Anti-coking dredging mechanism of boiler return feeder

Abstract

The invention discloses an anti-coking dredging mechanism for a boiler return feeder, and belongs to the technical field of boiler return feeders, the anti-coking dredging mechanism comprises a boiler body, one side of the boiler body is provided with a support frame, the support frame is provided with a cyclone separator, the support frame is internally provided with a return feeder body, and the lower part of the return feeder body is fixedly connected with a knocking device. In the return feeder, the circular plate slides backwards and drives the sliding rod and the knocking hammer to quickly reset in the opposite direction, finally, the knocking hammer impacts and knocks the bearing plate, periodic vibration can be applied to the return feeder body through the action, and initial coke or attached particles which are not firm inside are effectively promoted to fall to the bottom of the return feeder from the inner wall or a structure dead angle through vibration; in addition, after the boiler stops running, the handle can be manually pulled to drive the baffle to move in the direction away from the sliding frame, then the discharging port in the closed state is released, residual materials or coke blocks at the bottom of the return feeder are rapidly cleaned, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler returners, and in particular relates to an anti-coking dredging mechanism for a boiler returner. Background Art

[0002] The boiler return feeder is a key device installed in a circulating fluidized bed boiler. It is mainly used to transport high-temperature solid particles (such as bed materials and fuel residues) separated from the furnace back to the furnace to achieve material recycling. Its working principle relies on the particles after gas-solid separation to flow back to the combustion zone through the return channel under the action of gravity or pneumatic force, thereby maintaining the high-temperature stable state and efficient combustion process in the boiler. The return feeder usually has the characteristics of high temperature resistance, wear resistance and strong sealing. It is an important component of the circulating fluidized bed boiler to achieve energy saving, efficient combustion and environmentally friendly emissions.

[0003] Prior art has disclosed several invention patents in the field of boiler return feeder technology. Among them, patent application number CN217584420U discloses a biomass boiler return feeder unclogging device. Its basic description is as follows: This utility model proposes a biomass boiler return feeder unclogging device that can solve or reduce the problem of boiler damage caused by blockage of the biomass boiler return feeder. The unclogging device includes a unclogging pipe and a pneumatic blanking assembly. The unclogging pipe includes a first unclogging pipe and a second unclogging pipe. The first unclogging pipe is longer than the second unclogging pipe, and both have mounting flanges around the top opening, connected by an inclined pipe in the middle. The pneumatic blanking assembly is mounted at the bottom of the first unclogging pipe and includes a fixing ring, side plates, an arc-shaped baffle, a connecting plate, and a cylinder. The fixing ring is mounted around the outer periphery of the bottom of the first unclogging pipe. The side plates are a pair, one end of which is hingedly mounted to the fixing ring via a hinge shaft, and the other end is fixedly connected to the side of the arc-shaped baffle. The connecting plate connects the two side plates. The cylinder is hingedly mounted on the bottom end of the first dredging pipe, and the piston rod is downwardly directed and hingedly connected to the connecting plate. The bottom opening of the second dredging pipe is provided with a plug.

[0004] In the existing technology, the returner is prone to coking in key internal parts during operation due to factors such as high temperature environment, strong adhesion of fuel ash or long retention time of materials. Once coking occurs, it will not only hinder the normal circulation and reflux of bed material and reduce the material flow efficiency, but also cause local blockage, thereby affecting the overall combustion stability and thermal efficiency of the boiler. At the same time, coking will significantly increase the difficulty of unblocking operations, reduce the maintainability and operational reliability of the system, and be detrimental to subsequent cleaning and maintenance operations.

[0005] Based on this, the present invention designs a boiler return feeder anti-coking dredging mechanism to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem that during the operation of the return feeder, coking may easily form in key internal parts due to factors such as high temperature environment, strong adhesion of fuel ash or long retention time of material. Once coking occurs, it will not only hinder the normal circulation and reflux of bed material and reduce the material flow efficiency, but also cause local blockage, thereby affecting the overall combustion stability and thermal efficiency of the boiler. At the same time, coking will significantly increase the difficulty of unblocking operations, reduce the maintainability and operational reliability of the system, and be unfavorable for subsequent cleaning and maintenance operations. A boiler return feeder anti-coking dredging mechanism is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A boiler return feeder anti-coking dredging mechanism comprises a boiler body, a support frame is mounted on one side of the boiler body, a cyclone separator is mounted on the support frame, a return feeder body is mounted within the support frame, a knocking device is fixedly connected below the return feeder body, a rotating device is fixedly connected below the knocking device, and a discharge device is fixedly connected to one side of the return feeder body; The knocking device includes a first motor and a mounting plate, the front of the mounting plate is fixedly connected to a locking plate, the front of the locking plate is fixedly connected to a shell, a sliding rod is slidably connected in the shell, and the upper end of the sliding rod is fixedly connected to a knocking hammer.

[0008] As a further description of the above technical solution: The knocking device also includes a connecting plate, which is fixedly connected to the support frame. The output end of the first motor is fixedly connected to a rotating shaft, a rotating ring is provided on the outer sleeve of the rotating shaft, and a sleeve is provided on the outer sleeve of the rotating shaft. A rotational connection is formed between the sleeve and the mounting plate, and a toggle rod is fixedly connected to the eccentric part of the sleeve. A driving rod is hinged to the outside of the sleeve through a pin, and the sliding rod is hinged to the inside of the driving rod through a pin.

[0009] As a further description of the above technical solution: The outer sleeve of the sliding rod is provided with a circular plate, and the outer sleeve of the sliding rod is provided with a pull-back spring. One end of the pull-back spring is fixedly connected in the circular plate, and the other end of the pull-back spring is fixedly connected in the shell.

[0010] As a further description of the above technical solution: The diameter of the cross section of the circular plate is smaller than the inner diameter of the shell, and a sliding connection is formed between the circular plate and the shell.

[0011] As a further description of the above technical solution: The knocking device also includes a bearing plate, which is fixedly connected to the lower surface of the returner body, and the bearing plate corresponds to the position of the knocking hammer.

[0012] As a further description of the above technical solution: Bumps are symmetrically mounted on the outside of the rotating ring, and one of the bumps is clamped on the outside of the toggle rod.

[0013] As a further description of the above technical solution: The rotating device includes a horizontal plate, a second motor and a connecting frame, the horizontal plate is fixedly connected to the support frame, the second motor is fixedly connected to the support frame, the upper surface of the horizontal plate is fixedly connected to two vertical plates, the output end of the second motor is fixedly connected to a worm, the worm is installed in the two vertical plates, the worm is engaged with a worm wheel on the outside, the connecting frame is fixedly connected to the upper surface of the horizontal plate, a rotating rod is passed through the connecting frame, the rotating rod is connected to the worm wheel, the upper surface of the rotating rod is fixedly connected to the drive shaft, and the upper surface of the drive shaft is fixedly connected to the rotating plate.

[0014] As a further description of the above technical solution: The worm gear is rotationally connected with the two vertical plates, the rotating rod is rotationally connected with the horizontal plate, the driving shaft is rotationally connected with the connecting plate, and the rotating plate is overlapped on the upper surface of the connecting plate, and the mounting plate and the first motor are fixedly connected to the upper surface of the rotating plate.

[0015] As a further description of the above technical solution: The discharge device includes a sliding frame, which is fixedly connected to one side of the returner body. A baffle is slidably connected in the sliding frame, and a handle is fixedly connected to the upper surface of the baffle. A discharge port is opened on one side of the returner body, and the baffle and the discharge port are positioned correspondingly.

[0016] As a further description of the above technical solution: The auxiliary device includes a rectangular plate, a sliding shell and a second magnetic block. The rectangular plate is fixedly connected to the outside of the rotating plate, and a linkage rod is rotatably connected to the rectangular plate. The sliding shell is fixedly connected to the lower surface of the returner body. The sliding shell is slidably connected to the first magnetic block, and the first magnetic block is fixedly connected to the upper end of the linkage rod. The second magnetic block is overlapped in the returner body. The second magnetic block is provided with a dredging plate on the outer sleeve, and a sleeve plate is fixedly connected to one side of the dredging plate. A shaft body is rotatably connected in the sleeve plate, and the shaft body is fixedly connected to the returner body. The first magnetic block and the second magnetic block are magnetically adsorbed.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, the first motor can be started during the operation of the boiler, and the first motor drives the rotating shaft to rotate, and the rotating shaft drives the rotating ring connected thereto to rotate synchronously. During the rotation process, the rotating ring pushes the protrusion provided on its outer edge to rotate. When the protrusion rotates to a predetermined position, it contacts the toggle rod and applies a thrust, causing the toggle rod to move forward, thereby driving the collar. The collar is linked to the driving rod through a pin shaft, and the driving rod drives the slide rod to slide in the shell through another pin shaft. While the slide rod moves, it drives the percussion hammer connected thereto to reciprocate in a direction away from the bearing plate. When the rotating ring continues to rotate to a half-turn position, the protrusion is disengaged from the toggle rod. At this time, under the elastic force of the return spring, the circular plate slides backward, and drives the slide rod and the knocking hammer to quickly reset in the opposite direction, and finally realizes the impact of the knocking hammer on the receiving plate. This action can apply periodic vibration to the returner body, effectively causing the initial unsolidified coke or attached particles inside to fall from the inner wall or structural dead corners to the bottom of the returner, preventing the accumulation of coke blocks and causing blockage. In addition, when the boiler stops running, the handle can be manually pulled to make the handle drive the baffle to move away from the slide frame, thereby releasing the discharge port in the closed state, realizing the rapid cleaning of residual materials or coke blocks at the bottom of the returner, and improving maintenance efficiency.

[0018] 2. In the present invention, during the normal operation of the boiler, the second motor can also be started as needed. The output power of the second motor drives the worm to rotate, and the worm meshes to drive the worm wheel to rotate synchronously. The worm wheel further drives the rotating rod to rotate. The rotating rod is connected to the drive shaft. The drive shaft rotates continuously under its drive, and then drives the rotating plate installed at its end to perform circular motion. During the rotation of the rotating plate, the knocking hammer is driven to rotate at a constant speed around the lower surface of the returner body, thereby achieving continuous and uniform knocking on the bottom edge area of the returner. This structure can cover multiple circumferential positions that the knocking hammer cannot reach, effectively avoiding the "vibration dead angle" problem of single-point impact, and improving the anti-coking coverage and coking efficiency of the entire machine, thereby further ensuring the stability of the returner operation and the smoothness of material circulation.

[0019] 3. In the present invention, when the rotating plate starts to rotate, it drives the rectangular plate connected thereto to rotate synchronously, and the rectangular plate further drives the linkage rod to rotate. During the rotation of the linkage rod, the first magnetic block slides along its guide structure inside the sliding shell, and relies on the magnetic effect to drive the second magnetic block to produce synchronous displacement. As the second magnetic block moves, the dredging plate and the sleeve plate rotate synchronously under their linkage, and the sleeve plate rotates relative to each other outside the shaft, which can effectively disturb the bottom of the returner body, thereby reducing the adhesion and accumulation of coke blocks on the bottom surface. When the baffle is opened, the dredging plate continues to rotate to help discharge the residual materials or coke blocks at the bottom smoothly, thereby improving the dredging efficiency and equipment cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a three-dimensional structural diagram of a boiler return feeder anti-coking dredging mechanism proposed by the present invention; Figure 2 This is a three-dimensional structural diagram of a support frame for a boiler return feeder anti-coking dredging mechanism proposed by the present invention; Figure 3 This is a three-dimensional structural diagram of the return material body of a boiler return material anti-coking dredging mechanism proposed by the present invention; Figure 4 This is a three-dimensional structural diagram of a knocking device for a boiler return feeder anti-coking dredging mechanism proposed by the present invention; Figure 5 A boiler return feeder anti-coking dredging mechanism proposed by the present invention Figure 4 A schematic diagram of the structure of the enlarged portion B; Figure 6 This is a three-dimensional structural diagram of a rotating device for a boiler return feeder anti-coking dredging mechanism proposed by the present invention; Figure 7 A boiler return feeder anti-coking dredging mechanism proposed by the present invention Figure 2 Schematic diagram of the structure with part A enlarged.

[0021] Figure 8 This is a three-dimensional structural schematic diagram of an auxiliary device for the anti-coking dredging mechanism of a boiler return feeder proposed by the present invention.

[0022] Figure 9 This is a schematic diagram of the three-dimensional cross-sectional structure of the return material feeder body of the boiler return material feeder anti-coking dredging mechanism proposed by the present invention.

[0023] Legend: 1. Boiler body; 2. Support frame; 3. Cyclone separator; 4. Return feeder body; 5. Knocking device; 501. Connecting plate; 502. Mounting plate; 503. First motor; 504. Rotating shaft; 505. Collar; 506. Rotating ring; 507. Toggle lever; 508. Drive lever; 509. Sliding rod; 510. Locking plate; 511. Housing; 512. Circular plate; 513. Return spring; 514. Knocking hammer; 515. Bearing plate; 6. Rotating device; 601. Horizontal Plate; 602, second motor; 603, vertical plate; 604, worm; 605, worm wheel; 606, connecting frame; 607, rotating rod; 608, driving shaft; 609, rotating plate; 7, discharge device; 701, sliding frame; 702, baffle; 703, handle; 8, auxiliary device; 801, rectangular plate; 802, linkage rod; 803, sliding shell; 804, first magnetic block; 805, second magnetic block; 806, dredging plate; 807, sleeve plate; 808, shaft. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] See also Figures 1-9 The present invention provides a technical solution: a boiler return feeder anti-coking dredging mechanism, comprising a boiler body 1, a support frame 2 is installed on one side of the boiler body 1, a cyclone separator 3 is installed on the support frame 2, a return feeder body 4 is installed inside the support frame 2, a knocking device 5 is fixedly connected to the bottom of the return feeder body 4, a rotating device 6 is fixedly connected to the bottom of the knocking device 5, a discharge device 7 is fixedly connected to one side of the return feeder body 4, and an auxiliary device 8 is fixedly connected to the outside of the rotating device 6; The striking device 5 includes a first motor 503 and a mounting plate 502. The front of the mounting plate 502 is fixedly connected to a locking plate 510. The front of the locking plate 510 is fixedly connected to a shell 511. A slide rod 509 is slidably connected inside the shell 511. The upper end of the slide rod 509 is fixedly connected to a striking hammer 514.

[0026] Specifically, such as Figure 2-Figure 5 As shown, the knocking device 5 also includes a connecting plate 501, which is fixedly connected to the support frame 2, and the output end of the first motor 503 is fixedly connected to a rotating shaft 504, and a rotating ring 506 is provided on the outer sleeve of the rotating shaft 504, and a sleeve 505 is provided on the outer sleeve of the rotating shaft 504. A rotation connection is formed between the sleeve 505 and the mounting plate 502, and a toggle rod 507 is fixedly connected to the eccentric position of the sleeve 505. The toggle rod 507 is fixed at the eccentric position of the sleeve 505, and the non-coaxial displacement drive is realized by the eccentric installation. When the rotating ring 506 drives the protrusion to push the toggle rod 507, the sleeve 505 deflects accordingly, and then drives the subsequent driving rod 508 mechanism. The eccentric cooperation enables the toggle rod 507 to realize nonlinear conversion motion, thereby providing good dynamic starting conditions for the subsequent push rod chain, which is conducive to the accumulation and release of impact energy. A driving rod 508 is hinged on the outside of the collar 505 through a pin, and a sliding rod 509 is hinged inside the driving rod 508 through a pin. A circular plate 512 is provided on the outer sleeve of the sliding rod 509, and a return spring 513 is provided on the outer sleeve of the sliding rod 509. One end of the return spring 513 is fixedly connected to the circular plate 512, and the other end of the return spring 513 is fixedly connected to the shell 511. One end of the return spring 513 is fixed in the circular plate 512, and the other end is fixed to the inner wall of the shell 511. After the protrusion releases the toggle rod 507, the spring releases the stored energy and quickly pulls the circular plate 512 to move toward the initial direction of the shell 511. This matching structure can realize automatic reset action without relying on electronic control, providing a stable reciprocating cycle basis for the knocking mechanism; The diameter of the cross section of the circular plate 512 is smaller than the inner diameter of the shell 511, and a sliding connection is formed between the circular plate 512 and the shell 511. The knocking device 5 also includes a supporting plate 515, which is fixedly connected to the lower surface of the returner body 4, and the supporting plate 515 corresponds to the position of the knocking hammer 514. The outside of the rotating ring 506 is symmetrically installed with protrusions, and one of the protrusions is stuck outside the toggle rod 507. The rotating ring 506 rotates under the drive of the first motor 503, and its outer edge is provided with symmetrical protrusions. The protrusions periodically contact the toggle rod 507 as the rotating ring 506 moves. This structural combination can realize the rhythmic drive of the toggle rod 507, forming a mechanical intermittent thrust output, which helps the sliding rod 509 and the knocking hammer 514 to produce a stable reciprocating impact rhythm, avoiding structural fatigue or efficiency waste caused by continuous impact.

[0027] Specifically, such as Figure 6-Figure 7 As shown, the rotating device 6 includes a horizontal plate 601, a second motor 602 and a connecting frame 606. The horizontal plate 601 is fixedly connected to the support frame 2, the second motor 602 is fixedly connected to the support frame 2, the upper surface of the horizontal plate 601 is fixedly connected to two vertical plates 603, the output end of the second motor 602 is fixedly connected to a worm 604, the worm 604 is installed in the two vertical plates 603, the worm 604 is meshed with a worm wheel 605 on the outside, the connecting frame 606 is fixedly connected to the upper surface of the horizontal plate 601, a rotating rod 607 is provided through the connecting frame 606, the rotating rod 607 is connected to the worm wheel 605, the upper surface of the rotating rod 607 is fixedly connected to the drive shaft 608, and the upper surface of the drive shaft 608 is fixedly connected It is connected to a rotating plate 609, a worm 604, and a rotational connection is formed in the worm 604 and the two vertical plates 603, a rotational connection is formed between the rotating rod 607 and the horizontal plate 601, a rotational connection is formed between the drive shaft 608 and the connecting plate 501, and the rotating plate 609 is overlapped on the upper surface of the connecting plate 501, the mounting plate 502 and the first motor 503 are fixedly connected to the upper surface of the rotating plate 609, the discharge device 7 includes a sliding frame 701, the sliding frame 701 is fixedly connected to one side of the returner body 4, a baffle 702 is slidably connected in the sliding frame 701, and a handle 703 is fixedly connected to the upper surface of the baffle 702, and a discharge port is opened on one side of the returner body 4, and the position of the baffle 702 corresponds to the discharge port.

[0028] Specifically, such as Figure 8-Figure 9As shown, the auxiliary device 8 includes a rectangular plate 801, a sliding shell 803 and a second magnetic block 805. The rectangular plate 801 is fixedly connected to the outside of the rotating plate 609. The rectangular plate 801 is rotatably connected to the linkage rod 802. The sliding shell 803 is fixedly connected to the lower surface of the returner body 4. The sliding shell 803 is slidably connected to the first magnetic block 804. The first magnetic block 804 is fixedly connected to the upper end of the linkage rod 802. The second magnetic block 805 is overlapped in the returner body 4. The second magnetic block 805 is provided with a dredging plate 806 on the outer sleeve. One side of the dredging plate 806 is fixedly connected to a sleeve plate 807. The sleeve plate 807 is rotatably connected to a shaft 808. The shaft 808 is fixedly connected to the returner body 4. The first magnetic block 804 and the second magnetic block 805 are magnetically adsorbed.

[0029] Working principle: when in use: during the operation of the boiler, the first motor 503 can be started, the first motor 503 drives the rotating shaft 504 to rotate, and the rotating shaft 504 drives the connected rotating ring 506 to rotate synchronously. During the rotation, the rotating ring 506 pushes the protrusion provided on its outer edge to rotate. When the protrusion rotates to a predetermined position, it contacts the toggle rod 507 and applies a thrust to move the toggle rod 507 forward, thereby driving the collar 505. The collar 505 is linked to the driving rod 508 through the pin shaft, and the driving rod 508 drives the sliding rod 509 to slide in the shell 511 through another pin shaft. When the sliding rod 509 moves, it drives the knocking hammer 514 connected to it to reciprocate in the direction away from the bearing plate 515. When the rotating ring 506 continues to rotate to a half-circle position, the protrusion The circular plate 512 is out of contact with the toggle rod 507. At this time, under the elastic force of the return spring 513, the circular plate 512 slides backward, and drives the sliding rod 509 and the knocking hammer 514 to quickly reset in the opposite direction, and finally realizes the impact of the knocking hammer 514 on the receiving plate 515. This action can apply periodic vibration to the return material device body 4, effectively causing the initial unsolidified coke or attached particles inside to fall from the inner wall or structural dead corner to the bottom of the return material device, preventing the accumulation of coke blocks and causing blockage. In addition, when the boiler stops running, the handle 703 can be manually pulled to make the handle 703 drive the baffle 702 to move away from the sliding frame 701, thereby releasing the discharge port in the closed state, realizing the rapid cleaning of the residual materials or coke blocks at the bottom of the return material device, and during the normal operation of the boiler, The second motor 602 can be started as needed, and the second motor 602 outputs power to drive the worm 604 to rotate, and the worm 604 engages to drive the worm gear 605 to rotate synchronously, and the worm gear 605 further drives the rotating rod 607 to rotate, and the rotating rod 607 is connected to the driving shaft 608. The driving shaft 608 realizes continuous rotation under its drive, and then drives the rotating plate 609 installed at its end to do circular motion. During the rotation process, the rotating plate 609 drives the knocking hammer 514 to rotate at a constant speed around the lower surface of the return material device body 4, thereby achieving continuous and uniform knocking of the bottom edge area of the return material device. This structure can cover multiple circumferential positions that the knocking hammer 514 cannot reach, thereby completing the knocking and cleaning of the return material device body 4; when the rotating plate 609 starts to rotate , driving the rectangular plate 801 connected thereto to rotate synchronously, and the rectangular plate 801 further drives the linkage rod 802 to rotate. During the rotation of the linkage rod 802, the first magnetic block 804 slides along its guide structure inside the sliding shell 803, and relies on the magnetic effect to drive the second magnetic block 805 to produce synchronous displacement. As the second magnetic block 805 moves, the dredging plate 806 and the sleeve plate 807 rotate synchronously under their linkage, and the sleeve plate 807 rotates relative to the outside of the shaft 808, which can effectively disturb the bottom of the returner body 4, thereby reducing the adhesion and accumulation of coke blocks on the bottom surface. When the baffle 702 is opened, the dredging plate 806 continues to rotate to help discharge the residual materials or coke blocks at the bottom smoothly, thereby improving the dredging efficiency and equipment cleaning effect.

[0030] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A boiler return feeder anti-coking dredging mechanism, comprising a boiler body (1), characterized in that: A support frame (2) is installed on one side of the boiler body (1), a cyclone separator (3) is installed on the support frame (2), a returner body (4) is installed inside the support frame (2), a knocking device (5) is fixedly connected below the returner body (4), a rotating device (6) is fixedly connected below the knocking device (5), a discharge device (7) is fixedly connected to one side of the returner body (4), and an auxiliary device (8) is fixedly connected outside the rotating device (6); The knocking device (5) comprises a first motor (503) and a mounting plate (502); a locking plate (510) is fixedly connected to the front of the mounting plate (502); a housing (511) is fixedly connected to the front of the locking plate (510); a sliding rod (509) is slidably connected in the housing (511); and a knocking hammer (514) is fixedly connected to the upper end of the sliding rod (509).

2. A boiler return feeder anti-coking dredging mechanism according to claim 1, characterized in that: The knocking device (5) further comprises a connecting plate (501), wherein the connecting plate (501) is fixedly connected to the support frame (2), the output end of the first motor (503) is fixedly connected to a rotating shaft (504), the outer shell of the rotating shaft (504) is provided with a rotating ring (506), the outer shell of the rotating shaft (504) is provided with a sleeve (505), a rotational connection is formed between the sleeve (505) and the mounting plate (502), an eccentric portion of the sleeve (505) is fixedly connected to a toggle rod (507), the outer surface of the sleeve (505) is hinged to a driving rod (508) via a pin, and the sliding rod (509) is hinged to the inside of the driving rod (508) via a pin.

3. A boiler return feeder anti-coking dredging mechanism according to claim 2, characterized in that: The outer sleeve of the slide rod (509) is provided with a circular plate (512), and the outer sleeve of the slide rod (509) is provided with a return spring (513), one end of the return spring (513) is fixedly connected in the circular plate (512), and the other end of the return spring (513) is fixedly connected in the housing (511).

4. A boiler return feeder anti-coking dredging mechanism according to claim 3, characterized in that: The diameter of the cross section of the circular plate (512) is smaller than the inner diameter of the housing (511), and a sliding connection is formed between the circular plate (512) and the housing (511).

5. A boiler return feeder anti-coking dredging mechanism according to claim 3, characterized in that: The knocking device (5) further comprises a bearing plate (515), wherein the bearing plate (515) is fixedly connected to the lower surface of the returner body (4), and the bearing plate (515) corresponds to the position of the knocking hammer (514).

6. A boiler return feeder anti-coking dredging mechanism according to claim 2, characterized in that: The rotating ring (506) is symmetrically provided with protrusions, and one of the protrusions is clamped on the outside of the toggle rod (507).

7. A boiler return feeder anti-coking dredging mechanism according to claim 1, characterized in that: The rotating device (6) comprises a transverse plate (601), a second motor (602) and a connecting frame (606), wherein the transverse plate (601) is fixedly connected to the support frame (2), the second motor (602) is fixedly connected to the support frame (2), the upper surface of the transverse plate (601) is fixedly connected to two vertical plates (603), the output end of the second motor (602) is fixedly connected to a worm (604), the worm (604) is installed in the two vertical plates (603), and the worm (604) is externally engaged with a worm wheel (605), the connecting frame (606) is fixedly connected to the upper surface of the transverse plate (601), a rotating rod (607) is provided through the connecting frame (606), the rotating rod (607) is connected through the worm wheel (605), the upper surface of the rotating rod (607) is fixedly connected to a drive shaft (608), and the upper surface of the drive shaft (608) is fixedly connected to a rotating plate (609).

8. A boiler return feeder anti-coking dredging mechanism according to claim 7, characterized in that: The worm (604) forms a rotational connection with the two vertical plates (603), the rotating rod (607) forms a rotational connection with the horizontal plate (601), the driving shaft (608) forms a rotational connection with the connecting plate (501), and the rotating plate (609) overlaps the upper surface of the connecting plate (501), and the mounting plate (502) and the first motor (503) are both fixedly connected to the upper surface of the rotating plate (609).

9. A boiler return feeder anti-coking dredging mechanism according to claim 8, characterized in that: The discharge device (7) includes a sliding frame (701), the sliding frame (701) is fixedly connected to one side of the returner body (4), a baffle (702) is slidably connected inside the sliding frame (701), a handle (703) is fixedly connected to the upper surface of the baffle (702), and a discharge port is opened on one side of the returner body (4), and the baffle (702) and the discharge port are positioned correspondingly.

10. A boiler return feeder anti-coking dredging mechanism according to claim 1, characterized in that: The auxiliary device (8) includes a rectangular plate (801), a sliding shell (803) and a second magnetic block (805), wherein the rectangular plate (801) is fixedly connected to the outside of the rotating plate (609), and a linkage rod (802) is rotatably connected inside the rectangular plate (801), and the sliding shell (803) is fixedly connected to the lower surface of the return material device body (4), and a first magnetic block (804) is slidably connected inside the sliding shell (803), and the first magnetic block (804) is fixedly connected to the linkage rod. The upper end of (802), the second magnetic block (805) is overlapped in the return device body (4), the outer cover of the second magnetic block (805) is provided with a dredging plate (806), one side of the dredging plate (806) is fixedly connected with a sleeve plate (807), the sleeve plate (807) is rotatably connected with a shaft (808), the shaft (808) is fixedly connected in the return device body (4), and the first magnetic block (804) and the second magnetic block (805) are magnetically attracted to each other.

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