CN212598856U

CN212598856U - Injection online nozzle baking device

Info

Publication number: CN212598856U
Application number: CN202020368537.4U
Authority: CN
Inventors: 崔炳刚; 陈俊; 王光磊; 赵华
Original assignee: Beijing Junheyue Technology Development Co ltd
Current assignee: Beijing Junheyue Technology Development Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2021-02-26
Anticipated expiration: 2030-03-20

Abstract

The utility model provides an injection online nozzle baking device, relating to the technical field of metallurgical equipment; comprises a baking box body and an ejector; the baking box body is provided with a baking cavity, a water inlet and a smoke outlet; the lower end of the baking box body is provided with a moving device; the eductor includes an eductor housing having a closed end and an open end; the shell of the ejector is provided with an air inlet cavity which is connected with a flue gas outlet through a flue gas interface; an ejector accelerating tube, an ejector mixing tube and an ejector re-accelerating tube are arranged in the ejector shell; the closed end is provided with a compressed air connecting pipe which extends into the interior of the ejector accelerating tube. The utility model has simple structure and convenient use; by applying the principle of the Laval pipe, the kinetic energy of the compressed air is fully utilized, the hot smoke of the tundish is guided to the water gap flowing at the maximum flow velocity, the rapid water gap baking is realized, and the baking temperature is improved. Compared with the traditional off-line baking, the off-line baking oven saves a large amount of energy and avoids the danger of scalding personnel.

Description

Injection online nozzle baking device

Technical Field

The utility model relates to a metallurgical equipment technical field specifically is an draw and penetrate online mouth of a river baking equipment.

Background

In the metallurgy continuous casting process, the tundish and the nozzle thereof need to be baked before use and can be used after being baked to a certain temperature, so that the service life of the nozzle and the smoothness of molten steel discharged from the nozzle are ensured.

At present, one of the common baking modes is to bake a plurality of water gaps at one time by using a box-type baking device, the water gaps are always in a baking state, and the water gaps are taken out to be directly arranged at the water gap positions of a tundish when the box-type baking device is required to be used. The baking device wastes energy, and meanwhile, a water gap needs to be manually conveyed to a water gap position by a fork for installation when in use, and the water gap has certain temperature, so that the baking device has danger of hurting people. The other common mode is that negative pressure is formed by blowing compressed air, flame in the tundish is led into the water gap, and the baking effect of the water gap is improved. However, this baking apparatus does not fully utilize the kinetic energy of the compressed air, and has a slow baking speed and a low baking temperature.

SUMMERY OF THE UTILITY MODEL

The utility model provides an draw and penetrate online mouth of a river baking equipment has solved the extravagant energy that mouth of a river baking equipment among the prior art exists, has easily taken place danger, or the problem that the baking speed is slow, the baking temperature is low.

The technical scheme of the utility model is realized like this:

an injection online nozzle baking device comprises a baking box body and an injector;

a baking cavity is formed in the baking box body, and a fireproof heat-insulating lining layer is arranged on the inner wall of the baking cavity; the top of the baking box body is provided with a water inlet which is communicated with the baking cavity;

a flue gas outlet is formed in the side wall of the baking box body and communicated with the baking cavity;

the lower end of the baking box body is provided with a moving device;

the ejector comprises an ejector shell, wherein the ejector shell is provided with a closed end and an open end opposite to the closed end; an air inlet cavity is formed in the ejector shell close to the closed end, a smoke interface is arranged on the ejector shell, and the smoke interface is communicated with the air inlet cavity; the smoke interface is connected with the smoke outlet;

an ejector accelerating tube, an ejector mixing tube and an ejector re-accelerating tube which are connected in sequence are arranged in the ejector shell; the ejector accelerating tube is positioned close to the air inlet cavity side, and the ejector re-accelerating tube is positioned close to the opening end side;

the ejector mixing pipe is a cylindrical pipe body; the ejector accelerating tube is a round table-shaped tube body, the large-caliber end of the ejector accelerating tube is communicated with the air inlet cavity, and the small-caliber end of the ejector accelerating tube is communicated with the ejector mixing tube; the ejector re-accelerating pipe is a circular truncated cone-shaped pipe body, the large-caliber end of the ejector re-accelerating pipe is positioned at the opening end, and the small-caliber end of the ejector re-accelerating pipe is communicated with the ejector mixing pipe;

the closed end is provided with a compressed air connecting pipe, and the compressed air connecting pipe extends into the accelerating pipe of the ejector.

Furthermore, the large-caliber end of the ejector accelerating tube is fixed on the inner wall of the ejector shell; the large-caliber end of the ejector reacceleration tube is fixed on the inner wall of the ejector shell, and the large-caliber end of the ejector reacceleration tube is flush with the opening end.

Furthermore, the ejector accelerating tube, the ejector mixing tube, the ejector re-accelerating tube and the compressed air connecting tube are coaxially arranged.

Further, an air hand valve is arranged on the compressed air connecting pipe and located outside the ejector shell.

Further, the flue gas interface is connected with the flue gas outlet through a flange.

Further, the mobile device is a caster, the lower end of the baking box body is provided with a mobile support, and the caster is arranged on the mobile support.

Further, toast the box and be cylindric, it is cylindric to toast the chamber.

Furthermore, the movable support is a square frame and is arranged on the outer side wall of the lower end of the baking box body.

The utility model has the advantages that:

the utility model has simple structure and convenient use; by applying the principle of the Laval pipe, the kinetic energy of the compressed air is fully utilized, the hot smoke of the tundish is guided to the water gap flowing at the maximum flow velocity, the rapid water gap baking is realized, and the baking temperature is improved. Compared with the traditional off-line baking, the off-line baking oven saves a large amount of energy and avoids the danger of scalding personnel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic top view of the embodiment of fig. 1.

Wherein:

1. baking the box body; 2. a water inlet; 3. a refractory heat insulating lining; 4. a flue gas outlet; 5. a caster wheel; 6. moving the support; 7. a compressed air connection pipe; 8. a flue gas interface; 9. an ejector housing; 10. an ejector acceleration tube; 11. an ejector mixing tube; 12. an ejector reacceleration tube; 13. a baking chamber; 14. a closed end; 15. an open end; 16. an air inlet cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, the injection online nozzle baking device in this embodiment includes a baking box 1 and an injector.

Toast the inside chamber 13 that toasts that has of box 1, in this embodiment, toast box 1 and be cylindric, it is cylindric also to toast chamber 13, it is provided with fire-resistant thermal-insulated lining 3 on the inner wall of chamber 13 to toast to avoid the heat to scatter and disappear, improve and toast the effect. The top of the baking box body 1 is provided with a water gap inlet 2, and the water gap inlet 2 is communicated with a baking cavity 13; the nozzle to be toasted can be placed into the toasting chamber 13 from the nozzle inlet 2. Be provided with exhanst gas outlet 4 on the lateral wall of toasting box 1, exhanst gas outlet 4 and toast chamber 13 intercommunication. The lower end of the baking box body 1 is provided with a moving device. In this embodiment, the moving device is a caster 5, and the caster 5 is a metal caster 5. The lower end of the baking box body 1 is provided with a movable support 6, and the caster 5 is arranged on the movable support 6. Here, the moving rack 6 is a square frame which is provided on the outer sidewall of the lower end of the roasting chamber body 1.

The eductor includes an eductor housing 9. the eductor housing 9 has a closed end 14 and an open end 15 opposite the closed end 14. Referring to fig. 2, the closed end 14 is located on the side close to the roasting tank 1, and the open end 15 is located on the side away from the roasting tank 1. An air inlet cavity 16 is formed in the ejector shell 9 and close to the closed end 14, a smoke interface 8 is arranged on the ejector shell 9, and the smoke interface 8 is communicated with the air inlet cavity 16. The flue gas interface 8 is connected with the flue gas outlet 4; in this embodiment, the flue gas interface 8 and the flue gas outlet 4 are connected by a flange.

And an ejector accelerating tube 10, an ejector mixing tube 11 and an ejector re-accelerating tube 12 which are connected in sequence are arranged in the ejector shell 9. The ejector accelerating tube 10 is positioned close to the air inlet cavity 16 side, and the ejector re-accelerating tube 12 is positioned close to the open end 15 side. The ejector mixing pipe 11 is a cylindrical pipe body. The ejector accelerating tube 10 is a circular truncated cone-shaped tube body, the large-caliber end of the ejector accelerating tube 10 is communicated with the air inlet cavity 16, and the small-caliber end of the ejector accelerating tube 10 is communicated with the ejector mixing tube 11. The ejector reacceleration tube 12 is a circular truncated cone-shaped tube body, the large-caliber end of the ejector reacceleration tube 12 is positioned at the opening end 15, and the small-caliber end of the ejector reacceleration tube 12 is communicated with the ejector mixing tube 11. In this embodiment, the large-caliber end of the accelerating tube 10 of the ejector is fixed on the inner wall of the ejector shell 9. The large-caliber end of the ejector reacceleration tube 12 is fixed on the inner wall of the ejector shell 9, and the large-caliber end of the ejector reacceleration tube 12 is flush with the opening end 15.

The closed end 14 is provided with a compressed air connecting pipe 7, and the compressed air connecting pipe 7 extends to the inside of the ejector accelerating tube 10. The compressed air connecting pipe 7 can inject compressed air into the ejector accelerating pipe 10. In this embodiment, be provided with the air hand valve on the compressed air takeover 7, the air hand valve is located the outside of ejector shell 9, is convenient for carry out manual control.

In this embodiment, the ejector accelerating tube 10, the ejector mixing tube 11, the ejector re-accelerating tube 12, and the compressed air connection tube 7 are coaxially disposed, so that a gas flow channel is smooth.

When this embodiment is used, this embodiment is moved to the below of mouth of a river through mobile device, puts the mouth of a river into toasting chamber 13 from mouth of a river entry 2. The compressed air connecting pipe 7 injects compressed air into the ejector accelerating pipe 10, and the compressed air is discharged after passing through the ejector accelerating pipe 10, the ejector mixing pipe 11 and the ejector re-accelerating pipe 12. The ejector accelerating tube 10, the ejector mixing tube 11 and the ejector re-accelerating tube 12 form a Laval tube, compressed air can be accelerated, so that a large negative pressure is formed at the air inlet cavity 16, hot smoke in a tundish connected with a water gap can be sucked out, the hot smoke is guided to the water gap flowing at the maximum flow velocity, rapid water gap baking is realized, and the baking temperature is increased. The sucked flue gas passes through the ejector accelerating tube 10, the ejector mixing tube 11 and the ejector re-accelerating tube 12 along with the compressed air and then is discharged. The principle of the Laval pipe is applied to the embodiment, the kinetic energy of the compressed air is fully utilized, and the rapid nozzle baking is realized. Compared with the traditional off-line baking, the off-line baking oven saves a large amount of energy and avoids the danger of scalding personnel.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection online nozzle baking device is characterized by comprising a baking box body and an injector;

the lower end of the baking box body is provided with a moving device;

2. The injection online nozzle baking device according to claim 1, wherein the large-caliber end of the injector accelerating tube is fixed on the inner wall of the injector shell; the large-caliber end of the ejector reacceleration tube is fixed on the inner wall of the ejector shell, and the large-caliber end of the ejector reacceleration tube is flush with the opening end.

3. The injection online nozzle baking device according to claim 2, wherein the injector accelerating tube, the injector mixing tube, the injector re-accelerating tube and the compressed air connecting tube are coaxially arranged.

4. The injection online nozzle baking device as claimed in claim 3, wherein an air hand valve is arranged on the compressed air connection pipe, and the air hand valve is located outside the injector housing.

5. The injection online nozzle baking device according to claim 1, wherein the flue gas interface and the flue gas outlet are connected by a flange.

6. The injection online nozzle baking device according to claim 1, wherein the moving device is a caster, a moving bracket is arranged at the lower end of the baking box body, and the caster is arranged on the moving bracket.

7. The induction type online nozzle baking device as claimed in any one of claims 1 to 6, wherein the baking box body is cylindrical, and the baking cavity is cylindrical.

8. The induction type online nozzle baking device as claimed in claim 6, wherein the movable bracket is a square frame which is arranged on the outer side wall of the lower end of the baking box body.