Anti-blocking blast furnace coal injection pipeline

Abstract

The utility model provides a kind of anti-clogging blast furnace coal injection pipeline, belong to blast furnace coal injection technical field, including coal injection pipeline, coal injection pipeline is provided with the cleaning mechanism for preventing clogging, cleaning mechanism includes the slot that is opened in coal injection pipeline, the stop block that can be pulled out is arranged in slot, sliding sleeve is slidably arranged on stop block, sliding sleeve is provided with moving part, moving part is connected with the cleaning ring that is contacted with the inner wall of coal injection pipeline, moving part is used to drive cleaning ring to move back and forth in coal injection pipeline and clean coal powder, the utility model can effectively clean the coal powder adsorbed on the inner wall of coal injection pipeline, thereby reduce subsequent clogging frequency, ensure the coal injection quantity of coal injection pipeline, improve the coal injection efficiency of coal injection pipeline.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace pulverized coal injection technology, specifically to a blast furnace pulverized coal injection pipe that prevents blockage. Background Technology

[0002] Pulverized coal injection is one of the most important fuels in blast furnace smelting. Achieving high-volume injection and high oxygen enrichment is a powerful means to reduce costs and increase efficiency in blast furnaces. As the coal ratio in blast furnaces continues to increase, influenced by market conditions, the quality of pulverized coal has gradually declined in order to save costs to the maximum extent. The increased proportion of bituminous coal and a small amount of coke powder and reactive coke powder have led to uneven pulverized coal injection, causing varying degrees of blockage and wear in the blast furnace pulverized coal injection pipes. This affects the uniform and stable pulverized coal injection rate and the smooth operation of the blast furnace. Therefore, cleaning mechanisms are needed to prevent pulverized coal from clogging the blast furnace pulverized coal injection pipes. Some existing anti-clogging blast furnace pulverized coal injection pipes use negative pressure reflux to guide the pulverized coal that is blocked in the injection pipe to the return pulverized coal bin, thereby achieving the effect of pipe cleaning. However, in actual use, this method fails to effectively clean the pulverized coal adsorbed on the inner wall of the injection pipe, which may increase the frequency of subsequent blockages, reduce the amount of pulverized coal injected, and thus affect the pulverized coal injection efficiency. Utility Model Content

[0003] In view of this, the present invention provides a blast furnace pulverized coal injection pipe that is designed to prevent clogging. This pipe can effectively clean the coal powder adsorbed on the inner wall of the pulverized coal injection pipe, thereby reducing the frequency of subsequent clogging, ensuring the amount of pulverized coal injected, and improving the pulverized coal injection efficiency of the pulverized coal injection pipe.

[0004] To solve the above-mentioned technical problems, this utility model provides a blast furnace pulverized coal injection pipe that is not clogged, including a pulverized coal injection pipe and a cleaning mechanism for preventing clogging.

[0005] The cleaning mechanism includes a slot cut into the pulverized coal injection pipe, with a pull-out stop block installed inside the slot. When the stop block is placed in the slot, it provides a seal, preventing pulverized coal from leaking through the slot during pulverized coal injection. A sliding sleeve is slidably mounted on the stop block, and a moving part is mounted on the sliding sleeve. A cleaning ring that contacts the inner wall of the pulverized coal injection pipe is connected to the moving part. The cleaning ring contacts the inner wall of the pulverized coal injection pipe, and the moving part is used to drive the cleaning ring to move back and forth inside the pulverized coal injection pipe to clean up the pulverized coal.

[0006] The movable component includes an insert block located at the bottom of the sliding sleeve. A slot is provided on the unblocking ring, and the insert block is inserted into the slot. A limit plate is provided at the bottom of the insert block, which can drive the stop block to move upward when the unblocking ring is stationary. The limit plate can prevent the insert block from being pulled upward too far and then detaching from the unblocking ring.

[0007] The movable component also includes a connecting block located on the upper part of the sliding sleeve. The connecting block is equipped with a handle for pulling the cleaning mechanism, which facilitates pulling the unblocking ring inside the pulverized coal injection pipeline to clear blockages.

[0008] The cleaning mechanism includes a limiting groove on one side of the pulverized coal pipeline, with a sliding sleeve located inside the limiting groove to limit and fix the sliding sleeve. The limiting groove and the sliding sleeve cooperate to prevent pulverized coal from seeping out through the bottom of the sliding sleeve.

[0009] The pulverized coal injection pipeline is equipped with a clamping mechanism, which includes a movable shaft located above the pulverized coal injection pipeline. One end of the movable shaft is threaded with a bolt, and a pressure plate is located at the bottom of the bolt. The pressure plate can press down and fix the stop block. When it is necessary to clear the blockage, the operator can unscrew the bolt upwards. Under the action of the movable shaft, the pressure plate is moved out, so that the stop block loses its limit and can be lifted upwards.

[0010] A connecting frame is installed on the pulverized coal injection pipeline, and a movable groove is opened on the connecting frame. The connecting block is located in the movable groove, and the connecting block can be moved in the movable groove by pulling the handle.

[0011] The inner sidewall of the connecting frame is symmetrically equipped with slide rails, and both ends of the stop block are equipped with sliders that slide with the slide rails, which facilitates the stability of the stop block when it moves and ensures that the two sides are level when the stop block is raised.

[0012] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0013] 1. When this utility model is used, it can effectively clean the coal powder adsorbed on the inner wall of the coal injection pipeline, thereby reducing the frequency of subsequent blockages, ensuring the coal injection volume of the coal injection pipeline, and improving the coal injection efficiency of the coal injection pipeline.

[0014] 2. When this utility model is used, the unblocking ring is in direct contact with the inner wall of the pipeline, and the adsorbed coal powder is thoroughly removed by mechanical scraping, ensuring a stable coal injection volume.

[0015] 3. When using this utility model, the stop block and clamping mechanism are designed to work together. Simply loosen the bolts to lift the stop block and start cleaning. The operation is convenient. After resetting, the pressure plate applies pressure and seals, eliminating the risk of coal powder leakage.

[0016] 4. When this utility model is used, the limiting plate at the bottom of the insert block forms a mechanical locking position, preventing the unblocking ring from falling off when the block is lifted, thus ensuring the reliability of the mechanism for repeated use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an isometric structural schematic diagram of the cleaning mechanism of this utility model;

[0019] Figure 3 This is an enlarged detailed structural diagram of the cleaning mechanism of this utility model;

[0020] Figure 4 This is an enlarged detailed structural diagram of the clamping mechanism of this utility model;

[0021] Figure 5 This is an isometric structural schematic diagram of the removal and cleaning mechanism of the pulverized coal pipeline according to the present invention.

[0022] Figure 6 For the present utility model Figure 5 A detailed structural diagram of point A in the middle, enlarged;

[0023] Figure 7 This is an isometric structural schematic diagram of the pulverized coal injection pipeline of this utility model.

[0024] Figure 8 For the present utility model Figure 7 Enlarged structural diagram at point B.

[0025] Explanation of reference numerals in the attached drawings: 100, pulverized coal injection pipe; 200, cleaning mechanism; 201, slot; 202, stop block; 203, sliding sleeve; 204, unblocking ring; 205, moving part; 2051, insert block; 2052, slot; 2053, limiting plate; 2054, connecting block; 2055, handle; 206, limiting groove; 300, clamping mechanism; 301, movable shaft; 302, bolt; 303, pressure plate; 401, connecting frame; 402, moving groove; 501, slider; 502, slide rail. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-8 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0027] According to one embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3 and Figure 5As shown: This embodiment provides a blast furnace pulverized coal injection pipe for preventing blockage, including a pulverized coal injection pipe 100. A cleaning mechanism 200 for preventing blockage is provided on the pulverized coal injection pipe 100. The cleaning mechanism 200 includes a slot 201 formed in the pulverized coal injection pipe 100, and a pull-out baffle 202 is provided within the slot 201. The baffle 202 is T-shaped and provides a seal when placed within the slot 201, preventing pulverized coal from leaking through the slot 201 during pulverized coal injection operations. The block 202 is slidably provided with a sliding sleeve 203, and a moving part 205 is provided on the sliding sleeve 203. A cleaning ring 204 that contacts the inner wall of the pulverized coal injection pipe 100 is connected to the moving part 205. The cleaning ring 204 contacts the inner wall of the pulverized coal injection pipe 100. The moving part 205 is used to drive the cleaning ring 204 to move back and forth in the pulverized coal injection pipe 100 to clean the coal powder. The adsorbed coal powder is thoroughly removed by mechanical scraping, which significantly reduces the frequency of blockage and ensures the stability of the pulverized coal injection volume and the injection efficiency.

[0028] Furthermore, such as Figure 3 , Figure 7 and Figure 8 As shown, the movable component 205 includes an insert block 2051 disposed at the bottom of the sliding sleeve 203. A slot 2052 is provided on the unblocking ring 204. The insert block 2051 is inserted into the slot 2052. A limit plate 2053 is provided at the bottom of the insert block 2051. It can drive the stop block 202 to move upward when the unblocking ring 204 is stationary. The limit plate 2053 can prevent the insert block 2051 from being pulled upward too far and detaching from the unblocking ring 204. The limit plate 2053 at the bottom of the insert block 2051 forms a mechanical lock to prevent the unblocking ring 204 from falling off when the stop block 202 is lifted, thus ensuring the reliability of the mechanism for repeated use.

[0029] Furthermore, the movable component 205 also includes a connecting block 2054 disposed on the upper part of the sliding sleeve 203. The connecting block 2054 is provided with a handle 2055 for pulling the cleaning mechanism 200, so as to facilitate pulling the unblocking ring 204 inside the pulverized coal pipeline 100 for unblocking.

[0030] Furthermore, such as Figure 5 and Figure 6 As shown, the cleaning mechanism 200 includes a limiting groove 206 opened on one side of the pulverized coal pipeline 100. The sliding sleeve 203 is located in the limiting groove 206 and is used to limit and fix the sliding sleeve 203. The limiting groove 206 cooperates with the sliding sleeve 203 to prevent coal dust from seeping out through the bottom of the sliding sleeve 203.

[0031] According to another embodiment of the present invention, such as Figure 2 , Figure 4 and Figure 7As shown, a clamping mechanism 300 is provided on the pulverized coal injection pipe 100. The clamping mechanism 300 includes a movable shaft 301 located above the pulverized coal injection pipe 100. One end of the movable shaft 301 is threaded with a bolt 302. A pressure plate 303 is provided at the bottom of the bolt 302. The pressure plate 303 can press down and fix the stop block 202. When it is necessary to clear the blockage, the operator can unscrew the bolt 302 upwards. Under the action of the movable shaft 301, the pressure plate 303 is moved out, so that the stop block 202 can be lifted upwards without being limited. The stop block 202 and the clamping mechanism 300 are designed to work together. Only by loosening the bolt 302 can the stop block 202 be lifted to start the cleaning process. The operation is convenient. After resetting, the pressure plate 303 is pressurized and sealed to eliminate the risk of pulverized coal leakage.

[0032] Furthermore, such as Figure 1 As shown, a connecting frame 401 is provided on the pulverized coal injection pipe 100. A movable groove 402 is provided on the connecting frame 401. The connecting block 2054 is located in the movable groove 402. The connecting block 2054 can be moved in the movable groove 402 by pulling the handle 2055.

[0033] Furthermore, such as Figure 8 As shown, slide rails 502 are symmetrically arranged on the inner sidewall of the connecting frame 401, and sliders 501 that slide with slide rails 502 are provided at both ends of the stop block 202. This facilitates the stability of the stop block 202 when it moves, ensures that the two sides are level when the stop block 202 is lifted upward, and ensures that the stop block 202 rises and falls smoothly without tilting.

[0034] The method of using this utility model is as follows: When performing the unblocking operation of the pulverized coal injection pipeline 100, the operator can remove the clamping mechanism 300 and then grasp the handle 2055 to lift the stop block 202 upward. During the lifting process, the insert block 2051 will be pulled upward from the slot 2052 of the unblocking ring 204, ensuring that the unblocking ring 204 is not affected during the lifting. After the stop block 202 is lifted and disengaged from the slot 201, the sliding sleeve 203 will also disengage from the limit slot 206. Then, the operator can use the handle 2055 to pull the sliding sleeve 203 to slide on the stop block 202, so that the unblocking ring 204 can perform the unblocking operation on the pulverized coal injection pipeline 100. After the cleaning operation is completed, the operator can use the movable part 205 to remove the sliding sleeve 202. 03 Move to correspond with the limiting groove 206 and lower the stop block 202 into the slot 201. At this time, the sliding sleeve 203 will fall into the limiting groove 206, thereby achieving the sealing effect after clearing the blockage. Then, the operator can move the bolt 302 to the top of the stop block 202 through the movable shaft 301, and by rotating the bolt 302, the pressure plate 303 will move down to the surface of the stop block 202, thereby pressing the stop block 202, further ensuring the sealing between the slot 201 and the stop block 202 during coal injection. This utility model can effectively clean the coal powder adsorbed on the inner wall of the coal injection pipeline 100, thereby reducing the frequency of subsequent blockage, ensuring the coal injection volume of the coal injection pipeline 100, and improving the coal injection efficiency of the coal injection pipeline 100.

[0035] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A blast furnace pulverized coal injection pipe for preventing blockage, comprising a pulverized coal injection pipe (100), characterized in that: The pulverized coal injection pipe (100) is equipped with a cleaning mechanism (200) to prevent blockage; The cleaning mechanism (200) includes a slot (201) opened on the pulverized coal injection pipe (100), a pull-out stop (202) is provided in the slot (201), a sliding sleeve (203) is slidably provided on the stop (202), a moving part (205) is provided on the sliding sleeve (203), and a cleaning ring (204) that contacts the inner wall of the pulverized coal injection pipe (100) is connected to the moving part (205). The moving part (205) is used to drive the cleaning ring (204) to move back and forth in the pulverized coal injection pipe (100) to clean the coal dust.

2. The anti-clogging blast furnace pulverized coal injection pipe as described in claim 1, characterized in that: The movable component (205) includes an insert (2051) disposed at the bottom of the sliding sleeve (203), a slot (2052) is provided on the unblocking ring (204), the insert (2051) is inserted into the slot (2052), and a limit plate (2053) is provided at the bottom of the insert (2051), which can drive the stop (202) to move upward while the unblocking ring (204) remains stationary.

3. The anti-clogging blast furnace pulverized coal injection pipe as described in claim 1, characterized in that: The movable component (205) also includes a connecting block (2054) disposed on the upper part of the sliding sleeve (203), and the connecting block (2054) is provided with a handle (2055) for pulling the cleaning mechanism (200).

4. The anti-clogging blast furnace pulverized coal injection pipe as described in claim 1, characterized in that: The cleaning mechanism (200) includes a limiting groove (206) on one side of the pulverized coal pipeline (100) for limiting and fixing the sliding sleeve (203).

5. The anti-clogging blast furnace pulverized coal injection pipe as described in claim 1, characterized in that: The pulverized coal injection pipe (100) is provided with a clamping mechanism (300). The clamping mechanism (300) includes a movable shaft (301) located above the pulverized coal injection pipe (100). One end of the movable shaft (301) is threaded with a bolt (302). A pressure plate (303) is provided at the bottom of the bolt (302). The pressure plate (303) can be used to press down and fix the stop block (202).

6. The anti-clogging blast furnace pulverized coal injection pipe as described in claim 3, characterized in that: A connecting frame (401) is provided on the pulverized coal injection pipe (100), and a movable groove (402) is provided on the connecting frame (401). The connecting block (2054) is located in the movable groove (402).

7. A blast furnace pulverized coal injection pipe for preventing blockage as described in claim 6, characterized in that: The inner sidewall of the connecting frame (401) is symmetrically provided with slide rails (502), and both ends of the stop block (202) are provided with sliders (501) that slide with the slide rails (502) to facilitate the stability of the stop block (202) when it moves.

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