Biomass power generation furnace front anti-winding floating cantilever double-helix material taking device

Abstract

The present application provides a kind of biomass power generation furnace front anti-winding floating cantilever double screw material taking device, including receiving bin, screw shaft drive module, pitch adjusting module, anti-winding auxiliary structure, screw shaft drive module and anti-winding auxiliary structure are mirror image and are provided with two groups, anti-winding auxiliary structure and pitch adjusting module are respectively arranged in the upper and lower ends of screw shaft drive module.The beneficial effects of the present application are: through the floating adjustable pitch double screw structure, the loose rake of intermittent swing feeding port is matched, the conveying design of variable diameter and pitch screw shaft is matched, the three-dimensional anti-winding synergistic effect of material loosening, material taking and pitch adjusting is realized, the material accumulation can be effectively dispersed, the wound material is loosened, the probability of material blockage is greatly reduced, the material winding problem is solved from the root, the equipment operation stability and material taking efficiency are greatly improved, and the working condition requirement of uninterrupted material taking in front of biomass power generation furnace is adapted.

Description

Technical Field

[0001] This invention mainly relates to the field of biomass power generation equipment technology, specifically to a floating cantilever double-helix material handling device for preventing entanglement in front of a biomass power generation furnace. Background Technology

[0002] Biomass power generation, as an important form of clean energy utilization, relies heavily on the pre-furnace biomass material handling process to ensure the continuous and stable operation of the power generation system. The handling of flexible biomass materials such as straw and rice husks is often accomplished using a double-helix material handling device. This type of device is typically used in conjunction with a receiving hopper below the silo, relying on the rotation of the double helix shaft to achieve quantitative material conveying. Due to its stable material handling rate and good conveying continuity, it has become the mainstream equipment for pre-furnace material handling in biomass power generation. Its core structure mainly consists of a receiving hopper, a double helix shaft drive mechanism, and a conveying chamber. The drive mechanism drives the double helix shaft to rotate synchronously, pushing the material in the receiving hopper to the furnace feed inlet.

[0003] In practical applications, existing double-helix feeding devices for biomass furnaces are prone to material entanglement on the helical shaft due to the flexible fiber characteristics of materials such as straw. Most existing devices use a fixed spacing design for the double helical shafts, making it impossible to adjust the spacing according to the material entanglement status. They can only passively protect themselves by adding fixed cutters and anti-entanglement baffles, lacking effective handling capabilities for already formed material entanglement. This easily leads to helical shaft jamming and reduced feeding efficiency. Furthermore, existing devices rely heavily on manual observation for material entanglement detection, lacking real-time automated detection methods. This makes it difficult to address entanglement in its early stages, potentially exacerbating the problem and even causing overload damage to the drive mechanism, thus affecting the continuity of feeding operations in front of the biomass power plant furnace. Summary of the Invention

[0004] 1. The technical problem that the invention aims to solve: This invention provides a floating cantilever double-helix material handling device for preventing entanglement in front of a biomass power generation furnace, in order to solve the technical problems existing in the background art.

[0005] 2. Technical Solution: To achieve the above objectives, the technical solution provided by the present invention is as follows: a floating cantilever double helix material handling device for anti-winding in front of a biomass power generation furnace, comprising a receiving bin, a helical shaft drive module, a spacing adjustment module, and an anti-winding auxiliary structure. The helical shaft drive module and the anti-winding auxiliary structure are each arranged in two sets in a mirror image. The anti-winding auxiliary structure and the spacing adjustment module are respectively disposed at the upper and lower ends of the helical shaft drive module. The helical shaft drive module includes a cam divider, a helical shaft, a drive motor, and a torque sensor. The cam divider is an arc-shaped cam indexing mechanism with a horizontal through-type input shaft that extends out of the housing at both ends. The drive motor is driven to one end of the extended section of the input shaft, and the helical shaft is driven to the other end of the extended section of the input shaft. The torque sensor is located at the connection end between the helical shaft and the cam divider. The pitch adjustment module includes a planetary roller screw mechanism, an adjustment motor, a position sensor, and a locking mechanism. The position sensor and the locking mechanism are respectively arranged in correspondence with the helical shaft drive module. The planetary roller screw mechanism includes a positioning base, a bidirectional screw, two planetary roller nuts, and a slide. One side of the planetary roller nut is fixedly connected to the slide. The position sensor and the locking mechanism are respectively fixed on the two sides of the slide. The drive end of the adjustment motor is connected to one end of the bidirectional screw. The anti-winding auxiliary structure includes a loosening rake and a cam disk. One end of the loosening rake is fixed to the upper end of the cam divider by a positioning rod, and the other end of the loosening rake extends in the direction of the spiral shaft. The cam disk is connected to one end of the output shaft of the cam divider.

[0006] Furthermore, the slide block is threadedly connected to the bidirectional lead screw, and the position sensor is fixed inside the slide block, with its sensing end aligned with the moving direction of the slide block.

[0007] Furthermore, the lower end of the cam divider is fixedly connected to the slide block, and a buffer is provided between the two cam dividers. The buffer is fixedly connected to the positioning base through a positioning post.

[0008] Furthermore, the locking mechanism includes a pushing cylinder and a clamping lever. The cylinder body of the pushing cylinder is fixedly installed on the side wall of the slide. The upper end of the clamping lever is hinged to the bottom end face of the slide via a pin to form a lever fulcrum. One side of the clamping lever is hinged to the piston rod of the pushing cylinder. The side of the clamping lever facing the side plate of the positioning base is provided with a continuous sawtooth-shaped clamping surface. The toothed clamping surface is arranged opposite to the two side walls of the side plate of the positioning base.

[0009] Furthermore, the lower end of the positioning rod is fixedly connected to the upper end face of the cam divider via a mounting base, and a return spring is also provided on one side of the positioning rod. The loosening rake is rotatably connected to the positioning rod.

[0010] Furthermore, the loosening rake is located on one side of the cam disk, and the end of the loosening rake near the cam disk is spherical. The two ends of the return spring are fixedly connected to the loosening rake and the mounting base, respectively.

[0011] Furthermore, one end of the spiral shaft is connected to the extended section of the input shaft of the cam divider via a coupling. The spiral shaft has variable diameter spiral blades. The variable diameter spiral blades have a small pitch and a large diameter at the end near the cam divider, and a large pitch and a small diameter at the end away from the cam divider, which is used to enhance the material handling capacity and reduce entanglement.

[0012] Furthermore, the receiving hopper includes an equipment chamber and a material taking chamber. The material taking chamber has an inlet on its upper end face and an outlet on its lower end face near the end of the screw shaft. The loosening rake is located at the inlet.

[0013] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: By combining a floating adjustable pitch double helix structure with an intermittently oscillating loosening rake at the feed inlet, and a conveying design with a variable diameter and variable pitch screw shaft, a three-dimensional anti-entanglement function is achieved, which can effectively disperse material accumulation and loosen entangled materials, greatly reducing the probability of material jamming. This solves the problem of material entanglement from the root, improves the stability of equipment operation and material handling efficiency, and is suitable for the working conditions of uninterrupted material handling in front of biomass power generation furnaces. The distance between the double helix shafts is infinitely adjustable, and the speed of both the drive motor and the regulating motor can be precisely adjusted. It can adapt to the feeding needs of different types of biomass materials with different moisture contents, such as straw, rice husks, and sawdust, and has a wide range of applications. The core transmission component is a through-type input shaft cam divider. It uses a single input shaft to simultaneously achieve continuous material feeding drive of the screw shaft and intermittent loosening drive of the loosening rake. There is no need to configure a separate power source for the loosening rake, which simplifies the overall structure of the equipment, improves the structural integration, reduces transmission failure points, and the integrated transmission design reduces the manufacturing cost and subsequent maintenance cost of the equipment. By utilizing the real-time detection function of a non-contact torque sensor, combined with the automated action of the spacing adjustment module, active adjustment and closed-loop control of anti-winding are achieved. It can quickly identify and trigger actions such as spacing adjustment and reverse loosening of the spiral shaft in the early stage of material entanglement. Compared with the traditional passive anti-winding structure, the anti-winding response is more timely and the processing is more efficient.

[0014] It should be noted that the structures not described in this invention are not related to the design points and improvement directions of this invention, and are the same as or can be implemented using existing technologies, so they will not be elaborated here. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle; Figure 3This is a partial structural diagram of the present invention; Figure 4 This is another partial structural schematic diagram of the present invention; Figure 5 This is another partial structural schematic diagram of the present invention.

[0016] Figure label: 1. Receiving bin; 101. Equipment cavity; 102. Picking cavity; 103. Feed inlet; 104. Discharge outlet; 2. Screw shaft drive module; 201. Cam divider; 202. Screw shaft; 203. Drive motor; 204. Torque sensor; 205. Coupling; 3. Spacing adjustment module; 301. Planetary roller screw mechanism; 3011. Positioning base; 3012. Bidirectional screw; 3013. Planetary roller nut; 3014. Slide; 302. Adjusting motor; 303. Position sensor; 304. Locking mechanism; 3041. Push cylinder; 3042. Clamping lever; 305. Buffer; 4. Anti-winding auxiliary structure; 401. Loosening rake; 402. Cam plate; 403. Positioning rod; 404. Mounting base; 405. Return spring. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0018] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0019] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] See attached document Figure 1-5 The present invention relates to a floating cantilever double-helix feeding device for biomass power generation furnaces, which is installed below the feed hopper in front of the biomass power generation furnace. It is used to quantitatively transport biomass materials such as straw from the feed hopper to the furnace feed inlet. The core components of the device include: a receiving hopper 1, two sets of mirror-symmetrically arranged spiral shaft drive modules 2, a spacing adjustment module 3, and two sets of anti-winding auxiliary structures 4 corresponding one-to-one with the spiral shaft drive modules. The spiral shaft drive modules 2 are installed inside the equipment cavity 101 of the receiving hopper 1, with their spiral shafts 202 extending into the feeding cavity 102 of the receiving hopper 1 to collect materials. The spacing adjustment module 3 is located below the two sets of spiral shaft drive modules 2, used to drive the two modules to perform relative or opposite linear movements, thereby adjusting the spacing of the double spiral shafts. The anti-winding auxiliary structures 4 are located above the spiral shaft drive modules 2, at the feed inlet 103 of the receiving hopper 1, used to loosen the material at the feed inlet, preventing entanglement at the source.

[0022] The receiving hopper 1 is divided into two parts: the equipment chamber 101 and the receiving chamber 102. The equipment chamber 101 is used to accommodate the drive parts of the spacing adjustment module 3 and the screw shaft drive module 2. The receiving chamber 102 is used to receive the biomass material falling from the hopper. A linkage moving groove is provided at the connection between the equipment chamber 101 and the receiving chamber 102. The groove extends along the moving direction of the slide 3014. The length of the groove is adapted to the maximum adjustment stroke of the double screw shaft 202, and the width is adapted to the radial dimension of the screw shaft 202 and the swing range of the loosening rake 401. This provides sufficient movement space for the linear movement of the screw shaft 202, the swing of the loosening rake 401, and the synchronous overall movement with the screw shaft drive module 2, ensuring that the two types of components move without jamming or interference during the entire stroke. The upper end of the receiving chamber 102 is provided with an inlet 103 that connects with the discharge port of the biomass hopper, allowing the screw shaft 202 to pass through. The material is extracted into the feeding chamber 102 through the trough. A discharge port 104 is provided on the lower end face of the feeding chamber 102, away from the cam divider 201. A guide plate is provided at the discharge port 104 to smoothly transport the extracted biomass material to the furnace feed inlet. A removable sealing cover is provided on the top of the receiving hopper 1. The cover is fixed to the housing of the receiving hopper 1 with bolts. An inspection port and observation window are provided on the cover for easy daily maintenance and observation of the equipment's operating status. Multiple adjustable support feet are provided at the bottom of the receiving hopper 1 to adjust the equipment's level, ensuring stability during operation and reducing vibration and noise. Flexible dustproof baffles are provided at the interface between the moving trough, the screw shaft 202, and the loosening rake 401 to prevent biomass powder from entering the equipment chamber 101 from the feeding chamber 102, and to avoid powder adhering to the guide rails, lead screws, and other transmission components, affecting the equipment's accuracy.

[0023] Two sets of spiral shaft drive modules 2 are arranged in a mirror-symmetrical manner. Each module is an independent material handling drive unit. The core structure includes a cam divider 201, a spiral shaft 202, a drive motor 203, a torque sensor 204, and a coupling 205. The cam divider 201 adopts an arc-shaped cam indexing mechanism with a through-type input shaft. The lower end of the housing of the cam divider 201 is fixedly connected to the upper surface of the slide 3014 of the spacing adjustment module 3 through flange bolts. The slide moves synchronously in a straight line along the positioning base 3011 to realize the overall movement of the module. The drive motor 203 is a servo drive motor, which is fixed to the side of the housing of the cam divider 201 through the motor mounting bracket. Its output shaft is connected to the input shaft of the cam divider 201 through a flexible coupling, providing continuous rotational power input to the cam divider 201. The speed can be precisely adjusted by the control system to adapt to the material handling rate of different materials. The spiral shaft 202 has a cantilever structure. One end is coaxially connected to the extension section of the input shaft of the cam divider 201. Its length extending into the material picking chamber 102 is adapted to the depth of the material picking chamber. The spiral shaft 202 is integrally machined with variable diameter and variable pitch spiral blades. The spiral blades are closer to the cam divider 201 with a small pitch and a large diameter, which can initially gather the material and prevent the material from leaking from the shaft root. The spiral blades are further away from the cam divider 201 with a large pitch and a small diameter, which can speed up the material conveying rate and realize the gradual compression conveying of the material. This structure not only avoids the material from accumulating and tangling at the root of the spiral shaft, but also enhances the stability of material picking and continuous conveying force. A cam disk 402 is coaxially fixed to the output shaft end of the cam divider 201. The drive motor 203 is driven to the right end extension of the input shaft of the cam divider 201, and the screw shaft 202 is driven to the left end extension of the input shaft. The drive motor 203 drives the input shaft to rotate continuously, directly driving the screw shaft 202 to continuously pick up materials. At the same time, the conjugate cam on the input shaft drives the output turret to rotate intermittently, which in turn drives the cam disk 402 at the output shaft end to swing intermittently. The through-type input shaft arc surface cam divider used in this embodiment is an industrial standard product. Its input shaft is a through shaft machined as a whole. The mechanical strength and coaxiality of the two end extensions are completely consistent. It can simultaneously withstand the input torque of the drive motor and the load torque of the screw shaft. The symmetrical structure of the input shaft makes the equipment more evenly stressed. At the same time, the internal transmission of the cam divider is converted into the intermittent power of the loosening rake, realizing the efficient linkage between picking up materials and loosening. The torque sensor 204 is a non-contact torque sensor, which is sleeved on the connection section between the input shaft of the cam divider 201 and the screw shaft 202. It can detect the output torque of the screw shaft 202 in real time without loss. When the torque exceeds the preset threshold, it is immediately determined that the material is entangled and an electrical signal is sent to the control system to trigger the spacing adjustment program.

[0024] The spacing adjustment module 3 is located below the two sets of screw shaft drive modules 2 and at the bottom of the equipment cavity 101 of the receiving bin 1. The core structure includes a planetary roller screw mechanism 301, an adjustment motor 302, a position sensor 303, a locking mechanism 304, and a buffer 305. The planetary roller screw mechanism 301 is a power transmission component with adjustable pitch, featuring high transmission accuracy and strong load-bearing capacity, suitable for heavy-duty working conditions in biomass harvesting. It includes a positioning base 3011, a bidirectional screw 3012, two planetary roller nuts 3013, and a slide block 3014. The positioning base 3011 is fixedly installed at the bottom of the equipment cavity 101 of the receiving bin 1 using expansion bolts. Two heavy-duty linear guides are parallel along the length of the base, providing precise sliding guidance for the slide block 3014. The bidirectional screw 3012 is horizontally rotatably installed between the guides of the positioning base 3011. The screw has left-hand and right-hand precision threads machined at both ends, forming a bidirectional synchronous transmission structure. One end of the bidirectional screw 3012 is connected to the output shaft of the adjusting motor 302 via a coupling, while the other end is hinged to the positioning base 3011 via a deep groove ball bearing. Driven by the adjusting motor 302, it rotates forward or backward, enabling the two slide blocks 3014 to rotate. The two planetary roller nuts 3013 are respectively engaged with the left-hand and right-hand threads of the double-axis screw 3012. The side of each planetary roller nut 3013 is fixedly connected to a slide block 3014 by bolts. The bottom of the slide block 3014 is machined with a groove that matches the linear guide rail. Through the sliding groove, it slides with the linear guide rail of the positioning base 3011, and can make a backlash-free linear reciprocating motion along the axis of the double-axis screw 3012. When the double-axis screw 3012 rotates forward, the two planetary roller nuts 3013 drive the two slide blocks 3014 to move synchronously in opposite directions under the action of the left-hand and right-hand threads, increasing the distance between the two sets of helical shaft drive modules 2. When the double-axis screw 3012 rotates in reverse, the two slide blocks 3014 move synchronously in opposite directions, reducing the module distance and realizing the stepless adjustment of the distance between the double helical shafts. The adjustment stroke is limited by the length of the positioning base and the size of the groove. The position sensor 303 is a laser displacement sensor, which corresponds one-to-one with the slide 3014. It is fixedly installed on the inner end face of the slide through the sensor bracket. The sensing end is arranged horizontally along the moving direction of the slide 3014. It detects the relative distance between the two slides in real time and feeds the distance signal back to the control system in real time to realize precise closed-loop control of the spacing and ensure the consistency of the double helix shaft spacing adjustment. The buffer 305 is a hydraulic buffer, which is fixedly installed in the middle of the positioning base 3011 by the positioning column and the mounting plate, and is located between the opposing end faces of the two cam dividers 201. When the two slides 3014 move towards each other to the minimum distance, the buffer rod of the buffer 305 contacts the housing end face of the cam divider 201, providing flexible buffer limit for the cam divider 201, avoiding rigid collision between the two modules, and accurately limiting the minimum working distance of the double helical shaft, effectively protecting the transmission components of the equipment. The locking mechanism 304 corresponds one-to-one with the slide 3014, and is used to reliably lock the slide 3014 after the spacing adjustment is completed, to prevent the slide from shifting due to equipment vibration during material handling, and to ensure the stability of the double helix shaft spacing. The structure includes a push cylinder 3041 and a clamping lever 3042. The push cylinder 3041 is a double-acting pneumatic cylinder, and its cylinder body is fixedly installed on the outer wall of the slide 3014 through a cylinder mounting seat. The upper end of the clamping lever 3042 is hinged to the bottom end face of the slide 3014 through a pin and a bushing, forming a lever fulcrum that can rotate flexibly. The lower end of the clamping lever is hinged to the piston rod of the push cylinder 3041 through a fisheye joint, realizing flexible transmission between the cylinder power and the lever. The clamping lever 3042 faces the side plate of the positioning base 3011. The slide 3014 is machined with a continuously serrated clamping surface, which is arranged opposite to the outer wall of the side plate of the positioning base. The serrations adopt an oblique tooth structure, which can further increase the friction during locking and prevent the slide 3014 from slipping. When the spacing is adjusted to the correct position, the control system controls the piston rod of the push cylinder 3041 to extend, pushing the clamping lever 3042 to rotate around the hinge fulcrum, so that the serrated clamping surface tightly presses against the side wall of the side plate of the positioning base 3011. The lever principle is used to amplify the thrust of the cylinder and realize the reliable locking of the slide 3014. When the spacing needs to be adjusted, the piston rod of the cylinder retracts, driving the clamping lever 3042 to rotate in the opposite direction around the hinge fulcrum. The serrated clamping surface separates from the side plate of the positioning base 3011, releasing the locking of the slide 3014, and the slide 3014 can slide freely along the linear guide rail.

[0025] Two sets of anti-entanglement auxiliary structures 4 correspond one-to-one with two sets of spiral shaft drive modules 2, and are set at the upper end of the cam divider 201 and at the feed inlet 103 of the receiving bin 1. They move synchronously with the cam divider 201. The core structure includes a loosening rake 401, a cam disc 402, a positioning rod 403, a mounting base 404, and a return spring 405. It can loosen the material at the feed inlet in real time, preventing material accumulation and entanglement from the source. The mounting base 404 adopts a steel block structure and is fixedly installed on the upper end face of the cam divider 201 by bolts. The positioning rod 403 is vertically welded and fixed to the upper surface of the mounting base, providing stable installation for the loosening rake. Rotary support; the rake body of the loosening rake 401 is hinged to the upper end of the positioning rod 403 via a rotating shaft and a copper sleeve, allowing it to swing slightly around the rotating shaft. The working end of the loosening rake 401 extends towards the spiral shaft 202 and passes through the linkage moving groove of the receiving bin 1 to reach the feed inlet 103. Multiple conical rake teeth are evenly arranged on the working end, with a safety gap reserved between the rake teeth and the spiral blades. This allows for the sorting and dispersing of tangled materials without interfering with the rotational movement of the spiral shaft. The power end of the loosening rake 401 faces the cam disk 402, and its end is machined into a smooth spherical structure, making rolling contact with the cam profile surface of the cam disk 402, reducing the contact between the cam disk 402 and the loosening rake 401. Wear between the loosening rakes 401; the return spring 405 is a stainless steel cylindrical helical tension spring, one end of which is hooked to the hook hole of the power end of the loosening rake 401, and the other end is hooked to the hook post of the mounting base 404, providing continuous return tension for the loosening rake 401, ensuring that the spherical power end of the loosening rake 401 is always in close contact with the contour surface of the cam disk 402 without any gaps; the cam disk 402 adopts an eccentric cam structure, which is coaxially fixed to the end of the output shaft of the cam divider 201 away from the helical shaft 202 by a flat key and the expansion sleeve, and rotates intermittently in sync with the output shaft, and the curvature of its cam contour surface is adapted to the swing angle of the loosening rake 401. When the output shaft of the cam divider 201 rotates intermittently with the drive motor 203, the cam disk 402 rotates intermittently in sync. When the protruding part of the cam disk 402 rotates to contact the spherical end of the loosening rake 401, it squeezes the loosening rake 401 to swing around the positioning rod 403 toward the material picking chamber. The rake teeth loosen and disperse the material accumulated at the feed inlet 103. After the protruding part of the cam disk 402 has rotated, under the pulling force of the return spring 405, the loosening rake 401 quickly returns to the initial position. This cycle repeats to achieve continuous loosening of the material at the feed inlet, effectively preventing the material from clumping together and entangled with the spiral shaft 202 at the feed inlet.

[0026] In this embodiment, all actions of the device are centrally controlled by a PLC control system. The workflow is divided into three stages: normal material handling, winding detection and adjustment, and material handling recovery. The entire process is automated and requires no manual intervention, making it suitable for the unmanned production requirements of modern biomass power generation furnaces. The specific workflow is as follows: Normal material handling stage: The drive motor 203 drives the input shaft of the cam divider 201 to rotate continuously at a preset speed, which drives the screw shaft 202 to rotate and converts the continuous rotational motion into the intermittent rotational motion of the output shaft. The output shaft drives the cam disk 402 to rotate synchronously and intermittently. The screw shaft 202 gradually gathers and transports the biomass material at the feed inlet 103 through the rotation of the variable diameter and variable pitch blades. The material moves along the screw blades to the discharge outlet 104 and is finally smoothly transported to the furnace feed inlet through the discharge outlet 104 to complete the quantitative material handling. The cam disk 402 rotates synchronously and intermittently with the output shaft, continuously driving the loosening rake 401 to reciprocate and oscillate, loosening and dispersing the material at the feed inlet 103 in real time to prevent the material from accumulating and clumping. The torque sensor 204 detects the working torque of the screw shaft 202 in real time, and the position sensor 303 monitors the distance between the slide blocks 3014 in real time.

[0027] Winding detection and adjustment stage: When the torque sensor 204 detects that the torque of the spiral shaft 202 exceeds the preset alarm threshold, it immediately sends a winding detection signal to the control system. The control system responds quickly and triggers the automatic anti-winding adjustment program. First, the locking mechanism 304 is activated, pushing the piston rod of the cylinder 3041 to retract, causing the clamping lever 3042 to rotate around the fulcrum. The toothed clamping surface separates from the side plate of the positioning base, releasing the locking state of the slide 3014. Then, the adjusting motor 302 rotates forward at the preset speed, driving the bidirectional lead screw 3012 to rotate forward. The two slides 3014 drive the two sets of spiral shaft drive modules 2 to move synchronously in opposite directions along the linear guide rail. The distance between the two spiral shafts quickly increases to 1.5-2 times the normal working distance, and the spiral shaft 202 and the sparse The loosening rake 401 moves linearly along the linkage moving trough of the receiving bin without any motion interference; the position sensor 303 provides real-time feedback on the spacing of the slide block 3014, and when the preset adjustment spacing is reached, the adjusting motor 302 stops and engages the brake; as the spacing increases, the distance between the two spiral shafts 202 is rapidly increased, and the material wrapped around the spiral shafts 202 is naturally loosened due to the loss of clamping force; at the same time, the drive motor 203 slows down and rotates in the opposite direction, driving the spiral shafts 202 to rotate in the opposite direction at a low speed, further tearing and loosening the wrapped material; the loosening rake 401 of the anti-winding auxiliary structure 4 maintains normal swinging, combing the loosened material and thoroughly removing the wrapped material on the spiral shaft; during this process, the torque sensor 204 continuously detects the torque value of the spiral shafts 202.

[0028] Material recovery phase: When torque sensor 204 detects that the torque of the spiral shaft 202 has returned to the normal working range, it is determined that the winding removal is complete, and the material recovery program resumes; the regulating motor 302 reverses at the preset speed, driving the bidirectional lead screw 3012 to reverse, causing the two slides 3014 to move synchronously in opposite directions along the linear guide rail, accurately restoring the distance between the double spiral shafts to the preset normal working distance. After the position sensor 303 feedbacks that it is in place, the regulating motor 302 stops and engages the brake; after receiving the locking signal, the locking mechanism 304 pushes the cylinder 30 41. The piston rod extends, pushing the clamping lever 3042 to press the side plate of the positioning base 3011, and re-completes the reliable locking of the slide 3014; the drive motor 203 returns to the preset normal material feeding speed, and the cam divider 201 drives the spiral shaft 202 and cam disk 402 to resume normal intermittent material feeding and loose oscillation. The device returns to the normal material feeding stage and continues to complete the continuous material feeding operation of biomass materials in front of the furnace; if the torque does not return to normal after a single adjustment, the spacing can be increased again until the torque returns to normal, ensuring that the entangled material is completely removed.

[0029] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A floating cantilever double-helix material handling device for preventing entanglement in front of a biomass power generation furnace, characterized in that: It includes a receiving bin (1), a spiral shaft drive module (2), a spacing adjustment module (3), and an anti-winding auxiliary structure (4). The spiral shaft drive module (2) and the anti-winding auxiliary structure (4) are both mirrored in two sets. The anti-winding auxiliary structure (4) and the spacing adjustment module (3) are respectively located at the upper and lower ends of the spiral shaft drive module (2). The spiral shaft drive module (2) includes a cam divider (201), a spiral shaft (202), a drive motor (203), and a torque sensor (204). The cam divider (201) is an arc-shaped cam indexing mechanism with a horizontal through-type input shaft that extends out of the housing at both ends. The drive motor (203) is driven to one end of the input shaft, and the spiral shaft (202) is driven to the other end of the input shaft. The torque sensor (204) is located at the connection end between the spiral shaft (202) and the cam divider (201). The pitch adjustment module (3) includes a planetary roller screw mechanism (301), an adjustment motor (302), a position sensor (303), and a locking mechanism (304). The position sensor (303) and the locking mechanism (304) are respectively arranged in correspondence with the screw shaft drive module (2). The planetary roller screw mechanism (301) includes a positioning base (3011), a bidirectional screw (3012), two planetary roller nuts (3013), and two slides (3014). One side of the planetary roller nut (3013) is fixedly connected to the slide (3014). The position sensor (303) and the locking mechanism (304) are respectively fixed on the two sides of the slide (3014). The driving end of the adjustment motor (302) is connected to one end of the bidirectional screw (3012). The anti-winding auxiliary structure (4) includes a loosening rake (401) and a cam disk (402). One end of the loosening rake (401) is fixed to the upper end of the cam divider (201) by a positioning rod (403). The other end of the loosening rake (401) extends toward the spiral shaft (202). The cam disk (402) is connected to one end of the output shaft of the cam divider (201). The lower end of the positioning rod (403) is connected to the cam divider via a mounting base (404). The upper end face of the cutter (201) is fixedly connected, and a return spring (405) is provided on one side of the positioning rod (403). The loosening rake (401) is rotatably connected to the positioning rod (403). The loosening rake (401) is located on one side of the cam disk (402). The end of the loosening rake (401) near the cam disk (402) is spherical. The two ends of the return spring (405) are fixedly connected to the loosening rake (401) and the mounting base (404) respectively.

2. The anti-entanglement floating cantilever double-helix material handling device for biomass power generation furnaces according to claim 1, characterized in that: The slide block (3014) is threadedly connected to the bidirectional lead screw (3012), and the position sensor (303) is fixed inside the slide block (3014), with its sensing end aligned with the moving direction of the slide block (3014).

3. The anti-entanglement floating cantilever double-helix material handling device for biomass power generation furnaces according to claim 1, characterized in that: The lower end of the cam divider (201) is fixedly connected to the slide (3014), and a buffer (305) is provided between the two cam dividers (201). The buffer (305) is fixedly connected to the positioning base (3011) through a positioning post.

4. The anti-entanglement floating cantilever double-helix material handling device for biomass power generation furnaces according to claim 1, characterized in that: The locking mechanism (304) includes a push cylinder (3041) and a clamping lever (3042). The cylinder body of the push cylinder (3041) is fixedly installed on the side wall of the slide (3014). The upper end of the clamping lever (3042) is hinged to the bottom end face of the slide (3014) by a pin to form a lever fulcrum. One side of the clamping lever (3042) is hinged to the piston rod of the push cylinder (3041). The clamping lever (3042) has a continuous sawtooth clamping surface on the side facing the side plate of the positioning base (3011). The toothed clamping surface is arranged opposite to the two side walls of the side plate of the positioning base (3011).

5. The anti-entanglement floating cantilever double-helix material handling device for biomass power generation furnaces according to claim 1, characterized in that: One end of the spiral shaft (202) is connected to the extended end of the input shaft of the cam divider (201) via a coupling (205). The spiral shaft (202) has variable diameter spiral blades. The variable diameter spiral blades have a small pitch and a large diameter at the end near the cam divider (201), and a large pitch and a small diameter at the end away from the cam divider (201), which is used to enhance the material handling capacity and reduce entanglement.

6. The anti-entanglement floating cantilever double-helix material handling device for biomass power generation furnaces according to claim 1, characterized in that: The receiving hopper (1) includes a device chamber (101) and a material taking chamber (102). The material taking chamber (102) has an inlet (103) on its upper end face and an outlet (104) on its lower end face near the end of the screw shaft (202). The loosening rake (401) is located at the inlet (103).

Images