JPH03254363A - Compact spear having device for preventing twist of said spear - Google Patents

Abstract

PURPOSE: To provide a compact lance attached with a protective device for twisting by disposing a bushing which is axially movable within the inner hole of a handle and is radially fixable between a collet chuck and a gasket sleeve. CONSTITUTION: The bushing 14 is inserted into the handle 4 and is properly fixed in the radial direction. As a result thereof, the inadvertent opening of the collet chuck 3 may be surely prevented when a tuyere 34 is twisted. The collet chuck 3 is also fixed by the bushing 14 radially fixed to the collet chuck 3. Even if, for example, the tuyere 34 turns, the tuyere can no longer be opened once the closure is achieved. Of course, the twisting of the tuyere 34 is prevented together. The reason thereof lies in that the tuyere 34 is correspondingly fixed in a static state to the handle 4. Consequently, the handle 4 is provided with the protective device against the twisting integrally therewith and, therefore, the corresponding unit may be made shorter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a compact spear for injecting oxygen during the combustion process, in which the tuyere introduced into the handle is fixed to prevent twisting. a closure for the collet chuck and an axial gasket in contact with the tuyere, partially surrounded by a gasket sleeve and compressible between the collet chuck and the protrusion of the inner bore, and an axial gasket for the tuyere; The present invention relates to a compact spear with a sleeve surrounding the end of the spear, in which case there is a quick-acting stop valve actuated by a control lever and a slug prevention device located in the handle.

PRIOR ART AND PROBLEM TO BE SOLVED Such compact spears are designed to have a combustible oxygen spear and/or tuyeres partially attached to the handle during the oxidation process to ensure that they are attached during handling. Used to connect to. Such tuyere holders are generally covered by German Utility Model No. 19.
39317 and German Patent Specification 2327595. With respect to these tuyere holders of the prior art, the handle consists of a housing with an inner hole, which housing has several steps so that it can support and act as a bearing for various inserts. has a department.

As can be seen from the above, the tuyere is introduced into the inner bore through the closure and the collet chuck, until the end of the tuyere is fitted into the sleeve, thereby allowing the slug arrester to be opened. When the closure is screwed in tightly, the collet chuck is compressed, thus holding the introduced tuyere in place. At the same time, this, 7
The torch is moved towards the end of the tuyere, whereby the gasket fitted in the gasket sleeve is correspondingly compressed. With this compressed gasket, there is a gas-tight connection between the end facing the oxygen hose and the end of the handle with the collet chuck and closure. Depending on the combustion process, straight or curved tuyeres are used. In the latter case, an undesirable load is placed on the tuyere, causing the collet chuck to rotate with it, which can easily lead to unintended slack in the tuyere, or to oxidation points at the curved end of the tube. becomes more difficult to reach.

German utility model No. 7508317 discloses a quick-acting stop valve that can be actuated by a prior art control lever. However, twisting of the collet chuck is not prevented.

The aim of the invention is to create a compact spear with protection against twisting, which is safe and secure in design and easy to operate.

SUMMARY OF THE INVENTION In order to achieve the above object, a compact spear according to the present invention is provided with a compact spear that is movable axially and radially within the inner bore of the handle between the collet chuck and the gasket sleeve. It is characterized in that a lockable bushing is provided, whereby the bushing acts on the collet chuck in a corresponding manner.

As a result of the bush being inserted into the handle and properly fixed in the radial direction, it is possible to reliably prevent unintentional opening of the collet chuck when the tuyere is twisted.

The collet chunk and radially fixed bushing are designed such that the collet chuck is also fixed with the radially fixed bushing. Even if the tuyere rotates, it cannot open once closure is achieved.

Of course, it is also possible to prevent the tuyere from twisting. This is because the tuyere is correspondingly fixed stationary on the handle. It is therefore advantageous that the corresponding unit t- can be shortened, since a protection against twisting is provided which is integrated into the handle.

In a suitable embodiment of the invention, the bushing is a slot.

and the handle has a radial bore, with the locating eagle engaging the slot.

As a result, the radial flexibility necessary for compressing the gasket is maintained and radial torsion is reliably prevented.

As mentioned above, secondary twisting of the current chunk and thus unintentional opening is also thereby prevented.

Precisely in this respect, the invention allows new improvements to be made to suitable tuyere holders without significant outlay, with the addition of corresponding radial holes not being of significant outlay and The bushing can be retrofitted into the inner hole of the holder or handle.

In order to prevent secondary twisting of the collet chuck when the tuyere is twisted, the bushing can be connected to the collet chuck, preferably by welding. Such an arrangement is particularly suitable for design changes, while for newly manufactured units it is appropriate to have the collet chuck and bushing in a single piece.

Due to the interposition of the bushing and aiming at a compact structure, it is specified according to the invention that the part of the handle holding the collet chuck has a male thread corresponding to the female thread of the closure body. It's advantageous. Thereby,
The closure is pushed along the handle when the tuyere is tightened or secured. This is because they both have corresponding teeth. Therefore, at the same time the pressure created by the fixation of the tuyere is exerted on the collet chuck.

This allows a completely closed housing, which is advantageous from the point of view of compactness and overall safety. This is because, in particular, additional parts such as threaded rods are no longer necessary.

When the tuyere is inserted into the inner hole of the handle, damage to the gasket is reliably prevented since the inner diameter of the bushing is designed to be the same diameter as the adjacent gasket. In this way, the tuyere is guided straight into the bushing, so that it can be easily introduced into the gasket. It will be understood that in this case suitable adjustments can be made to ensure insertion through the bushing.

Not only can a tuyere already centered through the bushing be easily introduced through the gasket, but if the sleeve holding the tuyere has a shoulder that fits into the tuyere and the sleeve portion extending further into the inner bore can accommodate a pressure-loaded valve. When designed as a tappet for mounting, at the same time it is precisely fixed at the end. Thereby, the tuyere, when introduced into the handle, automatically slides into the corresponding enlarged part of the sleeve with the shoulder, until the tuyere comes into contact with the front of the shoulder, so that it then If a pressure-loaded valve is connected, the pressure-loaded valve can be automatically pushed into place by appropriate displacement of the sleeve. On the other hand, it is advantageous to use suitably shaped shoulders to facilitate evacuation of the sleeve when the tuyere is removed.

In one arrangement of the invention, the return of the sleeve is achieved as a result of the shoulder of the sleeve being resiliently supported in the inner bore. When the pressure on the sleeve is removed, for example by removal of the tuyere, the sleeve is automatically pushed back to its original position, so that the sleeve is secured for repeated introduction of the tuyere. For fixation, movement of the tuyere is necessary, since by moving the closure it has to be pushed into the handle. The sleeve ensures that the tuyere can be displaced downwards.

A suitable elastic arrangement can be achieved by forming a helical spring on the outer wall of the sleeve part, which is supported by a projection in an inner bore. This threaded spring seals and achieves a correspondingly advantageous position of the sleeve in the inner bore of the handle.

Preferably, there is sufficient wall thickness to reliably support the set screw when the radial hole for the pilot screw is located near a relatively thick portion of the handle housing. From the point of view of You can also do it. This relatively thick part of the housing has the additional advantage that the tip of the set screw can be designed as a pivot over a suitable length, thereby achieving the longitudinal displacement capability of the bushing, yet preventing its radial rotation. It has many advantages.

To securely tighten the tuyere into the handle, the free end of the collet chuck is tapered to interact with the rounded edge of the sleeve with a radial extension, and the sleeve and closure are The contact may be made by intervening ball bearings. The ball bearings ensure that there is a similar and reliable transmission of the corresponding movement to the sleeve and via the sleeve to the collet chuck.

Shut-off valves, sintered metal discs and non-independent gas check valves as well as independent gas check valves and ergonomically shaped functions to improve ease of handling and increase safety. There is a special arrangement of gas and slug arresters in the form of levers and streamlined quick-acting stop valves.

The invention is very advantageous by integrating in a suitable manner a protection device against twisting, which also allows easy and safe operation of the tuyere holder, even when using curved or angled handles. Characterized by the availability of a compact handle. In addition to the compact construction, the arrangement according to the invention also makes it possible to reduce all the individual parts located in the handle to the minimum number necessary, so that a reduced inventory of spare parts can be maintained.

It must also be noted that the increased operational safety is a result of the compact embodiment of the tuyere holder.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

The tuyere holder 1 shown in FIG. 1 is shown in cross section. The functions of the individual parts are clearly indicated. First of all, at the end of the tuyere, which is not shown here, the tuyere holder has a closure 2 and a collet chuck 3 surrounded by it. Both are guided in the handle 4, the collet chuck being guided in such a way that it can be moved individually inside the internal bore 5 of the holder 4.

The sleeve 6 located on the closure 2 has an edge 7 corresponding to the taper 12 of the collet chuck 3 and acts on the collet chuck 3. The sleeve 6 can also be moved by twisting the closure 2, since the closure 2 acts directly on the extension 8 of the sleeve by means of ball bearings 9. There is a circlip 10 to ensure that the sleeve 6 can be moved together with the closure 2 during the release process.

When the collet chuck is twisted as described above, the sleeve 6 is forced onto the pointed end 12 of the collet chuck 3 as shown in FIG. First of all, the entire collet chuck 3 is then pushed in the longitudinal direction of the inner hole 5, and finally the end of the tuyere is fixed, as will be explained later. The elastic action of the collet chuck 3 is achieved by a suitable arrangement of the tapered tip and the adjacent parts, the collet chuck 3 having a ring-shaped shoulder 13 at its end.

The shoulder 13 is in contact with a bush 14 which is actually an extension of the collet chuck 3. The two are welded together as explained below. The shoulder 13 of the collet chuck 3 is in contact with the shoulder extension 15 of the bushing 14. The bushing 14 has a slot 16 into which a positioning screw 19 projects, so that the bushing 14
4 can be displaced in the longitudinal direction of the handle 4 together with the collet chuck 3. In this way, axial movement is guaranteed, but radial movement or twisting is prevented.

The positioning screw 19 is screwed into the corresponding radial hole F of the handle 4, with the positioning screw being screwed into its locator 2.
0 extends at right angles to the tuyere. Since the radial bore 17 is located near the thicker part of the housing 18, the necessary wall thickness is available to create a secure seat for the positioning screw 19.

Adjacent to the bushing 14 is a gasket sleeve 22 that partially surrounds the gasket 23.

When the tuyere holder 1 is moved in the longitudinal direction of the inner hole 5, the gas tube/nod sleeve 22 moves together with it.

Since the gasket 2β cannot be moved in the longitudinal direction, i.e. the gasket cannot be expanded, the gasket is correspondingly compressed in the lower part, so that the gasket is in a sealed state and thus the tuyere is closed as shown in FIG. sealing contact with the wall. Since the gasket 23 is tightened between the gasket sleeve 22 and the protrusion 24 during compression,
A gasket is caused to sealingly surround the tuyere.

Gasket 23 and bushing 14 suitably have corresponding inner diameters, so that bushing 14 serves at the same time as a guide for the gasket.

Adjacent to the gasket 23 there is an additional sleeve 25 which has a shoulder 26 adapted to the outer diameter of the tuyere.
Since the tuyere end portion 41 has an enlarged portion, the tuyere end portion 41 can be reliably introduced.

On both sides of the shoulder 26, the lower part of the sleeve 27 has a protrusion 29
Coil spring 28 to achieve constant elastic support on the
has. At the end of all handles 4 there is an external thread 30 for connecting it with an oxygen spear (not shown).

FIG. 1 shows that due to the proper arrangement of the inner bore 5, all the individual parts of the end facing the tuyere can be inserted into one piece of handle. In this way, a significant simplification is possible with a very compact construction.

FIG. 2 shows a steel vessel 32 into which an oxygen spear 33 can be introduced from below. A corresponding tuyere 34 is clamped onto the end of the tuyere holder 1 or the handle 4, and according to the illustrated arrangement, a reliable clamping is possible even if the tuyere 34 is curved (35).

It is advantageous if the tuyere holder l is designed according to FIG. 3, since tuyeres 34 of several conventional cross-sections can be used. Above all, even tuyeres of very small diameter can be tightened reliably. Otherwise, very small diameter tuyeres would tend to buckle easily when handled as shown in FIG.

FIG. 3 shows an enlarged view of the tuyere holder 1 shown in FIG. 1, in which the tuyere 34 has been introduced but not yet fixed in place. This figure shows a very compact design of the handle 4, with the closure body 2
protrudes beyond the uppermost part of the collet chuck 3 and handle 4. The displacement of the closure body 2 is effected by a suitable torsion movement, the handle 4 having a male tap 37;
The closure body 2 has a female thread 38 . Both necks 37.38
correspond to each other, so that when the closure 2 is twisted, it is automatically moved towards the lower end 36 of the handle 4. This movement of both parts 2.4 relative to each other causes a movement of the sleeve 6 inside the closure body 2 and, again via the closure body 2, of the collet chuck 3 towards the lower end 36. It will be done. Adjacent to the collet chuck 3 is a bushing 14 that moves back and forth in both directions with the collet chuck 3 because the two parts are connected to each other. The bushing 14 then acts on the gasket sleeve 22 and the gasket 24, which is now in contact with the outer wall of the tuyere 34 as a result of the corresponding compression. However, up to this point and slightly beyond, the sleeve 25 in the inner bore 5 holding the tuyere end 41 must also be moved axially, since the entire tuyere 34 is displaced with it. The presence of the slot 16 in the inner bore 5 allows the sleeve to carry out this movement in a problem-free manner.

When releasing the tuyere holder 1, the closing body 2 is twisted in the opposite direction, so that the closing body takes the collet chuck 3 with it, such that in the area of the transition the two parts essentially form a unit. rub against each other. Furthermore, the sleeve 25 is automatically retracted due to the placement of the coil spring 28, whereby the shoulder containing the entire sleeve 25 is pushed towards the upper end of the tuyere holder 1, i.e. pushed back. Thereby, other parts, including the collet chuck 3, can be moved rearward within the inner hole 5, or other parts can be pushed back automatically. This is because the sleeve 6 moves with the closure 2 with its sharp edges 7.

Since the bushing 14 and the collet chuck 3 are connected to each other by a weld 39, they both carry out joint movements and cannot be moved radially or bent.

FIG. 4 shows a general view of the compact spear, with the entire handle 4 shown in longitudinal section. The tuyeres 34 are shown only schematically. The tuyeres can be introduced from above into the closure 2 and through the collet chuck 3. By tightening the closure 2, the tuyere 34 is then tightened to the tuyere holder 1 as described above.

Inside the handle 4 there is a gas and slug arrester 43. By moving the sleeve 25 and thus the sleeve part 27, the sleeve end 44 with an opening 45 for the gas passage is acted upon, allowing gas to reach the shut-off valve 46. Suitably, the sleeve 25 and the shutoff valve disc 46 form a single unit. Suitably, the sleeve 25 and the shutoff valve 46 are a single component. The shut-off valve 46 is loaded by a spring 47, so that the tuyere 3
4 is not introduced, hermeticity is guaranteed.

If the tuyere 34 is introduced and therefore the shut-off valve 46 is lifted from its seat, gas will pass through the handle 4 if the necessary pressure is present and thus presses the gas check valve 49 with guide 50. can flow.

The sintered metal disk 48 is gas-permeable and allows the slag to further penetrate the handle in case of slag ingress or if this material has a similar undesirable effect on the sintered metal disk 48. 4 so that no one can pass through it. Therefore, the sintered metal disc has a spring of 47.47'
fixed or supported between In the guide 5o there is an opening 51 that ensures the passage of gas.

Before the gas can pass through the gas check valve 49 and thus the gas and slug arrest bag 243, the gas first passes through the quick-acting stop valve 6.
It must flow through 2. Rapid action stop valve 62
is opened by a control lever which is rotatable about a rotation axis 55 in a guide slot 54. After passing through the quick-acting stop valve 62, the gas can then flow to the rest of the handle 4 through an overflow passage 52, not shown in detail, so that finally the gas passes through the tuyere 34. can flow.

The grip 57 of the control lever 56 is ergonomically designed to ensure a secure hold.

When the control lever 56 is rotated, the operator's hand cannot slip into the vicinity of the lever guide 59 of the guide arm 60 because of the rounded cam 58 at the end.

As previously mentioned, the quick-acting stop valve 62 is connected to the control lever 56.
and is automatically closed again when the control lever 56 is released. For this purpose, the quick-acting stop valve 62 has a sealing pressure 63 from which the stop valve is lifted by a piston 64 which is connected to a guide bolted to the control lever 56 in the longitudinal direction of the handle 4. It is moved at the end by a bin 65.

An effective seal is provided by the gasket 66, in which case when the quick-acting stop valve 62 is lifted from the sealing pressure 63 against the force of the spring 69, the gas flows into an overflow passage (not shown here) parallel to the piston 64. 52 can flow.

On either side of the sealing pressure 63, the quick-acting stop valve 62 is streamlined so that below it adjoins a rounded flow extension 67 above the sealing pressure 63, and above it a flow cone runs at an acute angle. 68. The oxygen port 70 is enlarged, and a filter can be used if necessary.

For compact spear tuyere holders, especially for small diameter tuyeres, a compact and reliable holder can be achieved by providing a bushing between the collet chuck and the gasket sleeve. This bushing can be moved in the axial direction within the inner hole of the handle.
radially fixed, in particular in this fixed position
The bush acts on the collet chuck, ie holds it stationary. Twisting is prevented in particular by the slot in the bushing and the radial hole in the handle with the set screw. By turning the set screw downwards into the outer jacket of the tuyere, there is an advantageous connection and tightening of the tuyere within the tuyere holder. There is also a particularly secure gas and slug arrester in the handle and a streamlined quick-acting stop valve. The quick-closing valve is actuated by an ergonomically designed actuation lever.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of the tuyere holder, Figure 2 is a schematic diagram showing the steel vessel together with the tuyere, Figure 3 is a longitudinal sectional view of the tuyere holder with the tuyere installed, and Figure 4. is a longitudinal cross-sectional view of the entire compact spear. l...tuyere holder, 3...collet chuck, 4...
... Handle, 5 ... Inner hole, 14 ... Bush, 2
2... Gasket sleeve, 23... Axial gasket, 26... Sleeve, 34... Tuyere, 43...
- Gas and slag arrester, 56... control lever;
62... Rapid action stop valve

Claims (14)

[Claims] (1) A compact spear for injecting oxygen during the combustion process, with a collet chuck for fixing the tuyere introduced into the handle, in contact with the tuyere, and partially surrounded by a gasket sleeve. and an axial gasket that can be compressed between the collet chuck and the protrusion of the inner bore, and a sleeve that holds the end of the tuyere, the handle having a control lever and a gas and slug arrester. In a compact spear with a quick-acting stop valve that can be actuated by the device, between the collet chuck (3) and the gasket sleeve (22), it can be moved axially in the inner bore (5) of the handle (4). and a compact spear, characterized in that a radially fixable bush (14) is provided, whereby the bush acts in a corresponding manner on the collet chuck. (2) characterized in that the bushing (14) has a slot (16) and the handle (4) has a radial bore (17), with the positioning screw (19) engaging in the slot; 2. A compact spear according to claim 1. 3. Compact spear according to claim 1, characterized in that the bushing (14) is connected to the collet chuck (3), preferably by welding. (4) Compact spear according to claim 1, characterized in that the collet chuck (3) and the bushing (14) are designed as a single piece. (5) Handle (4) that holds the collet chuck (3)
2. Compact spear according to claim 1, characterized in that the part ) has an external thread (37) corresponding to the internal thread (38) of the closure (2). (6) The inner diameter of the bushing (14)
23) Compact spear according to claim 1, characterized in that it is designed to match the inner diameter of the spear. (7) The sleeve (26) holding the tuyere (34) has a shoulder (26) aligned with the tuyere and furthermore the sleeve portion (27) protruding into the inner hole (5) is configured to hold gas and slag. 2. Compact spear according to claim 1, characterized in that it is designed as a tappet for a subsequent pressure-loading valve that acts as a blocking device. (8) The shoulder (26) of the sleeve (25) is the inner hole (5)
8. Compact spear according to claim 1 or 7, characterized in that it is flexibly supported. 9. Compact spear according to claim 8, characterized in that on the outer wall of the sleeve part (27) there is a helical spring (28) which rests on the projection (29) in the inner bore (5). (10) Radial hole (1) for positioning screw (19)
Compact spear according to claim 2, characterized in that 7) is located in the vicinity of a relatively thick part of the housing (18) of the handle (4). (11) The collet chuck (3) is tapered at the exposed end and interacts with the rounded edge (7) of the sleeve (6), the sleeve having a radial extension. 2. Compact spear according to claim 1, characterized in that it has an extension (8) in which the closure body (2) is in contact with an intervening ball bearing (9). (12) The valve acting as a gas and slag arrester (43) is a spring-loaded check valve (46) connected to the sleeve part (27), which check valve is made of gas-permeable sintered a gas check valve (4) with a metal disc (48) and a guide (50) that closes independently of the control lever (56);
9) Compact spear according to claim 1 or 7, characterized in that it has: (13) A control lever (56) rotatable about a rotation axis (55) located on the handle (4) is slightly bent toward the handle and has a rounded end facing the lever guide (59). Compact spear according to claim 1, characterized in that it has a cam (58) with a cam (58). (14) Compact spear according to claim 1 or 13, characterized in that the quick-acting stop valve (62), which can be actuated by the lever (56), is streamlined on both sides of the pivot seat (63).