JPS6039611Y2 - Valve operating device in mixed combustor - Google Patents

Description

[Detailed description of the invention] This invention is a dual-fluid system that mixes and burns a fuel gas such as acetylene gas or butane gas and combustion oxygen (air is also acceptable), such as a torch used for welding or fusing. The purpose is to improve the valve operation device of a mixed combustor, and its main purpose is to simultaneously open and close the two valves interposed in each of the two types of fluid supply paths with a simple operation, and Once the opening of both valves is adjusted, the initially set mixture ratio will not be changed, and no matter how many times the ignition is started, combustion will always be performed at the same mixture ratio. The purpose of this invention is to improve safety by ensuring instantaneous valve closing in an emergency, and to simplify the structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, embodiments of the present invention will be described below with reference to the drawings in the case where a hand-held torch is used as a mixed combustor.

As shown in FIG. 1, the hand-held torch has a main body 1, a blowpipe 2 connected to the main body 1, a grip part 3 fitted onto the main body 1, and a dual-fluid supply hose 4 connected to the main body 1. , 5 extend through the grip portion 3.

Reference numeral 6 denotes a cylindrical stopper member screwed onto the main body 1 in order to fix the blowpipe 2 to the main body 1.

As shown in FIG. 2, the main body 1 is formed with supply passages 7 and 8 for two types of fluid, and the fuel gas and oxygen gas that have passed through the supply passages 7 and 8 as shown by the arrows are delivered to the base end of the blowpipe 2. The mixture is configured to be mixed in a part.

Both the hoses 4 and 5 are connected to hose ends 9 and 10 that are threadedly connected to the main body 1 so as to communicate with the respective supply passages 7 and 8.

11... is an airtight gasket interposed between the base end of the blowpipe 2 and the main body 1.

At a midpoint in the axial direction of the supply passages 7 and 8, one operating tool 12 that crosses both the supply passages 7 and 8 is provided so as to be able to reciprocate along the transverse direction.

This single operating tool 12 is attached to the main body 1 so that it can also rotate around its own axis.

Tapered valve seats 7a, 8a are formed in the respective supply passages 7, 8 facing the operating tool 12, and these valve seats 7a, 8
Valves 13 and 14 that can be brought into contact with a are provided within the supply passages 7 and 8 so as to be movable along their axial directions.

These valves 13, 14 are each operated by springs 15, 16.
Valve seat 7a is always on.

The supply passages 7 and 8 are closed in close contact with the supply passage 8a.

The single operating tool 12 and both valves 13 and 14 are related to each other as follows.

That is, as shown in FIGS. 3 and 4, the multiple valve 1 of the operating tool 12
3° 14, when this operating tool 12 is pushed up, both valves 13 and 14 are opened simultaneously against the springs 15 and 16, and when pushed down, both valves 13 and 14 are opened simultaneously. ，
14 and springs 15, 16 are provided with stepped surfaces 17, 18 which can be actuated to close the valve simultaneously.

Furthermore, the multiple valves 13 and 1 of the operating tool 12 in the valve opening operating position are
4 [lower half portions of the stepped surfaces 17 and 18], the respective peripheral surfaces move both valves 13 and 14 forward when the operating tool 12 is rotated around its axis. Or move it back and simultaneously adjust its opening [that is, the strength of the combustion state]
cam surface 19,20 actuated to permit variable adjustment.

The cam surfaces 19 and 20 have congruent or almost congruent shapes or similar shapes, so that the air-fuel ratio is always constant or almost constant regardless of changes in the absolute flow rates of fuel gas and oxygen gas based on opening adjustment. is maintained.

The circumferential surface of the part of the operating tool 12 in the valve-closing position that is in contact with the multi-valves 13 and 14 [the upper half of the stepped surface 17 and 18] is a perfect circle on the same layer as the axis of the operating tool 12. Therefore, even if the operating tool 12 is rotated in this position, there will be no change in the valve closed state.

Pushing down and pushing up the operating tool 12 for opening and closing the valve is possible even if the operating tool 12 is at any phase position in its rotation range.

21... is an airtight gasket fitted onto the operating tool 12.

Incidentally, reference numeral 22 denotes a regulating valve for correcting a decrease in combustibility due to a relative fluctuation in the supply pressures of both gases.

This regulating valve 22 includes a bypass passage 23 formed in the main body 1 so as to connect an upstream portion and a downstream portion of the valve 13 in the supply passage 7 on the fuel gas side (the oxygen gas side or both may be used).
It is screwed onto the main body 1 so that it can be opened and closed and the flow rate can be finely adjusted by the needle of the valve 22, and an airtight gasket 24 is fitted around its periphery.

Therefore, by opening the regulating valve 22, the supply amounts of both gases are returned to the proper state, thereby normalizing the combustibility.

It goes without saying that the present invention is not limited to hand-held torches, and may be applied to various types of mixed combustors.

In summary, the valve operating device for a mixed combustor according to the present invention includes valves 13 and 14 that can be opened and closed and whose opening degrees can be adjusted in each of the supply paths 7 and 8 for the two fluids to be mixed and combusted. The single operating tool 12 can be reciprocated in the transverse direction while crossing the supply paths 7 and 8,
The single operating tool 12 is provided rotatably around its axis, and both valves 13 and 14 are simultaneously connected to portions of the single operating tool 12 corresponding to the respective supply paths 7 and 8 by reciprocating the operating tool 12. It has a functional surface 17.18 that operates to open and close, and
A cam that simultaneously adjusts the opening degrees of both the valves 13 and 14 by rotating the circumferential surface of the stepped surface 17 and 18 at a position corresponding to the valve opening operation of both the valves 13 and 14. It is characterized by having a shape similar to surfaces 19 and 20, and has achieved the following effects.

That is, the valve 13.1 interposed between the two fluid supply paths 7 and 8
4 can be opened and closed by simply reciprocating the single operating tool 12, which not only makes the structure much easier to construct than when separate opening/closing operating tools are provided for both valves. , the operation can be extremely simplified and streamlined, and once the opening degree is adjusted accurately, the mixing ratio of both fluids can be prevented from changing unexpectedly.
Good combustion can be achieved by always keeping the initially set optimum mixture ratio the same.

Furthermore, since the opening and closing operations of both valves 13 and 14 are performed simultaneously by the single operation tool 12, it is possible to reliably prevent forgetting to open or close one of the valves, and this greatly reduces the risk of forgetting to open or close one of the valves. It is possible to demonstrate great safety and great speed when starting and stopping work.

In particular, in the event of combustion abnormalities such as backfire or blow-off, or unexpected blow-out, simply moving the operating tool 12 along its axis will instantly close both valves 13 and 14 and stop the fluid supply. Therefore, it can be treated extremely safely and quickly.

In addition to the above-mentioned advantages, in the present invention, the peripheral surfaces of the stepped surfaces 17 and 18 of the operating tool 12 at positions corresponding to the valve opening operation of both the valves 13 and 14 are rotated at this position. Since this is similar to the cam surface 19 and 20 that adjusts the opening of valves 14 and 14 at the same time, separate opening adjustment tools may be provided for both valves, or the opening adjustment tool may be provided separately from the opening/closing tool. This has the advantage that the structure can be simplified, the operability can be simplified and rationalized, and the opening degrees of both valves 13 and 14 can always be maintained in a predetermined relative relationship.

[Brief explanation of drawings]

The drawings show an embodiment of the valve operating device for a mixed combustor according to the present invention, with FIG. 1 being a perspective view of a hand-held torch, FIG. figure,
FIG. 4 is an enlarged cross-sectional plan view of the main part. 7.8... Fluid supply path, 12... Operation tool, 13.14... Valve, 17.18...
・Stepped surface, 19°20...Cam surface.

Claims (1)

[Claims for Utility Model Registration] ■ A valve 13.14 that can be opened/closed and whose opening degree can be adjusted is interposed in each of the supply passages 7.8 for the two fluids to be mixed and burned, and both supply passages 7.8 A single operating tool 12 is provided so as to be reciprocally movable in the transverse direction and rotatable around its axis while crossing the
Stepped surfaces 17 and 18 are formed in portions corresponding to the respective supply passages 7 and 8 of No. 2, respectively, for opening and closing both the valves 13 and 14 simultaneously by reciprocating movement of the operating tool 12. A cam surface 19 which simultaneously adjusts the opening degree of both the valves 13, 14 by rotating the circumferential surfaces of the surfaces 17, 18 at positions corresponding to the valve opening operation of the valves 13, 14 at the positions corresponding to the valve opening operation. 20. A valve operating device for a mixed combustor, characterized in that the valve operating device is formed in a shape of 20. (i) At least one of the fluid supply paths 7 and 8 has a bypass path 23 that connects the upstream and downstream portions of the valve 13 and has a regulating valve 22 that can be opened and closed in the middle. A valve operating device for a mixed combustor according to claim 2 of the registered utility model.