Purging device for inlet slide plate gate channel of coal feeder

Abstract

The utility model relates to a coal feeder inlet slide plate gate channel purging device which comprises a coal feeder body, a slide plate gate, a transverse channel and a purging mechanism, the coal feeder body is provided with a vertical channel, the transverse channel is installed on one side of the coal feeder body and communicates with the middle of the vertical channel, the slide plate gate is horizontally arranged in the coal feeder body in a sliding mode, and the purging mechanism is arranged on the slide plate gate. The slide plate gate can horizontally slide to the middle part of the vertical channel or horizontally slide into the transverse channel; a cover plate is arranged at the end of the transverse channel, the blowing mechanism comprises an air blowing pipe and a compressed air conveying assembly, the air blowing pipe is arranged on the cover plate, one end of the air blowing pipe is located in the transverse channel, one end opening of the air blowing pipe faces the sliding direction of the sliding plate door, and the compressed air conveying assembly is used for conveying compressed air into the air blowing pipe. According to the device, coal carried on one side of the slide plate gate or accumulated coal in the transverse channel can be purged, so that the coal downwards slides into the vertical channel along the transverse channel, and blockage is reduced.

Description

Technical Field

[0001] The present application relates to the field of auxiliary equipment of thermal power generating sets, and in particular to a coal feeder inlet plug-in door channel purge device. Background Art

[0002] The coal feeder is used in the coal-fired furnace pulverizing system of a thermal power plant to continuously deliver coal for boiler combustion. It is an essential auxiliary machine for thermal power generating units. The coal feeder entrance gate is the connecting passage between the raw coal bunker and the coal feeder. Whether it is unobstructed determines the coal feeding condition of the coal feeder and directly affects the combustion stability of the unit.

[0003] The gate door on the coal feeder serves to separate the raw coal bin and the coal feeder. Specifically, the coal feeder has a vertical channel, which is used to ensure that the coal can be transported downward and fall, and the gate door is horizontally arranged in the middle of the vertical channel. The coal feeder is also provided with a transverse channel, which is connected to the middle of the vertical channel. When the gate door is located in the middle of the vertical channel, it blocks the vertical channel and prevents the coal from moving downward, and the coal is in a stopped state. When the transportation needs to be started, the gate door moves horizontally into the transverse channel to remove the obstruction to the vertical channel, and the coal can be transported downward normally.

[0004] However, every time the gate is opened and closed, coal powder will be brought into the horizontal channel. Over time, too much coal powder will accumulate in the horizontal channel, which may easily cause the gate to be unable to open and close normally. In addition, if the gate cannot be opened and closed normally in an emergency, it will seriously affect the normal operation of the coal feeder and even the normal operation of the generator set.

[0005] Therefore, the coal feeder needs to be stopped at regular intervals, and then the horizontal channel needs to be opened. The accumulated coal powder needs to be cleaned out or pushed into the vertical channel using tools such as pry bars and poking rods to clear the blockage. This method has the problems of large workload and affects production efficiency. Utility Model Content

[0006] In order to reduce the impact of coal powder accumulation on the normal opening and closing of the gate door, the present application provides a coal feeder inlet gate door channel purge device.

[0007] The present application provides a coal feeder inlet gate channel purge device, which adopts the following technical solution:

[0008] A coal feeder inlet plug-in door channel purging device comprises a coal feeder body, a plug-in door, a transverse channel and a purging mechanism, wherein the coal feeder body has a vertical channel, the transverse channel is installed on one side of the coal feeder body, the transverse channel is connected with the middle part of the vertical channel, the plug-in door is horizontally slidably arranged in the coal feeder body, the plug-in door can slide horizontally to the middle part of the vertical channel or slide horizontally into the transverse channel; a cover plate is provided at the end of the transverse channel, the purging mechanism comprises an air blowing pipe and a compressed air delivery assembly, the air blowing pipe is arranged on the cover plate, one end of the air blowing pipe is located in the transverse channel, one end of the air blowing pipe faces the sliding direction of the plug-in door, and the compressed air delivery assembly is used for delivering compressed air into the air blowing pipe.

[0009] By adopting the above technical solution, when clearing is required, the compressed air delivery component injects compressed air into the blowing pipe, and the blowing pipe blows the compressed air to one side of the plug-in door to sweep the accumulated coal in the area between one side of the plug-in door and the horizontal channel, so that it slides down along the horizontal channel into the vertical channel, thereby reducing blockage and solving the problem that the accumulated coal at the end of the plug-in door cannot be cleared externally, requiring shutdown and manual cleaning. The work efficiency is greatly improved, manpower is liberated, and the operation risk is reduced.

[0010] Optionally, there are two air blowing pipes, which are respectively located at 1 / 3 and 2 / 3 of the length direction of the cover plate.

[0011] By adopting the above technical solution and setting a plurality of air blowing pipes, the range of air blowing can be increased, thereby improving the completeness of clearing blockages and reducing the occurrence of residual corners.

[0012] Optionally, the compressed air delivery assembly includes a metal hose and an external air pipe, wherein the external air pipe is located above the transverse channel, one end of the metal hose is connected to the end of the air blowing pipe exposed to the transverse channel, and the other end of the metal hose is connected to the external air pipe, and the external air pipe is provided with a switch valve, which includes a solenoid valve.

[0013] By adopting the above technical solution and setting up a solenoid valve, the control system can be linked to control the injection of compressed air according to the opening timing of the plug door, or to perform timed injection to achieve automatic purging.

[0014] Optionally, the switch valve further includes a ball valve, which is arranged in parallel with the solenoid valve.

[0015] By adopting the above technical solution and setting a ball valve, the compressed air can be manually controlled, thereby increasing the applicability of the device.

[0016] Optionally, the total compressed air pressure of the blowing pipe is greater than f, f=μ*ρ*V*g, where μ is the friction coefficient of coal on the steel plate, ρ is the apparent density of coal, V is the inner cavity volume of the transverse channel, and g is the acceleration of gravity.

[0017] By adopting the above technical solution, the total pressure of the compressed air is greater than the friction of the accumulated coal, and the accumulated coal can be effectively blown away to reduce the residual accumulated coal.

[0018] Optionally, a port of the blowing pipe located in the transverse channel is provided with a flap, the surface area of ​​one side of the flap is greater than or equal to the cross-sectional area of ​​the port of the blowing pipe, and the upper part of the flap is hingedly connected to the port of the blowing pipe; the flap is in a vertical state under the action of gravity and blocks the port of the blowing pipe; the compressed air blown out by the blowing pipe forces the flap to deflect upward.

[0019] By adopting the above technical solution and arranging a flap, when there is no blowing, the flap closes the port of the blowing pipe to reduce the probability of coal being pushed into the blowing pipe and causing blockage when the plug door moves.

[0020] Optionally, the cover plate is penetrated by a through hole, the through hole is larger than the outer diameter of the blowing pipe, the blowing pipe is connected to the through hole, a sealing ring is fixed on the outer circumference of the blowing pipe, and the outer circumference of the sealing ring fits the inner circumference of the through hole.

[0021] By adopting the above technical solution, when the coal accumulation blockage position is far away from the air blowing pipe and the compressed air is difficult to blow the coal accumulation away, the air blowing pipe can be moved toward the direction of the plug-in door, and at the same time, the connection between the sealing ring and the through hole can be released, and the movement and collision of the air blowing pipe can be used to clear or break the coal accumulation to destroy the overall stability of the coal accumulation, and then the compressed air blowing can be combined to sweep away the unstable coal accumulation, thereby improving the clearing effect.

[0022] Optionally, a through hole is penetrated through the cover plate, the through hole is larger than the outer diameter of the blowing pipe, and the blowing pipe is connected to the through hole; a first guide ring is fixedly mounted on the outer circumference of the blowing pipe, and a second guide ring is coaxially fixed on the inner circumference of the through hole, the first guide ring and the second guide ring are both made of stainless steel, the outer diameter of the first guide ring is larger than the inner diameter of the second guide ring, and the inner diameter of the second guide ring is larger than the outer diameter of the blowing pipe; a first inclined surface is provided on the end surface of the first guide ring facing away from the vertical channel, and a second inclined surface is provided on the end surface of the second guide ring facing the vertical channel, the second inclined surface is in contact with the first inclined surface, and a compression spring is detachably provided between the outer circumference of the blowing pipe and the cover plate, and the compression spring is used to force the blowing pipe to move outward.

[0023] By adopting the above technical solution, a relatively stable metal seal is formed through the cooperation of the first guide ring and the second guide ring, as well as the elastic force of the compression spring.

[0024] Secondly, when the coal accumulation blockage position is far away from the air blowing pipe and the compressed air is difficult to blow the coal accumulation away, the compression spring can be released to make the air blowing pipe free, and the air blowing pipe can be quickly moved toward the gate. The movement and collision of the air blowing pipe can be used to clear or break holes in the coal accumulation to destroy the overall stability of the coal accumulation, and then the compressed air can be used to sweep away the unstable coal accumulation, thereby improving the clearing effect.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] By setting up a purge mechanism, the compressed air delivery component injects compressed air into the blowing pipe, and the blowing pipe blows the compressed air to one side of the gate to purge the coal accumulation in the area between the gate and the transverse channel, so that the coal will slide down along the transverse channel into the vertical channel, thereby reducing blockage and solving the problem that the coal accumulation at the end of the gate cannot be cleared externally, requiring shutdown and manual cleaning. The work efficiency is greatly improved, manpower is liberated, and the operation risk is reduced.

[0027] By setting multiple air blowing pipes and specific positions, the air blowing range can be expanded, thereby improving the completeness of clearing blockages and reducing the occurrence of residual corners;

[0028] By setting up a solenoid valve, it can be linked to the control system to control the injection of compressed air according to the opening timing of the plug door, or to inject it at a fixed time to achieve automatic purging. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0030] Figure 2 It is a cross-sectional view of the overall structure of Example 1.

[0031] Figure 3 It is a partial schematic diagram of Example 1 for reflecting the matching relationship between the air blowing pipe and the cover plate.

[0032] Figure 4 It is a front view of Example 1, which is used to reflect the matching relationship between the air blowing pipe and the cover plate.

[0033] Figure 5 It is a partial schematic diagram of Example 2 for illustrating the matching relationship between the air blowing pipe and the cover plate.

[0034] Figure 6 It is a partial schematic diagram of Example 3 for reflecting the matching relationship between the air blowing pipe and the cover plate.

[0035] Figure 7 It is a partial schematic diagram of Example 4 for illustrating the matching relationship between the air blowing pipe and the cover plate.

[0036] Explanation of the reference numerals: 1. Coal feeder body; 2. Insert door; 11. Vertical channel; 12. Horizontal channel; 13. Cover plate; 131. Through hole; 31. Air blowing pipe; 32. Metal hose; 33. External air pipe; 34. Switch valve; 341. Solenoid valve; 342. Ball valve; 35. Flip cover; 36. Sealing ring; 37. First guide ring; 371. First inclined plane; 38. Second guide ring; 381. Second inclined plane; 39. Compression spring. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 This application is described in further detail.

[0038] Example 1 of the present application discloses a coal feeder inlet plug door channel purge device.

[0039] Reference Figure 1 and Figure 2 The coal feeder inlet plug-in door channel purge device comprises a coal feeder body 1, a plug-in door 2, a transverse channel 12 and a purge mechanism.

[0040] The coal feeder body 1 has a vertical channel 11. A transverse channel 12 is installed on one side of the coal feeder body 1. The transverse channel 12 is connected to the middle of the vertical channel 11. The transverse channel 12 has a slope. A cover plate 13 is installed at the end of the transverse channel 12.

[0041] The plug-in door 2 is horizontally slidably arranged in the coal feeder body 1. The plug-in door 2 can slide horizontally to the middle of the vertical channel 11 or slide horizontally into the transverse channel 12. When the plug-in door 2 slides horizontally to the middle of the vertical channel 11, the plug-in door 2 closes the vertical channel 11, so that the coal in the vertical channel 11 cannot continue to fall. When the plug-in door 2 slides horizontally into the transverse channel 12, the plug-in door 2 opens the vertical channel 11, so that the coal in the vertical channel 11 can continue to fall.

[0042] like Figure 3 As shown, the blowing mechanism includes an air blowing pipe 31 and a compressed air delivery assembly. The air blowing pipe 31 is arranged on the cover plate 13. In this embodiment, the air blowing pipe 31 is welded and fixedly connected to the cover plate 13. One end of the air blowing pipe 31 is located in the transverse channel 12, and one end of the air blowing pipe 31 is facing the sliding direction of the plug-in door 2. The compressed air delivery assembly is used to deliver compressed air to the air blowing pipe 31.

[0043] like Figure 1As shown, the compressed air delivery assembly includes a metal hose 32 and an external air pipe 33. One end of the metal hose 32 is connected to the end of the blowing pipe 31 exposed to the transverse channel 12, and the other end of the metal hose 32 is connected to the external air pipe 33. The external air pipe 33 is located above the transverse channel 12. The external air pipe 33 can be connected to the air compressor. The external air pipe 33 can also be connected from the compressed air main pipe of the coal feeder platform plant to further reduce costs.

[0044] When clearing is required, the compressed air delivery component injects compressed air into the blowing pipe 31, and the blowing pipe 31 blows the compressed air to one side of the plug-in door 2 to clear the accumulated coal in the area between one side of the plug-in door 2 and the transverse channel 12, so that it slides downward along the transverse channel 12 into the vertical channel 11, thereby reducing the blockage and solving the problem that the accumulated coal at the end of the plug-in door 2 cannot be cleared externally, requiring shutdown and manual cleaning. The work efficiency is greatly improved, manpower is liberated, and the operation risk is reduced.

[0045] In addition, in order to realize the manual and automatic control combination and improve the clearing effect, the external air pipe 33 is also provided with a switch valve 34, which includes a solenoid valve 341 and a ball valve 342. The ball valve 342 and the solenoid valve 341 are arranged in parallel. By setting the solenoid valve 341, it can respond in time according to the preset conditions to realize automatic purging. In this embodiment, the preset condition can be that the solenoid valve 341 is opened when the plug door 2 is opened, and the purging is stopped when the plug door 2 is closed to realize automatic purging. In other embodiments, the preset condition can be that the purging is scheduled every day, and the purging duration can be set.

[0046] And, in order to increase the purge range, e.g. Figure 4 As shown, there are two air blowing pipes 31, which are respectively located at 1 / 3 and 2 / 3 of the length direction of the cover plate 13. The air blowing pipe 31 can be a DN25 pipe made of stainless steel.

[0047] In addition, in order to ensure the purging effect, the pressure of compressed air is also limited. The total compressed air pressure of the blowing pipe 31 is greater than f, f=μ*ρ*V*g, where μ is the friction coefficient of coal on the steel plate, ρ is the apparent density of coal, V is the inner cavity volume of the transverse channel 12, and g is the acceleration of gravity. Example

[0048] The difference between Example 2 and Example 1 is that Figure 5 As shown, a port of the blowing pipe 31 located in the transverse channel 12 is provided with a flap 35, the surface area of ​​one side of the flap 35 is greater than or equal to the cross-sectional area of ​​the port of the blowing pipe 31, and the upper part of the flap 35 is hingedly connected to the port of the blowing pipe 31.

[0049] When there is no blowing, the flap 35 is in a vertical state under the action of gravity and blocks the port of the blowing pipe 31, that is, the flap 35 closes the port of the blowing pipe 31 to reduce the probability of coal being pushed into the blowing pipe 31 and causing blockage when the gate 2 moves. During blowing, the compressed air blown out of the blowing pipe 31 forces the flap 35 to deflect upward to open the port of the blowing pipe 31, so that the compressed air can act on the accumulated coal. Example

[0050] The difference between Example 3 and Example 2 is that Figure 6 As shown, a through hole 131 is penetrated through the cover plate 13, and the through hole 131 is larger than the outer diameter of the blowing pipe 31. The blowing pipe 31 is connected to the through hole 131, and a sealing ring 36 is fixed on the outer circumference of the blowing pipe 31. The fixing method can be in the form of bonding, and the outer circumference of the sealing ring 36 fits the inner circumference of the through hole 131 to ensure the sealing effect.

[0051] When the coal accumulation blockage position is far away from the blowing pipe 31 and the compressed air is difficult to blow the coal accumulation away, the blowing pipe 31 can be pushed to move toward the gate 2 so that the sealing ring 36 is separated from the through hole 131 and the blowing pipe 31 is in a free moving state. Then, the movement and collision of the blowing pipe 31 can be used to clear or break the coal accumulation to destroy the overall stability of the coal accumulation. Then, the compressed air can be used to sweep away the unstable coal accumulation, thereby improving the clearing effect. Example

[0052] The difference between Example 4 and Example 3 is that Figure 7 As shown, the sealing ring 36 is cancelled, and a first guide ring 37 is fixedly mounted on the outer circumference of the blowing tube 31, and a second guide ring 38 is coaxially fixedly mounted on the inner circumference of the through hole 131. Both the first guide ring 37 and the second guide ring 38 are made of stainless steel. The outer diameter of the first guide ring 37 is larger than the inner diameter of the second guide ring 38, and the inner diameter of the second guide ring 38 is larger than the outer diameter of the blowing tube 31.

[0053] The end surface of the first guide ring 37 facing away from the vertical channel 11 is provided with a first inclined surface 371 , and the end surface of the second guide ring 38 facing the vertical channel 11 is provided with a second inclined surface 381 .

[0054] A compression spring 39 is detachably provided between the outer circumference of the air blowing pipe 31 and the cover plate 13. The specific detachable connection method is that the two ends of the compression spring 39 are respectively connected to the cover plate 13 and the outer circumference of the air blowing pipe 31 in the form of hooks, and the elastic force of the compression spring 39 will force the air blowing pipe 31 to move outward, so that the second inclined surface 381 and the first inclined surface 371 are tightly fitted together to form a relatively stable metal seal.

[0055] When the coal accumulation blockage position is far away from the blowing pipe 31 and the compressed air is difficult to blow the coal accumulation away, the hook connection of the compression spring 39 can be released to make the blowing pipe 31 free, and the blowing pipe 31 can be pushed toward the plug-in door 2. The movement and collision of the blowing pipe 31 can be used to clear or break holes in the coal accumulation to destroy the overall stability of the coal accumulation. This is more convenient and quick, and also improves the sealing stability.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coal feeder inlet gate channel purge device, characterized in that: The invention comprises a coal feeder body (1), a plug-in door (2), a transverse channel (12) and a purging mechanism, wherein the coal feeder body (1) has a vertical channel (11), the transverse channel (12) is installed on one side of the coal feeder body (1), the transverse channel (12) is connected to the middle of the vertical channel (11), the plug-in door (2) is horizontally slidably arranged in the coal feeder body (1), the plug-in door (2) can be horizontally slid to the middle of the vertical channel (11) or horizontally slid into the transverse channel (12); a cover plate (13) is provided at the end of the transverse channel (12); the purging mechanism comprises an air blowing pipe (31) and a compressed air delivery assembly, the air blowing pipe (31) is arranged on the cover plate (13), one end of the air blowing pipe (31) is located in the transverse channel (12), one end of the air blowing pipe (31) faces the sliding direction of the plug-in door (2), and the compressed air delivery assembly is used to deliver compressed air into the air blowing pipe (31).

2. The coal feeder inlet gate channel purge device according to claim 1, characterized in that: The number of the air blowing pipes (31) is two, and the two air blowing pipes (31) are respectively located at 1 / 3 and 2 / 3 of the length direction of the cover plate (13).

3. The coal feeder inlet gate channel purge device according to claim 1 or 2, characterized in that: The compressed air delivery assembly comprises a metal hose (32) and an external air pipe (33), wherein the external air pipe (33) is located above the transverse channel (12), one end of the metal hose (32) is connected to the end of the air blowing pipe (31) exposed to the transverse channel (12), and the other end of the metal hose (32) is connected to the external air pipe (33), and the external air pipe (33) is provided with a switch valve (34), and the switch valve (34) comprises a solenoid valve (341).

4. The coal feeder inlet gate channel purge device according to claim 3, characterized in that: The switch valve (34) further comprises a ball valve (342), and the ball valve (342) is arranged in parallel with the solenoid valve (341).

5. The coal feeder inlet gate channel purge device according to claim 1 or 2, characterized in that: The total compressed air pressure of the blowing pipe (31) is greater than f, f=μ*ρ*V*g, where μ is the friction coefficient of coal on the steel plate, ρ is the apparent density of coal, V is the inner cavity volume of the transverse channel (12), and g is the acceleration of gravity.

6. The coal feeder inlet gate channel purge device according to claim 1 or 2, characterized in that: A flap (35) is provided at a port of the air blowing pipe (31) located in the transverse channel (12); the surface area of ​​one side of the flap (35) is greater than or equal to the cross-sectional area of ​​the port of the air blowing pipe (31); the upper part of the flap (35) is hingedly connected to the port of the air blowing pipe (31); the flap (35) is in a vertical state under the action of gravity and blocks the port of the air blowing pipe (31); and the compressed air blown out of the air blowing pipe (31) forces the flap (35) to deflect upward.

7. The coal feeder inlet gate channel purge device according to claim 6, characterized in that: The cover plate (13) is provided with a through hole (131) which is larger than the outer diameter of the air blowing pipe (31). The air blowing pipe (31) is connected to the through hole (131) through a through hole. A sealing ring (36) is fixedly sleeved on the outer circumference of the air blowing pipe (31). The outer circumference of the sealing ring (36) fits the inner circumference of the through hole (131).

8. The coal feeder inlet gate channel purge device according to claim 6, characterized in that: The cover plate (13) is provided with a through hole (131), the through hole (131) is larger than the outer diameter of the air blowing pipe (31), and the air blowing pipe (31) is connected to the through hole (131); a first guide ring (37) is fixedly sleeved on the outer circumference of the air blowing pipe (31), and a second guide ring (38) is coaxially fixed on the inner circumference of the through hole (131); both the first guide ring (37) and the second guide ring (38) are made of stainless steel, the outer diameter of the first guide ring (37) is larger than the inner diameter of the second guide ring (38), and the second guide ring (38) is coaxially fixed to the inner circumference of the through hole (131). The inner diameter of the guide ring (38) is larger than the outer diameter of the air blowing pipe (31); the end surface of the first guide ring (37) facing away from the vertical channel (11) is provided with a first inclined surface (371); the end surface of the second guide ring (38) facing the vertical channel (11) is provided with a second inclined surface (381); the second inclined surface (381) is in contact with the first inclined surface (371); a compression spring (39) is detachably provided between the outer peripheral surface of the air blowing pipe (31) and the cover plate (13); the compression spring (39) is used to force the air blowing pipe (31) to move outward.

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