Water-leakage-proof blast furnace top structure and blast furnace equipment

Abstract

The utility model provides a leak-proof blast furnace top structure and blast furnace equipment, the leak-proof blast furnace top structure comprises: a furnace top steel ring having a first water cooling structure, the top of the furnace top steel ring having an annular groove, the bottom of the annular groove having a plurality of first water holes communicated with the first water cooling structure; the distributing device is provided with a second water cooling structure, the bottom of the distributing device is connected with the top of the furnace top steel ring, and second water holes corresponding to the first water holes and distributed in the circumference are formed in the bottom of the distributing device; a first sealing ring and a second sealing ring are arranged between the furnace top steel ring and the distributing device, and the annular groove is located between the first sealing ring and the second sealing ring. The blast furnace top structure capable of preventing water leakage can reduce the risk of water leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of iron or steel smelting, in particular to a water leakage prevention blast furnace top structure and blast furnace equipment. Background Art

[0002] The distributor is an important part of blast furnace ironmaking equipment. Generally, an all-open or semi-closed water-cooled structure is adopted inside the distributor, and a water-cooled furnace top steel ring is supporting. A ring seal or graphite braided packing is used for sealing between the distributor and the furnace top steel ring. If the seal fails at this place or some of the water holes on the furnace top steel ring are blocked, it may cause the cooling water of the distributor to flow into the blast furnace, resulting in a water leakage event, affecting the normal operation of the blast furnace and causing great economic losses. Summary of the Utility Model

[0003] In view of the above technical problems existing in the prior art, the utility model provides a water leakage prevention blast furnace top structure, which can reduce the risk of water leakage between the distributor and the blast furnace main body.

[0004] An embodiment of the utility model provides a water leakage prevention blast furnace top structure, including:

[0005] A furnace top steel ring, which has a first water-cooled structure. The top of the furnace top steel ring has an annular groove, and the bottom of the annular groove has a plurality of first water holes communicating with the first water-cooled structure;

[0006] A distributor, which has a second water-cooled structure. The bottom of the distributor is connected to the top of the furnace top steel ring. The bottom of the distributor has second water holes corresponding to the first water holes distributed on a circumference;

[0007] A first sealing ring and a second sealing ring are arranged between the furnace top steel ring and the distributor, and the annular groove is located between the first sealing ring and the second sealing ring.

[0008] In an optional embodiment, the bottom surface of the distributor has a convex platform, the second water holes are arranged on the convex platform, and the convex platform extends into the annular groove.

[0009] In an optional embodiment, the convex platform is an annular convex platform corresponding to the annular groove, and the annular convex platform is in clearance fit with the annular groove.

[0010] In an optional embodiment, the aperture of the first water hole is larger than the aperture of the second water hole.

[0011] In an optional embodiment, annular water retaining grooves are respectively arranged on one side close to the center of the circumference where the second water holes are located and on one side far from the center of the circumference where the second water holes are located, and the annular water retaining grooves are located within the range corresponding to the annular groove.

[0012] In an alternative embodiment, the cross-section of the annular water retaining groove is triangular, rectangular or N-shaped.

[0013] In an alternative embodiment, the depth of the annular water retaining groove is 0.8 - 1.2 mm.

[0014] In an alternative embodiment, the depth of the annular groove is ≥ 15 mm.

[0015] In an alternative embodiment, the total cross-sectional area of the first water holes is larger than the total cross-sectional area of the second water holes.

[0016] In an alternative embodiment, the aperture diameter of the first water holes is smaller than the width of the annular groove.

[0017] In a second aspect of the present utility model, there is provided a blast furnace device, which includes a blast furnace main body and the anti-leakage blast furnace top structure according to any one of the above embodiments provided at the top of the blast furnace main body.

[0018] In the anti-leakage blast furnace top structure provided by the embodiment of the present utility model, an annular groove is provided on the top surface of the top steel ring, and the second water holes on the top steel ring for communicating with the second water cooling structure of the distributor are provided at the bottom of the annular groove. When the cooling water in the first water cooling structure of the distributor enters the top steel ring, it first flows into the annular groove for secondary water flow distribution. Even if some of the first water holes in the top steel ring are blocked, the cooling water can still be shunted through the annular groove to other unblocked first water holes in the top steel ring to achieve buffering, and the water level will not be raised accordingly, that is, the problem of leakage of cooling water from between the sealing surface of the distributor and the top steel ring to the blast furnace main body can be avoided. It can be ensured that even if the sealing ring inside the annular groove fails, before the annular groove is filled with cooling water, the existence of the drop can still ensure that the cooling water cannot leak from between the sealing surface of the distributor and the top steel ring to the blast furnace main body, greatly reducing the leakage risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with alphabetic suffixes or different alphabetic suffixes may represent different instances of similar components. The drawings generally illustrate various embodiments by way of example and not limitation, and are used together with the description and the claims to explain the disclosed embodiments. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be an exhaustive or exclusive embodiment of the device or method.

[0020] Figure 1 It is a schematic structural diagram of the anti-leakage blast furnace top structure according to an embodiment of the present utility model;

[0021] Figure 2Partial enlarged structural schematic diagram of the water leakage prevention blast furnace top structure according to an embodiment of the present invention;

[0022] Figure 3 Partial enlarged exploded structural schematic diagram of the water leakage prevention blast furnace top structure according to an embodiment of the present invention;

[0023] Figure 4 Partial enlarged structural schematic diagram of the water leakage prevention blast furnace top structure according to another embodiment of the present invention;

[0024] Figure 5 Partial enlarged structural schematic diagram of the water leakage prevention blast furnace top structure according to still another embodiment of the present invention.

[0025] In the figure: 1 - top steel ring; 11 - first water cooling structure; 12 - first water hole; 13 - annular groove; 2 - distributor; 21 - second water cooling structure; 22 - second water hole; 23 - boss; 24 - annular water retaining groove; 3 - first sealing ring; 4 - second sealing ring. Detailed implementation manners

[0026] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation manners. The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation to the present invention.

[0027] The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. Terms such as "including" or "comprising" mean that the elements before this term cover the elements listed after this term, and do not exclude the possibility of also covering other elements. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] In the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0029] All terms used in the present utility model (including technical terms or scientific terms) have the same meanings as those understood by ordinary technicians in the field to which the present utility model pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0030] Technologies, methods, and devices known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the description.

[0031] The embodiments of the present utility model relate to blast furnace equipment and its leak-proof blast furnace top structure. The top of the blast furnace main body has a top steel ring 1, and the top steel ring 1 is generally welded to the blast furnace main body. The distributor 2 is connected to the top steel ring 1, and a sealing ring is provided between the distributor 2 and the top steel ring 1 to achieve the sealing of the water holes between the two.

[0032] See Figure 1 , the embodiments of the present utility model provide a leak-proof blast furnace top structure, including a top steel ring 1 and a distributor 2. Among them, the top steel ring 1 has a first water-cooling structure 11, the top of the top steel ring 1 has an annular groove 13, and the bottom of the annular groove 13 has a plurality of first water holes 12 communicating with the first water-cooling structure 11; the distributor 2 has a second water-cooling structure 21, the bottom of the distributor 2 is connected to the top of the top steel ring 1, and the bottom of the distributor 2 has second water holes 22 distributed on a circumference corresponding to the first water holes 12; a first sealing ring 3 and a second sealing ring 4 are provided between the top steel ring 1 and the distributor 2, and the annular groove 13 is located between the first sealing ring 3 and the second sealing ring 4.

[0033] In the anti-leakage blast furnace top structure provided by the embodiment of the present utility model, an annular groove 13 is provided on the top surface of the top steel ring 1 of the blast furnace. The second water hole 22 on the top steel ring 1 for communicating with the second water-cooled structure 21 of the distributor 2 is arranged at the bottom of the annular groove 13. When the cooling water in the first water-cooled structure 11 of the distributor 2 enters the top steel ring 1, it first flows into the annular groove 13 for secondary water flow distribution. Even if a part of the first water hole 12 of the top steel ring 1 is blocked, the cooling water can still be shunted through the annular groove 13 to other unblocked first water holes 12 of the top steel ring 1 to achieve buffering and will not raise the water level, that is, it can avoid the leakage of cooling water from between the sealing surface of the distributor 2 and the top steel ring 1 to the main body of the blast furnace. It can be ensured that even if the sealing ring inside the annular groove 13 fails, before the cooling water fills the annular groove 13, the existence of the head difference can still ensure that the cooling water cannot leak from between the sealing surface of the distributor 2 and the top steel ring 1 to the main body of the blast furnace, greatly reducing the leakage risk. Due to the buffering effect of the annular groove 13, it is allowed that the first water hole 12 and the second water hole 22 are not completely aligned, and there can be a certain deviation without causing the risk of cooling water leakage from the sealing surface.

[0034] In some embodiments, the bottom surface of the distributor 2 has a boss 23, the second water hole 22 is arranged on the boss, and the boss 23 extends into the annular groove 13. The bottom surface of the distributor 2 is provided with a boss 23, and the boss 23 extends the water outlet interface of the distributor 2 downward into the annular groove 13, making it lower than the sealing surface between the distributor 2 and the top steel ring 1, so as to avoid the water flow being directly brought into the interior of the main body of the blast furnace due to the pressure difference between the distributor 2 and the main body of the blast furnace.

[0035] In an exemplary embodiment, each second water hole 22 corresponds to a boss 23 respectively, and a plurality of bosses 23 are distributed on the circumference corresponding to the annular groove 13.

[0036] In other exemplary embodiments, the boss 23 is an annular boss corresponding to the annular groove 13. The annular boss is in clearance fit with the annular groove 13. The annular boss is in clearance fit with the annular groove 13 to form a labyrinth seal, avoiding the water flow being directly brought into the interior of the main body of the blast furnace due to the pressure difference between the distributor 2 and the main body of the blast furnace and reducing the risk of cooling water leakage.

[0037] In some embodiments, the aperture of the first water hole 12 is larger than the aperture of the second water hole 22. The first water hole 12 of the top steel ring 1 is larger in diameter than the second water hole 22 of the distributor 2, so that a certain misalignment deviation between the second water hole 22 of the distributor 2 and the first water hole 12 of the top steel ring 1 is allowed, avoiding the water flow entering the sealing surface and reducing the risk of cooling water leakage.

[0038] In some embodiments, annular water retaining grooves 24 are respectively provided on one side of the second water hole 22 close to the center of the circumference where it is located and on one side away from the center of the circumference where it is located. The annular water retaining grooves 24 are located within the range corresponding to the annular groove 13. Designing the annular water retaining grooves 24 on both sides of the second water hole 22 can restrict the dispersion of the cooling water, thereby achieving a more stable flow and reducing the risk of the cooling water entering the sealing surface between the distributor 2 and the top ring 1 of the furnace, resulting in leakage of the cooling water. The annular water retaining grooves 24 on both sides of the second water hole 22 can be respectively one or two or more.

[0039] In some embodiments, the cross-section of the annular water retaining groove 24 is triangular, rectangular or n-shaped. Of course, it can also be other shapes. In an exemplary embodiment, the cross-section of the annular water retaining groove 24 is an isosceles triangle, and the angle of the apex of the triangle can be an acute angle, a right angle or an obtuse angle. For example, the cross-section of the annular water retaining groove 24 is an isosceles right triangle.

[0040] In some embodiments, the depth of the annular water retaining groove 24 is 0.8 - 1.2 mm.

[0041] In some embodiments, the depth of the annular groove 13 ≥ 15 mm. The depth of the annular groove 13 not less than 15 mm can meet the buffering requirements of the cooling water under normal circumstances, and can ensure that the cooling water is buffered in the case of partial blockage of the first water holes 12 or splashing of super-large flow water, without overflowing from the annular groove 13.

[0042] In some embodiments, the total cross-sectional area of the first water holes 12 is larger than the total cross-sectional area of the second water holes 22. The total flow capacity of the first water holes 12 is greater than the total flow capacity of the second water holes 22, which can prevent the cooling water from accumulating in the annular groove 13 and will not cause a large pressure on the sealing surface.

[0043] In some embodiments, the aperture of the first water holes 12 is smaller than the width of the annular groove 13. The aperture of the first water holes 12 being smaller than the width of the annular groove 13 allows for a large drilling error and is easy to manufacture.

[0044] Multiple sealing rings can be provided on both the inner and outer sides of the annular groove 13 for backup and enhancing the sealing effect. For example, providing multiple second sealing rings 4 on the inner side of the annular groove 13 can prevent the cooling water from entering the main body of the blast furnace.

[0045] See Figure 4, at the interface between the distributor 2 and the top ring 1 of the furnace, the cooling water flowing out from the second water hole 22 flows radially into the annular groove 13 of the top ring 1 of the furnace. The annular groove 13 receives all the water flows of the cooling water, including the dissipated water flow and the splashing water flow. After the water flow is redistributed by the annular groove 13, it flows into the first water-cooled structure 11 of the top ring 1 of the furnace from the first water hole 12 of the top ring 1 of the furnace, and finally is discharged from the drain port. The annular groove 13 realizes the stability of the cooling water flow. By redistributing the cooling water through the annular groove 13, the flow capacity of the equipment is improved. Under the working conditions of seal failure and partial blockage of the second water hole 22 of the top ring 1 of the furnace, the water flow can still flow stably and normally, avoiding water leakage accidents.

[0046] See Figure 2 , compared with the embodiment shown in Figure 4 , a ring-shaped boss 23 is added. The ring-shaped boss 23 extends the water outlet interface of the second water hole 22 of the distributor 2 downward, making it lower than the sealing surface between the distributor 2 and the top ring 1 of the furnace, forming a labyrinth seal to prevent the water flow from being directly brought into the interior of the blast furnace body due to the pressure difference between the distributor 2 and the blast furnace body.

[0047] See Figure 5 , compared with the embodiment shown in Figure 4 , a ring-shaped water retaining groove 24 is added. The ring-shaped water retaining groove 24 can restrain the dispersion of the cooling water and realize a more stable flow of the cooling water.

[0048] In the second aspect of the present utility model, a blast furnace device is provided. The blast furnace device includes a blast furnace body and the blast furnace top structure of any one of the above embodiments provided at the top of the blast furnace body.

[0049] The above embodiments are only exemplary embodiments of the present utility model and are not used to limit the present utility model. The protection scope of the present utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present utility model within the essence and protection scope of the present utility model, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present utility model.

Claims

1. A leak-proof blast furnace top structure, characterized in that, Comprising: A top steel ring having a first water-cooling structure, with an annular groove at the top of the top steel ring, and a plurality of first water holes communicating with the first water-cooling structure at the bottom of the annular groove; A distributor having a second water-cooling structure, the bottom of the distributor being connected to the top of the top steel ring, and having second water holes distributed on a circumference corresponding to the first water holes at the bottom of the distributor; A first sealing ring and a second sealing ring are provided between the top steel ring and the distributor, and the annular groove is located between the first sealing ring and the second sealing ring.

2. The anti-leakage blast furnace top structure according to claim 1, characterized in that, The bottom surface of the distributor has a boss, the second water holes are provided on the boss, the boss extends into the annular groove, and the boss is in clearance fit with the annular groove.

3. The water leakage prevention blast furnace top structure according to claim 1, characterized in that The aperture of the first water hole is larger than the aperture of the second water hole.

4. The anti-leakage blast furnace top structure according to claim 3, characterized in that, Annular water retaining grooves are respectively provided on one side close to the center of the circumference where the second water hole is located and on one side far from the center of the circumference where the second water hole is located, and the annular water retaining grooves are located within the range corresponding to the annular groove.

5. The anti-leakage blast furnace top structure according to claim 4, characterized in that, The cross section of the annular water retaining groove is triangular, rectangular or n-shaped.

6. The water leakage prevention blast furnace top structure according to claim 4, characterized in that, The depth of the annular water retaining groove is 0.8 - 1.2 mm.

7. The anti-leakage blast furnace top structure according to claim 1, characterized in that The depth of the annular groove ≥ 15 mm.

8. The anti-leakage blast furnace top structure according to claim 1, characterized in that, The total cross-sectional area of the first water holes is larger than the total cross-sectional area of the second water holes.

9. The water leakage prevention blast furnace top structure according to claim 1, characterized in that The aperture of the first water hole is smaller than the width of the annular groove.

10. A blast furnace device, comprising a blast furnace body, characterized in that, It further includes a leak-proof blast furnace top structure according to any one of claims 1 - 9 provided at the top of the blast furnace body.

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