A uniform density discharging device for a boiler powder feeder

Abstract

The utility model discloses a boiler powder feeder even density unloading device relates to unloading technical field, include: the tank, the bottom of tank is provided with the discharge valve, the even material subassembly is set up in the inside of tank, and the even material subassembly includes two filter screens fixed in the inside wall of tank, the scattering piece and two knockers. The utility model discloses through servo motor drive mounting rod rotation, and mounting rod drives stirring bar rotation, and when stirring bar rotates, first lug will scatter some raw material group that is easy to scatter, and when stirring bar passes through corresponding two fixed bars, first lug and second lug will break the raw material group and make it crack, and when stirring bar passes through two fixed bars, and fixed bar extrusion will push the connecting column into the installation groove and extrude the inner spring with stirring bar, and will twist the raw material group between both, and the raw material that fully twists will pass through layer filter screen and fall into tank bottom and use, avoid the obvious high low difference of local density caused by caking raw material, improve the evenness of density when unloading.

Description

Technical Field

[0001] This utility model relates to the field of material feeding technology, specifically to a uniform density feeding device for a boiler pulverizer. Background Technology

[0002] A boiler pulverizer is a device used to feed powdered fuels (such as pulverized coal, biomass powder, fly ash, etc.) into the boiler combustion system at a controlled speed and density. Its core objective is to achieve a "uniform and stable" powder supply, ensuring complete combustion, stable flame, and compliance with emission standards. A uniform density feeding device (uniform density feeding device) usually refers to a device that ensures a relatively uniform mass distribution and particle size / density distribution of materials during the feeding process, thereby achieving a stable feed flow rate, reducing vibration and impact, and improving the uniformity of ignition and combustion.

[0003] A document with publication number CN2636102Y discloses a uniform density feeding device for a pulverized coal boiler feeder. This device is installed on the pulverized coal boiler feeder and has a feed inlet at the top of its cylindrical outer shell and a discharge outlet at the bottom. Multiple layers of transverse baffles are arranged inside the cylindrical outer shell, with the discharge outlets on each baffle staggered. This simple structure achieves uniform and stable pulverized coal feeding, ensuring the combustion stability and normal operating conditions of the boiler. Furthermore, due to the uniform feeding, operators can easily perform optimal combustion control based on the airflow and pulverized coal ratio, achieving energy saving and consumption reduction.

[0004] In traditional boiler pulverizers with uniform density feeding devices, if raw materials clump together, the clumps are difficult to break down evenly in the hopper or conveying pipe, resulting in significant local density differences and greatly affecting the uniformity of density during feeding. Utility Model Content

[0005] The purpose of this utility model is to provide a uniform density feeding device for a boiler pulverizer, which solves the problem that if raw materials clump together, the clumps are difficult to decompose evenly in the feeding hopper or conveying pipe, resulting in significant local density differences and greatly affecting the density uniformity during feeding.

[0006] This utility model solves the above-mentioned technical problems through the following technical solution: a uniform density feeding device for a boiler pulverizer, comprising: A material tank, wherein a discharge valve is provided at the bottom of the material tank; A material leveling assembly is disposed inside the material tank. The material leveling assembly includes two filter screens fixed to the inner wall of the material tank, a dispersing component, and two striking components. The dispersing component includes a servo motor fixed to the top of the material tank, an installation rod rotating on the top of the inner wall of the material tank, and a twisting component. One end of the installation rod passes through the two filter screens in sequence and extends to the bottom of the lower filter screen. A stirring strip is fixed to the outer surface of the installation rod, and a first protrusion is fixed to the outer surface of the stirring strip.

[0007] Preferably, the twisted component includes two mounting strips fixed to the inner wall of the material tank. Each of the two mounting strips has a mounting groove. An inner spring is fixed to the inner side of the mounting groove. A connecting post slides on the inner side of the mounting groove. One end of the connecting post extends to the outer side of the mounting strip and is fixed with a fixing strip. A second protrusion is fixed to the outer surface of the fixing strip.

[0008] Preferably, a connecting strip is fixed on the mounting strip, an auxiliary strip passes through the connecting strip, and one end of the auxiliary strip is fixed to the fixing strip.

[0009] Preferably, the striking component includes a striking strip hinged to the inner wall of the tank and a positioning rod fixed to the outer surface of the mounting rod.

[0010] Preferably, the first protrusion on the stirring bar and the second protrusion on the fixing bar are staggered.

[0011] Preferably, the cross-section of the stirring bar is an isosceles trapezoid.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The servo motor drives the mounting rod to rotate, which in turn drives the stirring bar to rotate. When the stirring bar rotates, the first protrusion breaks up some easily scattered clumps of raw materials. When the stirring bar passes the corresponding two fixed bars, the first and second protrusions break up the clumps of raw materials, causing them to crack. When the stirring bar passes the two fixed bars, the fixed bars are squeezed by the stirring bar, pushing the connecting column into the mounting groove and squeezing the inner spring, thus twisting the clumps of raw materials between them apart. The fully twisted raw materials will pass through layers of filter screens and fall to the bottom of the material tank for use, avoiding the formation of clumps of raw materials that cause significant local density differences and improving the uniformity of density during feeding.

[0013] 2. When the installation rod rotates, it will drive the picking rod to rotate continuously. The inclined surface above the picking rod will continuously rub against the inclined surface at the bottom of the striking bar. Through the contact between the inclined surfaces of the two and the height of the picking rod itself, the striking bar will rotate upward a certain distance when the picking rod passes by, and fall on the filter screen after the picking rod passes by to knock the filter screen, clearing the filter screen to a certain extent and preventing the raw materials from getting stuck in the filter screen mesh and affecting the passage of the raw materials. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention.

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] Figure 3 This is a partial structural diagram of the material leveling component in this utility model.

[0017] Figure 4 This is a cross-sectional view of the twisted component in this utility model.

[0018] Figure 5 for Figure 4 Enlarged schematic diagram of part A in the middle.

[0019] Figure 6 This is a partial structural diagram of the striking component in this utility model.

[0020] The numbers in the diagram represent: 1. Material tank; 2. Discharge valve; 3. Material leveling assembly; 31. Filter screen; 32. Servo motor; 33. Mounting rod; 34. Stirring bar; 35. First protrusion; 36. Mounting bar; 37. Mounting groove; 38. Inner spring; 39. Connecting column; 310. Fixing bar; 311. Second protrusion; 312. Connecting bar; 313. Auxiliary bar; 314. Tapping bar; 315. Positioning rod. Detailed Implementation

[0021] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0022] This embodiment provides a technical solution: a uniform density feeding device for a boiler pulverizer, such as... Figures 1-6 As shown, the device includes a material tank 1 and a material leveling component 3 disposed inside the material tank 1. The bottom of the material tank 1 is provided with a discharge valve 2 and the top is provided with a feed inlet. The material leveling component 3 includes two filter screens 31 fixed to the inner wall of the material tank 1, a dispersing component and two striking components. At least two filter screens 31 are provided, and the specific number can be set according to the height of the material tank 1. The mesh size of the filter screens 31 gradually decreases from top to bottom to achieve graded and gradual dispersing. The dispersing component includes a servo motor 32 fixed to the top of the material tank 1, an installation rod 33 rotating on the top of the inner wall of the material tank 1, and a twisting component. As is well known to those skilled in the art, the working principle and wiring method of the servo motor 32 are common and are all conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selection according to their needs or convenience.

[0023] One end of the mounting rod 33 extends to the top of the material tank 1 and is fixedly connected to one end of the output shaft of the servo motor 32. The other end of the mounting rod 33 passes through the two filter screens 31 in sequence and extends to the bottom of the lower filter screen 31. The mounting rod 33 is provided with a rotating support at the penetration point of the two filter screens 31 to ensure the stable rotation of the mounting rod 33 and to ensure that it will not shake or deviate during operation. The outer surface of the mounting rod 33 is fixed with a stirring strip 34. The number of stirring strips 34 can be set by the user. The cross-section of the stirring strip 34 is an isosceles trapezoid with an inclination of 90 degrees. Multiple rows of first protrusions 35 are fixed on the outer surface of the stirring strip 34.

[0024] The number of twisted components in the vertical direction is the same as the number of vertically arranged stirring bars 34. Each twisted component includes two mounting bars 36 fixed to the inner wall of the material tank 1. The two mounting bars 36 in a twisted component corresponding to a stirring bar 34 are positioned vertically above and below that stirring bar 34. Each mounting bar 36 has a mounting groove 37. An inner spring 38 is fixed to the inner side of the mounting groove 37. A connecting post 39 slides along the inner side of the mounting groove 37. One end of the connecting post 39 extends to the outer side of the mounting bar 36 and is fixed with a fixing bar 310. The strip 310 has an inclined surface with a certain angle. When the stirring strip 34 passes through the fixing strip 310, the inclined surface of the fixing strip 310 and the inclined surface of the stirring strip 34 are in contact and correspond to each other. The outer surface of the fixing strip 310 is fixed with a second protrusion 311. The first protrusion 35 on the stirring strip 34 and the second protrusion 311 on the fixing strip 310 are staggered. The mounting strip 36 is fixed with a connecting strip 312. An auxiliary strip 313 passes through the connecting strip 312. The passage is a sliding connection. One end of the auxiliary strip 313 is fixed to the fixing strip 310.

[0025] A corrugated dust cover or sealing ring (not shown in the figure) can be installed at the opening of the mounting groove 37 to prevent powder from entering and affecting the movement of the inner spring 38 and the connecting column 39.

[0026] Two striking components are respectively set on the mounting rod 33 above the two filter screens 31. The striking components include a striking strip 314 hinged to the inner wall of the material tank 1 and a positioning rod 315 fixed to the outer surface of the mounting rod 33. One end of the striking strip 314 is hinged to the inner wall of the material tank 1, and the hinge can only be deflected vertically upwards. At least four positioning rods 315 are provided, and the specific number can be set by the user. Regardless of the number of positioning rods 315, these positioning rods 315 are arranged in a circular array on the mounting rod 33. The bottom of the striking strip 314 is inclined, and the top of the positioning rod 315 is inclined. When the positioning rod 315 passes the striking strip 314, the inclined surface of the positioning rod 315 and the inclined surface of the striking strip 314 are in contact.

[0027] The striking bar 314 can be hinged to the inner wall of the material tank 1 by a torsion spring (not shown in the figure) to avoid the striking bar 314 from being affected by the high viscosity or high humidity of the powder.

[0028] In use: Raw materials are fed into the feed tank 1 through the inlet. The servo motor 32 is started, which drives the mounting rod 33 to rotate. The rotation of the mounting rod 33 causes the stirring strips 34 on its outer surface to rotate. As the stirring strips 34 rotate, they break up any easily disintegrating clumps of raw material. When the stirring strips 34 pass the two fixed strips 310 in the corresponding disintegrating element, the first protrusion 35 and the second protrusion 311, which are staggered, shear and compress the clumps of material trapped between them, breaking them up. Furthermore, when the stirring strips 34 pass the two fixed strips 310, they twist apart the clumps of raw material that have broken apart between them. As the stirring strips 34 pass the fixed strips 310, the fixed strips 310 are subjected to compression from the stirring strips 34. The pressure will push the connecting column 39 into the mounting groove 37, and the connecting column 39 will squeeze the inner spring 38. This relative movement will produce a twisting effect on the material, which will enhance the agglomeration effect. At the same time, the fixing strip 310 will drive the auxiliary strip 313 to slide in the connecting strip 312, keeping the fixing strip 310 stable when it is pushed. After the stirring strip 34 passes through two fixing strips 310, the connecting column 39 will push the fixing strip 310 to reset under the elastic force of the inner spring 38. When the stirring strip 34 passes through again, the agglomerated raw material will be twisted apart by the fixing strip 310 and its contact surface. The twisted raw material with a diameter smaller than the mesh of the filter screen 31 will pass through the filter screen 31 and fall into the next filter screen 31 or the bottom of the material tank 1 for storage and use.

[0029] When the mounting rod 33 rotates, it will drive the picking rod 315 to rotate continuously. When the picking rod 315 rotates, the inclined surface above the picking rod 315 will continuously rub against the inclined surface at the bottom of the striking bar 314. Through the contact between the inclined surfaces of the two and the height of the picking rod 315 itself, the striking bar 314 will rotate upward at a certain angle when the picking rod 315 passes by. This will cause the end of the striking bar 314 that is lifted by the picking rod 315 to move away from the filter screen 31. After the picking rod 315 passes by, it will fall on the filter screen 31 through its own weight and the action of the torsion spring to strike the filter screen 31, clearing the filter screen 31 to a certain extent and preventing the raw material from getting stuck in the mesh of the filter screen 31 and affecting the passage of the raw material.

[0030] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. A uniform density feeding device for a boiler pulverizer, characterized in that, include: Material tank (1), the bottom of which is provided with a discharge valve (2); The material leveling component (3) is located inside the material tank (1). The material leveling component (3) includes two filter screens (31) fixed to the inner wall of the material tank (1), a dispersing component and two striking components. The dispersing component includes a servo motor (32) fixed to the top of the material tank (1), an installation rod (33) rotating on the top of the inner wall of the material tank (1) and a twisting component. One end of the installation rod (33) passes through the two filter screens (31) in sequence and extends to the bottom of the lower filter screen (31). A stirring strip (34) is fixed on the outer surface of the installation rod (33). A first protrusion (35) is fixed on the outer surface of the stirring strip (34).

2. The boiler pulverizer uniform density feeding device as described in claim 1, characterized in that, The twisted component includes two mounting strips (36) fixed to the inner wall of the material tank (1). Each of the two mounting strips (36) has a mounting groove (37). An inner spring (38) is fixed to the inner side of the mounting groove (37). A connecting post (39) slides on the inner side of the mounting groove (37). One end of the connecting post (39) extends to the outer side of the mounting strip (36) and is fixed with a fixing strip (310). A second protrusion (311) is fixed on the outer surface of the fixing strip (310).

3. The boiler pulverizer uniform density feeding device as described in claim 2, characterized in that, A connecting strip (312) is fixed on the mounting strip (36), and an auxiliary strip (313) passes through the connecting strip (312). One end of the auxiliary strip (313) is fixed on the fixing strip (310).

4. The boiler pulverizer uniform density feeding device as described in claim 3, characterized in that, The striking components include a striking strip (314) hinged to the inner wall of the material tank (1) and a positioning rod (315) fixed to the outer surface of the mounting rod (33).

5. The boiler pulverizer uniform density feeding device as described in claim 2, characterized in that, The first protrusion (35) on the stirring bar (34) and the second protrusion (311) on the fixing bar (310) are staggered.

6. The boiler pulverizer uniform density feeding device as described in claim 1, characterized in that, The cross-section of the stirring bar (34) is an isosceles trapezoid.

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