KR20150112203A - Rotary joint for gas supply hose of gas cutting apparatus - Google Patents

Abstract

The present invention relates to a rotary joint for preventing the twist of a hose and, more specifically, to a rotary joint for a gas supply hose of a gas cutting device, wherein in a steel material fusing gas cutting device, the separate moving flows of oxygen and fuel gas are connected in the middle of the hose, and the hose, which branches into two strands, is prevented from being twisted or entangled during the operation of cutting a steel material. According to the present invention, the rotary joint for a gas supply hose of a gas cutting device comprises: a manifold having the oxygen hose and the fuel gas hose of each bombe connected to the same fore-end at one side and keeping the separate flows of oxygen gas and fuel gas injected from the oxygen hose and the fuel gas hose; and a cylindrical rotating cap having another oxygen hose and another fuel gas hose, which supplies the oxygen gas and the fuel gas having gone through the manifold to a torch, connected to the same fore-end at the other side, and preventing the twist of the hose by allowing a facing side to rotate freely by 360 degrees in both directions while enveloping part of the manifold.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rotary joint for a gas supply hose of a gas cutting machine,

The present invention relates to a rotary joint for preventing hose kinks and, more particularly, to a steel material fusing gas cutter, which keeps separate flow of oxygen and fuel gas in the middle of the hose, The present invention relates to a rotary joint for a gas supply hose of a gas cutter in which two-stranded hoses are not twisted or tangled with each other.

A gas cutting apparatus (also referred to as an "oxygen cutting apparatus") refers to a device for cutting a steel material by using oxygen hydrogen flame, oxygen acetylene flame, or the like, This includes gas generators or bombs and conduits (gas supply hoses), bubble tubes (torch) (hereinafter referred to as "torches") and backfire protectors do.

The gas cutting using the gas cutter can be performed by fusing a steel material by using the heat of reaction of the iron due to the combustion heat of the fuel gas (such as acetylene) . That is, when the steel material is heated and melted by using the heat of combustion of the fuel gas and high-purity oxygen is blown thereon, a rapid oxidation reaction of iron occurs in the molten material of the steel material, and the material is cut using the generated heat.

Therefore, it is widely used as a work tool for quickly and easily cutting various steel materials such as steel plates and steel pipes in construction sites dealing with steel structures and various industrial sites for processing steel products.

However, even though the spark generated during the steel cutting operation is kept at a distance from the torch so that the gas does not protrude to the compressed and stored bomb side, the two gas supply hoses (oxygen gas, Fuel gas) can not be avoided. Therefore, when the operator alternately takes various positions, the gas supply hoses divided into two strands are twisted or tangled to each other to cause inconvenience, and the gas supply hose cracks due to frequent twists and tangles, There have been frequent blasts of explosions.

In order to solve such a problem, Korean Utility Model Registration No. 20-0346401 discloses a fuel gas supply hose and an oxygen supply hose made of a fluororesin material, respectively, and a plurality of hoses are connected to a single conductor A hose for fuel supply of an oxygen cutter adapted to be unified has been disclosed.

1 shows a state of use of an oxygen cutter according to the prior art, wherein a fuel supply hose 900 of a conventional oxygen cutter is connected to a gas storage tank 901 at one side, as shown in FIG. 1, A fuel gas supply hose 920 of fluorocarbon resin, which is connected to the oxygen cutter 903 and allows the fuel gas to move inward; An oxygen supply hose 910 made of a fluororesin material, one side of which is connected to the oxygen storage tank 902 and the other side is connected to the oxygen cutter 903, and oxygen is allowed to move inward; The fuel gas supply hose 920 and the oxygen supply hose 910 are covered with the fuel gas supply hose 920 and the oxygen supply hose 910 so as to be in close contact with each other to protect the fuel gas supply hose 920 and the oxygen supply hose 910 from external pressure, And a connection cover 930 made of a flexible synthetic resin material so as to be possible.

According to the related art, the fuel gas supply hose 920 and the oxygen supply hose 910, which are divided into two strands, are unified into one conductor, thereby preventing the hose from being twisted or tangled.

However, due to the structural relationship in which a plurality of gas storage tanks 901, i.e., the oxygen gas compression-stored bomb and the fuel gas compressed and stored bomb side, must be additionally connected to an existing gas supply hose for individual gas supply, Has been pointed out.

Moreover, unlike the gas supply hoses, which are problematic in use, only a part of the gas supply hoses have been replaced, so that there is a need to replace the entire hose due to the unified structure of a single wire.

Registered Utility Model No. 20-0346401 (Registered on Mar. 3, 2004)

The object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a manifold for guiding two kinds of gas moving flows individually and a rotatable cap capable of bi- A gas supply hose of a gas cutter which is connected to each of the bombs by a torch so that the hoses are not twisted or tangled with each other due to the free rotation of the rotary cap when the oxygen hose and the fuel hose are twisted so as to supply oxygen gas and fuel gas separately. To a rotary joint.

In order to accomplish the above object, the present invention provides a fuel cell system including an oxygen hose and a fuel hose, each of which is connected to one end of an oxygen hose and a fuel hose, ; And the other oxygen hose supplying the oxygen gas and the fuel gas through the manifold to the torch and the fuel hose are connected to the other tip of the other side while the opposite side is connected to the manifold through a 360 ° bidirectional free rotation And a cylindrical rotary cap for preventing the hose from being twisted.

The manifold may include a head portion having a stepped portion extending from an outer diameter of the side portion inserted into the rotatable cap and a first supply path extending through the flow of oxygen gas through the longitudinal direction, A second supply passage for separately flowing a flow of the fuel gas along the longitudinal direction is further formed in the inside of the rotor, and at the front end of the head portion, in order to provide a space for allowing the flow of gas upon fitting into the inside of the rotor cap, A recessed groove communicating with the first supply path is formed inwardly and a circumferential groove communicating with the second supply path is formed around the head portion in order to provide a space for circulating gas even when the rotary cap rotates And a first fitting portion communicating with the first supply passage by connecting an oxygen hose connected to the oxygen cylinder is provided at the opposite side of the head portion from the front end Output is formed by connecting the fuel hose connected to the fuel cylinder is characterized by extending a predetermined length formed from more defined El keep the perimeter to the second supply the tip with a second fitting pipe portion so as to communicate with.

In addition, the rotary cap has a cylindrical shape in which a mounting hole for fitting the head portion is provided, and one side is opened so as to surround the front end of the head portion inserted into the mounting hole, while the other side is closed A hole for accommodating the inside of the ball bearing for reducing the rotational frictional force is further provided, while the opening and the closed end are respectively formed on both sides, and a part of the inside diameter of the mounting hole inlet is extended to further reduce the rotational frictional force, A first discharge path through which a discharge flow of the oxygen gas introduced into the space provided by the recessed end through the first supply path is connected to the outside and a second discharge path is formed through the second supply path from a part of the inner circumferential surface of the binding hole, A second exhaust passage through which the discharge flow of the fuel gas introduced into the rim groove continues is further penetrated outwardly of the closed end, A third fitting tube portion communicating with the first discharge passage is formed by connecting another oxygen hose connected to the torch to the outer end of the first closed end, and another fuel hose further connected to the torch is connected to the second discharge passage, And a fourth fitting tube portion communicating with the second fitting portion is further protruded.

In addition, a plurality of hermetical packing are installed around the head portion at predetermined intervals so as to prevent gas leakage through a close contact portion between the manifold and the rotation cap.

As can be clearly understood from the above description, the rotary joint for the gas supply hose of the gas cutting machine of the present invention is constructed such that, when the hoses extending to the torch side are twisted while the hose is connected to the middle of the elongated hose, As a result, it is possible to prevent twisting and entangling of a plurality of hoses divided into two strands, thereby minimizing the cause of gas leakage through suppression of aging and damage of the hose.

In addition, it is possible to solve the problem of safety accident by reducing the overall efficiency of the hose due to the hose kinking and tangling and the hose rise from the ground, It is possible to prevent the occurrence of industrial disasters such as an explosion caused by the explosion, thereby eliminating the loss of tremendous human and material losses.

In addition, through the achievement of various effects described above, it is possible to provide an optimum working environment, and also to improve work efficiency and work efficiency by improving working environment such as showing convenience of equipment cleaning money after completion of work It is a very useful invention that can greatly contribute to the development and advancement of the construction industry in line with the diversification, speeding, and modernization of technologies according to the times.

FIG. 1 is a view showing the state of use of the oxygen cutter according to the prior art. FIG.
2 is a perspective view showing the structure of a rotary joint for a gas supply hose of a gas cutting machine according to the present invention;
3 is an exploded perspective view showing a configuration of a rotary joint for a gas supply hose of a gas cutting machine according to the present invention.
4 is a side sectional view showing the internal structure of a rotary joint for a gas supply hose of a gas cutting machine according to the present invention.
5a to 5c are exploded views of an embodiment of a rotary joint for a gas supply hose of a gas cutter according to the present invention.
6A and 6B are side cross-sectional and use views showing another example of a rotary joint for a gas supply hose of a gas cutter according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

FIG. 2 is a perspective view showing a structure of a rotary joint for a gas supply hose of a gas cutting machine according to the present invention, FIG. 3 is an exploded perspective view showing a constitutional relationship of a rotary joint for a gas supply hose according to the present invention, Fig. 4 is a side sectional view showing the internal structure of a rotary joint for a gas supply hose of a gas cutting machine according to the present invention, and Figs. 5A and 5B show an embodiment of a rotary joint for a gas supply hose according to the present invention Fig.

2 and 3, the rotary joint A for the gas supply hose of the gas cutter according to the present invention is characterized in that the oxygen hose and the fuel hose of each bomb are connected to the same one tip, A manifold (1) for connecting the fuel gas and the oxygen gas injected from the hose and the fuel hose to each other, an oxygen gas which has passed through the manifold (1) and another oxygen which supplies the fuel gas to the torch The hose and the fuel hose are connected to the other end of the same, while the opposite side is provided with a cylindrical rotary cap 2 for preventing the hose from being twisted in a 360 ° bidirectional free rotation in a state of surrounding a part of the manifold 1 It is composed of a link assembly.

The manifold 1 is an intermediate means for leading the flow of the oxygen gas and the fuel gas supplied from the oxygen cylinder and the fuel bomb, in which the oxygen gas is compressed and stored, respectively, to the torch side, as shown in FIG. 4 Likewise, the outer diameter of the side inserted into the rotatable cap 2 is enlarged to form the stepped head 1-1. This is for the purpose of maintaining the binding state of the head part 1-1 according to the side end of the ball bearing provided inside the rotary cap 2 to be described later and the stepwise mutual close contact.

In addition, a first supply passage 1a passing through the flow of oxygen gas is formed to penetrate across the longitudinal direction, and a recessed end portion 1a-1 communicating with the first supply passage 1a is formed in the head portion 1-1). This is for the purpose of providing a space for enabling gas (oxygen gas) circulation during assembly of the manifold 1 and the rotary cap 2 in association with each other.

Further, a second supply path (1b) for continuing the flow of the fuel gas is further formed inside along the longitudinal direction, and a rim groove (1b-1) communicating with the second supply path (1b) 1-1). This is for the purpose of providing a space for enabling the flow of gas (fuel gas) even in the rotation of the rotary cap 2 wrapped around the head part 1-1.

A first fitting tube portion 11 is formed at the opposite side of the head portion 1-1 so as to communicate with the first supply passage 1a by connecting an oxygen hose connected to the oxygen cylinder, And a second fitting tube portion 121 communicating with the second supply passage 1b by connecting the fuel hose connected to the cylinder is further extended at a predetermined length from the periphery.

A plurality of sealing packings 13 are provided around the head portion 1-1 at predetermined intervals to prevent gas leakage through the adhered portion between the manifold 1 and the rotary cap 2 .

Rotate cap 2 is a means for preventing the oxygen hose and the fuel hose from being twisted, connected to the torch side, together with discharge guidance of oxygen gas and fuel gas introduced into the manifold 1, respectively, The head portion 1-1 is inserted into the mounting hole 2a and has a mounting hole 2a in which the head portion 1-1 of the manifold 1 is fitted. The opening 2-1 and the closed end 2-2 are formed on both sides as the other side is closed.

It is also preferable that a part of the inner diameter of the inlet of the mounting hole 2a on the side of the opening 2-1 is expanded to further include a hole 2a-1 capable of accommodating the later-described ball bearing.

On the other hand, the discharge flow of the oxygen gas introduced into the space provided by the recessed end portion 1a-1 via the first supply passage 1a of the manifold 1 is formed in the closed end portion 2-2 The first discharge passage 2b is connected to the outer circumferential surface of the inner circumferential surface of the binding hole 2a-1. The first discharge passage 2b is connected to the outer circumferential surface of the inner circumferential surface of the binding hole 2a- A second discharge passage 2b for allowing the discharge flow of the fuel gas to continue is formed further through the outside of the closed end 2-2.

A third fitting tube portion 21 is formed at the outer end of the closed end portion 2-2 so as to communicate with the first discharge path 2b by connecting another oxygen hose connected to the torch. And a fourth fitting tube portion 22 connecting another fuel hose connected to the second exhaust passage 2c and communicating with the second exhaust passage 2c is additionally protruded.

The manifold 1 assembled with the rotation cap 2 is freely rotatable freely and the head portion 1-1 of the manifold 1 is detached and detached from the coupling hole 2a- And a snap ring 24 for interlocking the ball bearings 23 are coupled together.

6A and 6B are side sectional views and a state diagram showing another example of a rotary joint for a gas supply hose of a gas cutting machine according to the present invention, in which the structures of the manifold 1 and the rotation cap 2 are differently applied 6A, the configuration of the el arch 12 formed by extending a certain length from the circumferential surface of the opposite side of the manifold 1 inserted into the rotatable cap 2 is omitted While the first and second supply passages 1a and 1b are opened to the same side end of the manifold 1 as shown in Fig. 1, a nipple serving as a normal pipe fitting is used, So that the oxygen hose 831 and the gas supply hose 832 can be directly connected to the inlet of the two supply paths 1a and 1b.

This simplifies the shape and shape of the manifold 1, thereby shortening the production period of the rotary joint A for the gas supply hose of the gas cutting machine according to the present invention, And the like.

Hereinafter, the operation of the rotary joint A for gas supply hose of the gas cutting machine according to the present invention will be described in detail.

First, referring to Figs. 3 and 4, the head portion 1-1 of the manifold 1 is fully inserted into the mounting hole 2a through the opening 2-1 of the rotation cap 2. Fig. At this time, even if the tip end of the head part 1-1 is in close contact with the inner surface of the closed end 2-2 of the rotatable cap 2, the recessed end part 1a-1 of the tip end of the head part 1-1, The space between the first supply passage 1a of the manifold 1 and the first discharge passage 2b of the rotatable cap 2 is provided by being spaced from the inner surface of the closed end 2-2, Therefore, the flow of the oxygen gas flowing into the first supply passage 1a to the first discharge passage 2b can be continued.

The edge groove 1c around the head part 1-1 and the second discharge path 2c on the inner circumferential surface of the mounting hole 2a are arranged at the same position to communicate with each other, The flow of the fuel gas introduced into the second exhaust passage 2c can be continued.

A plurality of sealing packings 13 are previously provided around the head portion 1-1 so that the outer diameter of the manifold 1 and the inner diameter of the rotatable cap 2 are in close contact with each other The gas is prevented from leaking from the region where it is exposed.

Subsequently, the ball bearing 23 is fitted into the binding hole 2a-1 on the inlet side of the mounting hole 2a, and the step by the formation of the binding hole 2a-1 and the step by the head portion 1-1 So that one end of the ball bearing 23 is brought into close contact with the step formed by the ball bearing 23 and then the retaining ring 24 is fastened to the binding hole 2a- So that the ball bearing 23 is fixed by the snap ring 24.

According to this process, the free rotation of the rotary cap 2 is facilitated, and in addition, the assembled state of the manifold 1 and the rotary cap 2 is firmly established even with a frequently rotating operation.

Subsequently, according to the procedure described so far, the rotary joint A of the present invention composed of a single body is applied to the gas cutter 800 so as to prevent the hose kinks. As shown in FIG. 5A, The oxygen hose 831 of the cylinder 810 is connected to the first fitting tube portion 11 of the manifold 1 so as to communicate with the first supply passage 1a and the fuel gas is compressed and stored in the cylinder 810 ' The fuel hose 832 of the manifold 1 is connected to the second fitting tube portion 121 of the manifold 1 and is communicated with the second supply passage 1b.

Next, in the gas cutter 800, another oxygen hose 831 'connected to the torch 820 used as a cutting tool for various steel materials such as a steel plate or a steel pipe is attached to the outside of the closed end 2-2 Another fuel hose 832 'further connected to the torch 820 is connected to the third fitting tube 21 to communicate with the first discharge passage 2b and further protrudes outside the closed end 2-2 Finally, the gas cutter 800 having the rotary joint A according to the present invention is completed. The gas cutter 800 is connected to the fourth fitting tube portion 22 to communicate with the second discharge path 2c.

In this state, the operator performs the cutting operation of the steel using the gas cutter 800 as usual. As shown in FIGS. 5B and 5C, when the torch 820 is tilted sideways or the injection nozzle The oxygen hose 831 'and the fuel hose 832' connected to each other by the torch 820 may be twisted with each other. In this case, due to the torsional stress, 2 can be prevented from twisting the hose by rotating the manifold 1 in the opposite direction of the hose twist.

According to this operation, even if the position of the third fitting tube portion 21 of the rotary cap 2 is changed, the interspace provided by the recessed end portion 1a-1 of the head portion 1 - The oxygen gas introduced into the recessed end portion 1a-1 via the first supply passage 1a flows into the oxygen hose 831 'through the first discharge passage 2b, ) Can be supplied to the torch (820).

The second discharge passage 2c is also rotated along the edge groove 1c formed around the head portion 1-1 during rotation of the rotary cap 2 so that the second supply passage 1b The combustion gas introduced into the rim groove 1c can be supplied to the torch 820 after passing through the second discharge path 2c and into the other fuel hose 832 ' will be.

In summary, even if the torch 820 of the gas cutter 800 is manipulated to cut the steel material, the rotation cap 2 is allowed to rotate depending on the positions of the oxygen hose 831 'and the fuel hose 832' , The oxygen hose 831 'and the fuel hose 832' connected to the torch 820 can be prevented from being twisted, thereby enhancing the convenience of the operation. In addition, the gas hose 831 'and the fuel hose 832' It is possible to obtain a safety effect from an accident or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications may be made without departing from the scope and spirit of the invention.

A: Rotary joint, 1: Manifold, 1-1: Head part
1a: first supply path, 1a-1: depression end, 1b: second supply path
1b-1: rim groove, 2: rotation cap, 2-1: opening
2-2: closed end, 2a: mounting hole, 2a-1:
2b: first exhaust passage, 2c: second exhaust passage, 11: first fitting tube portion
12: El storage, 13: Seal packing, 21: Third fitting tube
22: fourth fitting tube portion, 23: ball bearing, 24: snap ring
121: second fitting tube

Claims (4)

A manifold in which each oxygen hose and fuel hose of each of the bombs is connected to the same one of the front ends, and the individual flow of the oxygen gas and fuel gas injected from the oxygen hose and the fuel hose is continued; And
The other oxygen hose supplying the oxygen gas and the fuel gas through the manifold to the torch and the fuel hose are connected to the other tip of the other side while the opposite side is provided with a 360 ° bidirectional free rotation in a state wrapped around a part of the manifold And a cylindrical rotary cap for preventing the hose from being twisted. The rotary joint for a gas supply hose of a gas cutting machine.
The method according to claim 1,
Wherein the manifold has a head portion having a stepped portion by expanding an outer diameter of a side portion inserted into the rotatable cap,
A first supply path is formed to pass through the flow of oxygen gas across the longitudinal direction,
A second supply path is formed in the inside along the longitudinal direction to separate the flow of the fuel gas,
Wherein a recessed end portion communicating with the first supply path is formed inwardly at the tip end of the head portion in order to provide a space for enabling the flow of gas when the rotatable cap is fitted into the rotatable cap,
A circumferential groove communicating with the second supply path is formed inwardly around the head portion so as to provide a space between the rotatable cap and the substrate,
A first fitting pipe portion communicating with the first supply path is connected to an oxygen hose connected to an oxygen cylinder and protrudes from a tip end of the oxygen hose and connected to the fuel hose connected to the fuel bomb, And a second fitting portion communicating with the first and second fitting portions is formed at a distal end of the elastics storing portion.
3. The method of claim 2,
Wherein the rotary cap has a cylindrical shape in which a mounting hole for fitting the head portion is provided,
The opening and the closed end are formed on both sides while one side is opened so as to surround the front end of the head portion inserted into the mounting hole while the other side is formed in a closed form,
Further comprising a bore hole for accommodating the inside of the ball bearing to expand a part of the inner diameter of the mounting hole inlet to reduce rotational friction,
Wherein the closed end is formed with a first discharge passage through which the discharge flow of the oxygen gas introduced into the interspace provided by the depressed end portion through the first supply passage is connected to the outside,
And a second discharge path through which the discharge flow of the fuel gas flowing into the edge groove through the second supply path is formed is further penetrated outside the closed end portion from a part of the inner peripheral surface of the binding hole,
A third fitting tube portion communicating with the first discharge passage is formed by connecting another oxygen hose connected to the torch to the outer end of the closed end portion and connected to another fuel hose further connected to the torch, And a fourth fitting tube portion communicating with the first fitting tube portion is further protruded from the first fitting tube portion.
The method according to claim 1,
Wherein a plurality of hermetically sealed packings are coupled to the head portion at predetermined intervals to prevent leakage of gas through a close contact portion between the manifold and the rotary cap.

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