Converter trunnion protection device

Abstract

The utility model discloses a converter trunnion protection device, and belongs to the technical field of metallurgical equipment. The connecting part comprises a backing ring, a protective cover and a protective device; the backing ring is arranged in the protective cover, the backing ring is fixedly connected with a converter main body located in the protective cover, and trunnions extending to the outside of the protective cover are arranged on the two sides of the backing ring. According to the converter trunnion protection device, the upper protection plate and the lower protection plate are combined, when high-temperature steel slag is splashed out of the converter body, the splashed-out high-temperature steel slag and the converter body are blocked through the upper protection plate and the lower protection plate, the steel slag is prevented from making direct contact with the trunnion, and the service life of the trunnion is prolonged; and when the steel slag is splashed out through a gap between the protective cover and the trunnion, the upper baffle and the lower baffle can conduct blocking, the steel slag is prevented from making contact with the bearing assembly, and damage to the bearing assembly caused by high-temperature steel slag making contact with a rubber seal of the bearing assembly is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical equipment, in particular to a converter trunnion protection device. Background Art

[0002] A converter is a piece of equipment used in steelmaking. Its working principle is to convert molten iron into molten steel through oxygen blowing. During the converter smelting process, a large amount of oxygen is blown into the furnace, oxidizing the carbon in the molten iron to produce large amounts of CO gas. When the reaction is intense, large amounts of hot slag overflow from the furnace mouth.

[0003] At present, the high-temperature steel slag splashed out from the converter during the smelting process will flow along the skirt plate to the ear shaft, and contact the bearing assembly through the gap between the protective plate and the ear shaft, causing wear on the ear shaft and affecting the service life of the ear shaft.

[0004] For example, in a Chinese patent with publication number CN205313592U, a slag protection device for the ear shaft of a converter is provided, including a "V"-shaped plate with an opening facing downward fixed on the upper surface of the furnace cover on the inner side of the symmetrical dangerous slag outer edge of the furnace cover, and the spacing between the two lower edges of the "V"-shaped plate of the cover is greater than the diameter of the inner shaft section of the ear shaft; the V-shaped plate is used to guide the falling slag, and cooperate with the protective cover to guide the high-temperature steel slag to protect the ear shaft. However, during the smelting process of the converter, the direction of the high-temperature steel slag ejection is relatively random, and it is inevitable that the high-temperature steel slag will contact the bearing assembly through the gap between the protective plate and the ear shaft, causing the steel slag adhered to the protective cover to wear the ear shaft, and the high-temperature steel slag will contact the rubber seal of the bearing assembly to cause it to be damaged, and impurities will enter the bearing from the damaged part, aggravating the internal wear of the bearing, seriously affecting the service life of the bearing, and other problems.

[0005] In view of the above situation, it is necessary to provide a converter ear shaft protection device, which can block the gap between the protective plate and the ear shaft, prevent high-temperature steel slag from wearing the ear shaft and high-temperature steel slag from entering the bearing and causing damage to the bearing, thereby achieving the effect of protecting the ear shaft and bearing. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a converter trunnion protection device.

[0007] The technical solution of the utility model is: a converter trunnion protection device, a support ring, a protective cover and a protective device; the support ring is arranged inside the protective cover, and the support ring is fixedly connected to the converter body located inside the protective cover, and trunnions extending to the outside of the protective cover are provided on both sides of the support ring, the support ring is rotatably connected to the protective cover through the trunnions on both sides, and the trunnions on both sides are respectively arranged in corresponding bearing assemblies, and the protective device is provided at both ends of the support ring; the protective device includes an upper protective plate and a lower protective plate, and the upper protective plate and the lower protective plate are A positioning assembly is provided at the joint, and connection holes compatible with the ear shaft are provided inside the upper protective plate and the lower protective plate; an upper connecting plate capable of being connected to the support ring is fixedly installed at one end of the upper protective plate, and an upper baffle capable of blocking high-temperature steel slag from the ear shaft is fixedly installed at the other end of the upper protective plate, a lower connecting plate capable of being connected to the support ring is fixedly installed at one end of the lower protective plate, and a lower baffle capable of blocking high-temperature steel slag from the ear shaft is fixedly installed at the other end of the lower protective plate, and a fixing assembly is provided at the joint of the upper baffle and the lower baffle.

[0008] Furthermore, the vertical cross-sections of the upper protective plate and the lower protective plate are both semicircular, and the upper connecting plate and the lower connecting plate are both connected to one side of the support ring by bolts.

[0009] Furthermore, the positioning assembly includes an upper assembly plate arranged on both sides of the upper protective plate and a lower assembly plate arranged on both sides of the lower protective plate. A plurality of positioning rods are arranged on the lower assembly plate at intervals along the length direction of the upper protective plate. Positioning holes are provided inside the upper assembly plate for use with the positioning rods, and the surface of the positioning rods is provided with threads.

[0010] Furthermore, the fixing assembly includes mounting blocks provided on both sides of the lower baffle and mounting grooves opened on both sides of the upper baffle, and the bottoms of the mounting grooves extend to the surface of the upper baffle.

[0011] Furthermore, a thread groove is transversely provided inside the mounting block, and a threaded hole is provided on the end surface of the upper baffle at the position of the thread groove.

[0012] Furthermore, a rotation groove for the ear shaft to rotate is opened inside the protective cover, and the upper baffle and the lower baffle constitute a protective part.

[0013] Furthermore, the protection portion is located outside the protection cover, and the diameter of the protection portion is larger than the diameter of the rotating groove.

[0014] Furthermore, the front of the protective cover is provided with an opening for loading and unloading materials.

[0015] Furthermore, the protective device includes an upper protective plate and a lower protective plate that are integrally arranged, and the protective device is welded and fixed to the support ring.

[0016] The beneficial technical effect of the present invention is as follows: the upper guard plate and the lower guard plate are placed on both sides of the support ring, and then the upper guard plate and the lower guard plate are merged through the positioning component, so that the positioning rod is inserted into the positioning hole inside the upper assembly plate for auxiliary positioning, and then the mounting block on the lower baffle is inserted into the mounting groove, and then the bolt is inserted into the threaded groove through the threaded hole, so that the upper baffle and the lower baffle are fixedly connected, and then the upper connecting plate and the lower connecting plate at one end of the upper guard plate and the lower guard plate are fixed to one side of the support ring. When high-temperature slag splashes out from the converter body, the upper guard plate and the lower guard plate will block the splashed high-temperature slag from the converter body. The upper baffle and the lower baffle are used to prevent the slag from directly contacting the ear shaft, thereby extending the service life of the ear shaft and ensuring that the converter body can perform normal smelting for a long time. The upper baffle and the lower baffle are provided to form a labyrinth seal with the protective cover, thereby sealing the high-temperature slag within the protective cover. When the slag splashes out through the gap between the protective cover and the ear shaft, the upper baffle and the lower baffle will block it to prevent the slag from contacting the bearing assembly, thereby avoiding the high-temperature slag from contacting the rubber seal of the bearing assembly and causing damage thereto, and avoiding the problem that impurities enter the bearing assembly through the damaged part, causing aggravated wear inside the bearing assembly and seriously affecting the service life of the bearing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic front view cross-sectional diagram of the structure of the present utility model;

[0018] Figure 2 It is an enlarged schematic diagram of the structure of the protective device of the utility model;

[0019] Figure 3 It is a schematic side cross-sectional view of the structure of the protective device of the utility model;

[0020] Figure 4 It is a schematic side sectional view of the structure of the fixing assembly of the utility model.

[0021] The numbers and letters in the figure represent the corresponding component names:

[0022] 1. Ear shaft; 2. Converter body; 3. Support ring; 4. Bearing assembly; 5. Protective cover; 6. Upper protective plate; 601. Upper connecting plate; 602. Upper assembly plate; 7. Lower protective plate; 701. Lower assembly plate; 702. Positioning rod; 703. Lower connecting plate; 8. Upper baffle; 801. Mounting groove; 9. Lower baffle; 901. Mounting block; 902. Threaded groove. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention. Example

[0024] See attached Figure 1-4 As shown, the converter ear shaft protection device of embodiment 1 includes: a support ring 3, a protective cover 5 and a protective device; the support ring 3 is arranged inside the protective cover 5, and the support ring 3 is fixedly connected to the converter body 2 located inside the protective cover 5, and ear shafts 1 extending to the outside of the protective cover 5 are provided on both sides of the support ring 3. The support ring 3 is rotatably connected to the protective cover 5 through the ear shafts 1 on both sides, and the ear shafts 1 on both sides are respectively arranged in corresponding bearing assemblies 4, and the protective devices are provided at both ends of the support ring 3.

[0025] During the steelmaking process of the converter body 2, liquid pig iron is first injected into the converter body 2, and then oxygen is blown into the converter body 2 by side blowing, top blowing or bottom blowing. The oxygen reacts with elements such as carbon and silicon in the molten iron to generate high temperature, which promotes the melting of the raw materials.

[0026] The protective device includes an upper protective plate 6 and a lower protective plate 7. The vertical cross-sections of the upper protective plate 6 and the lower protective plate 7 are both semicircular. The interiors of the upper protective plate 6 and the lower protective plate 7 are provided with connection holes adapted to the ear shaft 1.

[0027] The upper protective plate 6 and the lower protective plate 7 are arranged in a semicircular shape, so that the upper protective plate 6 and the lower protective plate 7 can each fit one side of the surface of the ear shaft 1 during installation, and then be connected and circularly sleeved on the surface of the ear shaft 1.

[0028] A positioning assembly is provided at the junction of the upper protective plate 6 and the lower protective plate 7. The positioning assembly includes an upper assembly plate 602 provided on both sides of the upper protective plate 6 and a lower assembly plate 701 provided on both sides of the lower protective plate 7. A plurality of positioning rods 702 are provided on the lower assembly plate 701 at intervals along the length direction of the upper protective plate 6. A positioning hole is provided inside the upper assembly plate 602 for cooperating with the positioning rod 702, and a thread is provided on the surface of the positioning rod 702.

[0029] By setting up a positioning device, when the upper protective plate 6 and the lower protective plate 7 are fitted on the surface of the ear shaft 1 and are ready to be docked, the transverse surfaces of the upper assembly plate 602 and the lower assembly plate 701 are fitted together, and then the positioning rod 702 on the lower assembly plate 701 passes through the upper assembly plate 602 through the positioning hole to achieve auxiliary positioning. At this time, the nut can be tightened to the upper assembly plate 602 through the thread on the surface of the positioning rod 702 for preliminary fixation.

[0030] One end of the upper protective plate 6 is fixedly installed with an upper connecting plate 601 that can be connected to the support ring 3, and one end of the lower protective plate 7 is fixedly installed with a lower connecting plate 703 that can be connected to the support ring 3. The upper connecting plate 601 and the lower connecting plate 703 are both connected to one side of the support ring 3 by bolts.

[0031] After the upper protective plate 6 and the lower protective plate 7 are initially fixed on the ear shaft 1, the upper protective plate 6 or the lower protective plate 7 is pushed horizontally so that the upper connecting plate 601 and the lower connecting plate 703 at one end of the upper protective plate 6 and the lower protective plate 7 are both fitted on one end of the support ring 3, and then the upper connecting plate 601 and the lower connecting plate 703 are fixed to the end face of the support ring 3 by bolts, so that the upper protective plate 6 and the lower protective plate 7 can be fixed. The annular cooperation of the upper protective plate 6 and the lower protective plate 7 can be used to protect the ear shaft 1. When only a small amount of silicon and manganese is left in the molten steel, carbon begins to oxidize to produce carbon monoxide, causing the molten steel to boil violently. In this process, some high-temperature slag will splash out. At this time, the upper protective plate 6 and the lower protective plate 7 will block the splashed high-temperature slag from the converter body 2, thereby avoiding the problem of the ear shaft 1 being damaged by the high-temperature slag, resulting in a shorter service life, and providing a guarantee for the converter body 2 to be able to smelt normally for a long time.

[0032] An upper baffle 8 capable of isolating the high-temperature steel slag from the ear shaft 1 is fixedly installed on the other end of the upper protective plate 6 , and a lower baffle 9 capable of isolating the high-temperature steel slag from the ear shaft 1 is fixedly installed on the other end of the lower protective plate 7 .

[0033] Since the splashing angle of high-temperature steel slag is relatively random, a single sleeve protection will cause a small amount of high-temperature steel slag to pop out through the gap between the protective cover 5 and the upper protective plate 6 and the lower protective plate 7. In order to cope with this situation, the upper baffle 8 and the lower baffle 9 are set to form a labyrinth seal between the protective cover 5 and the protective device to block the high-temperature steel slag, thereby achieving the effect of sealing the high-temperature steel slag in the protective cover 5, avoiding the high-temperature steel slag from contacting the rubber seal of the bearing assembly 4, causing damage to the rubber seal, and impurities entering the bearing assembly 4 from the damaged part of the rubber seal, resulting in increased wear inside the bearing assembly 4, seriously affecting the service life of the bearing assembly 4.

[0034] A fixing assembly is provided at the junction of the upper baffle 8 and the lower baffle 9, and the fixing assembly includes mounting blocks 901 provided on both sides of the lower baffle 9 and mounting grooves 801 opened on both sides of the upper baffle 8. The bottom of the mounting groove 801 extends to the surface of the upper baffle 8, and a threaded groove 902 is horizontally opened inside the mounting block 901, and a threaded hole is opened on the end face of the upper baffle 8 and at the position of the threaded groove 902.

[0035] When the upper protective plate 6 and the lower protective plate 7 are connected, the mounting block 901 on the lower baffle plate 9 is inserted into the mounting groove 801, and then the bolt is inserted into the threaded groove 902 through the threaded hole, so that the upper baffle plate 8 and the lower baffle plate 9 are assembled and fixed, and then the initial fixation of the positioning component is carried out to completely fix the upper protective plate 6 and the lower protective plate 7.

[0036] Furthermore, a rotation groove is provided inside the protective cover 5 for the ear shaft 1 to rotate. The upper baffle 8 and the lower baffle 9 form a protective part, which is located outside the protective cover 5 and has a diameter greater than the diameter of the rotation groove.

[0037] When the high-temperature steel slag pops out through the gap between the protective cover 5 and the protective device, the protective part can block the popped-out high-temperature steel slag, and the protective part is larger than the setting of the rotating trough, so that even if the high-temperature steel slag touches the upper protective plate 6 or the lower protective plate 7 and bounces up, the protective part has enough area to block the high-temperature steel slag, so that it cannot cross the protective plate to reach the bearing assembly 4, thereby providing protection. Example

[0038] According to Example 1, as shown in the attached Figure 1-4 As shown, the converter trunnion protection device includes: the protection device includes an upper protection plate 6 and a lower protection plate 7 which are integrally arranged, and the protection device is welded and fixed to the support ring 3.

[0039] By means of the upper protective plate 6 and the lower protective plate 7 integrally provided in the protective device, the protective device can be first sleeved on the surface of the ear shaft 1 through one end of the ear shaft 1 when the ear shaft 1 is installed during the converter case process, and then the protective device can be installed on the support ring 3 by bolts or welding, so as to freely choose according to different installation scenarios.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A converter trunnion protection device, characterized in that: include: Support ring (3), protective cover (5) and protective device; The support ring (3) is arranged inside the protective cover (5), and the support ring (3) is fixedly connected to the converter body (2) located inside the protective cover (5). Both sides of the support ring (3) are provided with ear shafts (1) extending to the outside of the protective cover (5). The support ring (3) is rotatably connected to the protective cover (5) through the ear shafts (1) on both sides, and the ear shafts (1) on both sides are respectively arranged in corresponding bearing assemblies (4). The protective device is provided at both ends of the support ring (3); The protective device comprises an upper protective plate (6) and a lower protective plate (7), a positioning assembly is provided at the junction of the upper protective plate (6) and the lower protective plate (7), and a connecting hole adapted to the ear shaft (1) is provided inside the upper protective plate (6) and the lower protective plate (7); One end of the upper protective plate (6) is fixedly mounted with an upper connecting plate (601) that can be connected to the support ring (3), and the other end of the upper protective plate (6) is fixedly mounted with an upper baffle (8) that can block the high-temperature steel slag from the ear shaft (1). One end of the lower protective plate (7) is fixedly mounted with a lower connecting plate (703) that can be connected to the support ring (3), and the other end of the lower protective plate (7) is fixedly mounted with a lower baffle (9) that can block the high-temperature steel slag from the ear shaft (1). A fixing component is provided at the junction of the upper baffle (8) and the lower baffle (9).

2. The converter trunnion protection device according to claim 1, characterized in that: The vertical cross-sections of the upper protective plate (6) and the lower protective plate (7) are both semicircular, and the upper connecting plate (601) and the lower connecting plate (703) are both connected to one side of the support ring (3) via bolts.

3. The converter trunnion protection device according to claim 1, characterized in that: The positioning assembly comprises an upper assembly plate (602) provided on both sides of the upper protective plate (6) and a lower assembly plate (701) provided on both sides of the lower protective plate (7); a plurality of positioning rods (702) are provided on the lower assembly plate (701) at intervals along the length direction of the upper protective plate (6); positioning holes for cooperating with the positioning rods (702) are provided inside the upper assembly plate (602); and the surface of the positioning rods (702) is provided with threads.

4. The converter trunnion protection device according to claim 1, characterized in that: The fixing assembly comprises mounting blocks (901) provided on both sides of the lower baffle (9) and mounting grooves (801) provided on both sides of the upper baffle (8), wherein the bottom of the mounting groove (801) extends to the surface of the upper baffle (8).

5. The converter trunnion protection device according to claim 4, characterized in that: A threaded groove (902) is transversely provided inside the mounting block (901), and a threaded hole is provided on the end surface of the upper baffle (8) at the position of the threaded groove (902).

6. The converter trunnion protection device according to claim 1, characterized in that: A rotation groove for the ear shaft (1) to rotate is provided inside the protective cover (5), and the upper baffle (8) and the lower baffle (9) form a protective portion.

7. The converter trunnion protection device according to claim 6, characterized in that: The protection portion is located outside the protection cover (5), and the diameter of the protection portion is larger than the diameter of the rotating groove.

8. The converter trunnion protection device according to claim 1, characterized in that: The front of the protective cover (5) is provided with an opening for loading and unloading materials.

9. The converter trunnion protection device according to claim 1, characterized in that: The protective device comprises an upper protective plate (6) and a lower protective plate (7) which are arranged in an integral manner, and the protective device is fixed to the support ring (3) by welding.

Images