KR20170052140A

KR20170052140A - Gas torch safety valve

Info

Publication number: KR20170052140A
Application number: KR1020150154222A
Authority: KR
Inventors: 김승열; 박인수
Original assignee: 킴스엔지니어링 주식회사
Priority date: 2015-11-04
Filing date: 2015-11-04
Publication date: 2017-05-12
Also published as: KR101871370B1

Abstract

The present invention provides a safety valve for a gas torch, capable of surely performing a safety function in comparison with an existing safety valve. According to the present invention, the safety valve comprises: a nipple (10) connected to a gas supply unit and connected to a gas supply port of a gas torch (2); and a check valve (20) installed inside the nipple (10) to prevent a flame from reversely flowing towards the gas supply unit from a gas supply port side of the gas torch (2) inside the nipple (10). The nipple (10) comprises: a nipple body part (12) having a space part inside and having an opened part on both end parts; a connection body part (14) integrally formed on one end part of the nipple body part (12) and connected to the gas supply part; and a body (16) having a space part inside and an opened part on both end parts, and connected to the other end part of the nipple body part (12). The check valve (20) includes first to third check valves (22, 24, 26) disposed towards a base part from the tip part of the nipple (10).

Description

[0001] The present invention relates to a gas torch safety valve,

The present invention relates to a safety valve for a gas torch, and more particularly, to a safety valve for a new gas torch, which prevents a case where the gas torch is detached from the gas torch separately and can reliably perform a safety function.

Both gas torches for cutting metal and welding torches for welding metal are supplied with combustion gases. As the combustion gas, a gas having a high ignitability, acetylene or LPG is used. Acetylene and LPG are explosive gases that are supplied with a small amount of torch together with oxygen to generate a flame, and the metal is cut or welded while the metal is heated by the flame. The gas torch is used for cutting, heat treating, melting or welding a workpiece made of a metal material. For this work, a gas torch is supplied with a gas and an oxygen control valve, Often, careless handling of the operator often causes leakage of gas and oxygen due to unintentional opening of the gas or oxygen control valve. The leakage of gas and oxygen from the gas torch in such a situation that the operator is not aware of causes a serious problem leading to a large explosion accident. In particular, a safety valve mounted on a conventional gas torch protrudes from the back of the gas torch so that when the gas torch is dropped during operation, the safety valve portion is deflected and the safety valve is burned. There is a problem that a large explosion occurs due to the gas leakage as described above.

In addition, there is a problem that the expensive safety valve alone can be detached from the gas torch. That is, if only the safety valve is detached, there is a problem that the expensive safety valve is stolen.

Korean Patent Laid-Open No. 10-2012-0010594 (published Feb. 26, 2012) Korean Patent No. 10-1075520 (registered on October 14, 2011)

The present invention prevents the case where the gas torch is separated from the gas torch and prevents the case from being stolen. Even if there is a mistake such as dropping the gas torch during use of the gas torch, And to provide a safety valve for a new gas torch which can be surely performed.

According to an aspect of the present invention, there is provided a plasma processing apparatus comprising: a nipple connected to a gas supply unit and connected to a gas supply port of a gas torch; And a check valve provided inside the nipple for preventing the flame from flowing back toward the gas supply unit from the gas supply port side of the gas torch in the nipple.

The nipple includes a nipple body portion having a space portion therein and an opening portion at both ends; And a connection body part integrally formed at one end of the nipple body part and connected to the gas supply part.

The nipple further includes a body having a space portion therein and having an opening portion at both ends thereof and connected to the other end portion of the nipple body portion. The check valve is disposed in order from the tip end portion of the nipple toward the base end portion A first check valve, a second check valve, and a third check valve.

Wherein the first check valve, the second check valve, and the third check valve each include an inner space portion opened toward the front end portion and a plurality of holes provided at the peripheral portion to communicate with the inner space portion, Wherein the second check valve further includes a check valve sleeve on an outer circumferential surface thereof, the check valve sleeve has a proximal passage hole and a distal passage hole, and a filter having a plurality of holes communicating with the inner and outer surfaces, And is provided between the check valve and the third check valve.

In the present invention, the nipple portion mounted on the gas torch is connected to the gas supply pipe or the like of the gas supply portion, so that even when the gas torch is dropped during the operation, the nipple portion is prevented from being burned, There is no case where the gas is hardened due to the prevention of the burn-out, and there is an advantage of preventing a large explosion accident by the gas leakage as described above.

Further, in the present invention, the nipple is firmly connected to the gas supply pipe of the gas supply unit, and thus solves the problem that only the safety valve of the present invention can be detached from the gas torch. The safety valve is prevented from being stolen.

Of course, the present invention has various effects in addition to the above effects, but the above-described effects are considered to be the main effects of the present invention.

1 is a side view of a safety valve for a gas torch and a gas torch according to the present invention;
2 is a perspective view of the safety valve for a gas torch shown in Fig.
3 and 4 are side sectional views showing the structure and operation state of the safety valve for a gas torch according to the present invention
5 is a perspective view of a safety valve for a gas torch according to another embodiment of the present invention.
6 and 7 are side sectional views showing the structure and operating state of the safety valve for a gas torch shown in Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. For example, if a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, It is to be understood that other components may be "connected "," coupled "

The safety valve for a gas torch according to the present invention includes a nipple 10 connected to a gas supply unit and connected to a gas supply port of a gas torch 2 and a nipple 10 provided inside the nipple 10, And a check valve 20 for preventing the flame from flowing back from the gas supply port side of the gas torch 2 toward the gas supply portion.

The nipple 10 includes a nipple body portion 12 and a connection body portion 14. The nipple body portion 12 and the connection body portion 14 are in the form of a circular tube section. The inner diameter of the nipple body portion 12 is larger than the outer diameter of the connection body portion 14. An opening portion is provided at the distal end portion of the nipple body portion 12, and the distal end portion of the connection body portion 14 is integrally connected to the proximal end portion of the nipple body portion 12. That is, the nipple 10 includes a nipple body portion 12 having a space portion therein and an opening portion at both ends thereof, a connection body portion 12 integrally provided at one end of the nipple body portion 12 and connected to the gas supply portion, (14). At this time, a plurality of jaws are provided on the outer peripheral surface of the connection body portion 14 at regular intervals along the longitudinal direction. On the other hand, the nipple 10 may further include a body 16. The body 16 has a space portion therein and has openings at both ends thereof and is connected to the other end of the nipple body portion 12. [ The proximal end of the nipple 10 is connected to a gas supply pipe or the like of the gas supply section and the tip end of the nipple is connected to the plug 4 (gas supply plug) provided in the gas torch 2. The tip end portion of the nipple body portion 12 is connected to the plug 4 of the gas torch 2 and the connection body portion 14 is rigidly connected to the gas supply pipe provided to the gas supply portion. The tip end portion of the nipple is connected to the plug 4 of the gas torch 2 because the body 16 provided in the gas torch 2 is connected to the plug 4 of the gas torch 2.

The check valve 20 includes a first check valve 22, a second check valve 24 and a third check valve 26 arranged in order from the front end to the proximal end of the nipple 10. At this time, the first check valve 22, the second check valve 24 and the third check valve 26 have an inner space IC opened to the front end, And a plurality of holes (H) provided in the base. On the other hand, the second check valve 24 is further provided with a check valve sleeve 28 on the outer circumferential surface thereof, and the check valve sleeve 28 has a proximal end side passage hole and a distal end side passage hole.

Further, a filter 29 having a plurality of holes communicating with the inner and outer surfaces is provided between the second check valve 24 and the third check valve 26. The inner surface of the filter 29 is spaced from the outer circumferential surface of the second check valve 24 by a predetermined distance so that a space is secured between the inner surface of the filter 29 and the outer circumferential surface of the second check valve 24, The distal end of the filter 29 is connected to the distal end of the second check valve 24 and the proximal end of the filter 29 is connected to the distal end of the third check valve 26.

The present invention further includes a check packing PK provided at the periphery of the first check valve 22, the second check valve 24 and the third check valve 26, The check packing PK of the valve 22 is configured to come into close contact with the tapered portion TP provided on the inner circumferential surface of the body 16 and the check packing PK of the second check valve 24 is connected to the check valve sleeve And the check pack PK of the third check valve 26 is closely attached to the tapered portion TP provided on the inner peripheral surface of the nipple 10, do.

The third check valve 26 is coupled to the inside of the nipple 10 so as to be able to move back and forth and a front cap 27 is provided inside the nipple 10 so as to be disposed at the tip of the third check valve 26 And the hole H of the third check valve 26 has a plurality of front holes H communicating with the inner and outer peripheral surfaces of the front cap 27 and a plurality of front holes H communicating with the inner and outer peripheral surfaces of the third check valve 26, Rear holes (H). A spring (SP) is interposed between the third check valve (26) and the front cap (27).

The second check valve 24 is provided with a support piece 25 in the base end side internal space IC and the support piece 25 of the second check valve 24 is provided with a hole H And a spring SP is interposed between the support piece 25 and the second check valve 24 and between the base end of the first check valve 22 and the support piece 25, .

The nipple 10 includes a body 16 and a locking cap 17. The locking cap 17 is coupled to the front end of the body 16 of the nipple 10 such that the locking cap 17 can be pushed forward from the front end of the body 16, (SP) and a locking ball (18) coupled to a ballhole (H) communicating with the inner and outer peripheral surfaces of the locking cap (17). At this time, the locking ball 18 is configured to contact the tapered portion TP provided on the inner circumferential surface of the body 16. The spring SP pushes the locking cap 17 so that the locking ball 18 can resiliently contact the tapered portion TP of the inner peripheral surface of the body 16. [

5 to 7 are views showing a safety valve according to another embodiment of the present invention. 5 to 7, the nipple 10 is integrally formed with the nipple body portion 12 and the connection body portion 14, and the shape of the connection body portion 14 is different from that of the connection body portion 14 of the embodiment of the present invention ), But the functions are the same. The connection body portion 14 of another embodiment of the present invention is firmly connected to the gas supply pipe of the gas supply portion by a fixing means such as a clamp. Of course, the functions and effects of the other embodiments of the present invention are the same as those of the above-described embodiment of the present invention, and a duplicate description thereof will be omitted.

According to the present invention having the above-described configuration, the nipple 10 is connected to the gas supply unit. The connection body portion 14 constituting the nipple 10 is fitted in the gas supply hose of the gas supply portion and the connection body portion 14 fitted to the gas supply hose can be fixed to the gas supply hose by a fixing means such as a clamp have.

When gas is supplied through the gas supply hose and enters the interior of the nipple 10, gas enters into the third check valve 26 through the hole H of the third check valve 26, The gas exiting through the hole H of the check valve 26 enters the interior of the filter 29 again through the pores of the filter 29 and flows through the hole H of the second check valve 24 Gas is introduced and the gas again pushes the second check valve 24 and passes through the second check valve 24 through the hole H of the second check valve 24 and the second check valve 24 24 through the hole H of the first check valve 22 and then supplied to the torch 2 through the inner passage of the body 16, (2) can be ignited by gas. At this time, a metal filter may be used as the filter 29 in the present invention. It will be appreciated that the metal filter can be an example of the filter 29.

The first check valve 22 is pushed toward the second check valve 24 by the pressure of the gas flowing backward to return the gas even if the gas flows from the torch 2 toward the nipple 10 and tries to flow backward The second check valve 24 is pushed toward the third check valve 26 so that the gas is returned to the second check valve 26 by the second check valve 22, And the third check valve 26 is pushed toward the gas supply port of the nipple 10 to prevent the gas backflow passage (or the flame backflow passage) from leaking to the gas supply port of the nipple 10 even if the second check valve 24 does not properly shut off the gas backflow passage. ), Which prevents the backflow of the gas or the backflow of the flame.

Accordingly, the present invention prevents the leakage of gas and oxygen from the gas torch 2 in situations where the operator is unaware of it by the check valves 20, so that serious problems that lead to a large explosion accident due to gas backflow or leakage There is an advantage of solving the problem.

In the present invention, since the portion of the nipple 10 mounted on the gas torch 2 is connected to the gas supply pipe of the gas supply portion, the gas torch 2 needs only to be connected to the nipple 10, It is possible to prevent a case where the nipple 10 is burned as if the portion is bent even if the nipple 10 is dropped and the gas is not hardened due to the burning prevention of the nipple 10, To prevent a large explosion accident.

Further, in the present invention, the nipple 10 is rigidly connected to the gas supply pipe of the gas supply unit, thereby solving the problem that only the safety valve of the present invention can be taken apart from the gas torch 2. That is, if only the safety valve of the present invention is separately detached, there arises a problem that the expensive safety valve is stolen, and the present invention does not cause the problem of the theft.

The specific embodiments of the present invention have been described above. It is to be understood, however, that the scope and spirit of the present invention is not limited to these specific embodiments, and that various modifications and changes may be made without departing from the spirit of the present invention. If you have, you will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

10. Nipple 12. Nipple body part
14. Connection body 20. Check valve
22. First check valve 24. Second check valve
26. Third check valve 29. Filter

Claims

A nipple 10 having a proximal end connected to the gas supply unit and a distal end connected to the gas supply port of the gas torch 2;
And a check valve 20 provided inside the nipple 10 to prevent the flame from flowing back toward the gas supply unit from the gas supply port side of the gas torch 2 in the nipple 10 Safety valve for gas torch.

The method according to claim 1,
The nipple (10)
A nipple body portion 12 having an inner space portion and an opening portion at both ends thereof;
And a connection body part (14) integrally formed at one end of the nipple body part (12) and connected to a gas supply part.

3. The method of claim 2,
The nipple 10 further includes a body 16 having a space therein and an opening at both ends and connected to the other end of the nipple body 12,
The check valve (20)
And a first check valve (22), a second check valve (24) and a third check valve (26) arranged in order from the front end to the proximal end of the nipple (10) .

The method of claim 3,
The first check valve 22, the second check valve 24 and the third check valve 26 have an inner space part IC opened toward the front end part and an inner space part IC connected to the inner space part IC And a plurality of holes (H) provided in the peripheral portion,
The second check valve 24 further includes a check valve sleeve 28 on the outer circumferential surface thereof. The check valve sleeve 28 has a proximal end side passage hole and a distal end side passage hole,
Characterized in that a filter (29) having a plurality of holes communicating with the inner and outer surfaces is provided between the second check valve (24) and the third check valve (26).

5. The method of claim 4,
The inner surface of the filter 29 is spaced apart from the outer circumferential surface of the second check valve 24 by a predetermined distance so that a space is secured between the inner surface of the filter 29 and the outer circumferential surface of the second check valve 24 Wherein the tip of the filter is connected to the tip of the second check valve and the base of the filter is connected to the tip of the third check valve. Safety valve for.

The method of claim 3,
The first check valve 22, the second check valve 24, and the third check valve 26. The first check valve 2 and the second check valve 26 are provided on both sides of the first check valve 2, The check packing of the second check valve (24) is in close contact with the tapered portion provided on the inner peripheral surface of the check valve sleeve (28) , And the check packing of the third check valve (26) is configured to be closely attached to a tapered portion provided on an inner peripheral surface of the nipple (10).

5. The method of claim 4,
The third check valve 26 is coupled to the inside of the nipple 10 so as to be able to move back and forth. The nipple 10 is provided therein with a front cap disposed at the tip of the third check valve 26, The hole of the third check valve 26 includes a plurality of front holes communicating with the inner and outer peripheral surfaces of the front cap and a plurality of rear holes communicated with the inner and outer peripheral surfaces of the third check valve 26 Safety valve for gas torch.

8. The method of claim 7,
And a spring (S) interposed between the third check valve (26) and the front cap.

5. The method of claim 4,
The second check valve (24) is provided with a support piece on the base end side internal space portion, and the support piece has a hole communicated on both sides, and a spring (S) is provided between the support piece and the second check valve , And a spring (S) is interposed between the base end of the first check valve (22) and the support piece.

3. The method of claim 2,
A locking cap coupled to the tip of the body (16) of the nipple (10) so as to be capable of moving forward and backward;
A spring S for resiliently urging the locking cap forward from the distal end of the body 16;
And a locking ball coupled to a ball hole communicating with the inner and outer peripheral surfaces of the locking cap.

11. The method of claim 10,
Wherein the locking ball is configured to contact a tapered portion provided on an inner circumferential surface of the body (16).