Rotary ash valve

Abstract

The application discloses a rotary dust discharging valve, which comprises a valve body, a flow guide device, a driving device and a stock bin, wherein the valve body is connected with the flow guide device, the flow guide device is connected with the driving device, the driving device is connected with the valve body, the stock bin is tightly connected with the valve body, the valve body is provided with an ash inlet, the ash inlet is communicated with an ash outlet of the stock bin, the ash inlet is vertically arranged on the upper layer of the valve body, the lower layer of the valve body is provided with a dust outlet, the valve body is provided with a dust discharging cavity, the ash inlet is communicated with the dust outlet through the dust discharging cavity, the driving device is a main power source, the driving device controls the rotation of the pulverized coal in the dust discharging cavity, and the automatic feeding is realized, the pulverized coal is fed into the dust discharging cavity through the ash inlet under the action of the gravity, and the power feeding is realized, the gas is guided through the flow guide device, the power is applied to the pulverized coal, the pulverized coal moves in the dust discharging cavity, the pulverized coal is prevented from being pressed and caked in the transfer process, the local blockage is prevented, and even the pulverized coal is prevented from being damaged and the sealing surface is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotary dust discharging valve, in particular to a rotary dust discharging valve. BACKGROUND

[0002] The rotary dust discharging valve is also called a feeder, which is used for continuous batching and conveying in a mechanized and automatic control system, and is widely used in metallurgy, chemical industry and power industry, and is a commonly used equipment for conveying coal powder, cement and other materials. However, most of the rotary dust discharging valves are only used for material supply simply, and the supply accuracy is poor.

[0003] When the coal powder falls into the rotary dust discharging valve under the action of gravity, the coal powder is rough and has large friction, causing large rotary resistance. During the rotation, the coal powder is subjected to one-way stress and adheres to the surface of the rotating paddle in front of the rotation direction, which easily causes coal powder caking, affects the flowability of the coal powder, and causes local blockage, resulting in uneven combustion in the later combustion process and affecting the quality of coal powder supply.

[0004] In addition, during the coal powder supply process, the coal powder itself has large hardness, and some hard impurities may be mixed in the coal powder, especially during the rotary feeding, the centrifugal force is applied to the coal powder, the large particles in the coal powder have large gravity, and are easy to move to the sealing surface, causing the impeller to be stuck, and affecting the service life. SUMMARY

[0005] The present application aims to provide a rotary dust discharging valve to solve the problems in the background art.

[0006] In order to solve the above technical problems, the present application provides the following technical scheme:

[0007] A rotary dust discharging valve, the rotary dust discharging valve comprises a valve body, a flow guide device, a driving device and a bunker, the valve body and the flow guide device are connected, the flow guide device and the driving device are connected, the driving device and the valve body are connected, the bunker and the valve body are tightly connected, the valve body is provided with a dust inlet, the dust outlet of the bunker and the dust inlet are communicated, the dust inlet is located on the upper layer of the valve body, the dust inlet is vertically arranged, the lower layer of the valve body is provided with a dust outlet, the valve body is provided with a dust discharging cavity, and the dust inlet is communicated with the dust outlet through the dust discharging cavity.

[0008] The material is carried in the bin, enters the unloading chamber of the valve body through the ash inlet, the valve body transports the material through the unloading chamber, and the material is discharged through the ash outlet. For example, when pulverized coal is fed, the material is pulverized coal, the driving device is the main power source, the pulverized coal is controlled to rotate in the unloading chamber, automatic feeding is performed, the ash inlet is arranged on the top, the pulverized coal enters the unloading chamber through the ash inlet under the action of gravity, power-free feeding is performed, the gas flow guide device guides the gas flow, and the pulverized coal is powered to move in the unloading chamber, preventing the pulverized coal from being pressed and caked during the transportation process, causing local blockage, even damage, and damage to the sealing surface.

[0009] Further, the driving device includes a motor and an impeller, the motor housing is tightly connected with the valve body, the impeller is arranged in the unloading chamber, the motor and the impeller are in transmission connection, the valve body is provided with a rotary cavity, the motor output end is inserted into the rotary cavity, the impeller includes a rotating shaft, the rotary cavity and the unloading chamber are in communication, the rotating shaft is arranged in the rotary cavity, the motor output end and the impeller are in transmission connection, one end of the rotating shaft penetrates through the rotary cavity and is inserted into the unloading chamber, and a plurality of paddles are arranged on the end of the rotating shaft away from the motor in a circumferential direction, and the ends of the plurality of paddles away from the rotating shaft are in sliding connection with the wall surface of the unloading chamber.

[0010] The flow guide device includes a high-pressure air pipe, the rotary cavity is provided with a step, the rotating shaft is provided with an air inlet, the air inlet inlet is located in the large-diameter area of the rotary cavity, the paddle is provided with a guide plate on one side, the guide plate is arranged along the rotating direction of the paddle, the guide plate is an elastic plate, the angle area between the paddle and the guide plate forms a booster chamber, the paddle is provided with a flow guide channel, the air inlet and the flow guide channel are in communication, the end of the flow guide channel faces the booster chamber, the paddle is provided with a shunt channel, the shunt channel inlet is in communication with the booster chamber, a plurality of discharge ports are arranged on one side of the shunt channel along the rotating direction of the paddle, and the diameters of the plurality of discharge ports gradually increase along the direction of the center of the rotating shaft.

[0011] The motor is fixed by the valve body, the motor drives the impeller to rotate in the ash discharging cavity, the upper layer of coal powder is transported to the lower layer, the feeding is carried out, the rotating shaft is supported by the rotating cavity, the paddle rotates in the ash discharging cavity, the outer side of the paddle and the ash discharging cavity slide, the high-pressure air pipe supplies air, the rotating cavity is provided with steps, the minimum diameter is matched with the rotating shaft, the diameter of the large-diameter area is larger than the diameter of the rotating shaft, the high-pressure gas guided by the high-pressure air pipe enters the large-diameter area of the rotating cavity, the large-diameter area is communicated with the air inlet channel, the high-pressure gas enters the guide channel of the paddle through the air inlet channel, the paddle and the guide plate arranged thereon form a pressurized area, the guide plate is inclinedly arranged, the end far away from the paddle is closer to the wall surface of the ash discharging cavity, the output speed of the motor is adjusted, the coal powder in the transport cavity is in an unfilled state, for example, the coal powder occupies half of the space, the coal powder is centrifuged under the action of the impeller, under the action of the centrifugal force, the large-particle coal powder has large weight and receives large centrifugal force, and flows to the boundary of the paddle and the ash discharging cavity, when the large-particle coal powder enters the space between the guide plate and the wall surface of the ash discharging cavity, the guide plate is made of elastic material and is contracted to the axis of the rotating shaft, the guide plate is inclinedly arranged, the longitudinal section of the pressurized cavity away from the rotating direction of the paddle is gradually increased, so that the large-particle coal powder is contained, the large-particle coal powder cannot press the surface of the ash discharging cavity under the action of the clamping force, and the surface is damaged, the large-particle coal powder falls into the inlet of the shunt channel under the action of the weight, the pressurized cavity cannot be communicated with the shunt channel, the gas in the guide channel is continuously supplied, the gas pressure in the pressurized cavity is increased, the large-particle coal powder is pressed into the shunt channel under the action of the pressure, the shunt channel is provided with a plurality of discharge ports arranged along the radial direction, the discharge ports are close to the axis of the paddle, and the diameter of the discharge ports is the largest, when the coal powder particles are sprayed out of the discharge ports, the large-particle coal powder is located in the inner layer of the paddle, and the small-particle coal powder is located in the outer layer of the paddle, the different particle sizes of the coal powder are rearranged, the paddle is prevented from being clamped by the large-particle coal powder, and the service life is affected, the outlet of the discharge port faces the coal powder layer, the coal powder is impacted by the high-pressure airflow, the coal powder is in a loose state, and the coal powder is prevented from being clumped under the action of the unidirectional force and clamped.

[0012] Further, the guide plate is inclinedly arranged, and the end of the guide plate far away from the paddle faces the wall surface of the ash discharging cavity. The guide plate is inclinedly arranged, the longitudinal section of the pressurized cavity away from the rotating direction of the paddle is gradually increased, so that the large-particle coal powder is contained, the large-particle coal powder cannot press the surface of the ash discharging cavity under the action of the clamping force, and the surface is damaged.

[0013] Further, the transport cavities are arranged between the adjacent paddles, and the pressurized cavities are communicated with the transport cavities. The ash discharging cavity is divided into a plurality of transport spaces by the transport cavities, so that the continuous transportation is facilitated, and the transportation efficiency is improved.

[0014] Further, a plurality of pads are arranged along the wall surface of the shunt channel, the end of the pad faces the discharge port, the number of the pads is matched with the number of the discharge ports, the length of the pad gradually decreases along the direction of the axis of the rotating shaft, and the pad is an elastic plate.

[0015] The pad plate is installed on the shunt passage wall and faces the discharge port. When the coal particles hit the pad plate, if the coal particles are smaller than the current discharge port diameter, the coal particles will automatically change direction under the action of the pad plate, enter the transfer cavity through the current discharge port, and if the coal particles are larger than the current discharge port diameter, the coal particles will be pushed to continue moving to the inner layer of the paddle under the action of the pressure difference, and the pad plate will deform, and the large coal particles will enter the next discharge port side.

[0016] Further, the flow guide device further comprises a bypass plate, the paddle is provided with a backflow port, the backflow port is arranged in a direction away from the rotation direction of the paddle, the backflow port inlet is communicated with the plenum, the bypass plate is rotationally connected with the backflow port outlet, the bypass plate is provided with a volute spring at both ends, the volute spring is fixedly connected with the backflow port at the end, and adjacent transfer cavities are intermittently communicated through the backflow port.

[0017] When backflowing: the adjacent two transfer cavities are sequentially communicated through the plenum and the backflow port.

[0018] The bypass plate arranged at the backflow port outlet controls the on-off of the backflow port and the transfer cavity in the direction away from the direction, which is convenient for uniformly distributing the coal powder in the transfer cavities, so that the amount of coal powder in each transfer cavity is equivalent, the feeding is more uniform, which helps to ensure the uniformity of combustion and prevent combustion fluctuation. When the amount of coal powder in the front transfer cavity is too much, the density is large, and the friction with the ash discharge cavity wall is large during centrifugation. The gas in the flow guide passage entering the plenum reduces the gas leakage amount per unit time between the guide plate and the ash discharge cavity wall, so that the instantaneous pressure in the plenum increases. Under the action of high pressure in the plenum, the distal end of the guide plate rotates to the inner layer, the coal powder in the front transfer cavity enters the plenum, and under the action of high pressure, the bypass plate rotates to make the rear transfer cavity and the backflow port communicate, so that the coal powder in the front transfer cavity sequentially passes through the plenum and the backflow port and enters the rear transfer cavity, so that the feeding is more uniform.

[0019] As an optimization, the discharge port is obliquely arranged, and the outlet end of the discharge port faces the inner layer of the transfer cavity. By obliquely arranging the discharge port, the coal particles impact the coal powder in the transfer cavity, preventing clumping, and tilting towards the inner layer facilitates the movement of large coal particles to the inner layer, preventing re-entry into the gap between the paddle and the ash discharge cavity.

[0020] As an optimization, the thickness of the guide plate gradually decreases along the rotation direction of the shaft. By gradually changing the thickness of the guide plate, it is convenient to install the guide plate, the thickness of the end is thinner, which is easier to deform, and the force applied to the coal particles is not large, which is not easy to damage the inner wall of the ash discharge cavity when clamping.

[0021] As an optimization, the ash outlet is horizontally arranged, and the ash outlet ash direction is along the tangent direction of the ash discharge cavity. By horizontally arranging the ash outlet, the ash is discharged horizontally, so that the coal powder flows out in the tangent direction of the ash discharge cavity, ensuring the quality of the discharged material.

[0022] Compared with the prior art, the present application has the advantages that: under the action of centrifugal force, the large-particle coal powder is subjected to a large centrifugal force, and flows to the boundary of the paddle and the ash discharging chamber; since the guide plate is made of elastic material, the longitudinal section of the plenum chamber away from the rotation direction of the paddle is getting larger and larger, thereby containing the large-particle coal powder, so that the large-particle coal powder cannot press the surface of the ash discharging chamber under the action of the clamping force, and the surface is not damaged; the gas is continuously supplied in the flow guide channel, so that the gas pressure in the plenum chamber is increased, and the large-particle coal powder is pressed into the distribution channel under the action of the pressure; the distribution channel is provided with a plurality of discharge ports arranged in the radial direction, and the diameter of the discharge port near the rotation axis of the paddle is the largest; when the coal powder particles are ejected from the discharge port, the large-particle coal powder is located in the inner layer of the paddle, and the small-particle coal powder is located in the outer layer of the paddle; by rearranging the coal powder particles of different particle sizes, the large-particle coal powder is prevented from clamping the paddle, and the service life is affected; the outlet of the discharge port faces the coal powder layer, and the coal powder is impacted by the high-pressure gas flow, so that the coal powder is in a loose state, and the coal powder is prevented from being clumped under the action of unidirectional force, and clamped; when the coal powder particles impact on the pad, if the coal powder particle is smaller than the diameter of the current discharge port, the coal powder particle is automatically reversed under the action of the pad, and the coal powder particle enters the transfer chamber through the current discharge port; if the coal powder particle is larger than the diameter of the current discharge port, the coal powder particle is pushed to move to the inner layer of the paddle under the action of the pressure difference, and the pad is deformed, and the large-particle coal powder enters the side of the next discharge port; the bypass plate arranged at the outlet of the backflow port controls the opening and closing of the backflow port and the transfer chamber away from the direction, so that the transfer chamber is uniformly distributed, the amount of coal powder in each transfer chamber is equivalent, the feeding is more uniform, the combustion uniformity is ensured, and combustion fluctuation is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the present application;

[0025] Figure 2 is a schematic diagram of the rotation power transmission of the present application;

[0026] Figure 3 is Figure 2 is a sectional view of the H-H view;

[0027] Figure 4 is a schematic diagram of the gas flow path of the present application;

[0028] Figure 5 is Figure 3 is a partial A enlarged view of the view;

[0029] Figure 6 is a schematic diagram of the rotation direction of the paddle of the present application;

[0030] In the diagram: 1-valve body, 11-ash inlet, 12-ash outlet, 13-ash discharge chamber, 14-rotating chamber, 2-flow guiding device, 21-high pressure air duct, 22-bypass plate, 23-volute spring, 3-drive device, 31-motor, 32-impeller, 321-shaft, 3211-air inlet, 322-blade, 3221-flow guiding channel, 3222-diverting channel, 3223-discharge port, 3224-return port, 33-guide plate, 34-pad plate, 4-hopper. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The present invention provides the following technical solution:

[0033] like Figures 1-3 As shown, a rotary ash discharge valve includes a valve body 1, a flow guiding device 2, a drive device 3, and a hopper 4. The valve body 1 is connected to the flow guiding device 2, the flow guiding device 2 is connected to the drive device 3, the drive device 3 is connected to the valve body 1, and the hopper 4 is fastened to the valve body 1. The valve body 1 is provided with an ash inlet 11, and the outlet of the hopper 4 is connected to the ash inlet 11. The ash inlet 11 is located on the upper layer of the valve body 1 and is arranged vertically. The lower layer of the valve body 1 is provided with an ash outlet 12, and the valve body 1 is provided with an ash discharge chamber 13. The ash inlet 11 is connected to the ash outlet 12 through the ash discharge chamber 13.

[0034] The hopper 4 contains material, which enters the ash discharge chamber 13 of the valve body 1 through the ash inlet 11. The valve body 1 transfers the material through the ash discharge chamber 13 and discharges the material through the ash outlet 12. For example, when feeding pulverized coal, the material is pulverized coal. The drive device 3 is the main power source, which controls the pulverized coal to rotate in the ash discharge chamber 13 for automatic feeding. The ash inlet 11 is set at the top, so that the pulverized coal enters the ash discharge chamber 13 under its own weight for non-powered feeding. The gas is guided by the flow guide device 2 and power is applied to the pulverized coal to make it move in the ash discharge chamber 13, preventing the pulverized coal from being compressed and agglomerated during the transfer process, causing local blockage or even damage, and destroying the sealing surface.

[0035] like Figures 2-5As shown, the driving device 3 comprises a motor 31 and an impeller 32, the motor 31 is fixedly connected with the valve body 1, the impeller 32 is arranged in the ash discharging cavity 13, the motor 31 and the impeller 32 are in transmission connection, the valve body 1 is provided with a rotating cavity 14, the output end of the motor 31 is inserted into the rotating cavity 14, the impeller 32 comprises a rotating shaft 321, the rotating cavity 14 and the ash discharging cavity 13 are communicated, the rotating shaft 321 is arranged in the rotating cavity 14, the output end of the motor 31 and the impeller 32 are in transmission connection, one end of the rotating shaft 321 penetrates through the rotating cavity 14 and is inserted into the ash discharging cavity 13, a plurality of paddles 322 are arranged on the end of the rotating shaft 321 away from the motor 31 in the circumferential direction, and the end of the plurality of paddles 322 away from the rotating shaft 321 is in sliding connection with the wall surface of the ash discharging cavity 13.

[0036] The flow guide device 2 comprises a high-pressure air pipe 21, the rotating cavity 14 is provided with a step, the rotating shaft 321 is provided with an air inlet 3211, the inlet of the air inlet 3211 is located in the large-diameter area of the rotating cavity 14, one side of the paddle 322 is provided with a guide plate 33, the guide plate 33 is arranged along the rotating direction of the paddle 322, the guide plate 33 is an elastic plate, the angle area between the paddle 322 and the guide plate 33 forms a booster cavity, the paddle 322 is provided with a flow guide channel 3221, the air inlet 3211 and the flow guide channel 3221 are communicated, the end of the flow guide channel 3221 faces the booster cavity, the paddle 322 is provided with a shunt channel 3222, the inlet of the shunt channel 3222 is communicated with the booster cavity, a plurality of discharge ports 3223 are arranged on one side of the shunt channel 3222 along the rotating direction of the paddle 322, and the diameters of the plurality of discharge ports 3223 gradually increase along the direction of the center of the rotating shaft 321.

[0037] The motor 31 is fixed by the valve body 1, the motor 31 drives the impeller 32 to rotate in the ash discharging cavity 13, the upper layer of coal powder is transported to the lower layer, the feeding is carried out, the rotating shaft 321 is supported by the rotating cavity 14, the paddle 322 rotates in the ash discharging cavity 13, the outer side of the paddle 322 and the ash discharging cavity 13 slide, the high-pressure air pipe 21 supplies air, the rotating cavity 14 is provided with a step, the minimum diameter is matched with the rotating shaft 321, the diameter of the large-diameter area is larger than the diameter of the rotating shaft 321, the high-pressure gas guided by the high-pressure air pipe 21 enters the large-diameter area of the rotating cavity 14, the large-diameter area is communicated with the air inlet 3211, the high-pressure gas enters the guide channel 3221 of the paddle 322 through the air inlet 3211, the paddle 322 and the guide plate 33 arranged thereon form a pressurized area, the guide plate 33 is arranged obliquely, the end of the guide plate 33 away from the paddle 322 is closer to the wall surface of the ash discharging cavity 13, the output rotating speed of the motor 31 is adjusted, the coal powder in the conveying cavity is in an unfilled state, for example, the coal powder occupies half of the space, the coal powder is centrifuged under the action of the impeller 32, under the action of the centrifugal force, the large-particle coal powder has a large weight and receives a large centrifugal force, and flows to the boundary between the paddle 322 and the ash discharging cavity 13, when the large-particle coal powder enters the space between the guide plate 33 and the wall surface of the ash discharging cavity 13, the guide plate 33 is made of elastic material and is contracted to the axis of the rotating shaft 321, the guide plate 33 is arranged obliquely, the longitudinal section of the pressurized cavity away from the rotating direction of the paddle 322 is larger and larger, thereby accommodating the large-particle coal powder, so that the large-particle coal powder does not press the surface of the ash discharging cavity 13 under the action of the clamping force, and the surface is not damaged, the large-particle coal powder falls into the inlet of the shunt channel 3222 under the action of the weight, the pressurized cavity cannot be communicated with the shunt channel 3222, the gas in the pressurized cavity is continuously supplied through the guide channel 3221, the gas pressure in the pressurized cavity is increased, the large-particle coal powder is pressed into the shunt channel 3222 under the action of the pressure, the shunt channel 3222 is arranged in the radial direction, the unloading port 3223 is arranged near the rotating axis of the paddle 322, the diameter of the unloading port 3223 is the largest, when the coal powder particles are sprayed from the unloading port 3223, the large-particle coal powder is located in the inner layer of the paddle 322, and the small-particle coal powder is located in the outer layer of the paddle 322, the different particle sizes of the coal powder are rearranged, the large-particle coal powder is prevented from clamping the paddle 322, and the service life is affected, the outlet of the unloading port 3223 faces the coal powder layer, the coal powder is impacted by the high-pressure airflow, the coal powder is in a loose state, the coal powder is prevented from being clumped under the action of the unidirectional force, and the clamping is prevented.

[0038] As shown in Figure 5 the guide plate 33 is arranged obliquely, and the end of the guide plate 33 away from the paddle 322 faces the wall surface of the ash discharging cavity 13. The guide plate 33 is arranged obliquely, the longitudinal section of the pressurized cavity away from the rotating direction of the paddle 322 is larger and larger, thereby accommodating the large-particle coal powder, so that the large-particle coal powder does not press the surface of the ash discharging cavity 13 under the action of the clamping force, and the surface is not damaged.

[0039] AsFigure 6 As shown, the adjacent paddle 322 is provided with a transfer cavity, the booster cavity and the transfer cavity are communicated. The ash discharge cavity 13 is divided into several transfer spaces by the transfer cavity, which is convenient for continuous transfer and improves the transfer efficiency.

[0040] As shown, Figure 5 As shown, a plurality of pads 34 are arranged along the wall surface of the shunt 3222, the end of the pad 34 is directed to the discharge port 3223, the number of the pad 34 is matched with the number of the discharge port 3223, the length of the pad 34 gradually decreases along the direction of the shaft 321 axis, and the pad 34 is an elastic plate.

[0041] The pad 34 is installed on the wall surface of the shunt 3222 and is directed to the discharge port 3223. When the pulverized coal particles impact on the pad 34, if the diameter of the pulverized coal particles is smaller than that of the current discharge port 3223, the pulverized coal particles are automatically reversed under the action of the pad 34, and the pulverized coal particles enter the transfer cavity through the current discharge port 3223. If the diameter of the pulverized coal particles is larger than that of the current discharge port 3223, the pulverized coal particles are pushed to move to the inner layer of the paddle 322 under the action of the pressure difference, and the pad 34 is deformed, and the large particle coal powder enters the next discharge port 3223.

[0042] As shown, Figure 6 As shown, the guide device 2 further comprises a bypass plate 22, the paddle 322 is provided with a backflow port 3224, the backflow port 3224 is arranged in a direction away from the rotation direction of the paddle 322, the inlet of the backflow port 3224 is communicated with the booster cavity, the bypass plate 22 is rotationally connected with the outlet of the backflow port 3224, the bypass plate 22 is provided with a volute spring 23 at both ends, the end of the volute spring 23 is fixedly connected with the backflow port 3224, and the adjacent transfer cavities are intermittently communicated through the backflow port 3224.

[0043] When backflowing: the adjacent two transfer cavities are sequentially communicated through the booster cavity and the backflow port 3224.

[0044] The bypass plate 22 arranged at the outlet of the backflow port 3224 controls the on-off of the backflow port 3224 and the transfer cavity in the direction away from the backflow port 3224, which is convenient for uniformly distributing the coal powder in the transfer cavity, so that the amount of the coal powder in each transfer cavity is equivalent, the feeding is more uniform, which is helpful to ensure the uniformity of combustion and prevent combustion fluctuation. When the amount of the coal powder in the front transfer cavity is too much, the density is large, and the friction between the coal powder and the wall surface of the ash discharge cavity 13 is large in the centrifugal process. The gas entering the booster cavity from the guide plate 33 and the wall surface of the ash discharge cavity 13 reduces the gas leakage amount per unit time, so that the instantaneous pressure in the booster cavity increases. Under the action of the high pressure in the booster cavity, the distal end of the guide plate 33 rotates to the inner layer, the coal powder in the front transfer cavity enters the booster cavity, and under the action of the high pressure, the bypass plate 22 is driven to rotate, so that the rear transfer cavity is communicated with the backflow port 3224. Thus, the coal powder in the front transfer cavity sequentially passes through the booster cavity and the backflow port 3224 and enters the rear transfer cavity, so that the feeding is more uniform.

[0045] As an optimization, the discharge port 3223 is arranged obliquely, and the outlet end of the discharge port 3223 is directed toward the inner layer of the transfer cavity. By arranging the discharge port 3223 obliquely, the coal powder particles impact the coal powder in the transfer cavity, preventing caking, and the oblique direction is toward the inner layer, facilitating the movement of large coal powder particles to the inner layer and preventing re-entry between the paddle 322 and the ash discharge cavity 13 to cause jamming.

[0046] As an optimization, the guide plate 33 gradually decreases in thickness along the rotation direction of the rotating shaft 321. By gradually changing the thickness of the guide plate 33, it is convenient to install the guide plate 33, the end is thinner and more easily deformed, and the force applied to the coal powder particles is not large, which is not easy to damage the inner wall of the ash discharge cavity 13 when jamming.

[0047] As an optimization, the ash outlet 12 is arranged horizontally, and the ash discharge direction of the ash outlet 12 is along the tangent direction of the ash discharge cavity 13. By arranging the ash outlet 12 horizontally, horizontal ash discharge is performed, the coal powder flows out in the tangent direction of the ash discharge cavity 13, and the quality of the discharge is ensured.

[0048] The working principle of the present application is as follows: under the action of centrifugal force, the large-particle coal powder is subjected to a large centrifugal force and flows to the boundary of the paddle 322 and the ash discharging cavity 13; when the large-particle coal powder enters the space between the guide plate 33 and the wall surface of the ash discharging cavity 13, the guide plate 33 shrinks towards the axis of the rotating shaft 321 due to the fact that the guide plate 33 is made of elastic material; the guide plate 33 is arranged obliquely, and the longitudinal section of the plenum chamber away from the rotating direction of the paddle 322 becomes larger and larger, so that the large-particle coal powder is contained, and the large-particle coal powder cannot press the surface of the ash discharging cavity 13 under the action of the clamping force, thereby preventing the surface from being damaged; the gas in the flow guide passage 3221 is continuously supplied, so that the gas pressure in the plenum chamber is increased, and the large-particle coal powder is pressed into the distribution passage 3222 under the action of the pressure; the distribution passage 3222 is arranged radially on the upper part of the distribution passage 3222, and the diameter of the discharge port 3223 near the rotating axis of the paddle 322 is the largest; when the coal powder particles are ejected from the discharge port 3223, the large-particle coal powder is located in the inner layer of the paddle 322, and the small-particle coal powder is located in the outer layer of the paddle 322; the different particle sizes of the coal powder are rearranged, so that the large-particle coal powder cannot jam the paddle 322 and affect the service life; the outlet of the discharge port 3223 faces the coal powder layer, the coal powder is impacted by the high-pressure gas flow, so that the coal powder is in a loose state, and the coal powder is prevented from being jammed by one-way stress; when the coal powder particles impact the pad 34, if the diameter of the coal powder particles is smaller than the diameter of the current discharge port 3223, the coal powder particles are automatically reversed under the action of the pad 34, the coal powder particles enter the transfer cavity through the current discharge port 3223, and if the diameter of the coal powder particles is larger than the diameter of the current discharge port 3223, the coal powder particles are pushed to move to the inner layer of the paddle 322 under the action of the pressure difference, and the pad 34 is deformed, and the large-particle coal powder enters the side of the next discharge port 3223; when the coal powder in the front transfer cavity is too much, the density is large, and the friction between the coal powder and the wall surface of the ash discharging cavity 13 is large during the centrifugal process; the gas in the flow guide passage 3221 entering the plenum chamber is reduced in the unit time between the guide plate 33 and the wall surface of the ash discharging cavity 13, so that the instantaneous pressure in the plenum chamber is increased; under the action of the high pressure in the plenum chamber, the distal end of the guide plate 33 rotates to the inner layer, the coal powder in the front transfer cavity enters the plenum chamber, the bypass plate 22 is pushed to rotate under the action of the high pressure, the rear transfer cavity and the return port 3224 are communicated, so that the coal powder in the front transfer cavity enters the rear transfer cavity through the plenum chamber and the return port 3224 in turn.

[0049] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0050] Finally, it should be noted that the above-mentioned only constitutes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, equivalent replacements, improvements and the like of the technical solutions described in the foregoing embodiments can still be made. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary ash discharge valve, characterized in that: The rotary ash discharge valve includes a valve body (1), a flow guiding device (2), a drive device (3), and a hopper (4). The valve body (1) is connected to the flow guiding device (2), the flow guiding device (2) is connected to the drive device (3), the drive device (3) is connected to the valve body (1), and the hopper (4) is fastened to the valve body (1). The valve body (1) is provided with an ash inlet (11), and the outlet of the hopper (4) is connected to the ash inlet (11). The ash inlet (11) is located on the upper layer of the valve body (1) and is arranged vertically. The lower layer of the valve body (1) is provided with an ash outlet (12), and the valve body (1) is provided with an ash discharge chamber (13). The ash inlet (11) is connected to the ash outlet (12) through the ash discharge chamber (13). The driving device (3) includes a motor (31) and an impeller (32). The motor (31) housing and valve body (1) are fastened together. The impeller (32) is placed in the ash discharge chamber (13). The motor (31) and impeller (32) are connected by a drive. The valve body (1) is provided with a rotary chamber (14). The output end of the motor (31) is inserted into the rotary chamber (14). The impeller (32) includes a rotating shaft (321). The rotary chamber (14) and The ash discharge chamber (13) is connected, the rotating shaft (321) is placed in the rotary chamber (14), the output end of the motor (31) is connected to the impeller (32) for transmission, one end of the rotating shaft (321) passes through the rotary chamber (14) and is inserted into the ash discharge chamber (13), and a number of blades (322) are provided circumferentially at the end of the rotating shaft (321) away from the motor (31), and the ends of the blades (322) away from the rotating shaft (321) are slidably connected to the wall of the ash discharge chamber (13); The flow guiding device (2) includes a high-pressure air duct (21), the rotary cavity (14) is stepped, the rotating shaft (321) is provided with an air inlet (3211), the inlet of the air inlet (3211) is located in the large diameter area of ​​the rotary cavity (14), the blade (322) is provided with a guide plate (33) on one side, the guide plate (33) is arranged along the rotation direction of the blade (322), the guide plate (33) is an elastic plate, the angle area between the blade (322) and the guide plate (33) forms a pressurization cavity, the blade (322) 22) A guide channel (3221) is provided on the blade, the air intake (3211) and the guide channel (3221) are connected, the end of the guide channel (3221) faces the pressurization chamber, the blade (322) is provided with a diversion channel (3222), the inlet of the diversion channel (3222) is connected to the pressurization chamber, and the diversion channel (3222) is provided with a plurality of discharge ports (3223) on one side along the rotation direction of the blade (322), and the diameter of the plurality of discharge ports (3223) gradually increases along the direction towards the center of the rotating shaft (321).

2. The rotary ash discharge valve according to claim 1, characterized in that: The guide plate (33) is arranged at an angle, with the end of the guide plate (33) away from the blade (322) facing the wall of the ash discharge chamber (13).

3. A rotary ash discharge valve according to claim 2, characterized in that: A transfer chamber is provided between adjacent blades (322), and the pressurization chamber and the transfer chamber are connected.

4. A rotary ash discharge valve according to claim 3, characterized in that: A number of pads (34) are provided along the wall of the diversion channel (3222). The end of the pad (34) faces the discharge port (3223). The number of pads (34) and the number of discharge ports (3223) are matched. The length of the pad (34) gradually decreases along the axis of the rotating shaft (321). The pad (34) is an elastic plate.

5. A rotary ash discharge valve according to claim 4, characterized in that: The flow guiding device (2) also includes a bypass plate (22), and the blade (322) is provided with a return port (3224). The return port (3224) is arranged in a direction opposite to the rotation direction of the blade (322). The inlet of the return port (3224) is connected to the pressurization chamber. The bypass plate (22) and the outlet of the return port (3224) are rotatably connected. The two ends of the bypass plate (22) are provided with spiral springs (23). The end of the spiral spring (23) is fastened to the return port (3224). The adjacent transfer chambers are intermittently connected through the return port (3224). During recirculation: the two adjacent transfer chambers are connected sequentially through the pressurization chamber and the recirculation port (3224).

6. A rotary ash discharge valve according to claim 5, characterized in that: The discharge port (3223) is arranged at an angle, with the outlet end of the discharge port (3223) facing the inner layer of the transfer cavity.

7. A rotary ash discharge valve according to claim 6, characterized in that: The thickness of the guide plate (33) gradually decreases along the rotation direction of the rotating shaft (321).

8. A rotary ash discharge valve according to claim 7, characterized in that: The ash outlet (12) is arranged horizontally, and the ash outlet (12) discharges ash in the direction of the tangent of the ash discharge chamber (13).

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