CN205662537U - Multi -functional rifle on efflux type tied in a bundle - Google Patents

Abstract

The utility model discloses a multi -functional rifle on efflux type tied in a bundle, including the rifle body and shower nozzle, the central point department of putting is through precision finishing shaping aerobic gas spurt on the shower nozzle, there are combustion -supporting oxygen orifice, gas orifice and water cooling channel in oxygen orifice outer lane shaping in proper order, the lavalle hole of oxygen orifice for having shrink, distensibility ability. The shower nozzle adopts high -quality purple copper processing to form, and interior tissue is fine and close, has good heat conductivity, can also prevent to glue the steel, the utility model discloses can adopt scientific calculation to design reasonable structure, the manufacturing of adopting common processing means and processing technology to realize the product, the size of shower nozzle and the performance of main structure and shower nozzle are close international most advanced level, low in manufacturing cost.

Description

A cluster jet type multifunctional top gun

technical field

The utility model belongs to the technical field of baking gun design for RH refining furnaces, and in particular relates to a cluster jet type multifunctional top gun.

Background technique

The multi-functional top gun is a kind of baking gun used on the steelmaking furnace. It is an important mechanical equipment for molten steel vacuum refining (RH method). Spray CaF2 and other multifunctional aspects.

At present, the top gun used in domestic metallurgical equipment is the traditional Laval nozzle structure. After the oxygen is sprayed out, if the design is unreasonable or the medium parameter adjustment does not match, it will often cause defects such as low oxygen utilization rate and insufficient impact depth. The main root of the above defects is that the length of the oxygen jet beam is relatively short, and it is difficult to impact the molten steel surface.

Cluster jet multifunctional top gun is a new type of top gun developed in recent years. This kind of top gun is a technology that applies the principle of gas mechanics and adds an accompanying flow system to the traditional top gun to greatly slow down the attenuation speed of the oxygen jet and form an oxygen jet similar to a laser beam. This kind of jet has concentrated energy and strong penetrating ability. It has very obvious effects on promoting steel slag reaction, uniform molten steel composition and temperature, reducing splashing, improving oxygen utilization rate, and increasing metal yield. Due to the enhancement of the penetrating ability, the position of the top gun can be appropriately increased during refining, so the consumption of the top gun can be reduced. This technology has achieved the obvious effect of reducing the cost by nearly 50 yuan per ton of steel. The main benefits of applying the cluster jet top gun to the steelmaking furnace are as follows: (1) Due to the increase of the decarburization speed, the production operation rate is improved. (2) Due to the reduction of splashing and the reduction of iron content in the slag, the metal yield is increased, the steel output is increased, and the maintenance cost of the vacuum furnace is reduced at the same time. (3) Due to the reduction of the endpoint [O] in the steel, the consumption of aluminum for deoxidation is reduced. (4) Due to the improvement of the gun position and the reduction of splash, the life of the top gun is improved.

The cluster jet top gun is an extremely important process part. The whole system consists of three parts: the main oxygen injection system, the main oxygen protection system and the water cooling system. The main oxygen system is located in the center of the cluster jet gun; the main oxygen protection system is located in the main oxygen The outer layer of the injection system is equipped with epoxy and ring gas nozzles; the water cooling system is located on the outermost layer of the top gun, and there is a water inlet and a water outlet at one end of the top gun; the gun body is composed of four sleeves made of seamless steel pipes . The main oxygen system supplies oxygen to the molten pool at a supersonic speed of Ma=2, and the epoxy protects the supersonic jet at a speed of 8m ³ /min to ensure that the supersonic jet enters the molten pool compactly, coherently and effectively, while providing secondary combustion oxygen.

The cluster jet multifunctional gun with this structure has the function of preheating the burner of scrap steel, the function of blowing oxygen to cut scrap steel, the function of blowing oxygen to decarburize and raise the temperature of the molten pool, and the function of spraying carbon powder to create foam slag etc. At present, the cluster jet guns used in domestic metallurgical equipment have long relied on imports. Therefore, the design and production of cluster jet guns will be a difficult problem that needs to be overcome urgently.

Therefore, in view of the above problems, it is necessary to propose a new type of multifunctional top gun, which uses the usual processing methods and processing techniques to realize the manufacture of the product. The size and main structure of the nozzle and the performance of the nozzle are close to the international advanced level, and the processing technology Convenience and cost reduction.

Utility model content

In view of this, the utility model provides a cluster jet type multifunctional top gun, by designing the structure of the top gun, and adopting the usual processing means and processing technology to realize the manufacture of the product, so that the size of the nozzle and the main The structure and performance of the nozzle are close to the international advanced level, the processing technology is convenient and the cost is reduced.

According to the purpose of this utility model, a cluster jet type multi-functional top gun is proposed, which includes a gun body and a spray head, and the center position of the spray head is formed with an oxygen spray hole through precision machining, and the outer ring of the oxygen spray hole is formed sequentially. Combustion-supporting oxygen nozzles, gas nozzles and water cooling passages, the oxygen nozzles are Laval holes with contraction and expansion properties.

Preferably, the nozzle is made of red copper.

Preferably, the combustion-supporting oxygen injection holes and the gas injection holes are distributed around the oxygen injection holes in an annular array.

Preferably, the combustion-supporting oxygen injection hole and the gas injection hole are formed by reaming.

Preferably, the oxygen injection hole is composed of at least two sections of through-holes, including a contraction section and an expansion section, the diameter of the through-holes in the contraction section gradually decreases from the end to the front end, and the diameter of the expansion section gradually increases from the end to the front end.

Preferably, a horizontal transition section is also provided at the connection between the contraction section and the expansion section.

Preferably, both the combustion-supporting oxygen injection hole and the gas injection hole are arranged parallel to the oxygen injection hole.

The utility model discloses a cluster jet type multifunctional top gun, the structure of which is an optimized solution obtained through calculation, and the purpose of the utility model is achieved through the following technical solutions:

The nozzle is made of high-quality red copper, the internal structure is dense, it has excellent thermal conductivity, and it can also prevent steel from sticking. The Laval hole in the center of the nozzle is an oxygen injection hole, which is the main oxygen hole. It requires high precision and is made by precision machining. The combustion-supporting oxygen nozzle and gas nozzle are made of special reamers, and the remaining layers of medium pipes are made of high-quality stainless steel pipes and welded with the nozzle. The whole set of top guns requires smooth access and excellent welding quality.

The beneficial effects of the utility model are mainly reflected in:

1) The utility model can use scientific calculations to design a reasonable structure, and use common processing methods and processes to realize product manufacturing. The size and main structure of the nozzle and the performance of the nozzle are close to the international advanced level.

2) The manufacturing cost of the utility model is low, a large amount of foreign exchange can be saved, and the qualified rate of the product is high.

3) This product is used in major steel mills with good results.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is a sectional view of the multifunctional top gun.

Figure 2 is a left view of the multifunctional top gun.

The names of the corresponding parts represented by numbers or letters in the figure:

1. Nozzle 11. Oxygen nozzle 12. Combustion-supporting oxygen nozzle 13. Gas nozzle 14. Water cooling channel 111. Contraction section 112. Expansion section 113. Transition section

detailed description

The cluster jet multi-function gun with traditional structure has the function of preheating the burner of scrap steel, the function of blowing oxygen to cut scrap steel, the function of blowing oxygen to decarburize and raise the temperature of the molten pool, and the function of spraying carbon powder to create foam slag, etc. At present, the cluster jet guns used in domestic metallurgical equipment have long relied on imports. Therefore, the design and production of cluster jet guns will be a difficult problem that needs to be overcome urgently.

Aiming at the deficiencies of the prior art, the utility model provides a cluster jet type multifunctional top gun. By designing the structure and composition of the top gun, and adopting the usual processing means and processing technology to realize the manufacture of the product, the spray head The size and main structure and the performance of the nozzle are close to the international advanced level, the processing technology is convenient and the cost is reduced.

The technical solutions of the present utility model will be clearly and completely described through specific embodiments below. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1 and Figure 2 together. As shown in the figure, a cluster jet multi-functional top gun includes a gun body and a nozzle 1. An oxygen nozzle hole 11 is formed at the center of the nozzle 1 through precision machining. The outer ring of the hole 11 is sequentially formed with a combustion-supporting oxygen injection hole 12, a gas injection hole 13, and a water-cooling channel 14, and the oxygen injection hole is a Laval hole with contraction and expansion properties.

The oxygen injection hole 11 is composed of at least two sections of through holes, including a contraction section 111 and an expansion section 112. The diameter of the through hole in the contraction section gradually decreases from the end to the front end, and the diameter of the expansion section gradually increases from the end to the front end. By restricting the structure of the oxygen nozzle, the oxygen entering the nozzle is first compressed and then released, effectively increasing the oxygen jet velocity.

Wherein, a horizontal transition section 113 is also provided at the junction of the contraction section and the expansion section. Realize the smooth transition and release of the airflow, and increase the jet speed.

The nozzle in the utility model adopts red copper material. The nozzle is made of high-quality copper, with dense internal structure, excellent thermal conductivity, and can prevent sticking to steel.

The Laval hole in the center of the nozzle is the oxygen nozzle hole, which is the main oxygen hole. It requires high precision and is made through precision machining. The stainless steel pipe is welded with the nozzle. The whole set of top guns requires smooth access and excellent welding quality.

The combustion-supporting oxygen injection holes 12 and the gas injection holes 13 are distributed around the oxygen injection holes in an annular array. The combustion-supporting oxygen injection hole and the gas injection hole are formed by reaming. The processing and molding are convenient, and the baking effect of the top gun is effectively improved by uniformly distributing the combustion-supporting oxygen nozzle holes and the gas nozzle holes.

The gas nozzle 13 is arranged on the outer ring of the combustion-supporting oxygen nozzle 12, and the two are evenly arranged. In the present embodiment, the preferred gas nozzle 13 is 10, and the combustion-supporting oxygen nozzle 12 is 8, both of which are connected with the oxygen nozzle. Center parallel set. The structural design is more compact, the volume of the nozzle is reduced, the gas mixing is more uniform, and the baking effect is improved. Wherein, the number of gas injection holes and combustion-supporting oxygen injection holes is set according to needs, and is not limited here.

The utility model discloses a cluster jet type multifunctional top gun, the structure of which is an optimized scheme obtained through calculation. The purpose of this utility model is achieved through the following technical solutions:

The nozzle is made of high-quality red copper, the internal structure is dense, it has excellent thermal conductivity, and it can also prevent steel from sticking. The Laval hole in the center of the nozzle is an oxygen injection hole, which is the main oxygen hole. It requires high precision and is made by precision machining. The combustion-supporting oxygen nozzle and gas nozzle are made of special reamers, and the remaining layers of medium pipes are made of high-quality stainless steel pipes and welded with the nozzle. The whole set of top guns requires smooth access and excellent welding quality.

The beneficial effects of the utility model are mainly reflected in:

1) The utility model can use scientific calculations to design a reasonable structure, and use common processing methods and processes to realize product manufacturing. The size and main structure of the nozzle and the performance of the nozzle are close to the international advanced level.

2) The manufacturing cost of the utility model is low, a large amount of foreign exchange can be saved, and the qualified rate of the product is high.

3) This product is used in major steel mills with good results.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A cluster jet type multi-functional top gun, characterized in that it comprises a gun body and a nozzle, the central position of the nozzle is formed with an oxygen injection hole through precision machining, and the outer ring of the oxygen injection hole is sequentially formed with combustion-supporting oxygen The nozzle hole, the gas nozzle hole and the water cooling channel, the oxygen nozzle hole is a Laval hole with contraction and expansion properties. 2. The cluster jet type multifunctional top gun according to claim 1, characterized in that the combustion-supporting oxygen injection holes and the gas injection holes are distributed around the oxygen injection holes in an annular array. 3. The cluster jet type multifunctional top gun according to claim 1, characterized in that, the oxygen injection hole is composed of at least two sections of through holes, including a contraction section and an expansion section, and the through hole of the contraction section is from the end to the front end The pore diameter decreases gradually, and the pore diameter of the expansion section gradually increases from the end to the front end. 4. The cluster jet type multifunctional top gun according to claim 3, characterized in that, a horizontal transition section is also provided at the junction of the contraction section and the expansion section. 5. The cluster jet type multifunctional top gun according to claim 1, characterized in that the combustion-supporting oxygen injection hole and the gas injection hole are both arranged in parallel with the oxygen injection hole.