Polygonal coal drop pipe suitable for various coal types
By designing polygonal coal falling pipes and adjustable flow diversion devices, the problem of accumulation and blockage of traditional coal falling pipes when dealing with various coal types, and the problem of coal falling point offset caused by the inability to adjust the angle of the deflector, achieving more efficient and safe coal transportation.
Patent Information
- Application Number
- CN202420605911.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-27
AI Technical Summary
When traditional coal-falling pipes deal with a variety of coal types, especially coal types mainly composed of coal sludge and pulverized coal, they are prone to accumulation, wall hanging and blockage of coal entering the furnace, resulting in reduced production efficiency and equipment safety hazards. At the same time, the angle of the deflector cannot be adjusted, resulting in a deviation of the coal drop point and affecting production efficiency.
A polygonal coal-falling pipe is designed. By setting up a coal-falling plate and a coal-blocking plate on the coal-falling surface, the inner cross-sectional shape of the coal-falling pipe is changed to reduce the accumulation of coal at the corners and the hanging walls. At the same time, an adjustable flow guide device is provided in the material guide groove. By controlling the angle of the flow guide plate, the coal flow is ensured smoothly and the coal drop point is avoided.
It effectively avoids the accumulation and blockage of coal sludge and pulverized coal in the coal-falling pipe, improves the smoothness and production efficiency of coal flow, reduces dust and workers' labor intensity, and ensures the safe and stable operation of the equipment.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal dropping pipes, in particular to a polygonal coal dropping pipe suitable for various types of coal. Background Art
[0002] In recent years, the coal sources of domestic thermal power plants have been unstable. In order to reduce the cost of coal entering the power plant, the coal types entering the plant are large and the coal quality is poor. The proportion of coal slime, pulverized coal and other coal entering the plant has increased, the pressure of coal distribution in the plant is high, and the fluidity of the coal entering the coal unloading ditch is poor. When the coal transportation system is loading coal, the system is frequently blocked by coal, causing the unit to operate with a low coal level in the raw coal bin, affecting the safe and stable operation of the unit.
[0003] The coal drop pipe plays a connecting and guiding role in the coal transportation system. Its main function is to smoothly guide the coal flow conveyed by the upper belt to the lower belt without coal spillage, leakage or blockage in the process. When the coal entering the factory is mainly coal slime and pulverized coal, and the external moisture content reaches more than 14%, the fluidity of the coal entering the furnace is poor, and the coal entering the furnace will accumulate and hang on the wall inside the coal drop pipe. As time goes by, the coal drop pipe will be blocked. Traditional coal drop pipes are usually square coal drop pipes with high tension at the four corners. At the same time, in order to prevent the coal drop pipe from wearing and leaking, ceramic blocks with a size of 10*10MM are pasted on the inner wall of the coal drop pipe. Coal slime is prone to accumulation in the gaps between the ceramic blocks. Because of the hanging of coal at the corners of the coal surface, the coal accumulation in the coal drop pipe increases over time, the width of the coal drop pipe decreases, and the coal flow is large instantly, causing the coal drop pipe to become blocked. Blockage requires reducing the belt speed and the coal loading speed. If the coal drop pipe contains 40% coal slime and 60% medium coal and the moisture content of the coal entering the furnace is above 12%, the operation must be stopped and the accumulated coal inside the coal drop pipe must be cleaned. At the same time, the guide plate where the coal drop pipe enters the guide trough is a fixed guide plate, and the angle of the guide plate cannot be adjusted. When the type of coal changes, the coal drop point is easily offset due to the coal on the surface of the guide plate, and the coal loading speed is reduced, affecting production efficiency, polluting the on-site environment, and increasing the workload of personnel. This requires designing a new coal drop pipe to reduce the circulation tension and resistance of coal slime and pulverized coal in the coal drop pipe, avoid the accumulation of coal entering the furnace in the coal drop pipe, causing blockage of the coal drop pipe, and the inability to adjust the angle of the guide plate, resulting in the offset of the coal drop point. Utility Model Content
[0004] In order to solve the problems existing in the prior art, the utility model provides a polygonal coal drop pipe suitable for various types of coal, so as to avoid the problem that when the coal entering the furnace is mainly coal mud and pulverized coal, the coal drop pipe is accumulated, causing blockage and reduced production efficiency.
[0005] To solve the above problems, the technical solution of the utility model is as follows: a polygonal coal drop pipe suitable for various types of coal, one end of the coal drop pipe is connected to the upper belt and the other end is connected to the lower belt, including a head protection cover connected to the upper belt, a ship-type tee is connected to the bottom of the head protection cover, two coal drop pipes are connected to the bottom of the ship-type tee, a lower belt is provided below the coal drop pipe, a material guide trough is provided between the coal drop pipe and the lower belt, and a baffle assembly is provided on the coal facing surface of the coal drop pipe to prevent the accumulation of coal slime and pulverized coal, which turns the inner cross-section of the coal drop pipe into a polygon.
[0006] Furthermore, the baffle assembly includes three coal facing plates fixedly connected to three coal facing surfaces of the coal drop pipe, and coal baffle plates for preventing the accumulation of coal slime and pulverized coal are connected between adjacent coal facing plates.
[0007] Furthermore, the coal facing plate and the coal blocking plate are mirror composite plates.
[0008] Furthermore, the material guide trough includes a trough body, in which is provided a guide device for guiding the direction of the coal flow and causing the coal flow to fall into the middle of the lower belt. The guide device includes a fixed plate connected to the trough body with a gradually narrowing opening, and the fixed plate is provided with a guide mechanism for adjusting the direction of the coal flow.
[0009] Furthermore, the guide mechanism includes a control rod passing through the trough body and the fixed plate, and a guide plate rotatably connected to the fixed plate.
[0010] Furthermore, the control rod is a screw rod, which is threadedly connected to the trough body and the fixing plate.
[0011] Furthermore, a rotating handle is provided at one end of the control rod.
[0012] Furthermore, the guide plate is hinged to the fixed plate.
[0013] Furthermore, a leak-proof plate is provided at the bottom of the fixed plate to prevent coal from leaking out of the gap between the fixed plate and the lower belt.
[0014] Furthermore, a funnel is provided between the head protection cover and the boat-type tee.
[0015] Compared with the prior art, the utility model has the following beneficial effects: a coal facing plate and a coal blocking plate are provided to make the inner cross-section of the coal drop pipe into a polygon, so that the coal drop pipe can adapt to various types of coal. When the coal entering the furnace is mainly coal slime and pulverized coal, the coal is prevented from hanging on the wall and the coal is prevented from accumulating at the corners of the coal facing surface; a guide device is provided, and the angle of the guide plate is adjustable to prevent the problem of the coal drop point being offset when the coal entering the furnace is mainly coal slime and pulverized coal. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the material guide chute of the utility model;
[0018] Figure 3 This is a schematic diagram of the top view of the baffle assembly of the utility model.
[0019] Explanation of the reference numerals: 1 head protection cover, 2 funnel, 3 ship-type tee, 4 coal drop pipe, 5 lower belt, 6 material guide chute, 61 chute body, 62 fixing plate, 63 control rod, 64 guide plate, 65 rotating handle, 66 leak-proof plate, 7 coal facing plate, 8 coal blocking plate, 9 corner. DETAILED DESCRIPTION
[0020] like Figure 1 , Figure 2 , Figure 3 As shown, a polygonal coal drop pipe suitable for various types of coal includes a head protection cover 1 connected to an upper belt, a funnel 2 is connected to the bottom of the head protection cover 1, and a ship-type tee 3 is connected to the bottom of the funnel 2 to play the role of switching the coal drop pipes. The ship-type tee 3 is a prior art and will not be described in detail. Two coal drop pipes 4 are connected to the bottom of the ship-type tee 3, a lower belt 5 is provided below the coal drop pipes 4, a material guide trough 6 is provided between the coal drop pipe 4 and the lower belt 5, and a baffle assembly is provided on the coal facing surface of the coal drop pipe 4 to prevent the accumulation of coal slime and pulverized coal and to change the inner cross-section of the coal drop pipe 4 into a polygon.
[0021] like Figure 3 As shown, the baffle assembly includes three coal facing plates 7 fixedly connected to the three coal facing surfaces of the coal dropping pipe 4, and coal blocking plates 8 for preventing the accumulation of coal slime and pulverized coal are connected between adjacent coal facing plates 7. The coal facing plates 7 and the coal blocking plates 8 are mirror composite plates, and stainless steel can also be used; the coal facing surfaces are changed from three adjacent surfaces of the traditional coal dropping pipe 4 to three coal facing plates 7 plus two coal blocking plates 8, a total of five coal facing surfaces, and the degree of the corner 9 is changed from two 90° to four angles greater than 90°, the tension of the corner 9 becomes smaller, and coal is not easy to accumulate on the corner 9. At the same time, the gap between the coal facing plates 7 is greatly reduced, and coal is not easy to accumulate on the side wall.
[0022] like Figure 2 As shown, the material guide trough 6 includes a trough body 61, in which a guide device is provided for guiding the direction of the coal flow and causing the coal flow to fall into the middle of the lower belt 5. The guide device includes a fixed plate 62 connected to the trough body 61 with a gradually narrowing opening, and a guide mechanism for adjusting the direction of the coal flow is provided on the fixed plate 62.
[0023] The guide mechanism includes a control rod 63 passing through the groove body 61 and the fixed plate 62 , and a guide plate 64 rotatably connected to the fixed plate 62 . The guide plate 64 and the fixed plate 62 can be hinged. A rotating handle 65 is provided at one end of the control rod 63 .
[0024] The control rod 63 is a screw rod, which is threadedly connected to the trough body 61 and the fixing plate 62 to increase the contact surface between the screw rod and the trough body 61 and the fixing plate 62 to prevent the guide plate 64 from automatically retreating under the impact of the coal entering the furnace. A partially threaded screw rod can also be used to ensure that the guide plate 64 will not retreat.
[0025] A leak-proof plate 66 is provided at the bottom of the fixed plate 62 to prevent coal from leaking out of the gap between the fixed plate 62 and the lower belt 5 .
[0026] Working principle: the upper belt conveys the incoming coal into the head protection cover 1, and enters the coal drop pipe 4 through the funnel 2 and the ship-type tee 3. The incoming coal slides downward along the coal facing plate 7 and the coal blocking plate 8 in the coal drop pipe 4 to the guide trough 6. According to the position of the coal dropping point on the lower belt 5, the angle of the guide plate 64 is adjusted to make the coal dropping point located in the middle of the lower belt 5 to complete the conveying of the incoming coal. When the incoming coal falls in the coal drop pipe 4, the corner 9 between the coal facing plate 7 and the coal blocking plate 8 as the coal facing surface is greater than 90°, the tension of the corner 9 is relatively small, and there are fewer gaps on the coal facing plate 7. The incoming coal is not easy to accumulate or hang on the wall, and the efficiency of conveying the incoming coal is greatly improved, dust is reduced, the labor intensity of workers is reduced, and production efficiency is improved.
[0027] The above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A polygonal coal drop pipe suitable for various types of coal, one end of the coal drop pipe is connected to the upper belt and the other end is connected to the lower belt, characterized in that: It includes a head protection cover connected to the upper belt, a ship-type tee is connected to the bottom of the head protection cover, two coal dropping pipes are connected to the bottom of the ship-type tee, a lower belt is arranged below the coal dropping pipe, a material guide trough is arranged between the coal dropping pipe and the lower belt, and a baffle assembly is arranged on the coal facing surface of the coal dropping pipe to prevent the accumulation of coal slime and pulverized coal and to change the inner cross-section of the coal dropping pipe into a polygon.
2. The polygonal coal drop pipe suitable for various types of coal according to claim 1, characterized in that: The baffle assembly includes three coal facing plates fixedly connected to three coal facing surfaces of the coal drop pipe, and coal baffle plates for preventing the accumulation of coal slime and pulverized coal are connected between adjacent coal facing plates.
3. The polygonal coal drop pipe suitable for various types of coal according to claim 2, characterized in that: The coal facing plate and the coal blocking plate are mirror composite plates.
4. The polygonal coal drop pipe suitable for various types of coal according to claim 1, characterized in that: The material guide trough includes a trough body, in which is provided a guide device for guiding the direction of coal flow and causing the coal flow to fall into the middle of the lower belt. The guide device includes a fixed plate connected to the trough body with a gradually narrowing opening, and a guide mechanism for adjusting the direction of coal flow is provided on the fixed plate.
5. The polygonal coal drop pipe suitable for various types of coal according to claim 4, characterized in that: The flow guide mechanism comprises a control rod passing through the slot body and the fixing plate, and a flow guide plate rotatably connected to the fixing plate.
6. The polygonal coal drop pipe suitable for various types of coal according to claim 5, characterized in that: The control rod is a screw rod, which is threadedly connected with the tank body and the fixing plate.
7. The polygonal coal drop pipe suitable for various types of coal according to claim 6, characterized in that: A rotating handle is arranged at one end of the control rod.
8. The polygonal coal drop pipe suitable for various types of coal according to claim 7, characterized in that: The guide plate is hinged to the fixing plate.
9. The polygonal coal drop pipe suitable for various types of coal according to claim 8, characterized in that: A leak-proof plate is provided at the bottom of the fixed plate to prevent coal from leaking out of the gap between the fixed plate and the lower belt.
10. The polygonal coal drop pipe suitable for various types of coal according to claim 1, characterized in that: A funnel is arranged between the head protection cover and the boat-type tee.