1 whose opening is openable and closable
9 is provided to protect the operation unit 8 and the end of each diffusion tube 7.

Each of the diffuser tubes 7 is connected to the left and right connecting tube portions 11, and the upper portions thereof are bent toward the operation shaft 4 so that the ends of the respective diffuser tubes 7 are connected to the operation portion 8. It faces the inside of the working hole 9 in a state of being close to the left and right sides.

As shown in FIG. 3, an end flange 7a of the diffuser tube 7 is attached to the end flange 7a of the diffuser tube 7 to prevent the city gas in the gas tube 2 from being released. The member 5 is attached and fixed by bolts 6. The cover plate member 5 is provided with a communication hole 10 formed with a female screw portion 5a that allows the radiation pipe 7 to communicate with the outside while being attached to the end flange 7a. A stopper 13 having a mateable male thread 13a is screwed and connected to the female thread 5a from the inside of the diffusion tube 7 with a sealing member 14 interposed therebetween.

As shown in FIG. 2, the stopper 13 is provided at a plurality of locations around the male screw portion 13a.
), A cut groove 13 along the axial direction X of the stopper 13.
b (an example of a fluid discharge portion R), and when the stopper 13 is screwed to the female screw portion 5a from the inner side of the diffusion tube 7, At the center of the stopper 13 facing the outside, a turning operation part K capable of rotating the stopper 13 is provided.

Next, a description will be given of a procedure for connecting the gas deriving hose 15 to discharge gas when purging, sampling, or measuring the pressure of the city gas by the cover plate member 5 of the diffusion tube 7 in the present invention. I do. As shown in FIG.
First, water is introduced into the communication hole 10 of the cover plate member 5 with respect to the end of the diffusion tube 7a, which is prevented from discharging the city gas, by the stopper 13 screwed to the communication hole 10 of the cover plate member 5. ,
The cap 16 covering the mud and the like is removed (see FIG. 4A), and a hexagon wrench 17 (rotation) is inserted into a hexagon hole 13c (an example of the rotation operation part K) provided in the stopper 13. An example of an operation member) is inserted, and the stopper 13 is screwed to move inward of the diffusion tube 7. (FIG. 4
(Refer to (b)) When the stopper 13 advances to the inside of the diffusion tube 7 by the screwing operation of the stopper 13, the sealing material 14
Is separated from the inner surface of the lid plate member 5, and the cut groove 13b allows the inside of the diffusion tube 7 to communicate with the outside. The male screw portion 15a at the connection portion 15A of the city gas deriving hose 15
To the female screw portion 5a formed in the communication hole 10 of the cover plate member 5 from the outside, and the city gas is led out. (Refer to Fig. 4 (c))

[Another Embodiment] Another embodiment will be described below. <1> The fluid discharging portion R is the stopper 1 described in the above embodiment.
For example, as shown in FIG. 5, the stopper 1 is provided at a plurality of locations around the female screw portion 5 a formed in the communication hole 10 of the cover plate member 5, as shown in FIG. 5.
3 may be formed with a cut groove 13b along the axial direction X. In this case, the processing becomes easier than performing the cutting groove 13b on a small component such as the stopper 13. <2> The rotating operation unit K is the hexagonal 1 described in the previous embodiment.
The stopper 13 is not limited to the one for rotating the stopper 13 using the hexagon wrench 17 in the hole 3c. For example, as shown in FIG. A plurality of pin holes 13e are provided at the end 13d of the stopper which faces the outside when screwed together from the outside, and a position corresponding to each of the plurality of pin holes 13e is provided at the end of the connecting portion 15A of the city gas outlet hose 15. And a pin 15a formed at the end of the connecting portion 15A of the city gas deriving hose 15 is inserted and connected to a pin hole 13e provided in the stopper 13. Female thread 5
b, the stopper 13 is moved inward of the diffuser tube 7 so that the city gas in the diffuser tube 7 is released from the discharge hole 13f provided in the stopper 13 for discharging city gas.
Gas is led out of (an example of the fluid discharge part R) via the gas lead-out hose 15. In this case, the gas can be led out only by the connection operation of the gas lead-out hose 15, and the gas does not leak to the outside during the connection. <3> The fluid discharge part R is not limited to the cut groove 13b or the discharge hole 13f described in the above embodiment. For example, the female screw part 5a of the cover plate member 5 and the stopper 13 may be used.
When the male screw portion 13a is screwed and connected, a gap may be formed between the respective screw portions. In this case, the city gas is supplied from the gap formed in the screw portion to the outside with the screwing operation of the stopper 13 toward the inside of the diffusion tube 7 without forming the kerf 13b and the discharge hole 13f. Can be released. <4> The number of the fluid discharge portions R is 4 as described in the previous embodiment.
The shape of the fluid discharge portion R is not limited to the cut groove 13b and the discharge hole 13f described in the above embodiment. In other words, the number and the shape of the fluid discharge portions R are such that the city gas is externalized as the stopper 13 screwed to the female screw portion 5a of the cover plate member 5 is screwed inward of the diffusion tube 7. The number and shape are arbitrary as long as they can be released. <5> The shape of the rotation operation part K and the shape of the rotation operation member are not limited to the hexagonal shape or the pin connection described in the above embodiment. If so, its shape is arbitrary.

[Brief description of the drawings]

FIG. 1 is a side view of a valve device and a diffusion tube according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a stopper according to the embodiment of the present invention.

FIG. 3 is a longitudinal sectional side view showing a cover plate member according to an embodiment of the present invention.

FIG. 4 is an explanatory view of the operation of the stopper according to the present invention.

FIG. 5 is a partially enlarged longitudinal sectional side view illustrating an attached state of a stopper of another embodiment.

FIG. 6 is an operation explanatory view showing a relationship between a stopper and a gas deriving hose of another embodiment.

FIG. 7 is a partially enlarged longitudinal sectional side view for explaining an attached state of a stopper in a comparative example.

FIG. 8 is a partially enlarged longitudinal sectional side view showing a cover plate member showing a conventional example.

FIG. 9 is a partially enlarged side view showing a cover plate member showing a comparative example in a conventional example.

[Explanation of symbols]

 Reference Signs List 5 cover plate member 5a female screw portion 7 diffusion tube 7a end flange 10 communication hole 13 stopper 13a male screw portion 14 sealing material K rotation operation portion R fluid discharge portion

Claims (1)

[Claims] 1. A cover plate member of a diffusion tube for applying a fluid in the tube to an end flange of the diffusion tube capable of dissipating the ground fluid to the ground side to prevent the discharge of the fluid in the tube, wherein the cover plate member is attached to the flange. A communication hole through which the inside of the diffusion tube communicates with the outside is provided, a female screw portion is formed in the communication hole, and a stopper provided with a male screw portion capable of being screwed to the female screw portion is provided with a stopper for the diffusion tube. The stopper is provided with a turning operation portion which is screwed to the female screw portion with a sealing material interposed from the inner side, and which is rotatable from the outside through the communication hole. As the tool is screwed outward of the diffusion tube, the release of the fluid is prevented, and as the screw is screwed inward of the diffusion tube, the fluid is discharged to the outside of the diffusion tube. A cover plate member of a diffusion tube provided with a fluid discharge portion that enables discharge.