WO2022025535A1

WO2022025535A1 - Fixing holder for lance pipe

Info

Publication number: WO2022025535A1
Application number: PCT/KR2021/009554
Authority: WO
Inventors: 강의창
Original assignee: 주식회사 비비씨
Priority date: 2020-07-28
Filing date: 2021-07-23
Publication date: 2022-02-03
Also published as: KR102176953B1

Abstract

The present invention relates to a fixing holder holding a lance pipe in oxygen lance equipment for cutting. According to an embodiment, a fixing holder, which is provided at the front end of an oxygen lance for cutting and holds a rod-shaped lance pipe, comprises: a holder body having an installation hole penetrating through the front and back; a collet which is inserted into the installation hole and includes a block body having a non-circular cross-section behind a plurality of clamping jaws holding the lance pipe; a guide member which is installed in the installation hole and has an insertion hole of a cross-sectional shape corresponding to the cross-section of the block body so as to prevent the rotation of the collet; and a cap member which is screwed from the front of the holder body and tightens or untightens the plurality of clamping jaws according to the rotation direction.

Description

Fixed holder for lance pipe

The present invention relates to a fixing holder for holding a lance pipe among oxygen lance equipment for cutting used for cutting a large current or a ladle opening operation in a casting process of a steel mill.

Oxygen lance equipment for cutting uses the high-temperature combustion of a lance pipe that ejects oxygen to cut a large blade or to drill a hole in a clogged ladle.

High safety is required as it is used for steel that has just been solidified from liquid to solid by using the high temperature generated by melting the lance pipe due to the supplied oxygen.

The lance pipe is a consumable member and is fixed to a fixing holder provided at the front end of the lance equipment. lance pipe? Oxygen is supplied to the internal passage in the shape of a long rod, and the tip is heated to a sufficiently high temperature with a separate torch or the like for use.

Unlike a conventionally used straight lance pipe, a lance pipe having an L-shaped bend depending on the intended use is mounted on the fixing holder.

The portion where the lance pipe is bitten by the fixing holder has a circular cross section, and the weight of the lance pipe is considerable, so there is a risk that the L-shaped lance pipe may rotate due to gravity while the lance equipment is in use. In such a case, a large-scale human accident may occur.

An object of the present invention is to provide a fixing holder for a lance pipe in which safety is improved by fixing the lance pipe so that it does not rotate arbitrarily.

In addition, the detailed object of the present invention will be clearly grasped and understood by experts or researchers in the technical field through the detailed contents described below.

In order to solve the above problem, the present invention is provided in an embodiment at the tip of the oxygen lance for cutting, in the fixing holder for holding the rod-shaped lance pipe, the holder body having a mounting hole passing through the front and back, the mounting hole A collet having a block body of a non-circular cross-section behind the plurality of tightening jaws for holding the lance pipe, it is mounted in the mounting hole, and an insertion hole of a cross-sectional shape corresponding to the cross-section of the block body is provided. It provides a fixing holder for a lance pipe comprising a guide member preventing rotation of the collet and a cap member screwed from the front of the holder body, and tightening or releasing the plurality of tightening jaws according to the rotation direction.

Furthermore, a mounting member interposed between the tightening member and the block body to prevent the collet from being separated from the front of the mounting hole may be coupled to the mounting hole.

In addition, a cylindrical sealing member having a through hole through which the lance pipe passes is provided at the rear of the collet, and the sealing member is retracted by the cap member and the side portion is inflated as the collet is pressed by the inner circumferential surface of the mounting hole and the Oxygen leakage can be blocked by filling between the lance pipes.

According to an embodiment of the present invention, when a non-linear lance pipe such as an L-shaped lance pipe is gripped and used, work safety is greatly improved as the lance pipe does not rotate arbitrarily.

Other effects of the present invention will be clearly understood and understood by an expert or researcher in the art through the specific details described below, or during the course of carrying out the present invention.

1 is a perspective view of a lance holder equipped with a fixing holder according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the fixing holder according to the embodiment shown in FIG. 1 separated;

3 (a), (b) is a perspective view of the collet employed in the embodiment shown in Figure 1, (c), (d) is a perspective view of the guide member and the mounting member.

4 is an assembled cross-sectional view of the fixing holder according to the embodiment shown in FIG.

5 is a cross-sectional view showing an assembled state of the main part of the fixing holder according to another embodiment of the present invention.

6 (a) to (e) are views showing various embodiments of a non-circular block body of a collet and a guide member corresponding thereto.

Hereinafter, the configuration, function and operation of the fixing holder for a lance pipe according to the present invention will be described with reference to the accompanying drawings. However, throughout the drawings and embodiments, reference numbers for the same or similar components will be used uniformly.

The accompanying drawings show applied embodiments of the present invention, and the technical spirit of the present invention should not be construed as being limited through the accompanying drawings. If it can be interpreted that some or all of the drawings shown in the drawings are not necessarily the shape, shape, and order required for the implementation of the invention from the point of view of an expert in this technical field, this does not limit the invention described in the claims.

1 relates to an oxygen lance for cutting provided with a fixing holder according to an embodiment of the present invention.

The oxygen lance 200 includes a fixing holder 100 , a rod-shaped body 201 , and a switch member 202 .

A rod-shaped lance pipe (p) is mounted in front of the fixing holder (100). In the illustrated embodiment, the lance pipe (p) has an L-shape with a bent middle portion. Depending on the application, the lance pipe may be straight.

A rod-shaped body 201 and a switch member 202 are connected to the rear of the fixing holder 100 . The rear end of the switch member 202 is connected to a hose 204 for providing oxygen. As the user operates the lever 203 of the switch member 202 , oxygen is discharged to the front end of the lance pipe p through the switch member 202 , the body 201 , and the fixing holder 100 .

2 to 4 are related to a fixing holder according to an embodiment of the present invention.

The fixing holder 100 according to an embodiment of the present invention uses the collet 20 as a means for separably holding a long lance pipe of a circular cross section.

Accordingly, the fixing holder 100 includes a holder body 10 , a collet 20 , a guide member 30 and a cap member 40 . Additional components that can be omitted include a mounting member 50 , a sealing member 60 , a sealing cap 62 , a support ring 70 , and an elastic support part 80 .

A mounting hole 11 into which the collet 20 is inserted is formed in the holder body 10 . The mounting hole passes through the front and rear of the holder body, and the inner circumferential surface has steps whose inner diameter decreases from front to rear in several steps.

The elastic support part 80, the support ring 70, the sealing member 60, the sealing cap 62, the guide member 30, the collet 20, and the mounting member 50 are sequentially inserted into the mounting hole 11. . A thread is formed on the inner circumferential surface of the portion into which the guide member 30 or the mounting member 50 is inserted.

The elastic support part 80 includes a sliding member 81 and a spring 82 . The sliding member 81 has a cup 811 that is opened upward to accommodate the end of the lance pipe, and a cylindrical body 812 on which a spring 82 is mounted on an outer circumferential surface of the cup 812 as a lower portion of the cup. In addition, a hole through which oxygen passes through the center of the sliding member 81 vertically is formed.

A hole through which the lance pipe passes is formed in the center of the support ring 70 , and is inserted into the mounting hole 11 and elastically supported by the upper end of the sliding member 81 .

The sealing member 60 has a cylindrical shape in which the through hole 61 through which the lance pipe p passes is opened up and down, and is made of a synthetic resin material that can be elastically deformed. The sealing cap 62 has a shape that partially surrounds the upper end surface and the outer peripheral surface of the sealing member 60 , and a hole corresponding to the through hole 61 is formed.

Meanwhile, the guide member 30 is mounted on the sealing cap 62 . At this time, the screw thread 31 is formed on the outer circumferential surface of the guide member 30 , and is screwed to the inner circumferential surface of the mounting hole 11 . An insertion hole 32 is formed in the guide member 30 , and the cross-sectional shape of the insertion hole 32 corresponds to the cross-sectional shape of the block body 23 of the collet 20 to be described later.

In the collet 20, an engagement hole 21 for accommodating the outer peripheral surface of the lance pipe is formed to pass through the front and rear. A plurality of tightening jaws 22 for gripping the lance pipe are provided at the front end of the collet 20 , and a block body 23 having a non-circular cross section is provided at the rear of the tightening jaws 22 .

Each tightening member 22 includes an elastic piece 221 extending forward from the block body, and a wedge-shaped engaging piece 222 formed in front of the elastic piece 221 and having a gentle inclined surface 223 . The outer diameter of the elastic piece 221 portion connecting the block body 23 and the engaging piece 222 is relatively small, and the middle portion of the collet 20 is concave compared to the upper and lower portions.

2 to 3, the cross section of the block body 23 is approximately hexagonal. The cross section of the insertion hole 32 of the guide member 30 is also formed in a hexagonal shape to accommodate the block body 23 .

In this case, the cross-sectional size of the insertion hole 32 may be slightly larger than the cross-sectional size of the block body 23 . That is, as the block body 23 enters the insertion hole 32 , the collet 20 does not rotate, but it can be made to the extent that it enters somewhat loosely and wobbles.

In addition, the height of the guide member 30 may be slightly larger than the height of the block body 23 . Accordingly, when the collet 20 is released to separate the lance pipe p, the elastic support 80 slightly lifts the lance pipe p and the collet 20 so that the separation of the lance pipe p is made easy. can

The guide member 30 is screwed with the inner circumferential surface of the mounting hole 11 to couple the guide member 30 to the holder body 10, and then the block body 23 of the collet 20 is fitted to the insertion hole 32 and mounted. can do.

The mounting member 50 is to prevent the collet 20 from leaving the front of the mounting hole 11, and is coupled to the mounting hole 11 later than the collet 20, or the collet 20 and the mounting member 50 ) can be combined first and then assembled into the mounting hole 11 .

A screw thread 53 for screwing the mounting hole 11 is formed on the outer circumferential surface of the mounting member 50, and a protruding peripheral portion 51 protruding toward the periphery of the concave middle portion of the collet 20 is formed on the inner circumferential surface. . Referring to (d) of Figure 3, a recess 511 is formed on the inner circumferential surface of the protruding peripheral portion 51, and a stop ring 52 is mounted in the recess 511.

Referring to FIG. 4 , the stop ring 52 further reduces the inner diameter of the protruding peripheral portion 51 , so that the collet 20 comes into contact with the front end of the block body 23 so that the collet 20 does not fall out to the front of the mounting hole 11 . will not

In another embodiment, according to the cross-sectional size of the block body 23, the lower end of the mounting member 50 may contact one end of the block body 23 so that the collet 20 does not fall out. In this regard, FIG. 5 shows a collet 20, a guide member 30, and a mounting member 50 according to another embodiment.

In the drawing, the upper and lower length of the guide member 30 is longer than that of the block body to secure a space for the collet 20 to move up and down.

Referring to the cross section along the line BB of the drawing, the inner diameter w of the protruding peripheral portion 51 is formed smaller than the maximum diameter d of the block body 23, so even if the collet 20 is lifted upward, the block A portion of the sieve 23 interferes with the protruding peripheral portion 51 so that the collet 20 does not fall out of the mounting hole.

Referring back to FIGS. 2 to 4 , the cap member 40 is screwed to the outer circumferential surface of the holder body 10 from the front. An entry hole 41 is formed in the cap member 40 to guide the lance pipe p to enter straight into the engaging hole 21 of the collet 20 .

In addition, as the cap member rotates, a pressing part 42 is mounted inside the cap member 40 to press the inclined surface of the biting piece to tighten the tightening jaws. Accordingly, according to the rotation direction of the cap member 40, the lance pipe may be fixed with the plurality of tightening jaws 22 or the tightening thereof may be released.

Meanwhile, FIG. 6 is an example of a combination of a collet and a guide member employed in a fixing holder according to another embodiment.

6 (a), the cross section of the block body 23 of the collet 20 is octagonal, and correspondingly, the insertion hole 32 of the guide member 30 is also formed in an octagonal cross section. In addition, the cross-section of the block body and the cross-section of the insertion hole of the guide member may be changed into various polygons such as pentagons and decagons.

6 (b) and (c), the cross section of the block body 23 and the cross section of the insertion hole 32 of the guide member 30 are formed in a non-circular shape by removing a part from the circle. Depending on the number of incisions, it may have a substantially rectangular cross-section as in (b) or a cross-sectional shape with two parallel sides as in (c). Also, in another embodiment, there may be one or more sections in which a part of a circle is cut into a curve that is not a part of a straight line or a circular arc.

On the other hand, (d) and (e) of Figure 6 (d) and forming the concave-convex projection 231 and the groove 33 along the outer peripheral surface of the circular cross section, the cross section of the block body 23 and the insertion hole 32 in a non-circular shape did it Here, the protrusion may be formed in the block body and the concave groove may be formed in the insertion hole, or conversely, the concave groove may be formed in the block body and the protrusion may be formed in the insertion hole. In addition, in implementing the protruding concave-convex protrusion 231, a screw bolt may be used. In addition, in another embodiment, the number and spacing of the projections and grooves may be variously changed.

In addition to the examples shown in FIGS. 3, 5 and 6 (a) to (e), various methods of suppressing the rotation of the collet by making the cross-section of the block body and the cross-section of the insertion hole of the corresponding shape non-circular This can be applied.

Referring to FIGS. 1 to 4 , an action relationship of gripping the lance pipe will be examined.

When the lance pipe (p) is inserted into the fixing holder (100), the engagement hole (21) of the collet (20) with the tightening jaw (22) apart, the through hole (61) of the sealing member (60), and the support ring (70) ) through the hole, the end of the pipe comes into contact with the bottom of the cup 811 of the sliding member 81.

As the cap member 40 is tightened, the collet 20 is pressed and descended, the spring 82 of the elastic support part 80 is pressed, and the sealing member 60 is also elastically deformed to inflate left and right by pressing the collet 20 from above. . The pressed sealing member 60 fills the space between the inner circumferential surface of the mounting hole 11 and the lance pipe (p), and oxygen that enters through the hole of the elastic support part flows only into the lance pipe (p) and does not leak out of the fixing holder .

Meanwhile, the cap member 40 tightens the tightening jaw 22 of the collet 20 so that the lance pipe p is firmly engaged and fixed to the collet 20 .

The guide member 30 is screwed to the mounting hole 11 and is in a fixed state. Furthermore, as the mounting member 50 is tightly tightened, the guide member 30 is also more firmly fixed to the holder body 10 .

By positioning the block body 23 in the insertion hole 32 of the guide member 30, as shown in FIG. 1, even if a force to rotate the L-shaped lance pipe p in one direction is generated by gravity, the block body is a guide member is interfered with so that the collet 20 and the lance pipe p do not rotate arbitrarily.

Thereby, the user can reduce concerns about safety accidents that occur when the lance pipe rotates arbitrarily when handling the oxygen lance for cutting.

Claims

In the fixing holder provided at the front end of the oxygen lance for cutting to hold the rod-shaped lance pipe,

A holder body having a mounting hole passing through the front and rear;

A collet inserted into the mounting hole and provided with a plurality of tightening jaws for gripping the lance pipe, and a block body having a non-circular cross section to the rear of the tightening jaws;

A guide member mounted on the mounting hole and provided with an insertion hole having a cross-sectional shape corresponding to the cross-section of the block body to allow forward and backward movement of the collet while preventing rotation of the collet;

After the guide member and the collet are mounted, it is mounted on the mounting hole, and is interposed between the tightening member and the block body to fix the guide member while preventing the collet from being separated from the front of the mounting hole. And

It is screwed from the front of the holder body, comprising a cap member for tightening or releasing the tightening of the plurality of tightening jaws according to the rotation direction

Fixed holder for lance pipe.
In claim 1,

A cylindrical sealing member having a through hole through which the lance pipe passes is provided at the rear of the collet,

The sealing member is a fixing holder for a lance pipe, characterized in that the collet is retracted by the cap member and the side portion is inflated as it is pressed, filling the space between the inner circumferential surface of the mounting hole and the lance pipe and blocking oxygen leakage.