Wear-resistant stirring blade suitable for hydrothermal carbonization of sludge
By designing a detachable wear-resistant stirring blade structure, the problems of serious wear and high replacement cost during the hydrothermal carbonization of the sludge are solved, efficient stirring and cleaning effects are achieved, and the wear of the inner wall of the hydrothermal carbonization tank of the sludge is reduced.
Patent Information
- Application Number
- CN202422299551.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing stirring blades are seriously worn during the hydrothermal carbonization of the sludge, resulting in poor cleaning effect and high replacement cost, and inconvenient replacement of the blades and support structures.
The detachable wear-resistant stirring blade structure is designed, including the spindle, transmission ring, limit stop ring and replaceable scraper plate. It uses wear-resistant alloy material, and the scraper plate can be replaced separately to reduce the wear of the inner wall of the sludge water-heat carbonization tank.
Reduces replacement costs, extends service life, improves stirring efficiency and cleaning effect, and reduces wear of the inner wall of the sludge water-heat carbonization tank.
Smart Images
Figure CN223263676U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of stirring structures, and in particular to a wear-resistant stirring blade suitable for sludge hydrothermal carbonization. Background Art
[0002] The stirring blades used in the sludge hydrothermal carbonization tank not only need to have the function of mixing materials, but also need to have the function of scraping off the materials adhering to the inner wall of the sludge hydrothermal carbonization tank. This requires the edge of the blade to be very close to the inner wall of the sludge hydrothermal carbonization tank, and that side contacts the inner wall of the carbonization tank and wears. As the wear increases, the distance between the edge of the blade and the inner wall of the sludge hydrothermal carbonization tank will become larger and larger, and the cleaning effect of the blade edge on the sludge on the inner wall of the sludge hydrothermal carbonization tank will become weaker and weaker, and the cleaning effect of the attachments will become worse and worse.
[0003] Most existing stirring blades are made of wear-resistant materials to improve durability, so the wear on the sludge hydrothermal carbonization tank will be more obvious; on the other hand, the stirring blades are integrated with the supporting structure, and replacing the blades requires replacing the supporting structure together, and the replacement cost is also relatively high. Summary of the Invention
[0004] The purpose of this application is to provide a stirring blade suitable for sludge hydrothermal carbonization that can effectively reduce replacement costs.
[0005] To achieve the above objectives, the present application provides a wear-resistant stirring blade suitable for sludge hydrothermal carbonization: it includes a main shaft, a plurality of transmission rings are fixedly connected to the outside of the main shaft, and a plurality of replaceable scraper plates are commonly inserted into the outer side surfaces of the plurality of transmission rings, and the plurality of replaceable scraper plates are equidistantly arranged around the main shaft, and the upper surface of the transmission ring located at the top and the lower surface of the transmission ring located at the bottom are fixedly connected to limiting retaining rings, and the two limiting retaining rings are suitable for blocking both ends of all the replaceable scraper plates. The main shaft, transmission rings and limiting retaining rings are all supported by wear-resistant alloy materials, and the hardness of the material may be greater than the hardness of the sludge hydrothermal carbonization tank body, and the replaceable scraper plates are made of a material with a hardness less than that of the sludge hydrothermal carbonization tank body, which can effectively reduce the wear of the inner wall of the sludge hydrothermal carbonization tank.
[0006] As a preference, the transmission ring includes a coaxial inner ring and outer ring, the inner ring is fixedly connected to the main shaft, and spokes are provided between the inner ring and the outer ring for transmitting the torque of the inner ring to the outer ring.
[0007] As a preferred embodiment, an inserting groove is provided on the outer side surface of the outer ring, and the inserting groove passes through the upper and lower end surfaces of the outer ring. The replaceable scraper plate includes a sliding plate, which is suitable for fitting with the inserting groove. When the sliding plate fits with all the inserting grooves in the same spiral direction, it can only be disengaged from the inserting groove along the radial direction of the outer ring.
[0008] As a preference, the side edge of the sliding plate outside the insertion groove has a flat scraper, which is suitable for approaching the inner wall of the sludge hydrothermal carbonization tank to peel off the sludge adhered to the inner wall of the sludge hydrothermal carbonization tank.
[0009] As a preference, the replaceable scraper plate extends in a spiral direction around the rotation axis of the main shaft, which is beneficial for dispersing the horizontal resistance to other directions, so that the blades can rotate more easily.
[0010] As a preference, the spiral directions of all the replaceable scraper plates are consistent, and the diameters and pitches are constant and equal. The sizes, shapes and weights of the replaceable scraper plates are all standardized and can be replaced with each other.
[0011] As a preferred embodiment, there are a plurality of spokes between the inner ring and the outer ring belonging to the same transmission ring, and the plurality of spokes are equidistantly arranged around the inner ring, which is conducive to balanced force and mass distribution.
[0012] As a preference, the limit stop ring is fixedly connected to the outer ring through a connecting piece, and the connecting piece includes a bolt and a nut. The bolt passes through the limit stop ring and the outer ring in sequence and is tightened with the nut to suppress the up and down movement of the installed replaceable scraper plate.
[0013] As a preferred embodiment, the outer ring is provided with a second through hole passing through the end surface at a position between the insertion grooves, the limit ring is provided with a first through hole passing through the end surface, the bolt includes a screw rod, one end of the screw rod has an end cap, and the other end passes through the first through hole and the second through hole in sequence to cooperate with the nut to achieve limiting and then tightening.
[0014] As a preferred embodiment, the nut includes a sleeve that cooperates with the screw thread, and a gasket is also provided on the end face of the sleeve facing the limit ring to reduce the contact stress between the screw and the limit ring, so that the end face of the limit ring has better structural integrity.
[0015] Compared with the prior art, the present invention has the following advantages:
[0016] (1) By designing a detachable scraper plate, when the scraper plate is worn out due to long-term operation, only the scraper plate can be replaced without replacing the scraper plate support structure, effectively reducing replacement costs and improving component utilization;
[0017] (2) Since the replaceable scraper plate is easy to replace, it is not necessary to use high-hardness wear-resistant materials, thereby effectively reducing the wear rate of the inner wall of the sludge hydrothermal carbonization tank;
[0018] (3) The design has a reasonable structure, with both horizontal spokes and spiral replaceable scraper plates, which can produce good mixing efficiency and cleaning effects. By designing a detachable limit ring structure, the configured replaceable scraper plates have good working stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the wear-resistant stirring blade suitable for sludge hydrothermal carbonization.
[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the main shaft, transmission ring and limit baffle of the wear-resistant stirring blade suitable for sludge hydrothermal carbonization.
[0021] Figure 3 This is a three-dimensional structural cross-sectional view of the main shaft, transmission ring and limit baffle of the wear-resistant stirring blade suitable for sludge hydrothermal carbonization.
[0022] Figure 4 For the wear-resistant stirring blades suitable for sludge hydrothermal carbonization Figure 3 A partial enlarged view of point A.
[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the transmission ring of the wear-resistant stirring blade suitable for sludge hydrothermal carbonization distributed on the main shaft.
[0024] Figure 6 This is a three-dimensional structural cross-sectional view of the limit retaining ring of the wear-resistant stirring blade suitable for sludge hydrothermal carbonization.
[0025] Figure 7 This is a top view of the replaceable scraper plate of the wear-resistant stirring blade suitable for sludge hydrothermal carbonization.
[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of the connector of the wear-resistant stirring blade suitable for sludge hydrothermal carbonization.
[0027] In the figure: 1. main shaft; 2. transmission ring; 201. inner ring; 202. spokes; 203. outer ring; 204. inserting groove; 205. second through hole; 3. replaceable scraper plate; 301. sliding plate; 302. flat scraper; 4. limit ring; 401. first through hole; 5. connecting part; 510. bolt; 511. screw; 512. end cap; 520. nut; 521. screw sleeve; 522. washer. DETAILED DESCRIPTION
[0028] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0029] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.
[0030] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0031] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such process, method, product or apparatus.
[0032] like Figure 1-8 The wear-resistant stirring blade suitable for hydrothermal carbonization of sludge shown includes a main shaft 1 that can be connected to a drive mechanism, and a plurality of transmission rings 2 are fixedly connected to the outside of the main shaft 1. The axes of these transmission rings 2 are collinear and equidistantly arranged along the length direction of the main shaft 1. The outer side surfaces of these transmission rings 2 are commonly plugged with a plurality of replaceable scraper plates 3. The replaceable scraper plates 3 are consumable parts. When the wear reaches a certain extent, new replaceable scraper plates 3 can be selectively replaced. The replaceable scraper plates 3 extend in the direction of the spiral line around the rotation axis of the main shaft 1. The central angle of the arc of the replaceable scraper plates 3 on the horizontal projection plane is generally in the range of 45° to 60°. The spiral direction of all replaceable scraper plates 3 is consistent, and the diameter and pitch of all replaceable scraper plates 3 are constant and equal. These replaceable scraper plates 3 are equidistantly arranged around the rotation axis of the main shaft 1, and the center of gravity of the entire stirring blade falls on the axis of the main shaft 1. In this way, the mass distribution is more balanced, the vibration is smaller during rotation, and the stability is higher.
[0033] The transmission ring 2 includes an inner ring 201 and an outer ring 203 which are concentric and coaxial. The distance between the outer wall of the inner ring 201 and the inner wall of the outer ring 203 is significantly greater than the wall thickness of the inner ring 201 and the outer ring 203. The inner ring 201 is fixedly connected to the main shaft 1, generally by welding and fixedly connected to the outer side of the main shaft 1. There are spokes 202 between the inner ring 201 and the outer ring 203. The spokes 202 usually extend along the radial direction of the inner ring 201 and the outer ring 203 and have a transverse stirring effect. There are several spokes 202 between the inner ring 201 and the outer ring 203 belonging to the same transmission ring 2. These spokes 202 are equidistantly arranged around the axis of the inner ring 201. The outer side of the outer ring 203 is provided with an insertion groove 204 for insertion. The chute 204 is opened along the spiral direction of the replaceable scraper plate 3, and the multiple plug-in chute 204 cooperating with the same replaceable scraper plate 3 is located in the same spiral direction. The plug-in chute 204 passes through the upper and lower end surfaces of the outer ring 203 to ensure that the replaceable scraper plate 3 has no obstacles during the insertion process. The specific structure of the replaceable scraper plate 3 includes a sliding plate 301, which can be slid into the plug-in chute 204 and plugged in. The side edge of the sliding plate 301 outside the plug-in chute 204 is provided with a flat scraper 302. The flat scraper 302 is on both sides of the sliding plate 301 and also extends in the spiral direction. It can be very close to the inner wall of the sludge hydrothermal carbonization tank, thereby peeling off the material adhered to the inner wall of the sludge hydrothermal carbonization tank.
[0034] The upper surface of the transmission ring 2 at the top and the lower surface of the transmission ring 2 at the bottom are fixedly connected to the limit stop ring 4, which is coaxial with the outer ring 203, and the outer diameter of the limit stop ring 4 is generally not less than the outer diameter of the outer ring 203. The two limit stop rings 4 are used to block the two ends of all replaceable scraper plates 3, thereby effectively suppressing the up and down movement of the replaceable scraper plates 3. The limit stop ring 4 is fixedly connected to the outer ring 203 through the connecting piece 5, which is convenient for disassembly and assembly. The connecting piece 5 includes a bolt 510 and a nut 520 that can cooperate with each other. The bolt 510 passes through the limit stop ring 4 and the outer ring 203 in turn and is tightened with the nut 520. Specifically: the outer ring 203 is provided with a second through hole 205 that passes through the end face at the position between the insertion groove 204, and the limit stop ring 4 is provided with a first through hole 401 that passes through the end face. The number of the first through holes 401 and The position is aligned with the second through hole 205, so all the first through holes 401 and the second through holes 205 can be aligned, and the bolt 510 includes a screw rod 511, and one end of the screw rod 511 has a hexagonal end cap 512 for cooperating with a wrench tool, so that rotating the screw rod 511 is more labor-saving, and the other end of the screw rod 511 passes through the first through hole 401 and the second through hole 205 in turn and cooperates with the nut 520. The nut 520 includes a sleeve 521 that is threadedly matched with the screw rod 511. The sleeve 521 has an outer side surface of a hexagonal prism, which is also convenient for cooperating with the wrench to provide force. In this way, using two wrenches, quick tightening and loosening can be achieved. A gasket 522 is also provided on the end face of the sleeve 521 facing the limit ring 4. The diameter of the gasket 522 is larger than the circumscribed circle diameter of the sleeve 521, which is used to disperse the contact stress between the sleeve 521 and the limit ring 4.
[0035] Working principle: At the beginning, the main shaft 1 and the transmission ring 2 are connected as one. The unworn replaceable scraper plate 3 is inserted into the plug-in groove 204 of the end outer ring 203 in turn, and cooperates with the plug-in groove 204 in the corresponding direction of all the outer rings 203. Since the sliding plate 301 that cooperates with the plug-in groove 204 has a certain thickness and extends along the spiral direction, after cooperating with multiple plug-in grooves 204 arranged along the spiral direction, it will be constrained in different directions inside these plug-in grooves 204. Therefore, even if the cross-section of the sliding plate 301 is not special-shaped, the sliding plate 301 cannot be pulled off from the radial direction of the outer ring 203, and can only be pulled off from both sides. The two ends of the sliding plate 301 are blocked by the limit rings 4. The two limit rings 4 just support the two ends of the sliding plate 301. The replaceable scraper plate 3 has good configuration stability. When the entire stirring blade rotates, the replaceable scraper plate 3 will neither move up and down nor be thrown out by the centrifugal force. When the flat scraper 302 is worn for a long time and the distance from the inner wall of the sludge hydrothermal carbonization tank becomes larger and larger, and it is not enough to completely scrape off the sludge on the inner wall of the sludge hydrothermal carbonization tank, the limit rings 4 can be removed, the worn replaceable scraper plate 3 can be pulled out, and a new replaceable scraper plate 3 can be replaced before it can be used again.
[0036] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.
Claims
1. A wear-resistant stirring blade suitable for sludge hydrothermal carbonization, characterized by: The invention comprises a main shaft (1), wherein a plurality of transmission rings (2) are fixedly connected to the outside of the main shaft (1), and a plurality of replaceable scraper plates (3) are commonly plugged into the outer side surfaces of the plurality of transmission rings (2), and the plurality of replaceable scraper plates (3) are arranged at equal intervals around the main shaft (1), and the upper surface of the transmission ring (2) at the top and the lower surface of the transmission ring (2) at the bottom are both fixedly connected to limit stop rings (4), and the two limit stop rings (4) are suitable for blocking both ends of all the replaceable scraper plates (3).
2. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 1, characterized in that: The transmission ring (2) comprises a coaxial inner ring (201) and an outer ring (203); the inner ring (201) is fixedly connected to the main shaft (1); and spokes (202) are provided between the inner ring (201) and the outer ring (203).
3. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 2, characterized in that: The outer side surface of the outer ring (203) is provided with an inserting slot (204), and the inserting slot (204) passes through the upper and lower end surfaces of the outer ring (203). The replaceable scraper plate (3) includes a sliding plate (301) suitable for fitting with the inserting slot (204).
4. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 3, characterized in that: The side edge of the sliding plate (301) outside the insertion slot (204) is provided with a flat scraper (302), which is suitable for being close to the inner wall of the sludge hydrothermal carbonization tank.
5. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 4, characterized in that: The replaceable scraper plate (3) extends in a spiral direction around the rotation axis of the main shaft (1).
6. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 5, characterized in that: The spiral directions of all the replaceable scraper plates (3) are consistent, and the diameters and pitches are constant and equal.
7. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 3, characterized in that: There are a plurality of spokes (202) between the inner ring (201) and the outer ring (203) belonging to the same transmission ring (2), and the plurality of spokes (202) are arranged at equal intervals around the inner ring (201).
8. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to any one of claims 3 to 7, characterized in that: The limit stop ring (4) is fixedly connected to the outer ring (203) via a connecting piece (5), wherein the connecting piece (5) comprises a bolt (510) and a nut (520), wherein the bolt (510) passes through the limit stop ring (4) and the outer ring (203) in sequence and is then tightened in conjunction with the nut (520).
9. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 8, characterized in that: The outer ring (203) is provided with a second through hole (205) passing through the end face at a position between the insertion groove (204), the limit ring (4) is provided with a first through hole (401) passing through the end face, the bolt (510) includes a screw rod (511), one end of the screw rod (511) has an end cap (512), and the other end passes through the first through hole (401) and the second through hole (205) in sequence to cooperate with the nut (520).
10. The wear-resistant stirring blade suitable for sludge hydrothermal carbonization according to claim 9, characterized in that: The nut (520) includes a threaded sleeve (521) threadably matched with the screw rod (511), and a backing ring (522) is further provided on the end surface of the threaded sleeve (521) facing the limit stop ring (4).