CN106191372B - A kind of oxygen rifle pipette tips - Google Patents

Abstract

The invention discloses an oxygen lance head, which comprises an oxygen delivery tube, an intermediate sleeve and an outer sleeve of the gun, an oxygen distribution plate is connected to the end of the oxygen delivery tube, a deflector is connected to the end of the intermediate sleeve, and the outer tube of the gun is The end of the sleeve is connected with the end cover of the gun head through the intermediate connector, and the end cover of the gun head is provided with an oxygen injection pipe connected with the oxygen distribution plate. The deflector is made of non-metallic material and its surface is streamlined; the guide The flow plate can reduce the water resistance it receives, effectively avoiding the problem of gun head burn-through caused by the local low-speed flow area; it can not only improve the cooling capacity of the gun head, increase the cooling uniformity of the gun head, but also further reduce the Manufacturing difficulty; Compared with the traditional oxygen lance tip, the oxygen lance tip has obvious advantages in improving the cooling strength of the lance tip and reducing the temperature of the tip end cover, and the cost of raw materials is lower, which will improve the life of the oxygen lance tip and reduce the Gun head cost is significant.

Description

An oxygen gun head

technical field

The invention belongs to the field of steelmaking, and in particular relates to an oxygen lance tip.

Background technique

In converter steelmaking, the oxygen lance tip injects oxygen into the converter molten pool for smelting operation. Reasonable oxygen lance tip design is very important for improving smelting effect and reducing smelting cost. The working environment of the oxygen lance tip is extremely harsh. There are extreme conditions such as high temperature, strong heat radiation, molten steel and slag splashing in the converter, which will affect the service life of the lance tip. As a key component of converter steelmaking, it is an urgent need for metallurgical enterprises to simplify the structure of the oxygen lance, increase the service life of the lance head, and reduce the cost of smelting.

Facing the harsh working environment, the existing oxygen lance tip is mainly made of copper with good thermal conductivity and manufactured by forging or casting, and at the same time cooperates with the cooling water in the gun to cool the tip; although copper with good thermal conductivity has been used, oxygen The gun tip is still easily damaged. One of the reasons for the damage of the gun head is that the design of the gun head deflector is unreasonable, which makes the distribution of water flow velocity near the wall of the gun head uneven, and local low-speed flow areas are prone to appear, resulting in local burn-through of the gun head. If the gun head deflector is designed to be streamlined, although the reasonable distribution of water flow velocity near the wall of the gun head is guaranteed, because the traditional deflector is a metal deflector, it is difficult to process and manufacture, and the production cost is high, so it is difficult to be used in practical projects. middle.

Contents of the invention

In view of this, the object of the present invention is to provide an oxygen lance tip with high cooling strength and low production cost.

In order to achieve the above object, the present invention provides the following technical solutions: an oxygen lance head, including an oxygen delivery tube, an intermediate sleeve and an outer casing of the gun that are sequentially arranged at intervals from the inside to the outside, and the end of the oxygen delivery tube is connected with a branch Oxygen plate, the end of the intermediate casing is connected with a deflector, the end of the outer sleeve of the gun is connected with a gun head end cover through an intermediate connector, and the gun head end cover is provided with an oxygen distribution plate connected to the oxygen injection pipe, the deflector is made of non-metallic material and its surface is streamlined.

Further, the deflector is made of one or more of nylon, PPSF/PPSU material, PC material, ULTEM9085 material and PC-ABS.

Further, the deflector is made by injection molding or 3D printing.

Further, the deflector is inserted on the intermediate sleeve through a slot.

Further, the deflector is bonded with the oxygen injection pipe passing through the deflector through high-temperature glue.

Further, the intermediate connector is made of copper-steel composite material.

Further, the intermediate connecting piece is made by die casting, and the copper-steel junction is serrated.

Further, the intermediate connecting piece is made by 3D printing.

Further, the oxygen injection pipe is also provided with an oxygen injection protection section.

Further, an anti-radiation coating is provided on the outer end surface of the tip end cover.

The beneficial effects of the present invention are:

The deflector in the oxygen lance head is designed in a streamlined shape, which can reduce the water resistance it receives, improve the uniformity of the water flow velocity distribution near the wall of the deflector, and effectively avoid the occurrence of local low-speed flow areas. The gun head burn-through problem; the deflector is made of non-metallic materials, which can not only improve the cooling capacity of the gun head, increase the cooling uniformity of the gun head, but also further reduce the manufacturing difficulty, thereby reducing the production cost.

The use of non-metallic materials with the characteristics of heat resistance, strong impact resistance, good flame retardancy, and good processing performance is not only conducive to the realization of injection molding or 3D printing, but also effectively solves the problem of high material costs and manufacturing costs, which are difficult to use Problems of engineering practice. Compared with the traditional oxygen lance tip, the oxygen lance tip has obvious advantages in improving the cooling strength of the lance tip and reducing the temperature of the tip end cover, and the cost of raw materials is lower, which will improve the life of the oxygen lance tip and reduce the cost of the tip have important meaning.

Description of drawings

In order to make the purpose, technical scheme and beneficial effect of the present invention clearer, the present invention provides the following drawings for illustration:

Fig. 1 is a structural representation of the present invention;

Figure 2 is a cloud diagram of the temperature distribution of the gun tip;

Figure 3 is the cloud diagram of the stress distribution of the gun head;

Fig. 4 is the cloud diagram of temperature distribution of the existing deflector nozzle end cover;

Fig. 5 is a cloud diagram of the temperature distribution of the nozzle end cover of the deflector in Example 1.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in the figure, the oxygen lance tip in the present invention includes an oxygen delivery tube 1, an intermediate casing 2, and a gun outer sleeve 3 arranged at intervals from the inside to the outside. Disc 4, the end of the middle casing 2 is connected with a deflector 5, and the end of the outer casing 3 of the gun is connected with a gun tip end cover 7 through an intermediate connector 6, and the gun tip end cover 7 is An oxygen injection pipe 8 communicating with the oxygen distribution plate 4 is provided, and the deflector 5 is made of non-metallic material and its surface is streamlined.

Specifically, the streamlined deflector 5 can reduce the water resistance it receives, improve the uniformity of water flow velocity distribution near the wall of the deflector, and effectively avoid the problem of burn-through of the gun tip caused by the local low-speed flow area ; The deflector 5 is made of non-metallic materials, which can not only improve the cooling capacity of the gun head, increase the cooling uniformity of the gun head, but also further reduce the manufacturing difficulty, thereby reducing the production cost.

As a further improvement of the above solution, the deflector 5 is made of one or more of durable nylon, PPSF/PPSU material, PC material, ULTEM9085 material and PC-ABS. This part of the material has the characteristics of heat resistance, strong impact resistance, good flame retardancy, and good processing performance; it is made by injection molding or 3D printing, which effectively solves the problem of high material and manufacturing costs and is difficult to use in engineering practice. , the industrial application of the streamlined deflector can be realized on a large scale without increasing the cost of the oxygen lance head.

As a further improvement of the above scheme, the deflector 5 is inserted into the middle casing 2 through a slot, and the deflector and the oxygen injection pipe passing through the deflector are bonded by high-temperature glue, which can effectively reduce the flow rate of the deflector. Difficulty installing board 5. In order to facilitate assembly, the flow deflector 5 can also be divided into multiple pieces to be manufactured. During assembly, each flow deflector is respectively loaded into the gun head and connected with each other by glue bonding.

As a further improvement of the above solution, the intermediate connector 6 is made of copper-steel composite material. Specifically, the intermediate connecting piece 6 can be made by die casting, and the junction of copper and steel is jagged when die casting is used; it can also be made by 3D printing. The extra intermediate connecting piece 6 can easily realize the on-site assembly of the gun head and the gun body. Gun outer sleeve 3 is welded. This method effectively solves the problems of difficulty in welding dissimilar materials of the torch head and torch body of copper and steel, and poor welding quality in the iron and steel plant, greatly reduces the difficulty of on-site welding of the torch head and torch body, and improves the connection strength and service life. In addition, the intermediate connector 6 can also be made into different specifications to solve the problem of shortening the length of the entire oxygen lance due to the shortening of the gun body caused by the replacement of the gun head during use.

As a further improvement of the above solution, the oxygen injection pipe 8 is also provided with an oxygen injection protection section. This oxygen injection protection section can be arranged on the oxygen injection pipe 8 outlet and the center is the boss of the straight pipe, also can be directly the straight pipe section that is arranged on the oxygen injection pipe 8 outlet, now the straight pipe section and the gun head end cover 7 All in one. When ablation occurs at the outlet cone section of the oxygen injection pipe 8 at the gun tip, due to the existence of the protection section, the ablation can first occur at this position, effectively protecting the outlet cone section of the oxygen injection pipe 8 from burning.

As a further improvement of the above solution, an anti-radiation coating is provided on the outer end surface of the tip end cover 7 . The coating can effectively reflect the radiated heat of molten steel, fundamentally reduce the energy obtained by the gun head, and reduce the temperature of the gun head.

Embodiment 1 (taking 120T converter oxygen lance as example)

The operating temperature of the deflector in the oxygen lance head is low, generally speaking, the working temperature is less than 55°C, and the temperature distribution of the deflector is shown in Figure 2; Subject to almost the same hydrostatic pressure, the stress distribution is shown in Figure 3. Therefore, under the premise of meeting the strength and heat resistance requirements, the metal deflector can be replaced by a non-metallic deflector that is easy to process and form.

The traditional metal deflector is replaced with a streamlined non-metallic deflector. Through numerical calculation, the maximum temperature of the oxygen lance head end cover adopting the above technical scheme is about 151°C, which is 193°C higher than the maximum temperature of the traditional oxygen lance end cover. ℃ has been reduced by 21.7%; the average temperature of the oxygen lance tip end cover with the above-mentioned technical scheme is about 74 °C, which is 21.2% lower than the average temperature of the traditional oxygen lance tip end cover of 94 °C; the technical gun tip and the traditional gun tip The cloud maps of temperature distribution are shown in Fig. 4 and Fig. 5.

If the deflector is made of PC material with high strength, high temperature resistance, impact resistance and bending resistance, and the traditional deflector is made of steel material, at this time, compared with the traditional nozzle of this technology, the cost of raw materials per unit volume of the deflector It can be reduced by 70%-80%.

Therefore, compared with the traditional oxygen lance tip, the oxygen lance tip of this patent has obvious advantages in improving the cooling strength of the lance tip and reducing the temperature of the tip end cover, and the cost of raw materials is lower, which will improve the life of the oxygen lance tip and reduce the Gun head cost is significant.

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in terms of form and Various changes may be made in the details without departing from the scope of the invention defined by the claims.

Claims (6)

1. a kind of oxygen rifle pipette tips, including spaced oxygen cathete, intermediate casing and gun body outer tube sleeve successively from the inside to the outside, it is described Oxygen cathete end point is connected with a point oxygen disk, and the intermediate casing end point is connected with deflector, the gun body outer tube sleeve end point Pipette tips end cap is connected with by intermediate connector, the pipette tips end cap is equipped with the jetting oxygen tube with dividing oxygen disk to be connected, its feature It is：The deflector is made of nonmetallic materials and its surface is streamlined；The intermediate connector is Copper steel cladding material； The intermediate connector is made of compression casting, and copper steel joint is zigzag；Spray oxygen is additionally provided with the jetting oxygen tube to protect Protect section；The pipette tips end cap outer end face is equipped with antiradiation coating.

2. oxygen rifle pipette tips according to claim 1, it is characterised in that：The deflector by nylon, PPSF/PPSU materials, One or more in PC materials, ULTEM9085 materials and PC-ABS are made.

3. oxygen rifle pipette tips according to claim 1, it is characterised in that：The deflector is using injection moulding or 3D printing system Into.

4. oxygen rifle pipette tips according to claim 1, it is characterised in that：The deflector is inserted into intermediate casing by slot On.

5. oxygen rifle pipette tips according to claim 1, it is characterised in that：The deflector and through between the jetting oxygen tube of deflector Pass through high temperature glue sticking.

6. oxygen rifle pipette tips according to claim 1, it is characterised in that：The intermediate connector is made of 3D printing.