CN109468917B - Spiral material distributing system and paver - Google Patents

Spiral material distributing system and paver Download PDF

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Publication number
CN109468917B
CN109468917B CN201910015927.5A CN201910015927A CN109468917B CN 109468917 B CN109468917 B CN 109468917B CN 201910015927 A CN201910015927 A CN 201910015927A CN 109468917 B CN109468917 B CN 109468917B
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China
Prior art keywords
assembly
boom
stirring
ironing
spiral
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CN109468917A (en
Inventor
廖昊
黄建华
侯志强
王浩
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Jiangsu Xugong Construction Machinery Research Institute Co ltd
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Jiangsu Xugong Construction Machinery Research Institute Co ltd
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/18Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
    • E01C19/187Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect solely for spreading-out or striking-off deposited mixtures, e.g. spread-out screws, strike-off boards
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The application discloses a spiral material distribution system and a paver, which relate to the technical field of road construction and are used for optimizing the structure of the spiral material distribution system. The spiral material distributing system comprises a material stirring component, an ironing component and a hanging rod. The stirring assembly is used for stirring materials. The ironing assembly is arranged near the stirring assembly and is configured to iron the stirred material. A boom is rotatably connected to the deflector assembly 1, the boom being adapted to support the deflector assembly, the boom being configured such that at least one of the boom sections has a cross-sectional area that is gradually reduced in the direction of movement of the material. According to the technical scheme, after the material is pulled out from the material pulling component, the material is thrown onto the material blocking component, and then falls down after being collided by the material blocking component. In the collision process, the movement of the materials is irregular, and due to inertia, the movement of the large materials is irregular, so that the fallen large materials are in a random distribution state, and the problem of road surface depth segregation at the ironing assembly is solved.

Description

Spiral material distributing system and paver
Technical Field
The application relates to the technical field of road construction, in particular to a spiral material distribution system and a paver.
Background
The paver is a pavement construction machine for paving a road base layer and a pavement layer, and is widely applied to paving and constructing of pavements such as expressways, urban roads, rural roads, airport runways and the like. The spiral material distributing system is a core working part of the paver and is used for uniformly and virtually paving the paving mediums such as cement stabilized concrete materials or asphalt mixtures and the like detached from the dumper on the whole pavement width. The spiral material distribution system comprises a material distribution box, a spiral blade, a spiral shaft, a suspension rod, an ironing assembly, a front baffle and other structural connecting pieces.
In order to reduce the material distribution resistance of the spiral material distribution system and improve the segregation resistance of the paver, the existing pavers of various brands adopt spiral blades with large spiral diameters and small spiral pitches, the diameter D of each spiral blade is 470-500 mm, and the pitch S of each spiral blade is 310-320 mm.
The inventors found that at least the following problems exist in the prior art: in the spiral material dividing groove, large-particle materials have larger kinetic energy, and are easy to accumulate at the suspender after rolling, so that pavement depth segregation is formed.
Disclosure of Invention
The application provides a spiral material distribution system and a paver, which are used for optimizing the structure of the spiral material distribution system.
The embodiment of the application provides a spiral material distributing system, which comprises:
the stirring assembly is used for stirring materials;
the ironing assembly is arranged near the stirring assembly and is configured to iron the stirred material of the stirring assembly; and
a boom rotatably coupled to the deflector assembly, the boom being configured to support the deflector assembly, the boom being configured such that at least one of the segments increases in cross-sectional area along the direction of travel of the material.
In some embodiments, the boom comprises:
a first connection part configured to be connected with the bracket; and
the second connecting part is connected with the first connecting part, the cross section of the second connecting part is trapezoid, and one end of the second connecting part is fixed with the stirring assembly.
In some embodiments, the second connection portion has an inclination angle of 5 ° to 35 °.
In some embodiments, the first connection portion and the second connection portion are integral.
In some embodiments, the spiral dispensing system further comprises:
the material blocking assembly is arranged on one side of the ironing assembly, which faces the material stirring assembly; the material blocking assembly is configured to collide with the material pulled out by the material pulling assembly, so that the material falls down after collision.
In some embodiments, the dam assembly comprises:
the installation part is fixed with the ironing assembly; and
the arc-shaped part is installed on the installation part and is configured to collide with the material pulled out by the stirring assembly.
In some embodiments, the mounting portion is integral with the arcuate portion.
In some embodiments, the mounting position of the stop assembly is higher than the position of the rotational central axis of the kick-out assembly.
In some embodiments, the spiral dispensing system further comprises:
the side plates are two groups, one group is arranged at the first end of the ironing assembly, and the other group is arranged at the second end of the ironing assembly.
In some embodiments, the kick-out assembly includes:
a rotating shaft; and
and the blade assembly is arranged on the rotating shaft and rotates along with the rotation of the rotating shaft.
In some embodiments, the number of blade assemblies is at least two, each blade assembly comprising:
the shaft sleeve comprises at least two mounting holes connected with the rotating shaft; and
and the blade is arranged on the shaft sleeve.
In some embodiments, each of the bushings includes two mounting holes that are spaced apart on either side of the vane on the bushing.
In some embodiments, the distance between the centerlines of two of the mounting holes on the same hub is equal to half the pitch of the blade.
The embodiment of the application also provides a paver, which comprises the spiral material distributing system provided by any technical scheme of the application.
According to the technical scheme, the inclination angle of the suspender is consistent with the movement direction of the material, under the condition of ensuring the strength, the cross section area of the suspender in the vertical movement direction of the material is reduced, namely, at least one section of the suspender, which is positioned at the upstream of the movement direction of the material, is small in size, the condition that large-particle materials collide with the suspender is reduced, and the problem of transverse segregation formed by stacking of large particles at the suspender is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a spiral material distributing system according to an embodiment of the present application;
fig. 2 is a schematic perspective view illustrating a connection relationship between an ironing assembly and a material blocking assembly of a spiral material distribution system according to an embodiment of the present application;
fig. 3 is a schematic side view illustrating a connection relationship between an ironing assembly and a blocking assembly of the spiral material distribution system according to an embodiment of the present application;
fig. 4 is a schematic perspective view of a boom of a spiral material distribution system according to an embodiment of the present application;
FIG. 5 is a schematic top view of a boom of a screw feed distribution system according to an embodiment of the present application;
fig. 6 is a perspective view of a boom installation state of a spiral material distribution system according to an embodiment of the present application;
fig. 7 is a schematic front view illustrating an installation state of a boom of a spiral material distribution system according to an embodiment of the present application;
FIG. 8 is a schematic front view of a blade assembly of a helical dispensing system according to an embodiment of the present application;
FIG. 9 is a schematic diagram illustrating connection of a plurality of blade assemblies of a spiral material distribution system according to an embodiment of the present application;
fig. 10 is a schematic front view illustrating an installation state of a kick-out assembly of a spiral material distributing system according to an embodiment of the present application;
fig. 11 is a schematic top view illustrating an installation state of a kick-out assembly of a spiral material distributing system according to an embodiment of the present application.
Detailed Description
The technical scheme provided by the application is described in more detail below with reference to fig. 1 to 11.
The terms or terminology referred to herein are interpreted.
Lateral segregation: the evenly mixed paving medium is segregated along the paving width direction of the paver. Namely: in the width direction of the pavement, the components (divided according to the particle size) composing the paving medium are unevenly distributed.
Deep segregation: the evenly mixed paving medium is segregated along the paving depth direction of the paver. Namely: in the depth direction of paving, the components (divided according to the particle size) constituting the paving medium are unevenly distributed.
Referring to fig. 1 and 6, an embodiment of the present application provides a screw feed system comprising a kick-out assembly 1, an ironing assembly 2 and a boom 5. The stirring assembly 1 is used for stirring materials. The ironing assembly 2 is arranged near the stirring assembly 1 and is configured to iron the stirred material of the stirring assembly 1. A boom 5 is rotatably connected to the deflector assembly 1, the boom 5 being adapted to support the deflector assembly 1, the boom 5 being configured such that at least one of the segments has an increasing cross-sectional area, in particular such as a gradual increase, in the direction of movement of the material.
Referring to fig. 4, in some embodiments, boom 5 is configured such that at least one of the sections has a cross-sectional area that gradually increases along the direction of travel of the material. I.e. the cross-sectional area of the boom 5 upstream of the material movement is smaller than the cross-sectional area of the boom 5 downstream of the material movement. Taking the direction shown in fig. 6 as an example, i.e. the cross-sectional area of the boom 5 on the right side is smaller than the cross-sectional area of the boom 5 on the left side.
The inclination angle of the suspender 5 is consistent with the movement direction of the material, so that the cross section area of the suspender 5 in the direction perpendicular to the movement direction of the material is reduced under the condition of ensuring the strength, namely, the dimension of the suspender 5 positioned at the upstream of the movement direction of the material is small, the condition that large particle materials collide with the suspender 5 is reduced, and the problem of transverse segregation formed by stacking of large particles at the suspender 5 is solved.
The cross section area of the suspender 5 in the material movement direction is reduced to the maximum extent by the suspender 5, the flow of the material at the suspender 5 is ensured, the resistance of the material passing through the suspender 5 is reduced, and the material flow performance is improved; the condition that large particle materials collide with the hanging rod 5 is reduced, and the problem of transverse segregation formed by large particle accumulation at the hanging rod 5 is solved.
Referring to fig. 4 and 6, in some embodiments, the boom 5 includes a first connection 51 and a second connection 52. The first connection portion 51 is configured to be connected to the bracket 6, such as by a bolt connection. The second connecting portion 52 is connected to the first connecting portion 51, and the cross section of the second connecting portion 52 is trapezoidal, and one end of the second connecting portion 52 is fixed, such as welded, to the kick-out assembly 1.
Referring to fig. 3 and 4, the first connection portion 51 is fixed to the front barrier bracket through a bolt hole, and the second connection portion 52 is fixed to the boss 13, such as welded to the boss 13.
Because of the characteristic of spiral material distribution, the material has both transverse speed and longitudinal speed in the trough, so the motion track of the material in the trough is a spiral curve, and the inclination direction of the suspender 5 is ensured to be consistent with the motion direction of the material.
Under the condition that the supporting strength of the suspender 5 is ensured, the cross section area of the suspender 5 in the vertical material movement direction is reduced, and the influence of the suspender 5 on the material movement is reduced to the maximum extent.
The boom 5 minimizes the collision range between the material and the boom 5, particularly, the large-particle material, and greatly reduces the phenomenon that the large-particle material stays at the position due to collision with the boom 5, thereby improving the phenomenon of lateral segregation at the boom 5.
Referring to fig. 4 and 5, in some embodiments, the second connection portion 52 has an inclination angle θ of 5 ° to 35 °. The inclination angle θ is an angle between the plane m1 of the first connecting portion 51 and the plane m2 of the second connecting portion 52.
When the material is an asphalt mixture, it is recommended that θ be 10 ° to 20 °. When the material is cement stabilized soil, it is recommended that θ be 20 ° to 30 °.
In some embodiments, the first connection portion 51 and the second connection portion 52 are integral.
The boom 5 provided by the technical scheme meets the requirement of bearing, almost does not break the continuity of the helical blade 14, and ensures that the driving force of the helical blade 14 is enough; so that the material is not easy to accumulate at the spiral suspender 5, especially large-particle material is not easy to accumulate, and therefore, the transverse segregation is not formed.
Referring to fig. 1 and 3, in some embodiments, the screw dispensing system further comprises a baffle assembly 3. The stirring assembly 1 is used for stirring materials. The ironing assembly 2 is arranged near the stirring assembly 1 and is configured to iron the stirred material of the stirring assembly 1. The material blocking component 3 is arranged on one side of the ironing component 2 facing the material stirring component 1. Wherein, keep off material subassembly 3 is constructed as the material that the collision dialling material subassembly 1 dialled to make the material drop after the collision.
After being pulled out from the stirring assembly 3, the material is thrown onto the blocking assembly 3, and then falls down after being collided by the blocking assembly 3. In the collision process, the movement of the materials is irregular, and due to inertia, the movement of the large materials is irregular, so that the fallen large materials are in a random distribution state, and the problem of road surface depth segregation at the ironing assembly is solved.
Referring to fig. 1 to 3, the dam assembly 3 is fixed to the ironing assembly 2 by bolts. The material blocking component 3 adopts a structure with an arc surface, or adopts a straight surface or a multi-fold line surface and the like.
After the material blocking component 3 is installed, large particle materials collide on the surface of the material blocking component 3 in the rolling process. Because the collision angle of the large particles is irregular, the large particles are scattered on the surface of the materials in the trough randomly after collision, and along with the normal paving operation of the paver, the large particle materials are scattered in the formed pavement randomly in the depth direction, so that the phenomenon of deep segregation at the ironing assembly 2 is solved.
The material blocking component 3 enables large-particle materials to collide with the material blocking component, and the large-particle materials are randomly distributed in the trough after rebound due to the randomness of movement and are randomly distributed in a formed pavement along the material flow, so that the problem of pavement depth segregation at the ironing component 2 is solved.
Referring to fig. 3, in some embodiments, the baffle assembly 3 includes a mounting portion 31 and an arcuate portion 32. The mounting part 31 is fixed with the ironing assembly 2; the arc-shaped part 32 is installed on the installation part 31, and the arc-shaped part 32 is configured to collide with the material pulled out of the material pulling assembly 1.
Referring to fig. 3, the arc portion 32 of the material blocking assembly 3 is an arc surface with a radius R about the center of the rotating shaft 11 as a center a, and the value of R is related to the width of the trough, for example, 200mm to 650mm. The arcuate portion 32 may be replaced with a beveled surface, a polyline surface, or the like.
According to the technical scheme, the distribution condition of large-particle materials on the surface of the trough is improved, so that the large-particle materials can be randomly distributed in the formed pavement. Specifically, after the material blocking component 3 is installed, large particle materials collide on the cambered surface arc-shaped part 32 in the rolling process, because the collision angle of the large particles is irregular, the large particles are scattered on the surface of the materials in the trough randomly after the large particle materials collide, and along with the normal paving operation of the paver, the distribution condition of the large particle materials on the surface of the trough is improved in the depth direction, and the large particle materials are scattered in the formed pavement randomly, so that the phenomenon of depth segregation at the ironing component 2 is solved.
Referring to fig. 3, in some embodiments, the mounting portion 31 is integral with the arcuate portion 32. The material blocking component 3 of the structure has good structural strength and long service life.
In some embodiments, the mounting position of the blanking assembly 3 is higher than the position of the rotation central axis of the kick-out assembly 1. The mounting structure enables the material blocking assembly 3 to be located on the material throwing path of the material stirring assembly 1, so that the materials are fully collided.
Referring to fig. 2, in some embodiments, the spiral dispensing system further includes two sets of side plates 4, one set of side plates 4 being disposed at a first end of the ironing assembly 2 and the other set of side plates 4 being disposed at a second end of the ironing assembly 2.
In some embodiments, the kick-out assembly 1 includes a shaft 11 and a blade assembly 12. The vane assembly 12 is mounted to the rotary shaft 11 and rotates with the rotation of the rotary shaft 11.
Referring to FIG. 6, in some embodiments, the number of blade assemblies 12 is at least two. Each vane assembly 12 includes a hub 13 and a vane 14. The bushing 13 includes at least two mounting holes 15 connected to the shaft 11. The vane 14 is mounted to the boss 13.
By the technical scheme, the structure and the fixing mode of the helical blade 14 are changed, the strength of the helical blade 14 is improved, the stress of the blade 14 is improved, and the failure rate of the root fracture of the blade 14 is reduced.
Referring to fig. 8, in some embodiments, each bushing 13 includes two mounting holes 15, a first mounting hole 15a and a second mounting hole 15b, respectively. Two mounting holes 15 are distributed on both sides of the vane 14 on the boss 13.
The bushings 13 are presented in an asymmetrical configuration, i.e. the length of the bushings 13 on both sides of the blade 14 is not the same.
One end of the shaft sleeve 13 is lengthened L in the original structure 1 The shaft sleeve 13 is provided with a mounting hole 15 on each side of the blade 14, and the two mounting holes 15 have the same size. The shaft sleeve 13 with the structure can be processed and produced by changing the casting model on the basis of unchanged original production process.
According to the technical scheme, the structure of the shaft sleeve 13 and the fixing mode thereof are changed, the stress balance of the helical blade 14 is improved, and the fixing strength of the helical blade 14 is increased, so that the service life of the helical blade is prolonged. Meanwhile, the strength is not influenced under the condition that the number of the mounting holes 15 on the rotating shaft 11 is not increased.
According to the technical scheme, under the condition that the working position of the helical blade 14 and the structure of the rotating shaft 11 are kept unchanged, the structure of the installation and fixation position of the helical blade 14 is optimized, the length of the installation and fixation semicircular shaft sleeve 13 of the helical blade 14 is prolonged, the front and rear adjacent helical blades 14 share one shaft hole for fixation, an original single-bolt fixation mode is changed into a double-bolt fixation mode, the fixation strength of the blade 14 is improved, and the risks of loosening, falling and root fracture failure are reduced.
Referring to FIGS. 8-10, in some embodiments, the centerlines of the two mounting holes 15 on the same hub 13 are spaced a distance equal to the pitch L of the blades 14 2 Half of (a) is provided.
When in installation, adjacent helical blades 14 are fixedly and helically connected together through bolts, and are fixed on the rotating shaft 11 in opposite directions. Each helical blade 14 is fixed on the rotating shaft 11 by two bolts, and has uniform stress and high fixing strength. The rotating shaft 11 does not need to be additionally provided with a fixing hole, so that the strength of the rotating shaft 11 is unchanged.
In the transverse direction of the whole paver, the mounting holes 15 of the stirring assembly 1 are uniformly distributed, the spiral material distribution system is balanced in stress and unchanged in strength.
As shown in fig. 9 and 10, each of the pusher assemblies 1 is fastened to the rotary shaft 11 by bolts one by one, and the helical blade 14 is assembled.
The mounting positions of the adjacent two blades 14 satisfy the following relationship: as shown in fig. 7 and 8, the axial position of the first mounting hole 15a of the screw blade b coincides with the axial position of the second mounting hole 15b of the screw blade a, and the axial position of the second mounting hole 15b of the screw blade b coincides with the axial position of the first mounting hole 15a of the screw blade c.
The horizontal material distribution is realized under the drive of the helical blade 14, and the resistance from the ironing assembly 2 and the hanging rod 5 is furthest received during the material movement. Simultaneously, each stirring assembly 1 is fixed by two bolts and is positioned at two ends of the blade 14, the number of fixed points is increased to 2, and the fixing strength is enhanced. After a certain blade 14 fails, only two bolts for fixing the blade 14 are required to be detached, and a new helical blade 14 is replaced, so that other structures are not affected, and the replacement method is simple and reliable.
The embodiment of the application also provides a paver, which comprises the spiral material distributing system provided by any technical scheme of the application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present application.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A spiral dispensing system, comprising:
the stirring assembly (1) is used for stirring materials;
the ironing assembly (2) is arranged near the stirring assembly (1) and is configured to iron the stirred material of the stirring assembly (1); and
a boom (5) rotatably connected to the deflector assembly (1), the boom (5) being adapted to support the deflector assembly (1), the boom (5) being configured such that at least one section thereof has an increased cross-sectional area along the direction of movement of the material;
wherein the boom (5) comprises:
a first connection part (51) configured to be connected to the bracket (6); and
the second connecting part (52) is connected with the first connecting part (51), the cross section of the second connecting part (52) is trapezoid, and one end of the second connecting part (52) is fixed with the stirring assembly (1); the inclination angle of the second connecting part (52) is 5-35 degrees;
wherein, spiral feed system still includes:
the material blocking assembly (3) is arranged on one side of the ironing assembly (2) facing the material stirring assembly (1); wherein the material blocking assembly (3) is configured to collide with the material pulled out by the material pulling assembly (1) so as to enable the material to fall down after collision;
wherein, keep off material subassembly (3) include:
a mounting part (31) fixed to the ironing unit (2); and
the arc-shaped part (32) is installed on the installation part (31), and the arc-shaped part (32) is configured to collide with the material pulled out of the material pulling assembly (1).
2. Screw dispensing system according to claim 1, characterized in that the first connection (51) and the second connection (52) are integral.
3. Screw dispensing system according to claim 1, characterized in that the mounting portion (31) is integral with the arcuate portion (32).
4. Screw-dispensing system according to claim 1, characterized in that the mounting position of the stop assembly (3) is higher than the position of the rotational centre axis of the deflector assembly (1).
5. The spiral dispensing system of claim 1, further comprising:
the side plates (4) are two groups, one group is arranged at the first end of the ironing assembly (2), and the other group is arranged at the second end of the ironing assembly (2).
6. The screw dispensing system according to claim 1, wherein the deflector assembly (1) comprises:
a rotating shaft (11); and
and a blade assembly (12) mounted to the rotating shaft (11) and rotated with the rotation of the rotating shaft (11).
7. The screw dispensing system of claim 6, wherein the number of blade assemblies (12) is at least two, each blade assembly (12) comprising:
the shaft sleeve (13) comprises at least two mounting holes (15) connected with the rotating shaft (11); and
and a blade (14) mounted on the sleeve (13).
8. Screw-dispensing system according to claim 7, characterized in that each bushing (13) comprises two mounting holes (15), the two mounting holes (15) being distributed on both sides of the blade (14) on the bushing (13).
9. Screw-dispensing system according to claim 8, characterized in that the centre lines of two of said mounting holes (15) on the same bushing (13) are at a distance equal to half the pitch of said blades (14).
10. A paver comprising a spiral distribution system according to any one of claims 1 to 9.
CN201910015927.5A 2019-01-08 2019-01-08 Spiral material distributing system and paver Active CN109468917B (en)

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