A bale breaking device for a straw bale burning direct-fired biomass boiler

Abstract

The present invention discloses a bale breaking device for a straw bale burning direct-fired biomass boiler, comprising: a bale breaking roller assembly and a water cooling circulation system; the bale breaking roller assembly comprises two bale breaking roller main shaft tubes arranged side by side in a straw bale breaking chamber, and the outer ring side wall of each bale breaking roller main shaft tube is evenly provided with a number of bale breaking thorns, and the straw bale falling between the two bale breaking roller main shaft tubes can be broken by the bale breaking thorns, so that the straw can be split and fully burned; the water cooling circulation system can continuously circulate water cooling for the two bale breaking roller assemblies located in the high temperature environment of the straw bale breaking chamber to reduce the temperature and protect them. The bale breaking device for a straw bale burning direct-fired biomass boiler of the present invention can not only make the straw bale burn fully and thoroughly, the boiler heats up quickly, and the thermal efficiency is high, but also greatly reduce labor and labor intensity, have a high degree of automation, a low failure rate, and stronger practicality.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a straw bale breaking device for a direct-fired biomass boiler. Background Art

[0002] The existing straw bale burning boiler cannot ensure the complete combustion of the straw bale. The straw bale is burned naturally in the boiler by the blower. Not only is the combustion speed slow, but there are also disadvantages such as incomplete straw combustion, slow boiler heating, and low thermal efficiency.

[0003] Therefore, how to solve the technical shortcomings of existing straw bale burning boilers and provide a straw bale breaking device for a straw bale burning direct-fired boiler that can fully burn the straw in the boiler, has high thermal efficiency, reasonable structural design, and is easy to use is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of this, in order to overcome the above technical defects, the present invention provides a straw bale burning direct combustion biomass boiler breaking device, which effectively solves the problem of straw bale burning direct combustion.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A straw bale breaking device for a direct-fired biomass boiler is provided in a straw bale breaking chamber, wherein the straw bale breaking chamber is provided in front of a boiler feed port and is used for breaking straw bales; the bale breaking device comprises:

[0007] The bale breaking roller assembly comprises two bale breaking roller main shaft tubes arranged side by side in the straw bale breaking chamber; both ends of each bale breaking roller main shaft tube are rotatably connected to the two sides inside the straw bale breaking chamber and the two bale breaking roller main shaft tubes rotate in opposite directions; a plurality of bale breaking thorns are evenly arranged on the outer ring side wall of each bale breaking roller main shaft tube; a bale breaking roller sprocket is installed at one end of each bale breaking roller main shaft tube, and at the same time, a reduction motor is installed on the outer wall of the straw bale breaking chamber on one side of the end, the reduction motor is located between the two bale breaking roller sprockets, and two reduction motor sprockets opposite to the two bale breaking roller sprockets are respectively installed on the output shaft of the reduction motor, and the bale breaking roller sprocket and the corresponding reduction motor sprocket are driven by a chain;

[0008] A water-cooling circulation system, the water-cooling circulation system comprises a spindle inner tube arranged inside the bag breaking roller spindle tube; one end of each of the bag breaking roller spindle tubes with the bag breaking roller sprocket is connected to a spindle water inlet and outlet device combination; each of the spindle water inlet and outlet device combinations is provided with a water outlet pipe seat and a water return pipe seat; two of the water outlet pipe seats are connected together by a water outlet hose, and the water outlet hose is connected to a circulation pump; two of the water return pipe seats are connected together by a water return hose; the circulation pump and the water return hose are respectively connected to a water tank;

[0009] The circulating water enters the main shaft water inlet and outlet device combination from the water tank, the return water hose and the return water pipe seat, then enters the inside of the bag breaking roller main shaft tube along the flow gap therein, then flows back along the main shaft inner tube, and finally flows out from the water outlet pipe seat in the main shaft water inlet and outlet device combination, returns to the water tank along the water outlet hose, forming a complete water cooling circulation loop.

[0010] The straw bale-breaking device for a direct-fired biomass boiler of the present invention can not only enable the bale-breaking spikes on the main shaft tube of the bale-breaking roller to break the straw bale that falls between the main shaft tubes of the two bale-breaking rollers, so that the straw can be fully burned after being split; but also, the water-cooling circulation system in the device of the present invention can continuously circulate water to cool the two bale-breaking roller assemblies located in the high-temperature environment of the straw bale-breaking chamber, provide temperature reduction protection for the two bale-breaking roller assemblies, ensure the working capacity of the bale-breaking roller assemblies, and extend their service life.

[0011] On the basis of the above technical solution, the present invention can also make the following improvements:

[0012] Preferably, the reduction motor is fixed to the outer wall of the straw breaking bag chamber through a reduction motor seat to ensure the stability of its installation and operation.

[0013] Preferably, bearing seat connecting plates are installed on both sides of the straw bale breaking chamber, and bearing seats are fixed on the bearing seat connecting plates. Both ends of the bale breaking roller main shaft tube are connected to the bearings in the bearing seats to realize the opposite rotation of the two bale breaking roller main shaft tubes in the straw bale breaking chamber.

[0014] Preferably, the first shaft head and the second shaft head are respectively installed at both ends of the bale breaking roller main shaft tube, and the bale breaking roller sprocket is installed on the second shaft head; the bale breaking roller main shaft tube is connected to the bearings in the bearing seats on both sides of the straw bale breaking chamber through the first shaft head and the second shaft head respectively.

[0015] Preferably, one end of the second shaft head away from the first shaft head is fixedly connected to a main shaft receiving plate, and the main shaft receiving plate is fixedly connected to the main shaft water inlet and outlet device assembly.

[0016] Preferably, a first shaft retaining spring is further provided at the outer end of the second shaft head connected to the spindle receiving plate to limit the axial displacement of the second shaft head.

[0017] Preferably, the spindle water inlet and outlet device assembly includes a welded connection plate 1 equipped with the outlet pipe seat, a welded connection plate 2, a welded connection plate 3, a welded connection plate 4 equipped with the return pipe seat, and a welded connection plate 5; the bottom end of the welded connection plate 1 is sealed, and the top end is fixed with the welded connection plate 1; the two ends of the welded connection plate 4 are respectively fixed with the welded connection plate 4;

[0018] The inner diameter of the welded connection of the first connection is smaller than the inner diameter of the welded connection of the fourth connection; the first connection, the second connection with a second double-sided water seal installed on the inner side, the third connection with a bearing installed on the inner side, and the fourth connection are welded together at one end and connected by bolts to realize the connection between the welded connection of the first connection and the welded connection of the fourth connection;

[0019] The connecting plate 4 welded to the other end of the connecting plate 4 is connected to the connecting plate 5 with a bearing installed inside by bolts;

[0020] The second shaft head is connected to the first inner tube welded in the fourth connecting plate, and the main shaft inner tube is connected to the second inner tube welded in the first connecting plate;

[0021] A hinged plate is fixed to one end of the first inner tube, and the hinged plate is connected to the main shaft plate by bolts to realize the connection between the first inner tube and the second shaft head; the first inner tube is rotated in the weld of the fourth plate through the bearing; a second shaft retaining spring is provided on the port of the first inner tube extending to the second plate to limit its axial displacement; a first double-sided water seal is provided on the outer sleeve of the first inner tube to seal the two sides of the weld of the fourth plate; the first inner tube is also provided with an opening communicating with the return pipe seat;

[0022] The second inner tube is sheathed with the second double-sided water seal, one end of the second double-sided water seal seals the connection side of the connection plate 1 welded with the connection plate 4 welded, and the other end is fixed on a spring seat, the spring seat is fixed on the water outlet end of the second inner tube, and the second inner tube is provided with a third shaft retaining spring for limiting the axial displacement of the spring seat.

[0023] The above-mentioned spindle water inlet and outlet device combination structure is reliable and works stably, ensuring that the circulating water can be returned and discharged along the corresponding path without leakage.

[0024] Preferably, a connecting sleeve for a water outlet pipe is installed at the connection between the main shaft inner tube and the second inner tube.

[0025] Preferably, there is a gap between the second shaft head and the main shaft inner tube passing therethrough, and between the first inner tube and the second inner tube passing therethrough, sufficient gap for circulating water to enter. One end of the gap is connected to the return pipe seat, and the other end is connected to the main shaft tube of the bag breaking roller.

[0026] Preferably, O-rings are provided between the first and second connection plates, between the third and fourth connection plates, between the fourth and fifth connection plates, and between the main shaft connection plate and the articulated connection plate, to further ensure the sealing of the connection.

[0027] Preferably, the first shaft head and the second shaft head are fixed to the main shaft tube of the bag breaking roller via shaft head support plates; the main shaft inner tube is fixed to the main shaft tube of the bag breaking roller via a main shaft inner tube support plate.

[0028] The beneficial effects of the present invention are:

[0029] The straw bale burning direct-fired biomass boiler bale breaking device can realize the dynamic bale breaking and combustion of straw bales, which not only makes the straw bale burn fully and thoroughly, but also makes the boiler heat up quickly and has high thermal efficiency, effectively solving the problem of straw bale burning direct combustion; it also greatly reduces labor and labor intensity, has a high degree of automation, a low failure rate and is more practical; at the same time, the present invention can also implement continuous cooling protection for the bale breaking roller assembly, thereby ensuring the stability of the overall operation of the bale breaking device and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 The accompanying drawing is a schematic diagram of the installation structure of the present invention.

[0032] Figure 2 The attached picture is Figure 1 AA cross-sectional structure diagram in.

[0033] Figure 3 The accompanying drawing is a schematic structural diagram of the bag breaking roller assembly and the water cooling circulation system in the present invention.

[0034] Figure 4 The accompanying drawing is a schematic structural diagram of the bag breaking roller assembly plus the main shaft inner tube in the present invention.

[0035] Figure 5 The accompanying drawing is a schematic structural diagram of the main shaft water inlet and outlet device combination in the present invention.

[0036] Figure 6 The accompanying drawing is a schematic diagram of the welding of the connection pad 1 and the structure of the connection pad 1 in the present invention.

[0037] Figure 7 The accompanying drawing is a schematic structural diagram of the receiving plate 2 in the present invention.

[0038] Figure 8 The accompanying drawing is a schematic structural diagram of the receiving plate three in the present invention.

[0039] Fig. 9 The accompanying drawing is a schematic structural diagram of the fourth welding connection plate in the present invention.

[0040] Among them, in the figure,

[0041] 100-Straw bale breaking room;

[0042] 200- straw bales;

[0043] 300-Bag breaking device,

[0044] 301-Break the bag roller spindle tube, 302-Break the bag thorn, 303-Break the bag roller sprocket, 304-Reduction motor, 305-Reduction motor sprocket, 306-Chain, 307-Spindle inner tube, 308-Bearing seat connecting plate, 309-Bearing seat, 310-First shaft head, 311-Second shaft head, 312-Spindle connection plate, 313-First shaft retaining ring, 314-Water outlet pipe seat, 315-Return pipe seat, 316-Water outlet hose, 317-Return hose, 318-Circulation pump, 319-Connection plate one welding, 320-Connection plate one, 3 21-disc two, 322-disc three, 323-disc four welded, 324-disc four, 325-disc five, 326-circlip for second shaft, 327-jointed disc, 328-bolt, 329-first inner tube, 330-bearing, 331-second inner tube, 332-first double-sided water seal, 333-second double-sided water seal, 334-spring seat, 335-circlip for third shaft, 336-connecting sleeve for water outlet pipe, 337-O-ring, 338-shaft head support plate, 339-spindle inner tube support plate, 340-reduction motor seat. DETAILED DESCRIPTION

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] Example:

[0051] According to the following Figure 1-9 A straw bale breaking device for a direct-fired biomass boiler according to an embodiment of the present invention is described in detail.

[0052] See attached Figure 1The embodiment of the present invention discloses a straw bale breaking device for a direct-fired biomass boiler, which is arranged in a straw bale breaking chamber 100. The straw bale breaking chamber 100 is arranged in front of the boiler feed port and is used to break straw bales 200. The bale breaking device 300 includes: a bale breaking roller assembly and a water cooling circulation system.

[0053] Specifically,

[0054] See attached Figure 2 , Attachment Figure 3 The bale breaking roller assembly includes two bale breaking roller main shaft tubes 301 arranged side by side in the straw bale breaking chamber 100; both ends of each bale breaking roller main shaft tube 301 are rotatably connected to the two sides of the straw bale breaking chamber 100, and the two bale breaking roller main shaft tubes 301 rotate in opposite directions; a plurality of bale breaking spikes 302 are evenly arranged on the outer ring wall of each bale breaking roller main shaft tube 301; a bale breaking roller sprocket 303 is installed at one end of each bale breaking roller main shaft tube 301, and at the same time, the straw on one side of the end is rotated. A reduction motor 304 is installed on the outer wall of the straw breaking chamber 100, and the reduction motor 304 is fixed to the outer wall of the straw breaking chamber 100 through a reduction motor seat 340. The reduction motor 304 is located between two breaking roller sprockets 303. Two reduction motor sprockets 305 corresponding to the two breaking roller sprockets 303 are respectively installed on the output shaft of the reduction motor 304. The breaking roller sprockets 303 and the corresponding reduction motor sprockets 305 are driven by chains 306.

[0055] The water-cooling circulation system includes a spindle inner tube 307 arranged inside the bag breaking roller spindle tube 301, and the spindle inner tube 307 is fixed to the bag breaking roller spindle tube 301 through the spindle inner tube support plate 339; one end of each bag breaking roller spindle tube 301 with the bag breaking roller sprocket 303 is connected to a spindle water inlet and outlet device combination; each spindle water inlet and outlet device combination is provided with a water outlet pipe seat 314 and a water return pipe seat 315; the two water outlet pipe seats 314 are connected together by a water outlet hose 316, and the water outlet hose 316 is connected to a circulation pump 318; the two water return pipe seats 315 are connected together by a water return hose 317; the circulation pump 318 and the water return hose 317 are respectively connected to the water tank;

[0056] The circulating water enters the spindle water inlet and outlet device assembly from the water tank, the return water hose 317, and the return water pipe seat 315, then enters the inside of the bag breaking roller spindle tube 301 along the flow gap therein, and then flows back along the spindle inner tube 307, and finally flows out from the outlet pipe seat 314 in the spindle water inlet and outlet device assembly, and returns to the water tank along the outlet water hose 316, forming a complete water cooling circulation loop.

[0057] More specifically,

[0058] See attached Figure 2 , Attachment Figure 4Bearing seat connecting plates 308 are installed on both sides of the straw bale breaking chamber 100, and bearing seats 309 are fixed on the bearing seat connecting plates 308. The first shaft head 310 and the second shaft head 311 are respectively installed at both ends of the bale breaking roller main shaft tube 301, and the second shaft head 311 is equipped with a bale breaking roller sprocket 303; the bale breaking roller main shaft tube 301 is connected to the bearings in the bearing seats 309 on both sides of the straw bale breaking chamber 100 through the first shaft head 310 and the second shaft head 311, respectively, to realize the opposite rotation of the two bale breaking roller main shaft tubes 301 in the straw bale breaking chamber 100.

[0059] Among them, see Appendix Figure 4 The first shaft head 310 and the second shaft head 311 are fixed to the main shaft tube 301 of the bag breaking roller through the shaft head support plate 338.

[0060] One end of the second shaft head 311 away from the first shaft head 310 is fixedly connected to a main shaft receiving plate 312 , and the main shaft receiving plate 312 is fixedly connected to the main shaft water inlet and outlet device assembly.

[0061] A first shaft retaining spring 313 is also provided at the outer end of the second shaft head 311 connected to the main shaft receiving plate 312 to limit the axial displacement of the second shaft head 311 .

[0062] For further information, see Appendix Figure 5 The spindle water inlet and outlet device assembly includes a connection plate 1 welded 319 equipped with an outlet pipe seat 314, a connection plate 2 321, a connection plate 3 322, a connection plate 4 welded 323 equipped with a return pipe seat 315, and a connection plate 5 325; the bottom end of the connection plate 1 welded 319 is sealed, and the top end is fixed with the connection plate 1 320; the two ends of the connection plate 4 welded 323 are respectively fixed with the connection plate 4 324.

[0063] See attached Figure 6 To Attachment Fig. 9 In view of the fact that the inner diameter of the connection plate one weld 319 is smaller than the inner diameter of the connection plate four weld 323, the connection plate one 320, the connection plate two 321 with the second double-sided water seal 333 installed on the inner side, the connection plate three 322 with the bearing 330 installed on the inner side, and the connection plate four 324 at one end of the connection plate four weld 323 are connected together by bolts 328 to realize the connection between the connection plate one weld 319 and the connection plate four weld 323.

[0064] The connecting plate 4 324 at the other end of the connecting plate 4 welding 323 is connected to the connecting plate 5 325 with the bearing 330 installed inside by a bolt 328.

[0065] The second shaft head 311 is connected to and extended to the first inner tube 329 in the fourth connecting plate weld 323 , and the main shaft inner tube 307 is connected to and extended to the second inner tube 331 in the first connecting plate weld 319 .

[0066] A hinged connection plate 327 is fixed to one end of the first inner tube 329, and the hinged connection plate 327 and the main shaft connection plate 312 are connected together by bolts 328 to realize the connection between the first inner tube 329 and the second shaft head 311; the first inner tube 329 is rotated in the connection plate four weld 323 through a bearing 330; the first inner tube 329 extends to the port at the connection plate two 321 and is provided with a second shaft retaining spring 326 for limiting its axial displacement; the first inner tube 329 is provided with a first double-sided water seal 332 on the outside to seal the two sides of the connection plate four weld 323; the first inner tube 329 is also provided with an opening connected to the return pipe seat 315.

[0067] The second inner tube 331 is sheathed with a second double-sided water seal 333, one end of the second double-sided water seal 333 seals the connection side between the connection plate one weld 319 and the connection plate four weld 323, and the other end is fixed on a spring seat 334. The spring seat 334 is fixed on the water outlet end of the second inner tube 331, and the second inner tube 331 is provided with a third shaft retaining spring 335 for limiting the axial displacement of the spring seat 334.

[0068] In the above, there is a gap between the second shaft head 311 and the main shaft inner tube 307 passing therethrough, and between the first inner tube 329 and the second inner tube 331 passing therethrough, which is sufficient for circulating water to enter. One end of the gap is connected to the return water pipe seat 315, and the other end is connected to the main shaft tube 301 of the bag breaking roller.

[0069] In order to further optimize the above technical solution of this embodiment, a connecting sleeve 336 for a water outlet pipe is installed at the connection between the main shaft inner tube 307 and the second inner tube 331 .

[0070] In order to further optimize the above technical solution of this embodiment, O-rings 337 are correspondingly provided between the first connection plate 320 and the second connection plate 321, between the third connection plate 322 and the fourth connection plate 324, between the fourth connection plate 324 and the fifth connection plate 325, and between the main shaft connection plate 312 and the hinge connection plate 327.

[0071] The specific working principle of the present invention is:

[0072] The reduction motor 304 drives the two bale breaking roller main shaft tubes 301 to rotate in opposite directions through the reduction motor sprocket 305, the chain 306 and the bale breaking roller sprocket 303. The bale breaking spikes 302 on the bale breaking roller main shaft tube 301 will break the straw bale 200 that falls between the two bale breaking roller main shaft tubes 301. At the same time, the broken straw is burned under the bale breaking roller assembly and on the boiler grate. The broken straw is burned and falls onto the chain grate, and enters the boiler furnace through the movement of the grate to be fully burned again.

[0073] Since the bag breaking roller main shaft tube 301 rotates in the flame, in order to ensure the safe and reliable operation of the bag breaking roller assembly, the bag breaking roller assembly adopts a circulating water cooling method in structure. The cold water in the water tank enters the bag breaking roller main shaft tube 301 through the return pipe seat 315 at one end of the main shaft water inlet and outlet device combination for cooling and heat exchange. After the heat exchange, the hot water is pumped out from the main shaft inner tube 307 along the water outlet pipe seat 314 in the main shaft water inlet and outlet device combination into the water tank under the action of the circulating pump 318, so as to realize the temperature reduction protection of the bag breaking device of the present invention.

[0074] After adopting the above-mentioned structure of the present invention, the straw bale 200 realizes dynamic bale breaking and combustion in the boiler, the combustion is sufficient and thorough, the boiler heats up quickly, and the thermal efficiency is high; it greatly reduces labor and labor intensity, has a high degree of automation, a low failure rate, and strong practicality, and is very suitable for promotion and application.

[0075] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0076] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A straw bale breaking device for a direct-fired biomass boiler, arranged in a straw bale breaking chamber (100), wherein the straw bale breaking chamber (100) is arranged in front of a boiler feed inlet and is used for breaking straw bales (200); characterized in that: The bag breaking device (300) comprises: A bale breaking roller assembly, the bale breaking roller assembly comprising two bale breaking roller main shaft tubes (301) arranged side by side in the straw bale breaking chamber (100); both ends of each bale breaking roller main shaft tube (301) are rotatably connected to two sides of the straw bale breaking chamber (100), and the two bale breaking roller main shaft tubes (301) rotate in opposite directions; a plurality of bale breaking spikes (302) are evenly arranged on the outer ring side wall of each bale breaking roller main shaft tube (301); a bale breaking roller is installed at one end of each bale breaking roller main shaft tube (301) A sprocket (303) is provided, and a reduction motor (304) is installed on the outer wall of the straw bale breaking chamber (100) on one side of the end, the reduction motor (304) is located between the two bale breaking roller sprockets (303), and two reduction motor sprockets (305) are respectively installed on the output shaft of the reduction motor (304) and are located opposite to the two bale breaking roller sprockets (303), and the bale breaking roller sprockets (303) and the corresponding reduction motor sprockets (305) are driven by a chain (306); A water-cooling circulation system, the water-cooling circulation system comprising a spindle inner tube (307) arranged inside the bag breaking roller spindle tube (301); one end of each of the bag breaking roller spindle tubes (301) with the bag breaking roller sprocket (303) is connected to a spindle water inlet and outlet device combination; each of the spindle water inlet and outlet device combinations is provided with a water outlet pipe seat (314) and a water return pipe seat (315); two of the water outlet pipe seats (314) are connected together by a water outlet hose (316), and the water outlet hose (316) is connected to a circulation pump (318); two of the water return pipe seats (315) are connected together by a water return hose (317); the circulation pump (318) and the water return hose (317) are respectively connected to a water tank; Circulating water enters the spindle water inlet and outlet device assembly from the water tank, the water return hose (317), and the water return pipe seat (315), then enters the inside of the bag breaking roller spindle tube (301) along the circulation gap therein, then flows back along the spindle inner tube (307), and finally flows out from the water outlet pipe seat (314) in the spindle water inlet and outlet device assembly, and returns to the water tank along the water outlet hose (316), thereby forming a complete water cooling circulation loop; Bearing seat connecting plates (308) are installed on both sides of the straw bale breaking chamber (100), a bearing seat (309) is fixed on the bearing seat connecting plates (308), and both ends of the bale breaking roller main shaft tube (301) are connected to the bearings in the bearing seat (309), so that the two bale breaking roller main shaft tubes (301) can rotate in opposite directions in the straw bale breaking chamber (100); A first shaft head (310) and a second shaft head (311) are respectively mounted on both ends of the bale breaking roller main shaft tube (301), and the bale breaking roller sprocket (303) is mounted on the second shaft head (311); the bale breaking roller main shaft tube (301) is connected to bearings in bearing seats (309) on both sides of the straw bale breaking chamber (100) via the first shaft head (310) and the second shaft head (311); One end of the second shaft head (311) away from the first shaft head (310) is fixedly connected to a main shaft receiving plate (312), and the main shaft receiving plate (312) is fixedly connected to the main shaft water inlet and outlet device assembly; The spindle water inlet and outlet device assembly comprises a first welded connection plate (319) equipped with the outlet pipe seat (314), a second welded connection plate (321), a third welded connection plate (322), a fourth welded connection plate (323) equipped with the return pipe seat (315), and a fifth welded connection plate (325); the bottom end of the first welded connection plate (319) is sealed, and the top end is fixed with the first welded connection plate (320); the two ends of the fourth welded connection plate (323) are respectively fixed with the fourth welded connection plate (324); The inner diameter of the connection plate one weld (319) is smaller than the inner diameter of the connection plate four weld (323); the connection plate one (320), the connection plate two (321) with a second double-sided water seal (333) installed on the inner side, the connection plate three (322) with a bearing (330) installed on the inner side, and the connection plate four (324) at one end of the connection plate four weld (323) are connected together by bolts (328) to realize the connection between the connection plate one weld (319) and the connection plate four weld (323); The connecting plate 4 (324) at the other end of the connecting plate 4 welded (323) is connected to the connecting plate 5 (325) with a bearing (330) installed inside thereof by means of bolts (328); The second shaft head (311) is butt-jointed to extend to the first inner tube (329) in the fourth connection plate weld (323), and the main shaft inner tube (307) is butt-jointed to extend to the second inner tube (331) in the first connection plate weld (319); A hinged connection plate (327) is fixed to one end of the first inner tube (329), and the hinged connection plate (327) and the main shaft connection plate (312) are connected together by bolts (328) to realize the connection between the first inner tube (329) and the second shaft head (311); the first inner tube (329) is rotated in the fourth connection plate weld (323) through the bearing (330); a second shaft retaining spring (326) for limiting its axial displacement is provided on the port of the first inner tube (329) extending to the second connection plate (321); a first double-sided water seal (332) is provided on the outer surface of the first inner tube (329) to seal the two sides of the fourth connection plate weld (323); the first inner tube (329) is also provided with an opening that communicates with the return pipe seat (315); The second inner tube (331) is sheathed with the second double-sided water seal (333), one end of the second double-sided water seal (333) seals the connection side of the first connection plate weld (319) and the fourth connection plate weld (323), and the other end is fixed on a spring seat (334), the spring seat (334) is fixed on the water outlet end of the second inner tube (331), and the second inner tube (331) is provided with a third shaft retaining spring (335) for limiting the axial displacement of the spring seat (334); The first shaft head (310) and the second shaft head (311) are fixed to the bag breaking roller main shaft tube (301) via a shaft head support plate (338); and the main shaft inner tube (307) is fixed to the bag breaking roller main shaft tube (301) via a main shaft inner tube support plate (339).

2. The straw bale breaking device for direct-fired biomass boiler according to claim 1 is characterized in that: A first shaft retaining spring (313) is also provided at the outer end of the second shaft head (311) connected to the main shaft receiving plate (312) to limit the axial displacement of the second shaft head (311).

3. The straw bale breaking device for direct-fired biomass boiler according to claim 1 is characterized in that: A connecting sleeve (336) for a water outlet pipe is installed at the connection between the main shaft inner tube (307) and the second inner tube (331).

4. The straw bale breaking device for direct-fired biomass boiler according to claim 1 is characterized in that: There is a gap between the second shaft head (311) and the main shaft inner tube (307) passing therethrough, and between the first inner tube (329) and the second inner tube (331) passing therethrough, sufficient for circulating water to enter; one end of the gap is connected to the return pipe seat (315), and the other end is connected to the main shaft tube (301) of the bag breaking roller.

5. The straw bale breaking device for direct-fired biomass boiler according to claim 1 is characterized in that: O-type sealing rings (337) are correspondingly provided between the first receiving plate (320) and the second receiving plate (321), between the third receiving plate (322) and the fourth receiving plate (324), between the fourth receiving plate (324) and the fifth receiving plate (325), and between the main shaft receiving plate (312) and the hinged receiving plate (327).

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