A pneumatic conveying pump

Abstract

The present invention discloses a pneumatic conveying pump, which relates to the field of powder conveying equipment. The pneumatic conveying pump comprises a mixing bin, a silo and a steam nozzle. The silo is arranged above the mixing bin, a metering feeding assembly is arranged inside the mixing bin, and a steam nozzle is arranged below the metering feeding assembly. An intermediate bin is arranged in the mixing bin, and a metering wheel is arranged in the intermediate bin to measure the conveyed powder, so as to avoid the problem of a long feeding path caused by the need for weighing spiral equipment and sealing spiral equipment in the existing equipment. In addition, the intermediate bin wraps the feeding roller to avoid the low-temperature feeding roller directly contacting the surface of high-temperature steam to produce liquefied water affecting the mixing and conveying of the powder. Combined with the feeding roller conveying method from the silo to the mixing bin, better sealing performance from the mixing bin to the silo is achieved, and the problem of powder agglomeration caused by the backflow of high-pressure steam in the mixing bin into the silo is solved.

Description

Technical Field

[0001] The invention relates to a delivery pump, in particular to a pneumatic delivery pump. Background Art

[0002] The coal gasification product, coal gas, is widely used in power generation, urban heating, liquid fuel, chemical raw material synthesis, etc., and coal resources can be effectively utilized. In small and medium-sized coal gasification technologies, pulverized coal is usually mixed with steam for transportation and sprayed into the gasification furnace through the central pipe nozzle of the gasifier to participate in the gasification reaction.

[0003] The pulverized coal in the silo needs to enter the mixing silo in stages to mix with high-temperature steam, but the existing star-shaped valve, a control component for pulverized coal discharge, does not have strict sealing properties. The reverse steam airflow can easily flow back into the silo from the star-shaped valve and interfere with the discharge amount of the pulverized coal. In addition, the temperature in the silo is relatively low, and the reverse high-temperature steam pre-cools and liquefies, forming condensate mixed with pulverized coal to cause agglomeration, which in turn affects the discharge of the pulverized coal. Before entering the mixing area, the pulverized coal must pass through a weighing screw device and a sealing screw device, and its running path is long. The original equipment does not have the function of heat preservation and heating, and the local heating of the equipment is poor. The hot pulverized coal is easy to cool during operation, which is not conducive to the transportation of pulverized coal.

[0004] This technical solution proposes a pneumatic conveying pump, which optimizes the structural design of the pneumatic conveying pump, improves the conveying efficiency, improves the operating convenience, and ensures the stable operation of the equipment. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a pneumatic conveying pump, in which a metering feeding assembly is arranged in the mixing bin, and the high-temperature steam is prevented from flowing back into the silo through the cooperation of the intermediate bin and the metering wheel. A feeding roller is arranged to feed the material from the silo to the mixing bin, thereby ensuring good air tightness from the silo to the mixing bin, and facilitating the metering of pulverized coal, thereby avoiding the problem of difficulty in keeping the mixed gas warm due to the long conveying line.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pneumatic conveying pump, including a mixing bin, a silo and a steam nozzle, the silo is fixedly arranged above the mixing bin, the steam nozzle is arranged inside the mixing bin, the pulverized coal in the silo is conveyed to the mixing bin at a certain speed, and the steam nozzle sprays high-temperature steam to the input coal powder to form a mixed gas, and conveys it to the gasifier.

[0007] A metering feeding assembly is provided inside the mixing bin and penetrates the silo. The metering feeding assembly includes a feeding roller. The feeding roller penetrates the silo and extends to the inside of the mixing bin. The pulverized coal in the silo is transported to the mixing bin through the rotation of the feeding roller.

[0008] An intermediate bin is provided in the mixing bin and below the feeding roller. The pulverized coal transported into the mixing bin by the feeding roller first enters the intermediate bin to prevent the feeding roller from directly contacting the high-temperature steam, which would cause liquefied water to form on the surface of the feeding roller and be detrimental to the full mixing of the pulverized coal and the high-temperature steam.

[0009] A metering wheel is provided inside the intermediate bin. The mass of the pulverized coal entering the intermediate bin is measured by the metering wheel before being mixed with the high-temperature steam, so as to input high-temperature steam into the mixing bin according to the mass of the input pulverized coal to control the composition ratio of the mixed gas.

[0010] Preferably, a mounting plate is fixedly connected to the inner wall of the silo, a driving motor is fixedly provided on the upper surface of the mounting plate, the feeding roller passes through the mounting plate and is connected to the driving motor, and a feeding inclined plate is passed through the side of the silo.

[0011] The driving motor drives the feeding roller to rotate, and the pulverized coal is transported from the silo to the mixing silo through the rotation of the feeding roller. The pulverized coal is directly transported to the bottom of the driving motor in the silo through the feeding inclined plate, avoiding safety hazards caused by the added pulverized coal in the operation of the driving motor.

[0012] Preferably, a spiral blade is fixedly provided on the side of the feeding roller, a tapered sleeve is sleeved on the side of the feeding roller to fit the spiral blade, a mounting flange is fixedly connected to the top of the tapered sleeve, and the tapered sleeve is fixedly connected to the bottom of the silo through the mounting flange.

[0013] When the feeding roller rotates, the powder is squeezed and transported to the mixing bin through the spiral blades on the side. A tapered sleeve is arranged at the bottom of the bin to cooperate with the feeding roller to close the feeding port of the bin to prevent the high-pressure gas in the mixing bin from flowing back to the bin. The tapered sleeve structure can better seal the discharge port of the bin and make it more convenient for the feeding roller to extrude and transport the powder.

[0014] Preferably, the intermediate bin is fixedly connected to the bottom outlet of the tapered sleeve, and a discharge ramp is provided through the bottom of the intermediate bin, the discharge ramp is away from the steam nozzle and extends above the output end of the steam nozzle, the powder conveyed into the mixing bin by the feeding roller directly enters the intermediate bin, and the end of the feeding roller is protected by the intermediate bin at the same time to prevent the lower temperature feeding roller from directly contacting the high-temperature steam surface to generate liquefied water that affects the mixing of the powder.

[0015] The powder passing over the inclined surface of the discharge inclined plate is not easily affected by the high-temperature steam ejected from the steam nozzle. The powder is directly transported to the output end of the steam nozzle along the discharge inclined plate, which is beneficial to the mixing and transportation of the powder with the high-temperature steam.

[0016] Preferably, the inner wall bearing of the intermediate bin output port is provided with a fan blade, the inner wall of the intermediate bin is fixedly provided with a guide plate, the outlet end of the guide plate extends to one side of the fan blade and is fixed, and the metering wheel is rotatably provided above the fan blade.

[0017] The powder material conveyed into the intermediate bin by the feeding roller is conveyed to one side of the fan blade through the guide plate. When the powder material accumulates to a certain mass on the fan blade on one side, the limiting effect of the metering wheel on the fan blade is overcome, and the metering wheel is pushed by the fan blade to rotate. At the same time, the powder material on the fan blade is output to the outside through the bottom outlet of the intermediate bin, thereby realizing the metering of the input powder material by the metering wheel.

[0018] Preferably, the metering wheel is connected to the inner wall bearing of the intermediate bin via an intermediate rotating shaft, a shift block is fixedly connected to the side of the metering wheel, and the metering wheel is pressed against the fan blade via the shift block and is transmission-connected thereto.

[0019] When the mass of powder on the fan blade exceeds the friction resistance between the metering wheel and the intermediate bin, the metering wheel is pushed to rotate by the fan blade, and the fan blade converts the blade surface that receives the powder. At the same time, another shift block on the side of the metering wheel has the same resistance effect on the blade surface. The metering wheel can only be pushed to rotate after the mass of powder on the blade surface reaches the same mass. The powder on the rotating fan blade is discharged outward from the discharge port of the intermediate bin.

[0020] Preferably, a mounting sleeve is fixedly sleeved on the side of the intermediate rotating shaft of the metering wheel, an extension rod is hingedly provided on the side of the mounting sleeve, and a resistance disk is fixedly connected to the inner wall of the intermediate bin corresponding to the extension rod.

[0021] The extension rod contacts the resistance disk, and there is a certain amount of friction resistance between the two. When the metering wheel is subjected to a force exceeding the friction resistance, it rotates, and at the same time, the rotational inertia of the metering wheel can be avoided, ensuring that the fan blades that are tightly limited by the metering wheel are positioned at the discharge end of the guide plate.

[0022] Preferably, a guide bar is fixedly connected to the side of the intermediate rotating shaft of the metering wheel, a carry block is slidably sleeved on the side of the intermediate rotating shaft of the metering wheel via the guide bar, and a tightening spring is arranged between the carry block and the extension rod.

[0023] The advancing block slides and advances along the guide bar on the side of the middle rotating shaft of the metering wheel. The guide bar ensures that the advancing block will not change its angle relative to the metering wheel, thereby ensuring the precise adjustment of the tightening force of the extension rod by the tightening spring.

[0024] Preferably, a carry nut is threadedly sleeved on the side surface of the intermediate rotating shaft of the metering wheel, a mounting ring is connected to the side bearing of the carry nut, a push rod is fixedly connected between the mounting ring and the carry block, the carry nut presses against the mounting ring, and the carry block is positioned by the push rod on the side surface of the mounting ring, and the angle change occurring during the carry adjustment process of the carry nut will not affect the pressing effect of the pressing spring on the extension rod.

[0025] Preferably, a transmission gear is fixedly sleeved on the side of the intermediate rotating shaft of the metering wheel, and the metering wheel is meshedly connected to the metering gear via the transmission gear. Multiple groups of transmission gears are arranged in parallel, and the multiple groups of transmission gears are meshed according to a certain transmission ratio.

[0026] The metering gear passes through the intermediate bin and is fixedly sleeved with a dial at one end. The mass of the powder transported by the intermediate bin can be directly observed through the dial, and the amount of high-temperature steam introduced can be adjusted according to the amount of powder transported to achieve the adjustment of the mixed gas ratio.

[0027] The present invention discloses a pneumatic conveying pump, which has the following beneficial effects:

[0028] 1. The pneumatic conveying pump is provided with an intermediate bin in the mixing bin. A metering wheel is provided in the intermediate bin to measure the conveyed powder, so as to avoid the problem of a long feeding path caused by the need for weighing screw equipment and sealing screw equipment in the existing equipment. In addition, the intermediate bin wraps the feeding roller to avoid the low-temperature feeding roller directly contacting the high-temperature steam surface to produce liquefied water that affects the mixing and conveying of the powder. Combined with the feeding roller conveying method from the silo to the mixing bin, better sealing is achieved from the mixing bin to the silo, and the problem of powder agglomeration caused by the backflow of high-pressure steam in the mixing bin into the silo is solved.

[0029] 2. The pneumatic conveying pump uses the rotating feeding roller to convey pulverized coal from the silo to the mixing silo. The output port of the silo is closed to prevent the high-temperature steam in the mixing silo from flowing back to the silo and causing pulverized coal to agglomerate. An intermediate silo is set on the outside of the feeding roller to prevent the high-temperature steam in the mixing silo from directly contacting the end of the feeding roller to cause water vapor liquefaction. Furthermore, the bolts at the bottom of the silo are provided with a tapered sleeve that is adapted to the feeding roller, which further ensures the sealing of the silo and facilitates the replacement of wear parts.

[0030] 3. The pneumatic conveying pump conveys the pulverized coal to the outlet of the steam nozzle through the discharge inclined plate in the middle bin. The discharge inclined plate facing away from the steam nozzle prevents the conveyed pulverized coal from being affected by the airflow in the mixing bin, and directly contacts the high-temperature and high-pressure steam sprayed from the steam nozzle, which is conducive to the full mixing and conveying of the materials.

[0031] 4. The pneumatic conveying pump has a metering wheel and fan blades inside the middle bin. The metering wheel is in close contact with the fan blades and uses the friction between itself and the side wall of the middle bin to apply resistance to the fan blades, so that the metering of the pulverized coal passing through the middle bin is achieved by adjusting the resistance. An extension rod close to the side wall of the middle bin is provided on the side of the middle rotating shaft of the metering wheel. The elastic force of the pressing spring on the extension rod is adjusted by the advance nut, so that the metering wheel can be pushed to rotate only after the pulverized coal on the blade surface accumulates to a certain mass, thereby achieving accurate metering of the material. In addition, a guide plate for conveying materials is also provided on the inner side of the middle bin, which conveys the pulverized coal delivered into the middle bin by the feed roller to a blade surface in the rotation direction of the fan blade, thereby achieving the purpose of driving the fan blade by mass.

[0032] 5. The pneumatic conveying pump is provided with a plurality of meshing metering gears with a certain gear ratio through a metering wheel. The mass of pulverized coal passing through the intermediate bin can be visually checked through the indicator disks fixed to the metering gears respectively. The volume of high-temperature steam delivered by the steam nozzle to the mixing bin is controlled according to the indicator disks, thereby realizing the control of the proportion of the mixed gas components. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the internal structure of the mixing bin of the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of the metering feeding assembly of the present invention;

[0037] Figure 4 It is a schematic diagram of the matching structure of the feed roller and the tapered sleeve of the present invention;

[0038] Figure 5 This is a schematic diagram of the intermediate bin feeding structure of the present invention;

[0039] Figure 6 This is an enlarged view of the metering wheel structure of the present invention;

[0040] Figure 7 This is a schematic diagram of the metering wheel tightening adjustment structure of the present invention;

[0041] Figure 8 It is a schematic diagram of the metering wheel transmission metering structure of the present invention.

[0042] In the figure: 1. mixing bin; 2. silo; 3. steam nozzle; 4. metering feeding assembly; 401. feeding roller; 402. intermediate bin; 403. metering wheel; 5. mounting plate; 6. driving motor; 7. feeding ramp; 8. spiral blade; 9. tapered sleeve; 10. mounting flange; 11. discharging ramp; 12. fan blade; 13. guide plate; 14. shift block; 15. mounting sleeve; 16. extension rod; 17. resistance plate; 18. guide strip; 19. advance block; 20. holding spring; 21. advance nut; 22. mounting ring; 23. push rod; 24. transmission gear; 25. metering gear; 26. indicator plate. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The embodiment of the present invention discloses a pneumatic conveying pump;

[0045] According to the attached Figure 1-2 As shown, it includes a mixing bin 1, a material bin 2 and a steam nozzle 3. The material bin 2 is arranged above the mixing bin 1, a metering feeding component 4 is arranged inside the mixing bin 1, and the steam nozzle 3 is arranged below the metering feeding component 4.

[0046] The pulverized coal in the silo 2 is metered and transported to the mixing silo 1 through the metering feeding component 4. The volume of high-temperature steam introduced into the mixing silo 1 by the steam nozzle 3 is adjusted accordingly according to the indication of the metering feeding component 4, so as to achieve the purpose of regulating the composition ratio of the mixed gas.

[0047] According to the attached Figure 2 As shown, a mounting plate 5 is fixedly arranged on the top of the silo 2, which is used not only to install the drive motor 6 but also to seal the silo 2 to prevent dust from affecting the normal operation of the drive motor 6 when pulverized coal is added to the silo 2, thereby preventing the safety hazard of dust explosion.

[0048] A feeding inclined plate 7 is provided through the side of the silo 2 , and the pulverized coal material is directly added into the silo 2 through the feeding inclined plate 7 .

[0049] According to the attached Figure 3As shown, the metering feeding assembly 4 includes a feeding roller 401, which is connected to the driving motor 6, and the feeding roller 401 extends through the silo 2 to the inside of the mixing silo 1, and the pulverized coal in the silo 2 is transported to the mixing silo 1 through the rotation of the feeding roller 401. An intermediate bin 402 is fixedly provided inside the mixing silo 1, and the intermediate bin 402 is arranged on the outside of the feeding roller 401 to surround and protect the end of the feeding roller 401, so as to prevent the high-temperature steam in the mixing silo 1 from directly contacting the end of the feeding roller 401, resulting in liquefied water droplets affecting the mixed transportation of the pulverized coal and the high-temperature steam.

[0050] In addition, an intermediate bin 402 is provided, and the material conveying method of the feeding roller 401 is combined to seal the feed port between the bin 2 and the mixing bin 1 to prevent the high-temperature steam in the mixing bin 1 from flowing back into the bin 2 and affecting the pulverized coal material.

[0051] A metering wheel 403 is provided on the inner side of the intermediate bin 402, and the material transported to the intermediate bin 402 is metered by the metering wheel 403. The volume of high-temperature steam introduced into the mixing bin 1 by the steam nozzle 3 is adjusted accordingly according to the metering indication of the metering wheel 403, so as to achieve the purpose of regulating the composition of the mixed gas.

[0052] According to the attached Figure 4 As shown, a spiral blade 8 is fixedly provided on the side of the feeding roller 401. When the feeding roller 401 rotates, the pulverized coal in the silo 2 is transported to the mixing silo 1 through the spiral blade 8 on the side. At the same time, the high-temperature steam in the mixing silo 1 can be prevented from flowing back into the silo 2 as much as possible.

[0053] In order to cooperate with the conveying system of the feeding roller 401 and the spiral blade 8, a tapered sleeve 9 is fixedly connected to the spiral blade 8 at the bottom of the silo 2, so that the spiral blade 8 is closely attached to the inner wall of the tapered sleeve 9, thereby increasing the sealing effect of the equipment.

[0054] The top end of the tapered sleeve 9 is fixedly connected with a mounting flange 10, and the tapered sleeve 9 is fixed to the top wall of the mixing bin 1 by bolts via the mounting flange 10, so as to facilitate the replacement of parts when they are worn and ensure the sealing effect of the equipment.

[0055] According to the attached Figure 5 As shown, a discharge inclined plate 11 is fixedly provided below the intermediate bin 402, through which the pulverized coal output from the intermediate bin 402 is concentrated and transported to the output end of the steam nozzle 3. The discharge inclined plate 11 is tilted and fixed above the steam nozzle 3. The discharge inclined plate 11 prevents the airflow in the mixing bin 1 from causing the pulverized coal to be dispersed, and directly mixes with the high-temperature steam sprayed from the steam nozzle 3, which is beneficial to the full mixing and transportation of the material.

[0056] The inner side of the intermediate bin 402 is also provided with a bearing of a fan blade 12, which forms a barrier at the outlet of the intermediate bin 402. A guide plate 13 for material transportation is provided above the fan blade 12. The pulverized coal transported into the intermediate bin 402 by the feed roller 401 is transported to the blade surface on one side of the fan blade 12 through the guide plate 13. When the mass of the pulverized coal exceeds the limit, the fan blade 12 is driven to rotate. The rotation of the fan blade 12 drives the synchronous rotation of the metering wheel 403 to measure the transported pulverized coal.

[0057] According to the attached Figure 6-7 As shown, the metering wheel 403 is arranged above the fan blade 12. The metering wheel 403 is pressed against the fan blade 12 by the shifting block 14 fixed on the side. The friction between the metering wheel 403 and the side wall of the intermediate bin 402 is used to apply a certain resistance to the fan blade 12, so that the metering wheel 403 can be pushed to rotate a certain angle only after the pulverized coal on the fan blade 12 accumulates to a certain mass.

[0058] The side of the middle rotating shaft of the metering wheel 403 is fixedly sleeved with an installation sleeve 15, and an extension rod 16 extending to the side wall of the intermediate bin 402 is hingedly set through the installation sleeve 15, and a resistance disk 17 is fixedly set on the side wall of the intermediate bin 402 corresponding to the extension rod 16. The friction coefficient of the resistance disk 17 is large, and the extension rod 16 is in close contact with the resistance disk 17. A certain amount of resistance is applied to the metering wheel 403 through the extension rod 16, and the feed pulverized coal is metered by adjusting the resistance.

[0059] According to the attached Figure 7-8 As shown, a guide bar 18 is fixedly provided on the side of the middle rotating shaft of the metering wheel 403, and a carry block 19 is slidably sleeved on the side of the metering wheel 403 through the guide bar 18. A clamping spring 20 is provided between the carry block 19 and the extension rod 16. The carry block 19 applies pressure to the clamping spring 20, so that the clamping spring 20 applies a constant elastic force to the extension rod 16, thereby ensuring that the metering wheel 403 exerts a constant resistance on the fan blade 12, thereby preventing the rotational inertia of the metering wheel 403 from affecting the metering accuracy.

[0060] A carry nut 21 is provided on the side thread of the metering wheel 403, and a mounting ring 22 is provided on the side bearing of the carry nut 21. The carry nut 21 rotates for carrying, and the mounting ring 22 provided on the side bearing will not change its angle relative to the rotation adjustment of the carry nut 21. The mounting ring 22 presses against the carry block 19 through the side push rod 23, so that the carry block 19 can be adjusted for carrying along the guide bar 18 on the side of the metering wheel 403.

[0061] The end of the intermediate rotating shaft of the metering wheel 403 away from the mounting sleeve 15 passes through the side wall of the intermediate bin 402 and is fixedly sleeved with a transmission gear 24. The intermediate rotating shaft of the metering wheel 403 is meshedly connected with a metering gear 25 through the transmission gear 24. The multiple metering gears 25 are meshedly connected with each other at a certain gear ratio, and a dial 26 for convenient observation is fixedly provided through the metering gear 25. The mass of pulverized coal transported by the intermediate bin 402 can be accurately measured through the multiple dials 26.

[0062] The pneumatic conveying pump is provided with an intermediate bin 402 in the mixing bin 1. A metering wheel 403 is provided in the intermediate bin 402 to measure the conveyed pulverized coal, thereby avoiding the problem of a long feeding path caused by the need for existing equipment to pass through weighing screw equipment and sealing screw equipment. In addition, the intermediate bin 402 wraps the feeding roller 401 to avoid the lower temperature feeding roller 401 directly contacting the high-temperature steam surface to produce liquefied water that affects the mixing and conveying of the pulverized coal. Combined with the conveying method of the feeding roller 401 from the silo 2 to the mixing bin 1, better sealing is achieved from the mixing bin 1 to the silo 2, thereby solving the problem of pulverized coal material agglomeration caused by the high-pressure steam in the mixing bin 1 flowing back into the silo 2.

[0063] The pulverized coal is transported from the silo 2 to the mixing silo 1 by rotating the feeding roller 401, and the output port of the silo 2 is closed to prevent the high-temperature steam in the mixing silo 1 from flowing back to the silo 2 and causing the pulverized coal to agglomerate. An intermediate silo 402 is set on the outside of the feeding roller 401 to prevent the high-temperature steam in the mixing silo 1 from directly contacting the end of the feeding roller 401 and causing water vapor liquefaction. Furthermore, the bolts at the bottom of the silo 2 are provided with a tapered sleeve 9 that is adapted to the feeding roller 401, which further ensures the sealing of the silo 2 and facilitates the replacement of wear parts.

[0064] Furthermore, the intermediate bin 402 transports the pulverized coal to the outlet of the steam nozzle 3 through the discharge inclined plate 11. The discharge inclined plate 11 facing away from the steam nozzle 3 prevents the transported pulverized coal from being affected by the airflow in the mixing bin 1, and directly contacts the high-temperature and high-pressure steam sprayed from the steam nozzle 3, which is beneficial to the sufficient mixing and transportation of the material.

[0065] Furthermore, a metering wheel 403 and a fan blade 12 are arranged inside the intermediate bin 402. The metering wheel 403 is pressed against the fan blade 12 and the friction between the metering wheel 403 and the side wall of the intermediate bin 402 is used to apply resistance to the fan blade 12, so that the metering of the pulverized coal passing through the intermediate bin 402 is achieved by adjusting the resistance. An extension rod 16 close to the side wall of the intermediate bin 402 is arranged on the side of the intermediate rotating shaft of the metering wheel 403. The elastic force of the pressing spring 20 on the extension rod 16 is adjusted by the advance nut 21, so that the pulverized coal on the blade surface of the fan blade 12 accumulates to a certain mass before pushing the metering wheel 403 to rotate, thereby achieving accurate metering of the material. In addition, a guide plate 13 for conveying materials is also arranged on the inner side of the intermediate bin 402, which conveys the pulverized coal delivered into the intermediate bin 402 by the feeding roller 401 to a blade surface in the rotation direction of the fan blade 12, thereby achieving the purpose of driving the fan blade 12 by mass.

[0066] In addition, a plurality of meshingly connected metering gears 25 are arranged with a certain gear ratio through the metering wheel 403, and the mass of the pulverized coal passing through the intermediate bin 402 is visually checked through the indicator disks 26 respectively fixed to the metering gears 25. The volume of high-temperature steam delivered by the steam nozzle 3 to the mixing bin 1 is controlled according to the indication, thereby realizing the control of the proportion of the mixed gas components.

[0067] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pneumatic conveying pump, comprising a mixing bin (1), a material bin (2) and a steam nozzle (3), wherein the material bin (2) is fixedly arranged above the mixing bin (1), and the steam nozzle (3) is arranged inside the mixing bin (1), characterized in that: A metering feeding assembly (4) is provided inside the mixing bin (1) and passes through the silo (2). The metering feeding assembly (4) comprises a feeding roller (401). The feeding roller (401) passes through the silo (2) and extends to the inside of the mixing bin (1). An intermediate bin (402) is provided inside the mixing bin (1) and below the feeding roller (401). A metering wheel (403) is provided inside the intermediate bin (402). The feeding roller (401) transports the pulverized coal in the silo (2) to the intermediate bin (402), and the metering wheel (403) meters the fed pulverized coal. A spiral blade (8) is fixedly provided on the side of the feeding roller (401), a tapered sleeve (9) is sleeved on the side of the feeding roller (401) to fit the spiral blade (8), a mounting flange (10) is fixedly connected to the top of the tapered sleeve (9), and the tapered sleeve (9) is fixedly connected to the bottom of the silo (2) via the mounting flange (10); The intermediate bin (402) is fixedly connected to the bottom outlet of the tapered sleeve (9), and a discharge inclined plate (11) is provided through the bottom of the intermediate bin (402), and the discharge inclined plate (11) faces away from the steam nozzle (3) and extends above the output end of the steam nozzle (3); A fan blade (12) is disposed on the inner wall bearing of the output port of the intermediate bin (402), a guide plate (13) is fixedly disposed on the inner wall of the intermediate bin (402), the outlet end of the guide plate (13) extends to one side of the fan blade (12) and is fixed thereto, and the metering wheel (403) is rotatably disposed above the fan blade (12); The metering wheel (403) is connected to the inner wall bearing of the intermediate bin (402) via an intermediate rotating shaft, a shifting block (14) is fixedly connected to the side of the metering wheel (403), and the metering wheel (403) is in tight contact with the fan blade (12) via the shifting block (14) and is transmission-connected thereto.

2. The pneumatic conveying pump according to claim 1, characterized in that: The inner wall of the silo (2) is fixedly connected to a mounting plate (5), the upper surface of the mounting plate (5) is fixedly provided with a driving motor (6), the feeding roller (401) passes through the mounting plate (5) and is connected to the driving motor (6), and a feeding inclined plate (7) is provided through the side of the silo (2).

3. The pneumatic conveying pump according to claim 1, characterized in that: A mounting sleeve (15) is fixedly sleeved on the side of the middle rotating shaft of the metering wheel (403), an extension rod (16) is hingedly provided on the side of the mounting sleeve (15), and a resistance disk (17) is fixedly connected to the inner wall of the intermediate bin (402) corresponding to the extension rod (16).

4. The pneumatic conveying pump according to claim 1, characterized in that: A guide bar (18) is fixedly connected to the side of the intermediate rotating shaft of the metering wheel (403), a carry block (19) is slidably sleeved on the side of the intermediate rotating shaft of the metering wheel (403) via the guide bar (18), and a pressing spring (20) is provided between the carry block (19) and the extension rod (16).

5. The pneumatic conveying pump according to claim 1, characterized in that: A side thread sleeve of the intermediate rotating shaft of the metering wheel (403) is provided with an advance nut (21), a side bearing of the advance nut (21) is connected with a mounting ring (22), and a push rod (23) is fixedly connected between the mounting ring (22) and the advance block (19).

6. The pneumatic conveying pump according to claim 1, characterized in that: A transmission gear (24) is fixedly sleeved on the side of the intermediate rotating shaft of the metering wheel (403), and the metering wheel (403) is meshingly connected to a metering gear (25) via the transmission gear (24). The metering gear (25) passes through the intermediate compartment (402) and has an indicator disk (26) fixedly sleeved on one end.

Images