A clogged device for a silo pump ash pipeline
By introducing a multi-dimensional adjustable nozzle system and sealing device into the ash conveying pipeline of the silo pump, the problems of low cleaning efficiency, numerous blind spots, and contamination of transmission components in the existing technology have been solved, achieving all-round cleaning and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANYANG RUIMEIDA CLEAN ENERGY CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-12
Smart Images
Figure CN224349922U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pipeline cleaning, and in particular to a purging device for ash conveying pipelines of silo pumps. Background Technology
[0002] In industrial production, silo pump conveying systems are an important application of pneumatic conveying technology, widely used in the power, metallurgy, and chemical industries for conveying granular materials such as fly ash and slag. This system uses compressed air to propel the ash particles through the pipeline. However, due to the viscosity of the ash particles, flow velocity fluctuations during transport, and abrupt changes in the flow field at pipe bends, ash accumulation and blockage can easily occur at bends, severely impacting production continuity and potentially causing safety accidents due to sudden pressure increases within the pipeline.
[0003] However, current ash conveying pipeline clogging technologies have the following main shortcomings: First, manual cleaning: Traditional methods for handling blockages mostly involve manually disassembling the pipeline for cleaning, which is not only labor-intensive and inefficient but also requires interrupting the production process, resulting in downtime losses. Second, fixed clogging devices: Some existing technologies use fixed nozzle clogging structures, and the nozzle position cannot be adjusted. Since the blockage location of elbows is random (it may be located at the top, bottom, or different depths), fixed nozzles can only clean local areas, resulting in blind spots and poor actual clogging effect. Third, transmission components are easily contaminated: Existing clogging devices with drive structures lack effective sealing protection, and dust in the ash conveying environment easily adheres to the surface of the motor, gears, or racks, leading to transmission jamming and accelerated wear. Fourth, single air jet mode: Most devices only jet air in one direction (such as axial direct blowing), which is difficult to achieve all-round impact for highly adhesive ash accumulation, resulting in poor cleaning effect on ash accumulation in the inner corners of elbows and easy re-clogging. Fifth, the air pressure utilization rate is low: the sliding connection parts of some devices are not well sealed, the compressed gas leakage rate is high, resulting in insufficient actual jet pressure, which cannot effectively blow away the hard dust layer.
[0004] Therefore, there is an urgent need for a new type of purging device for ash conveying pipelines in silo pumps. Utility Model Content
[0005] The purpose of this utility model is to solve the problems of low working efficiency, non-adjustable blotting device, easy contamination of structure, single jet mode and low air pressure utilization in the existing technology, and propose a blotting device for ash conveying pipeline of silo pump.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a blow-blocking device for a silo pump ash conveying pipeline, comprising an elbow, a sliding pipe A, a sliding pipe B, a rotating device, and a nozzle, characterized in that the elbow comprises a vertical section and a horizontal section that are perpendicular to each other, the vertical section of the elbow is fitted inside the sliding pipe A and the two form a sliding structure, the sliding pipe B is fitted inside the horizontal section of the elbow and the two form a sliding structure, and the rotating device is disposed at the top of the sliding pipe A.
[0007] Preferably, the sliding pipe A and the horizontal section of the elbow are provided with two identical annular blocks symmetrically along their circumference on their inner surfaces, and the vertical section of the elbow and the sliding pipe B are provided with two identical annular blocks symmetrically along their circumference on their outer surfaces.
[0008] Preferably, the four annular blocks of the sliding pipe A and the vertical section of the elbow are combined to form a complete ring, and the inner diameter of the complete ring matches the outer diameter of the vertical section of the elbow. The four annular blocks of the horizontal section of the elbow and the sliding pipe B are combined to form a complete ring, and the inner diameter of the complete ring matches the outer diameter of the sliding pipe B.
[0009] Preferably, a rack is provided on an annular stop on the outer surface of the vertical section of the elbow and the sliding tube B. The height of the rack teeth matches the outer diameter of the annular stop. A rotary motor is fixed on the outer surface of both the sliding tube A and the horizontal section of the elbow. A worm is fixed on the output shaft of the rotary motor, and the worm meshes with the rack.
[0010] Preferably, a sealing device is provided on the outside of the sliding pipe A and the vertical section of the elbow, and on the outside of the sliding pipe B and the horizontal section of the elbow; the sealing device includes a portal frame and a portal sliding frame; the portal sliding frame is located inside the portal frame and the two match each other to form a sliding connection structure.
[0011] Preferably, the gantry frame is fixed directly above the rotary motor of the sliding tube A and the horizontal section of the bend, and the gantry sliding frame is set directly above the rack of the vertical section of the bend and the sliding tube B. Both ends of the gantry sliding frame are provided with a baffle with the same width and height as the gantry frame, and one of the baffles is fixed to the exposed end of the rack of the vertical section of the bend and the sliding tube B.
[0012] Preferably, the rotating device includes a bearing housing, a ratchet disc, and a motor; the bearing housing is disposed on the top of the sliding tube, and the sliding tube rotates within the bearing housing; the ratchet disc is coaxially fixed to the outer surface of the sliding tube and located at the upper end of the bearing housing, and the outer edge of the ratchet disc is provided with a plurality of meshing grooves along its circumference; a fixed disc is vertically fixed to the output shaft of the motor, and a rotating positioning block is vertically fixed to the edge of the fixed disc, the rotating positioning block matching the meshing grooves.
[0013] Preferably, the outer surface of the nozzle has a plurality of circular holes evenly distributed thereon, one end of which is fixed to the end of the sliding tube B, and the other end is provided with a cover. The cover is rotatably connected to the nozzle through a damping shaft at the top of the nozzle.
[0014] Compared with the prior art, the present invention has the following beneficial effects.
[0015] 1. The device utilizes a dual sliding structure and a rotating mechanism to achieve vertical, horizontal, and 360° rotation adjustment of the nozzle. The sliding engagement between the vertical section of the elbow and sliding pipe A allows the nozzle to move vertically to accommodate dust accumulation at different heights; the sliding engagement between sliding pipe B and the horizontal section of the elbow allows the nozzle to move horizontally to cover areas with varying depths of blockage; the rotating mechanism causes the nozzle to rotate around its central axis, achieving 360° cleaning without blind spots. Compared to a fixed nozzle, the cleaning range is expanded to the entire elbow area, eliminating blind spots.
[0016] 2. The sliding tube and elbow are equipped with a sealing device consisting of a gantry frame, a gantry sliding bracket, and a baffle, which can completely cover the rotating motor, worm gear, and rack to prevent dust from adhering. At the same time, the gantry sliding bracket moves synchronously with the components, always maintaining a sealed state, thus solving the problem of dust contamination caused by traditional devices.
[0017] 3. The nozzle surface is covered with evenly distributed round holes, which can form a ring-shaped air jet to impact the inner wall of the elbow from all directions. The end cover is connected by a damping shaft. During normal cleaning, the cover is closed, and the air pressure is concentrated in the round holes for air jet. When the blockage is severe, the air pump power is increased to make the air pressure exceed the damping threshold, the cover is lifted, and a strong axial airflow is formed to blow directly into the core blockage area. The combination of dual modes improves the cleaning efficiency of adhesive ash, and the round hole design can spray the ash entering the nozzle in the opposite direction to achieve self-cleaning and avoid nozzle blockage.
[0018] 4. Sliding pipe A and the vertical section of the elbow are combined into a complete ring by four annular blocks, and sliding pipe B and the horizontal section of the elbow are combined into a complete ring by four annular blocks, ensuring both smooth sliding and a tight seal. Simultaneously, the cross-sectional areas of sliding pipe A, the elbow, sliding pipe B, and the nozzle decrease sequentially, and the compressed gas pressure increases progressively. The actual gas pressure at the nozzle is higher than in traditional devices, effectively dispersing hardened dust layers.
[0019] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural diagram of the installation of the ash conveying elbow of this utility model.
[0021] Figure 2 This is a three-dimensional structural diagram of the present invention.
[0022] Figure 3 This is a top view of the present invention.
[0023] Figure 4 This is a three-dimensional structural diagram of the present invention (excluding the sealing device and the rotating device).
[0024] Figure 5 for Figure 4 The main view.
[0025] Figure 6 for Figure 5 The left view.
[0026] Figure 7 for Figure 5 Top view
[0027] Figure 8 for Figure 5 Sectional view of AA.
[0028] Figure 9 for Figure 7 BB section view.
[0029] Figure 10 This is a three-dimensional structural diagram of the sealing device.
[0030] In the diagram: 1. Elbow; 101. Vertical section of elbow; 102. Horizontal section of elbow; 2. Sliding pipe A; 3. Annular stop; 4. Sliding pipe B; 5. Rotating device; 501. Bearing seat; 502. Ratchet; 503. Motor; 504. Rotating positioning block; 505. Meshing groove; 6. Rack; 7. Worm; 8. Rotary motor; 9. Nozzle; 901. Cover; 902. Damping shaft; 10. Sealing device; 1001. Portal frame; 1002. Portal sliding frame; 1003. Baffle; 11. Ash conveying elbow; 12. Flange connection pipe. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0032] Reference Figure 1-10A purging device for a silo pump ash conveying pipeline includes an elbow 1, a sliding pipe A 2, a sliding pipe B 4, a rotating device 5, and a nozzle 9. The elbow 1 comprises a vertical section 101 and a horizontal section 102 that are perpendicular to each other. The vertical section 101 is fitted inside the sliding pipe A 2, forming a sliding structure. The sliding pipe B 4 is fitted inside the horizontal section 102, also forming a sliding structure. The rotating device 5 is located at the top of the sliding pipe A 2. The sliding pipe A 2 is fixed to the flange connection pipe 12 of the ash conveying elbow 11, with its bottom end located inside the elbow 11 and its other end extending out of the flange connection pipe 12. Figure 1 As shown, the end is connected to an air pump via a hose (not shown in this embodiment). Compressed gas passes through sliding pipe A 2, elbow 1, and sliding pipe B 4, and is finally ejected from the conical nozzle 9 to blow away the coal dust and ash accumulated inside elbow 1. Furthermore, the decreasing cross-sectional area of the four components continuously increases the pressure of the compressed gas, thus improving the cleaning effect.
[0033] The sliding pipe A 2 and the horizontal section 102 of the elbow are symmetrically provided with two identical annular blocks 3 on their inner surfaces along their circumference. The vertical section 101 of the elbow and the sliding pipe B 4 are symmetrically provided with two identical annular blocks 3 on their outer surfaces along their circumference. The four annular blocks 3 of the sliding pipe A 2 and the vertical section 101 of the elbow are combined to form a complete ring, and the inner diameter of the complete ring matches the outer diameter of the vertical section 101 of the elbow. Similarly, the four annular blocks 3 of the horizontal section 102 of the elbow and the sliding pipe B 4 are combined to form a complete ring, and the inner diameter of the complete ring matches the outer diameter of the sliding pipe B 4. The four annular blocks 3 serve three purposes: first, to ensure that the vertical section 101 of the elbow can slide within the sliding tube A 2 and the sliding tube B 4 within the horizontal section 102 of the elbow; second, to limit the movement of the vertical section 101 of the elbow within the sliding tube A 2 and the sliding tube B 4 within the horizontal section 102 of the elbow; and third, to form a complete ring that ensures the seal between the two, preventing the compressed gas from leaking.
[0034] A rack 6 is provided on an annular stop 3 on the outer surface of the vertical section 101 of the elbow and the sliding tube 4. The tooth height of the rack 6 matches the outer diameter of the annular stop 3. A rotary motor 8 is fixed on the outer surface of both the sliding tube 2 and the horizontal section 102 of the elbow. A worm 7 is fixed on the output shaft of the rotary motor 8, and the worm 7 meshes with the rack 6. The rotary motor 8 rotates forward and backward, driving the worm 7 to rotate forward and backward, and the rack 6 meshing with the worm 7 moves, achieving the effect of the vertical section 101 of the elbow sliding up and down in the sliding tube 2, so that the nozzle 9 rises or falls in the ash conveying elbow 11; achieving the effect of the sliding tube 4 sliding horizontally back and forth in the horizontal section 102 of the elbow, so that the nozzle 9 moves forward or backward in the ash conveying elbow 11 relative to the cleaning area. Because the diameter of the ash conveying elbow 11 is large, the height and linear distance of the coal dust clogging the ash conveying elbow 11 are also different. This adjustment helps the nozzle 9 to clean coal dust of different heights and depths.
[0035] A sealing device 10 is provided on the outside of the sliding pipe A 2 and the vertical section 101 of the elbow, and on the outside of the sliding pipe B 4 and the horizontal section 102 of the elbow. The sealing device 10 includes a portal frame 1001 and a portal sliding frame 1002. The portal sliding frame 1002 is located inside the portal frame 1001, and the two match each other to form a sliding connection structure. The portal frame 1001 is fixed directly above the rotary motor 8 of the sliding pipe A 2 and the horizontal section 102 of the elbow, and the portal sliding frame 1002 is located directly above the rack 6 of the vertical section 101 of the elbow and the sliding pipe B 4. Each end of the portal sliding frame 1002 is provided with a baffle 1003 with the same width and height as the portal frame 1001, and one of the baffles 1003 is fixed to the exposed end of the rack 6 of the vertical section 101 of the elbow and the sliding pipe B 4. Because the rotary motor 8 and rack 6 operate in a dusty environment, a sealing device 10 is installed to prevent dust from accumulating on them and affecting their normal operation. The gantry frame 1001 is fixed to the sliding tube A 2, and the gantry sliding frame 1002 is slidably connected to both the vertical section 101 of the bend and the sliding tube A 2. Baffles 1003 at both ends ensure the structural seal at both ends and can be connected by adhesive. When the vertical section 101 of the bend and the sliding tube B 4 slide, the gantry sliding frame 1002 slides within the gantry frame 1001, completely covering the rotary motor 8 and rack 6 to ensure a tight seal.
[0036] The rotating device 5 includes a bearing seat 501, a ratchet disc 502, and a motor 503. The bearing seat 501 is disposed on the top of the sliding tube A 2, and the sliding tube A 2 rotates within the bearing seat 501. The ratchet disc 502 is coaxially fixed to the outer surface of the sliding tube A 2 and located at the upper end of the bearing seat 501. The outer edge of the ratchet disc 502 is provided with a plurality of meshing grooves 505 along its circumferential direction. The output shaft of the motor 503 is vertically fixed to a fixed disc, and a rotating positioning block 504 is vertically fixed to the edge of the fixed disc. The rotating positioning block 504 matches the meshing grooves 505. The bearing housing and motor are fixed on the flange connecting pipe, and the upper surface of the ratchet disc 502 is a certain distance from the top of the sliding tube A2 so that the sliding tube A2 can be connected to the air pump via a hose. When the motor 503 is started, the rotating positioning block 504 rotates with the motor 503. During the rotation, it will automatically engage the engagement groove 505. When the rotating positioning block 504 engages into the engagement groove 505, it continues to rotate in the engagement groove 505 to make the sliding tube A2 rotate. When it disengages from one engagement groove 505, the sliding tube A2 stops rotating until it engages into the next engagement groove 505. The purpose of this design is threefold: first, it allows the nozzle 9 to rotate around the central axis of the sliding tube A2 in the ash conveying pipe, so that the nozzle 9 can clean 360° without dead angles in the ash conveying pipe; second, it can perform an automatic cleaning mode of rotation-stop-rotation; and third, it can stop the motor rotation after the nozzle 9 rotates to a certain angle and stop to perform fixed-point cleaning at that position. This invention achieves multi-dimensional nozzle adjustment through a dual sliding structure and a rotating device: the sliding engagement between the vertical section of the elbow and sliding pipe A, driven by a rotary motor, worm gear, and rack, allows the nozzle to move up and down to accommodate ash accumulation at different heights; the sliding engagement between sliding pipe B and the horizontal section of the elbow, driven by the same mechanism, allows the nozzle to move back and forth, covering blockage areas of varying depths; the rotating device enables the nozzle 9 to clean ash conveying pipes 360° without blind spots. Compared to a fixed nozzle, the cleaning range is expanded to the entire elbow area, eliminating blind spots.
[0037] The nozzle 9 has several evenly distributed circular holes on its outer surface. Compressed gas is ejected from these holes, resulting in a larger working area and stronger air pressure, which helps improve the cleaning effect. One end of the nozzle is fixed to the end of the sliding tube 4, and the other end is equipped with a cover 901. The cover 901 is rotatably connected to the nozzle 9 via a damping shaft 902 at the top of the nozzle 9. Under normal circumstances, when the gas pressure acting on the cover 901 does not reach the threshold of the damping shaft 902, the damping shaft 902 causes the cover 901 to block the nozzle 9. When a larger direct gas flow is required, the air pump can increase its output power, increasing the gas pressure to exceed the threshold of the damping shaft 902. The cover 901 is lifted, and strong compressed gas is ejected from the end of the nozzle 9. The strong pressure is used to clean the coal dust and ash accumulation, especially greatly improving the cleaning efficiency of adhesive ash. In addition, this function will also eject the coal dust and ash that enters the nozzle 9 through the round hole to achieve the effect of cleaning the nozzle 9. The nozzle 9 is also equipped with a lighting device and a camera to observe the internal situation.
[0038] Working process: After connecting all components or structures of this utility model, ensure sealing. Fix sliding pipe A2 to the flange connection pipe 12 of the ash conveying elbow 11. Connect the other end of sliding pipe A2 to the air pump through a hose. Ensure that the vertical section 101 of the elbow is fitted inside sliding pipe A2 and sliding pipe B4 is fitted inside the horizontal section 102 of the elbow. Ensure that the combination of each annular stop block is well sealed and that the sealing device 10 covers the transmission components. Start the air pump. Compressed gas is delivered to the nozzle 9 in sequence through sliding pipe A2, elbow 1, and sliding pipe B4. At this time, the air pressure does not exceed the threshold of the damping shaft 902. The cover 901 is closed, and the gas is ejected from the round hole on the surface of the nozzle 9, initially cleaning the loose ash inside the ash conveying elbow 11. Based on the location of the blockage in the ash conveying elbow 11, the corresponding rotary motor 8 is activated: if the blockage is located at the top or bottom, the rotary motor 8 outside the sliding tube A 2 is controlled to rotate forward and backward, driving the vertical section 101 of the elbow to slide up and down through the meshing of the worm gear 7 and rack 6, adjusting the height of the nozzle 9; if the blockage is located deep or shallow, the rotary motor 8 outside the horizontal section 102 of the elbow is controlled to rotate forward and backward, driving the sliding tube B 4 to slide back and forth through the meshing of the worm gear 7 and rack 6, adjusting the depth of the nozzle 9. The rotating device allows the nozzle 9 to rotate around the central axis of the sliding tube A 2 inside the ash conveying pipe. This design allows the nozzle 9 to clean 360° without dead angles inside the ash conveying pipe; secondly, it can perform an automatic cleaning mode of rotation-stop-rotation; and thirdly, it can stop the motor rotation after the nozzle 9 rotates to a certain angle and stop to clean the fixed position. The three functions work together to clean the blockage in different locations of the ash conveying elbow 11. During the adjustment process, the portal sliding frame 1002 of the sealing device 10 slides synchronously with the components to maintain the seal of the transmission system. If a hard or sticky blockage is encountered, the air pump output power is increased, causing the air pressure inside the nozzle 9 to exceed the threshold of the damping shaft 902. The cover 901 then lifts around the damping shaft 902, allowing a powerful airflow to blow directly into the core area of the blockage from the end of the nozzle 9. This, combined with the annular jet from the circular orifice, achieves comprehensive cleaning. After cleaning, the air pump power is reduced, and the cover 901 resets and closes under damping. The rotary motor 8 is then controlled to return the nozzle 9 to its initial position, and the air pump is turned off, completing the blockage removal operation.
[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
Claims
1. A purging device for a silo pump ash conveying pipeline, comprising an elbow (1), sliding pipe A (2), sliding pipe B (4), a rotating device (5), and a nozzle (9), characterized in that, The elbow (1) includes a vertical section (101) and a horizontal section (102) that are perpendicular to each other. The vertical section (101) is fitted inside the sliding tube A (2) and the two form a sliding structure. The sliding tube B (4) is fitted inside the horizontal section (102) and the two form a sliding structure. The rotating device (5) is set on the top of the sliding tube A (2).
2. The purging device for a silo pump ash conveying pipeline according to claim 1, characterized in that, The sliding pipe A (2) and the horizontal section of the elbow (102) are provided with two identical annular blocks (3) symmetrically along their circumference on their inner surfaces, and the vertical section of the elbow (101) and the sliding pipe B (4) are provided with two identical annular blocks (3) symmetrically along their circumference on their outer surfaces.
3. The purging device for a silo pump ash conveying pipeline according to claim 2, characterized in that, The four annular blocks (3) of the sliding tube A (2) and the vertical section (101) of the elbow are combined to form a complete ring, and the inner diameter of the complete ring matches the outer diameter of the vertical section (101) of the elbow. The four annular blocks (3) of the horizontal section (102) of the elbow and the sliding tube B (4) are combined to form a complete ring, and the inner diameter of the complete ring matches the outer diameter of the sliding tube B (4).
4. The purging device for a silo pump ash conveying pipeline according to claim 3, characterized in that, A rack (6) is provided on an annular stop (3) on the outer surface of the vertical section (101) of the elbow and the sliding tube (4). The tooth height of the rack (6) matches the outer diameter of the annular stop (3). A rotary motor (8) is fixed on the outer surface of both the sliding tube (2) and the horizontal section (102) of the elbow. A worm (7) is fixed on the output shaft of the rotary motor (8). The worm (7) meshes with the rack (6).
5. The purging device for a silo pump ash conveying pipeline according to claim 4, characterized in that, A sealing device (10) is provided on the outside of the sliding pipe A (2) and the vertical section (101) of the elbow, and on the outside of the sliding pipe B (4) and the horizontal section (102) of the elbow; the sealing device (10) includes a gantry frame (1001) and a gantry sliding frame (1002); the gantry sliding frame (1002) is located inside the gantry frame (1001), and the two match each other to form a sliding connection structure.
6. The purging device for a silo pump ash conveying pipeline according to claim 5, characterized in that, The portal frame (1001) is fixed directly above the rotary motor (8) of the sliding tube A (2) and the horizontal section of the bend (102). The portal sliding frame (1002) is located directly above the rack (6) of the vertical section of the bend (101) and the sliding tube B (4). Both ends of the portal sliding frame (1002) are provided with a baffle (1003) with the same width and height as the portal frame (1001). One of the baffles (1003) is fixed to the exposed end of the rack (6) of the vertical section of the bend (101) and the sliding tube B (4).
7. The purging device for a silo pump ash conveying pipeline according to claim 1, characterized in that, The rotating device (5) includes a bearing seat (501), a ratchet disc (502), and a motor (503); the bearing seat (501) is located on the top of the sliding tube (2), and the sliding tube (2) rotates inside the bearing seat (501); the ratchet disc (502) is coaxially fixed on the outer surface of the sliding tube (2) and located at the upper end of the bearing seat (501), and the outer edge of the ratchet disc (502) is provided with several meshing grooves (505) along its circumferential direction; the output shaft of the motor (503) is vertically fixed with a fixed disc, and a rotating positioning block (504) is vertically fixed on the edge of the fixed disc, and the rotating positioning block (504) matches the meshing groove (505).
8. The purging device for a silo pump ash conveying pipeline according to claim 1, characterized in that, The nozzle (9) has several round holes evenly distributed on its outer surface. One end of the nozzle is fixed to the end of the sliding tube (4), and the other end is provided with a cover (901). The cover (901) is rotatably connected to the nozzle (9) through the damping shaft (902) at the top of the nozzle (9).