CN112113431A

CN112113431A - Flame gunning machine for refractory lining of industrial furnace

Info

Publication number: CN112113431A
Application number: CN202011151830.6A
Authority: CN
Inventors: 王世松
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2020-12-22

Abstract

The invention relates to a flame gunning machine for a refractory lining of an industrial furnace, which is key equipment for flame gunning of the refractory lining of the industrial furnace. Oxygen and fuel gas carrying fluidized powder gunning material are respectively provided from the outside, and are converted into sleeve delivery by a double-layer sleeve synthesizer with a rotatable component, the oxygen is on the outer layer, and the fuel gas is on the inner layer. When the oxygen reaches the main nozzle, the oxygen is converted from high pressure and low speed to normal pressure and high speed to enter the main nozzle in a strong rotation mode, and the oxygen and the fuel gas are fully and uniformly mixed in a non-combustion state and then are sprayed out to be rapidly combusted. The flame heats the surface of the lining wall to a high-temperature molten state, and meanwhile, the gunning material is sprayed and attached to the lining wall in a scattered mode to form high-temperature ceramic sintering, so that the purpose of flame gunning is achieved. On the outer circumference of the main nozzle, a plurality of sets of ignition nozzles are arranged to eliminate the possibility of fire extinguishing. The gunning machine can make the flame nozzle swing up and down, left and right, and adjust the distance to the gunning surface, and also can make the nozzle move forward and backward or rotate to reach the new gunning position.

Description

Flame gunning machine for refractory lining of industrial furnace

Technical Field

The present invention relates to a key equipment of flame gunning device used for flame gunning under high-temp. state of refractory lining of industrial furnace (for example, steel-smelting converter, electric furnace, ladle, steel-rolling heating furnace and coke oven).

Background

In the operation process of the industrial furnace, the hearth is in a high-temperature state, and the inner side of the furnace wall is built into a high-temperature resistant refractory lining wall by using refractory materials. For example: converters, electric furnaces and ladles in steel making production, heating furnaces in steel rolling production, coke ovens in coking production, and the like. The refractory lining wall is tightly attached to a steel structure shell of the industrial furnace from the inner side, and the refractory lining wall is kept from deforming for a long time by the rigidity of the steel structure shell, so that the refractory lining wall is a foundation for ensuring long-time uninterrupted use of the industrial furnace. The refractory lining wall of an industrial furnace is made of a high-temperature resistant material and has a high-temperature resistance. On the other hand, the refractory material generally has a good heat insulation function, the refractory lining wall prevents the high temperature of the hearth of the industrial furnace from dissipating to the external space, the hearth is kept in a high-temperature state all the time, the steel structure shell of the industrial furnace is protected, and the high temperature in the hearth is prevented from damaging the steel structure shell. The refractory lining wall is made of the refractory material of which material is selected, and the wall thickness of the lining wall is determined according to the respective characteristics of different industrial furnaces. No matter which kind of industrial furnace, high temperature in its furnace to the refractory lining wall, more or less all can cause the erosion, is the main factor of the thickness of refractory lining wall attenuate gradually, appears the local extreme phenomenon of quick damage of refractory lining wall even. If the thickness of most areas or parts of the refractory lining wall of the industrial furnace is lower than the safe use limit, the refractory lining wall cannot be maintained and repaired in time. The industrial furnace must stop normal production operation and enter a production stop maintenance state. And (4) dismantling the old refractory lining which can not be reused, and rebuilding a new refractory lining to meet the safety production requirement of the next stage. No matter how good or bad the quality of the refractory material used for building the refractory lining of the industrial furnace is, the refractory material is effectively consumed in the production process, the refractory material is eroded by high temperature in the hearth and only occupies a very small part, and the rest of the refractory material is removed as a secondary refractory material with extremely low reutilization rate after being removed, so that the great waste of the refractory material resources is caused. The whole process of building a new refractory lining wall of an industrial furnace is basically manual operation by workers, the working environment is severe, most of the industrial furnace is in a high-temperature and dust space, the labor intensity is high, the mechanization degree is low, a large amount of labor is occupied, and the labor cost is extremely high. And frequent shutdown maintenance, compressed normal production running time, reduced equipment startup rate and increased production cost of products. In order to prolong the service life of the refractory lining of the industrial furnace, high-quality refractory materials are used as raw materials of the basic structure of the refractory lining of the industrial furnace, and strict and elaborate work is performed in the process of building the refractory lining of the industrial furnace, so that the quality of the built lining wall is improved. The refractory lining of the industrial furnace is made of high-end-quality refractory materials, the unit price is inevitably increased, although the use times of the refractory lining of the industrial furnace are increased, the range is limited, and the economic benefit of the reaction is not improved.

Spray repair is an important way for prolonging the service life of the refractory lining, namely, the thickness of the thinned refractory lining in production is reduced, and the refractory lining is timely restored to the original thickness through spray repair operation in the interval period of production. In the production realization, the method is suitable for part of industrial furnaces of spray repair operation, really achieves obvious effect, and greatly improves the use times of the refractory lining. The actual mature spray repair method comprises the following steps: and spray repairing by a dry method, a semi-dry method and a wet method. However, the flame gunning method is still in an exploration stage due to the imperfect technology, equipment, safety and other aspects, and there is no practical application report. No matter which kind of gunning mode is adopted, at first the gunning material can adhere to the refractory lining wall surface that needs the gunning to under the high temperature effect, form ceramic sintering and form as an organic whole, accomplish the gunning process. The dry method, the semi-dry method and the wet method have the advantages that: the automatic spray repair device has the advantages of low degree of mechanization and automation, simple operation, safety, reliability, simple equipment, no occupation of a working site, convenient movement and the like when spray repair operation is carried out. The gunning defects of the dry method, the semi-dry method and the wet method are obvious and can influence the respective method which cannot be deeply used and widely used. The dry gunning is carried out, the gunning material sprayed rebounds and falls off the vertical refractory lining wall surface of the industrial furnace, the adhesion rate is extremely low, the gunning material can only be accumulated on the surface of the refractory lining wall with small level or gradient, the refractory lining wall surface and the gunning material cannot be sintered into a whole, the gunning material quickly runs off in the production and operation process, and the gunning effect is poor. The semi-dry and wet gunning processes add proper amount of water into the gunning material, mix them uniformly to form the wet gunning material, and then gunning it on the refractory lining wall of the industrial furnace. Although the wet gunning mix has a high adhesion rate to the wall surface of the refractory lining at normal temperature, the wet gunning mix cannot be put into production operation immediately after gunning operation is completed, long-time normal-temperature maintenance is required, and the maintenance is carried out for at least three days under suitable climatic conditions, so that the moisture contained in the refractory lining wall is completely volatilized and exuded after gunning, and the wet gunning mix can be put into production operation after passing through a low-temperature to high-temperature oven process in a hearth, and is obviously unsuitable for an industrial furnace with a tight production operation rhythm. After the moisture is added, the wet gunning mix cannot gunning the hot refractory lining wall, because the wet gunning mix contacts the hot refractory lining wall, the surface of the high-temperature refractory lining wall is rapidly cooled, and the phenomena of cracking, pulverization and falling-off occur along with the refractory lining wall. Not only does not achieve the required spray repair effect, but also can damage the original refractory lining wall.

When the flame gunning of the refractory lining of the industrial furnace is carried out, stable and continuous high-temperature flame with the temperature of nearly 3000 ℃ is generated and maintained at the outlet of a nozzle of the flame gunning machine, and a local area of the surface of the refractory lining wall of the industrial furnace is heated to a high-temperature molten state. Meanwhile, fine granular refractory material bulk materials are continuously, uniformly and dispersedly sprayed and repaired on the surface of the heated lining wall. The hot melt agent mixed in proportion in the gunning mix is changed into a high-temperature molten state from normal-temperature solid powder rapidly under the high-temperature action of the lining wall, and is adhered to the refractory lining wall of the industrial furnace. The refractory lining wall and the gunning material form a high-temperature liquid-phase ceramic, and the high-temperature liquid-phase ceramic is sintered and integrated. During each working gap of the industrial furnace, flame gunning can be repeatedly carried out, so that the refractory lining can be comprehensively and daily maintained and repaired, and the service life of the refractory lining is prolonged. The flame gunning of the refractory lining of the industrial furnace can theoretically prolong the service life of the lining for a long time. The aim of ensuring the flame gunning to be achieved is as follows: the service life of the industrial furnace refractory lining is greatly prolonged, the removal of the old refractory lining and the construction of a new industrial furnace refractory lining are greatly reduced, the cost for the industrial furnace refractory lining is reduced to less than half, and the economic benefit is good. The flame gunning machine can make the nozzle swing up and down, left and right, and adjust the distance to the gunning surface, and also can make the nozzle move forward and backward or make forward and backward rotation to reach the new gunning position. The nozzle of the flame gunning machine has two functions of backfire prevention and flame-out prevention, so that the safety accidents that oxygen and fuel gas are uniformly mixed and then sprayed out and detonated are caused due to sudden flameout at the outlet of the nozzle are avoided. The flame gunning method is used for gunning the refractory lining wall of the industrial furnace, and has the advantages that: the refractory lining wall in a high-temperature state can be gunned, when flame gunning is carried out, the surface of the refractory lining wall needs to be heated to a high-temperature molten state by flame, and the higher the surface temperature of the gunned refractory lining wall is, the better the flame gunning is. The gunning material is changed from normal-temperature solid powder into a high-temperature molten state rapidly due to the high-temperature action of the refractory lining wall, the adhesion rate is high, the rebound and falling loss of the gunning material is less, and the effective utilization rate is high. The gunning mix and the refractory lining wall are sintered and synthesized into a whole by high-temperature liquid-phase ceramic, the gunning mix and the refractory lining wall are combined with each other with high strength, the high-temperature erosion resistance in the hearth of the industrial furnace is strong, the gunning mix can be put into production operation quickly after flame gunning, the refractory lining wall does not need to be maintained, the durability is good, the service life of the refractory lining of the industrial furnace is greatly prolonged, the starting rate of the industrial furnace is correspondingly improved, and the production cost is reduced. The gunning material adopted by flame gunning is only refractory material bulk material with common quality, the purchase cost is lower, the flame gunning refractory lining wall of the industrial furnace is ensured, the cost of the refractory lining of the industrial furnace is greatly reduced, and a solid foundation is provided. The flame gunning can completely repair the refractory lining wall of the industrial furnace, and can also be used for selective fixed-point gunning to repair the locally seriously damaged lining wall. The comprehensive flame gunning process characteristics are not suitable for flame gunning and have the following characteristics: 1) the flame gunning is inconvenient to be carried out on the refractory lining wall of the industrial furnace at normal temperature. If the flame gunning is carried out on the refractory lining wall at the normal temperature, the surface of the lining wall at the normal temperature is heated to a high-temperature molten state, the required heat energy is inevitably increased, the time is prolonged, and the consumed fuel gas quantity is increased. After the flame gunning is finished, the surface of the lining wall quickly returns to the normal temperature state from the high-temperature melting state, the temperature change of the refractory lining is huge in a short time, excessive cracks with variable trend are generated due to excessive thermal stress in the refractory lining, and the high-temperature erosion resistance of the lining wall is greatly reduced. Particularly, refractory linings made of refractory materials with poor thermal shock resistance are used. 2) After all, the heating capacity of the flame gunning device is limited, and the gunned lining wall surface cannot be rapidly heated to a high-temperature molten state. The ability of rapid high temperature ceramic sintering is limited, and only a small flow of gunning mix can be sprayed onto the surface of the lining wall. Flame gunning is a slow process, and a long time is needed for large-area flame gunning of the surface of the refractory lining wall of the industrial furnace. For the industrial furnace with fast production rhythm and short working clearance time, the flame gunning mode is inconvenient to implement. 3) The flame gunning device has large structural scale, and the contained main equipment and auxiliary equipment have more numbers, are inconvenient to move, and are inconvenient to implement the flame gunning mode in narrow and small places of a working site.

Disclosure of Invention

The invention relates to a flame gunning machine for a refractory lining of an industrial furnace, which is important equipment for gunning the refractory lining of the industrial furnace by flame, and is mainly characterized in that: the double-layer gunning sleeve of the flame gunning machine is inserted into a hearth of an industrial furnace at a furnace door through the movement of a traveling system of the flame gunning machine. Oxygen and gas carrying fluidized solid powder are supplied by the flame gunning machine and are respectively conveyed to the nozzles at the end parts of the flame gunning machine through double-layer gunning sleeves. Oxygen is on the outer layer of the double-layer gunning sleeve, and fuel gas is on the inner layer. The nozzle makes the high-pressure and low-speed oxygen delivered into it change into normal-pressure, high-speed and strong-rotation form. The oxygen rotating at high speed and the fuel gas are mixed into a whole in the nozzle, and before being sprayed out from the nozzle, the oxygen and the fuel gas can be premixed quickly and sufficiently under the condition of complete non-combustion. The axial flow velocity of the mixed gas flow of the oxygen and the fuel gas in the nozzle is adjusted to be 1.5-4 times of the flame combustion velocity, so that the dangerous phenomenon of combustion or tempering in the nozzle is prevented. The oxygen and the fuel gas which are fully mixed are sprayed out at the outlet of the nozzle and also take a strong rotating form. Can produce short flame with rapid combustion, good stability, high temperature and rapid dispersion. The ultra-high temperature short flame effectively reduces the heat dissipation to the surrounding space, simultaneously increases the heating area of the refractory lining wall at the spray repair position, and has quick temperature rise and high heat efficiency. The gunning material is sprayed out in a strong-rotation spiral shape at the outlet of the nozzle, and is quickly and uniformly dispersed, the gunning material does not accumulate on the surface of the liner wall when contacting the liner wall, and the dispersion area is large and is matched with the requirements of the flame gunning process.

The axial flow rate of the mixed gas flow of the oxygen and the fuel gas in the main nozzle is adjusted to be far higher than the flame combustion speed of the main nozzle. Although the dangerous phenomena of combustion or backfire do not occur inside the nozzle, the mixed gas flow is extremely liable to generate the phenomenon of misfire at the nozzle outlet, and is also very dangerous. The mixed gas flow of oxygen and fuel gas ejected from the nozzle is large, and the mixed gas quickly fills the semi-closed industrial furnace hearth, so that detonation is easily generated, namely, explosion danger is generated. In order to prevent the main nozzle from generating a fire extinguishing risk by ejecting mixed gas flow, a plurality of sets of ignition nozzles are arranged on the outer circumference of the main nozzle and closely attached to the main nozzle. When the strong rotating oxygen and the fuel gas form mixed gas flow, the mixed gas flow is sprayed out from the nozzle of the main nozzle to an empty space, the flow speed of the mixed gas flow is rapidly reduced, and the mixed gas flow is rapidly ignited by the flame of the ignition nozzle when reaching or being lower than the flame combustion speed of the mixed gas flow, so that the mixed gas flow is prevented from deflagrating after accumulation. The ignition nozzle is also a mixed gas flow of oxygen and fuel gas, and the problems of how to prevent backfire and misfire also exist. Each set of ignition nozzle adopts a large number of flame spray holes with very small aperture, and the extremely small aperture effectively prevents backfire. Because the flame hole diameter of the ignition nozzle is very small, even if the mixed gas flow is sprayed out from the flame hole at a high speed, the distance from the mixed gas flow to the flame burning speed is very short, and the cluster effect of the flame hole is added, so that the possibility of fire dropping does not exist. The mixed gas provided for the ignition nozzle is conveyed from the completely closed pipeline, although the external environment is high-temperature flame, the normal-temperature mixed gas exists in the pipeline, the temperature difference from the ignition point is very large, the flow speed is high, the temperature rise is very little, and the possibility of backfire caused by ignition does not exist. Because the ignition nozzle is closer to the refractory lining wall, the sprayed high-temperature flame has an auxiliary heating effect on the lining wall, so that the temperature of the heating lining wall is increased more quickly.

The oxygen and fuel gas supplied to each set of ignition nozzles are from the same set of ignition gas distributor. The ignition gas distributor receives oxygen and fuel gas respectively, which are transmitted by respective pipelines, and the oxygen is transmitted by a plurality of sets of double-layer pipelines, and the fuel gas is transmitted by an inner layer. When the ignition nozzle is close to the ignition nozzle, the oxygen and the fuel gas are combined into a single pipeline for conveying, so that the oxygen and the fuel gas are fully and uniformly mixed when the ignition nozzle is reached. The ignition gas distributor is arranged at the position close to the root of the main jet-compensation sleeve, receives oxygen and fuel gas respectively conveyed by respective hoses, and then changes the oxygen and the fuel gas into a plurality of double-layer sleeves for output. The component distributing core is hung on the outer wall of the main jet compensation sleeve, and is mutually and rigidly connected and synchronously rotated. The distribution core is provided with an oxygen chamber and a gas chamber, which respectively receive oxygen and gas and simultaneously convert the oxygen and the gas into a plurality of sets distributed in the circumferential direction, wherein each set is provided with oxygen on the outer layer, and the gas is conveyed by a double-layer sleeve on the inner layer. The outer sleeve of the ignition gas distributor and the distribution core form an oxygen chamber, a gas chamber and two closed chamber cavities. The two interfaces of the outer sleeve respectively introduce oxygen and fuel gas into the oxygen chamber and the fuel gas chamber. The distributing core rotates with the main jet-repairing sleeve, the outer sleeve does not rotate, the bearing keeps concentricity, and the elastic sealing ring seals the gap to prevent oxygen or fuel gas from leaking. The ignition gas distributor swings along with the main jet compensation sleeve in all directions, so that small-amplitude displacement changes exist, and the oxygen pipe and the gas pipe connected with the ignition gas distributor are rubber hoses, so that the displacement is completely within a compensation range.

The rotatable double-layer sleeve synthesizer is also an important part of the flame gunning machine for the refractory lining of the industrial furnace. Oxygen and fuel gas carrying fluidized solid powder are respectively conveyed to a rotatable double-layer sleeve synthesizer from the outside through two pipelines. The synthesizer converts oxygen and fuel gas into the fuel gas which is continuously conveyed through a rotatable double-layer sleeve, wherein the oxygen is arranged on the outer layer, and the fuel gas carrying fluidized solid powder is arranged on the inner layer. The two kinds of air flows are respectively conveyed by two fixed pipelines, are converted into a rotatable concentric double-layer pipeline and are conveyed out, and enter the main jet compensation sleeve. The movable interface is inevitably arranged at the switching position inside the synthesizer, and the possibility of air leakage exists. The movable joint of the gas pipeline adopts a multi-pole rubber sealing ring, a mechanical labyrinth type and lubricating grease filling, and a plurality of sealing forms play a role in parallel, so that no leakage of gas is ensured. Meanwhile, the lubricating grease can lubricate the rolling bearing and the movable joint of the gas pipeline in the synthesizer. The oxygen movable interface adopts a double-layer sleeve mode to ensure that the inner layer and the outer layer rotate relatively, the contact surface is in high-finish degree movable fit, and a plurality of layers of rubber sealing rings are involved in sealing. The gas and oxygen interface adopts the tight fit of big magnitude of interference between deep hole and the long shaft face, increases the welding at the terminal surface of cooperation tip. On one hand, mutual gas channeling absolutely does not exist between oxygen and fuel gas, on the other hand, the inner layer pipeline and the outer layer pipeline can synchronously rotate, and large torque force can be transmitted between the inner layer pipeline and the outer layer pipeline. The inner layer steel pipe and the outer layer steel pipe of the main spray repair sleeve are connected with the main component of the synthesizer through the fine thread and the end part in a welding mode. The rotating part of the synthesizer is rigidly connected with the main jet compensation sleeve, the rotating power source is provided with power by an external driving gear, and the part driven gear of the synthesizer is driven. When the flame gunning of the refractory lining of the industrial furnace is carried out, the flame nozzle of the gunning machine is generally positioned in the deep position of the hearth of the industrial furnace for operation. The rotatable double-layer gunning sleeve is relatively long, and is provided with an ignition gas distributor and a plurality of sets of ignition gas conveying sleeves which are tightly attached to the periphery of the main gunning sleeve and act together with the main gunning sleeve. The synthesizer supports the gunning sleeve while carrying its weight and creating a very large cantilever bending moment force.

When the flame gunning machine for the refractory lining of the industrial furnace works, the gunning sleeve extends into a hearth of the industrial furnace, and the all-dimensional gunning refractory lining wall is required to be achieved, and the movement of the gunning sleeve is as follows: the rotation in the positive and negative directions changes the flame spray-repairing surface in the circumferential direction of the lining wall. The movement in the front and back directions changes the flame spray repair surface in the depth direction of the refractory lining of the industrial furnace. The distance from the flame nozzle to the lining wall is adjusted by the omnibearing swinging formed by matching and cooperating the left direction, the right direction, the upper direction and the lower direction. The flame gunning machine for the refractory lining of the industrial furnace is mainly assembled by various parts and components, and shows that the flame gunning machine has all the movement functions. The vertical swing frame is provided with an upper layer and a lower layer, the rotatable double-layer sleeve synthesizer is fixedly arranged on the upper layer, and the rotary driving speed reducer is fixedly arranged on the lower layer. And a driving gear arranged on an output shaft of the rotary driving speed reducer drives a driven gear of a component of the rotatable double-layer sleeve synthesizer, so that the gunning sleeve does forward and backward rotary motion. The vertical swing frame is rigidly connected with the vertical swing main shaft, two ends of the vertical swing main shaft are hinged with two symmetrical vertical plates through vertical swing bearings, the vertical swing frame is supported and suspended by the two vertical plates, and the vertical swing frame can swing in a small range in the vertical direction between the two vertical plates. The two vertical plates are fixed on the horizontal swing support plate, the vertical swing hydraulic cylinder is connected between the vertical swing frame and the horizontal swing support plate, and under the action of hydraulic force, a piston of the vertical swing hydraulic cylinder moves in the vertical direction to enable the vertical swing frame to swing in the vertical direction, namely the gunning sleeve swings in the vertical direction. The horizontal swing support plate is rigidly connected with the horizontal swing shaft, the horizontal swing support sleeve is rigidly connected with the vehicle body, an upper set of horizontal swing bearing and a lower set of horizontal swing bearing are arranged between the horizontal swing shaft and the horizontal swing support sleeve, the horizontal swing support plate and the vehicle body are ensured to swing relatively in the horizontal direction, and simultaneously, the torque force of the horizontal swing support plate is transmitted to the vehicle body. An end face bearing is arranged between the horizontal swing support plate and the vehicle body, so that the vehicle body bears all the weight on the horizontal swing support plate. A horizontal swing hydraulic cylinder is connected between the vehicle body and the horizontal swing supporting plate, and a piston of the horizontal swing hydraulic cylinder moves in the horizontal direction under the action of hydraulic force, so that the horizontal swing frame swings in the horizontal direction, namely, the gunning sleeve swings in the horizontal direction. Two sets of driving wheels and two sets of driven wheels are arranged on the lower portion of the vehicle body, the driving wheels are rigidly connected with the driven chain wheels, the driving chain wheels are arranged on output shafts of the walking driving motor, and the driving chain wheels and the driven chain wheels are connected through chains to ensure that the vehicle body moves forwards and backwards. Namely, the gunning sleeve moves forwards and backwards.

Drawings

FIG. 1 is a front view of a flame gunning machine for refractory linings of industrial furnaces according to the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 1;

FIG. 4 is a schematic cross-sectional view of a rotatable double-walled tubing synthesizer construction of the present invention;

FIG. 5 is a schematic cross-sectional view of an ignition gas distributor configuration of the present invention;

FIG. 6 is a top view of the flame patching machine of the refractory lining of the industrial furnace of the present invention;

fig. 7 is a cross-sectional view of C-C of fig. 6.

In the figure:

1. the device comprises a vehicle body 2, a wheel seat 3, a driven chain wheel 4, a driving wheel 5, a chain 6, a traveling speed reducer 7, a driving chain wheel 8, an upper locking shaft 9, a vertical swing hydraulic cylinder 10, a locking pin 11, a vertical swing frame 12, a horizontal swing support plate 13, a driving gear 14, a rotation prevention frame 15, a fire damper 16, a driven wheel 17, an ignition nozzle 18, an ignition outer sleeve 19, an ignition inner sleeve 20, a rotary conveying outer sleeve 21, an inner nozzle seat 22, a rotary conveying inner sleeve 23, an inner nozzle 24, a nozzle seat 25, a main nozzle 26, a bottom fixing plate 27, an end surface bearing seat 28, an end surface bearing 29, an inner ring positioning sleeve 30, a horizontal swing shaft 31, a bottom positioning plate 32, a horizontal swing bearing 33, a horizontal swing support sleeve 34, a gas conveying pipe 35, a, The device comprises a rear cover 37, a gas sealing ring 38, a lubricating sealing inner ring 39, a bearing positioning sleeve 40, an outer sleeve 41, an oxygen conveying pipe 42, an intermediate sleeve 43, an oxygen sealing ring 44, an inner rotating pipe 45, an outer rotating pipe 46, a lubricating sealing outer ring 47, a rotating supporting bearing 48, a front cover 49, a key 50, a driven gear 51, a round nut 52, a compression nut 53, a rear end cover 54, a distributor bearing 55, an isolation sleeve 56, a positioning clamp spring 57, an anti-rotation pipe 58, a gas pipe 59, a gas distribution core 60, an oxygen pipe 61, a distributor sealing ring 62, a distributor outer sleeve 63, a transition sleeve 64, a fixed seat 65, a rear bolt 66, a horizontal swinging hydraulic cylinder 67, a front bolt 68, a rotatable double-layer sleeve synthesizer 69, an ignition gas distributor 70, a side blank cover 71, a vertical, Vertical swing main shaft 73, rotary speed reducer 74, pressure plate 75, vertical plate 76, side pressure plate.

Detailed Description

The structure or operation process of the flame gunning machine for the refractory lining of the industrial furnace is described by combining the accompanying drawings and embodiments:

as shown in FIGS. 1, 2 and 6, the main nozzle of the flame gunning machine for the refractory lining of the industrial furnace is supported by a double-layer sleeve composed of a rotary conveying outer sleeve 20 and a rotary conveying inner sleeve 22. Oxygen and gas carrying fluidized solid small-particle refractory gunning material are provided by a rotatable double-layer sleeve synthesizer 68 and are respectively conveyed to the main nozzle through the inner layer and the outer layer of the double-layer sleeve, the gas is arranged on the inner layer, and the oxygen is arranged on the outer layer. The gas carrying fluidized solid small-particle refractory gunning material is sprayed out from the inner rotary conveying sleeve 22 through the inner nozzle seat 21 and the inner nozzle 23 and enters a mixing area of an inner hole channel of the main nozzle 25. Oxygen with constant pressure enters the outer layer of the nozzle base 24 and the inner nozzle 23 through a channel formed by the outer layer of the rotary conveying inner sleeve 22 and the inner nozzle base 21 and the inner layer of the rotary conveying outer sleeve 20 to form a plurality of narrow parallel spiral air channels. Due to the back pressure generated by the plurality of parallel narrow spiral air channels, oxygen is converted from high pressure to low pressure close to normal pressure at two sides of the spiral air channels. That is, the oxygen is transported from high pressure and axial direction at low speed, and is changed into low pressure and high speed rotation to be sprayed spirally, and enters the mixing area of the inner hole channel of the main nozzle 25. The high-speed rotating oxygen flow and the fuel gas in the mixing area are fully premixed under the condition of non-combustion, and simultaneously, the mixed gas flow and the solid small-particle refractory gunning material are spirally sprayed out from the main spray pipe 25 in a high-speed rotating mode. The axial flow velocity of the mixed air flow in the main nozzles 25 is higher than the flame combustion velocity, and after the mixed air flow is ejected by high-speed rotation, the flow velocity of the mixed air flow is rapidly reduced, and the mixed air flow is rapidly ignited and combusted. A plurality of ignition nozzles 17 are uniformly distributed on the outer circumference of the main nozzle 25, each ignition nozzle 17 is supported by a respective ignition outer sleeve 18, and the ignition outer sleeve 18 continuously supplies mixed gas flow of oxygen and fuel gas which are uniformly mixed to the ignition nozzle 17. The ignition gas distributor 69 is arranged at the root of the rotary conveying outer sleeve 20, and a plurality of ignition double-layer sleeves consisting of the ignition outer sleeve 18 and the ignition inner sleeve 19 are connected with the ignition gas distributor 69. The ignition double-layer sleeve is arranged in an oxygen chamber and a fuel gas chamber of the ignition gas distributor 69, and respectively receives oxygen and fuel gas and transmits the oxygen and the fuel gas to the ignition nozzle 17, wherein the oxygen is arranged on the outer layer, and the fuel gas is arranged on the inner layer. When the ignition double-layer sleeve is close to the ignition nozzle 17, the ignition double-layer sleeve is converted into a single layer, and oxygen and fuel gas are rapidly mixed and then are conveyed to the ignition nozzle 17. The ignition nozzle 17 is sprayed into the space through a plurality of small holes which are dense, so that combustion is generated and a stable combustion flame state is maintained, the possibility of fire extinguishing or backfire does not exist, and the possibility of flameout of the main nozzle in any state is eliminated.

As shown in FIGS. 1, 4 and 6, the oxygen and the gas carrying the fluidized solid powder are transferred in the rotatable double-layer sleeve synthesizer 68 from the outside through the oxygen delivery pipe 41 and the gas delivery pipe 34 respectively, and are output through the rotatable double-layer sleeve composed of the inner rotary delivery sleeve 22 and the outer rotary delivery sleeve 20, the oxygen is at the outer layer, and the gas is at the inner layer. The oxygen flow conveying and converting line comprises: through the oxygen delivery tube 41 and into the annular cavity formed by the intermediate sleeve 42 and the outer rotating tube 45. Through a plurality of through holes regularly distributed on the part of the outer rotating pipe 45, oxygen enters an annular channel formed by the inner rotating pipe 44 and the outer rotating pipe 45 and is output between the rotary conveying inner sleeve 22 and the rotary conveying outer sleeve 20. The intermediate sleeve 42 is a non-rotating member, the outer rotating pipe 45 is a rotating member, and a multi-layer seal composed of an oxygen seal ring 43 is provided between the contact of the two members to prevent oxygen leakage. The gas with fluidized solid powder enters the inner hole of the rear cover 36 through the gas conveying pipe 34, enters the inner rotating pipe 44 and is finally output through the inner rotating conveying sleeve 22. The back cover 36 is a non-rotating component and the inner rotating tube 44 is a rotating component, and the fuel gas is conveyed into the rotating pipe from the non-rotating pipe, and a movable interface is arranged at the connection position. Gas is prevented from leaking from the movable interface, and a double-layer gas sealing ring 37 is arranged between the contact surfaces of the rear cover 36 and the inner rotating pipe 44 for sealing. The middle sleeve 42, the oxygen conveying pipe 41 and the outer sleeve 40 are assembled into a whole, the two bearing positioning sleeves 39 are respectively arranged on two sides of the middle sleeve 42, and in an inner hole of the outer sleeve 40, the two bearing positioning sleeves 39 are in contact positioning with inner side outer rings of the front and rear rotary supporting bearings 47. The contact surface between the two bearing positioning sleeves 39 and the inner hole of the outer sleeve 40 is provided with a lubricating sealing outer ring 46 to play a static sealing role, and the contact surface between the two bearing positioning sleeves 39 and the outer rotating pipe 45 is provided with a lubricating sealing inner ring 38 to play a dynamic sealing role to prevent lubricating grease in the rotating support bearing 47 from leaking. The outer race outside the front end rotation support bearing 47 is positioned by a front cover 48, and the front cover 48 is integrally connected to the outer casing 40. The outer side of the rear end rotation support bearing 47 is positioned by the rear cover 36, and the outer ring of the inner ring is positioned by the rear positioning sleeve 35. The rear cover 36 is integrally connected to the outer sleeve 40, and the rear positioning sleeve 35 is integrally connected to the outer rotary pipe 45. The driving gear 13 is mounted on the output shaft of the rotary speed reducer 73 with a motor, and the driving gear 13 drives the driven gear 50 to rotate. The key 49 connects the driven gear 50 and the outer rotary pipe 45 into a whole, the outer side surface of the key is pressed and positioned by a round nut 51, and the inner side surface of the key is in contact positioning with the outer side of the inner ring of the rotary supporting bearing 47 at the front end.

As shown in figures 2, 5 and 6, the oxygen and the fuel gas which are respectively conveyed from the outside through an oxygen pipe 60 and a fuel gas pipe 58 are converted into ignition gas in an ignition gas distributor 69 and simultaneously enter a plurality of ignition double-layer sleeves which are annularly arranged on the peripheral circumference of the rotary conveying outer sleeve 20, an ignition outer sleeve 18 and an ignition inner sleeve 19, wherein the oxygen is at the outer layer and the fuel gas is at the inner layer. Oxygen is introduced from the oxygen tube 60, passes through the distributor outer sleeve 62, enters the oxygen cavity of the gas distribution core 59, is uniformly distributed to each ignition double-layer sleeve, and is output from the outer layer of the ignition double-layer sleeve consisting of the ignition outer sleeve 18 and the ignition inner sleeve 19. The gas is introduced from the gas pipe 58, passes through the distributor outer sleeve 62, enters the gas cavity of the gas distribution core 59, and is uniformly distributed to the ignition inner sleeve 19 of each double-layer sleeve to be output. The distributor outer casing 62 is a non-rotating member, and the gas distribution core 59 is a rotating member integrally connected to the rotary conveyance outer tube 20. The movable fit between the distributor housing 62 and the gas distribution core 59 is ensured by two sets of distributor bearings 54. The dynamic seal between the distributor outer casing 62 and the gas distribution core 59 by the plurality of distributor seal rings 61 prevents oxygen and gas from leaking from the oxygen chamber and the gas chamber, respectively. The multiple ignition outer sleeves 18 are connected with the oxygen chambers of the gas distribution core 59 through the transition sleeves 63, and the multiple ignition inner sleeves 19 are connected with the gas chambers of the gas distribution core 59. The two sets of distributor bearings 54 are separated by the spacer sleeve 55, the inner ring of the outer distributor bearing 54 is pressed by the rear end cover 53, and the rear end cover 53 is pressed by the pressing nut 52 through the thread matching with the gas distribution core 59, so that the axial positioning of the two sets of distributor bearings 54 relative to the gas distribution core 59 is determined. The positioning snap spring 56 is clamped in a clamping groove in the inner diameter of the distributor outer sleeve 62, and the relative axial momentum of the gas distribution core 59 and the distributor outer sleeve 62 is in a small range through the outer rings of the two sets of distributor bearings 54. The rotation preventing pipe 57 is rigidly connected with the distributor outer sleeve 62, the rotation preventing pipe 57 is inserted into the hole of the rotation preventing frame 14, and the rotation preventing frame 14 is rigidly connected with the vertical plates 75 at two sides, so that the distributor outer sleeve 62 does not rotate along with the gas distribution core 59.

As shown in fig. 1, 3, 6 and 7, the front and rear pressing plates 74 press the outer jacket 40 of the rotatable double pipe combiner 68, and the pressing plates 74 are integrally connected to the vertical swinging frame 11, so that the rotatable double pipe combiner 68 and the vertical swinging frame 11 synchronously swing vertically. The vertical swing frame 11 is supported by a vertical swing main shaft 72, both ends of the vertical swing main shaft 72 are mounted in the inner hole of the vertical swing bearing 71, and the side pressure plate 76 is rigidly connected with the vertical swing main shaft 72 and presses the inner ring of the vertical swing bearing 71. The outer ring of the vertical swing bearing 71 is installed in the supporting hole of the vertical plate 75, and the side blank cap 70 is rigidly connected with the vertical plate 75 and presses the outer ring of the vertical swing bearing 71. The vertical swing frame 11 uses the bearing positions of the vertical plates 75 at two sides as hinge points to swing in the vertical direction. The bottom of the vertical plate 75 is fixed on the horizontal swing support plate 12, and the bottom of the vertical swing hydraulic cylinder 9 is hinged with the horizontal swing support plate 12 through the locking pin 10. The upper part of the piston rod of the vertical swing hydraulic cylinder 9 is hinged with the vertical swing frame 11 through the upper locking shaft 8. When the vertical swing hydraulic cylinder 9 is under the action of hydraulic force, the piston rod moves in an extending and contracting manner, so that the vertical swing frame 11 swings up and down. The horizontal swing support plate 12 is rigidly connected with a horizontal swing shaft 30, two ends of the horizontal swing shaft 30 are respectively provided with a set of horizontal swing bearings 32, two sets of horizontal swing bearings 32 are arranged on the inner ring of the horizontal swing support sleeve 33, and the horizontal swing support sleeve 33 is connected with the vehicle body 1 into a whole through an end face bearing seat 27. The bottom fixing plate 26 reinforces the connection strength of the horizontal swing support sleeve 33 and the vehicle body 1. The bottom positioning plate 31 is rigidly connected to the horizontal swing shaft 30, and presses an inner ring end surface of the lower horizontal swing bearing 32, so that the horizontal swing bearing 32 is positioned in the axial direction of the horizontal swing shaft 30. The bending moment force existing in the horizontal swing support plate 12 is transmitted to the upper and lower horizontal swing bearings 32 through the horizontal swing shaft 30, then transmitted to the horizontal swing support sleeve 33, and finally transmitted to the vehicle body 1 through the bottom fixing plate 26 and the end face bearing block 27. The gravity of the horizontally swinging support plate 12 is carried by the end face bearing 28 and is transmitted to the vehicle body 1 through the end face bearing block 27. The inner ring positioning sleeve 29 and the horizontal swinging support sleeve 33 are used for positioning the inner rings of the upper end panel and the lower end panel of the end face bearing seat 27 respectively. The fixed base 64 is fixed to the vehicle body 1, and the rear end of the rigid body of the horizontal swing hydraulic cylinder 66 is hinged to the fixed base 64 by a rear latch 65. The front part of the piston rod of the horizontal swing hydraulic cylinder 66 is hinged to the horizontal swing support plate 12 by a front pin 67. When the horizontal swing hydraulic cylinder 66 is hydraulically operated, the piston rod is extended and retracted, so that the horizontal swing support plate 12 horizontally swings about the central axis of the horizontal swing shaft 30. Four sets of wheel seats 2 are arranged at four corners below the vehicle body 1, and the driving wheels 4 and the driven wheels 16 are respectively arranged at the rear part and the front part of the vehicle body 1 through the wheel seats 2. A walking speed reducer 6 with a motor is arranged on the vehicle body 1, and a driving sprocket 7 is arranged on an output shaft of the walking speed reducer. The driven chain wheel 3 and the driving wheel 4 are connected into a whole and rotate synchronously. The chain 5 transmits the torque of the driving sprocket 7 to the driven sprocket 3 to rotate the driving wheel 4 forward and backward, thereby moving the vehicle body 1 forward and backward. The fire baffle 15 is arranged at the front part of the vehicle body 1 and used for blocking high-temperature radiant heat of an industrial furnace hearth and eliminating the damage of the high-temperature radiant heat to equipment.

Claims

1. The utility model provides an industrial furnace refractory lining flame gunning machine which characterized by: the machine structure comprises a rotating part of a rotatable double-layer sleeve synthesizer (68), and the rotating part is rigidly connected with a double-layer sleeve composed of a rotary conveying outer sleeve (20) and a rotary conveying inner sleeve (22); the double-layer sleeve supports a main nozzle which consists of an inner spray head (23) and a main nozzle (25); the fuel gas is sprayed out from the inner sleeve (22) through the inner nozzle seat (21) and the inner nozzle (23) and enters a mixing zone of an inner hole channel of the main nozzle (25); oxygen enters the outer layers of the nozzle base (24) and the inner nozzle (23) from a channel formed by the outer layers of the rotary conveying inner sleeve (22) and the inner nozzle base (21) and the inner layer of the rotary conveying outer sleeve (20) to form a plurality of parallel narrow spiral air channels, is sprayed out in a rotary spiral manner and also enters a mixing area of an inner hole channel of the main nozzle (25); the rotating oxygen flow and the fuel gas are fully premixed in the mixing zone and are spirally sprayed out from the main spray pipe (25) in a high-speed rotating way; the ignition gas distributor (69) is arranged at the root part of the rotary conveying outer sleeve (20), and a plurality of ignition double-layer sleeves consisting of the ignition outer sleeve (18) and the ignition inner sleeve (19) are connected with the ignition gas distributor (69); a plurality of ignition nozzles (17) are uniformly distributed on the outer circumference of the main nozzle (25), each ignition nozzle (17) is supported by a respective ignition outer sleeve (18), and the ignition outer sleeves (18) continuously provide mixed gas flow with uniform mixing of oxygen and fuel gas to the ignition nozzles (17); the ignition double-layer sleeve is arranged in an oxygen chamber and a fuel gas chamber of an ignition gas distributor (69) and respectively receives oxygen and fuel gas and transmits the oxygen and the fuel gas to the ignition nozzle (17), the oxygen is arranged on the outer layer, and the fuel gas is arranged on the inner layer; when the ignition nozzle (17) is approached, the ignition double-layer sleeve is converted into a single layer, and oxygen and fuel gas are quickly mixed and then are conveyed to the ignition nozzle (17); the ignition spray head (17) is densely provided with a plurality of small holes and is sprayed out to the space;

meanwhile, the pressing plate (74) presses the outer sleeve (40) of the rotatable double-layer sleeve synthesizer (68), and the pressing plate (74) is connected with the vertical swinging frame (11) into a whole, so that the rotatable double-layer sleeve synthesizer (68) and the vertical swinging frame (11) synchronously swing vertically; the vertical swing frame (11) is supported by a vertical swing main shaft (72), two ends of the vertical swing main shaft (72) are arranged in an inner hole of a vertical swing bearing (71), and a side pressure plate (76) is rigidly connected with the vertical swing main shaft (72) and tightly presses an inner ring of the vertical swing bearing (71); the outer ring of the vertical oscillating bearing (71) is arranged in a supporting hole of the vertical plate (75), and the side blank cap (70) is rigidly connected with the vertical plate (75) and tightly presses the outer ring of the vertical oscillating bearing (71); the vertical swing frame (11) takes the bearing positions of the vertical plates (75) at two sides as hinge points to swing in the vertical direction; the bottom of the vertical plate (75) is fixed on the horizontal swing support plate (12), and the bottom of the cylinder body of the vertical swing hydraulic cylinder (9) is hinged with the horizontal swing support plate (12) through a locking pin (10); the upper part of a piston rod of the vertical swing hydraulic cylinder (9) is hinged with the vertical swing frame (11) through an upper locking shaft (8); when the vertical swing hydraulic cylinder (9) is under the action of hydraulic force, the piston rod moves in an extending and contracting way, so that the vertical swing frame (11) swings up and down; the horizontal swinging support plate (12) is rigidly connected with a horizontal swinging shaft (30), two ends of the horizontal swinging shaft (30) are respectively provided with a set of horizontal swinging bearing (32), the inner ring of the horizontal swinging support sleeve (33) is provided with two sets of horizontal swinging bearings (32), and the horizontal swinging support sleeve (33) is connected with the vehicle body (1) into a whole through an end surface bearing seat (27); the bottom fixing plate (26) strengthens the connection strength of the horizontal swinging support sleeve (33) and the vehicle body (1); the bottom positioning plate (31) is rigidly connected with the horizontal swinging shaft (30) and presses the inner ring end surface of the lower horizontal swinging bearing (32) to position the horizontal swinging bearing (32) relative to the axial direction of the horizontal swinging shaft (30); bending moment force existing in the horizontal swinging support plate (12) is transmitted to an upper horizontal swinging bearing (32) and a lower horizontal swinging bearing (32) through a horizontal swinging shaft (30), then transmitted to a horizontal swinging support sleeve (33), and finally transmitted to a vehicle body (1) through a bottom fixing plate (26) and an end surface bearing seat (27); the gravity of the horizontal swing support plate (12) is borne by an end face bearing (28) and is transmitted to the vehicle body (1) through an end face bearing seat (27); the inner ring positioning sleeve (29) and the horizontal swinging supporting sleeve (33) are used for respectively positioning the inner rings of the upper end panel and the lower end panel of the end face bearing seat (27); the fixed seat (64) is fixed on the vehicle body (1), and the rear end of the rigid body of the horizontal swinging hydraulic cylinder (66) is hinged on the fixed seat (64) through a rear bolt (65); the front part of a piston rod of a horizontal swinging hydraulic cylinder (66) is hinged on a horizontal swinging support plate (12) through a front bolt (67); when the horizontal swinging hydraulic cylinder (66) is under the action of hydraulic force, the piston rod moves in an extending and contracting way, so that the horizontal swinging support plate (12) horizontally swings by taking the central axis of the horizontal swinging shaft (30) as the center; four sets of wheel seats (2) are arranged at four corners below the vehicle body (1), and the driving wheels (4) and the driven wheels (16) are respectively arranged at the rear part and the front part of the vehicle body (1) through the wheel seats (2); a walking speed reducer (6) with a motor is arranged on the vehicle body (1), and a driving sprocket (7) is arranged on an output shaft of the walking speed reducer; the driven chain wheel (3) and the driving wheel (4) are connected into a whole and rotate synchronously; the chain (5) transmits the torque of the driving chain wheel (7) to the driven chain wheel (3) to enable the driving wheel (4) to rotate forwards and backwards, so that the vehicle body (1) moves forwards and backwards; the fire damper (15) is installed at the front part of the vehicle body (1).

2. The flame gunning machine for the refractory lining of industrial furnace as claimed in claim 1, which is characterized in that: the oxygen delivery pipe (41) and the fuel gas delivery pipe (34) are arranged in the rotatable double-layer sleeve synthesizer (68); oxygen reaches an annular cavity consisting of an intermediate sleeve (42) and an outer rotating pipe (45) through an oxygen conveying pipe (41); oxygen enters an annular channel formed by the inner rotating pipe (44) and the outer rotating pipe (45) through a plurality of through holes regularly distributed on the outer rotating pipe (45) part, and is output between the rotary conveying inner sleeve (22) and the rotary conveying outer sleeve (20); the middle sleeve (42) is a non-rotating part, the outer rotating pipe (45) is a rotating part, and a multi-layer seal consisting of oxygen sealing rings (43) is arranged between the two parts; the fuel gas enters an inner hole of the rear cover (36) through the fuel gas conveying pipe (34), then enters the inner rotating pipe (44), and finally is output through the inner rotating conveying sleeve (22); the rear cover (36) is a non-rotating component, the inner rotating pipe (44) is a rotating component, and fuel gas is conveyed into the rotating pipeline from the non-rotating pipeline; a movable interface is arranged at the joint, and a double-layer gas sealing ring (37) is arranged between the contact surfaces of the rear cover (36) and the inner rotating pipe (44) for sealing; the middle sleeve (42), the oxygen conveying pipe (41) and the outer sleeve (40) are assembled into a whole, the two bearing positioning sleeves (39) are respectively arranged at two sides of the middle sleeve (42), the two bearing positioning sleeves (39) are in contact positioning with the inner side outer rings of the two sets of rotary supporting bearings (47) at the front end and the rear end in the inner hole of the outer sleeve (40); the contact surface between the two bearing positioning sleeves (39) and the inner hole of the outer sleeve (40) is provided with a lubricating sealing outer ring (46) to play a static sealing role, and the contact surface between the two bearing positioning sleeves (39) and the outer rotating pipe (45) is provided with a lubricating sealing inner ring (38) to play a dynamic sealing role; the outer ring at the outer side of the front end rotary supporting bearing (47) is positioned by a front cover (48), and the front cover (48) is connected with the outer sleeve (40) into a whole; the outer side of the rear end rotary supporting bearing (47) is positioned by a rear cover (36), and the outer ring of the inner ring is positioned by a rear positioning sleeve (35); the rear cover (36) is connected with the outer sleeve (40) into a whole, and the rear positioning sleeve (35) is connected with the outer rotating pipe (45) into a whole; the driving gear (13) is arranged on an output shaft of a rotary speed reducer (73) with a motor, and the driving gear (13) drives the driven gear (50) to rotate; the key (49) connects the driven gear (50) and the outer rotary pipe (45) into a whole, the outer side surface of the key is pressed and positioned by a round nut (51), and the inner side surface of the key is contacted and positioned with the outer side of the inner ring of the rotary supporting bearing (47) at the front end.

3. The flame gunning machine for the refractory lining of industrial furnace as claimed in claim 1, which is characterized in that: an oxygen pipe (60) and a fuel gas pipe (58) are arranged in the ignition gas distributor (69); oxygen is introduced from an oxygen pipe (60), passes through a distributor outer sleeve (62), enters an oxygen cavity of a gas distribution core (59), is uniformly distributed to each set, and is output from the outer layer of an ignition double-layer sleeve consisting of an ignition outer sleeve (18) and an ignition inner sleeve (19); gas is introduced from a gas pipe (58), passes through a distributor outer sleeve (62), enters a gas cavity of a gas distribution core (59), and is uniformly distributed to an ignition inner sleeve (19) of each double-layer sleeve for output; the distributor outer sleeve (62) is a non-rotating part, and the gas distribution core (59) and the rotary conveying outer sleeve (20) are connected into a whole and are rotating parts; the distributor outer sleeve (62) is movably matched with the gas distribution core (59) and is ensured by two sets of distributor bearings (54); a plurality of distributor seal rings (61) are used for dynamic sealing between the distributor outer sleeve (62) and the gas distribution core (59); a plurality of sets of ignition outer sleeves (18) are connected with an oxygen cavity of the gas distribution core (59) through transition sleeves (63), and a plurality of sets of ignition inner sleeves (19) are connected with a gas cavity of the gas distribution core (59); the two sets of distributor bearings (54) are separated by the isolating sleeve (55), the inner ring of the distributor bearing (54) on the outer side is pressed by the rear end cover (53), and the rear end cover (53) is pressed by the pressing nut (52) through threaded fit with the gas distribution core (59), so that the axial positioning of the two sets of distributor bearings (54) relative to the gas distribution core (59) is determined; the positioning snap spring (56) is clamped in a clamping groove in the inner diameter of the distributor outer sleeve (62), and the relative axial momentum of the gas distribution core (59) and the distributor outer sleeve (62) is in a small range through the outer rings of the two sets of distributor bearings (54); the anti-rotation pipe (57) is rigidly connected with the outer sleeve (62) of the distributor, the anti-rotation pipe (57) is inserted into a hole of the anti-rotation frame (14), and the anti-rotation frame (14) is rigidly connected with the vertical plates (75) at two sides, so that the outer sleeve (62) of the distributor does not rotate along with the gas distribution core (59).