JPH03194272A - Method and device for repairing gas cock - Google Patents

Abstract

PURPOSE:To prevent a burner from its unexpected extinguishment by supplying fuel gas into a work case to purge air therein, prior to extraction of a closing piece into the work case, and closing a shutoff tool to remove the case therefrom after the closing piece is extracted. CONSTITUTION:Prior to extraction of a closing piece 20 into a work case D, fuel gas is supplied into the case D to purge air therein, and after the closing piece 20 is extracted, its cleaning and lubricant-applying work is executed outside the case by taking it out from a shutoff tool C by closing it. Prior to fit-mounting of the closing piece 2c to a cock main unit 4, the case D, which houses the closing piece 20, is air-tightly connected to the shutoff tool C in a condition that the closing piece 20 is mounted to a closing piece insertion/ removal tool E, and fuel gas is supplied into the case D to purge air in the case D thereafter to open-operated the shutoff tool C. Consequently, trouble, such as unexpected extinguishment of a burner by an inflow of air from the work case D to a fuel gas pipe A, can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a gas cock installed in a fuel gas pipe for city gas, for example, in which a new lubricant such as grease is applied to the circumferential surface of the closure. , relating to technology for suppressing gas leaks.

More specifically, a closed working case is airtightly attached to the cock body provided in the fuel gas piping, and a closure insertion/removal tool, which is passed through the working case in an airtight manner, is connected to the closure. , pulling out the closure insertion/removal tool by an operation from the outside of the work case, extracting the closure into the inside of the work case, cleaning the circumferential surface of the closure, and applying lubricant to the circumference. and fitting the closure in the work case, which is airtightly attached to the cock body, into the cock body by pushing the closure insertion/removal tool from outside the work case; While removing the work case from the cock body,
The present invention relates to a gas cock repair method for removing the closure insertion/removal tool from the closure, and a repair device used therein.

[Conventional technology]

Conventionally, as shown in Japanese Utility Model Application No. 64-3179,
Connect the work case to the cock body, pull out the closure into the work case with air still in the work case, and clean the work case attached to the work case with the closure still housed inside the work case. At the same time as operating the tool or lubricant applicator from the outside, operate the closure insertion/removal tool from the outside to clean and apply lubricant to the closure, and then fit the closure coated with new lubricant into the cock body. I was wearing it.

[Problem to be solved by the invention]

However, the work of cleaning and applying lubricant to the closure inside the work case is particularly difficult for larger gas cocks, and there is room for improvement in workability.

Then, there is a problem in that the air in the work case flows into the fuel gas piping, causing a gas leakage accident due to unexpected extinguishing of the burner, and problems with IF nuts that adversely affect products in industrial furnaces.

An object of the present invention is to easily apply new lubricant to the gas cock closer, even if the gas cock is large, and to do so while sufficiently suppressing air inflow into the fuel gas piping. The purpose is to prevent gas leakage accidents caused by unexpected extinguishing of burners and adverse effects on products in industrial furnaces.

[Means to solve the problem]

A feature of the present invention is that a shutoff device is interposed between the work case and the cock body to switch the two into a communicating state and a non-communicating state, and the closure is not removed into the work case. First, fuel gas is supplied into the working case to purge the air inside the working case, and after the closing member is removed, the shutoff device is closed and the working case is removed from the shutoff device. removing the closure, taking out the closure from the work case, cleaning and applying lubricant to the closure outside of the work case, and prior to fitting the closure to the cock body; inserting and removing the closure; With the closing member attached to the tool, the working case containing the closing member is airtightly connected to the shutoff tool, fuel gas is supplied into the working case, and the working case is closed. The purpose is to purge the air, and then open and operate the shutoff device, and its functions and effects are as follows.

[For production]

Before removing the closure, the air inside the work case is purged by supplying fuel gas into the work case, and then the closure is extracted into the work case, so there is no need to connect the fuel gas piping from the work case to the work case. This eliminates the trouble of accidentally extinguishing the burner due to air flowing in.

Then, the work case is removed from the cock body, and the closing member is cleaned and lubricated outside the work case. Cleaning and lubricating the closure can be performed more easily and quickly than by externally operating the applicator and closure insertion/removal tool, and is particularly effective in improving work efficiency on large gas cocks. It is.

In addition, before fitting the closure to the cock body, the work case is airtightly connected to the interrupter, and with the interrupter closed,
The air inside the work case is purged by supplying fuel gas into the work case, and then the shutoff is opened and the closure is fitted into the cock body, so air flows from the work case into the fuel gas piping. This eliminates the trouble of the burner unexpectedly extinguishing.

Therefore, both in removing and fitting the closure, it is possible to reliably prevent troubles such as gas leak accidents caused by unexpected extinguishing of the burner and adverse effects on products in industrial furnaces.

〔Effect of the invention〕

As a result, it is not only possible to apply lubricant to the closing member of the gas cock in use while sufficiently suppressing gas leakage, but it is also possible to apply lubricant to the closing member of the gas cock while it is being used. We were able to establish a much better method for repairing gas cocks, which eliminates troubles caused by inflow and allows for good repair on the gas supply side.

Moreover, as described in claim 2, it has become possible to provide a gas cock repair device convenient for carrying out the excellent gas cock repair method of the present invention.

〔Example〕

Next, examples will be shown.

First, the repair device will be explained with reference to FIGS. 1 to 3.

The repair device is a gas cock (
It consists of a shutoff device (C) to be attached to E), a work case (D) that is detachable from the shutoff device (C), and a closure insertion/removal tool (E) attached to the work case (D). .

In the interrupter (C), tighten the pair of hooks (la) and (lb) that are to be secured to the pipe (A), and tighten the fixing bolt (2a).
, ), (2b) is connected to the main body (3), and an assia I link (5) is attached that is fitted inside the main body (3) and externally fitted to the cock main body (4), and is connected to the main body (3). A seal ring (6) that airtightly seals between the adjustment links (5) and between the adjustment links (5) and the cock body (4).
), (7), lock the hooks (la) and (lb) to the pipe (A), and tighten the bolts (2a) and (2b) to open the closure entry/exit opening of the main body (3). While communicating with the closing insertion/removal port of the cock body (4), insert the main body (3).
) can be hermetically connected to the cock body (4). Further, a slide shutter (8) for opening and closing the closing member entrance/exit opening is provided on the main body (3) so as to be openable/closeable by an operating portion (9).

Attach the work case (D) to a pair of bolts (10a), (1
0b), and a seal ring (11) is provided to airtightly seal between the work case (D) and the shutoff tool (C), and a transparent plate is attached to the work case (D). A viewing window (12) is formed. In addition, the purge gas supply path (I4) with a cock (13) and the gas exhaust path (16) with a cock (15) are connected to the work case (D), and a transport gas recovery container such as a bag ( I7) is connected to the gas discharge path (16), the transport gas in the work case (D) is used for transport gas recovery by supplying air from the purge gas supply path (14) using the pump or port. The fuel gas is sent to a container (17) and sealed tightly to prevent the transport gas from dissipating into the atmosphere, and the fuel gas is supplied from the purge gas supply path (14) by the fuel gas container (31) such as a cylinder or bag. The air in the working case (D) can be discharged to the outside from the gas exhaust path (16) by supplying air.

To form the closure insertion/removal tool (E), a shaft (18) is provided that slides through the work case (D) and is connected to the operating shaft of the closure (20) with a screw (19). A connecting part (21) is provided at the inner end of the shaft (18), and a guide member (22) for positioning the connecting part (21) using the work case (D) as a guide is provided at the connecting part (2I). A rotation prevention protrusion (2) is attached and formed on the periphery of the guide member (22).
2a) in the groove (23) of the work case (D),
Attach the nut (25) with the handle (24) to the shirt) (1
8), and a washer (26) is provided between the working case (D) and the nut (25). In other words,
When the shaft (18) is pulled out of the work case (D) by rotating the Narrow 1-(25), the closure (20) connected to the shaft (18) is moved from the cock body (4) to the work case (D). ) It is constructed so that it can be extracted inside. In addition, the bush (27) and shaft (
Seal ring (28) that airtightly seals the gap between
) is provided.

Next, a method for repairing the gas cock (E) will be explained.

(1) Remove the gland for preventing the closure from falling out from the cock body (4), and if necessary, clean the end surface of the cock body (4) that contacts the seal ring (6) with a wire brush or the like.

(2) As shown in Fig. 4, connect the connecting part (21) of the shaft (18) removed from the work case (D) to the
) to the operating shaft of the cock body (4), and with the slide shutter (8) open, connect the shutoff device (C) to the cock body (4).
) to hook (la), (lb) and bolt (2a),
Fix it airtight with (2b).

(3) As shown in Figure 1, the shaft (18) is passed through the work case (D), and the guide member 1 (22) is fitted inside the work case (D). Bolt (10a) the case (D) to the interrupter (C).

(]Ob) to connect airtightly.

(4) With the transport gas recovery container (17) removed, open the cocks (1, 3) and (1, 5) of the purge gas supply path (14) and gas discharge path (16), and open the fuel gas container. (31
) to supply fuel gas into the working case (D) and release the air inside the working case (D) to the outside, then close both cocks (13) and (15) and close the working case ( D
) in a sealed state.

(5) Attach the washer (26) and nut (25) to the shirt I-(18), pull out the shaft (18) by operating the handle (24), and work the closure (20) as shown in Figure 2. Remove it into the case (D).

(6) Fully close the slide shutter (8) to prevent the transport gas from flowing into the work case (D) from the cock body (4), and then, with the fuel gas container (31) removed, Purge gas supply path (14) and gas discharge path (]6
) cocks (13) and (15) are opened, air is supplied from the purge gas supply path (14) into the work case (D), and the transport gas in the work case (D) is transferred to the transport gas. The recovery container (I7) is sealed and the cock (15) of the gas discharge path (16) is closed.

(7) Remove the work case (D) from the shutoff (C), remove the nut (25) and washer (26), take out the closure (20) from the work case (D), and remove the closure (20) from the work case (D). 20
) and apply a lubricant such as grease, oil, or sealant to the peripheral surface of the work case (D).

(8) Again, as shown in Figure 2, with the closure (20) attached to the closure insertion/removal tool (E), insert the work case (D) containing the closure (20) into the shutoff tool. (C) in an airtight manner. Note that the nut (25) and washer (26) may remain removed.

(9) With the transportation gas recovery container (17) removed, open the cocks (13) and (15) of the purge gas supply path (14) and gas discharge path (16), and remove the gas from the fuel gas container (31). Supply fuel gas into the working case (D), release the air inside the working case (D) to the outside, and open both cocks (13).
, close (15).

4 (10) Fully open the slide shutter (8) and close it by rotating the shirt h (1, 8) as shown in Figure 1.
With the shaft (18) adjusted to the open position,
) to fit the closure (20) into the cock body (4).

(11) With the fuel gas container (31) removed, purge gas supply channel (14) and gas discharge channel (16) cocks (
13) and (15), and open the purge gas supply path (14).
) into the working case (D), the transport gas in the working case (D>) is transferred to the transport gas recovery container (17).
) and close the cock (15) of the gas discharge path (16).

(121 Remove the work case (D) from the interrupter (C) and pull it out from the shaft (I8).

(13) Collect the shutoff (C) and shaft (18), and attach the redland packing and gland to the cock body (4).

[Another example]

Next, another embodiment will be described.

The specific means for attaching the shutoff device (C) to the cock body (4) can be changed as appropriate. For example, by locking a hook on the cock body (4), or by using the sealing hook provided on the cock body (4), the shutoff device (C) is locked and fixed to the cock body (4). It may be possible to do so.

The specific structure of the shutoff device (C) and the connection structure to the cock body (4) can be appropriately selected. For example, Figure 5 (a), (
As shown in FIG. 0), instead of the slide shutter (8), a rotary valve body (29) may be provided that can be externally operated using the operating section (30).

The specific structure of the work case (D) and the connection structure to the interrupter (C) can be appropriately selected.

The specific structure of the closure insertion/removal tool (E) can be changed appropriately, for example, it may be provided with a drive means for connecting and disconnecting from the closure (20) or for inserting/removing the closure (20). good.

To purge the transport gas, purge gas supply path (14)
The means for supplying the purge gas into the working case (D) can be changed as appropriate, such as by connecting a cylinder for supplying a purge gas such as N2 to the work case (D). In the transportation gas purge after the cock is installed, liquid may be injected from the purge gas supply path (4).

The specific structure of the transport gas recovery container (17) can be changed as appropriate. For example, a piston sucks the transport gas in the work case (D), and the purge gas supply path (14) is connected to the work case (D). It may be configured to draw outside air into the interior.

The first transport gas purge and the second transport gas purge may be performed in the same transport gas recovery container (17), or may be performed in separate transport gas recovery containers (17).

When the transport gas is purged and collected in the container (17), when the work case (D) is removed, the transport gas dissipates from inside the case (D), which may cause the operator to misidentify a gas leak or cause the gas to leak. It can reliably solve the problem of gas supply automatically shutting off unexpectedly due to a leak detector, allowing gas cocks to be repaired without gas leaks, in a highly efficient manner with no wasted work, and with unexpected gas shutoffs. The purge of the transport gas may be omitted if there is no such problem.

To purge air, it is desirable to supply fuel gas of the same quality as the transport gas from the purge gas supply path (14) from the viewpoint of combustion stability in the burner, but the type of fuel gas can be selected as appropriate. In addition, the means for supplying fuel gas into the work case (D) can be changed appropriately. For example, the means to supply the fuel gas into the work case (D) can be changed, for example, by filling the fuel gas container (31) with the transport gas on site, or by filling the fuel gas pipe (A) with the transport gas on site.
The purge gas supply path (14) may be connected to the hose end of the purge gas supply path (14) with a hose, or the gas may be supplied from the cock body (4) by slightly opening the closure (20) or the shutoff device (C).

The type of gas transported by the fuel gas pipe (A) does not matter, and the model of the gas cock (E) to be repaired also does not matter. The installation can be carried out with the insertion hole of the child removal prevention bolt closed with a cap.

Incidentally, although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of the repair device, FIG. 2 is a view taken along the ■-■ arrow in FIG. 1, and FIG. 3 is a view taken along the ■-■ arrow in FIG. Figure 4 is an explanatory diagram of the construction state, Figure 5 m,
(o) is a sectional view of a main part of another embodiment. (A)...Fuel gas piping, (C)...
Shutoff device, (D)... Work case, (E)...
... Closure insertion/removal tool, (4) ... Cock body,
(14)...Purge gas supply path, (16)...
...Gas exhaust path, (20) ...closed.

Claims (1)

[Claims] 1. Attaching a closed work case (D) to the cock body (4) provided in the fuel gas pipe (A) in an airtight manner,
A closure insertion/removal tool (E) passed through the work case (D) in an airtight manner is connected to the closure (20), and the closure is operated from outside the work case (D). Pull out the insertion/removal tool (E), pull out the closure (20) into the inside of the work case (D), and after cleaning the circumferential surface of the closure (20), apply lubricant to the circumference. Then, the closing member (20) inside the work case (D), which is airtightly attached to the cock body (4), is inserted into the closing member insertion/removal tool (
The working case (D) of E) is fitted into the cock main body (4) by a pushing operation from the outside, and the working case (D) is removed from the cock main body (4), and the closing member is inserted and removed. Close the tool (E) with the closure (20)
A method of repairing a gas cock removed from a gas cock, the method comprising: installing a shutoff device () between the work case (D) and the cock body (4) to switch the two into a communicating state and a non-communicating state;
C) is installed, and before the closure (20) is removed, fuel gas is supplied into the working case (D) to purge the air in the working case (D). After the closure (20) is removed, the shutoff tool (C) is closed, the work case (D) is removed from the shutoff tool (C), and the shutoff (20) is removed from the work case. (D), cleaning and applying lubricant to the closure (20) outside the work case (D), and prior to fitting the closure (20) into the cock body (4), With the closing member (20) attached to the closing member insertion/removal tool (E), the working case (D) containing the closing member (20) is airtightly attached to the closed state of the blocking tool (C). A method for repairing a gas cock, in which the air in the working case (D) is purged by connecting the working case (D) with fuel gas. 2. It has a shutoff device (C) that is detachable from the cock body (4) of the fuel gas pipe (A), and a sealed work case (D) that is detachable from the shutoff device (C). , a closure insertion/removal tool (E) for attaching and detaching the closure (20) to the cock body (4) through the isolation device (C);
a purge gas supply path (14) that penetrates the working case (D) in an airtight manner and supplies fuel gas into the working case (D); and the working case (D).
A gas cock repair device in which the work case (D) is provided with a gas discharge path (16) for discharging the air inside to the outside as fuel gas is supplied.