Spiral connection type blast furnace mud gun nozzle device capable of effectively prolonging service life

Abstract

The utility model discloses a spiral connection type blast furnace gun nozzle device capable of effectively prolonging the service life, which comprises a gun nozzle base, a gun nozzle cap connecting seat and a gun nozzle cap, and the cylindrical end of the gun nozzle base is provided with the gun nozzle cap connecting seat; one end of the gun nozzle cap connecting seat is fixedly connected with the gun nozzle base, and the other end is provided with the gun nozzle cap; the gun nozzle cap connecting seat is connected with the gun nozzle cap through a spiral buckle; and the gun nozzle cap connecting seat and the gun nozzle cap are positioned through a cylindrical positioning boss. The gun nozzle cap is made of the ZG35MnGrNi material, so that the hardenability, the strength, the toughness and the corrosion resistance are improved, and the impact resistance and the wear resistance are enhanced; the gun nozzle cap connecting seat and the gun nozzle cap are subjected to surface permeation high-temperature-resistant layer heat treatment, so that the wear resistance is further improved; the gun nozzle cap connecting base and the gun nozzle cap are connected through the spiral clamping groove and the spiral buckle, connection is stable and reliable, mounting and dismounting are convenient, and the mounting and dismounting time is shortened. The service life of the gun nozzle of the blast furnace gun can be effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, and further belongs to the technical field of ironmaking equipment, and specifically relates to a spirally connected blast furnace mud gun nozzle device which has simple structure, reliable operation, easy operation and can effectively increase service life. Background Art

[0002] At present, my country's steelmaking is mainly based on long-process steelmaking, that is, first blast furnace ironmaking, and then the molten iron is transported to the steelmaking plant for steelmaking. In the normal production process of the blast furnace, when a taphole is drained of molten iron, a mud gun is needed to press the plugging mud into the taphole to seal the taphole to ensure the normal smelting operation of the blast furnace. Mud gun is a key and important equipment in front of the furnace. When the mud gun seals the taphole, the gun nozzle is in direct contact with the mud sleeve and molten iron. The hydraulic mud gun in front of the blast furnace of the ironmaking plant is responsible for the important task of draining the molten iron and sealing the taphole. It is a key and important equipment in front of the furnace, and there must be no mistakes in daily work. Since the gun nozzle of the mud gun is in direct contact with the molten iron at the taphole, and the temperature of the taphole is very high, the material and loading and unloading requirements of the gun nozzle are very high. In addition, the speed of the mud gun when entering the gun is about 1.1m / s, and the weight of the mud gun is about 7900Kg, so when the mud gun nozzle contacts the mud sleeve, the impact force is very large. This requires that the material of the nozzle must be resistant to high temperatures and not easily deformed; the nozzle must also be easy to disassemble and assemble after bearing a huge impact force.

[0003] The gun nozzle currently used has the following shortcomings:

[0004] 1. The nozzle is made of ZG45, which has a short service life, and the average service life is generally 10 to 15 times.

[0005] 2. The nozzle is prone to plastic deformation after being subjected to huge impact force, high temperature and high pressure.

[0006] 3. The connection between the muzzle cap and the muzzle body is not designed properly, making disassembly very inconvenient. It takes about 15 minutes to disassemble a muzzle.

[0007] 4. The nozzle is easily washed and burned by molten iron. If the taphole is blocked after burning, mud leakage may occur at the least, and the taphole may be unable to be blocked at the worst, causing a large amount of iron leakage and equipment burning.

[0008] Therefore, the key to solve this problem is to research and develop a spirally connected blast furnace mud gun nozzle device which has simple structure, reliable operation, easy operation and can effectively prolong service life. Utility Model Content

[0009] The utility model aims to provide a spirally connected blast furnace mud gun nozzle device which has simple structure, reliable operation, easy operation and can effectively prolong service life.

[0010] The purpose of the utility model is achieved in this way, comprising a nozzle base, a nozzle cap connecting seat, and a nozzle cap, wherein the cylindrical end of the nozzle base is provided with a nozzle cap connecting seat; one end of the nozzle cap connecting seat is fixedly connected to the nozzle base, and the other end is provided with a nozzle cap; the nozzle cap connecting seat and the nozzle cap are connected by a spiral buckle; the nozzle cap connecting seat and the nozzle cap are positioned by a cylindrical positioning boss.

[0011] The utility model consists of a nozzle base, a nozzle cap connecting seat and a nozzle cap; a spiral groove is arranged on the outer cylindrical surface of the nozzle cap connecting seat, and a spiral buckle is arranged on the nozzle cap; the nozzle cap connecting seat and the nozzle cap are clamped and connected through the spiral groove and the spiral buckle; the nozzle cap is made of ZG35MnGrNi material, which appropriately reduces the hardness, improves the hardenability, strength, toughness and corrosion resistance, and enhances the impact resistance and wear resistance; the nozzle cap connecting seat and the nozzle cap are subjected to surface penetration and high temperature resistant layer heat treatment to further improve the wear resistance; the nozzle cap connecting seat and the nozzle cap are connected through the spiral groove and the spiral buckle, which is not only firmly and reliably connected, but also convenient for installation and disassembly, and shortens the installation and disassembly time.

[0012] The utility model has a service life of more than 100 times, which effectively improves the service life; the disassembly and assembly is simple and convenient, and the original disassembly and assembly of a gun nozzle takes about 15 minutes, which is reduced to less than 10 minutes now, thereby improving work efficiency; reducing the amount of spare parts and saving production costs.

[0013] The utility model has the advantages of simple structure, reliable operation and convenient operation, and can effectively prolong the service life of the blast furnace mud gun nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the nozzle cap connection seat of the utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of the left side;

[0017] Figure 4 This is a schematic diagram of the gun nozzle cap of the utility model;

[0018] Figure 5 for Figure 4 The right side schematic diagram;

[0019] Figure 6 This is a schematic diagram of the overall structure of the original gun nozzle;

[0020] Figure 7 This is a schematic diagram of the original gun nozzle cap;

[0021] Figure 8for Figure 7 AA cross-sectional view.

[0022] In the figure: 1-nozzle base, 101-nozzle base body, 102-fixing pin hole, 2-nozzle cap connecting seat, 201-nozzle cap connecting seat body, 202-spiral slot, 203-cylindrical positioning boss, 3-nozzle cap, 301-nozzle cap body, 302-disassembly hole, 303-spiral buckle, 304-positioning hole, 4-weld, 5-original nozzle body, 6-original nozzle cap, 7-anti-drop buckle, 8-disassembly rod, 9-original fixing pin hole, 10-slot. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes made based on the teachings of the present invention fall within the protection scope of the present invention.

[0024] like Figures 1 to 8 As shown, the utility model includes a gun nozzle base 1, a gun nozzle cap connecting seat 2, and a gun nozzle cap 3. The gun nozzle cap connecting seat 2 is provided at the cylindrical end of the gun nozzle base 1; one end of the gun nozzle cap connecting seat 2 is fixedly connected to the gun nozzle base 1, and the other end is provided with the gun nozzle cap 3; the gun nozzle cap connecting seat 2 and the gun nozzle cap 3 are connected by a spiral buckle; the gun nozzle cap connecting seat 2 and the gun nozzle cap 3 are positioned by a cylindrical positioning boss.

[0025] The nozzle base 1 is welded to the nozzle cap connecting seat 2.

[0026] The material of the muzzle cap connecting seat 2 is ZG45.

[0027] The muzzle cap connection seat 2 is subjected to surface penetration heat treatment of a high temperature resistant layer, and the thickness of the penetration layer is about 0.5 mm.

[0028] The material of the muzzle cap 3 is ZG35MnGrNi.

[0029] The nozzle cap 3 is subjected to surface penetration heat treatment of a high temperature resistant layer, and the thickness of the penetration layer is about 0.5 mm.

[0030] The muzzle cap connection seat 2 includes a muzzle cap connection seat body 201, a spiral groove 202, and a cylindrical positioning boss 203; a spiral groove 202 is arranged on the cylindrical surface outside the muzzle cap connection seat body 201; a cylindrical positioning boss 203 is arranged at one end of the muzzle cap connection seat body 201.

[0031] The muzzle cap 3 includes a muzzle cap body 301, a disassembly hole 302, a spiral buckle 303, and a positioning hole 304; a spiral buckle 303 is provided at one end of the muzzle cap body 301, and a disassembly hole 302 is provided at the other end; a positioning hole 304 is provided inside the muzzle cap body 301.

[0032] The spiral angle of the spiral buckle 303 is adapted to the spiral angle of the spiral groove 202 .

[0033] The size of the positioning hole 304 is adapted to the size of the cylindrical positioning boss 203 .

[0034] The working principle and working process of this utility model:

[0035] The utility model is composed of a nozzle base 1, a nozzle cap connecting seat 2, and a nozzle cap 3; a spiral groove 202 is arranged on the outer cylindrical surface of the nozzle cap connecting seat 2, and a spiral buckle 303 is arranged on the nozzle cap 3; the nozzle cap connecting seat 2 and the nozzle cap 3 are clamped and connected through the spiral groove 202 and the spiral buckle 303; the nozzle cap 3 is made of ZG35MnGrNi material, which appropriately reduces the hardness, improves the hardenability, strength, toughness and corrosion resistance, and enhances the impact resistance and wear resistance; the nozzle cap connecting seat 2 and the nozzle cap 3 are subjected to surface penetration and high temperature resistant layer heat treatment to further improve the wear resistance; the nozzle cap connecting seat 2 and the nozzle cap 3 are connected through the spiral groove 202 and the spiral buckle 303, which is not only firmly and reliably connected, but also convenient for installation and disassembly, thereby shortening the installation and disassembly time.

Claims

1. A spirally connected blast furnace mud gun nozzle device capable of effectively improving service life, comprising a gun nozzle base (1), a gun nozzle cap connecting seat (2), and a gun nozzle cap (3), wherein: A muzzle cap connecting seat (2) is arranged at the cylindrical end of the muzzle base (1); one end of the muzzle cap connecting seat (2) is fixedly connected to the muzzle base (1), and the other end is arranged with a muzzle cap (3); the muzzle cap connecting seat (2) and the muzzle cap (3) are connected by a spiral buckle; the muzzle cap connecting seat (2) and the muzzle cap (3) are positioned by a cylindrical positioning boss.

2. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 1 is characterized in that: The nozzle base (1) is welded to the nozzle cap connecting seat (2).

3. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 1 is characterized in that: The material of the muzzle cap connecting seat (2) is ZG45.

4. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 1 is characterized in that: The nozzle cap connection seat (2) is subjected to surface penetration heat treatment of a high temperature resistant layer, and the thickness of the penetration layer is about 0.5 mm.

5. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 1 is characterized in that: The material of the muzzle cap (3) is ZG35MnGrNi.

6. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 1 is characterized in that: The nozzle cap (3) is subjected to surface penetration heat treatment to form a high temperature resistant layer, and the thickness of the penetration layer is about 0.5 mm.

7. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 1 is characterized in that: The muzzle cap connection seat (2) comprises a muzzle cap connection seat body (201), a spiral groove (202), and a cylindrical positioning boss (203); the spiral groove (202) is arranged on the outer cylindrical surface of the muzzle cap connection seat body (201); and the cylindrical positioning boss (203) is arranged at one end of the muzzle cap connection seat body (201).

8. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 1 is characterized in that: The muzzle cap (3) comprises a muzzle cap body (301), a disassembly hole (302), a spiral buckle (303), and a positioning hole (304); one end of the muzzle cap body (301) is provided with a spiral buckle (303), and the other end is provided with a disassembly hole (302); the positioning hole (304) is provided inside the muzzle cap body (301).

9. The spirally connected blast furnace mud gun nozzle device capable of effectively improving the service life according to claim 7 or 8, characterized in that: The spiral angle of the spiral buckle (303) is adapted to the spiral angle of the spiral groove (202).

10. The spirally connected blast furnace mud gun nozzle device capable of effectively improving service life according to claim 8, characterized in that: The size of the positioning hole (304) is adapted to the size of the cylindrical positioning boss (203).

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