Spherical air-intake powder fuel supply device

Abstract

The present invention provides a spherical air-intake powder fuel supply device. The spherical air-intake powder fuel supply device comprises a powder box straight end cover, a powder box rear end cover arranged at one end of the powder box straight end cover, a conical fluidizing tube sleeve cover arranged at the other end of the powder box straight end cover relative to the powder box rear end cover, and a flat rigid piston arranged in the powder box straight end cover. The space enclosed by the powder box straight end cover, the flat rigid piston and the conical fluidizing tube sleeve cover is a fluidizing chamber for accommodating powder fuel. A spherical air outlet chamber and a straight fluidizing gas supply pipe arranged on the spherical air outlet chamber are provided in the cavity. One end of the straight fluidizing gas supply pipe away from the spherical air outlet chamber extends to the outside through the conical fluidizing tube sleeve cover. A driving gas inlet hole and a flange hole are provided on the powder box rear end cover. The spherical air-intake powder fuel supply device of the present invention has good fluidization performance.

Description

Technical Field

[0001] The invention relates to the field of aerospace power technology such as powder engines, powder ramjet engines and powder rocket engines, and mainly to a spherical air-intake powder fuel supply device. Background Art

[0002] Powder engines are a new type of engines that use metal powder (magnesium, aluminum, etc.) as fuel and liquid, powder or gas as oxidant. Since powder fuel is granular, it can realize adjustable fuel supply and flexible flow rate adjustment, so that the engine has the advantages of multi-pulse start-stop ignition and adjustable thrust, making powder engines better suitable for aerospace propulsion and space exploration, and are gradually gaining widespread attention and research. At present, by mixing different fuels and oxidizers, many types of powder engines have been developed at home and abroad, such as powder fuel ramjet engines for missile systems, aluminum / ammonium perchlorate powder rocket engines, magnesium / carbon dioxide powder engines for Mars exploration and lunar development, aluminum / oxygen rocket engines, and powder fuel water ramjet engines for hypersonic torpedoes. As mentioned above, different types of powder engines have a common problem: how to achieve full fluidization and uniform delivery of powder fuel.

[0003] At present, powder fuel supply devices are mainly divided into two categories: motor-driven powder supply system and pneumatic-driven piston powder supply system. In the motor-driven type, the power conversion performance of the guide rod is poor. In contrast, the pneumatic-driven piston powder supply system is simpler and more efficient. The working principle is to add a flat rigid piston structure in the straight section of the powder box. The piston moves forward continuously under the action of the driving gas pressure, pushing the powder in the fluidizing chamber forward. In addition, due to the entrainment of the fluidizing gas at the convergent section, the powder fuel is output from the powder box and flows into the combustion chamber. In the above-mentioned pneumatic-driven piston powder supply system, the intake mode of the fluidizing gas is annular gap intake or annular hole intake, and the annular gap or annular hole is distributed on the surface of the conical convergent section. Compared with the surface intake, the fluidizing gas introduced into the powder box can better mix and fluidize the powder and the fluidizing gas. On the other hand, the quality of the powder fluidization performance directly determines the transportation stability of the powder fuel, which in turn affects the combustion performance of the powder engine.

[0004] Therefore, in order to achieve efficient fluidization of powder fuel and apply it to practical engineering applications, it is necessary to solve the problem of low fluidization performance caused by the air intake method. In the air pressure driven piston powder supply system, the flat rigid piston pushes the powder forward, and the fluidizing gas entrains the powder particles to output the powder box. Whether the particles can be fully fluidized under the entrainment of the fluidizing gas, and then achieve efficient fluidization and improve the transportation stability, becomes the main problem. Summary of the invention

[0005] Based on this, in order to solve the problem of fluidization performance of powder fuel in a powder box, a spherical air-intake powder fuel supply device is provided.

[0006] The present invention provides a spherical air-intake powder fuel supply device, comprising a powder box straight end cover, a powder box rear end cover arranged at one end of the powder box straight end cover, a conical fluidizing tube sleeve cover arranged at the other end of the powder box straight end cover relative to the powder box rear end cover, and a flat rigid piston arranged in the powder box straight end cover. The space enclosed by the powder box straight end cover, the flat rigid piston and the conical fluidizing tube sleeve cover is a fluidizing chamber for accommodating powder fuel. A spherical air outlet chamber and a straight fluidizing gas supply pipe arranged on the spherical air outlet chamber are arranged in the cavity. One end of the straight fluidizing gas supply pipe away from the spherical air outlet chamber extends to the outside through the conical fluidizing tube sleeve cover. A driving gas inlet hole and a flange hole are opened on the powder box rear end cover. A truncated cone fluidizing cover is arranged on the inner surface of the conical fluidizing tube sleeve cover.

[0007] Furthermore, the truncated cone fluidization cover has an inward-shaped throat.

[0008] Furthermore, a plurality of fluidizing gas outlet holes are evenly distributed on the spherical surface of the spherical outlet chamber.

[0009] Furthermore, the rear end cover of the powder box is connected to the straight end cover of the powder box via a stud, the stud is fastened via a nut, and a spring washer is provided between the stud and the nut.

[0010] Furthermore, a first O-ring and a second O-ring are provided at the connection between the rear end cover of the powder box and the straight end cover of the powder box, a third O-ring is provided between the straight end cover of the powder box and the flat rigid piston, and a fourth O-ring is provided between the straight end cover of the powder box and the conical fluidizing cylinder sleeve cover.

[0011] Furthermore, the truncated cone fluidizing cover is connected to the conical fluidizing cylinder sleeve cover via a cylindrical pin.

[0012] Furthermore, the number of the driving gas inlets is arranged in a range of 4 to 6, and the plurality of driving gas inlets are evenly arranged on the end cover surface of the rear end cover of the powder box.

[0013] Furthermore, the straight fluidizing gas supply pipe is adjacent to the head positions of the truncated cone fluidizing cover and the conical fluidizing cylinder sleeve cover, and is fixedly connected by welding.

[0014] In the spherical air-inlet powder fuel supply device of the present invention, the spherical air outlet chamber is located in the conical convergent section. At this time, the fluidizing gas flowing into the powder box can contact the powder fuel in a larger range and can fully flow into the particle bed in the straight section of the powder box. Under the same kinetic energy fluidizing gas conditions, due to the resistance between the particles, the gas phase flowing in from the surface of the conical convergent section has a smaller action range, and the present invention also better overcomes the problem of small gas phase action range. Secondly, the present invention also takes the problem of particle deadweight into consideration during design. The position of the spherical air outlet chamber can be adjusted by the length of the straight section fluidizing gas supply pipe. During the powder fluidization process, due to the deadweight of the particles, they are easily accumulated at the bottom of the powder box and the conical convergent section. The fluidizing gas has a weak effect on the accumulated particle bed. The length of the straight section fluidizing gas supply pipe can be changed to make the fluidizing gas fully contact with the bottom powder fuel, thereby avoiding the fluidization performance of the powder fuel affected by the accumulation problem. The flexible adjustment of the length of the straight section fluidizing gas supply pipe solves this problem. In addition, the size of the fluidizing gas outlet in the spherical outlet chamber designed by the present invention can be adjusted in advance according to the particle size and the filling rate, so as to prevent the particles with smaller particle size and larger fluidizing gas outlet from flowing into the spherical outlet chamber, and to prevent the fluidizing gas outlet from being blocked due to the larger particle size and smaller fluidizing gas outlet. The spherical air-intake powder fuel supply device designed by the present invention can solve the problem of the traditional gas pressure driven piston supply device affecting the stable delivery of particles due to the air intake method, which is mainly manifested in insufficient fluidization of particles, the inability of the accumulated particles to be fully entrained by the fluidizing gas, etc. The powder supply device is applied in engineering, and the prospect is very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 It is a structural schematic diagram of the spherical air-intake powder fuel supply device of the present invention;

[0017] Figure 2 It is a schematic diagram of the piston movement process and powder fluidization process of the spherical air-intake powder fuel supply device of the present invention;

[0018] Figure 3 It is a schematic structural diagram of a straight fluidizing gas supply pipe of a spherical air-inlet type powder fuel supply device of the present invention;

[0019] Figure 4 It is a schematic structural diagram of a spherical air outlet chamber of a spherical air intake type powder fuel supply device of the present invention;

[0020] Illustrations: 1-driving gas inlet hole, 2-rear end cover of powder box, 3-first O-type rubber sealing ring, 4-second O-type rubber sealing ring, 5-nut, 6-spring washer, 7-stud, 8-straight end cover of powder box, 9-third O-type rubber sealing ring, 10-flat rigid piston, 11-powdered fuel, 12-fourth O-type rubber sealing ring, 13-truncated cone fluidizing cover, 14-conical fluidizing cylinder sleeve cover, 15-straight fluidizing gas supply pipe, 16-cylindrical pin, 17-spherical air outlet chamber. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] See also Figure 1-Figure 4 The present invention provides a spherical air-intake powder fuel supply device, comprising a powder box straight section end cover 8, a powder box rear end cover 2 arranged at one end of the powder box straight section end cover, a conical fluidizing tube sleeve cover 14 arranged at the other end of the powder box straight section end cover relative to the powder box rear end cover, and a flat rigid piston 10 arranged in the powder box straight section end cover, the space enclosed by the powder box straight section end cover, the flat rigid piston and the conical fluidizing tube sleeve cover is a fluidizing chamber for accommodating powder fuel 11, a spherical air outlet chamber 17 and a straight section fluidizing gas supply pipe 15 arranged on the spherical air outlet chamber are arranged in the cavity, one end of the straight section fluidizing gas supply pipe away from the spherical air outlet chamber extends to the outside through the conical fluidizing tube sleeve cover, a driving gas inlet hole 1 and a flange hole are opened on the powder box rear end cover, and a truncated cone fluidizing cover 13 is provided on the inner surface of the conical fluidizing tube sleeve cover.

[0025] In one embodiment, the truncated cone fluidizing cover has an inward-shaped throat. Specifically, the straight end cover of the powder box includes a threaded hole and a gasket groove, the flat rigid piston includes a gasket groove and a chamfer, the truncated cone fluidizing cover includes a welding hole, a cylindrical pin hole and an inward-shaped throat, and the conical fluidizing cylinder sleeve cover includes a flange hole, a welding hole and a cylindrical pin hole.

[0026] In one embodiment, a plurality of fluidizing gas outlet holes are evenly distributed on the spherical surface of the spherical outlet chamber.

[0027] In one embodiment, the rear end cover of the powder box is connected to the straight end cover of the powder box via a stud 7, the stud is fastened via a nut 5, and a spring washer 6 is provided between the stud and the nut.

[0028] In one embodiment, a first O-ring 3 and a second O-ring 4 are sandwiched at the connection between the rear end cover of the powder box and the straight end cover of the powder box, a third O-ring 9 is sandwiched between the straight end cover of the powder box and the flat rigid piston, and a fourth O-ring 12 is sandwiched between the straight end cover of the powder box and the conical fluidizing cylinder cover.

[0029] In one embodiment, the truncated cone fluidizing cover is connected to the conical fluidizing sleeve cover via a cylindrical pin 16 .

[0030] In one embodiment, the number of the driving gas inlets is 4-6, and the plurality of driving gas inlets are evenly arranged on the end cover surface of the rear end cover of the powder box.

[0031] In one embodiment, the straight fluidizing gas supply pipe is adjacent to the head positions of the truncated cone fluidizing cover and the conical fluidizing cylinder sleeve cover, and is fixedly connected by welding.

[0032] Among them, the rear end cover of the powder box is connected and fixed with the straight end cover of the powder box through studs, and nuts and spring washers are added at the studs for tightening and preventing loosening, and sealed with O-type rubber sealing rings to prevent the driving gas from leaking out of the driving chamber. In addition, the conical fluidizing cylinder sleeve cover and the straight end cover of the powder box are connected and fixed through studs, and nuts and spring washers are added at the studs for tightening and preventing loosening, and sealed with O-type rubber sealing rings to prevent the fluidizing gas from leaking out of the fluidizing chamber.

[0033] In addition to the welding holes, the spherical gas outlet chamber has fluidizing gas outlet holes evenly distributed on the spherical surface, and is fixedly connected to the straight fluidizing gas supply pipe by welding. The outlet of the truncated cone fluidizing cover is designed as an inward-shaped throat to control the minimum powder output.

[0034] The flat rigid piston is embedded in the end cover of the straight section of the powder box and is sealed with an O-type rubber seal ring to prevent the driving gas from entering the fluidizing chamber and the fluidizing gas from entering the driving chamber. The flat rigid piston includes a non-chamfered surface and a chamfered surface, wherein the non-chamfered end surface contacts the driving gas and drives the piston forward by gas pressure. The chamfered end surface contacts the powder fuel and is used to push the powder fuel forward.

[0035] The spherical air-intake powder fuel supply device of the present invention solves the problem of unstable powder delivery caused by the fuel in the powder box being unable to be fully fluidized by the gas during the operation of the powder engine. The powder supply device includes a rear end cover of the powder box, a straight end cover of the powder box, a flat rigid piston, a straight air supply pipe, a spherical air outlet chamber, a truncated cone fluidization cover and a conical fluidization tube cover. The rear end cover of the powder box, the straight end cover of the powder box and the conical fluidization tube cover are connected by a basic hole system and fastened with studs to form a powder storage box. The rear end cover of the powder box is provided with a driving gas inlet hole for driving the piston to move forward. The straight end cover of the powder box is smooth for smooth movement of the piston. The flat rigid piston is embedded in the straight end cover of the powder box, wherein the chamfered surface contacts the powder and the non-chamfered surface contacts the driving gas, for pushing the powder fuel forward. A contraction throat is designed at the head of the truncated cone fluidization cover. The straight air supply pipe and the spherical air outlet chamber together constitute a spherical air intake device, and are connected to the conical fluidizing cylinder cover and the truncated cone fluidizing cover by welding, which is used to fix the spherical air intake device. The working principle of the present invention is as follows: the driving gas is introduced through the air supply hole at the rear end cover of the powder box, and the gas flows into the driving chamber. The piston is driven to move forward under the action of air pressure, and the movement of the piston pushes the powder forward to fill. At the same time, the spherical air intake device introduces fluidizing gas into the conical convergent section of the powder box, which is used to entrain the fluidized powder and output the powder box through the inward throat. Compared with the annular gap air intake and the annular hole air intake method, the spherical air intake device can introduce fluidizing gas around the powder bed, which can contact the powder more fully, thereby avoiding the problem that the powder fuel cannot be fully mixed and fluidized by the fluidizing gas due to the accumulation of powder fuel.

[0036] Specifically, in the spherical air-intake powder fuel supply device of the present invention, the powder box rear end cover, the powder box straight section end cover, the truncated cone fluidizing cover and the conical fluidizing tube cover form a complete powder fuel storage tank, in which metal powder is stored; the powder box rear end cover is provided with a driving gas inlet hole and a flange hole for connection; the powder box straight section end cover is provided with threaded holes at the front and rear ends for fixing the front and rear end covers; the truncated cone fluidizing cover and the conical fluidizing tube cover form the front end cover, and welding holes are provided at the heads of the two end covers, wherein the conical fluidizing tube cover is provided with a flange hole connected to the powder box straight section end cover and a cylindrical pin hole for positioning with the truncated cone fluidizing cover, and an inward-shaped throat is provided at the head of the truncated cone fluidizing cover; the straight section fluidizing gas supply pipe is connected to the spherical air outlet chamber by welding and arranged at the center of the conical convergent section. The flat rigid piston is embedded in the straight section end cover of the powder box.

[0037] The driving gas inlet wall of the rear end cover of the powder box must be smooth, have the same inlet area, and be evenly distributed. The number is 4-6, and the air intake direction is perpendicular to the rear end cover of the powder box and flows into the driving chamber to prevent the instability of the piston caused by uneven air pressure in the driving chamber due to changes in the driving gas intake flow caused by design factors;

[0038] The rear end cover of the powder box is provided with a flange hole, and the straight end cover of the powder box is provided with 4 threaded holes, and the two are fixedly connected by studs. In order to prevent the driving gas from leaking out of the driving chamber and causing uneven air pressure, O-type rubber sealing rings are used to seal between the two end covers. In order to prevent the end cover from loosening, a spring washer is added at the stud.

[0039] The truncated cone fluidizing cover and the conical fluidizing cylinder sleeve cover are positioned by cylindrical pin holes, and welding holes are provided at the heads of the two end covers for fixing the straight fluidizing gas supply pipe. The conical fluidizing cylinder sleeve cover is provided with a flange hole, which is connected and fixed to the straight end cover of the powder box by studs. To prevent the fluidizing gas from leaking out of the fluidizing chamber, the conical fluidizing cylinder sleeve cover and the straight end cover of the powder box are sealed by O-type rubber sealing rings.

[0040] The piston is in a flat shape so that the particles are subjected to uniform piston thrust. The piston includes a chamfered surface and a non-chamfered surface, wherein the chamfered end surface contacts the powder fuel and is used to push the powder fuel forward; the non-chamfered end surface contacts the driving gas and drives the piston forward by air pressure. Since it is embedded in the end cover of the straight section of the powder box, in order to prevent the driving gas from entering the fluidizing chamber and the fluidizing gas from entering the driving chamber, the flat rigid piston and the end cover of the straight section of the powder box are sealed by an O-type rubber sealing ring.

[0041] The spherical gas outlet chamber is arranged at the center of the conical convergent section and is connected and fixed to the straight section gas supply pipe through welding holes. In addition to the welding holes, the fluidizing gas outlet holes are evenly distributed on the spherical surface.

[0042] Among them, the area and number of fluidizing gas outlets on the spherical surface of the spherical air outlet chamber, the size of the spherical air outlet chamber, and the length and position of the straight fluidizing gas supply pipe can be set according to the actual size of the powder box, the powder filling rate and the particle size of the powder particles, but the spherical air outlet chamber should always be in the conical convergent section.

[0043] In order to prevent the driving gas and fluidizing gas from leaking, O-type rubber sealing rings are used to seal between the powder box rear end cover 2, the powder box straight section end cover 8, the conical fluidizing tube cover 14 and the flat rigid piston 10. The powder box rear end cover 2 includes a driving gas inlet hole 1 and a flange hole; the inlet direction of the driving gas inlet hole 1 is perpendicular to the powder box rear end cover 2 and enters the driving chamber. The powder box straight section end cover 8 includes a threaded hole and a gasket groove; the truncated cone fluidizing cover 13 includes a cylindrical pin hole, a welding hole and an inward throat; the conical fluidizing tube cover 14 includes a cylindrical pin hole, a welding hole and a flange hole. The truncated cone fluidizing cover 13 and the conical fluidizing tube cover 14 are positioned by a cylindrical pin 16. The powder fuel 11 is loaded in the powder box. The flat rigid piston 10 is embedded in the powder box straight section end cover 8. The straight fluidizing gas supply pipe 15 and the spherical gas outlet chamber 17 together form a spherical air intake device, and are fixed near the head position of the truncated cone fluidizing cover 13 and the conical fluidizing tube cover 14 by welding.

[0044] In one embodiment, the powder box rear end cover 2 is provided with four flange holes, which are arranged around the powder box rear end cover 2, two of which are arranged at the top and two at the bottom, and are distributed symmetrically with respect to the center.

[0045] The powder box rear end cover 2 is provided with driving gas inlet holes 1, the number of which is 4-6, the areas of the inlet holes are the same, and the air is taken in perpendicular to the surface of the powder box rear end cover 2, and is evenly arranged on the middle end cover surface of the powder box rear end cover 2.

[0046] The powder box straight section end cover 8 is provided with 8 threaded holes at both ends, and the front end face and the rear end face of the powder box straight section end cover 8 are respectively arranged with 4 threaded holes, and their distribution corresponds one by one to the flange holes in the powder box rear end cover 2 and the rear flange holes of the conical fluidizing cylinder sleeve cover 14, and two are arranged above the front and rear end faces of the powder box straight section end cover 8, and two are arranged below, which are distributed symmetrically with the center.

[0047] The conical fluidizing tube cover 14 is provided with four flange holes, which are arranged around the rear part of the conical fluidizing tube cover 14, two of which are arranged on the upper part and two on the lower part, and are distributed symmetrically with respect to the center.

[0048] The number of the flat rigid piston 10 is one, which is embedded in the straight section end cover 8 of the powder box, and the surface of the flat rigid piston 10 is arranged perpendicular to the surface of the straight section end cover 8 of the powder box.

[0049] The number of the truncated cone fluidizing cover 13 and the number of the conical fluidizing tube cover 14 are one each, and the two are positioned by a cylindrical pin 16, and in order to prevent the conical fluidizing tube cover 14 from falling off, it is fixed by a stud.

[0050] The connection angle between the truncated cone fluidizing cover 13 and the powder box straight section end cover 8 can be 120°, 135°, 145°, 150° or 160°.

[0051] The number of the straight fluidizing gas supply pipe 15 and the spherical air outlet chamber 17 is one each, and the two are connected by welding to form a spherical air intake device. In order to prevent the position of the spherical air intake device from affecting the process of the fluidizing gas flowing into the powder box, the spherical air intake device is fixed near the head position of the truncated cone fluidizing cover 13 and the conical fluidizing cylinder sleeve cover 14 through a welding hole.

[0052] The number of fluidizing gas outlet holes on the spherical outlet chamber 17 varies from 12 to 20 and is evenly distributed on the spherical surface.

[0053] The number of the O-type rubber sealing rings (3, 4, 9, 12) ranges from 10 to 20, and the number is determined according to the actual engineering situation. They are mainly used between the powder box rear end cover 2, the powder box straight section end cover 8, the conical fluidizing cylinder sleeve cover 14 and the flat rigid piston 10, and are arranged in a circumferential manner to prevent the driving gas and the fluidizing gas from leaking. However, the number of the O-type rubber sealing rings arranged between the flat rigid piston 10 and the powder box straight section end cover 8 should not be too large to prevent the smooth movement of the piston from being affected by excessive friction between the two.

[0054] The spherical air-intake powder fuel supply device provided by the present invention has a specific working process as follows: first, a flat rigid piston 10 is placed near the rear end cover 2 of the powder box, and then the powder fuel 11 is loaded into the powder storage box. The driving gas is introduced through the driving gas inlet hole 1 on the rear end cover 2 of the powder box, and the driving gas flows into the driving chamber. Under the action of the driving pressure, the flat rigid piston gradually moves forward, and the fluidizing gas is introduced at the same time. The fluidizing gas is supplied to the spherical air outlet chamber 17 through the straight fluidizing gas supply pipe 15, and flows into the powder box through the fluidizing gas outlet around the spherical air outlet chamber, and is mixed and fluidized with the powder fuel in the powder box, and the formed gas-solid two-phase flow is output from the powder box through the inward throat in the truncated cone fluidizing cover 13.

[0055] In the spherical air-inlet powder fuel supply device of the present invention, the spherical air outlet chamber is located in the conical convergent section. At this time, the fluidizing gas flowing into the powder box can contact the powder fuel in a larger range and can fully flow into the particle bed in the straight section of the powder box. Under the same kinetic energy fluidizing gas conditions, due to the resistance between the particles, the gas phase flowing in from the surface of the conical convergent section has a smaller action range, and the present invention also better overcomes the problem of small gas phase action range. Secondly, the present invention also takes the problem of particle deadweight into consideration during design. The position of the spherical air outlet chamber can be adjusted by the length of the straight section fluidizing gas supply pipe. During the powder fluidization process, due to the deadweight of the particles, they are easily accumulated at the bottom of the powder box and the conical convergent section. The fluidizing gas has a weak effect on the accumulated particle bed. The length of the straight section fluidizing gas supply pipe can be changed to make the fluidizing gas fully contact with the bottom powder fuel, thereby avoiding the fluidization performance of the powder fuel affected by the accumulation problem. The flexible adjustment of the length of the straight section fluidizing gas supply pipe solves this problem. In addition, the size of the fluidizing gas outlet in the spherical outlet chamber designed by the present invention can be adjusted in advance according to the particle size and the filling rate, so as to prevent the particles with smaller particle size and larger fluidizing gas outlet from flowing into the spherical outlet chamber, and to prevent the fluidizing gas outlet from being blocked due to the larger particle size and smaller fluidizing gas outlet. The spherical air-intake powder fuel supply device designed by the present invention can solve the problem of the traditional gas pressure driven piston supply device affecting the stable delivery of particles due to the air intake method, which is mainly manifested in insufficient fluidization of particles, the inability of the accumulated particles to be fully entrained by the fluidizing gas, etc. The powder supply device is applied in engineering, and the prospect is very broad.

[0056] The above embodiments only express the implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A spherical air-intake powder fuel supply device, characterized in that: The invention comprises a powder box straight section end cover, a powder box rear end cover arranged at one end of the powder box straight section end cover, a conical fluidizing cylinder sleeve cover arranged at the other end of the powder box straight section end cover relative to the powder box rear end cover, and a flat rigid piston arranged in the powder box straight section end cover. The space enclosed by the powder box straight section end cover, the flat rigid piston and the conical fluidizing cylinder sleeve cover is a fluidizing chamber for accommodating powder fuel. A spherical air outlet chamber and a straight section fluidizing gas supply pipe arranged on the spherical air outlet chamber are arranged in the fluidizing chamber. The straight section fluidizing gas supply pipe One end of the tube away from the spherical air outlet chamber extends to the outside through the conical fluidizing tube sleeve cover, a driving gas inlet hole and a flange hole are provided on the rear end cover of the powder box, a truncated cone fluidizing cover is provided on the inner surface of the conical fluidizing tube sleeve cover, the truncated cone fluidizing cover has an inward-shaped throat, a plurality of fluidizing gas outlet holes are evenly distributed on the spherical surface of the spherical air outlet chamber, the rear end cover of the powder box is connected to the straight section end cover of the powder box by a stud, the stud is fastened by a nut, and a spring washer is provided between the stud and the nut; A third O-type rubber sealing ring is sandwiched between the straight end cover of the powder box and the flat rigid piston, and the flat rigid piston includes a non-chamfered surface and a chamfered surface, the non-chamfered surface is arranged toward the rear end cover of the powder box, and the chamfered surface is arranged toward the fluidizing chamber; The position of the spherical air outlet chamber can be adjusted along with the length of the straight fluidizing gas supply pipe.

2. The spherical air-intake powder fuel supply device according to claim 1, characterized in that: A first O-ring and a second O-ring are provided at the connection between the rear end cover of the powder box and the straight end cover of the powder box, a third O-ring is provided between the straight end cover of the powder box and the flat rigid piston, and a fourth O-ring is provided between the straight end cover of the powder box and the conical fluidizing cylinder sleeve cover.

3. The spherical air-intake powder fuel supply device according to claim 2, characterized in that: The truncated cone fluidizing cover is connected to the conical fluidizing tube sleeve cover via a cylindrical pin.

4. The spherical air-intake powder fuel supply device according to claim 3, characterized in that: The number of the driving gas inlets is 4-6, and the plurality of driving gas inlets are evenly arranged on the end cover surface of the rear end cover of the powder box.

5. The spherical air-intake powder fuel supply device according to claim 4, characterized in that: The straight fluidizing gas supply pipe is adjacent to the head positions of the truncated cone fluidizing cover and the conical fluidizing cylinder sleeve cover, and is fixedly connected by welding.

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