Biomass power generation furnace front rotary unloading bin

Abstract

The present invention provides a biomass power generation furnace front rotary unloading silo, which relates to the technical field of biomass power generation equipment, including a silo cylinder, a rotating chassis and a drop pipe. A cantilevered discharge screw module is provided in the silo cylinder, and the rotating chassis is embedded in the lower end of the silo cylinder. A reduction motor 1 for driving the cantilevered discharge screw module is provided at the lower end of the rotating chassis. A reduction motor 2 for driving the rotating chassis is also provided at the lower end of the silo cylinder, wherein the cantilevered discharge screw module includes a discharge screw shaft, an eccentric turntable and a positioning bearing seat, and a plurality of cutting knife mechanisms are embedded in the discharge screw shaft. The beneficial effects of the present invention are as follows: a bolt power coordination structure of revolution and rotation is adopted to prevent bridging of materials in the silo; active anti-entanglement and efficient cutting of biomass materials are achieved through the segmented screw shaft and modular cutting knife mechanism, and parts replacement is facilitated, maintenance time is reduced, and service life is increased.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of biomass power generation equipment, and in particular to a self-rotating unloading bin in front of a biomass power generation furnace. Background Art

[0002] In the field of biomass power generation, fuels such as bark, rice husks, and straw are high in fiber, easy to tangle, and have large fluctuations in moisture content. The spiral conveying mechanism of the traditional furnace unloading bin often causes blockage due to material bridging or entanglement, affecting the continuity of the boiler fuel supply.

[0003] In the existing technology, some equipment alleviates entanglement by adding a vibration device or optimizing the angle of the spiral blade, but lacks the ability to actively cut long strips of material. Especially when processing poorly crushed straw or mixed garbage containing film, material agglomerates are easily formed in the middle section and bearing parts of the spiral shaft, resulting in an increased frequency of equipment shutdown and maintenance.

[0004] In addition, traditional unloading silos generally have problems with poor synchronization of the drive system and insufficient material level monitoring accuracy: the speed matching of revolution and rotation relies on mechanical transmission, which is difficult to dynamically adjust according to the material status, and the discharge volume stability is low; the cutting mechanism is mostly fixed and cannot be retracted under non-entanglement conditions, which easily increases the material conveying resistance, resulting in existing equipment in the feeding system in front of biomass power generation furnaces. Problems such as insufficient reliability, high energy consumption, and high maintenance costs. Summary of the Invention

[0005] 1. Technical problem to be solved by the invention:

[0006] The present invention provides a biomass power generation furnace front rotary unloading bin, which is used to solve the technical problems existing in the above-mentioned background technology.

[0007] 2. Technical solution:

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is as follows: a self-rotating unloading silo in front of a biomass power generation furnace, comprising a silo cylinder, a rotating chassis, a drop pipe and a feed hopper, a cantilevered discharge screw module is provided in the silo cylinder, the rotating chassis is embedded in the lower end of the silo cylinder, a reduction motor 1 for driving the cantilevered discharge screw module is provided at the lower end of the rotating chassis, and a reduction motor 2 for driving the rotating chassis is also provided at the lower end of the silo cylinder, wherein the cantilevered discharge screw module comprises a discharge screw shaft, an eccentric turntable and a positioning bearing seat, The discharging screw shaft is embedded with multiple sets of cutting knife mechanisms. The discharging screw shaft is a segmented screw shaft. A capsule mounting groove is opened at the segment interface. Multiple sets of cutting knife mechanisms are distributed at both ends and the middle position of the discharging screw shaft. The cutting knife mechanism includes a push cylinder, a pitch shaft, a rotating motor, a cutting knife assembly and an annular positioning plate. The cutting knife mechanism is fixed to the inner wall of the discharging screw shaft through two high-strength flanges. The push cylinder is fixed in the high-strength flange. The outer side of the annular positioning plate is connected to the high-strength flange through an embedded ball. The cam is provided with a plurality of guide rods, and the guide rods are connected to the cam by a plurality of guide rods. One end of the pitch variable shaft is connected to the driving end of the rotating motor, and the other end thereof passes through the tool holder disc and the annular positioning disc in sequence. The end of the pitch variable shaft and the limiting groove are spline-matched. The groove width of the limiting groove is larger than the end diameter of the pitch variable shaft, and at least two key teeth extending in the axial direction are provided on the outer circumferential surface of the end of the pitch variable shaft. A key groove adapted to the key teeth is provided on the inner wall of the limiting groove. A conical boss with a diameter larger than that of its two ends is provided in the middle of the pitch variable shaft, and the conical boss abuts against the blade.

[0009] Furthermore, a motor seat is provided on the rotating motor, one end of the telescopic rod of the pushing cylinder is fixedly connected to the motor seat, and the fixed end of the pushing cylinder is fixed to the inner wall of the high-strength flange.

[0010] Furthermore, the positioning bearing seat is fixed to the upper end surface of the rotating chassis, one end of which is connected to the eccentric turntable through a pulley, one end of the discharging spiral shaft is connected to the eccentric turntable, and a protective cover is provided outside the positioning bearing seat.

[0011] Furthermore, the driving end of the reduction motor 1 is provided with a pulley 2, and the pulley 2 and the pulley 1 are connected by a synchronous belt. The synchronous belt passes through the rotating chassis, and a protective cover is provided on the synchronous belt.

[0012] Furthermore, the rotating chassis is located at the bottom of the silo cylinder, and includes a rotating seat, and a gear plate and a base are sequentially provided at the lower end of the rotating seat. A drop hole is provided among the rotating seat, the gear plate and the base, and a through groove for installing the synchronous belt is provided on one side of the drop hole. The drop pipe is fixed to the lower end of the base after corresponding to the drop hole.

[0013] Furthermore, an annular groove is provided on the edge of the rotating seat, and a sealing strip is provided in the annular groove. The sealing strip fits tightly with the outer edge of the discharge port at the bottom of the silo cylinder, and the discharge port at the bottom of the silo cylinder is embedded in the annular groove.

[0014] Furthermore, a driving gear is provided at the driving end of the second reduction motor, and the driving gear is rotatably connected to the bottom of the silo cylinder through a rotating shaft and is meshed with the gear plate.

[0015] 3.Beneficial effects:

[0016] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0017] The present invention adopts a bolt power cooperative structure of revolution and rotation to prevent materials from bridging in the bin; through the segmented spiral shaft and modular cutting knife mechanism, active anti-entanglement and efficient cutting of biomass materials are achieved, and parts replacement is convenient, maintenance time is reduced, and service life is increased.

[0018] The synergistic effect of the pushing cylinder and the pitch-variable shaft allows the blade to automatically extend or retract according to the material's entanglement status. The cooperation between the conical boss and the reset spring arm ensures precise pushing and resetting of the blade, avoiding the lag of traditional passive cutting. The spline-matched pitch-variable shaft and the annular positioning plate can synchronously transmit torque after the blade is extended, realizing high-speed rotary cutting, effectively solving the entanglement problem of high-fiber materials such as straw and film, and improving the material cutting rate.

[0019] It should be noted that the structures not introduced in the present invention are the same as those in the prior art or can be implemented by using the prior art, and are not described in detail here because they do not involve the design points and improvement directions of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partial structural cross-sectional view of the present invention;

[0022] Figure 3 It is a schematic diagram of the local structure of the present invention;

[0023] Figure 4 is a cross-sectional view of the cutting blade mechanism of the present invention;

[0024] Figure 5 This is a schematic diagram of the exploded structure of the cutting blade mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the partial structure of the cutting knife mechanism of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the reset spring arm of the present invention.

[0027] Reference numerals:

[0028] 1. Silo cylinder; 2. Rotating chassis; 21. Rotating seat; 211. Annular groove; 22. Gear plate; 23. Base; 24. Dropping port; 25. Through slot; 3. Dropping pipe; 4. Cantilever discharge screw module; 41. Discharge screw shaft; 42. Eccentric turntable; 43. Positioning bearing seat; 44. Cutting knife mechanism; 441. Push cylinder; 442. Pitch-variable shaft; 4421. Key teeth; 4422. Conical boss; 443. Rotating motor; 444. Cutting knife assembly; 4441. Knife Frame; 4442, blade; 44421, guide column; 4443, reset spring arm; 44431, rotary shaft; 44432, swing arm; 44433, sliding groove; 445, annular positioning plate; 4451, limit groove; 4452, keyway; 446, high-strength flange; 447, positioning rod; 448, motor seat; 45, pulley 1; 5, reduction motor 1; 51, pulley 2; 52, synchronous belt; 6, reduction motor 2; 61, drive gear; 7, feed hopper. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0032] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," "provided with," "provided on," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to mechanical connection or electrical connection; they may refer to direct connection or indirect connection through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] Refer to the attached Figure 1-7, the biomass power generation furnace front rotary unloading silo, including the silo cylinder 1, the rotating chassis 2, the drop pipe 3 and the feed hopper 7, the silo cylinder 1 is provided with a cantilever discharge screw module 4, the rotating chassis 2 is embedded in the lower end of the silo cylinder 1, the lower end of the rotating chassis 2 is provided with a reduction motor 5 for driving the cantilever discharge screw module 4, the lower end of the silo cylinder 1 is also provided with a reduction motor 6 for driving the rotating chassis 2, wherein the cantilever discharge screw module 4 includes a discharge screw shaft 41, an eccentric turntable 42 and a positioning bearing seat 43, the discharge screw shaft 41 is embedded with multiple groups of cutting knife mechanisms 44, the discharge screw shaft 41 is a segmented screw shaft, and the segmented connection A capsule installation groove is provided at the mouth, and multiple groups of cutting knife mechanisms 44 are distributed at both ends and the middle position of the discharging spiral shaft 41. The cutting knife mechanism 44 includes a pushing cylinder 441, a pitch-changing shaft 442, a rotating motor 443, a cutting knife assembly 444 and an annular positioning plate 445. The cutting knife mechanism 44 is fixed to the inner wall of the discharging spiral shaft 41 through two high-strength flanges 446. The pushing cylinder 441 is fixed in the high-strength flange 446. The outer side of the annular positioning plate 445 is rotatably connected to the high-strength flange 446 through embedded balls. The annular positioning plate 445 is provided with a limiting through groove 4451 corresponding to the end of the pitch-changing shaft 442.

[0034] In this embodiment, the unloading silo is mainly composed of a silo cylinder 1, a rotating chassis 2, a drop pipe 3 and a cantilevered discharge spiral module 4; wherein, the silo cylinder 1 is cylindrical, and a central feed hopper 7 is provided on the top for receiving biomass raw materials (such as bark, rice husks, straw, etc.), the rotating chassis 2 is nested in the bottom of the silo cylinder 1, and is sealed with the discharge port at the bottom of the silo cylinder 1 through an annular groove 211. The sealing strip in the annular groove 211 ensures that there is no leakage during the material transportation process, and the drop pipe 3 is vertically installed below the drop port 24 of the rotating chassis 2 to transport the material to the downstream equipment.

[0035] The eccentric turntable 42 and the positioning bearing seat 43 of the cantilevered discharging spiral module 4 are fixed to the upper end surface of the rotating chassis 2, and are driven to rotate by the reduction motor 5 through the synchronous belt 52. One end of the discharging spiral shaft 41 is connected to the eccentric turntable 42, and is driven by the eccentric turntable 42 to rotate. The centrifugal force generated when the eccentric turntable 42 rotates is used to form a certain amplitude of shaking to prevent the biomass raw material from winding around the discharging spiral shaft 41. At the same time, the reduction motor 5 drives the discharging spiral shaft 41 to rotate through the pulley 1 45, the pulley 2 51 and the synchronous belt 52, forming a composite motion of spiral pushing the material; the discharging spiral shaft 41 adopts a segmented structure, and a capsule mounting groove is opened at the segment interface. The whole is made of carbon fiber reinforced aluminum alloy. The segment interface adopts a 45° bevel transition design and a sealing ring is provided to prevent the material from penetrating into the shaft body, while reducing the risk of material adhesion. The capsule mounting groove area is provided with an annular reinforcement rib, and the cutting knife mechanism 44 is embedded and installed through the capsule mounting groove to ensure smooth and uniform material.

[0036] The cutting knife mechanism 44 is arranged at intervals along the two ends and the middle of the discharge spiral shaft 41, and is symmetrically distributed on the discharge spiral shaft 41 to ensure dynamic balance and avoid main shaft vibration; each group of mechanisms includes a push cylinder 441, a pitch-changing shaft 442, a rotating motor 443, a cutting knife assembly 444 and an annular positioning plate 445. The cutting knife mechanism 44 is fixed to the inner wall of the discharge spiral shaft 41 through two high-strength flanges 446. The inner wall of the high-strength flange 446 is provided with a groove for accommodating balls. The balls on the outer side of the annular positioning plate 445 enable it to rotate flexibly relative to the high-strength flange 446; the cutting knife mechanism as a whole is a capsule-type integrated structure through high The strength flange 446 is connected to the shaft to ensure axial strength. The cutting knife assembly 444 consists of a knife holder disc 4441 and multiple blades 4442. The blades 4442 are connected to the knife holder disc 4441 through a reset spring arm 4443. The reset spring arm 4443 includes a rotary shaft 44431 and a swing arm 44432. The rotary shaft 44431 is fixed to the knife holder disc 4441. The swing arm 44432 swings around the rotary shaft 44431. The sliding groove 44433 provided on the swing arm 44432 cooperates with the guide column 44421 on the blade 4442, so that the blade 4442 can be extended and retracted along the swing arm 44432. 45 is rigidly connected to the knife holder disc 4441 through multiple positioning rods 447 to ensure that the cutting knife assembly 444 and the annular positioning disc 445 rotate synchronously; when the material is detected to be entangled, the electronic control system starts the pushing cylinder 441, and its telescopic rod pushes the motor seat 448 and the rotating motor 443 to move forward, driving the pitch shaft 442 to move synchronously, and the conical boss 4422 in the middle of the pitch shaft 442 pushes the blade 4442, so that the blade 4442 overcomes the elastic force of the reset spring arm 4443 and extends to the outside of the discharge spiral shaft 41, and the key tooth 4421 at the end of the pitch shaft 442 and the key in the limiting groove 4451 of the annular positioning disc 445 are engaged. The slot 4452 is spline-engaged, and the rotary motor 443 drives the pitch-variable shaft 442 to rotate, which drives the annular positioning disk 445 and the cutting knife assembly 444 to rotate at high speed through the spline transmission to achieve cutting of the entangled material. After the cutting is completed, the pushing cylinder 441 retracts, and the conical boss 4422 in the middle of the pitch-variable shaft 442 exits the blade 4442 area. The blade 4442 retracts into the spiral shaft under the action of the reset spring arm 4443 to avoid affecting the normal material conveying. When the spiral rotates clockwise, the cutting knife rotates at high speed in the counterclockwise direction to form a shear force field, reduce the probability of material entanglement, and increase the cutting knife's resistance to spiral conveying.

[0037] Self-rotation drive: The reduction motor 5 drives the discharge screw shaft 41 to rotate through the pulley 2 51, the synchronous belt 52 and the pulley 1 45. The synchronous belt 52 passes through the through slot 25 of the rotating chassis 2 and is protected by a protective cover to prevent material from intrusion. The system adopts variable frequency speed regulation technology, which can dynamically adjust the screw speed according to the boiler load to ensure stable material conveying capacity.

[0038] Revolution drive: The driving gear 61 of the reduction motor 2 6 is engaged with the gear plate 22 of the rotating chassis 2, driving the rotating chassis 2 and the cantilever discharge spiral module 4 to revolve around the central axis of the silo as a whole. The revolution rate is lower than the rotation rate. The coordinated movement of revolution and rotation enables the spiral blades to continuously turn over the material while pushing the material, preventing bridging in the silo.

[0039] To sum up, when the biomass material enters the silo through the feed hopper 7 at the top of the silo cylinder 1, the discharge spiral shaft 41 pushes the material toward the drop pipe 3 under the combined motion of rotation and revolution. If it is detected that the spiral shaft is entangled by straw, film, etc. during the transportation process, the electronic control system immediately starts the cutting knife mechanism 44, and the push cylinder 441 pushes out the pitch shaft 442, so that the blade 4442 extends and positions, and the rotating motor 443 drives the blade 4442 to rotate at high speed to cut off the entangled material. After the cutting is completed, the blade 4442 automatically retracts, and the unloading silo resumes normal transportation. This structure is suitable for the continuous and stable transportation of high-fiber and easily entangled materials in biomass power plants, and effectively improves the reliability and automation level of the furnace feeding system.

[0040] The above-mentioned embodiments only express a certain implementation method of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. The self-rotating unloading bin in front of the biomass power generation furnace is characterized by: The invention comprises a silo barrel (1), a rotating chassis (2), a discharge pipe (3) and a feed hopper (7), wherein a cantilever discharge screw module (4) is provided in the silo barrel (1), the rotating chassis (2) is embedded in the lower end of the silo barrel (1), a reduction motor (5) for driving the cantilever discharge screw module (4) is provided at the lower end of the rotating chassis (2), and a reduction motor (6) for driving the rotating chassis (2) is also provided at the lower end of the silo barrel (1), wherein the cantilever discharge screw module (4) comprises a discharge screw shaft (41), an eccentric turntable (42) and a positioning bearing seat (43), a plurality of cutting knife mechanisms (44) are embedded in the discharge screw shaft (41), and the discharge screw shaft (41) The invention relates to a segmented spiral shaft, wherein a capsule mounting groove is provided at the segment interface, and a plurality of groups of cutting knife mechanisms (44) are distributed at both ends and the middle position of the discharge spiral shaft (41), wherein the cutting knife mechanism (44) comprises a push cylinder (441), a pitch-changing shaft (442), a rotary motor (443), a cutting knife assembly (444) and an annular positioning plate (445), wherein the cutting knife mechanism (44) is fixed to the inner wall of the discharge spiral shaft (41) through two high-strength flanges (446), wherein the push cylinder (441) is fixed in the high-strength flange (446), and the outer side of the annular positioning plate (445) is rotatably connected to the high-strength flange (446) through an embedded ball bearing, and the annular positioning plate (445) is fixed to the inner wall of the discharge spiral shaft (41) through two high-strength flanges (446). ) is provided with a limiting through groove (4451) corresponding to the end of the variable pitch shaft (442), the cutting knife assembly (444) includes a knife holder disc (4441), a plurality of blades (4442) are embedded in the knife holder disc (4441), a guide column (44421) is provided on the blade (4442), the blade (4442) is connected to the knife holder disc (4441) through a reset spring arm (4443), the reset spring arm (4443) includes a rotary shaft (44431) rotatably connected to the knife holder disc (4441), a swing arm (44432) is fixed on the rotary shaft (44431), a sliding groove (44433) is provided on the swing arm (44432), and the The guide column (44421) is slidably connected along the sliding groove (44433), one end of the annular positioning disk (445) is fixedly connected to the tool holder disk (4441) through a plurality of positioning rods (447), one end of the pitch-changing shaft (442) is connected to the driving end of the rotating motor (443), and the other end thereof passes through the tool holder disk (4441) and the annular positioning disk (445) in sequence, and a spline fit is formed between the end of the pitch-changing shaft (442) and the limiting groove (4451), the groove width of the limiting groove (4451) is larger than the end diameter of the pitch-changing shaft (442), and at least two key teeth (4421) extending in the axial direction are provided on the outer circumferential surface of the end of the pitch-changing shaft (442).A keyway (4452) adapted to the key teeth (4421) is provided on the inner wall of the limiting groove (4451), and a conical boss (4422) having a diameter larger than that of the two ends of the variable pitch shaft (442) is provided in the middle portion of the variable pitch shaft (442), and the conical boss (4422) and the blade (4442) abut against each other.

2. The biomass power generation furnace front rotary unloading bin according to claim 1 is characterized by: The rotating motor (443) is provided with a motor seat (448), one end of the telescopic rod of the pushing cylinder (441) is fixedly connected to the motor seat (448), and the fixed end of the pushing cylinder (441) is fixed to the inner wall of the high-strength flange (446).

3. The biomass power generation furnace front rotary unloading bin according to claim 1 is characterized by: The positioning bearing seat (43) is fixed to the upper end surface of the rotating chassis (2), one end of which is connected to the eccentric turntable (42) through a pulley (45), one end of the discharging screw shaft (41) is connected to the eccentric turntable (42), and a protective cover is provided outside the positioning bearing seat (43).

4. The biomass power generation furnace front rotary unloading bin according to claim 3 is characterized by: The driving end of the reduction motor 1 (5) is provided with a pulley 2 (51), and the pulley 2 (51) and the pulley 1 (45) are connected via a synchronous belt (52), and the synchronous belt (52) passes through the rotating chassis (2), and a protective cover is provided on the synchronous belt (52).

5. The biomass power generation furnace front rotary unloading bin according to claim 4 is characterized by: The rotating chassis (2) is located at the bottom of the silo cylinder (1), and includes a rotating base (21). A gear plate (22) and a base (23) are sequentially provided at the lower end of the rotating base (21). A blanking port (24) is provided in the middle of the rotating base (21), the gear plate (22) and the base (23), and passes through the blanking port (24). A through groove (25) for installing the synchronous belt (52) is provided on one side of the blanking port (24). The blanking pipe (3) is fixed to the lower end of the base (23) after corresponding to the blanking port (24).

6. The biomass power generation furnace front rotary unloading bin according to claim 5, characterized in that: An annular groove (211) is provided on the edge of the rotating seat (21), a sealing strip is provided in the annular groove (211), the sealing strip is tightly fitted to the outer edge of the discharge port at the bottom of the silo cylinder (1), and the discharge port at the bottom of the silo cylinder (1) is embedded in the annular groove (211).

7. The biomass power generation furnace front rotary unloading bin according to claim 6, characterized in that: The driving end of the second reduction motor (6) is provided with a driving gear (61), and the driving gear (61) is rotatably connected to the bottom of the silo cylinder (1) through a rotating shaft and is meshed with the gear plate (22).

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