JPH08121641A - Underground buried pipe shut-off valve opening/closing device - Google Patents

Abstract

PURPOSE: To enable one worker to easily open/close an underground buried pipe shut-off valve buried underground even in the case of an obstruction existing near. CONSTITUTION: An expandable driving shaft 10 is fitted to the valve opening/ closing stem 2a of a valve 2, and this driving shaft 10 is rotated using a ratchet wrench 19 and a booster 13 so as to open/close a service pipe shut-off valve 2 in a pit 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground buried pipe shutoff valve opening / closing device which allows a worker to easily open and close a gas valve, a water valve, etc. buried in the ground.

[0002]

2. Description of the Related Art Gas pipes and water pipes buried underground are equipped with shut-off valves for the purpose of shutting them off in an emergency and using them for piping work. FIG. 6 is an example of a lead-in pipe cutoff valve attached to a gas conduit, where 1 is a lead-in pipe, 2 is a lead-in pipe cutoff valve, 3 is a valve pit, 4
Is a resin box, 5 is a road surface indicator, 6 is a lid,
When opening / closing the lead-in tube cutoff valve 2, the lid 6 is removed, and one valve opening / closing rod 8 is inserted from here to insert the tip 8
a is fitted to the opening / closing head 2a of the lead-in pipe cutoff valve 2, and the handle 9 of the opening / closing rod 8 is rotated by two workers on the ground.

[0003]

Therefore, there are the following drawbacks. a. Since buildings are often built on the entire site due to the reduction of building coverage and effective use of land, the valve pit 3 is often installed close to nearby buildings. Therefore, when opening and closing the intake pipe shutoff valve 2,
The handle 9 may hit the surrounding wall surface or the like, which may make it very difficult to open / close the lead-in pipe cutoff valve 2. b. One open / close bar 8 is long, heavy, and has a handle 9
Since it is heavy, the workability at the time of installation and removal is poor, and it is also inconvenient to carry. c. The lead-in pipe cutoff valve 2 may become hard over time, and it may be difficult or difficult for the two workers to open and close it. An object of the present invention is to eliminate the above-mentioned drawbacks a to c in opening and closing a lead-in pipe cutoff valve buried in the ground.

[0004]

The structure of the underground buried pipe shutoff valve opening / closing device according to the present invention is as follows. A fitting port for fitting the opening / closing shaft of the underground buried pipe cutoff valve is formed at the lower end, the middle is made expandable, and the upper end is formed with a connecting portion for connecting the output shaft of the booster. A drive shaft, a plate formed on each of the lower surfaces of both ends to engage with a claw hole formed on the inner edge of the road surface indicator, and a plate formed to have a length across the inner edge of the road surface indicator; The underground embedment consisting of a booster mounted on a plate with the output shaft protruding from the lower central surface of the plate, and a ratchet wrench for driving the booster by connecting the lower end of the drive shaft to the input shaft of the booster. Tube shut-off valve opening / closing device.

[0005]

[Operation] When opening and closing the underground buried pipe shutoff valve, remove the pit lid, connect the output shaft of the booster attached to the plate to the upper end of the drive shaft, and lower the drive shaft into the pit while holding the plate. Then, the lower end of the drive shaft is fitted to the underground buried pipe shutoff valve opening / closing shaft, and the engaging piece of the plate to which the booster is attached fixes the pit lid formed on the inner edge of the road surface indicator. Engage the holes to secure the plate. In this state, when the drive shaft of the ratchet wrench is connected to the input shaft of the booster and the wrench handle is rotated by a certain angle, the increased rotation is transmitted from the output shaft to the valve opening / closing shaft via the drive shaft, and the underground pipe is buried. The shutoff valve is opened and closed. When carrying, etc., it can be separated into three parts, a drive shaft, a booster, and a ratchet wrench.

[0006]

1 and 2 show an underground buried pipe shutoff valve opening / closing device embodying the present invention. Reference numeral 10 is a drive shaft. The drive shaft 10 has a fitting opening 11 formed at a lower end for fitting with a valve opening / closing shaft, and an upper shaft 10a is telescopically inserted into a lower shaft 10b in the middle. The upper end is formed with a connecting portion 12 into which the output shaft on the booster side is fitted. Reference numeral 13 is a power booster. The power booster 13 has engaging pieces 15 and 16 formed on the lower surfaces of both ends, and is attached to a plate 14 formed to have a length across the inner edges of the road surface indicator. . Reference numeral 17 is an output shaft of the booster 13, and 18 is an input shaft. 19 is a ratchet wrench, and the drive shaft 2 of the ratchet wrench 19
0 can be fitted onto the input shaft 18 of the booster 13 from above. Reference numeral 21 is a handle of the ratchet wrench 19, and the handle 21 is detachable from the handle mounting portion 22. Reference numeral 23 is a bolt for fixing the output shaft 17 of the booster 13 to the connecting portion 12 of the drive shaft 10 so as not to come off, and 24 is a nut.

An example of opening and closing the lead-in pipe cutoff valve using the above-mentioned underground buried pipe cutoff valve opening / closing device will be described below with reference to FIGS. First, the output shaft 17 of the booster 13 fitted to the connecting portion 12 of the drive shaft 10 and fixed with the bolt 23 and the nut 24 is lowered into the pit (FIG. 3), and the fitting port 11 of the drive shaft 10 is pitted. In the claw hole 5b for fixing the lid of the pit formed on the inner edge 5a of the road surface indicator 5 while fitting the valve opening / closing shaft 2a of the intake pipe shutoff valve 2 of FIG. And fix it (Figs. 3 and 4). next,
The drive shaft 20 of the ratchet wrench 19 is fitted onto the input shaft 18 of the booster 13 from above, and the handle 21 is attached to the ratchet wrench 19, and the handle 21 is reciprocated within a certain angle range as shown in FIG. Then, this movement becomes a rotational movement increased by the booster 13 and is transmitted from the drive shaft 10 to the valve opening / closing shaft 2a of the lead-in pipe cutoff valve 2 in the pit 3. The road surface indicator 5 receives the reaction force at the time of the opening / closing action via the plate 14. In FIG.
4 is a resin box.

[0008]

Since the present invention is constituted as described above,
The following effects can be achieved. a. Since the underground buried pipe shutoff valve can be opened and closed by the ratchet wrench, the turning radius of 360 ° is not required unlike the conventional case. Therefore, it is possible to open and close the underground pipe shutoff valve even if there is a wall surface nearby. b. Since the booster is used, one worker can open and close the underground pipe shutoff valve. c. The valve opening / closing device has a drive shaft that can be expanded and contracted, and the drive shaft, booster, and ratchet wrench can be separated, making it convenient to put in a case or carry or store. is there.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an underground buried pipe shutoff valve opening / closing device according to the present invention.

FIG. 2 is a sectional view of an underground buried pipe shutoff valve opening / closing device according to the present invention.

FIG. 3 is an explanatory diagram of a situation in which a drive shaft is being lowered in a pit.

FIG. 4 is an explanatory view of a situation in which the plate is fixed to a road surface indicator.

FIG. 5 is an explanatory view of a situation in which a lead-in pipe cutoff valve is opened and closed.

FIG. 6 is an explanatory view of a state in which a conventional lead-in pipe cutoff valve is opened and closed.

[Explanation of symbols]

 10 Drive Shaft 13 Booster 14 Plate 19 Ratchet Wrench

Claims (1)

[Claims] 1. A connecting portion for forming a fitting port for fitting with an opening / closing shaft of an underground buried pipe shutoff valve at a lower end, and for forming an intermediate portion to be expandable / contractible, and for connecting an output shaft of a booster at an upper end. The drive shaft is formed by forming an engaging piece that engages with a claw hole formed on the inner edge of the road surface indicator on the lower surfaces of both ends, and is formed to have a length that straddles the inner edge of the road surface indicator. A plate, a booster mounted on the plate by projecting an output shaft on a lower central surface of the plate, and a ratchet wrench for driving the booster by connecting a lower end of a drive shaft to an input shaft of the booster, Underground pipe shutoff valve opening and closing device consisting of.