A blast furnace blowpipe leak detection device

Abstract

This utility model relates to the technical field of steel smelting equipment, and in particular to a blast furnace blowdown leak detection device, including a smoke-making chimney, an air inlet pipe disposed on the side of the smoke-making chimney, the air inlet of the air inlet pipe being connected to an air compressor, high-pressure air, or a blower, an air outlet pipe disposed on the side of the smoke-making chimney away from the air inlet pipe, the air outlet pipe being connected to the blast furnace air supply pipe, a small sleeve fitted inside the blowdown pipe, a combustion plate disposed at the bottom of the smoke-making chimney, the smoke cake being burned in the combustion plate, and a filter structure disposed at the top of the combustion plate. Because the volume of the smoke cake decreases as it burns, and the air inlet pipe of the smoke-making chimney is connected to high-pressure air, the high-pressure air sends the smoke into the blast furnace blowdown pipe through the air outlet pipe. As the volume of the smoke cake gradually decreases with combustion, there is a risk that it will be carried by the high-pressure air from the air outlet pipe into the blast furnace blowdown pipe, causing blockage. Therefore, the filter structure is used to block the smoke cake and restrict its movement in the smoke-making chimney.

Description

Technical Field

[0001] This utility model relates to the field of steel smelting equipment technology, and in particular to a blast furnace blowdown leak detection device. Background Technology

[0002] The direct-blown pipe is an important component of the blast furnace air supply system, used to deliver hot air heated by the hot blast stove into the blast furnace. If gaps appear in the direct-blown pipe, it will affect the insulation effect of the pipe and increase the heat loss of the high-temperature air delivered into the blast furnace. Therefore, after the blast furnace is shut down or the direct-blown pipe is replaced in front of the furnace, a leak test is required. Because the space between the blower and the sleeve in the blast furnace tuyeres area is narrow, one can only extend an arm and feel for air leakage with fingers or observe it directly with the naked eye, which can easily lead to inaccurate leak tests. After the blast furnace is restarted, the direct-blown pipe will leak air severely.

[0003] Since leaks in the blast furnace tuyeres area are difficult to detect, a device with good leak detection performance is needed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the technical problem that the air leakage at the blowpipe air outlet is difficult to detect in the existing technology, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a blast furnace blowdown tube leak detection device, which includes a smoke-making tube, an air inlet pipe disposed on the side of the smoke-making tube, an air outlet pipe disposed on the side of the smoke-making tube away from the air inlet pipe, a combustion plate disposed at the bottom of the smoke-making tube, and a filter structure disposed at the top of the combustion plate.

[0007] The smoke-making cylinder is hollow inside, the air inlet pipe is connected to the smoke-making cylinder, the smoke-making cylinder is connected to the air outlet pipe, and the filter structure is disposed inside the smoke-making cylinder.

[0008] In a preferred embodiment of the blast furnace blowdown leak detection device of this utility model, the air inlet pipe is located near the upper part of the filter structure, and the air outlet pipe is located above the air inlet pipe.

[0009] As a preferred embodiment of the blast furnace blowdown leak detection device of this utility model, the top of the inner cavity of the smoke-making tube is set in a sloping shape, wherein the end near the air inlet pipe is lower than the end near the air outlet pipe, and the top of the inner cavity of the smoke-making tube is machined into an arc shape.

[0010] As a preferred embodiment of the blast furnace blowdown tube leak detection device of this utility model, the bottom of the inner wall of the smoke-making tube is provided with a receiving groove, and an opening is provided on one side of the bottom of the receiving groove.

[0011] As a preferred embodiment of the blast furnace blowpipe leak detection device of this utility model, wherein: an elastic element is provided at the top of the inner wall of the receiving groove, and a pressure plate is provided at the bottom of the elastic element.

[0012] As a preferred embodiment of the blast furnace blowpipe leak detection device of this utility model, the combustion plate includes a support plate, the top side of the support plate is provided with a hanging lug, the outer wall of the support plate is provided with an annular tray, and the top of the annular tray is provided with a sealing ring.

[0013] In a preferred embodiment of the blast furnace blowpipe leak detection device of this utility model, a support column is provided on the top of the bearing plate, and a locking block is provided on the top of the support column.

[0014] As a preferred embodiment of the blast furnace blowdown leak detection device of this utility model, the filter structure includes a filter screen disposed inside the smoke-making cylinder, a hanging plate is provided on the side of the filter screen, and a slot is provided at the bottom of the filter screen.

[0015] In a preferred embodiment of the blast furnace blowdown leak detection device of this utility model, the slot is located directly above the block, and the slot cooperates with the block.

[0016] As a preferred embodiment of the blast furnace blowdown leak detection device of this utility model, the inner wall of the smoke-making cylinder is provided with a sliding groove, and the inner wall of the sliding groove cooperates with the hanging plate.

[0017] The beneficial effects of this blast furnace blowdown leak detection device are as follows: This device introduces smoke into the blast furnace blowdown pipe by burning smoke cake, making the air leakage situation obvious and easy to detect. At the same time, it filters the smoke cake to prevent it from burning too small and entering the blowdown pipe with the air. Both the combustion plate and the filter structure are easy to disassemble and assemble. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the filter structure in this utility model.

[0021] Figure 3 This is a cross-sectional schematic diagram of the smoke-making cylinder in this utility model.

[0022] Figure 4 This is a schematic diagram of the accommodating groove in this utility model.

[0023] Figure 5 This is a schematic diagram of the combustion disc in this utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the filter screen in this utility model. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Example 1, referring to Figures 1-6This is the first embodiment of the present invention, which provides a blast furnace blowdown leak detection device, including a smoke-making tube 1, inside which a smoke cake is placed, and its combustion produces smoke. An air inlet pipe 2 is located on the side of the smoke-making tube 1, and the air inlet of the air inlet pipe 2 is connected to an air compressor, high-pressure air, or a blower. An air outlet pipe 3 is located on the side of the smoke-making tube 1 away from the air inlet pipe 2, and the air outlet pipe 3 is connected to the blast furnace's air supply pipe. A small sleeve is fitted inside the blowdown tube. A combustion plate 4 is located at the bottom of the smoke-making tube 1, and the smoke cake is placed on the combustion plate. Combustion takes place in the burning pan 4. The filter structure 5 is set on the top of the burning pan 4. Because the volume of the smoke cake decreases as it burns, and the air inlet pipe 2 of the smoke making tube 1 is connected to high-pressure air, the high-pressure air sends the smoke into the blast furnace blowpipe through the exhaust pipe 3. As the volume of the smoke cake gradually decreases with combustion, there is a risk that it will be carried by the high-pressure air from the exhaust pipe 3 into the blast furnace blowpipe, causing blockage. Therefore, the filter structure 5 is used to block the smoke cake and restrict its movement in the smoke making tube 1. At the same time, it also filters out large particulate impurities produced by incomplete combustion of the smoke cake.

[0029] The smoke-making cylinder 1 is hollow inside, the air inlet pipe 2 is connected to the smoke-making cylinder 1, the smoke-making cylinder 1 is connected to the air outlet pipe 3, the filter structure 5 is set inside the smoke-making cylinder 1, and the smoke cake is placed inside the smoke-making cylinder 1 for combustion.

[0030] Usage process: When maintaining the blast furnace, place the burning smoke cake at the bottom of the smoke-making tube 1, and fit the end of the exhaust pipe 3 away from the smoke-making tube 1 into the small sleeve inside the blowpipe. Connect the air inlet of the air inlet pipe 2 to the air compressor. High-pressure air sends the smoke through the exhaust pipe 3 into the blast furnace blowpipe. If smoke drifts out from the gap between the small sleeve and the blowpipe, it indicates that there is a gap between the small sleeve and the blowpipe and there will be air leakage. Conversely, it indicates that there is no air leakage.

[0031] Example 2, refer to Figures 1-6 This is the second embodiment of the present invention. Unlike the previous embodiment, the air inlet pipe 2 is located near the upper part of the filter structure 5, and the air outlet pipe 3 is located above the air inlet pipe 2. Changing the relative position between the air inlet pipe 2 and the air outlet pipe 3 can adjust the approximate flow direction and angle of the air in the smoke-making stack 1, which can reduce the irregular flow of smoke in the smoke-making stack 1 and make it enter the blast furnace air duct from the air outlet pipe 3 more quickly.

[0032] Furthermore, the top of the inner cavity of the chimney 1 is sloping, with the end near the inlet pipe 2 being lower than the end near the outlet pipe 3, and the top of the inner cavity of the chimney 1 is machined into an arc shape, such as... Figure 2 As shown, the top of the inner cavity of the chimney 1 is designed as a slope, and the height of the air inlet pipe 2 is adjusted so that the general direction of airflow inside the chimney 1 is as follows. Figure 2As shown by the middle arrow, the smoke generated at the bottom of the smoke generator 1 is carried by the flowing air and discharged from the exhaust pipe 3, entering the blast furnace air duct for leak detection. This design allows the smoke to be discharged from the smoke generator 1 more quickly and participate in leak detection more quickly, thus improving the leak detection efficiency.

[0033] Example 3, referring to Figures 1-6 This is the third embodiment of the present invention. Unlike the previous embodiment, the bottom of the inner wall of the chimney 1 is provided with a receiving groove 11, and an opening 12 is provided on one side of the bottom of the receiving groove 11. An elastic member 13 is provided at the top of the inner wall of the receiving groove 11. Preferably, the elastic member 13 can be a spring. The spring is in a compressed state, and a pressure plate 14 is provided at the bottom of the elastic member 13. The pressure plate 14 bears the downward pressure from the spring and the upward support force from the bottom of the receiving groove 11.

[0034] Furthermore, the combustion disc 4 includes a support disc 41, and a hanging ear 42 is provided on the top side of the support disc 41. Preferably, the volume of the hanging ear 42 is slightly smaller than the size of the opening 12. An annular tray 43 is provided on the outer wall of the support disc 41, and a sealing ring 44 is provided on the top of the annular tray 43. Preferably, the sealing ring 44 has a certain elasticity. The outer diameter of the annular tray 43 is slightly larger than the outer diameter of the support disc 41. Correspondingly, a stepped groove is provided at the bottom of the smoke-making pipe 1.

[0035] Usage: When leak detection is required for blast furnace blowdown tubes, ignite the smoke cake and place it in the support plate 41. Align the lugs 42 of the support plate 41 with the opening 12 and push them upwards. Rotate the support plate 41 to rotate the lugs 42 into the receiving groove 11. The support plate 41 is then locked to the bottom of the smoke-making tube 1. At the same time, the lugs 42 are between the pressure plate 14 and the bottom of the receiving groove 11 and are subjected to the pressure of the pressure plate 14. The pressure plate 14 also generates friction on the lugs 42 to prevent them from falling off. Meanwhile, the sealing ring 44 at the top of the annular tray is pressed tightly under the stepped groove at the bottom of the smoke-making tube 1 to form a seal. This allows the smoke generated by combustion to enter the blast furnace blowdown tubes from above with the airflow. When the leak detection is completed and the smoke cake needs to be removed and extinguished for recycling, simply rotate the support plate 41 in the opposite direction to rotate the lugs 42 to the position of the opening 12, and the support plate 41 can be removed. The support plate 41 is easy to disassemble and convenient for inserting and removing the smoke cake.

[0036] Example 4, refer to Figures 1-6 This is the fourth embodiment of the present utility model. Unlike the previous embodiment, the top of the bearing plate 41 is provided with a support column 45. Preferably, multiple support columns 45 are provided so that the support column 45 can stably support the filter structure 5 when it moves upward. The top of the support column 45 is provided with a locking block 46.

[0037] Furthermore, the filter structure 5 includes a filter screen 51 disposed inside the smoke-making cylinder 1. A hanging plate 52 is provided on the side of the filter screen 51, and a slot 53 is provided at the bottom of the filter screen 51. The slot 53 is located directly above the slot block 46 and cooperates with the slot block 46.

[0038] Furthermore, the inner wall of the chimney 1 is provided with a groove 15, the inner wall of the groove 15 is matched with the hanging plate 52, the groove 15 is set in the shape of "7", and the bottom of the groove extends all the way to the bottom of the chimney 1.

[0039] Usage: When loading the filter structure 5, place the filter screen 51 on the upper part of the support plate 41. The slot 53 of the filter screen 51 is connected to the locking block 46 on the top of the support column 45. Push the support plate 41 upwards along with the filter screen 51. The hanging plate 52 on the side of the filter screen 51 slides from the bottom of the "7"-shaped slide groove 15 into the horizontal groove inside the slide groove 15. At this time, the hanging ears 42 of the support plate 41 also enter the receiving groove 11. Rotating the support plate 41 will fix the support plate 41 in the smoke-making cylinder 1, and at the same time, the hanging plate 52 of the filter screen 51 will enter the horizontal groove of the slide groove 15, completing the positioning of the filter screen 51 in the smoke-making cylinder 1, enabling it to filter impurities. At the same time, when the device... After a period of use, the filter pores on the surface of the filter screen 51 may be contaminated or even clogged by large particles of impurities, requiring cleaning. When removing the carrier plate 41, simply push the carrier plate 41 upwards until the locking block 46 at the top of the support column 45 extends into the locking groove 53 at the bottom of the filter screen 51. Then rotate the carrier plate 41 to rotate the filter screen 51 during the removal process, rotating the hanging plate 52 on the side of the filter screen 51 into the vertical groove at the bottom of the "7"-shaped slide 15. After removing the carrier plate 41, the filter screen 51 can easily slide out of the slide 15 under the action of gravity, making it easy to remove and clean the filter screen 51.

[0040] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0041] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0042] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A blast furnace lance leak detection apparatus, characterized by: include, A smoke-making chimney (1), an air inlet pipe (2) disposed on the side of the smoke-making chimney (1), an air outlet pipe (3) disposed on the side of the smoke-making chimney (1) away from the air inlet pipe (2), a combustion plate (4) disposed at the bottom of the smoke-making chimney (1), and a filter structure (5) disposed at the top of the combustion plate (4). The smoke-making cylinder (1) is hollow inside, the air inlet pipe (2) is connected to the smoke-making cylinder (1), the smoke-making cylinder (1) is connected to the air outlet pipe (3), and the filter structure (5) is disposed inside the smoke-making cylinder (1).

2. The blast furnace blowdown tube leak detection device as described in claim 1, characterized in that: The air inlet pipe (2) is located near the upper part of the filter structure (5), and the air outlet pipe (3) is located above the air inlet pipe (2).

3. The blast furnace blowdown tube leak detection device as described in claim 2, characterized in that: The top of the inner cavity of the chimney (1) is set in a sloping shape, wherein the end near the air inlet pipe (2) is lower than the end near the air outlet pipe (3), and the top of the inner cavity of the chimney (1) is machined into an arc shape.

4. The blast furnace blowdown tube leak detection device as described in claim 1, characterized in that: The bottom of the inner wall of the chimney (1) is provided with a receiving groove (11), and an opening (12) is provided on one side of the bottom of the receiving groove (11).

5. The blast furnace blowdown tube leak detection device as described in claim 4, characterized in that: An elastic element (13) is provided at the top of the inner wall of the receiving groove (11), and a pressure plate (14) is provided at the bottom of the elastic element (13).

6. The blast furnace blowdown tube leak detection device as described in claim 5, characterized in that: The combustion disc (4) includes a support disc (41), the top side of the support disc (41) is provided with a hanging ear (42), the outer wall of the support disc (41) is provided with an annular tray (43), and the top of the annular tray (43) is provided with a sealing ring (44).

7. The blast furnace blowdown tube leak detection device as described in claim 6, characterized in that: The top of the support plate (41) is provided with a support column (45), and the top of the support column (45) is provided with a locking block (46).

8. The blast furnace blowdown tube leak detection device as described in claim 7, characterized in that: The filter structure (5) includes a filter screen (51) disposed inside the smoke-making cylinder (1), a hanging plate (52) is provided on the side of the filter screen (51), and a slot (53) is provided at the bottom of the filter screen (51).

9. The blast furnace blowdown tube leak detection device as described in claim 8, characterized in that: The card slot (53) is located directly above the card block (46), and the card slot (53) cooperates with the card block (46).

10. The blast furnace blowdown leak detection device as described in claim 9, characterized in that: The inner wall of the chimney (1) is provided with a groove (15), and the inner wall of the groove (15) cooperates with the hanging plate (52).

Images