Intercommunication device for coal feeders

Abstract

The utility model discloses a coal feeder intercommunication device, and relates to the technical field of coal feeding, the coal feeder intercommunication device comprises a south coal feeder and a north coal feeder, the south coal feeder and the north coal feeder are oppositely arranged, a coal feeding pipe is arranged above the south coal feeder and the north coal feeder, the lower end of the coal feeding pipe is provided with a coal dropping pipe, and the south coal feeder and the north coal feeder are oppositely arranged. The number of the coal dropping pipes is two, the two coal dropping pipes are communicated with the south coal feeder and the north coal feeder respectively, the coal feeding pipes are internally provided with underpants pipes, the lower ends of the underpants pipes are communicated with the south coal feeder, and electric control gate valves are installed at the joints of the underpants pipes and the south coal feeder and the joints of the coal dropping pipes and the north coal feeder. According to the scheme, the problems that in the load increasing and reducing process of an existing unit, due to the fact that coal types need to be replaced, the response speed is low and generally needs about one hour, and meanwhile when the unit runs in a low-load mode, due to the fact that the calorific value of coal is low, the maximum output of the unit can be disqualified, and the assessment of capacity and electricity charge is likely to happen are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal feeding, in particular to a coal feeder intercommunication device. Background Technique

[0002] Under the existing technical conditions, for the operation of coal-fired power units, the flow rate of the coal feeder is mainly adjusted to meet the load carrying of the unit and the co-firing of economic coal types. In specific operations, generally, low-calorie coal and high-calorie coal are stored in different coal bunkers respectively, and then the flow rates of the coal feeders on both sides are adjusted according to needs for co-firing.

[0003] However, during the process of increasing or decreasing the load of the unit, due to the need to replace coal types, the response speed is slow, usually about 1 hour. At the same time, when the unit is operating at low load, due to the low calorific value of the coal, it may cause the maximum output of the unit to be unqualified and face the assessment of capacity electricity charges. Therefore, we propose a coal feeder intercommunication device to solve the problems mentioned above. Content of the Utility Model

[0004] The purpose of the utility model is to provide a coal feeder intercommunication device to solve the problems in the above background technique that during the process of increasing or decreasing the load of the existing unit, due to the need to replace coal types, the response speed is slow, usually about 1 hour. At the same time, when the unit is operating at low load, due to the low calorific value of the coal, it may cause the maximum output of the unit to be unqualified and face the assessment of capacity electricity charges.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A coal feeder intercommunication device includes a south-side coal feeder and a north-side coal feeder, and the south-side coal feeder and the north-side coal feeder are arranged opposite to each other. A coal feeding pipe is arranged above the south-side coal feeder and the north-side coal feeder. A coal dropping pipe is installed at the lower end of the coal feeding pipe. There are two coal dropping pipes, and the two coal dropping pipes are respectively communicated with the south-side coal feeder and the north-side coal feeder. A bifurcated pipe is arranged inside the coal feeding pipe, and the lower end of the bifurcated pipe is communicated with the south-side coal feeder. Electric control flap valves are installed at the joints of the bifurcated pipe, the coal dropping pipes with the south-side coal feeder and the north-side coal feeder.

[0006] Preferably, a south-side coal bunker feeding port is arranged at one end of the coal feeding pipe, a first north-side coal bunker feeding port is arranged at the other end of the coal feeding pipe, and a second north-side coal bunker feeding port is arranged at the upper end of the bifurcated pipe.

[0007] Preferably, a circular inspection window is arranged on the outer wall of the bifurcated pipe.

[0008] Preferably, the electric control slide valve includes a valve seat, a telescopic frame, a slide plate and an electric push rod. The telescopic frame is installed at the front end of the valve seat. The slide plate is arranged inside the valve seat, and the front end of the slide plate extends outside the valve seat. The electric push rod is installed at the front end of the telescopic frame, and the output end of the electric push rod is in transmission connection with the slide plate.

[0009] Preferably, belt conveyors are arranged inside both the south coal feeder and the north coal feeder. A driven roller is installed at one end inside the belt conveyor, and a driving roller is installed at the other end inside the belt conveyor. A steel solid six-row idler is arranged between the driven roller and the driving roller. Transmission covers are installed on the outer walls of both the south coal feeder and the north coal feeder. A first belt pulley is installed at one end inside the transmission cover, and a second belt pulley is installed at the other end inside the transmission cover. The first belt pulley is in transmission connection with the second belt pulley through a belt. An asynchronous motor is installed on the inner wall at one end of the transmission cover, and the output end of the asynchronous motor is in transmission connection with the first belt pulley.

[0010] Preferably, two observation windows are arranged on both sides of both the south coal feeder and the north coal feeder.

[0011] Preferably, extension plates are installed on the bottom surfaces on both sides of both the south coal feeder and the north coal feeder. Reinforcement plates are welded to the upper ends of the extension plates, and a plurality of reinforcement plates are provided.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. Through the transformation of the coal feeding system of the present utility model, the unit can adjust the calorific value of the coal in the coal mill more quickly during the load increase process, thereby improving the load response speed of the unit. Before the transformation, it took 1 hour to replace the coal with a higher calorific value to drive the load. Under the coordinated action of the bifurcated pipe and the electric control slide valve, it only takes 15 minutes to take effect after the transformation.

[0014] 2. By transforming the coal feeding system and installing a bifurcated pipe, the transportation of coal from the coal bunker to the coal feeder is made more flexible, allowing the calorific value of the coal fed into the furnace to be adjusted in a timely manner according to the load demand, which helps to ensure the blending of economic coal types throughout the plant, thereby improving economic benefits.

[0015] 3. Since when the unit is operating at low load, if the calorific value adjustment is not timely, it may lead to capacity electricity charge assessment. The present utility model improves the adaptability of the unit through transformation, so that the assessment requirements can also be met at low load, thereby avoiding or reducing the deduction of capacity electricity charges. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2Schematic diagram of the back structure of the present utility model;

[0018] Figure 3 Partial enlarged view of part A of the present utility model;

[0019] Figure 4 Schematic diagram of the internal structure of the drive cover of the present utility model;

[0020] In the figure: 1, south coal feeder; 2, north coal feeder; 3, coal feeding pipe; 301, coal dropping pipe; 4, south coal bunker feeding port; 5, first north coal bunker feeding port; 6, bifurcated pipe; 601, second north coal bunker feeding port; 602, circular inspection window; 7, electric control flap valve; 701, valve seat; 702, telescopic frame; 703, flap; 704, electric push rod; 8, belt conveyor; 9, driven roller; 10, steel solid six-unit idler; 11, drive cover; 111, first belt pulley; 112, second belt pulley; 113, belt; 12, asynchronous motor; 13, extension plate; 14, reinforcement plate; 15, observation window. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a coal feeder interconnection device, including a south coal feeder 1 and a north coal feeder 2, and the south coal feeder 1 and the north coal feeder 2 are arranged opposite to each other. A coal feeding pipe 3 is arranged above the south coal feeder 1 and the north coal feeder 2. A coal dropping pipe 301 is installed at the lower end of the coal feeding pipe 3. There are two coal dropping pipes 301, and the two coal dropping pipes 301 are respectively communicated with the south coal feeder 1 and the north coal feeder 2. A bifurcated pipe 6 is arranged inside the coal feeding pipe 3, and the lower end of the bifurcated pipe 6 is communicated with the south coal feeder 1. Electric control flap valves 7 are installed at the connection parts of the bifurcated pipe 6, the coal dropping pipe 301 with the south coal feeder 1 and the north coal feeder 2.

[0023] Please refer to Figure 1 , one end of the coal feeding pipe 3 is provided with a south coal bunker feeding port 4, the other end of the coal feeding pipe 3 is provided with a first north coal bunker feeding port 5, and the upper end of the bifurcated pipe 6 is provided with a second north coal bunker feeding port 601.

[0024] Please refer to Figure 1 , a circular inspection window 602 is arranged on the outer wall of the bifurcated pipe 6, and the circular inspection window 602 can observe the coal dropping condition of the bifurcated pipe 6.

[0025] Please refer to Figure 3The electric-controlled plug-in valve 7 includes a valve seat 701, a telescopic frame 702, a plug-in plate 703 and an electric push rod 704. The telescopic frame 702 is installed at the front end of the valve seat 701, the plug-in plate 703 is arranged inside the valve seat 701, and the front end of the plug-in plate 703 extends outside the valve seat 701. The electric push rod 704 is installed at the front end of the telescopic frame 702, and the output end of the electric push rod 704 is transmission-connected with the plug-in plate 703. The electric-controlled plug-in valve 7 is opened and closed by controlling the extension and retraction of the plug-in plate 703 by the electric push rod 704.

[0026] See also Figure 4 , a belt conveyor 8 is provided inside the south coal feeder 1 and the north coal feeder 2, a driven roller 9 is installed at one end of the belt conveyor 8, a driving roller is installed at the other end of the belt conveyor 8, and a steel solid six-link roller 10 is arranged between the driven roller 9 and the driving roller. A transmission cover 11 is installed on the outer wall of the south coal feeder 1 and the north coal feeder 2, a first pulley 111 is installed at one end of the transmission cover 11, and a second pulley 112 is installed at the other end of the transmission cover 11, the first pulley 111 is connected to the second pulley 112 through a belt 113, an asynchronous motor 12 is installed on the inner wall of one end of the transmission cover 11, and the output end of the asynchronous motor 12 is connected to the first pulley 111, the ends of the south coal feeder 1 and the north coal feeder 2 are both connected to the coal mill inlet, and the output end of the asynchronous motor 12 can drive the belt conveyor 8 to run and send the coal to the coal mill for subsequent processing.

[0027] See also Figure 1 Two observation windows 15 are provided on both sides of the south coal feeder 1 and the north coal feeder 2, and the observation windows 15 can be used to observe the coal conveying conditions of the coal feeders from the outside.

[0028] See also Figure 1 Extension plates 13 are installed on the bottom surfaces of both sides of the south coal feeder 1 and the north coal feeder 2. Reinforcement plates 14 are welded to the upper ends of the extension plates 13, and multiple reinforcement plates 14 are provided. The extension plates 13 and the reinforcement plates 14 ensure the stability of the placement of the coal feeder and the strength of the shell structure.

[0029] Working principle: When in use, on the basis of the original coal feeding pipe 3, a trousers pipe 6 is added from the north raw coal bunker to the south coal feeder, and an imported electric-controlled gate valve 7 is added at the same time. When the load is high, the south coal feeder 4 closes the electric-controlled gate valve 7 on the coal drop pipe 301 from the south coal bunker feeding port 4 of the coal feeding pipe 3 to the south coal feeder 1, and opens the electric-controlled gate valve 7 at the connection between the trousers pipe 6 and the south coal feeder 1, that is, the south and north coal feeders are simultaneously supplied with high-quality raw coal from the north coal bunker to operate, so as to meet the requirements of rapid response of capacity electricity.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A coal feeder intercommunication device, comprising a south coal feeder (1) and a north coal feeder (2), wherein the south coal feeder (1) and the north coal feeder (2) are arranged opposite to each other, and characterized in that: A coal feeding pipe (3) is arranged above the south coal feeder (1) and the north coal feeder (2), and a coal dropping pipe (301) is installed at the lower end of the coal feeding pipe (3). Two coal dropping pipes (301) are provided, and the two coal dropping pipes (301) are respectively connected to the south coal feeder (1) and the north coal feeder (2). A trousers pipe (6) is arranged inside the coal feeding pipe (3), and the lower end of the trousers pipe (6) is connected to the south coal feeder (1). An electric control gate valve (7) is installed at the connection between the trousers pipe (6), the coal dropping pipe (301), the south coal feeder (1) and the north coal feeder (2).

2. The coal feeder intercommunication device according to claim 1, characterized in that: One end of the coal feeding pipe (3) is provided with a south coal bunker feeding port (4), the other end of the coal feeding pipe (3) is provided with a first north coal bunker feeding port (5), and the upper end of the trousers pipe (6) is provided with a second north coal bunker feeding port (601).

3. The coal feeder intercommunication device according to claim 1, characterized in that: A circular inspection window (602) is provided on the outer wall of the trousers tube (6).

4. The coal feeder intercommunication device according to claim 1, characterized in that: The electrically controlled plug-in valve (7) comprises a valve seat (701), a telescopic frame (702), a plug-in plate (703) and an electric push rod (704); the telescopic frame (702) is mounted at the front end of the valve seat (701); the plug-in plate (703) is arranged inside the valve seat (701), and the front end of the plug-in plate (703) extends outside the valve seat (701); the electric push rod (704) is mounted at the front end of the telescopic frame (702), and the output end of the electric push rod (704) is transmission-connected to the plug-in plate (703).

5. The coal feeder intercommunication device according to claim 1, characterized in that: A belt conveyor (8) is provided inside the south coal feeder (1) and the north coal feeder (2). A driven roller (9) is installed at one end of the belt conveyor (8), and a driving roller is installed at the other end of the belt conveyor (8). A steel solid six-link roller (10) is provided between the driven roller (9) and the driving roller. A transmission cover (11) is installed on the outer wall of the south coal feeder (1) and the north coal feeder (2). A first belt pulley (111) is installed at one end of the transmission cover (11), and a second belt pulley (112) is installed at the other end of the transmission cover (11). The first belt pulley (111) is connected to the second belt pulley (112) through a belt (113). An asynchronous motor (12) is installed on the inner wall of one end of the transmission cover (11), and the output end of the asynchronous motor (12) is connected to the first belt pulley (111).

6. The coal feeder intercommunication device according to claim 1, characterized in that: Two observation windows (15) are provided on both sides of the south coal feeder (1) and the north coal feeder (2).

7. The coal feeder intercommunication device according to claim 1, characterized in that: Extension plates (13) are installed on the bottom surfaces of both sides of the south coal feeder (1) and the north coal feeder (2), and reinforcement plates (14) are welded to the upper ends of the extension plates (13), and a plurality of reinforcement plates (14) are provided.

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