Stable cement delivery structure and method of cement delivery control

Abstract

This invention provides a stable ash conveying structure and ash conveying control method, including an ash conveying cylinder comprising an ash-falling buffer section, a steady-flow conveying section, and a pressure-bearing sealing section. The ash-falling buffer section is integrally formed into a gradually tapered frustum shape, with spiral guide ribs evenly distributed and integrally formed on its inner wall, and air nozzles evenly distributed on its inner side. The steady-flow conveying section is fixedly connected to the ash-falling buffer section, with raised strips evenly distributed and integrally formed on its inner wall, a pressure sensor installed on its inner wall, and a vibration sensor installed on its outer side. The ash-falling buffer section of this invention adopts a gradually tapered frustum shape design that is narrower at the top and wider at the bottom, combined with spiral guide ribs with precise parameters and tangentially guided annular anti-clogging air nozzles, forcing the ash material to fall spirally, dispersing the accumulated stress, and combined with linkage control by a material level sensor, significantly reducing the clogging rate and avoiding downtime losses caused by manual clogging.

Description

Technical Field

[0001] This invention relates to a stable ash conveying structure and ash conveying control method, belonging to the field of ash conveying technology. Background Technology

[0002] In industries such as thermal power, building materials, and metallurgy, dry ash conveying is a crucial link. Among them, the ash conveying structure is the core component that ensures continuous material conveying, and its stability is directly related to production efficiency and operational safety. However, there are some key problems with the ash conveying structures currently on the market. In terms of the design of the ash collection section, straight cylindrical or single-angle designs are often used, lacking effective flow guidance measures. This design makes it easy for ash to accumulate inside the equipment and form a so-called bridging phenomenon, which in turn causes blockage. To prevent blockage, existing anti-blockage measures often rely on system-level purging, but this is usually ineffective and cannot fundamentally solve the blockage problem. Secondly, in the treatment of the steady flow conveying section, these areas are mostly designed uniformly without reasonable reinforcement structures, and these areas are prone to local deformation under high pressure. More importantly, the inner wall does not have a special flow stabilization design, which causes the ash to flow turbulently during the conveying process, which not only reduces the conveying efficiency but may also cause additional wear and tear on the equipment. To address the aforementioned technical issues, a stable ash conveying structure and ash conveying control method are proposed. Summary of the Invention

[0003] In view of this, the present invention provides a stable ash conveying structure and ash conveying control method to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0004] The technical solution of the present invention is implemented as follows: a stable ash conveying structure, including an ash conveying cylinder, wherein the ash conveying cylinder includes an ash drop buffer section, a flow stabilizing conveying section and a pressure-bearing sealing section; The ash-falling buffer section is integrally formed into a gradually tapered frustum shape. Spiral guide ribs are integrally formed and distributed at equal intervals on the inner wall of the ash-falling buffer section. Air nozzles are installed at equal intervals on the inner side of the ash-falling buffer section. One end of the air nozzle is connected to an airflow interface. Material level sensors are installed at equal intervals inside the ash-falling buffer section. The flow stabilizing conveying section is fixedly connected to the ash falling buffer section. The inner wall of the flow stabilizing conveying section has integrally formed raised strips distributed at equal intervals. A pressure sensor is installed on the inner wall of the flow stabilizing conveying section, and a vibration sensor is installed on the outer side of the flow stabilizing conveying section.

[0005] More preferably, the pressure-bearing sealing section is fixedly connected to the flow-stabilizing conveying section, one end of the pressure-bearing sealing section is integrally formed with a flange, one side of the flange is provided with a gasket, one side of the pressure-bearing sealing section is integrally formed with a rigid sealing ring, one side of the rigid sealing ring is installed with an elastic sealing gasket, and a leakage sensor is installed on the inner wall of the pressure-bearing sealing section.

[0006] More preferably, a support member is installed at the bottom of the ash conveying cylinder. The support member includes a base, a shock-absorbing support, a support seat, and a support frame. The shock-absorbing support is symmetrically installed on the top of the base. The support seat is installed on the top of the shock-absorbing support. The support frame is fixedly connected to the top of the support seat and is fixedly connected to the ash conveying cylinder.

[0007] More preferably, annular reinforcing ribs are fixedly connected to the outer side of the steady flow conveying section, the spacing of the annular reinforcing ribs is 1.2-1.5 times the diameter of the steady flow conveying section cylinder, and the thickness of the annular reinforcing ribs is 1.5-2 times the wall thickness of the steady flow conveying section cylinder.

[0008] More preferably, the ash-falling buffer section is a gradually tapered frustum shape, narrower at the top and wider at the bottom, with a cone angle of 35°-40°. The spiral guide rib extends spirally downward along the inner wall of the ash-falling buffer section, with a spiral rise angle of 18°-22°. The spiral guide rib protrudes 5-8mm from the inner wall of the ash-falling buffer section, and the spiral guide rib has anti-slip teeth 0.5mm deep on the side facing the ash flow.

[0009] More preferably, the air nozzle is an annular anti-clogging air nozzle, and the air blowing direction is along the horizontal tangent direction of the inner wall of the ash drop buffer section. The air nozzle is consistent with the spiral rotation direction of the spiral guide rib, and the horizontal tangent direction is inclined downward at 5°-8°. The airflow interface is connected to a low-pressure stabilizing air source of 0.3-0.5MPa. The air nozzle orifice diameter is 2-3mm, and the air nozzle is flush with the inner wall of the ash drop buffer section.

[0010] More preferably, the cross-section of the annular reinforcing rib is an isosceles trapezoid; the number of the annular reinforcing ribs is set according to the length of the flow stabilizing section, and the wall thickness in the middle of the flow stabilizing section is greater than that at both ends.

[0011] More preferably, the elastic sealing gasket is made of high-temperature and wear-resistant fluororubber, and the elastic sealing gasket is tightly fitted to the end face of the rigid sealing ring; the rigid sealing ring and the pressure-bearing sealing section cylinder are integrally molded structures, and the inner diameter is consistent with the inner diameter of the steady flow conveying section.

[0012] More preferably, the shock-absorbing support is a buffer damping component, which adopts a combination structure of rubber damping pads and springs. The rubber damping pads are located on the upper and lower sides of the springs and are in close contact with the base and support. The bottom of the base is equipped with a leveling component, which is a spiral lifting structure used to adjust the levelness of the ash conveying cylinder.

[0013] The ash conveying control method includes the following steps: Before ash conveying, open the low-pressure stabilizing air source connection airflow interface, put the annular anti-clogging air nozzle of the ash buffer section into standby mode, start the status monitoring component and set the parameter threshold. After the ash conveying is started, the ash material is guided down by the spiral guide ribs of the ash drop buffer section, stabilized by the raised strips of the flow stabilization section, and output by the pressure-bearing sealing section; the monitoring module collects parameters in real time through the material level sensor, pressure sensor, vibration sensor and leakage sensor, and maintains the current opening of the feed valve and the pressure of the air replenishment valve when the parameters meet the standards; When the material level in the ash buffer section exceeds the standard, the risk of ash accumulation is determined, and the annular anti-blockage air nozzle is immediately controlled to pulse purge. At the same time, the opening of the feed valve is reduced by 10%-20%. After the material level falls back to the threshold, the original opening is restored. When the vibration of the steady flow conveying section exceeds the standard, control the vibration damping support to enter the strong vibration reduction mode and adjust the rear air supply valve; when the pressure fluctuation exceeds the standard, fine-tune the pressure of the air supply valve to bring the fluctuation back to the threshold. If a leak signal is detected in the pressure-bearing sealing section, an early warning will be issued immediately, and the opening of the feed valve will be reduced by 30% to remind maintenance personnel to inspect the sealing components. After the ash conveying is completed, close the feed valve, keep the annular anti-clogging air nozzle blowing for 5-10 minutes to clear the residual ash, turn off the low-pressure stabilizing air source, and the status monitoring component enters standby mode.

[0014] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions: The ash-falling buffer section of this invention adopts a gradually tapered frustum design, narrower at the top and wider at the bottom, combined with a spiral guide rib with precise parameters and a tangential guide ring anti-clogging nozzle to force the ash material to fall spirally, dispersing the accumulated stress. Combined with the linkage control of the material level sensor, it significantly reduces the clogging rate and avoids downtime losses caused by manual clearing. The inner wall of the steady flow conveying section has raised strips to regulate the flow of ash material, and the outer ring reinforcing ribs are set with scientific spacing and thickness, which greatly improves the rigidity of the cylinder and resists local deformation under high pressure conditions. Pressure and vibration sensors monitor in real time to ensure a smooth and orderly conveying process. The pressure-bearing sealing section forms a double seal through a rigid sealing ring and a high-temperature and wear-resistant fluororubber elastic sealing gasket. Combined with a leakage sensor for timely early warning, it completely solves the leakage problem under high pressure conveying and extends the service life of the sealing components. The support component adopts a shock-absorbing support combining rubber damping pads and springs, combined with a spiral lifting leveling component, which effectively absorbs vibration energy, avoids ash accumulation caused by installation tilt, and improves the overall structural stability.

[0015] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the stable ash conveying structure in this invention; Figure 2 This is a structural diagram of the ash-falling buffer section in the stable ash-conveying structure of the present invention; Figure 3 This is a cross-sectional view of the ash-falling buffer section in the stable ash-conveying structure of the present invention; Figure 4 This is a structural diagram of the steady-flow conveying section in the stable ash conveying structure of the present invention; Figure 5 This is a cross-sectional view of the steady-flow conveying section in the stable ash conveying structure of the present invention; Figure 6 This is a cross-sectional view of the pressure-bearing sealing section in the stable ash conveying structure of the present invention; Figure 7 This is a structural diagram of the support member in the stable ash conveying structure of the present invention; Figure 8 This is a flowchart of the ash conveying control method in this invention.

[0018] Reference numerals: 10. Ash conveying cylinder; 20. Support component; 21. Base; 22. Vibration damping support; 23. Support seat; 24. Support frame; 30. Ash drop buffer section; 31. Spiral guide rib; 32. Air nozzle; 33. Airflow interface; 34. Material level sensor; 40. Flow stabilizing conveying section; 41. Raised strip; 42. Annular reinforcing rib; 43. Pressure sensor; 44. Vibration sensor; 50. Pressure-bearing sealing section; 51. Flange; 52. Gasket; 53. Rigid sealing ring; 54. Elastic sealing gasket; 55. Leakage sensor. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figure 1-7 As shown, this embodiment of the invention provides a stable ash conveying structure, including an ash conveying cylinder 10. The ash conveying cylinder 10 is a segmented integrated design, consisting of an ash drop buffer section 30, a flow stabilizing conveying section 40, and a pressure-bearing sealing section 50, which are coaxially and fixedly connected. The connection method adopts a full welding process to ensure the sealing and structural strength of the connection, and to prevent leakage or detachment during high-pressure conveying. The bottom of the ash conveying cylinder 10 is stably installed and horizontally adjusted by a support member 20. Each section works together to achieve the functions of buffering and preventing blockage of ash material, stabilizing flow conveying, and pressure-bearing sealing, ensuring the continuity, stability, and safety of the dry ash conveying process.

[0022] like Figure 1-3 As shown, the ash-falling buffer section 30 is the core of the feeding buffer of the entire ash conveying structure. It adopts an integrated molded truncated cone-shaped structure that is narrow at the top and wide at the bottom. This design can use gravity to assist the ash material to fall naturally. At the same time, the gradually changing cavity disperses the stress of ash material accumulation and avoids bridging and blockage caused by excessive local pressure. Its cone angle is set to 38°, which is within the preferred range of 35°-40°. If the cone angle is too small, it will cause ash material to accumulate. If it is too large, it will cause the ash material to fall too fast and cause impact wear. The inner wall of the ash-falling buffer section 30 is equidistantly distributed with integrally formed spiral guide ribs 31. The spiral guide ribs 31 extend spirally downward along the inner wall, and their spiral angle is set at 20°. This angle is set within the preferred range of 18°-22°. This angle can balance the spiral flow speed of the ash material and the guiding effect. It will not cause the ash material to get stuck due to too small an angle, nor will it cause the flow to be turbulent due to too large an angle. The spiral guide ribs 31 protrude 6mm from the inner wall of the ash-falling buffer section 30. This protrusion height is preferably between 5-8mm. If the protrusion height is insufficient, the guiding effect will be poor. If it is too high, it will hinder the flow of ash material. The spiral guide ribs 31 are provided with 0.5mm deep anti-slip teeth on the side facing the ash material flow. These anti-slip teeth can increase the friction between the ash material and the spiral guide ribs 31, prevent the ash material from slipping and accumulating during the guiding process, further enhance the spiral guiding effect, force the ash material to spiral down along the inner wall, and disperse the accumulation stress. Air nozzles 32 are evenly distributed on the inner side of the ash buffer section 30. The air nozzles 32 are annular anti-clogging air nozzles. Their blowing direction is along the horizontal tangent of the inner wall of the ash buffer section 30 and is consistent with the spiral direction of the spiral guide rib 31. At the same time, the horizontal tangent is inclined downward at 6°. This inclination is preferably within the range of 5°-8°. The downward inclination design can apply a downward auxiliary thrust to the ash material to prevent the ash material from being suspended or flowing back. One end of the air nozzle 32 is connected to the airflow interface 33. The airflow interface 33 is connected to a low-pressure stable air source of 0.4MPa. The low-pressure design can achieve anti-clogging blowing without blowing away the ash material or damaging the equipment due to excessive pressure. The orifice diameter of the air nozzle 32 is set to 2.5mm, and the air nozzle 32 is flush with the inner wall of the ash buffer section 30 to prevent the air nozzle 32 from protruding and causing ash material to accumulate. The ash buffer section 30 is equipped with equidistant material level sensors 34, which are selected as radio frequency admittance level switches. This type of sensor has the characteristics of strong anti-dust interference, high measurement accuracy, and adaptability to high temperature conditions. It can monitor the accumulation height of ash in the ash buffer section in real time and provide accurate signal support for subsequent linkage anti-blocking control. The ash-falling buffer section 30 is a gradually tapered cone that is narrower at the top and wider at the bottom. The narrow opening at the top of the cone is matched with the ash hopper outlet to prevent powder from falling in mid-air. The inner diameter of the narrow opening at the top of the cone is the same as the outer diameter of the ash hopper outlet, and the two are sealed together without gaps. After the powder is discharged from the ash hopper, there is no space for it to fall in mid-air. Combined with the annular vortex formed inside the cone by the air nozzle 32, the ash material must first contact the inner wall of the cone or the spiral guide rib 31, rather than falling vertically and then spreading. This avoids the situation where the ash material does not stick to the wall from the source. The cone angle is precisely defined as 35°-40°; the angle of repose of the dry ash powder is 30°-40°, with the cone angle slightly larger than the angle of repose of the dry ash. This is the core mechanical basis for forced wall adhesion: when the cone angle is greater than the angle of repose of the powder, the powder cannot stay on the wall after contacting it and can only slide down the wall; if the cone angle is less than or equal to the angle of repose, the powder will accumulate on the wall and will not be able to flow; when the ash material contacts the cone wall, it will be forced to slide down and will not fall vertically in mid-air, thus mechanically preventing non-adhesion to the wall; The narrow opening at the top of the cone fits seamlessly with the ash hopper outlet and features an inward-sloping design. The narrow opening at the top of the cone is recessed inward by 2-3cm, flush with and sealed to the inner wall of the ash hopper outlet. When the ash hopper discharges, the powder has no suspended space and must first contact the inner wall of the cone or the guide ribs before it can fall. The sloping wall of the cone provides support and guidance, forcibly changing the vertical trajectory: When dry ash falls vertically, it is subject to gravity. After contacting the sloping inner wall of the cone, the wall will give the powder an upward supporting reaction force. This force will be decomposed into a horizontal component that pushes the powder to adhere to the wall and a vertical component that assists in sliding down. This forces the powder, which was originally falling vertically, to slide down the wall instead of continuing to move vertically. This is the core structural force that forces the powder to adhere to the wall. The tapered angle, which is narrower at the top and wider at the bottom, is calculated by mechanics: the cone angle is neither too small, which would cause the powder to get stuck, nor too large, which would cause the powder to slide down too quickly. It is just right so that when the powder is subjected to the supporting force, it can completely adhere to the wall surface. Moreover, the cone angle is consistent from top to bottom, ensuring that it adheres to the wall without detachment throughout the process. The spiral guide rib 31 is not simply attached to the wall surface, but a forced flow guiding component that works in conjunction with the frustum structure to completely solve the problem of powder not adhering to the wall in the middle. Its specific function is divided into three steps: Interception function: The spiral guide rib 31 extends spirally downward along the inner wall of the cone, protruding 3-5mm from the inner wall. Even if the particles in the center of the powder group fall vertically, they will be intercepted by the guide rib and cannot pass through directly. They can only be forced to change their direction of movement and slide down the surface of the spiral guide rib 31, thus preventing the powder from passing through empty spaces in the middle. Diversion function: The spiral guide ribs 31 are evenly arranged along the circumference of the cone, dividing the internal space of the cone into multiple independent spiral guide channels. After the powder enters from the top, it will be evenly diverted into each channel by the spiral guide ribs 31. The powder in each channel must adhere to the channel wall to achieve full-area powder adhesion to the wall, rather than only a small amount of powder adhering to the edge. Limiting function: The spiral guide rib 31 has a spiral rise angle of 15°-25° and a cone angle of 30°-45°. When the powder slides down along the guide rib, it will be limited by the spiral guide rib 31 and always maintain a state of contact with the wall surface. It will not detach from the wall surface due to excessive sliding speed. At the same time, the spiral trajectory extends the contact path to ensure full contact. Tangentially arranged annular anti-clogging air nozzle 32: The air nozzle 32 is connected to a low-pressure stable air source and continuously outputs tangential airflow during ash conveying, forming an annular vortex inside the cone: The vortex will drive the powder that is not completely attached to the wall at the center of the cone to rotate and move towards the wall, forcing it to contact the inner wall of the cone and the spiral guide rib 31. At the same time, the vortex can blow away the clumps of powder, avoid material accumulation in the middle, and perform airflow-assisted guidance, forming a double guarantee with the structural guidance.

[0023] like Figure 1 , 3 As shown in Figure 4, the steady flow conveying section 40 and the ash drop buffer section 30 are fixedly connected by full welding. It is a key section for the stable conveying of ash. The inner wall of the section is integrally formed with raised strips 41 distributed at equal intervals. The raised strips 41 are evenly arranged along the axial direction of the steady flow conveying section 40, which can play a sorting role on the flowing ash, break the turbulent flow state of the ash, and make the ash form a stable columnar flow, which not only improves the conveying efficiency, but also reduces the local wear of the ash on the inner wall of the cylinder. The outer side of the steady flow conveying section 40 is fixedly connected with annular reinforcing ribs 42, the cross-section of which is an isosceles trapezoid. The spacing of the annular reinforcing ribs 42 is set to 1.3 times the diameter of the cylinder of the steady flow conveying section 40, which can ensure that the cylinder is evenly stressed under high pressure conditions and avoid deformation caused by local stress concentration. The thickness of the annular reinforcing ribs 42 is 1.8 times the wall thickness of the cylinder of the steady flow conveying section 40, which improves the rigidity of the cylinder and resists the radial pressure during high pressure conveying. At the same time, the wall thickness of the middle section of the steady flow conveying section 40 is greater than that of the two ends, because the middle section is subjected to the greatest stress during the conveying process. The thickened design can further prevent local deformation and extend the service life of the equipment. A pressure sensor 43 is installed on the inner wall of the steady flow conveying section 40. The sensor is a diffused silicon pressure sensor, which has the characteristics of wide measurement range, high accuracy and strong stability. It can collect pressure data in the steady flow conveying section in real time, reflect the resistance change of ash material conveying, and provide a basis for pressure regulation. A vibration sensor 44 is installed on the outer side of the steady flow conveying section 40. The sensor is a piezoelectric vibration sensor, which has high sensitivity and fast response speed. It can capture the vibration signal of the cylinder during the conveying process and determine whether there is ash material impact or equipment abnormality.

[0024] like Figure 1 and Figure 6 As shown, the pressure-bearing sealing section 50 is connected to the steady flow conveying section 40 and is the core section to ensure the sealing performance of high pressure conveying. One end of the pressure-bearing sealing section 50 is integrally formed with a flange 51, and a gasket 52 is provided on one side of the flange 51. The gasket 52 is made of flexible graphite, which has the characteristics of high temperature resistance, high pressure resistance and good sealing performance. It can enhance the sealing performance of the flange connection and prevent gas or ash leakage. A rigid sealing ring 53 is integrally formed on one side of the pressure-bearing sealing section 50. The rigid sealing ring 53 and the cylinder of the pressure-bearing sealing section 50 are integrally formed structures. Its inner diameter is consistent with the inner diameter of the steady flow conveying section 40, ensuring that the ash material passes smoothly during the conveying process and avoiding the accumulation or jamming of ash material due to sudden changes in the inner diameter. An elastic sealing gasket 54 is installed on one side of the rigid sealing ring 53. The elastic sealing gasket 54 is made of high temperature and wear-resistant fluororubber. The elastic sealing gasket 54 is tightly fitted with the end face of the rigid sealing ring 53 to form a double sealing structure, which completely solves the leakage problem under high pressure conveying. A leakage sensor 55 is installed on the inner wall of the pressure-bearing sealing section 50. It is a gas leakage sensor. This sensor can quickly detect leakage of ash, dust or conveying medium, and issue an early warning signal in time to remind maintenance personnel to carry out maintenance and avoid the leakage from expanding and causing safety accidents or environmental pollution.

[0025] like Figure 1 and Figure 7As shown, a support component 20 is installed at the bottom of the ash conveying cylinder 10. The support component 20 includes a base 21, a shock-absorbing support 22, a support base 23, and a support frame 24, which serve to fix, dampen, and level the cylinder. The base 21 provides a stable foundation for the entire support structure. A leveling component is installed at the bottom of the base 21. The leveling component is a spiral lifting structure, which is similar to a spiral jack. The lifting height can be adjusted by rotating the screw. The level of the ash conveying cylinder 10 can be precisely adjusted according to the ground conditions at the installation site to avoid ash accumulation due to cylinder tilting. Vibration damping supports 22 are symmetrically installed on the top of the base 21. They adopt a combination structure of rubber damping pads and springs. The rubber damping pads are made of nitrile rubber and are located on the upper and lower sides of the springs. They are in close contact with the base 21 and the support 23. This combination structure can effectively absorb the vibration energy generated by the cylinder during the ash conveying process, reduce the impact of vibration on the equipment itself and the surrounding environment, and improve the overall stability of the structure. The support 23 is made of cast iron and serves as a connecting element between the vibration damping supports 22 and the support frame 24. The support frame 24 is formed by welding angle steel and is fixedly connected to the ash conveying cylinder 10 by welding to ensure that the ash conveying cylinder 10 is firmly installed and will not shift during the conveying process.

[0026] like Figure 8 As shown, this embodiment of the invention also provides an ash conveying control method, applied to the above-mentioned stable ash conveying structure, comprising the following steps: Before ash conveying, open the low-pressure stabilizing air source connection airflow interface 33, put the ash buffer section 30 annular anti-blocking air nozzle 32 on standby, start the status monitoring component and set the parameter threshold. After the ash conveying is started, the ash material is guided down by the spiral guide rib 31 of the ash drop buffer section 30, stabilized by the raised strip 41 of the steady flow conveying section 40, and output by the pressure-bearing sealing section 50; the monitoring module collects parameters in real time through the material level sensor 34, pressure sensor 43, vibration sensor 44, and leakage sensor 55. When the parameters meet the standards, the current opening of the feed valve and the pressure of the air replenishment valve are maintained. When the material level in the ash buffer section exceeds the standard, the risk of ash accumulation is determined, and the annular anti-blockage air nozzle is immediately controlled to perform pulse purging. At the same time, the opening of the feed valve is reduced by 10%-20%. After the material level falls back to the threshold, the original opening is restored. When the vibration of the steady flow conveying section 40 exceeds the standard, the vibration damping support 22 is controlled to enter the strong vibration reduction mode and the rear air supply valve is adjusted; when the pressure fluctuation exceeds the standard, the pressure of the air supply valve is finely adjusted to bring the fluctuation back to the threshold. The pressure-bearing sealing section 50 detected a leakage signal and immediately issued an early warning. At the same time, it reduced the opening of the feed valve by 30% to remind maintenance personnel to inspect the sealing components. After the ash conveying is completed, close the feed valve, keep the annular anti-clogging air nozzle 32 blowing for 5-10 minutes to clear the residual ash, turn off the low-pressure stabilizing air source, and the status monitoring component enters standby mode.

[0027] In operation, before ash conveying, the low-pressure stabilizing air source is connected to the airflow interface 33, putting the annular anti-clogging air nozzle 32 of the ash-falling buffer section 30 into standby mode. Simultaneously, the status monitoring components, including the material level sensor 34, pressure sensor 43, vibration sensor 44, and leakage sensor 55, are activated, and the threshold values ​​for each parameter are set. After ash conveying starts, the ash material enters from the top of the ash-falling buffer section 30 and spirals down under the guidance of the gradually tapering frustum-shaped structure (narrower at the top and wider at the bottom) and the spiral guide ribs 31. The air nozzles 32 assist in blowing air in a tangential downward tilting direction to prevent ash accumulation. After entering the stable flow conveying section 40, the ash material is combed by the inner wall protrusions 41 to form a stable flow pattern. The outer annular reinforcing ribs 42 ensure the rigidity of the cylinder. The pressure sensor... 43 and vibration sensor 44 monitor the conveying status in real time. When the standard is met, the current opening of the feed valve and the pressure of the air replenishment valve are maintained. If the material level in the ash drop buffer section 30 exceeds the standard, the air nozzle 32 immediately performs pulse purging and reduces the opening of the feed valve by 10%-20% until the material level drops back to the original level. If the vibration in the steady flow conveying section 40 exceeds the standard, the strong vibration reduction mode of the shock absorption support 22 is activated and the air replenishment valve is adjusted. When the pressure fluctuates, the air replenishment valve is finely adjusted to bring the parameters back to the threshold. If a leak is detected in the pressure-bearing sealing section 50, an early warning is issued and the opening of the feed valve is reduced by 30%. After the ash conveying is completed, the feed valve is closed, and the air nozzle 32 is kept purging for 5-10 minutes to clear the residual ash. Then the low-pressure stabilizing air source is turned off, the status monitoring components enter standby mode, and the entire ash conveying process is completed.

[0028] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A stable ash conveying structure, comprising an ash conveying cylinder (10), characterized in that: The ash conveying cylinder (10) includes an ash drop buffer section (30), a steady flow conveying section (40), and a pressure-bearing sealing section (50). The ash-falling buffer section (30) is integrally formed into a gradually tapered frustum shape. Spiral guide ribs (31) are integrally formed and distributed at equal intervals on the inner wall of the ash-falling buffer section (30). Air nozzles (32) are installed at equal intervals on the inner side of the ash-falling buffer section (30). One end of the air nozzle (32) is connected to an airflow interface (33). Material level sensors (34) are installed at equal intervals inside the ash-falling buffer section (30). The steady flow conveying section (40) is fixedly connected to the ash buffer section (30). The inner wall of the steady flow conveying section (40) is integrally formed with protruding strips (41) distributed at equal intervals. The inner wall of the steady flow conveying section (40) is equipped with a pressure sensor (43), and the outer side of the steady flow conveying section (40) is equipped with a vibration sensor (44).

2. The stable ash conveying structure according to claim 1, characterized in that: The pressure-bearing sealing section (50) is fixedly connected to the flow-stabilizing conveying section (40). One end of the pressure-bearing sealing section (50) is integrally formed with a flange (51). A gasket (52) is provided on one side of the flange (51). A rigid sealing ring (53) is integrally formed on one side of the inside of the pressure-bearing sealing section (50). An elastic sealing gasket (54) is installed on one side of the rigid sealing ring (53). A leakage sensor (55) is installed on the inner wall of the pressure-bearing sealing section (50).

3. The stable ash conveying structure according to claim 1, characterized in that: The bottom of the ash conveying cylinder (10) is equipped with a support member (20). The support member (20) includes a base (21), a shock-absorbing support (22), a support seat (23), and a support frame (24). The shock-absorbing support (22) is symmetrically installed on the top of the base (21). The support seat (23) is installed on the top of the shock-absorbing support (22). The support frame (24) is fixedly connected to the top of the support seat (23). The support frame (24) is fixedly connected to the ash conveying cylinder (10).

4. The stable ash conveying structure according to claim 1, characterized in that: The outer side of the steady flow conveying section (40) is fixedly connected with annular reinforcing ribs (42). The spacing of the annular reinforcing ribs (42) is 1.2-1.5 times the diameter of the cylinder of the steady flow conveying section (40), and the thickness of the annular reinforcing ribs (42) is 1.5-2 times the wall thickness of the cylinder of the steady flow conveying section (40).

5. The stable ash conveying structure according to claim 1, characterized in that: The ash-falling buffer section (30) is a gradually tapered frustum shape with a narrow top and a wide bottom. The cone angle of the ash-falling buffer section (30) is 35°-40°. The spiral guide rib (31) extends spirally downward along the inner wall of the ash-falling buffer section (30) with a spiral rise angle of 18°-22°. The spiral guide rib (31) protrudes 5-8mm from the inner wall of the ash-falling buffer section (30). The spiral guide rib (31) has anti-slip teeth with a depth of 0.5mm on the side facing the ash flow.

6. The stable ash conveying structure according to claim 1, characterized in that: The air nozzle (32) is an annular anti-clogging air nozzle, and the air blowing direction is along the horizontal tangent direction of the inner wall of the ash buffer section (30). The air nozzle (32) and the spiral guide rib (31) have the same spiral direction, and the horizontal tangent direction is tilted downward by 5°-8°. The airflow interface (33) is connected to a low-pressure stabilizing air source of 0.3-0.5MPa. The diameter of the air nozzle (32) is 2-3mm. The air nozzle (32) is flush with the inner wall of the ash buffer section (30).

7. The stable ash conveying structure according to claim 4, characterized in that: The cross section of the annular reinforcing rib (42) is an isosceles trapezoid; the number of the annular reinforcing ribs (42) is set according to the length of the steady flow conveying section (40), and the wall thickness in the middle of the steady flow conveying section (40) is greater than that at both ends.

8. The stable ash conveying structure according to claim 2, characterized in that: The elastic sealing gasket (54) is made of high temperature and wear resistant fluororubber material. The elastic sealing gasket (54) is tightly fitted to the end face of the rigid sealing ring (53). The rigid sealing ring (53) and the pressure-bearing sealing section (50) cylinder are integrally formed structures, and the inner diameter is consistent with the inner diameter of the steady flow conveying section (40).

9. The stable ash conveying structure according to claim 3, characterized in that: The shock-absorbing support (22) is a buffer and vibration damping component. It adopts a combination structure of rubber vibration damping pad and spring. The rubber vibration damping pad is located on the upper and lower sides of the spring and is in close contact with the base (21) and the support (23). The bottom of the base (21) is equipped with a leveling component. The leveling component is a spiral lifting structure used to adjust the level of the ash conveying cylinder (10).

10. A method for controlling ash conveying, applied to a stable ash conveying structure as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Before conveying ash, open the low-pressure stabilizing air source to connect the airflow interface (33), put the ash buffer section (30) annular anti-blocking air nozzle (32) on standby, start the status monitoring component and set the parameter threshold; After the ash conveying is started, the ash material is guided down by the spiral guide rib (31) of the ash drop buffer section (30), stabilized by the raised strip (41) of the steady flow conveying section (40), and output by the pressure sealing section (50); the monitoring module collects parameters in real time through the material level sensor (34), pressure sensor (43), vibration sensor (44), and leakage sensor (55). When the parameters meet the standards, the current opening of the feed valve and the pressure of the air replenishment valve are maintained. When the material level in the ash buffer section (30) exceeds the standard, the risk of ash accumulation is determined, and the annular anti-blocking air nozzle (32) is immediately controlled to pulse purge. At the same time, the opening of the feed valve is reduced by 10%-20%. After the material level falls back to the threshold, the original opening is restored. When the vibration of the steady flow conveying section (40) exceeds the standard, the vibration damping support (22) is controlled to enter the strong vibration reduction mode and the rear air supply valve is adjusted; when the pressure fluctuation exceeds the standard, the pressure of the air supply valve is finely adjusted to bring the fluctuation back to the threshold. When the pressure-bearing sealing section (50) detects a leakage signal, it immediately issues an early warning and reduces the opening of the feed valve by 30% to remind maintenance personnel to inspect the sealing components. After the ash conveying is completed, close the feed valve, keep the annular anti-clogging air nozzle (32) blowing for 5-10 minutes to clear the residual ash, close the low-pressure stabilizing air source, and the status monitoring component enters the standby state.

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