KR20110000044A - Gas cutting torch - Google Patents

Abstract

PURPOSE: A manual gas blocking torch is provided to enhance the cutting force of a basic material and to stably provide gas flame since high-pressure oxygen can be dispersed through a separate pipe. CONSTITUTION: A manual gas blocking torch consists of a body, a pair of coupling nipples, a torch head(26), a cutting tip(28) and a gas guide unit(30). The coupling nipples are connected to the rear of the body through a hose. The torch head supplies the gas by operating each valve. The cutting tip externally blows the gas. The gas guide unit is formed in the torch head. The gas guide unit divides and mixes the flow paths of oxygen and ethylene gases and prevents the backflow of the gas.

Description

Manual Gas Cutting Machine {GAS CUTTING TORCH}

The present invention relates to a manual gas cutting machine, and more particularly, after preheating oxygen and ethylene gas are mixed in a torch head, the gas is more stably provided through a cutting tip, and a high pressure for cutting a base metal is used. By allowing oxygen to be injected along a separate pipeline, the present invention relates to a manual gas cutting machine capable of stably preventing various operations and of preventing backfire or backflow of gas.

In general, the manual gas cutting machine injects oxygen and cutting gas, such as acetylene, ethylene or natural gas, into the main body to make a mixed flame and at the same time, preheats the base metal such as an iron plate with the flame, and then pressurizes the high pressure oxygen. It is widely used as an industrial equipment for cutting the base material into any shape by spraying.

As shown in FIG. 1, a conventional manual gas cutter 10 is provided with a main body via hoses 12A and 12B or pipes from storage tanks 11A and 11B in which oxygen and cutting gas are embedded at a constant pressure. The gas is supplied into (13), and it is comprised so that gas may be selectively supplied and injected to the torch head 15 side by each operation valve 14 mounted in front of this main body 13. As shown in FIG.

Accordingly, after the flame is ignited in the mixed gas jetted from the torch head 15 to preheat the base material, when the temperature of the base material reaches approximately 800 to 900 ° C, the operation valve 14 on the main body 13 side is appropriately adjusted. As the oxygen is supplied at high pressure by adjusting, the cutting part of the base material can be cut while burning.

However, in such a manual gas cutter, it is very important to maintain the stability of the gas flame ejected from the torch head due to its function, and the flame becomes unstable due to unstable gas pressure or clogging or overheating of the cutting tip by foreign matters. This can cause gas backfire or backflow, which can lead to fatal problems by causing a burn or severe gas explosion.

Therefore, in order to prevent backfire of the gas, a check valve for preventing backfire is separately attached to the rear end of the main body of the gas cutter. However, in such a structure, a flame may be backfired into the storage tank to prevent an accident of gas explosion. Even if it is, it could not solve the fundamental problems such as damage caused by the explosion inside the cutting machine and equipment damage which are common in the actual workplace.

Regarding the structure of the manual gas cutting machine, Korean Patent Registration No. 0347964 can easily replace the tip and prevent the occurrence of a safety accident by blocking the backflow gas by a buffer induction port installed inside the gas control port. A technique relating to one "gas cutter" is disclosed.

That is, this technique is equipped with an induction port formed with an inclined fuel gas vortex guideway in the vacancy of the tip mounted to the lower end of the threaded portion of the head body, and in the head body with the heat-resistant packing part connected to the connection formed at the upper end of the induction port. It is connected to the formed oxygen flow path, and at the same time, the end portion formed under the outer circumferential surface of the induction port forms a corrugated fuel gas supply path and is opened together with the cutting oxygen supply path at the tip crater to simultaneously eject the cutting oxygen and fuel gas. It is made up.

However, in this case, since the cutting oxygen and the fuel gas are directly introduced to the induction port side installed in the vacancy of the tip through a flow path formed separately from the head body, the high level of proficiency according to the control of the appropriate amount of gas at the time of spark ignition is achieved. It will cost.

In addition, since the buffer gas inlet is installed in the fuel gas pipe on the main body side of the gas cutter to block the back flow of gas, problems such as worker damage and damage to the device due to explosion in case of backfire into the head body remain intact. It was.

On the other hand, Korean Patent Publication No. 0428424 can greatly reduce the manufacturing process and cost by simplifying the flashback prevention structure, and can perform the original flashback prevention function with little concern for trouble or maintenance. The technique regarding the "gas cutter with a flashback prevention device" which is present is disclosed.

The flashback arrestor in this technique has a housing in which one or more gas discharge holes penetrate the wall and at the same time the first gas conduit protrudes and extends at the tip of the hollow part therein. The gas conduit is composed of a gas induction pipe bundle and a torch head and a gas mixture pipe interposed between the gas pipes are protruded.

However, in the case of the prior art, since the flashback arrestor is installed on the side of the mixed gas pipe constituting the gas cutter, it is cumbersome to manufacture a plurality of parts separately and then reassemble the product. Not only was it an increase factor, but it also impaired the torch head when it was backfired, making it impossible to reuse.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art as described above, and an object of the present invention is to facilitate ignition by mixing and spraying preheated oxygen and ethylene gas transported along each pipeline in a torch head. By providing high pressure oxygen through a separate pipe, it can provide gas flame more stably, increase the cutting force of the base material, and provide a manual gas cutter to prevent backfire or backflow of gas. Is in.

The present invention for achieving the above object, in the conventional gas cutter configured to cut the base material by supplying high pressure oxygen after preheating the base material by oxygen and ethylene gas supplied from each storage tank, A pair of connection nipples are connected to the rear side via a hose from the storage tank, and a torch head to which gas is supplied by each valve operation along a conduit connected from these connection nipples and a tightening nut at the tip of the torch head It is composed of a cutting tip which is mounted by to eject the gas to the outside, the torch head is provided with a gas inducing means for preventing the backfire and backflow of the gas at the same time to separate and mix the flow path of oxygen and ethylene gas The gas inducing means includes a first distribution hole penetrating in the axial direction of the body. And second and third distribution holes penetrating toward the outer circumferential surface of the sieve, respectively.

In addition, the convex portion and the stepped groove are formed in the upper end and the central portion of the body constituting the gas guide means, respectively, characterized in that the first and second outer diameter portion is formed by division.

In addition, the third distribution hole formed in the stepped groove is inclined so as to be connected to the second distribution hole, characterized in that the first and second outer diameter portion are each equipped with a sealing ring.

In addition, the cutting tip which is bound to the front end of the torch head is characterized in that the gas distribution means for maintaining a stable gas flow is further provided.

In addition, the gas flow means is characterized in that the first through hole is passed through the center of the body and at the same time the second through hole formed in the groove formed in the flange of the upper end.

In addition, the lower end of the body constituting the gas distribution means is arranged in the elongated fine grooves along the longitudinal direction, the outer diameter of these micro grooves is characterized in that consisting of a smaller diameter than the body.

According to the manual gas cutter according to the present invention having the characteristics as described above, the preheated oxygen and ethylene gas transported along each pipe line are configured to be sprayed in a mixed state by gas guide means built in the torch head. Therefore, the spark ignition by the mixed gas can be performed more stably and easily.

In addition, since the high pressure oxygen can be injected through the gas distribution means installed in the cutting tip from the torch head, it is possible to ensure the stability of the gas flame ejected through the cutting tip as well as to increase the base material cutting force and This can prevent backflow or backfire.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 7a and 7b are views for explaining a manual gas cutter according to the present invention. In the manual gas cutter 20 to which the present invention is applied, a hose or a pipe from each storage tank on the rear side of the main body 21 is provided. An oxygen connection nipple 22A and an ethylene gas connection nipple 22B connected to each other are mounted, and the valve unit 23 disposed at the front side of the main body 21 has a high pressure oxygen and preheat oxygen valve 24a, Each valve 24c for ethylene gas is mounted, including 24b).

In addition, the high pressure oxygen tube 25a, the preheated oxygen tube 25b, and the ethylene gas tube 25c are arranged side by side from the valve unit 23, and the torch head 26 is connected to the front end thereof. A cutting tip 28 is fastened to the threaded portion 27a formed in the body of (26) in a substantially vertical direction while being held in the fastening nut 29.

With this configuration, after preheating the base material by igniting a flame with preheated oxygen and ethylene gas mixed in the torch head 26 and injected from the cutting tip 28, the temperature of the base material reached about 800 to 900 ° C. When the high pressure oxygen is supplied to the base material can be cut.

The torch head 26 mixes the preheated oxygen and ethylene gas supplied along the respective pipe lines and at the same time separates the high-pressure oxygen and injects them into the cutting tip 28, and a gas for preventing backfire or backflow of the gas. Guide means 30 is provided.

The gas guiding means 30 is formed with a second distribution hole 31b, which penetrates toward the outer circumferential surface of the body, including a first distribution hole 31a penetrating in the axial direction of the body. The 3rd distribution hole 31c is formed in the inclined state, and is comprised so that it may connect with the 2nd distribution hole 31b.

The convex part 32 and the step groove 33 are formed in the upper end part and the center part of the body which comprise the said gas guide means 30, respectively, and the 1st and 2nd outer diameter parts 34A and 34B are provided, The first and second outer diameter portions 34A and 34B are respectively equipped with sealing rings 35a and 35b made of synthetic resin or rubber material.

On the other hand, the cutting tip 28 that is bound to the tip of the torch head 26 is provided with a gas distribution means 36 for maintaining the gas flow more stably.

In the center of the body of the gas flow means 36 is formed a second through hole 37b facing each other in the groove formed in the flange 38 of the upper end while the first through hole 37a is penetrated. There is a plurality of fine grooves (39a) long along the longitudinal direction is made of a smaller diameter than the body.

In addition, the upper end of the cutting tip 28 is formed with a stepped portion (28a) is fixed to the position by the locking step (29a) integrally formed on the bottom portion of the tightening nut 29, the tightening nut 29 torch By fastening to the screw portion 27a of the head 26, the gas guide means 30 and the gas flow means 36 can be tightly fixed.

According to the present invention configured as described above, when the main body 21 of the manual gas cutter 20 is held and the ethylene gas valve 24c and the preheated oxygen valve 24b are sequentially opened slightly, the ethylene gas pipe 25c and Each gas is transferred to the torch head 26 side along the preheated oxygen pipe 25b, and the gas guide means 30 and the gas flow means 36 provided in the torch head 26 and the cutting tip 28 are provided. Through the mixed gas is injected to the outside.

That is, the ethylene gas is transferred toward the stepped grooves 33 formed on the outer circumferential surface of the body of the gas induction means 30 mounted in the torch head 26, and is supplied through the third distribution hole 31c while the preheated oxygen is convex. The second through hole formed in the groove of the flange 38 of the gas flow means 36, which is supplied through the second distribution hole 31b penetrating toward the portion 32 and mixed with each other, is installed in the cutting tip 28 again. It is injected to the outside through the fine groove (39a) formed in the 37b and the outer peripheral surface of the lower end of the body.

Therefore, the mixed gas is ignited from the outside of the cutting tip 28, and then the flame is adjusted as necessary according to the working condition of the base material, and then the preheating of the base material is maintained while maintaining the distance between the flame and the base material about 3 to 5 mm. .

After that, when the temperature of the base material reaches approximately 800 to 900 ° C., the first distribution hole formed in the center of the gas induction means 30 and the gas flow means 36 is opened by opening the high pressure oxygen valve 24c again. 31a) and the first through hole (37a) is a high-pressure oxygen is strongly sprayed to the outside of the cutting tip 28 to cut the base material.

At this time, since the sealing rings 35a and 35b are mounted on the inner surface of the torch head 26 and the first and second outer diameter portions 34A and 34B of the gas guide means 30, the mixed gas backfires or flows back. This phenomenon can be prevented more reliably.

The technical problem of the present invention is achieved by the technical configuration as described above, although the present invention has been described by a limited embodiment and drawings, the present invention is not limited thereto but by those skilled in the art to which the present invention pertains. Various modifications and variations are possible, without departing from the spirit and scope of the appended claims.

1 is a view showing a use example of a general manual gas cutting machine,

2 is a front configuration diagram of a manual gas cutter to which the present invention is applied;

3 is a perspective view separately showing each component of the torch head of FIG. 2;

4a to 4c are views for explaining the configuration of the gas inducing means,

5a to 5c are views for explaining the configuration of the gas distribution means,

6 is a cross-sectional view of the engagement state of the torch head portion;

7A and 7B are cross-sectional configuration diagrams showing the gas flow in the gas guiding means and the gas circulating means.

<Description of the symbols for the main parts of the drawings>

20: manual gas cutting machine 21: main body

22A, 22B: Connection nipple 23: Valve unit

24a, 24b, 24c: valve 25a: high pressure oxygen tube

25b: preheated oxygen tube 25c: ethylene gas tube

26: torch head 27a: screw portion

28: cutting tip 28a: step

29: tightening nut 29a: locking jaw

30: gas guiding means 31a, 31b, 31c: distribution hole

32: convex part 33: stepped groove

34A: First Outer Neck 34B: Second Outer Neck

35a, 35b: sealing ring 36: gas distribution means

37a, 37b: through hole 38: flange

39a: microgroove

Claims (6)

In the conventional manual gas cutting machine configured to cut the base material by supplying high pressure oxygen after preheating the base material by oxygen and ethylene gas supplied from each storage tank, A torch head is provided with a pair of connecting nipples 22A and 22B connected to the rear of the main body 21 via a hose from a storage tank, and to which gas is supplied by each valve operation along a conduit connected from these connecting nipples. (26) and a cutting tip (28) mounted at the distal end of the torch head by a tightening nut (29) for ejecting gas to the outside, The torch head 26 is provided with a gas induction means 30 for distinguishing and mixing the flow paths of oxygen and ethylene gas and at the same time to prevent backfire and backflow of the gas. Passive gas cutting machine, characterized in that the second and third distribution holes (31b, 31c) penetrating toward the outer circumferential surface of the body, including the first distribution hole (31a) penetrating in the direction. The convex part 32 and the stepped groove 33 are formed in the upper end part and the center part of the body which comprise the said gas guide means 30, respectively, and the first and second outer diameter parts ( Manual gas cutter, characterized in that the 34A, 34B) are divided. The third distribution hole (31c) formed in the stepped groove (33) is inclined so as to connect with the second distribution hole (31b), the first and second outer diameter portion (34A, 34B) Manual gas cutters, characterized in that the sealing ring (35a, 35b) is mounted respectively. 2. The manual gas cutter according to claim 1, further comprising a gas flow means (36) for stably maintaining the gas flow in the cutting tip (28) which is bound to the tip of the torch head (26). . The gas distribution means (36) is provided with a second through hole (37b) facing each other in a groove formed in the flange (38) of the upper end while the first through hole (37a) passes through the center of the body. Manual gas cutting machine, characterized in that formed. The method of claim 5, wherein the lower end of the body constituting the gas distribution means 36 is arranged in the longitudinal elongated fine grooves (39a), the outer diameter of these fine grooves is made of a smaller diameter than the body Characterized by manual gas cutting machine.

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