Belt coal conveying mechanism for intercommunication of double raw coal bins

Abstract

The belt coal conveying mechanism comprises a conveying belt, a belt pulley A, a chain, a motor, a chain wheel, a carrier roller support, a speed measuring roller, a weighing sensor, a main body frame, a carrier roller and a belt pulley B, a motor is mounted on the main frame, an output end of the motor is fixedly connected with a chain wheel through a coupler, the chain wheel is in transmission connection with a belt pulley A through a chain, and the belt pulley A and a belt pulley B are coupled to two ends of the main frame respectively and jointly sleeved with a conveying belt. The belt coal conveying mechanism is arranged between gate valves and coal outlets of the two raw coal bins, the main body frame extends into the raw coal bins through holes of the raw coal bins, the motor drives the conveying belt to move, coal in the raw coal bin on one side is conveyed to the raw coal bin on the other side, and coal quality intercommunication and interconnection between the two raw coal bins are achieved. The problem of difficulty in switching coal types as fired in a power plant boiler is solved, and cost reduction and efficiency improvement are further realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal feeding technical field, concretely relates to a belt coal conveying mechanism for mutual communication of double bins of raw coal bin. BACKGROUND

[0002] Now, the coal market is in short supply, and the quality of coal is uneven, and the price difference of different coal quality is larger, so thermal power plants usually adopt the way of blending coal to improve the power generation benefit, and a part of low calorific value coal is blended to reduce the fuel cost. However, most of the units correspond to one raw coal bin for each coal mill, and only one coal type is stored in the bin, so when the coal type is switched, the old coal in the bin needs to be consumed and then the coal is added again, which cannot meet the requirement of rapid load change of the unit. Therefore, the quality of the coal into the furnace is limited, and the peak capacity of the boiler and the capacity of the poor coal are not strong.

[0003] In order to adapt to market demand, flexible transformation becomes the key to coal transformation. And the raw coal bin transformation has small engineering quantity, obvious effect and low cost compared with other flexible transformation projects, so it becomes the key project of unit flexibility transformation.

[0004] At present, the mainstream raw coal bin coal blending device transformation scheme includes raw coal bin partition plate bin transformation, shrimp bin outer bin transformation, etc. The raw coal bin partition plate bin transformation divides the original bin body into two parts, stores different coal types, controls the coal flow on both sides through the plug door, and has simple structure, but there may be the risk of load imbalance and increased coal blocking probability; the shrimp bin outer bin transformation changes part of the raw coal bin of the unit into a peak regulation bin and sets multiple outlets, which respectively convey coal to several coal mills, and has high coal blending accuracy, but the structure is complex, the engineering quantity is large, and the operation after transformation is complicated. Therefore, a safe, convenient and efficient coal blending transformation scheme is needed, which can realize accurate, real-time and rapid switching of coal types without affecting the safety of the structure of the raw coal bin, and solve the coal burning demand of the unit under different loads. UTILITY MODEL CONTENTS

[0005] In order to overcome the shortcomings in the prior art, the utility model provides a belt coal conveying mechanism for mutual communication of double bins of raw coal bin. The two raw coal bins are connected by the belt coal conveying mechanism, when one bin stores high-quality coal and the other bin stores poor-quality coal, according to the needs of different loads and depth peak regulation, the gate door of one bin is opened and the gate door of the other bin is closed, and the belt coal conveying mechanism realizes that two bins simultaneously provide one coal type in real time to the coal feeder according to the load, so as to adapt to the requirement of rapid load change of the unit, high load and minimum stable combustion load burn high calorific value coal, other load burn low calorific value coal, and improve the load response.

[0006] To solve the above technical problems, the utility model adopts the technical scheme: a belt coal conveying mechanism for double-bin intercommunication of raw coal bins, characterized by comprising a conveying belt, a belt pulley A, a chain, a motor, a sprocket, a carrier roller support, a speed measuring drum, a load cell, a main frame, carrier rollers and a belt pulley B.

[0007] Among them, the motor is installed on the main frame, the output end of the motor is fixedly connected with the sprocket through a shaft coupling, the sprocket is drivingly connected with the belt pulley A through the chain, the belt pulley A and the belt pulley B are respectively shaft-connected at both ends of the main frame and are jointly sleeved with the conveying belt, a group of carrier roller supports are fixedly connected to the main frame through bolts, a group of carrier rollers are installed on each carrier roller support, and a speed measuring drum and a load cell are arranged below one of the carrier roller supports.

[0008] Among them, the belt coal conveying mechanism for double-bin intercommunication of raw coal bins is arranged at the position between the gate valves of two raw coal bins and the coal outlets, one side of the two raw coal bins is close to the opening, and the main frame is arranged in the raw coal bin through the opening of the raw coal bin, and the main frame and the bin wall of the opening of the raw coal bin are fixedly connected through welding.

[0009] Among them, when the gate door of the left raw coal bin is opened and the gate door of the right raw coal bin is closed, part of the coal in the left raw coal bin enters the lower coal feeder and part of the coal falls on the belt coal conveying mechanism for double-bin intercommunication of raw coal bins, the conveying belt is driven to move by the motor, the coal is conveyed to the right raw coal bin, and falls into the corresponding coal feeder, and vice versa, when the gate door of the left raw coal bin is closed and the gate door of the right raw coal bin is opened, part of the coal in the right raw coal bin is conveyed to the left raw coal bin by the conveying belt.

[0010] Among them, the motor is arranged outside the raw coal bin, the belt pulley A is drivingly connected with the sprocket and the chain, and the motor is prevented from being in contact with the coal to cause coal jamming.

[0011] Among them, the rotating speed of the motor is matched with the rotating speed of the coal feeder, and the coal conveying capacity of the belt coal conveying mechanism meets the maximum output of the coal mill.

[0012] Among them, the carrier roller supports are arranged in parallel, each group of carrier rollers is hinged by three carrier rollers to form a groove type, the two ends are sealed, the three carrier rollers have good self-balancing property, jointly support the conveying belt, and the conveying belt can be prevented from deviating.

[0013] Among them, the support end of the speed measuring drum is fixedly connected with the carrier roller support, and the working end surface of the speed measuring drum is attached to the upper surface of the return of the conveying belt.

[0014] The weighing sensor is floatingly connected with the roller support, the weighing sensor is electrically connected with the speed measuring roller, the weight of the coal to be weighed above the conveying belt is measured according to the weighing sensor, and the conveying speed of the conveying belt is measured according to the speed measuring roller, so that the coal conveying flow of the belt coal conveying mechanism can be calculated.

[0015] The sealing cover is arranged on the periphery of the belt coal conveying mechanism for the double coal bins, and is used for preventing coal and dust from overflowing during the conveying process.

[0016] The belt coal conveying mechanism for the double coal bins is supported by the load-bearing frame supported on the ground.

[0017] By adopting the above technical scheme, the belt coal conveying mechanism for the double coal bins has the following beneficial effects:

[0018] The belt coal conveying mechanism for the double coal bins can realize the interconnection of the coal quality between the two coal bins, and quickly change the coal blending and burning, only by adding the belt coal conveying mechanism between the two coal bins without changing the original coal conveying system. One bin is used for storing high calorific value coal, and the other bin is used for storing low calorific value coal. The two bins can be interconnected to convey coal according to different load requirements, and the same type of coal is provided to the coal feeder according to the load. The belt coal conveying mechanism for the double coal bins has low modification cost, short modification period, small modification engineering quantity, and does not need to stop the furnace, so that the normal operation of the power plant is ensured, the construction process is safe and risk-free, and the power generation benefit is effectively improved.

[0019] The utility model will be described in detail below with reference to the drawings. DRAWINGS

[0020] Figure 1 It is a structure schematic diagram of the belt coal conveying mechanism for the double coal bins.

[0021] In the figure: 1-conveying belt, 2-pulley A, 3-chain, 4-motor, 5-sprocket, 6-roller support, 7-speed measuring roller, 8-weighing sensor, 9-main frame, 10-roller, 11-pulley B. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the implementation scheme of the utility model will be described in detail below with reference to the drawings.

[0023] As Figure 1As shown, a belt conveyor mechanism for interconnecting two raw coal bunkers is characterized by comprising a conveyor belt 1, a pulley A2, a chain 3, a motor 4, a sprocket 5, an idler support 6, a speed measuring roller 7, a weighing sensor 8, a main frame 9, an idler 10, and a pulley B11.

[0024] like Figure 1 As shown, a motor 4 is installed on the main frame 9. The output end of the motor 4 is fixedly connected to the sprocket 5 through a coupling. The sprocket 5 and the pulley A2 are connected by a chain 3. The pulley A2 and the pulley B11 are respectively shafted to both ends of the main frame 9 and are together fitted with a conveyor belt 1. The motor 4 can be driven in the forward or reverse direction. When the motor 4 is turned on, the sprocket 5 acts as the driving wheel to drive the pulley A2 to rotate. The pulley A2 is the first driven wheel and the pulley B11 is the second driven wheel. Together they act on the conveyor belt 1 to realize bidirectional transportation of coal.

[0025] like Figure 1 As shown, a set of roller brackets 6 are fixedly connected to the top of the main frame 9 by bolts. A set of rollers 10 are installed on each roller bracket 6. A speed measuring roller 7 and a weighing sensor 8 are installed below one of the roller brackets 6.

[0026] In one embodiment of this utility model, a belt conveyor mechanism for interconnection between two raw coal bunkers is set between the gate valve and the coal outlet of the two raw coal bunkers, with an opening on the side of the two raw coal bunkers that are close to each other. The main frame 9 extends into the raw coal bunker through the opening of the raw coal bunker, and the main frame 9 is fixed to the wall of the raw coal bunker with the opening by welding.

[0027] In one embodiment of this utility model, when the gate of the left raw coal bunker is open and the gate of the right raw coal bunker is closed, part of the coal in the left raw coal bunker enters the lower coal feeder, and part falls onto a belt conveyor mechanism for interconnection between the two raw coal bunkers. The motor 4 drives the conveyor belt 1 to move, transporting the coal to the right raw coal bunker and into the corresponding coal feeder. Conversely, when the gate of the left raw coal bunker is closed and the gate of the right raw coal bunker is open, part of the coal in the right raw coal bunker is transported to the left raw coal bunker by the conveyor belt 1.

[0028] In one embodiment of this utility model, the motor 4 is located outside the raw coal bunker and is driven by the pulley A2 of the chain wheel 5 and the chain 3 to avoid the motor 4 coming into contact with the coal and causing coal jamming.

[0029] In one embodiment of this utility model, the rotational speed of the motor 4 is matched with the rotational speed of the coal feeder, and the coal conveying capacity of the belt conveyor meets the maximum output of the coal mill.

[0030] In an embodiment of the utility model, the carrier roller support 6 is parallel, each group of carrier roller 10 is hinged by three carrier rollers 10 into a groove type, both ends are sealed, the three carrier rollers 10 have good self-balancing, jointly support the conveying belt 1, and can prevent the conveying belt 1 from deviation.

[0031] In an embodiment of the utility model, the support end of speed measuring roller 7 is fixedly connected with carrier roller support 6, and the working end surface of speed measuring roller 7 is attached to the upper surface of the return of conveying belt 1.

[0032] In an embodiment of the utility model, the weighing sensor 8 is floatingly connected with carrier roller support 6, the weighing sensor 8 is electrically connected with speed measuring roller 7, the weighing sensor 8 measures the weight of the coal to be weighed above conveying belt 1 as instantaneous flow, speed measuring roller 7 measures the transmission speed of conveying belt 1, and based on the instantaneous flow and the transmission speed, integral calculation is automatically carried out, and the coal flow per unit time of the belt coal conveying mechanism can be obtained.

[0033] In an embodiment of the utility model, the sealing cover is arranged on the periphery of the belt coal conveying mechanism for intercommunication of double coal bins, which is used for preventing coal and dust from overflowing in the conveying process.

[0034] In an embodiment of the utility model, the belt coal conveying mechanism for intercommunication of double coal bins is supported by the load-bearing frame supported on the ground.

[0035] In summary, the belt coal conveying mechanism for intercommunication of double coal bins has the following advantages: the belt coal conveying mechanism for intercommunication of double coal bins can realize intercommunication and interconnection of coal quality between two coal bins, and quickly change coal types, without changing the original coal conveying system, by only adding the belt coal conveying mechanism. One coal bin stores high-calorific-value coal, and the other coal bin stores low-calorific-value coal, the two coal bins can realize intercommunication of coal conveying according to the needs of different loads, and provide the same coal type suitable for the load to the coal feeder. The belt coal conveying mechanism for intercommunication of double coal bins has low modification cost, short modification period, small modification engineering quantity, and does not need to stop the furnace, thereby ensuring the normal operation of the power plant, and effectively improving the power generation benefit.

[0036] The specific embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the utility model.

Claims

1. A belt coal conveying mechanism for double-bunker intercommunication of raw coal bunker, characterized in that It includes conveying belt (1), pulley A (2), chain (3), motor (4), sprocket (5), roller support (6), speed measuring roller (7), weighing sensor (8), main frame (9), roller (10) and pulley B (11); Wherein, the main frame (9) is provided with a motor (4), the output end of the motor (4) is fixedly connected with the sprocket (5) through a shaft coupling, the sprocket (5) is drivingly connected with the pulley A (2) through the chain (3), the pulley A (2) and the pulley B (11) are respectively shaft-connected at two ends of the main frame (9) and are commonly sleeved with the conveying belt (1), a group of roller supports (6) are fixedly connected on the main frame (9) through bolts, a group of rollers (10) are installed on each roller support (6), a speed measuring roller (7) and a weighing sensor (8) are arranged below one of the roller supports (6); Wherein, the belt coal conveying mechanism for double coal bunker intercommunication of raw coal bunker is arranged at a position between the gate valve and the coal outlet of the two raw coal bunkers, the two raw coal bunkers are provided with openings on one side, and the main frame (9) extends into the raw coal bunker through the opening of the raw coal bunker, and the main frame (9) and the wall of the opening of the raw coal bunker are fixed by welding. Wherein, when the gate door of the left raw coal bunker is opened and the gate door of the right raw coal bunker is closed, part of the coal in the left raw coal bunker enters the lower coal feeder, and part of the coal falls on the belt coal conveying mechanism for double coal bunker intercommunication of raw coal bunker, the conveying belt (1) is driven by the motor (4) to convey the coal to the right raw coal bunker and fall into the corresponding coal feeder, and vice versa, when the gate door of the left raw coal bunker is closed and the gate door of the right raw coal bunker is opened, part of the coal in the right raw coal bunker is conveyed to the left raw coal bunker by the conveying belt (1).

2. The belt coal conveying mechanism for intercommunication of double coal bins according to claim 1, characterized in that The motor (4) is arranged outside the raw coal bunker, the pulley A (2) is driven by the sprocket (5) and the chain (3), and the motor (4) is prevented from being contacted with the coal to cause coal jamming.

3. The belt coal conveying mechanism for intercommunication of double coal bins according to claim 1, characterized in that The rotating speed of the motor (4) is matched with the rotating speed of the coal feeder, and the coal conveying capacity of the belt coal conveying mechanism meets the maximum output of the coal mill.

4. The belt coal conveying mechanism for intercommunication of double coal bins according to claim 1, characterized in that The roller supports (6) are arranged in parallel, each group of rollers (10) is hinged by three rollers (10) to form a groove type, and the rollers (10) commonly support the conveying belt (1).

5. The belt coal conveying mechanism for intercommunication of double coal bins according to claim 1, characterized in that The support end of the speed measuring roller (7) is fixedly connected with the roller support (6), and the working end surface of the speed measuring roller (7) is attached to the return upper surface of the conveying belt (1).

6. The belt coal conveying mechanism for intercommunication of double coal bins according to claim 1, characterized in that The weighing sensor (8) is floatingly connected with the roller support (6), the weighing sensor (8) is electrically connected with the speed measuring roller (7), the weight of the coal to be weighed above the conveying belt (1) is measured according to the weighing sensor (8), the conveying speed of the conveying belt (1) is measured according to the speed measuring roller (7), and the coal conveying flow of the belt coal conveying mechanism can be calculated.

7. The belt coal conveying mechanism for intercommunication between two coal bins of a raw coal bin according to claim 1, characterized in that The belt coal conveying mechanism for double coal bunker intercommunication of raw coal bunker is provided with a sealing cover for preventing coal and dust from overflowing during conveying.

8. The belt coal conveying mechanism for intercommunication of double coal bins of raw coal bin according to claim 1, characterized in that The belt coal conveying mechanism for double coal bunker intercommunication of raw coal bunker is supported by a load-bearing frame supported on the ground.

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