CN215629173U - Paver for preventing asphalt mixture from being transversely separated - Google Patents

Abstract

The utility model belongs to the technical field of highway pavement construction, and relates to a paver for preventing asphalt mixture from being separated transversely, which comprises a paver body and a spiral distributor connected behind the paver body, wherein the spiral distributor comprises a frame and a driving mechanism arranged in the frame, a rotating shaft driven by the driving mechanism is provided with a spiral blade unit, the frame is provided with a front baffle, the spiral blade unit adopts a variable-diameter spiral blade, the diameter of the spiral blade is sequentially increased towards two sides from the middle driving mechanism respectively, the spiral blade unit consists of an inner spiral blade, a middle spiral blade and an outer reverse spiral blade which are sequentially combined into a group, the rotating directions of the inner spiral blade and the middle spiral blade are the same, and the rotating directions of the inner spiral blade and the middle spiral blade are opposite to the rotating directions of the outer reverse spiral blade. The variable-diameter helical blade of the helical blade unit improves the conveying condition of the asphalt mixture, and the reverse helical blade with the larger diameter can block back most of the transversely-moved coarse aggregate, so that the mixture is reversely conveyed to the middle of the paver to form secondary stirring.

Description

Paver for preventing asphalt mixture from being transversely separated

Technical Field

The utility model belongs to the technical field of highway pavement construction, and particularly relates to a paver for preventing a bituminous mixture from being separated transversely.

Background

Asphalt pavement is widely used by various projects as a pavement structure with highest cost performance and applicability, but the engineering quality of asphalt pavement projects is frequently influenced by pavement diseases and is subject to scaling due to various artificial or natural reasons. Wherein the diseases are even more caused by the segregation of the asphalt mixture. Different types of segregation are possible during the construction and paving of wide asphalt pavements, and lateral segregation is a typical hazard for such projects. The key reason for generating the transverse segregation is mainly that the spiral distributor rotating at a high speed generates a large centrifugal force effect, the effect is easy to push coarse aggregates with large grain sizes to the two sides of a road, and the larger the grain sizes are, the farther the coarse aggregates deviate from the center of the road.

The existing method for preventing the transverse segregation of the wide pavement in the paving process is to additionally arrange a baffle device below a helical blade, but a similar structure or method has a problem, and after the structure is additionally arranged, although a secondary stirring function is provided to reduce the transverse segregation, the transverse segregation cannot block coarse aggregates flying to the upper side of the outer side, and the problem of the transverse segregation of the wide pavement cannot be completely solved.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a paver for preventing a transverse segregation of an asphalt mixture, so as to avoid the problem that coarse aggregates flying upward and outward cannot be blocked in the conventional method for preventing a transverse segregation of an asphalt mixture, and to facilitate control of a transverse segregation phenomenon, so as to obtain an effect of paving construction application on an asphalt pavement, which is more beneficial to uniform paving.

In order to achieve the purpose, the utility model provides a paver for preventing asphalt mixture from being separated transversely, which comprises a paver body and an auger distributor connected behind the paver body, wherein the auger distributor comprises a frame and a driving mechanism arranged in the frame, a rotating shaft driven by the driving mechanism is provided with auger blade units for conveying the asphalt mixture to two sides of the paver body, the frame is provided with a front baffle, the auger blade units adopt variable-diameter auger blades, the diameters of the auger blades are sequentially increased from the middle driving mechanism to two sides respectively, the auger blades at the inner side, the auger blades at the middle part and the reverse auger blades at the outer side form a group in sequence, the rotating directions of the auger blades at the inner side and the auger blades at the middle part are the same, and the rotating directions of the auger blades at the inner side and the reverse auger blades at the outer side are opposite. By adopting the scheme, the paver improves the conveying condition of the asphalt mixture through the variable-diameter helical blade of the helical blade unit, and the reverse helical blade with larger diameter can block back most of the transversely-moved coarse aggregates, so that the mixture is reversely conveyed to the middle part of the paver to form secondary stirring.

Further, at least two groups of the helical blade units are symmetrically arranged according to the length of the rotating shaft and relative to the driving mechanism. Thus, the coarse aggregate which flies out transversely can be reversely blocked back for many times on the two sides of the frame of the spiral distributing device to be mixed and stirred again.

Furthermore, be equipped with the baffle unit corresponding with spiral blade unit group number on the preceding baffle, the baffle unit comprises striker plate, fixed plate, and the fixed plate passes through nut and screw fixed connection on preceding baffle, and the striker plate is established on the fixed plate. In this way, the baffle unit can prevent the transversely flying coarse aggregate which is not blocked back by the helical blade from mixing and stirring again.

Further, the fixed plate is parallel arrangement with preceding baffle, and the striker plate is the slope setting towards the reverse helical blade of outside, and the contained angle between striker plate and the fixed plate is between 135 to 165.

Further, the striker plate is located between the middle helical blade and the outer reverse helical blade of the helical blade unit corresponding to the striker plate, and the striker plate is not in contact with the outer helical blade.

Further, the striker plate and the fixing plate are of an integrally formed structure.

Furthermore, the middle part of the striker plate is a vertical plate, and the two side parts of the striker plate are circular arc plates.

The utility model has the beneficial effects that:

1. according to the paver for preventing the transverse segregation of the asphalt mixture, the reverse helical blades are arranged on the rotating shaft, so that the two ends of the asphalt mixture are subjected to secondary stirring during material distribution to reduce the separation of coarse and fine aggregates, and further the transverse segregation is reduced.

2. The paver for preventing the asphalt mixture from being separated transversely can block part of coarse aggregates flying outwards and reduce the transverse separation by arranging the helical blades with the diameters gradually increasing from inside to outside.

3. According to the paver for preventing the asphalt mixture from being separated transversely, the circular arc-shaped upper end striker plate in the baffle plate unit can block coarse aggregates flying upwards to the outer side, and the lower end of the baffle plate unit can slow down the vertical falling time of the asphalt mixture so as to increase the stirring and mixing time of the coarse aggregates and reduce the transverse separation.

4. The paver for preventing the transverse segregation of the asphalt mixture has the advantages of good effects of stirring and controlling the transverse segregation, easiness in operation, good controllability and convenience in construction.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the utility model, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a top view of a paving machine to prevent lateral segregation of an asphalt mixture in an exemplary embodiment;

FIG. 2 is a side view of a paving machine that prevents lateral segregation of an asphalt mixture in an exemplary embodiment;

FIG. 3 is a front view of a baffle unit of a paving machine to prevent lateral segregation of an asphalt mixture in an exemplary embodiment;

reference numerals: paver body 1, actuating mechanism 2, frame 3, preceding baffle 4, the reverse helical blade 5 in outside, middle part helical blade 6, inboard helical blade 7, pivot 8, striker plate 9, fixed plate 10, nut 11, screw 12.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the utility model only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the utility model thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

As shown in fig. 1-3, the basic principle concept of the paver for preventing the lateral segregation of asphalt mixture in this embodiment is as follows, in view of the need to solve the problem of lateral segregation of coarse aggregate: can block horizontal departure of partial coarse aggregate through the helical blade of increase diameter, can reduce the coarse aggregate again and fly out to the outside top after installing the baffle additional, and the reverse helical blade who installs additional also can carry out the secondary to the aggregate and stir and reduce horizontal segregation. Specifically, the spiral material distributor consists of a paver body 1 and a spiral material distributor connected behind the paver body 1. The spiral distributing device comprises a frame 3 connected with a paver body 1 by a connecting rod, a driving mechanism 2 arranged in the center of the frame 3, a rotating shaft 8 driven by the driving mechanism 2 and water stop groups arranged on the rotating shaft 8, wherein the two groups of spiral blade units are spiral blade units which are symmetrical and arranged in an even number relative to the driving mechanism 2, the spiral blade units are variable-diameter spiral blades and are additionally provided with reverse spiral blades, the diameters of the spiral blades are sequentially increased from a middle driving structure to two sides, namely each group of spiral blade units consists of an outer reverse spiral blade 5 with the largest diameter, a middle spiral blade 6 with the slightly smaller diameter and an inner spiral blade 7 with the smallest diameter, the spiral blade units are arranged on the rotating shaft 8 by taking the driving mechanism 2 as a symmetrical center, a front baffle plate 4 is arranged on the frame 3 of the spiral distributing device, a baffle plate unit is arranged on the front baffle plate 4, and comprises a baffle plate 9 and a fixing plate 10, the fixed plate 10 is fixedly connected to the front baffle 4, and the striker plate 9 is arranged on the fixed plate. Therefore, the paver is provided with the spiral blade unit and the baffle unit respectively, on one hand, the variable-diameter spiral blade of the spiral blade unit improves the conveying condition of the asphalt mixture, the blade with larger diameter blocks back the coarse aggregate which is moved transversely, and the reverse spiral blade reversely conveys the mixture to the middle part of the paver to form secondary stirring; on the other hand, the baffle plate unit can prevent the transversely-flying coarse aggregates which are not blocked back by the helical blades from being mixed and stirred again, and the two methods are applied to inhibit the transverse segregation phenomenon in the paving process of the wide pavement.

Be equipped with the baffle unit corresponding with spiral blade unit group number on preceding baffle 4 in this embodiment, this baffle unit is used for the outside top of subtend to fly away from coarse aggregate's stopping, striker plate 9 and the available mould integrated into one piece of fixed plate 10 in the baffle unit, and the lower extreme is the arc plate about the striker plate 9, and the upper end arc plate blocks the coarse aggregate that flies away to the outside top, and the vertical whereabouts time of bituminous mixture is slowed down to lower extreme arc plate, increases the stirring mixing time of coarse and fine aggregate. And the middle part of the material baffle 9 is a vertical plate, so that blanking is convenient. The fixing plate 10 is fixed on the front baffle 4 by four groups of nuts 11 and screws 12, the fixing points form a rectangular shape, the striker plate 9 faces to the outside, and the fixing plate 10 is horizontally fixed towards the driving mechanism 2 and is arranged along the horizontal direction. Meanwhile, when the baffle plate 9 is fixed, the included angle between the baffle plate 9 and the front baffle plate 4 is 150 degrees, the baffle plate 9 is positioned between each group of middle helical blades 6 and outer reverse helical blades 5, and the baffle plate does not need to be in contact with the outer reverse helical blades 5.

During the use, actuating mechanism 2 orders about pivot 8 and drives the reverse helical blade 5 in outside, middle part helical blade 6 and the same rotation of inboard helical blade 7, bituminous mixture is at inboard helical blade 7, under middle part helical blade 6's effect, carry to the paver both sides, this moment through setting up the reverse helical blade 5 in outside reverse with middle part helical blade 6 in pivot 8, make bituminous mixture reverse keep off to and be close to the paver middle part and carry, bituminous mixture forms the secondary in 8 multistage in the pivot like this and mixes, thereby reduce the separation of thickness aggregate and restrain horizontal segregation. Meanwhile, the diameter of the helical blade is gradually increased to block part of the flying coarse aggregate, and the arc-shaped part at the upper end of the material baffle plate 9 in the additionally arranged baffle plate unit has the function of blocking the flying coarse aggregate above the outer side, so that the transverse segregation is more effectively inhibited.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims (7)

1. A paver for preventing asphalt mixture from being separated transversely, which comprises a paver body (1) and a spiral distributor connected at the rear part of the paver body, the spiral distributor comprises a frame (3) and a driving mechanism (2) arranged in the frame, a rotating shaft (8) driven by the driving mechanism is provided with a spiral blade unit for transporting the asphalt mixture to two sides of the paver body, the frame is provided with a front baffle (4), it is characterized in that the spiral blade unit adopts a variable-diameter spiral blade, the diameter of the spiral blade is sequentially increased from the middle driving mechanism to two sides respectively, and the spiral blade unit is composed of an inner spiral blade (7), a middle spiral blade (6) and an outer reverse spiral blade (5) which are sequentially combined into a group, the inner helical blade and the middle helical blade have the same rotating direction, and the rotating directions of the inner helical blade and the middle helical blade are opposite to those of the outer reverse helical blade.

2. The paving machine for preventing lateral segregation of asphalt mixture according to claim 1, wherein the spiral blade units are symmetrically arranged with at least two groups of even numbers with respect to the driving mechanism according to the length of the rotating shaft.

3. The paver for preventing transverse segregation of asphalt mixture according to claim 2, wherein the front baffle is provided with baffle units corresponding to the number of the spiral blade unit groups, the baffle units are composed of a striker plate (9) and a fixed plate (10), the fixed plate is fixedly connected to the front baffle through a nut (11) and a screw (12), and the striker plate is arranged on the fixed plate.

4. The paver for preventing transverse segregation of asphalt mixture according to claim 3, wherein the fixed plate is parallel to the front baffle, the striker plate is inclined toward the outer reverse helical blade, and the included angle between the striker plate and the fixed plate is 135-165 °.

5. The paver of claim 3 wherein the dam is located between the middle helical blade and the outer reverse helical blade of the helical blade unit corresponding to the dam, and the dam does not contact the outer helical blade.

6. The paver of claim 3 wherein the striker plate and the fixed plate are of an integrally formed structure.

7. The paver of claim 3 wherein the middle portion of the striker plate is a vertical plate with arc plates at both sides.

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