A distributor annular sealing system

Abstract

The present invention relates to a charge distributor annular sealing system, belonging to the field of blast furnaces with charge distributors. The sealing system sets upper and lower sealing structures at the gap between a fixed chassis and a rotating cylinder, and relies on the elastic principle of a sealing plate in a curved annular structure to make the sealing end of the annular sealing plate in close contact with the surface of the sealing base, thereby greatly reducing the annular gap, reducing the consumption of nitrogen in the charge distributor box, effectively preventing high-temperature airflow and dust in the blast furnace from entering the charge distributor box, protecting the transmission structure inside the charge distributor, reducing the maintenance cost of the charge distributor, and increasing the service life of the charge distributor.

Description

Technical Field

[0001] The invention belongs to the field of blast furnaces with a charge distributor, and in particular relates to an annular sealing system for a charge distributor. Background Art

[0002] The working environment of the bellless top distributor of the ironmaking blast furnace is high in temperature and dusty. Figure 1 As shown, there is a large gap between the distributor rotating cylinder 3 and the fixed distributor shell 1, and the distributor box is connected to the furnace chamber of the blast furnace 4. The gas in the blast furnace 4 will enter the distributor box through the gap, causing the temperature inside the distributor box to be high, affecting the normal operation of the mechanical structure inside the box; and when the blast furnace condition is abnormal, material particles will also rush into the distributor box, causing wear of the transmission mechanism, thereby reducing the service life of the equipment.

[0003] At present, in order to prevent gas and material particles from entering the distributor box, the measures adopted are to continuously fill the box with nitrogen and reduce the sealing gap. However, due to the influence of mechanical transmission vibration, a too small sealing gap will cause the transmission to jam, and increasing the amount of nitrogen filled will result in high costs. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a distributor annular sealing system to prevent dust and material particles from entering the distributor box and reduce nitrogen consumption.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A distributor annular sealing system includes an upper sealing structure, which is placed at the upper position of the annular gap between the bottom plate of a rotating cylinder and a fixed chassis; the upper sealing structure is mainly composed of a support, a mounting bracket, a sealing plate and a sealing base, wherein the support is an annular structure, which is coaxially arranged on the upper end surface of the bottom plate of the rotating cylinder with the central axis of the distributor, the top of the support is connected to the mounting bracket of the annular structure, the upper end of the sealing plate of the annular structure is arranged on the mounting bracket, and the lower end of the sealing plate cooperates with the sealing base of the same annular structure, and the sealing base is correspondingly arranged on the upper end surface of the fixed chassis and coaxially with the central axis of the distributor.

[0007] Furthermore, the sealing plate is an arc ring with its lower end bent toward the central axis of the distributor. The upper end of the sealing plate is detachably connected to the mounting bracket through a connecting piece, and the lower end is a free end, which contacts the sealing base so that the sealing plate rotates around the central axis of the distributor with the rotating cylinder bottom plate.

[0008] Furthermore, the sealing plate is made of a metal or non-metal material having elasticity.

[0009] Furthermore, a sealing ring is provided on the top of the sealing base, and an annular rail matching with the sealing ring is correspondingly provided on the lower end of the sealing plate.

[0010] Furthermore, a ring rail with a groove structure is correspondingly arranged at the lower end of the sealing plate, and a floating sealing ring which is buckled in the ring rail is arranged on the sealing base.

[0011] Furthermore, it also includes a lower sealing structure, which is arranged at the lower position of the gap between the bottom plate of the rotating cylinder and the fixed chassis; the lower sealing structure is mainly composed of an inner ring plate and an outer ring plate, and the inner ring plate and the outer ring plate are both coaxially arranged with the central axis of the distributor, wherein the inner ring plate is arranged on the lower end surface of the bottom plate of the rotating cylinder, and the outer ring plate is correspondingly arranged on the lower end surface of the fixed chassis, and the inner ring plate and the outer ring plate cooperate to form a maze channel.

[0012] Furthermore, baffles are alternately arranged on the opposite wall surfaces of the inner ring plate and the outer ring plate to form a maze passage.

[0013] The beneficial effects of the present invention are:

[0014] The sealing system sets the upper and lower sealing structures at the gap between the fixed chassis and the rotating cylinder, and relies on the elastic principle of the sealing plate with a curved annular structure to make the sealing end of the annular sealing plate in close contact with the surface of the sealing base, thereby greatly reducing the annular gap, reducing the nitrogen consumption of the distributor box, effectively preventing the high-temperature airflow and dust in the blast furnace from entering the distributor box, protecting the transmission structure inside the distributor, reducing the maintenance cost of the distributor, and increasing the service life of the distributor. The upper sealing structure has a variety of structural forms to meet the needs of different levels of blast furnaces and blast furnace operating conditions.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the connection between the distributor and the blast furnace;

[0018] Figure 2 It is a schematic diagram of the structure of a distributor with an annular sealing system;

[0019] Figure 3 It is a structural schematic diagram of a contact type annular sealing system;

[0020] Figure 4 It is a schematic diagram of the structure of the labyrinth annular sealing system;

[0021] Figure 5 It is a structural schematic diagram of the floating annular sealing system.

[0022] Reference numerals:

[0023] Distributor shell 1, fixed chassis 2, rotating cylinder 3, rotating cylinder bottom plate 3a, blast furnace 4, support 5, mounting bracket 6, sealing plate 7, annular rail 7a, sealing base 8, sealing ring 8a, floating sealing ring 9, inner ring plate 10, convex teeth 10a, outer ring plate 11, nitrogen pipeline 12, convex teeth 11a, distributor center axis OO'. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] See also Figure 2 to Figure 5, is a distributor annular sealing system, including an upper sealing structure, which is placed at the upper position of the annular gap between the rotating cylinder bottom plate 3a and the fixed chassis 2; the upper sealing structure is mainly composed of a support 5, a mounting bracket 6, a sealing plate 7 and a sealing base 8, wherein the support 5 is an annular structure, which is coaxially arranged on the upper end surface of the rotating cylinder bottom plate 3a with the central axis OO' of the distributor, the top of the support 5 is connected with the mounting bracket 6 of the annular structure, the upper end of the sealing plate 7 of the annular structure is arranged on the mounting bracket 6, and the lower end of the sealing plate 7 is matched with the sealing base 8 of the same annular structure, and the sealing base 8 is correspondingly arranged on the upper end surface of the fixed chassis 2 and coaxially with the central axis OO' of the distributor.

[0028] By setting an upper sealing structure at the upper position of the annular seam, the upper end of the sealing plate 7 is closely connected with the mounting bracket 6, the support 5, the mounting bracket 6 and the sealing plate 7 rotate OO' around the central axis of the distributor together with the rotating cylinder 3, and the lower end of the sealing plate 7 contacts the sealing base 8 to achieve (sealed) cooperation, and each part cooperates with each other to isolate the distributor housing 1 and the rotating cylinder 3 into a closed space. Under the isolation effect of the upper sealing structure, when the nitrogen pipeline 12 is connected to the distributor housing 1, the nitrogen only enters the closed space, thereby reducing the consumption of nitrogen.

[0029] In this solution, the sealing plate 7 is an arc-surface ring with the lower end bent toward the central axis OO' of the distributor. The sealing plate is set as a curved annular plate. Even if the nitrogen entering the distributor box enters the blast furnace from the narrow gap between the sealing plate 7 and the sealing base 8, it can suppress the high-temperature airflow in the blast furnace, thereby maintaining the working temperature in the distributor box at a normal state; in addition, it can also prevent dust and material particles from entering the distributor box. The upper end of the sealing plate 7 is detachably connected to the mounting bracket 6 through a connector (such as a bolt), and the lower end is a free end in contact with the sealing base 8. Such a structural setting is not only convenient for installation, but also convenient for maintenance and replacement, which is conducive to ensuring its airtight reliability.

[0030] Preferably, the sealing plate 7 is made of a metal or non-metal material having elasticity.

[0031] like Figure 4 As shown, two sealing rings 8a are fixedly arranged on the top of the sealing base 8, and the lower end of the sealing plate 7 is correspondingly fixedly provided with an annular track 7a that matches the sealing ring 8a. The sealing ring 8a here is a convex boss structure, and at this time, the annular track 7a is a groove structure that matches the boss. In this way, the free end of the sealing plate 7 and the sealing base 8 can cooperate to form a maze structure, thereby increasing the resistance of the high-temperature airflow of the blast furnace entering the distributor box. Of course, the sealing ring 8a can also be a concave groove structure, and at this time the annular track 7a is a boss structure that matches the groove. This setting not only has reliable contact and cooperation, but also forms a maze structure inside, ensuring the airtight reliability here.

[0032] It should be noted that, in addition to the above-mentioned labyrinth ring structure, the cooperation between the free end of the sealing plate 7 and the sealing base 8 may also adopt a contact seal or a floating seal structure. Figure 5 It is a floating seal structure: the annular rail 7a fixed at the free end of the sealing plate 7 is an annular groove, the notch of the groove faces downward; the upper end surface of the sealing base 8 is a plane, and a floating seal ring 9 is placed in the groove. Figure 3 It is a contact sealing structure: the upper end surface of the sealing base 8 is a plane, and the lower end of the curved sealing plate 7 (i.e. the aforementioned free end) is a smooth head, which contacts the upper surface of the sealing base 8. The sealing plate 7 rotates with the rotating cylinder, and a narrow gap is formed between the sealing plate 7 and the sealing base 8.

[0033] As a further optimization of the above scheme, it also includes a lower sealing structure, which is arranged at the lower position of the gap between the rotating cylinder bottom plate 3a and the fixed chassis 2; the lower sealing structure is mainly composed of an inner ring plate 10 and an outer ring plate 11, the inner ring plate 10 and the outer ring plate 11 are both annular structures and are coaxially arranged with the central axis OO' of the distributor, wherein the inner ring plate 10 is arranged on the lower end surface of the rotating cylinder bottom plate 3a, and the outer ring plate 11 is correspondingly arranged on the lower end surface of the fixed chassis 2, and the inner ring plate 10 and the outer ring plate 11 cooperate to form a maze channel.

[0034] Specifically, baffles or convex teeth 10a / 11a are alternately provided on the relative wall surfaces of the inner ring plate 10 and the outer ring plate 11. Since the convex teeth 10a on the inner ring plate 10 and the convex teeth 11a on the outer ring plate 11 are staggered and engaged in the axis OO' direction, the two ring plates cooperate to form a maze passage with narrow gaps, further preventing the entry of blast furnace dust.

[0035] In this system, a support 5 of an annular structure is installed on the bottom plate 3a of the rotating cylinder, and a mounting bracket 6 of an annular structure is connected to the support 5. One end of the sealing plate 7 is installed on the bracket 6, and the other end is in contact with the sealing base 8, and rotates with the rotating cylinder 3 around the central axis OO' of the distributor. Thus, the sealing plate 7 isolates the distributor shell 1 and the rotating cylinder 3 into a closed space. The nitrogen pipeline 12 is connected to the distributor shell 1, and the nitrogen enters the closed space, so that the pressure inside the distributor is greater than the pressure inside the blast furnace 4, forming a positive pressure environment; at the same time, an inner ring plate 10 of an annular structure is set under the bottom plate 3a of the rotating cylinder, and an outer ring plate 11 of an annular structure is set under the fixed chassis 2. The inner and outer ring plates 11 have concave and convex tooth structures that can bite each other, thereby forming a maze channel with narrow gaps, effectively preventing dust and high-temperature airflow from entering the distributor.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A distributor annular sealing system, characterized in that: It includes an upper sealing structure, which is placed at the upper position of the annular gap between the bottom plate of the rotating cylinder and the fixed chassis; the upper sealing structure is mainly composed of a support, a mounting bracket, a sealing plate and a sealing base, wherein the support is an annular structure, which is coaxially arranged on the upper end surface of the bottom plate of the rotating cylinder with the central axis of the distributor, the top of the support is connected with a mounting bracket of an annular structure, the upper end of the sealing plate with an annular structure is arranged on the mounting bracket, and the lower end of the sealing plate cooperates with the sealing base which is also an annular structure, and the sealing base is correspondingly arranged on the upper end surface of the fixed chassis and is coaxial with the central axis of the distributor; the sealing plate is an arc ring with the lower end bent toward the central axis of the distributor, and the lower end is a free end, which contacts the sealing base so that the sealing plate rotates around the central axis of the distributor with the bottom plate of the rotating cylinder.

2. The distributor annular sealing system according to claim 1, characterized in that: The upper end of the sealing plate is detachably connected to the mounting bracket through a connecting piece.

3. The distributor annular sealing system according to claim 1, characterized in that: The sealing plate is made of elastic metal or non-metal material.

4. The distributor annular sealing system according to claim 1, characterized in that: A sealing ring is arranged on the top of the sealing base, and an annular rail matched with the sealing ring is correspondingly arranged on the lower end of the sealing plate.

5. The distributor annular sealing system according to claim 1, characterized in that: The lower end of the sealing plate is correspondingly provided with an annular rail with a groove structure, and the sealing base is provided with a floating sealing ring which is buckled in the annular rail.

6. The distributor annular sealing system according to any one of claims 1 to 5, characterized in that: It also includes a lower sealing structure, which is arranged at the lower position of the gap between the bottom plate of the rotating cylinder and the fixed chassis; the lower sealing structure is mainly composed of an inner ring plate and an outer ring plate, and the inner ring plate and the outer ring plate are both coaxially arranged with the central axis of the distributor, wherein the inner ring plate is arranged on the lower end surface of the bottom plate of the rotating cylinder, and the outer ring plate is correspondingly arranged on the lower end surface of the fixed chassis, and the inner ring plate and the outer ring plate cooperate to form a maze channel.

7. The distributor annular sealing system according to claim 6, characterized in that: Baffles are alternately arranged on the opposite wall surfaces of the inner ring plate and the outer ring plate to form a labyrinth passage.

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