A coal drop pipe cleaning device and dismounting method

Abstract

A coal chute cleaning device and dismounting method belong to the technical field of coal feeders. The coal chute cleaning device comprises a motor and a speed reducer capable of being fixedly installed at the top of the coal chute, the speed reducer is a worm and gear speed reducer, further comprises a connecting shaft arranged in the coal chute, the connecting shaft is fixedly provided with blades, the top end of the connecting shaft penetrates the coal chute upward and is connected with the hollow output shaft of the speed reducer, the connecting shaft is fixedly provided with a baffle, the baffle is used for abutting against the inner wall of the top end of the coal chute, the top end of the connecting shaft is detachably installed with a limiting assembly, and the limiting assembly is used for limiting the downward movement of the connecting shaft. The hollow output shaft of the speed reducer is directly connected with the connecting shaft, the vertical limiting of the connecting shaft is realized through the cooperation of the detachable limiting assembly and the baffle, the detachable design of the limiting assembly makes the dismounting of the connecting shaft not need to damage the original connecting structure, greatly simplifies the dismounting operation and reduces the maintenance and replacement cost.

Description

Technical Field

[0001] This invention relates to the field of coal feeder technology, and in particular to a coal chute cleaning device and its disassembly and assembly method. Background Technology

[0002] A coal feeder is a type of equipment mainly used in coal conveying systems in thermal power plants, coal mines, or coal preparation plants. Its core function is to uniformly, continuously, and controllably push raw coal from the coal bunker and transport it to belt conveyors or other grinding equipment. By adjusting its operating speed or coal feeding rate, it can effectively meet the load requirements of subsequent systems and prevent coal flow blockage or coal shortage.

[0003] Coal feeders are usually used in conjunction with coal chutes to transport coal blocks. When the coal chutes become clogged with coal, a cleaning device is needed to clean and prevent clogging. Existing cleaning devices usually have a motor installed at the coal chutes, with the motor's output end fixedly connected to the scraper's shaft via a reducer. The scraper is placed inside the coal chutes, and the motor drives the scraper to rotate around the shaft, thereby scraping off the coal adhering to the inner wall of the coal chutes.

[0004] The existing coal chute cleaning device has a fastening sleeve and other connecting structures welded to the rotating shaft. The fastening sleeve is fixed to the reducer. When the scraper is damaged, the rotating shaft and the fastening sleeve need to be removed and replaced as a whole, which is costly. In addition, the motor and reducer need to be removed first, and then the fastening sleeve needs to be removed. The disassembly and assembly process is complicated and affects work efficiency. Summary of the Invention

[0005] To address the technical problems of existing coal chute cleaning devices mentioned above, such as the complex disassembly and assembly process of the rotating shaft affecting work efficiency, the need to replace the entire rotating shaft and connecting structure, and the high maintenance costs, this invention provides a coal chute cleaning device and disassembly / assembly method.

[0006] The technical solution of this invention is as follows: This invention provides a coal chute cleaning device for cleaning the inside of a coal chute. The top of the coal chute is sealed, and a feed inlet is provided on the side wall of the coal chute. The coal chute cleaning device includes a motor and a reducer that can be fixedly installed on the top of the coal chute. The reducer is a worm gear reducer. It also includes a connecting shaft disposed inside the coal chute. A blade is fixedly disposed on the connecting shaft. The top of the connecting shaft passes upward through the coal chute and is connected to the hollow output shaft of the reducer. A baffle is fixedly disposed on the connecting shaft. The baffle is used to abut against the inner wall of the top of the coal chute. A limit component is detachably installed on the top of the connecting shaft to limit the downward movement of the connecting shaft. The connecting shaft is directly connected to the hollow output shaft of the reducer. The vertical positioning of the connecting shaft is achieved through a detachable limiting component. The blades rotate with the connecting shaft to scrape and clean the coal adhering to the inner wall of the coal chute. The characteristics of the worm gear reducer are adapted to the power requirements of coal chute cleaning. The abutment structure of the baffle can play an auxiliary role in vertically limiting the connecting shaft, making the installation and positioning of the connecting shaft more stable. The detachable design of the limiting component allows the connecting shaft to be disassembled and installed without damaging the original connection structure, greatly simplifying the disassembly and assembly operation while reducing the cost of maintenance and replacement.

[0007] Preferably, a flange seat is fixedly installed on the top of the reducer. The flange seat has an opening at the top, and the top end of the connecting shaft passes through the reducer and is placed inside the flange seat. The limiting component is rotatably disposed inside the flange seat and detachably connected to the top end of the connecting shaft. The flange seat is used for fixed connection with the coal feeder. The flange seat not only achieves a stable connection between the cleaning device and the coal feeder, but also provides dedicated installation space for the limiting component, making the installation of the limiting component more orderly and the fit with the connecting shaft more precise. The top end of the connecting shaft extends into the flange seat and connects with the limiting component, allowing the limiting component to limit the connecting shaft more directly. The rotatably disposed limiting component adapts to the rotational working state of the connecting shaft and will not affect the limiting effect due to the normal rotation of the connecting shaft. At the same time, the structural design of the flange seat allows the installation and removal of the limiting component to be completed within the flange seat, making the operating space more reasonable and the installation and removal more convenient.

[0008] Preferably, the limiting assembly includes a locking sleeve, a support base, and a limiting seat. The support base is fixedly installed inside the flange seat and has an annular structure. The limiting seat is rotatably disposed inside the support base and has a cylindrical structure. A vertically arranged recess is provided on the inner wall of the limiting seat. The locking sleeve is detachably installed inside the limiting seat. A protrusion is fixedly provided on the outer wall of the locking sleeve for insertion into the recess. A locking groove is provided on the side wall of the locking sleeve. A locking rod is fixedly provided on the outer wall of the top end of the connecting shaft. The top end of the connecting shaft is inserted into the locking sleeve, and the locking rod is inserted into the locking groove. The support base provides stable installation support for the limit seat. The ring and cylindrical structural design adapts to the columnar structure of the connecting shaft, allowing for a closer fit between the components. The insertion fit of the recessed and protruding parts enables circumferential positioning of the locking sleeve and the limit seat, preventing the locking sleeve from rotating circumferentially within the limit seat. The fit between the locking rod and the locking groove ensures a firm connection between the connecting shaft and the locking sleeve, allowing the limit assembly to reliably limit the vertical position of the connecting shaft through the locking sleeve. The detachable assembly of each component allows individual parts of the limit assembly to be independently disassembled and replaced, further reducing maintenance costs. At the same time, the simple fit of each component and the lack of special tools for disassembly and assembly enhance the ease of operation.

[0009] Preferably, the locking groove is an inverted L-shaped groove, which includes a vertical section and a horizontal section. The entire locking groove radially penetrates the side wall of the locking sleeve, and the bottom end of the vertical section penetrates the bottom of the side wall of the locking sleeve. The inverted L-shaped locking groove structure is adapted to the insertion and positioning of the locking rod. The vertical section facilitates the smooth insertion of the locking rod from the bottom of the locking sleeve, and the horizontal section can form a circumferential locking limit for the locking rod, effectively preventing the connecting shaft from separating from the locking sleeve during rotation and operation. The radial penetration of the locking groove makes the insertion and separation of the locking rod smoother and unobstructed. The through structure at the bottom of the vertical section eliminates the need for additional alignment operations when installing the locking rod, further simplifying the connection operation between the connecting shaft and the locking sleeve and improving the efficiency of disassembly and assembly.

[0010] Preferably, the axis of the locking rod is perpendicular to the axis of the connecting shaft, allowing the locking rod to form a vertical engagement with the horizontal section of the L-shaped locking groove. This results in a more even distribution of force during engagement, effectively withstanding the vertical tension of the connecting shaft and improving the connection's stability. The length of the locking rod is the same as the wall thickness of the locking sleeve, ensuring that the locking rod does not protrude from the outer wall of the locking sleeve after being engaged in the locking groove. This prevents interference between the locking rod and the inner wall of the limiting seat, ensuring that the locking sleeve can be smoothly installed in the limiting seat. At the same time, it makes the fit between the components more compact and the overall structure more regular.

[0011] Preferably, the top of the recess penetrates the top of the inner wall of the limiting seat, facilitating the smooth insertion of the protrusion into the recess from the top of the limiting seat, simplifying the assembly operation of the locking sleeve and the limiting seat. The length of the recess is less than the length of the limiting seat; the length of the protrusion is less than the length of the locking sleeve, allowing the protrusion to form a vertical limiting structure after being inserted into the recess, while avoiding interference between the ends of the protrusion and the recess and other components, ensuring the stability of the fit and smoothness of the rotation of each component inside the limiting assembly.

[0012] Preferably, a buffer limiting mechanism is provided between the support base and the limiting base. The buffer limiting mechanism includes several limiting rods fixedly arranged at intervals along the circumference. The limiting rods are T-shaped structures. A stepped groove is opened in the side wall of the limiting base. The stepped groove extends along the circumference of the limiting base. The limiting rods are vertically inserted into the stepped groove. A spring is sleeved on the limiting rod. The spring is located between the limiting base and the support base. The circumferentially arranged limiting rod, in conjunction with the stepped groove, provides circumferential and vertical limiting for the limiting seat, preventing separation between the limiting seat and the support seat. The T-shaped limiting rod prevents itself from detaching from the stepped groove, enhancing the structural stability of the buffer limiting mechanism. The spring provides vertical buffering force to the limiting seat. When the connecting shaft vibrates during operation, the spring absorbs some of the vibration force, reducing the impact of vibration on the limiting components and the reducer. Simultaneously, when the limiting seat is manually pressed, the spring can compress and deform, allowing the protrusion and recess to separate smoothly, providing convenient operation conditions for the disassembly and assembly of the locking sleeve. The circumferential spacing ensures more even force distribution for buffering and limiting.

[0013] Preferably, the extension direction of the closed end of the horizontal section is the same as the rotation direction of the connecting shaft around the shaft. When the connecting shaft rotates around the shaft during normal operation, the locking rod will move towards the closed end of the horizontal section and press against it. The rotational force of the connecting shaft makes the locking rod and the locking groove more secure, effectively preventing the locking rod from sliding out of the horizontal section to the vertical section during operation, avoiding the connection shaft and the locking sleeve from loosening, further improving the reliability of the connection between the connecting shaft and the limiting component, and ensuring the stability of the cleaning device during operation.

[0014] A disassembly and assembly method includes: when disassembling the connecting shaft, manually pressing down on the limiting seat to separate the protrusion from the recess, then rotating the locking sleeve and pulling it upward to unlock and separate the locking rod from the locking groove; after removing the locking sleeve, directly pulling the connecting shaft downward from the feed inlet on the side wall of the coal chute to separate the connecting shaft from the output shaft of the reducer. Manually pressing the limiting seat achieves the separation of the protrusion and recess, a simple operation requiring no special tools. Rotating and pulling upward on the locking sleeve quickly unlocks the locking rod from the locking groove, with a smooth and uninterrupted unlocking process. After removing the locking sleeve, directly pulling the connecting shaft downward from the feed inlet completes disassembly without removing the motor and reducer, significantly reducing disassembly steps and time. The ample operating space at the feed inlet makes disassembly of the connecting shaft more convenient, effectively improving the efficiency of maintenance and replacement.

[0015] Preferably, when installing the connecting shaft, it is installed inside the coal chute, with the top end of the connecting shaft passing through the coal chute, flange seat, and support seat in sequence. The locking sleeve is then fastened to the top end of the connecting shaft, and the locking sleeve is rotated to engage the locking rod in the locking groove. Then, the limiting seat is rotated to insert the protrusion into the recess. Simply fastening the locking sleeve to the top end of the connecting shaft and rotating it completes the engagement of the locking rod and the locking groove. The engagement operation is simple and efficient. Finally, rotating the limiting seat completes the insertion of the protrusion into the recess, thus completing the installation and fixation of the entire connecting shaft. The entire installation process is clear in its steps, with precise coordination between each link. There is no need to disassemble or reassemble the motor or reducer, the installation time is short, and the replacement and reset of the connecting shaft can be completed quickly, allowing the cleaning device to resume operation as soon as possible and improving the overall operating efficiency.

[0016] As can be seen from the above technical solutions, the advantages of the present invention are: 1. The connecting shaft is directly connected to the hollow output shaft of the reducer. The vertical limiting component of the connecting shaft is used to fix the connecting shaft vertically. The blades rotate with the connecting shaft to scrape and clean the coal adhering to the inner wall of the coal chute. The characteristics of the worm gear reducer are adapted to the power requirements of coal chute cleaning. The abutment structure of the baffle can play an auxiliary role in vertically limiting the connecting shaft, making the installation and positioning of the connecting shaft more stable. The detachable design of the limiting component allows the connecting shaft to be disassembled and installed without damaging the original connection structure, greatly simplifying the disassembly and assembly operation and reducing the cost of maintenance and replacement.

[0017] 2. The circumferentially arranged limiting rod, in conjunction with the stepped groove, provides circumferential and vertical limiting for the limiting seat, preventing separation between the limiting seat and the support seat. The T-shaped limiting rod prevents itself from detaching from the stepped groove, enhancing the structural stability of the buffer limiting mechanism. The spring provides vertical buffering force to the limiting seat. When the connecting shaft vibrates during operation, the spring absorbs some of the vibration force, reducing the impact of vibration on the limiting components and the reducer. Simultaneously, when the limiting seat is manually pressed, the spring can compress and deform, allowing the protrusion and recess to separate smoothly, providing convenient operating conditions for the disassembly and assembly of the locking sleeve. The circumferential spacing ensures more even force distribution for buffering and limiting. Attached Figure Description

[0018] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the coal chute cleaning device according to one or more embodiments of the present invention. Figure 2This is a cross-sectional structural diagram of the coal chute cleaning device according to one or more embodiments of the present invention, showing the removal of the coal chute portion. Figure 3 for Figure 2 A partially enlarged structural diagram of location A in the diagram; Figure 4 for Figure 3 A magnified schematic diagram of the structure at position B shown in the diagram. Figure 5 This is a schematic diagram of the drive component according to one or more embodiments of the present invention (exploded position of the limiting component). Figure 6 for Figure 5 A partially enlarged structural diagram of the structure at position C shown; The components represented by the various reference numerals in the diagram are: 1. Coal chute; 2. Drive assembly; 21. Motor; 22. Reducer; 23. Keyway; 24. Flange seat; 3. Connecting shaft; 31. Key block; 32. Baffle; 4. Limiting assembly; 41. Locking sleeve; 411. Protrusion; 42. Locking groove; 421. Vertical section; 422. Horizontal section; 43. Locking rod; 44. Support seat; 441. Fixing part; 442. Mounting part; 45. Limiting seat; 451. Recess; 5. Blade; 6. Buffer limiting mechanism; 61. Limiting rod; 62. Step groove; 63. Spring. Detailed Implementation

[0020] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] Example 1 In a typical embodiment of the present invention, such as Figures 1-6As shown, a coal chute cleaning device is proposed for cleaning the interior of a coal chute 1. The top of the coal chute 1 is sealed, and a feed inlet is provided on the side wall of the coal chute 1. The coal chute cleaning device includes a drive assembly 2, a connecting shaft 3, a limiting assembly 4, and blades 5. The drive assembly 2 is fixedly installed on the top of the coal chute 1. The connecting shaft 3 is vertically arranged inside the coal chute 1 and is coaxial with the coal chute 1. The top of the connecting shaft 3 passes upward through the top of the coal chute 1 and is keyed to the hollow output shaft of the drive assembly 2. A baffle 32 is fixedly provided on the connecting shaft 3. The baffle 32 is used to abut against the inner wall of the top of the coal chute 1 to limit the flow of the coal chute 1. The connecting shaft 3 is pulled upwards, and the blade 5 is fixedly installed on the outer wall of the connecting shaft 3. The blade 5 is used to scrape the coal material on the inner wall of the coal drop pipe 1 to prevent the coal drop pipe 1 from being blocked. The drive assembly 2 is used to drive the connecting shaft 3 to rotate around the shaft. The limiting assembly 4 is detachably installed on the top of the connecting shaft 3 to limit the downward movement of the connecting shaft 3. In conjunction with the setting of the baffle 32, the axial position of the connecting shaft 3 is effectively limited. When it is necessary to repair the connecting shaft 3 and the blade 5, the connecting shaft 3 can be removed simply by removing the limiting assembly 4 from the top of the drive assembly 2. There is no need to remove the drive assembly 2, which effectively improves the repair efficiency and reduces the repair cost.

[0022] The drive assembly 2 includes a motor 21 and a reducer 22. The output shaft of the motor 21 is connected to the input shaft of the reducer 22. The reducer 22 is a worm gear reducer, and its output shaft is a hollow shaft to allow the vertical passage of the connecting shaft 3. Utilizing the self-locking characteristic of the worm gear, when the motor 21 stops, the connecting shaft 3 will not rotate due to the impact of coal, thus affecting the coal feed rate. The blades 5 are preferably made of wear-resistant and erosion-resistant alloy steel, which has the characteristics of long service life. Figure 3 As shown, a keyway 23 is provided in the shaft hole of the output shaft of the reducer 22, and a key block 31 is fixed on the outer wall of the connecting shaft 3. The relative rotation between the connecting shaft 3 and the output shaft of the reducer 22 is restricted by the cooperation between the key block 31 and the keyway 23.

[0023] In this embodiment, there are several blades 5, which are fixedly arranged at intervals along the circumference of the connecting shaft 3. The blades 5 are fixedly connected to the connecting shaft 3 by several crossbars.

[0024] The outer wall of the connecting shaft 3 is also equipped with a shaft seal and a bearing, which are rotatably connected to the top shaft hole of the coal chute 1 through the shaft seal and the bearing. This not only provides a sealing function, but also reduces the rotational friction between the connecting shaft 3 and the coal chute 1.

[0025] like Figure 3 and Figure 5As shown, a flange seat 24 is fixedly installed on the top of the reducer 22 by bolts. The flange seat 24 is an annular structure with an opening at the top. The flange seat 24 is fixedly connected to the reducer 22 by bolts. The top end of the connecting shaft 3 passes through the reducer 22 and is placed inside the flange seat 24. The limiting component 4 is rotatably disposed inside the flange seat 24 and is detachably connected to the top end of the connecting shaft 3. The flange seat 24 is coaxially arranged with the connecting shaft 3 and the coal drop pipe 1. The top of the flange seat 24 is fixedly connected to the coal feeder by bolts to ensure the installation accuracy of the verticality and concentricity of the coal drop pipe 1.

[0026] The limiting assembly 4 includes a locking sleeve 41, a locking groove 42, a locking rod 43, a support base 44, and a limiting seat 45. The support base 44 is fixedly installed inside the flange seat 24 by bolts. The support base 44 is a ring-shaped structure. Figure 4 As shown, the support base 44 includes a fixing part 441 and a mounting part 442. The fixing part 441 is a plate-shaped structure with several bolt holes for fixing to the flange seat 24 by bolts. The mounting part 442 is a cylindrical structure and is welded and fixed to the fixing part 441. The top end of the connecting shaft 3 is located inside the mounting part 442. The limiting seat 45 is disposed inside the mounting part 442 and rotatably connected to the mounting part 442. The limiting seat 45 is a cylindrical structure with a vertically arranged recess 451 on its inner wall. The top end of the recess 451 penetrates the top of the inner wall of the limiting seat 45. The length of the recess 451 is less than the axial length of the limiting seat 45. The locking sleeve 41 is detachably installed inside the limiting seat 45. The outer wall of the locking sleeve 41... A protrusion 411 is fixedly provided on the upper part. The protrusion 411 is a vertically arranged protrusion. The length of the protrusion 411 is less than the length of the locking sleeve 41. Through the cooperation of the protrusion 411 and the recess 451, the relative rotation between the locking sleeve 41 and the limiting seat 45 is restricted. The locking sleeve 41 has a bottom opening structure. A locking groove 42 is opened on the side wall of the locking sleeve 41. The locking rod 43 is fixedly installed on the top outer wall of the connecting shaft 3. The top of the connecting shaft 3 is inserted into the locking sleeve 41, and the locking rod 43 is inserted into the locking groove 42. Through the cooperation of the locking rod 43 and the locking groove 42, the relative rotation between the locking sleeve 41 and the connecting shaft 3 is restricted. Thus, the locking sleeve 41 can be used to restrict the downward movement of the connecting shaft 3. With the cooperation of the baffle 32 on the connecting shaft 3, the axial position of the connecting shaft 3 can be effectively restricted.

[0027] It is understandable that both the flange seat 24 and the support seat 44 have holes with cross-sectional shapes that match the cross-sectional shape of the connecting shaft 3 at the location where the locking rod 43 is located, so as to facilitate the passage of the connecting shaft 3.

[0028] like Figure 6As shown, the locking groove 42 is an inverted L-shaped groove, which includes a vertical section 421 and a horizontal section 422. The locking groove 42 extends radially through the side wall of the locking sleeve 41, and the bottom end of the vertical section 421 of the locking groove 42 extends through the bottom of the side wall of the locking sleeve 41. The locking rod 43 is horizontally fixed on the outer wall of the connecting shaft 3. When the locking sleeve 41 is fastened to the top of the connecting shaft 3, the locking rod 43 enters the locking groove 42 through the vertical section 421 of the locking groove 42. By rotating the locking sleeve 41, the locking rod 43 is moved into the horizontal section 422 of the locking groove 42, thereby realizing the quick connection and limiting between the locking sleeve 41 and the connecting shaft 3. The limiting seat 45 can limit the rotation of the locking sleeve 41 around the axis, thereby preventing the automatic unlocking between the locking sleeve 41 and the connecting shaft 3.

[0029] It should be noted that one end of the horizontal section 422 is connected to the vertical section 421, and the other end is a closed end. The extension direction of the closed end of the horizontal section 422 is the same as the rotation direction of the connecting shaft 3 around the shaft, so as to prevent the connecting shaft 3 from automatically separating from the locking sleeve 41 during the rotation process.

[0030] In this embodiment, at least one locking groove 42 is provided. When several locking grooves 42 are provided, the locking grooves 42 are spaced apart along the circumference of the locking sleeve 41. The number of locking rods 43 is the same as the number of locking grooves 42. The axial length of the locking rods 43 is the same as the wall thickness of the locking sleeve 41, and the end face of the locking rods 43 is flush with the surface of the key block 31 to facilitate the pulling out of the connecting shaft 3.

[0031] During the coal feeding process, the coal continuously impacts the blades 5, exerting a downward pulling force on the connecting shaft 3. To reduce damage to the connecting shaft 3, a buffer limiting mechanism 6 is provided between the support base 44 and the limiting base 45. Figure 4 As shown, the buffer limiting mechanism 6 includes a limiting rod 61, a stepped groove 62, and a spring 63. The stepped groove 62 is formed in the side wall of the limiting seat 45 and extends circumferentially along the limiting seat 45. The bottom of the stepped groove 62 penetrates the bottom of the side wall of the limiting seat 45, and the inner diameter of the bottom of the stepped groove 62 is smaller than its top. Several limiting rods 61 are provided and are vertically fixed in the support seat 44. Several limiting rods 61 are spaced apart circumferentially along the support seat 44. The limiting rods 61 have a T-shaped structure and are inserted into the stepped groove 62. The spring 63 is sleeved on the limiting rod 61 and is located between the limiting seat 45 and the support seat 44. When the connecting shaft 3 rotates around the shaft, it drives the locking sleeve 41 and the limiting seat 45 to rotate synchronously around the shaft to perform cleaning work. The impact of the coal is buffered by the spring 63.

[0032] In this embodiment, the limiting rod 61 includes a rod part and a head. The diameter of the head is larger than that of the rod part. The head is located in the stepped groove 62 of the limiting seat 45. The head is detachably connected to the rod part by a threaded connection.

[0033] Example 2 In another typical embodiment of the present invention, a disassembly and assembly method is proposed for the disassembly and assembly of the coal chute cleaning device mentioned in Embodiment 1. The disassembly and assembly method includes: When it is necessary to disassemble the connecting shaft 3, manually press down on the limiting seat 45 to compress the spring 63, so that the protrusion 411 on the outer wall of the locking sleeve 41 separates from the recess 451 on the inner wall of the limiting seat 45. Then rotate the locking sleeve 41 so that the locking rod 43 on the outer wall of the connecting shaft 3 moves from the horizontal section 422 to the vertical section 421. Pull the locking sleeve 41 upward so that the locking rod 43 separates from the locking groove 42, and release the connection limit between the locking sleeve 41 and the connecting shaft 3. After removing the locking sleeve 41, pull the connecting shaft 3 directly downward from the feed inlet on the side wall of the coal chute 1 to separate the connecting shaft 3 from the output shaft of the reducer 22, thereby completing the quick disassembly of the connecting shaft 3.

[0034] When installing the connecting shaft 3, install the connecting shaft 3 inside the coal chute 1, so that the top end of the connecting shaft 3 passes through the top end of the coal chute 1, the flange seat 24 and the support seat 44 in sequence, and inserts the top end of the connecting shaft 3 into the limiting seat 45. Fasten the locking sleeve 41 onto the top end of the connecting shaft 3, and the locking rod 43 enters the vertical section 421 of the locking groove 42. Then rotate the locking sleeve 41 so that the locking rod 43 moves into the horizontal section 422 of the locking groove 42 to complete the connection between the locking sleeve 41 and the connecting shaft 3. Rotate the limiting seat 45 so that the protrusion 411 on the outer wall of the locking sleeve 41 inserts into the recess 451 on the inner wall of the limiting seat 45 to complete the connection between the locking sleeve 41 and the limiting seat 45. The limiting seat 45 exerts upward force under the action of the spring 63, and the connecting shaft 3 exerts downward force under the action of gravity. Through the cooperation of the locking sleeve 41 and the baffle 32, the position of the connecting shaft 3 is limited. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coal chute cleaning device for cleaning the inside of a coal chute (1), wherein the top of the coal chute (1) is sealed, and a feed inlet is provided on the side wall of the coal chute (1), characterized in that, It includes a motor (21) and a reducer (22) that can be fixedly installed on the top of the coal chute (1), the reducer (22) being a worm gear reducer; it also includes a connecting shaft (3) set inside the coal chute (1), a blade (5) fixedly provided on the connecting shaft (3), the top end of the connecting shaft (3) passing upward through the coal chute (1) and connected to the hollow output shaft of the reducer (22), a baffle (32) fixedly provided on the connecting shaft (3), the baffle (32) being used to abut against the inner wall of the top end of the coal chute (1), and a limit component (4) being detachably installed on the top end of the connecting shaft (3), the limit component (4) being used to restrict the downward movement of the connecting shaft (3).

2. The coal chute cleaning device according to claim 1, characterized in that, A flange seat (24) is fixedly installed on the top of the reducer (22). The top of the flange seat (24) is open. The top of the connecting shaft (3) passes through the reducer (22) and is placed inside the flange seat (24). The limiting component (4) is rotatably set inside the flange seat (24) and is detachably connected to the top of the connecting shaft (3). The flange seat (24) is used to be fixedly connected to the coal feeder.

3. The coal chute cleaning device according to claim 1, characterized in that, The limiting assembly (4) includes a locking sleeve (41), a support seat (44) and a limiting seat (45). The support seat (44) is fixedly installed in the flange seat (24). The support seat (44) is an annular seat structure. The limiting seat (45) is rotatably installed in the support seat (44). The limiting seat (45) is a cylindrical structure. A vertically arranged recess (451) is provided on the inner wall of the limiting seat (45). The locking sleeve (41) is detachably installed in the limiting seat (45). A protrusion (411) is fixedly provided on the outer wall of the locking sleeve (41). The protrusion (411) is used to be inserted into the recess (451). A locking groove (42) is provided on the side wall of the locking sleeve (41). A locking rod (43) is fixedly provided on the outer wall of the top end of the connecting shaft (3). The top end of the connecting shaft (3) is inserted into the locking sleeve (41), and the locking rod (43) is inserted into the locking groove (42).

4. The coal chute cleaning device according to claim 3, characterized in that, The locking groove (42) is an inverted L-shaped groove. The locking groove (42) includes a vertical section (421) and a horizontal section (422). The locking groove (42) penetrates the side wall of the locking sleeve (41) radially as a whole. The bottom end of the vertical section (421) penetrates the bottom of the side wall of the locking sleeve (41).

5. The coal chute cleaning device according to claim 3, characterized in that, The axis of the locking rod (43) is perpendicular to the axis of the connecting shaft (3), and the length of the locking rod (43) is the same as the wall thickness of the locking sleeve (41).

6. The coal chute cleaning device according to claim 3, characterized in that, The top of the recess (451) penetrates the top of the inner wall of the limiting seat (45), and the length of the recess (451) is less than the length of the limiting seat (45); the length of the protrusion (411) is less than the length of the locking sleeve (41).

7. The coal chute cleaning device according to claim 3, characterized in that, A buffer limiting mechanism (6) is provided between the support base (44) and the limiting base (45). The buffer limiting mechanism (6) includes several limiting rods (61) fixedly arranged at intervals along the circumference. The limiting rods (61) are T-shaped structures. A stepped groove (62) is opened in the side wall of the limiting base (45). The stepped groove (62) extends along the circumference of the limiting base (45). The limiting rods (61) are vertically inserted into the stepped groove (62). A spring (63) is sleeved on the limiting rods (61). The spring (63) is located between the limiting base (45) and the support base (44).

8. The coal chute cleaning device according to claim 4, characterized in that, The direction of extension of the closed end of the horizontal segment (422) is the same as the direction of rotation of the connecting shaft (3) around the shaft.

9. A method for disassembling and assembling the coal chute cleaning device as described in any one of claims 3-8, characterized in that, include: When disassembling the connecting shaft (3), manually press down on the limiting seat (45) to separate the protrusion (411) from the recess (451), then rotate the locking sleeve (41) and pull it up to unlock and separate the locking rod (43) from the locking groove (42); After removing the locking sleeve (41), pull the connecting shaft (3) directly downward from the feed port on the side wall of the coal chute (1) to separate the connecting shaft (3) from the output shaft of the reducer (22).

10. The disassembly and assembly method according to claim 9, characterized in that, When installing the connecting shaft (3), install the connecting shaft (3) inside the coal chute (1) so that the top end of the connecting shaft (3) passes through the coal chute (1), flange seat (24) and support seat (44) in sequence. Fasten the locking sleeve (41) on the top end of the connecting shaft (3), rotate the locking sleeve (41) so that the locking rod (43) is inserted into the locking groove (42); then rotate the limiting seat (45) so that the protrusion (411) is inserted into the recess (451).

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