Modularized fast-assembly straw-section-shaped anti-blocking wear-resistant coal dropping pipe

Abstract

The utility model relates to the technical field of coal drop pipes, in particular to a modularized fast-assembly straw-section-shaped anti-blocking wear-resistant coal drop pipe which comprises a high-pressure air pipe, a coal drop pipe inlet section and a plurality of coal drop pipe middle sections sequentially connected to the lower end of the coal drop pipe inlet section. Air nozzles communicated with the interiors of the middle sections of the coal drop pipes are arranged at the joints of the middle sections of every two adjacent coal drop pipes, and the high-pressure air pipes are communicated with the air nozzles. When coal materials entering the coal dropping pipe are bridged and unsmooth in coal dropping and coal blocking is caused, high-pressure compressed air is sprayed out through the air nozzle preset in the middle section of the coal dropping pipe to form strong air flow, coal briquettes and obstacles at the coal blocking position in the coal dropping pipe are rapidly impacted or loosened, and therefore the fluidity of the coal materials is rapidly recovered.

Description

Technical Field

[0001] This utility model relates to the field of coal chutes technology, specifically to a modular, quick-assembly, straw-section-shaped, anti-clogging, and wear-resistant coal chute. Background Technology

[0002] In a coal conveying system, the coal chute is a crucial component, and its performance directly affects the normal operation of the entire coal conveying system.

[0003] The main structural forms of coal chutes are rectangular trough structures and circular tube structures. From the perspective of coal flowability, the circular tube structure has certain advantages. In rectangular trough structures, coal flow is prone to forming dead zones at corners, leading to coal accumulation and increasing the risk of coal blockage. The circular tube structure, however, allows for smoother coal flow and reduces the formation of dead zones. From a manufacturing perspective, the manufacturing process for circular tube structures is relatively mature, making it easier to ensure the dimensional accuracy and quality stability of the coal chutes. In recent years, based on these advantages, coal chutes have mostly been designed as circular tube structures. This design, to some extent, alleviates coal blockage and reduces the problem of coal transportation system interruptions caused by coal blockage.

[0004] However, coal blockage still exists in the online coal chute. Due to the influence of the coal market, the quality of coal burned by power plants has changed frequently in recent years. In addition, the summer rainy season has a large amount of moisture in the coal, which is wet and sticky, and it is easy to stick to the inner wall of the boiler coal chute, causing coal to swell and coal to be cut off inside the coal chute, which seriously affects the normal operation of the boiler. Utility Model Content

[0005] The purpose of this utility model is to provide a modular, quick-installing, straw-shaped, anti-clogging, and wear-resistant coal chuting pipe, which solves the problem in the prior art that the inner wall of the coal chuting pipe is prone to coal bridging and coal breakage due to coal quality issues, seriously affecting the normal operation of the boiler.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A modular, quick-assembly, straw-section-shaped, anti-clogging, and wear-resistant coal chutes includes a high-pressure air pipe, a coal chutes inlet section, and several intermediate coal chutes connected sequentially to the lower end of the coal chutes inlet section. At the connection point of two adjacent intermediate coal chutes, an air nozzle connected to the interior of the intermediate coal chutes is provided, and the high-pressure air pipe is connected to the air nozzle.

[0008] A further technical solution is to expand the upper end of the middle section of the coal chute outward to form a funnel mouth, and insert the lower end of the upper middle section of the coal chute into the funnel mouth of the lower middle section of the coal chute.

[0009] A further technical solution is to install a second connecting ring on the outer wall of the middle section of the coal chute near the lower end, and the lower end of the middle section of the coal chute located above is connected to the bell mouth through the second connecting ring.

[0010] A further technical solution is to design the middle section of the coal chute as a conical tube structure with a diameter that gradually decreases from top to bottom.

[0011] A further technical solution is to connect the outer edge of the second connecting ring to the flared opening by welding.

[0012] A further technical solution is to align the jet nozzle with the horn mouth through the air inlet on the second connecting ring.

[0013] A further technical solution is to provide a first connecting ring on the inner wall surrounding the flared opening, and to connect the first connecting ring and the second connecting ring by bolts.

[0014] A further technical solution is that a jet ring is fitted to the lower side of the second connecting ring, and an air chamber is provided inside the jet ring. A high-pressure air pipe passes through the second connecting ring and the first connecting ring in sequence and is connected to the air chamber. A jet nozzle is installed on the lower side of the jet ring and is connected to the air chamber. Several jet nozzles are provided along the lower side of the jet ring.

[0015] A further technical solution is that the upper side of the second connecting ring is connected to the outer wall of the middle section of the coal chute through reinforcing ribs.

[0016] A further technical solution is to install a wear-resistant layer on the inner wall of the middle section of the coal chute.

[0017] Compared with the prior art, the beneficial effects of this utility model are: when the coal entering the coal chute is blocked due to bridging, the high-pressure compressed air is sprayed out by the jet nozzle in the middle section of the coal chute to form a strong airflow, which quickly impacts or loosens the coal block and obstruction in the coal chute, thereby allowing the coal to quickly restore its fluidity. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of a modular, quick-assembly, straw-section-shaped, anti-clogging, and wear-resistant coal chuting pipe according to this utility model.

[0019] Figure 2 for Figure 1 A cross-sectional view of point A in the diagram.

[0020] Figure 3 for Figure 1 Another cross-sectional view of point A in the middle.

[0021] Figure 4 This is another overall schematic diagram of a modular, quick-installing, straw-section-shaped, anti-clogging, and wear-resistant coal chuting pipe according to this utility model.

[0022] Icons: 1-High-pressure air pipe, 2-Coal chute inlet section, 3-Middle section of coal chute, 4-Air nozzle, 5-Flare mouth, 6-First connecting ring, 7-Bolt, 9-Second connecting ring, 10-Air nozzle ring, 11-Air chamber, 12-Reinforcing rib. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Figures 1 to 4 The following is an embodiment of the present invention.

[0025] Example:

[0026] A modular, quick-assembly, segment-shaped, anti-clogging, and wear-resistant coal chute includes a high-pressure air pipe 1, a coal chute inlet section 2, and several intermediate coal chute sections 3 connected sequentially to the lower end of the inlet section 2. Air nozzles 4, communicating with the interior of each adjacent intermediate coal chute section 3, are installed at the connection points of adjacent intermediate coal chute sections 3. The high-pressure air pipe 1 is connected to the air nozzles 4. When coal entering the coal chute becomes blocked due to bridging, high-pressure compressed air is ejected from the air nozzles 4 pre-installed in the intermediate coal chute sections 3 to form a strong airflow. This airflow quickly impacts or loosens the coal blocks and obstructions at the blockage location within the coal chute, thereby rapidly restoring the fluidity of the coal.

[0027] The upper end of the middle section 3 of the coal chute expands outward to form a funnel 5. The lower end of the upper middle section 3 of the coal chute is inserted into the funnel 5 of the lower middle section 3 of the coal chute. The purpose of setting the funnel 5 is to form an air ring at this point with the inserted part of the upper middle section 3 of the coal chute. High-pressure air entering through the nozzle 4 can enter the blocked coal seam, impact the coal seam, and achieve the purpose of clearing the blockage.

[0028] Besides the scheme of expanding the upper end of the middle section 3 of the coal chute outward to form a funnel mouth 5, other methods can also be used, such as... Figure 4 As shown, the design of the middle section 3 of the coal chute gradually decreasing in diameter from top to bottom can form a good transition at the connection and form a clear air ring in conjunction with the jet nozzle 4.

[0029] A second connecting ring 9 is provided on the outer wall of the middle section 3 of the coal chute near the lower end. The lower end of the middle section 3 of the coal chute, which is located above, is connected to the bell mouth 5 through the second connecting ring 9.

[0030] The outer edge of the second connecting ring 9 is connected to the flared opening 5 by welding. Welding improves the strength of the connection between the second connecting ring 9 and the flared opening 5.

[0031] The nozzle 4 is aligned with the horn 5 through the air inlet on the second connecting ring 9. The nozzle 4 is aligned between the inner wall of the horn 5 and the outer wall of the middle section 3 of the upper coal drop pipe through the air inlet. In this way, the coal block will not hit the nozzle 4 during the fall, but the gas sprayed by the nozzle 4 can form a downward airflow in the horn 5 to drive the coal block down and clean the coal dust on the inner wall of the middle section 3 of the coal drop pipe.

[0032] A first connecting ring 6 is provided around the inner wall of the flared opening 5, and the first connecting ring 6 and the second connecting ring 9 are fixedly connected by bolts 7. The bolt connection method is a supplementary method to the welding connection, and is secondary to the welding connection.

[0033] By setting the first connecting ring 6 and the second connecting ring 9, the two coal chutes' middle sections 3 can be well connected together. The lower end of the upper coal chute's middle section 3 will partially pass through the flared opening 5, positioned below the first connecting ring 6 and the second connecting ring 9. This improves upon the traditional flange connection, which has gaps at the connection point, easily accumulating coal dust and allowing coal chunks to get stuck. Using this straw-like connection for the coal chute's middle section 3, coal chunks will not contact the gaps at the connection point of the middle section 3 during the entire descent process, reducing the probability of coal chunks getting stuck.

[0034] A jet ring 10 is fitted to the lower side of the second connecting ring 9. An air chamber 11 is located within the jet ring 10. A high-pressure air pipe 1 passes through the second connecting ring 9 and the first connecting ring 6, connecting to the air chamber 11. A jet nozzle 4 is installed on the lower side of the jet ring 10 and is connected to the air chamber 11. Several jet nozzles 4 are arranged along the lower side of the jet ring 10. By installing the jet ring 10, multiple jet nozzles 4 can be installed, allowing for simultaneous jetting around the inner wall of the horn opening 5 during jetting. This creates a downward impact airflow that adheres to the inner wall of the middle section 3 of the coal drop pipe, dislodging stuck coal chunks and clearing coal dust from the inner wall of the middle section 3.

[0035] The upper side of the second connecting ring 9 is connected to the outer wall of the middle section 3 of the coal chute via a reinforcing rib 12. By setting the reinforcing rib 12, the connection strength between the second connecting ring 9 and the middle section 3 of the coal chute can be improved, and after the first connecting ring 6 and the second connecting ring 9 are connected, they can provide support for the first connecting ring 6.

[0036] The inner wall of the middle section 3 of the coal chute is provided with a wear-resistant layer. The middle section 3 of the coal chute consists of an outer low-carbon steel plate substrate and an inner wear-resistant layer. During operation, the low-carbon steel plate substrate provides comprehensive properties such as strength, toughness, and plasticity to resist external forces, while the wear-resistant layer provides wear resistance and heat resistance to meet the requirements of specified working conditions.

[0037] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A modular, quick-assembly, straw-section-shaped, anti-clogging, wear-resistant coal chuting pipe, characterized in that, It includes a high-pressure air pipe (1), a coal chutes inlet section (2), and several coal chutes intermediate sections (3) connected in sequence to the lower end of the coal chutes inlet section (2). At the connection point of two adjacent coal chutes intermediate sections (3), there is a jet nozzle (4) that communicates with the inside of the coal chutes intermediate section (3). The high-pressure air pipe (1) is connected to the jet nozzle (4).

2. The modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 1, characterized in that: The upper end of the middle section (3) of the coal chute expands outward to form a flared mouth (5), and the lower end of the middle section (3) of the upper coal chute is inserted into the flared mouth (5) of the middle section (3) of the lower coal chute.

3. The modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 1, characterized in that: The middle section (3) of the coal chute is a conical tube structure whose diameter gradually decreases from top to bottom.

4. The modular quick-assembly straw-section anti-clogging and wear-resistant coal chuting pipe according to claim 2, characterized in that: A second connecting ring (9) is provided on the outer wall of the middle section (3) of the coal chute near the lower end. The lower end of the middle section (3) of the coal chute placed above is connected to the bell mouth (5) through the second connecting ring (9).

5. A modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 4, characterized in that: The outer edge of the second connecting ring (9) is connected to the flared mouth (5) by welding.

6. A modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 4, characterized in that: The jet nozzle (4) is aligned with the horn mouth (5) through the air inlet on the second connecting ring (9).

7. A modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 4, characterized in that: A first connecting ring (6) is provided on the inner wall surrounding the horn opening (5), and the first connecting ring (6) and the second connecting ring (9) are fixedly connected by bolts (7).

8. A modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 7, characterized in that: A jet ring (10) is fitted to the lower side of the second connecting ring (9). An air chamber (11) is provided inside the jet ring (10). The high-pressure air pipe (1) passes through the second connecting ring (9) and the first connecting ring (6) in sequence and is connected to the air chamber (11). The jet nozzle (4) is installed on the lower side of the jet ring (10) and is connected to the air chamber (11). Several jet nozzles (4) are provided along the lower side of the jet ring (10).

9. A modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 4, characterized in that: The upper side of the second connecting ring (9) is connected to the outer wall of the middle section (3) of the coal drop pipe by a reinforcing rib (12).

10. A modular, quick-assembly, straw-section, anti-clogging, and wear-resistant coal chuting pipe according to claim 1, characterized in that: The inner wall of the middle section (3) of the coal chute is provided with a wear-resistant layer.

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