HU182149B - Gas burner particularly for economic heating products forming product line translating continuously - Google Patents

Abstract

Die Erfindung betrifft einen Gasbrenner, insbesondere zur wirtschaftlichen Erhitzung und oder zur Schmelzbearbeitung und/oder Wärmebehandlung von in Form einer Produktenreihe vorzugsweise kontinuierlich fortbewegten Gegenständen, mit einem brennbaren Gasgemisch.

Um ohne Unterbrechungen in der Wärmezufuhr zu erwärmen und in den zwischen den vereinzelten Produkten vorhandenen Lücken keine als Verlust und als überschüssige Hitzebelastung geltende Flammen aufrechtzuerhalten, wird mindestens ein nach bestimmten Öffnungen oder Öffnungsgruppen des Strömungswegsystems hin gemäß vorgeschriebenem Programm freie Durchströmungsquerschnitte gesteuert freigebendes ventilartiges Organ zwischen dem Anschlußstutzen und dem Gasgemisch-Austrittseiement, insbesondere einem Einsatzstück im Brennergehäuse eingesetzt.

Description

BACKGROUND OF THE INVENTION The present invention relates to the economical heating of gas-burning products forming a series of moving, in particular continuous moving products. melting-machining, tempering, etc. a burner housing having at least one connection element for heating a combustible gas mixture and a gas exit member having a bore and / or superimposed passage system adapted to form the desired chain image.

In large-scale mass production equipment using gas flame machining technology, the products to be processed generally pass through the machining ranges in the form of a moving product line. The product units forming the product line are located at defined intervals on a driven conveyor. In newer machine designs for performance enhancement, product passage is very often continuous and continuous, and the passage of the product passage is generally closed and may include both straight and curved sections. It is often a requirement of the heating operation that the continuous motion products are heated as far as possible without interruption. To this end, the following gas burner arrangement solutions are currently known and widely practiced.

Known wavy burners, which periodically follow the flanks, whose flame during the follow-up period is only directed at the product. However, during periodic retraction, the product cools down and the burners burn unused, synchronizing the follow-up movement and forward movement, and the swinging masses can cause dynamic difficulties that increase rapidly with increasing speed.

It is a common known solution to use proper hedge burners along the product decay stage, whose flame series form a more or less coherent flame curtain. Since the products always follow each other at intervals, the energy consumption is usually several times the theoretical amount required. However, hedge flames often reach beyond the desirable ranges, which is also important for machining technology. Excessive power supply increases the heat load of the machine equipment, and the associated environmental damage is significant.

The already mentioned swinging little ore movement. A known solution to the special case of burner designs is that the appropriate drive elements formed on the transport conveyor pull the movable, swinging bed burners along certain sections and then return to the next product. Alternative follow-up motion can be rotary or advanced. The disadvantages of this solution are the same as the ones mentioned above, especially in terms of dynamic stress. Temporary dragging of the burners will periodically vary the load on the product transfer device, and the burners may interfere with each other in the swinging motion. Establishing and maintaining a towing mechanical connection can be difficult, it is highly structured, and the likelihood of breakdowns or malfunctions is high.

Finally, the known solution is to use gas burners traveling with the product. A solution that is rarely used in rotary machines. However, feeding the burners with a gas mixture, especially at least in part with linear, chained machines, presents structural and safety problems, and the constant presence of the burners

-2182.149 is also difficult to accomplish during the operation.

It is an object of the present invention to provide an economical and technologically advantageous heater for products consisting of a series of products arranged alongside each other, mainly in continuous moving motion, which is capable of continuously heating the products without interrupting the product range. and the need to maintain flames that cause unnecessary heat load and excess energy consumption.

The invention is based on the discovery that the object sought is essentially achieved by using correct hedge burners which are permanently closed to useless, redundant exit cross sections according to the product price synchronized program, and are always only identical to the products to be heated, line burners to expel the combustible gas mixture.

Accordingly, the present invention provides an object gas burner having a free gas flow in the burner housing between the gas supply connection member and the passage of the gas outlet flame generator to the outlet or outlet groups of the latter. at least one closure-opening member for program-controlled cross-sections.

As a closing-opening device, it has proved to be very suitable to use a cylinder having a screw groove of one or more portions arranged in a rotating and outwardly hermetically sealed manner on its periphery. The cylinder rotation may be effected by rigid kinematic coupling of the cylinder bearing output shaft to a rotary drive unit synchronized with the product flow rate and phase position. Several gas burner drive shafts of the present invention, which form a series of burners, may also be coupled to each other by clutches, which may be angled to one another. From different points of view; e.g.' retrofitting, decomposability, program agility, etc. it may be advantageous to design and use a single electric motor, especially a pulsed gas cylindrical gas burner driven by a stepper motor.

The gas burners of the present invention may also be configured so that the program-controlled closing and opening member is at least certain / collecting / passages in the passage system of the gas exit member. the valves are preferably assembled in front of them, preferably in the form of solenoid-operated valves. with a permanent magnet lost together with the transport unit. solenoid valve ball valves, or eg. special valves controlled by electromagnetic pulse control and having one-side spring-loaded tongues as closures.

The gas burners of the present invention provide a burner corner that is well adapted to the flow path of the product and is able to follow both curved and straight sections. The program control of the burners is well synchronized for any machining task and allows the use of the most advanced electronic tools. The biggest advantage of a gas burner is its very energy efficient use, which is accompanied by significant technological advantages.

The invention will be described in more detail with reference to exemplary embodiments, based on the accompanying drawings. In the drawing it is

182 149

Figure 1 is a schematic sectional view of an exemplary embodiment of a gas burner according to the invention with a continuous shaft, externally driven,

Figure 2 is a sectional view taken along section II - II of the gas burner of Figure 1,

Figure 5 is a sectional view of another exemplary gas burner according to the invention, a

Figure 4 is a sectional view taken along line IV-IV in Figure 3 ·,

5 · shows a current-time diagram showing the control pulses of an exemplary gas burner in Figures 3 * and 4,

Fig. 6 shows an exemplary embodiment of an additional shut-off valve with ball valve. sectional diagram of a gas burner according to the invention, a

Fig. 7 is a sectional view of an exemplary gas burner with electromagnetic pulse-controlled tongue closure opening;

Fig. 8 is a sectional view taken along the line VIII-VIII of Fig. 7, a

9 · by way of example in Figures 7 · and 8! a current-time diagram showing the control pulses of the gas burner of the present invention.

Figures 1 and 2 illustrate an exemplary gas burner 1 with a bore F of a burner housing 2 for forming a more or less discrete flame L of flames L moving in the direction of arrow A and having a series of boreholes. The latter contact the coupling 5 for introducing the combustible gas mixture through the worm grooves 4 in the circumferential surface of the cylinder 5 which influences the internal gas flow as a shut-off element, when they are in the cover position. The groove-free areas of the cylinder 5 provide a sufficient degree of gas tightness, so that the gas supply to the holes E, which are not overlapping with the screw grooves 4, is practically interrupted. It will be appreciated that when the cylinder 3 is rotated, the combustion flames of the gas mixture that is being discharged run along a series of bore holes in the burner insert at a rate of apparent traveling speed. The 4 worm grooves and / or the width of the worm grooves? The number, pitch, pitch and pitch of the burner 1 can be varied within a very wide range in accordance with the flame pattern, flame width and rotational velocity, and can be adapted to the shape and pitch of the product line to be machined. It can be seen in Figure 1 that e.g. is the desired length of 6 axes of the desired length passed through all of them at any end? gas respectively. The gas burner of the present invention, individually adjustable in terms of flame intensity, may be arranged in a threaded manner. The shaft 6 is supported by roller bearings 7, respectively, which are arranged in shield bearing blocks 8 fixed on a correct support rod 9. The sky 2 is the axis of the 6 axes. limited rotation around this coaxial cylinder 3? can be locked in the desired position by means of fixing screws 10 with 11 fixing screws. The cylinder 3 is in or out of an off-axis phase position 6. and adjustability

-4182.149 the coil actuating drive connection of the cylinder 5 is provided by a driving sleeve 12 which can be secured to the shaft by a screw 13. The gas-tight opening 15 on the burner 2 facilitates the control and adjustment of the phase position. For reasons of thermal expansion, a groove is provided in the cylinder 3 for the worm screw 13. The bearings 8 and the cylindrical face (s) 3 have seals 14 capable of absorbing heat expansion. In the case of several adjacent groups of gas burners of the above type, the individual gas passages are sufficiently separated from each other and from the outside world. Flame control is possible either by turning the burner housing 2 and / or the burner insert 1. The flame spacing and width can be varied by replacing the cylinder 3 by pulling the shaft 6 out of the bearing brackets 8 after loosening the screws 13. The burners can then be removed and the parts replaced. The bearing of the shaft 6 and the fine positioning of the burner housing 2 allow the friction between the cylinder 3 and the burner housing 2 to be adjusted so as to be wear-free. However, the structural material of the cylinder 3 can be any soft carbon. In the case of longer burner rows formed of common burners mounted on common axes 6 extending through both ends, bearing bearings 8 slightly reduce the homogeneity and useful length of the burner row, but with a slightly fan-shaped bore, homogeneous heating can be achieved. By properly designing the passage system of the burner inserts 1, a lighter or analogue lighter analogue to a known burner is known. a continuous flame / auxiliary flame / advanced flame can also be realized, where the auxiliary flame (s) passes with the main flame L. If the heating or advancing path of the products to be heated is curved, e.g. guided along a circular arc, the gas burners of the present invention may be formed by coupling elements allowing an angle-locking drive, e.g. and burner rows of short straight sections with 6 shafts connected by universal joints. It will be appreciated that the gas burners of the present invention and their convertible burner lines formed from such assemblies may be regarded as substantially correct hedge burners, which are continuously closed or redundant in certain areas which are not useful for product heating. always only open the burner holes which are opposite the products to be heated to expel the burning gas mixture. The gas stream flowing out of any bore or stream group can be ignited by the previous one - and even by ego fire. Thus, it is possible to detect the apparently moving products to be heated and heated from the holes in the duct system of the stationary lantern, and only the flame tongues thereafter which appear at the origin of the lantern and change according to a predetermined configuration. at the end of the burner line. Starting the flame requires at least one continuously burning ground flame at the starting point, but the use of a constant weak hedge flame burning along the entire length of the skyline is even economical and can be a safety measure. This also increases the flame stability.

The spindle roller 111 of the exemplary gas burner according to the invention described above can be rotated by a rotary drive unit connected to a shaft 6, the motion characteristics of which, in particular its speed, are synchronized with the speed of the thermocouple.

-5182.149

From a functional point of view, substantially the same drive mode and associated structural design, but different exemplary embodiments are shown in Figures 3-5. In this case, the single or multi-threaded helical groove 3, which is also used as a closing and opening member, has, for example, a separate electric drive of a stepper motor. The roller 3, which is freely rotated on the shaft 6, is made of roller bearings 7 and consists of antimagnetic structural material and has three soft-toothed discs of soft magnetic material in defined sections along the axis of rotation. The discs 16 are phase-displaced with one-third tooth pitch relative to one another. The burner housing 2 is also of antimagnetic construction and has a gas-tight, soft-toothed, internal toothed motor stator 17 in the regions covered by the discs 16, having the same tooth pitch as the discs 16. Each motor stator 17 is provided with one winding 18. In Fig. 4, each motor stator 17 is distinguished in sequence by reference numerals 17a, 17b, 17c, and their coils 18 are excited by current pulses I in the diagram of Fig. 5 5, respectively. The cylinder 3, in accordance with the principle of operation of the stepper motors, rotates synchronously with the current pulses, as the respective toothed wheels 16 are always rotated with the teeth of the notor stator 17 / the shortest rotation / covering. The cylinder 3 is thus rotated to ₀ periodically / kvázlfolyamatosan / Tokosztással one third. The scalp of the serrated discs 16 is formed by the diameter of the cylinder 3, so that the interdental spaces form closed spaces and do not interfere with the process of opening and closing. Incidentally, the tooth gaps do not interfere with the gas-flow closing-opening process. The three-phase power supply according to Fig. 5 · e.g. the transmitting agency, eg. can be controlled from the encoder mounted on the camshaft of the assembly machine to ensure synchronous operation of the flame and the products. Such electrically driven gas burners of the present invention may also form a series of burners, which in turn may be more easily and easily adapted during operation than in the embodiments shown in Figures 1 and 2 and subsequently adapted to machining machines without the need for mechanical actuators.

Other embodiments of the gas burner of the present invention, other than those described above, may be provided such that, as a program-controlled closure and opening member, at least a plurality of exit holes are provided in the passage system of the gas exit member. Preferably, solenoid-controlled valves are incorporated into the arrows that feed the arrow. An exemplary solution is shown in Figure 6. The holes of the burner housing 1 with burner housing 1 and 5 caps with lower block 2a and cover 2b are simply closed by means of 19 ball-type non-return valves which are kept closed by the pressure of the normal-intensity gas stream. Below the base block 2a, a permanent magnet M is generated which generates a magnet acting on the steel balls 19, which, by pulling the steel balls 19 into its force field, releases the corresponding gas holes, respectively. It is easy to see that the product or product. moving synchronously with a product line, e.g. mounted on or transported with the product transport device, eg. The magnets M attached to the endless chain * strap can produce a traveling flame synchronously in accordance with the present invention. The width of the traveling flame tongues is determined by the width of the magnets M applied, since the steel balls 19, which leave the magnetic field, are raised again by the gas stream.

-6182.149

A further example of a solenoid-operated organic gas burner according to the present invention comprising a series of magnetically controlled individual valves! 7 to 9 illustrate an embodiment of the invention. The design is electromagnetic, pulse-driven. The tongue 20, which is connected to a soft magnetic block 22, is used for intermittent sealing of the main holes feeding the passage system of the burner insert 1 of a cover 2b and a base block 2a. This mounting mode allows the tongues 20 to be folded independently into the opening position, illustrated in Figure 7 by a thin line. In a magnetically excited state with a common excitation coil 26, the displaced tongue is formed by providing a special pole for the array 22/111. / keep tongues open despite the rebound force of the disc comb 21. The tongues 20 are provided with spring tongues 2J, respectively, which mechanically engage the tongue 20, which is pivoted in an open position and magnetically fixed therein, to its adjacent tongue in the direction of the flame. At the moment of the excitation / de-energization of the excitation coil 28, the tongues 20 so mechanically connected to each other perform opposite movement. The tip over! After completing half of the journey, another excitation pulse follows, which ensures that the moving elements, even though the tongue 20 is already tensioning towards the open tongue 25 tongue of the next tongue, are moving toward their opposite state of starting position. A properly selected pause of excitation for the duration of t (see Fig. 9) tilts the tongue 20 in its open position to its closed position, while the other tongues 20 remain immobile. It follows from the above that the pulsed periodic excitation of the excitation produces a seemingly continuous moving motion image.

The process is initiated by opening the first 20 tongues in the queue with an extremely high current pulse I as shown in Fig. 9. Namely, the pole surface acting on the first tongue 20 in a row is formed asymmetrically with an insert 25 of antimagnetic material, i.e. the pre-tensioning of the tongue combs holding the first tongue 20 in this order resists the force of magnetic fields generated by normal current pulses. Therefore, in the case of excitations with normal I current pulses, this first or second impulse is applied. the 20 tongues assigned to each pole made asymmetric r.subject will remain dormant and closed. However, the opening force generated by the starting current pulse I is greater the movement! with a limiting force, such a trigger pulse can always trigger another traveling flame tongue. The larger L · Pulse does not interfere with the closing and opening process, which has been initiated earlier and is spreading as described above, so that the progressive flame tongues can follow each other with any frequency, number and division of the burner bore. 111. The excitation pulses are, of course, synchronized with the product flow. The base block 2a of the exemplary gas burner according to the invention described is correctly fixed, and several structural members are easily and quickly replaced. The base block 2a and the cover 2b consist of antimagnetic construction material, the magnet being open. The burner 1 et / 8. / ribbed, split with burner bore · same, in the resulting split passages the igniter-7-

182,149 A gas mixture which feeds on flames, the main flame always comes out of the igniting and holding flame that goes along with it.

By means of multiple parallel alignment of a plurality of short straight or even curved burner sections of the above gas burner according to the present invention, any tracked product conveyance path can be traced. The flame tongues can follow one another / in larger divisions than one. Λ the tracking program, ie the flame spread, the frequency and the phase position relative to the products can be electronically controlled by selecting the phase positions of the starting pulses. adjustable. If, for example, a wide section should be heated, for example at a fixed location and for a period of time. it is possible to use a program in which every second excitation pulse is triggered, thus producing a / wide / lang tongue in which every second bore burns.

The gas burner according to the invention can be significantly miniaturized, easily retrofitted, replaced and adjusted.

Claims (12)

Patent claims 1. Gas burner for economical heating of moving, especially continuous moving, product line products, melting, tempering, etc. a combustion chamber having at least one connection element for introducing a combustible gas mixture and a gas exit member having a gas exit member adapted to form the desired desired flame pattern, characterized in that the connector member / 5 / and the gas member, in particular, at least one closure-opening means arranged for the program-controlled creation of free gas flow cross-sections arranged between the burner (1) passage system and a defined outlet of the passage system or groups of outlet openings. Gas burner according to Claim 1, characterized in that its closing-opening member is a cylinder (2) arranged in a rotatable and outwardly hermetically sealed manner (3) having a single or multi-section worm groove (4) on its peripheral surface. . Gas burner according to Claim 2, characterized in that the shaft-bearing bearing brackets / 8 / mounted on the shield bearing brackets closing the ends of the burner housing / 2 / are mounted on at least one end of the shaft / 6 / which is rotatable with the latter. affixed:. The gas burner according to claim 3, characterized in that a drive unit for rotating movement of the shaft / 6 / is connected to the end of the shaft / 6 / from the burner gas / 2 /. Gas burner according to Claim 3 or 4, characterized in that it is a burner line comprising a plurality of cylinders (3) threaded to a common shaft (6) passing through the shield bearing brackets (8) at both ends. Gas burner according to Claim 3 or 4, characterized in that the coupling terminated through each of the ends through the shield bearing brackets / 8 / It is designed as a burner row consisting of 182.149 elements connected by shafts / 6 / arranged cylinders /? / And burner housings / 2 /. 7. Gas burner according to claim 2, characterized in that the at least one cylinder section of the slot groove / 4 / cylinder / 5 / is formed as an electric motor rotor and in the region of the housing / 2 / associated with this cylinder section. stator / 17 / is arranged. 8. Gas burner according to claim 7, characterized in that there are preferably three soft-circumferential toothed disc discs (16) arranged in antimagnetic structure material on a shaft (6) freely mounted on the shaft (5) and arranged at intervals. with a third tooth pitch, are offset in phase, * and in the slits of the burner housing / 2 / also of antimagnetic construction material, / 16 / one of the same tooth pitch internal magnetic soft stator motor 17 is inserted in a gas-tight impulse have rolls / 18 /. 9. The gas burner according to claim 1, characterized in that its closing-opening member is formed as a set of preferably solenoid valves integrated in at least some of the passages of the passage system of the gas exit member. 10. The gas burner according to claim 9, characterized in that it preferably has a closing / opening device consisting of a permanent magnet / 11 / controlled steel ball / 19 / non-return valves. 11. The gas burner according to claim 9, characterized in that it preferably has an electromagnetically pulsed actuated, one-sided spring-loaded tongue tongue (20) with a noise-opening device. 12. Gas burner according to claim 11, characterized in that the adjacent tongues (20 / spring tongues / 23) are in one-way mechanical actuation. BOW. 1-12. Gas burner according to any one of claims 1 to 3, characterized in that the tip also has structural elements of the program-closing closure-opening element having a phase-velocity synchronous circuit with the product carrier to be heated.