CN108080098B - Crushing assembly for sludge crusher and construction method thereof - Google Patents

Abstract

The application relates to a crushing assembly for use in a vertical sludge crusher, which is arranged in a vertical housing and comprises a first rotatable assembly, a second rotatable assembly and a stationary assembly. The first rotatable assembly has a first rotation shaft, a first rotation arm extending outwardly from a lower end thereof, and a crushing member disposed on the first rotation arm. The second rotatable assembly has a second rotatable shaft, a second rotatable arm extending outwardly therefrom, and an annular member disposed on the rotatable arm. The securing assembly has a central post and a strut extending outwardly therefrom. The second rotatable assembly is arranged between the first rotatable assembly and the fixed assembly, the lower end of the second rotating shaft is rotatably arranged in the shaft hole of the center column and extends out of the center column, and the crushing parts and the annular parts are arranged in a staggered mode. The application also relates to a method of constructing a crushing assembly for a vertical sludge crusher.

Description

Crushing assembly for sludge crusher and construction method thereof

Technical Field

The present application relates to the field of sludge drying and to a crushing assembly for a sludge crusher, in particular for crushing sludge blocks in a vertical sludge crusher, and a method of constructing such a crushing assembly.

Background

Sludge drying processes typically require dewatering of liquid sludge to process the liquid sludge into solid sludge. The dewatering treatment generally utilizes solid-liquid separation equipment to carry out solid-liquid separation on sludge, and the dewatered sludge forms larger blocks with a certain water content, so that the sludge blocks are convenient to carry out subsequent landfill, solidification or desiccation treatment, and the larger sludge blocks are also required to be crushed into smaller blocks. Compared with other solid-liquid separation equipment, the sludge block with high solid content can be obtained by adopting the filter press, the water content of the sludge block is about 75-40%, and the sludge block has the characteristics of high hardness and difficult breaking.

Common crushing equipment includes, but is not limited to, jaw crushers, gyratory crushers, cone crushers, hammer crushers, roller crushers, and vibratory crushers, among others. These crushing devices transform the sludge blocks from larger blocks to smaller blocks by the action of the crushing members on the sludge blocks to improve the fluidity of the sludge, thereby facilitating the transportation and treatment of the sludge. However, these crushing apparatuses have many disadvantages, one of which is that the phenomenon that the sludge blocks clog the apparatus during the process of crushing sludge is liable to occur, and the size of the crushed small blocks is not uniform, so that the operation of the apparatus is poor in continuity and the stability of the sludge crushing is affected, thereby increasing the difficulty of the subsequent treatment, and particularly, the water content of the crushed sludge small blocks is difficult to further reduce during the drying process. For this reason, a vertical crusher, which is proposed by the present inventors, in which a crushing process is stable and sludge fragments of uniform particle size can be obtained, can alleviate or avoid these problems, however, there is a drawback in that only one type of crushing assembly can be used for crushing or shearing sludge blocks of different water contents, and thus, there is a need to propose a crushing assembly based on different water contents and adapted to different environmental conditions, and a method of constructing such a crushing assembly.

Disclosure of Invention

In order to eliminate the above-mentioned drawbacks, the present application provides a crushing assembly for a vertical sludge crusher. Such a crushing assembly may be provided within a vertical housing of a vertical sludge crusher to crush sludge chunks into small chunks or pieces of uniform size, thereby improving the flowability of the sludge chunks. The crushing assembly comprises two rotatable assemblies and a stationary assembly. The sludge blocks can be broken into small blocks or fragments with uniform granularity by the rotation of the two rotatable assemblies relative to each other, so that the heated drying of the sludge blocks or fragments can be more uniform in the subsequent drying treatment, and the sludge blocks can be further treated into powder particles.

The crushing assembly for crushing sludge blocks of the present application can continuously crush sludge blocks without clogging. Discontinuous or incomplete receiving surfaces formed by the upper surfaces of the plurality of annular members can be made uneven by providing annular members with circumferential projections in the second rotatable assembly, so that depressions formed between adjacent projections can receive and retard circumferential movement of the sludge block with the first rotatable assembly, thereby positioning the sludge block to promote crushing or shearing of the sludge block.

The application also provides a method for constructing a crushing assembly for crushing sludge blocks, by means of which the intended crushing or shearing out of sludge blocks or fragments of uniform size can be achieved. The preferred crushing assembly suitable for the sludge mass to be crushed is constructed by predetermining the number, shape and size of the individual components of the crushing assembly, e.g. the first rotation shaft of the first rotatable assembly, the first rotation arm, the crushing member, the second rotation shaft of the second rotatable assembly, the second rotation arm, the ring, the projections, and the center column, the struts etc. of the stationary assembly.

The crushing assembly for crushing the sludge blocks has the advantages of simple structure, convenient manufacture and flexible application, and the method for forming the crushing assembly can be suitable for sludge blocks with different water contents to obtain the expected sludge blocks or fragments, so that the application range of the crushing assembly is wide. Since the individual components constituting the crushing assembly may be essentially separate components, these separate components may be secured together by known means of attachment as described above and replaced in the event of wear or damage in use. The spacing between two adjacent ones of the plurality of annular members of the second rotatable assembly may either block the sludge cake from moving circumferentially with the first rotatable assembly or act as a gage for the crushed or sheared sludge cake or fragments, allowing only sludge cake or fragments less than this spacing to pass therethrough, such that the sludge cake is crushed or sheared to a predetermined size. Moreover, in the process of forming the crushing assembly, the crushing assembly is not only beneficial to being independently replaced according to the abrasion or the use condition of the related components, but also is convenient to combine the related components in different crushing assemblies for use. In addition, it is also advantageous to arrange the same type or different types of crushing assemblies in series within a vertically arranged shell of the crusher to configure one or more crushing assemblies as desired. For example, two crushing assemblies may be arranged within the housing in a spaced apart relationship, wherein the upper crushing assembly performs a primary crushing and the lower crushing assembly performs a secondary crushing, thereby effecting a multistage crushing of the sludge cake to obtain the desired cake or fragment.

The crushing assembly for crushing the sludge blocks can realize the control of the granularity of the crushed sludge. By selecting the type of crushing assembly of the present application, it is possible to obtain a desired and uniform size of the pieces or fragments. Due to the reduction of the particle size of the sludge, the fluidity of small sludge fragments can be improved, and the drying speed of the sludge can be accelerated, so that the drying efficiency is improved, the obtained small sludge fragments or fragments have advantages in the aspects of treatment time and stability, the looseness of the dried sludge can be improved, and the subsequent treatment and disposal of the sludge are facilitated.

Drawings

The foregoing and other objects, features and advantages of the application will be more fully appreciated and understood from the following detailed description of the embodiments of the application taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 is a partially cut-away schematic perspective view of a vertical sludge crusher having a crushing assembly of the present application;

FIG. 2 is a longitudinal cross-sectional view of the crushing assembly of FIG. 1;

FIG. 3 is an exploded perspective view of the crushing assembly of FIG. 2;

FIG. 4 is a schematic perspective view of a first rotatable assembly of the crushing assembly of FIG. 2;

FIG. 5 is a schematic perspective view of a second rotatable assembly of the crushing assembly of FIG. 2;

FIG. 6 is a schematic perspective view of a stationary assembly of the crushing assembly of FIG. 2; and

fig. 7 is a flow chart for constructing the crushing assembly of the present application.

Detailed Description

It should be appreciated that for clarity of illustration, the drawings herein are not drawn to scale and that the same or like reference numerals indicate the same or like parts or portions.

Fig. 1 shows schematically in perspective view a vertical crusher, in which a preferred embodiment of the crushing assembly for crushing sludge blocks of the present application is applied. Fig. 2 shows the crushing assembly of fig. 1 in a cross-sectional view. As shown, a crushing assembly 3 for crushing sludge blocks is provided in the housing 2 of the vertical crusher 1. The housing 2 is generally vertically arranged and may include a barrel 202 and a top cover 201 at an upper end of the barrel, wherein a bottom of the barrel 202 is downwardly open. In addition, the case 2 may be constructed in other forms, for example, the cylinder 202 and the top cover 201 of the case 2 may be integrally formed, wherein the top cover 201 is formed as an upper end portion of the cylinder 202 whose top is closed. A feed opening 203 for receiving sludge blocks and a shaft hole 204 for receiving a rotation shaft may be formed on the top cover or the upper end 201, and a lower opening of the housing 2 is used to discharge crushed sludge blocks or fragments. The crushing assembly 3 is arranged within the housing 2 near its lower opening and has a rotatable assembly and a stationary assembly.

Fig. 3 shows the crushing assembly of fig. 2 in an exploded perspective view, while fig. 4-6 show the first rotatable assembly, the second rotatable assembly and the stationary assembly of the crushing assembly of fig. 2, respectively, in an exploded perspective view. As shown in fig. 2-6, the crushing assembly 3 comprises a first rotatable assembly 30, a second rotatable assembly 31 and a stationary assembly 32. In the crushing assembly 3, the first rotatable assembly 30 is located above, the stationary assembly 32 is located below, and the second rotatable assembly 31 is located between the first rotatable assembly 30 and the stationary assembly 32, such that the first rotatable assembly 30, the second rotatable assembly 31 and the stationary assembly 32 are arranged vertically in series. The first rotatable assembly 30 includes a first rotation shaft 301 and one or more first rotation arms 302 cantilevered generally perpendicularly outwardly from a lower portion of the first rotation shaft 301. A plurality of rotating arms, e.g., 2-10 rotating arms 302, may be distributed at angular intervals about the rotational axis 301. Each rotating arm 302 is provided with one or more crushing members 303. A plurality of crushing members, for example, 2-8 crushing members, may be disposed at intervals in the length direction of the rotating arm 302 or the radial direction of the housing 2, wherein each crushing member 303 may protrude downward perpendicular to the rotating arm 302, i.e., substantially parallel to the axis of the rotating shaft 301. The crushing member 303 has a rectangular cross-sectional shape in a thickness direction parallel to the rotation axis 301. Of course, the cross-sectional shape of the crushing member 303 may also include, for example, trapezoidal, oval, square, triangular, and other shapes. The crushing member 303 may form a straight line segment or an arc segment in the circumferential direction of rotation about the rotation axis 301, and preferably has a sharp end at the front facing the rotation direction. The crushing member 303 may be integrally formed with the rotating arm 302 or may be a separate member and secured to the rotating arm 302 by means of a connection known in the art. Where the crushing member 303 is a separate member, it may be replaceable. Likewise, the rotating arm 302 may also be secured to the rotating shaft 301 by means of a connection known in the art. Known means of connection referred to herein may include welding, keying, bolting, plugging, and the like. In addition, the crushing member 303 may be in the form of a cutter-like knife. The lower portion of the first rotational shaft 301 of the first rotatable assembly 30 may include a shaft end 301B that forms a shoulder such that the first rotational shaft 301 and the shaft end 301B have different diameters.

The second rotatable assembly 31 includes a second rotational shaft 311, one or more second rotational arms 312, and one or more ring members 313. A plurality of second rotating arms 312, for example, 2 to 10 second rotating arms, are connected at one ends thereof to the second rotating shaft 311, respectively, and at the other ends thereof are distributed at angular intervals around the second rotating shaft 311 and are cantilevered substantially perpendicularly therefrom. One or more ring members 313 are positioned on the second rotating arm 312, and a plurality of ring members, for example, 2-8 ring members 313, may be disposed at intervals in a length direction of the second rotating arm 312 or a radial direction of the housing. Each ring 313 may be a circular ring or a circular arc segment, wherein the radius of the circular ring or the circular arc segment is associated with its position on the second rotating arm 312, i.e. the closer to the second rotating shaft 311, the smaller the radius of the circular ring or the circular arc segment. In addition, adjacent circular or circular segments may be separated from each other by different distances along the second rotating arm 312, wherein a smaller radius circular or circular segment is closer to the second rotating shaft 311 than a larger radius adjacent circular or circular segment. Each ring or circular arc segment is stably overlapped on more than two second rotating arms 312 so as to maintain a certain interval between two adjacent ring members 313 in the length direction of the second rotating arms or the radial direction of the housing, and preferably each ring member 313 is positioned on at least two second rotating arms 312 to stabilize the positioning of the ring members 313. Fig. 3 shows annular members or rings 313 arranged on four second rotating arms 312, respectively, at intervals. It is noted that the crushing members 303 on the first rotating arm 302 of the first rotatable assembly 30 may protrude downwardly into the corresponding spaces between the adjacent annular pieces 313 on the second rotating arm 312, in other words, the positions at which the crushing members 303 are disposed on the first rotating arm 302 correspond to the spaces between the adjacent two annular pieces 313 mounted on the second rotating arm 312, so that the plurality of crushing members 303 are arranged to be staggered with each other with respect to the plurality of annular pieces 313, respectively, so that the crushing members 303 may perform a circular motion within the corresponding spaces along the inner or outer circumference of the annular pieces 313 when the first rotating shaft 301 rotates. To assist in the stabilization of the first rotation shaft 301, the rotation arm 302 is generally symmetrically arranged with respect to the first rotation shaft 301. As shown, the two rotating arms 302 are symmetrically cantilevered outwardly at an angle of 180 ° to each other, and there are four crushing members or cutters 303 protruding downwardly in the length direction of the first rotating arm 302, wherein the three crushing members or cutters 303 are respectively located in corresponding spaces formed between the adjacent two annular members 313. A blind hole 315 is formed on an upper end surface of the second rotation shaft 311, and a flange 311A is formed on a lower end surface thereof, wherein a shaft section 311B having a small diameter extends downward from the flange 311A. The inner diameter of the blind bore 315 corresponds to the diameter of the shaft end 301B of the first rotational shaft 301 of the first rotatable assembly 31 such that the shaft end 301B of the first rotational shaft 301 is rotatably disposed within the blind bore 315.

The securing assembly 32 includes a central post 321 and one or more struts 322 extending generally perpendicularly outwardly from a circumferential surface of the central post 321. A plurality of struts, such as 2-6 struts 322, each extending generally perpendicularly outwardly from the central post 321 and are angularly spaced about the central post 321. One end of each strut 322 is connected to the central post 321 and the other end is secured to the wall of the housing 2, for example mounted within the aperture 205 of the wall of the housing 2. To stabilize the securing assembly 32, more than three struts 322 are typically provided and extend outwardly from the outer surface of the central post 321 at equal angular intervals from one another. Four struts 322 in fig. 6 depend outwardly from the central post 321 at equal angular intervals. A first shaft hole 323 is formed at a top end of the center post 321 therethrough, and an inner diameter of the first shaft hole 323 corresponds to a diameter of the small-diameter shaft section 311B of the second rotation shaft 311 of the second rotatable assembly 31 so that the small-diameter shaft section 311B is rotatably disposed in and can pass through the first shaft hole 323 so that the second rotation shaft 311 can rotate relative to the center post 321. Since the shaft end 301B of the first rotation shaft 301 of the first rotatable assembly 31 is rotatably provided in the blind hole 315 on the upper end surface of the second rotation shaft 311 as the second shaft hole, the first rotation shaft 301 can be rotated with respect to the second rotation shaft 311. In addition, in order to smooth the rotation of the respective shafts, bearings, for example, a slide bearing, a rolling bearing, or a thrust bearing may be provided in the first shaft hole 323 and the blind hole or the second shaft hole 315, respectively. Referring to fig. 1-3, in the crushing assembly 3, the shaft end 301B of the lower portion of the first rotatable shaft 301 of the first rotatable assembly 30 is rotatably disposed within a blind or second shaft bore 315 of the second rotatable shaft 311 of the second rotatable assembly 31 and may abut against the upper end face of the second rotatable shaft 311 by a shoulder thereon. The plurality of crushing members 303 spaced apart on the first rotating arm 302 of the first rotatable assembly 30 may extend downwardly into respective spaces between adjacent two of the plurality of ring members 313 spaced apart on the second rotating arm 312 of the second rotatable assembly 31, wherein the crushing members 303 and the ring members 313 are interleaved with each other. The small-diameter shaft section 311B of the lower portion of the second rotation shaft 311 of the second rotatable member 31 is rotatably disposed in and extends downward through the first shaft hole 323 of the center post 321 of the fixed member 32, and the lower flange 311A of the second rotation shaft 311 abuts against the upper end surface of the center post 321. The upper end 301A of the first rotatable shaft 301 of the first power input end of the crushing assembly 30 is provided with a power transmission member 4a, such as a gear or pulley, and the other power transmission member 4B is provided on the lower end of the second rotatable shaft 311 of the second rotatable assembly 31, i.e. the small diameter shaft section 311B, which is the second power input end of the crushing assembly. The power transmission members 4a and 4b, such as gears or pulleys, may be coupled with an electric motor or a motor by a belt or a chain or the like to drive the rotation shaft 301. Any suitable drive means may be used to couple with the power transmission to drive rotation of the first and second rotating assemblies 30, 31, respectively. The first and second rotating assemblies 30 and 31 may rotate at different speeds in the same direction with respect to each other, or may rotate in opposite directions, respectively.

As shown in fig. 1, since the housing 2 is disposed vertically, i.e., perpendicular to the ground, the first rotation axis 301 of the first rotatable assembly 30 coincides with the axis of the second rotation axis 311 of the second rotatable assembly 31 and the center post 321 of the fixed assembly 32. The axes of the first rotation shaft 301, the second rotation shaft 311 and the central post 321 are substantially parallel to the longitudinal axis of the housing 2, preferably the axes of the first rotation shaft, the second rotation shaft and the central post coincide with the longitudinal axis of the housing. Referring to fig. 2 and 3, the first rotating arm 302 and the second rotating arm 312 are parallel to and close to each other, and since the crushing members 303 and the ring members 313 are staggered with each other, each of the crushing members 303 on the first rotating arm 302 may extend into a corresponding space between adjacent two ring members 313 on the second rotating arm 312, wherein a width of the crushing member 303 in a length direction of the first rotating arm or a radial direction of the housing is smaller than a corresponding space between adjacent ring members 313 on the second rotating arm 312. In other words, the spacing between two adjacent crushing members 303 is greater than the width of the corresponding ring 313 on the second rotary arm 312 in the length direction of the lever, such that when the first rotatable assembly 30 rotates relative to the second rotatable assembly 31, each crushing member 303 is always located within the corresponding spacing between two adjacent ring 313, such that the crushing member 303 does not interfere with the ring 313.

Among the plurality of ring members of the second rotatable assembly, each ring member 313 may have one or more spaced apart protrusions 314, the spaced apart or intermittent protrusions 314 being fixed to the upper surface of the ring member 313 by a known connection means, and the width of the protrusions in the length direction of the second rotating arm or the radial direction of the ring member may be equal to or smaller than the width of the ring member. It is also possible to integrate these projections with the ring. These protrusions 314 increase the thickness of a partial region of the ring member 313 in the axial direction of the second rotation shaft, i.e., the height of a portion of the ring member 313 in the longitudinal axis direction of the housing 2 increases. As mentioned above, during the crushing process, the first rotatable assembly 30 rotates relative to the second rotatable assembly 31, while the sludge cake entering the crusher falls substantially onto the second rotatable assembly 31. Thus, the discontinuous or incomplete surface formed by the upper surfaces of the plurality of ring members 313 of the second rotatable assembly becomes a bearing surface for receiving sludge blocks. Since the protrusions 314 on each ring 313 cause this bearing surface to become uneven, the sludge blocks falling onto the rings 313 will be discharged from the lower opening of the housing if they are smaller than the spacing between the rings, while the majority of the sludge blocks larger than these spacing are caught between the protrusions 314, only a small part of which is possible with the circumferential movement of the first rotating arm 302 of the first rotatable assembly 30, and therefore, these protrusions 314 provided on the rings 313 help to prevent the sludge blocks falling onto the rings 313 from rotating with the first rotating arm, so that the majority of the sludge blocks remain stationary on the second rotatable assembly 31, and therefore, the crushing or shearing of the sludge blocks by the crushing member 303 on the first rotating arm 302 becomes easier. It is noted that during operation of the crushing assembly, the second rotation axis of the second rotatable assembly 31 may be stationary or rotated in any direction, whereas the rotation speeds of the first rotation axis 301 of the first rotatable assembly 30 and the second rotation axis 302 of the second rotatable assembly 31 are different when both are rotated in the same direction.

As described above, in order to align the first rotation shaft 301 of the first rotatable assembly 30 with the second rotation shaft 311 of the second rotatable assembly 31 to prevent the crushing member 303 from being offset in the corresponding space between the adjacent ring members 313 during rotation of the first and second rotatable assemblies to affect the operation of the crushing member 303, the shaft end 301B of the lower end of the first rotation shaft 301 may be rotatably disposed in the blind or second shaft hole 315 of the upper surface of the second rotation shaft 311, while the small diameter shaft section 311B of the lower portion of the second rotation shaft 311 is rotatably disposed in the first shaft hole 323 of the center post 321 of the fixed assembly 32, thereby ensuring the relative stability of the crushing assembly 3 and simplifying the structure.

In another embodiment, the centering structures on the first rotation shaft and the second rotation shaft may be interchanged, for example, a blind hole is formed on the lower end surface of the first rotation shaft 301, a short shaft is formed on the upper end surface of the second rotation shaft 311, and the diameter of the short shaft corresponds to the inner diameter of the blind hole of the first rotation shaft, so that the short shaft is rotatably positioned in the blind hole, and the lower end surface of the first rotation shaft 301 abuts against the upper end surface of the second rotation shaft 311, and the rotation of the first rotation shaft relative to the second rotation shaft may also be realized.

In a further embodiment, in case the axes of the first rotation shaft 301 of the first rotatable assembly 30 and the second rotation shaft 311 of the second rotatable assembly 31 substantially coincide, the first rotation shaft 301 and the second rotation shaft 311 may be separated, i.e. the lower end of the first rotation shaft 301 and the upper end of the second rotation shaft 311 are spaced apart from each other by a certain distance, but the crushing members may still be located within the respective spaces between adjacent ring members 313.

In yet another embodiment, the protrusions on the upper surface of the ring 313 may be removed, such that the bearing surface for receiving the sludge block is a discontinuous or incomplete flat surface. While a portion of the sludge cake will move circumferentially with the first swivel arm 302 of the first rotatable assembly 30, the efficiency of the crushing may be improved for small particle size sludge cake.

In a further embodiment, one of the first rotational axis 301 of the first rotatable assembly 30 and the second rotational axis 311 of the second rotatable assembly 31 of the crushing assemblies is adjustable relative to the other as required, such that the distance of the first rotatable arm 302 of the first rotatable assembly 30 and the second rotatable arm 312 of the second rotatable assembly 31 or the ring 313 relative to each other is adjustable, such that the distance by which the crushing member 303 extends into the respective space between two adjacent ring 313 can be adjusted. For example, the distance of the first or second rotating arm in the longitudinal direction of the housing may be adjusted.

In the crushing assembly, the width of the crushing members 303 in the radial direction of the shell may be significantly smaller than the spacing between adjacent ring members, leaving a larger gap between the crushing members 303 and the ring members 313, for example, by replacing the crushing members with cutters of a thinner thickness to increase the shearing effect. The size of the gap may be determined based on the desired sludge fragments, e.g. smaller gaps may be used when shearing harder sludge blocks, while the crushing member 303 may be a pointed member. Larger gaps may be used if slightly softer sludge blocks are sheared. The crushing member 303 may employ a cutter. In further embodiments, the front and/or rear ends of the crushing members may be tipped in the circumferential direction of rotation so that the crushing members may shear the sludge block, whether the rotation shaft is rotating in the forward or reverse direction.

The provision of the intermittent projection 314 at the upper end of the annular member 313 has a number of effects, in particular, the provision of the breaker assembly 3 near the lower opening of the housing facilitates breaking of the sludge mass. For example, when a sludge block falls by its own weight from the upper feed opening 203 of the housing 2 onto the lower crushing assembly 3, the sludge block is received by the second rotatable assembly 31 and the intermittent protrusions 314 formed in the circumferential direction of the ring member 313 about the second rotation axis 312 not only act as impact to facilitate crushing, but also tend to hold the sludge block stationary on the ring member and thus to be crushed by the impact of the first rotating arm 302 driven by the first rotation axis 301, so that smaller sludge blocks trapped in the gap between the ring members 313 become sludge fragments or small blocks under the shearing of the crushing member 303 and are discharged out of the housing as soon as possible. In addition, the larger the distance between the crushing assembly 3 and the feed inlet 203 is, the larger the accommodating space of the sludge blocks in the shell 2 is, so that the amount of the sludge blocks in the shell 2 can be adjusted according to the capacity of the space, so that the sludge blocks fed into the shell after the weight of the sludge blocks is utilized are pressed and pushed to the crushing assembly, the crushing speed of the sludge blocks is increased, and the feeding power for pushing the sludge can be saved.

It will be appreciated that the plurality of first rotary arms of the first rotatable assembly may be configured to extend outwardly from the first rotational axis at an angle, such as an acute angle, e.g., 30, up or down, respectively, to the longitudinal axis of the first rotational axis or housing ⁰ -90 ⁰ And are disposed about the first rotational axis at angular intervals, and the plurality of second rotational arms of the second rotatable assembly may be configured to extend outwardly from the second rotational axis at the same angle and orientation as the first rotational arms, respectively, and are distributed about the second rotational axis at angular intervals. A plurality of crushing members extending parallel to the first rotation axis are provided on each of the first rotation arms at intervals along a length direction thereof, and a plurality of ring members are fixed on each of the second rotation arms at intervals along a length direction thereof. When the ring members are mounted on the plurality of second rotating arms, the diameter of each ring member is perpendicular to the second rotational axis, but at an angle to each second rotating arm. Since the first rotation axis is coaxial with the second rotation axis, the crushing member of each first rotation arm may correspond to and be located in the space between the adjacent two ring members 314.

Fig. 7 shows a preferred embodiment of a method for constructing the crushing assembly of the present application. As mentioned above, the crushing assembly of the application may be arranged in the vertical shell 2 of a vertical crusher. In the crushing assembly of the present application, the various components of the first rotatable assembly, the second rotatable assembly and the stationary assembly, e.g. the first rotation shaft, the first rotation arm and the crushing member of the first rotatable assembly, the second rotation shaft, the second rotation arm, the ring and the projection of the second rotatable assembly, and the center post and the strut of the stationary assembly, etc. may be separate components. These individual components may be secured together by known means of attachment as described above and may be replaced in response to wear or damage in use. Accordingly, the person skilled in the art can construct the crushing assembly of the present application based on the water content of the sludge to be crushed in the following manner: selecting the position of the ring members of the second rotatable assembly on its second rotating arm in accordance with the desired sludge bits or pieces, thereby determining the spacing between the ring members; the method comprises the steps of selecting the shape and the size of a crushing part according to the water content of sludge blocks to be crushed, determining a gap between the crushing part and an annular part, and selecting the number of first rotating arms, second rotating arms and supporting rods according to the number of sludge blocks to be crushed, thereby determining the action of the first rotating arms and the second rotating arms and the supporting capacity of the supporting rods; and selecting a relative position of the first rotational axis of the first rotatable assembly with respect to the second rotational axis of the second rotatable assembly in the longitudinal direction of the housing in dependence on the position of the crushing assembly within the vertical housing, thereby determining the distance the crushing member extends into the respective space between two adjacent annular members. The formed crushing assembly may then be disposed within the selected housing. Preferably, the position of the crushing member of the first rotatable assembly on its first rotating arm is selected in dependence of the spacing between the annular members; the shape and size of the protrusions are selected according to the water content of the sludge block to be crushed to determine the number of protrusions provided on the ring and the spacing between adjacent protrusions.

The crushing assembly is simple in structure, convenient to use and flexible in structure. The crushing assembly adapted to the water content of the sludge block to be crushed can be reasonably used or constructed by a person skilled in the art. The number, shape and size of the first rotatable assembly's first rotation axis, the first rotation arm, the crushing member, the second rotatable assembly's second rotation axis, the second rotation arm, the ring, the projection, and the stationary assembly's center post, the support post, etc. and the configuration of the different similar crushing assemblies may be selected by one skilled in the art as desired to obtain the desired sludge cake or fragment. The person skilled in the art can also replace individual components in the crushing assembly, partially or individually, depending on their wear. By providing the protrusions on the ring, most of the sludge fragments falling onto the receiving surface constituted by the ring of the second assembly remain stationary, thereby increasing the crushing speed of the sludge blocks.

By now it should be appreciated by those skilled in the art that the foregoing description of the embodiments has been provided merely to illustrate the preferred embodiments of the application and not all aspects of the application, wherein any form of modification or variation of the above embodiments based on the application will fall within the spirit of the application.

Claims (10)

1. A crushing assembly for use in a vertical sludge crusher for crushing sludge blocks, the crushing assembly being disposed within a vertical housing and comprising:

a first rotatable assembly having a first rotation shaft and one or more first rotation arms extending perpendicularly outwardly from a lower end of the first rotation shaft, wherein the one or more first rotation arms are provided with one or more crushing members arranged at intervals along a length direction of the first rotation arm and extending downward in parallel to the first rotation shaft;

a second rotatable assembly having a second rotation axis, one or more second rotation arms extending perpendicularly outwardly from the second rotation axis, and one or more ring members having a certain diameter, wherein the one or more ring members are disposed on the one or more second rotation arms at certain intervals in a length direction of the second rotation arms around the second rotation axis;

a securing assembly having a central post and one or more struts extending perpendicularly outwardly from the central post, wherein one end of the one or more struts is secured to the central post and the other end thereof is suspended perpendicularly outwardly from the central post and secured to a wall of the housing;

the first rotatable assembly, the second rotatable assembly and the fixed assembly are arranged up and down, wherein the second rotatable assembly is positioned between the first rotatable assembly and the fixed assembly, the lower end of the second rotating shaft is rotatably arranged in the shaft hole of the center column and extends out of the center column, and the one or more crushing components on the one or more first rotating arms of the first rotatable assembly are staggered with the one or more annular components on the one or more second rotating arms of the second rotatable assembly; and

wherein the or each ring of the plurality of rings may have intermittent protrusions on its upper surface.

2. The crushing assembly of claim 1, wherein the axis of the first rotatable shaft of the first rotatable assembly and the axis of the second rotatable shaft of the second rotatable assembly coincide with the axis of the central column of the stationary assembly.

3. A sludge breaker according to claim 1, wherein the or each of the plurality of ring members may be a ring or a segment of a circle.

4. The crushing assembly of claim 1, wherein a lower end of the first rotational shaft of the first rotatable assembly is spaced a distance from an upper end of the second rotational shaft of the second rotatable assembly.

5. The crushing assembly of claim 1, wherein a lower end of the first rotating shaft of the first rotatable assembly forms a shaft bore and an upper end of the second rotating shaft of the second rotatable assembly forms a shaft end having a diameter corresponding to an inner diameter of the shaft bore, the shaft end being positionable within the shaft bore.

6. The crushing assembly of claim 1, wherein the crushing member is replaceable.

7. The crushing assembly of claim 1, wherein the crushing members have a cross-sectional shape that is trapezoidal, oval, square, or triangular.

8. The crushing assembly of claim 1, wherein a shaft hole is formed on an upper surface of the second rotation shaft of the second rotatable assembly, and a shaft end having a diameter corresponding to an inner diameter of the shaft hole is formed at a lower end of the first rotation shaft of the first rotatable assembly, the shaft end being positionable in the shaft hole.

9. A method of constructing the crushing assembly of any one of claims 1-8, the method comprising:

selecting the position of the ring members of the second rotatable assembly on its second rotating arm to determine the spacing between the ring members based on the desired sludge cake or fragment;

selecting a position of the crushing member of the first rotatable assembly on its first rotating arm in dependence on the spacing between the annular members;

selecting the shape and size of the crushing member according to the water content of the sludge block to be crushed to determine a gap between the crushing member and the ring member;

selecting the number of the first rotating arms, the second rotating arms and the supporting rods of the fixing assembly according to the number of sludge blocks to be crushed so as to determine the action of the first rotating arms and the second rotating arms and the supporting capacity of the supporting rods; and

the relative position of the first rotational axis of the first rotatable assembly with respect to the second rotational axis of the second rotatable assembly in the longitudinal direction of the housing is selected in dependence of the position of the crushing assembly within the vertical housing in order to determine the distance by which said crushing members can extend into the respective spaces between two adjacent said annular members.

10. The method of claim 9, wherein the steps further comprise:

the shape and size of the protrusions are selected according to the water content of the sludge block to be crushed to determine the number of protrusions provided on the ring and the spacing between adjacent protrusions.