CN112230684A - Paver with telescopic screed and material level control method - Google Patents
Paver with telescopic screed and material level control method Download PDFInfo
- Publication number
- CN112230684A CN112230684A CN202011145072.7A CN202011145072A CN112230684A CN 112230684 A CN112230684 A CN 112230684A CN 202011145072 A CN202011145072 A CN 202011145072A CN 112230684 A CN112230684 A CN 112230684A
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- Prior art keywords
- material level
- screed
- height information
- telescopic
- driver
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/04—Level control, e.g. controlling quantity of material stored in vessel with auxiliary non-electric power
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4866—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely non-vibratory or non-percussive pressing or smoothing means for consolidating or finishing
- E01C19/4873—Apparatus designed for railless operation
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a paver with a telescopic screed and a material level control method, wherein the telescopic screed comprises a basic section screed and a telescopic section screed, the telescopic section screed is arranged at the rear side of the basic section screed and can transversely move relative to the basic section screed, a front baffle plate connected to the basic section screed is arranged at the front side of the telescopic section screed, at least one part of the front baffle plate can be vertically adjusted through a driver, and a material accommodating cavity is formed between the front baffle plate and the telescopic section screed; the material level sensor is used for measuring material level height information in the material containing cavity, the material level sensor is in signal connection with the material level controller, and the material level controller is used for receiving the material level height information in the material containing cavity and controlling the driver to work; the invention can automatically adjust the material level height between the telescopic section ironing plate and the front baffle, thereby reducing the labor intensity of operators and improving the paving quality.
Description
Technical Field
The invention relates to the technical field of pavers, in particular to a paver with a telescopic screed and a material level control method.
Background
The paver generally comprises a travelling device, a hopper, a material conveying device, a material distributing device, a screed and the like, wherein the travelling device is used for driving the paver to advance, the hopper is used for receiving and storing paving materials, the material conveying device is used for conveying the paving materials in the hopper to the rear of the paver and in front of the screed, the material distributing device is used for conveying the paving materials conveyed by the material conveying device to the whole paving width, and the screed is located at the rear of the paver and used for preliminarily compacting, troweling and finally forming the paving materials. The screed usually includes mechanical screed and flexible screed, and different working width are realized through the extension section that adopts the fastener to assemble different width to the mechanical screed, and flexible screed can conveniently change working width through making the extension section screed transversely (perpendicular to paver advancing direction) flexible for basic section screed.
The most common retractable screed plate at present comprises a base section screed plate and left and right retractable section screed plates which are arranged at the rear side of the base section screed plate and can move transversely relative to the base section screed plate. In order to reduce the amount of material in front of the screed of the telescopic section, reduce the load and the deformation of the screed and thereby improve the paving quality, a front baffle plate connected to the screed of the base section and substantially flush with the front edge of the screed of the base section is often provided in front of the screed of the telescopic section. The front apron may be arranged to move laterally relative to the base section screed and to follow the telescoping section screed as a whole, or it may be arranged that one of the sections may move laterally relative to the other section and the movable section to follow the telescoping section screed, in order to accommodate varying paving widths. It will also be appreciated that some applications where the paving width is relatively constant may be possible by manually adjusting the front fender or a portion of the front fender to accommodate the paving width.
The material conveyed to the front side of the telescopic ironing plate by the material distributing device firstly enters between the front baffle and the telescopic ironing plate through the lower part of the front baffle, and then the paving pavement is formed by the telescopic ironing plate. Ideally, the material level height (i.e. the paving material height) between the front baffle and the telescopic section should satisfy the material quantity required by the telescopic section screed for paving and forming the road surface, and should be maintained at a relatively low and stable height, so as to reduce the material resistance of the telescopic section screed and ensure good paving quality.
In order to adjust the level between the front flap and the telescopic screed, the front flap is usually designed to be height-adjustable in whole or in part. In the prior art, the front baffle is manually adjusted through a screw rod, and is also manually adjusted through a hydraulic oil cylinder. However, whether the screw is manually adjusted by using a tool such as a wrench or the like, or the hydraulic cylinder is manually adjusted by a button on the control panel, the adjustment during the paving process is frequent, and it is a great challenge for the operator to maintain the level height at a desired level.
In addition, it is also known in the industry to control the start-stop or speed of the material distributing device by detecting the material level height at both ends of the material distributing device through material distributing and material level sensors, however, this method is not conducive to controlling the material level height between the telescopic ironing plate and the front baffle plate.
Disclosure of Invention
The invention aims to provide a paver with a telescopic screed and a material level control method, which aim to solve the problem that the material level is difficult to maintain at an ideal height in the paving process in the prior art.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a paver with a telescopic screed comprises the telescopic screed, a material level sensor and a material level controller, wherein the telescopic screed comprises a basic section screed and a telescopic section screed, the telescopic section screed is arranged on the rear side of the basic section screed and can move transversely relative to the basic section screed, a front baffle plate connected to the basic section screed is arranged on the front side of the telescopic section screed, at least one part of the front baffle plate can be adjusted up and down through a driver, and a material accommodating cavity is formed between the front baffle plate and the telescopic section screed;
the material level sensor is used for measuring the material level height information in the material containing cavity, the material level sensor is in signal connection with the material level controller, and the material level controller is used for receiving the material level height information in the material containing cavity and controlling the driver to work.
The height sensor of the front baffle is used for measuring the height information of the movable baffle, and the material level controller is also used for receiving the height information of the movable baffle and controlling the driver to work according to the height information of the movable baffle.
Furthermore, the driver is a hydraulic oil cylinder, and the front baffle height sensor is a stroke sensor arranged in the hydraulic oil cylinder.
The front baffle plate can move transversely relative to the basic section ironing plate, one end of the front baffle plate is connected with the basic section ironing plate, and the other end of the front baffle plate is connected with the side baffle plate.
Further, the material level sensor is connected to the side baffle, and the material level sensor is located at the center of the front and back directions of the material containing cavity.
Further, the material level sensor is an ultrasonic sensor.
The invention also discloses a material level control method of the spreading machine with the telescopic screed, which comprises the following steps:
the material level sensor measures the material level height information in a material containing cavity formed between the telescopic ironing plate and the front baffle;
the material level controller receives the material level height information and controls the driver to work according to the material level height information;
if the material level height information is larger than the preset ideal material level height information, the material level controller controls the driver to drive the vertically adjustable part of the front baffle to descend;
and if the material level height information is less than the preset ideal material level height information, the material level controller controls the driver to drive the vertically adjustable part of the front baffle to ascend.
Further, the method also comprises the following steps:
the front baffle height sensor measures the height information of the movable baffle;
the material level controller receives the height information of the movable baffle and obtains the difference value of the height information of the movable baffle relative to the preset ideal material level height information;
and the material level controller controls the driver to drive the movable baffle plate to ascend or descend according to the difference value.
Further, the absolute value of the difference is the same as the value at which the flapper rises or falls.
Furthermore, the material level controller controls the driver to drive the up-down adjustable part of the front baffle to ascend or descend, and then the driver needs a certain time interval to drive the up-down adjustable part of the front baffle to ascend or descend again.
According to the technical scheme, the embodiment of the invention at least has the following effects:
1. the paver of the device controls the height of at least one part of the front baffle plate through the material level sensor and the material level controller, namely controls the height of the part, which can be adjusted up and down, of the front baffle plate, so as to adjust the material level height in the material containing cavity;
2. according to the method, the material level height information in the material containing cavity is obtained through the material level controller, the material level height information is compared with preset ideal material level height information, the driver is automatically controlled according to the obtained result, and the driver drives the part, which can be adjusted up and down, of the front baffle to lift, so that the automatic adjustment of the material level height in the material containing cavity is completed, the material level height is always maintained at the ideal material level height, the labor intensity of operators is reduced, and the paving quality is improved;
3. according to the method, the height information of the movable baffle is obtained through the front baffle sensor, the movable baffle is controlled to lift according to the difference value of the height information of the movable baffle relative to the height information of the preset ideal material level, the lifting of the movable baffle can be accurately controlled, and the adjustment of the movable baffle can be rapidly and effectively guaranteed;
4. the method needs time intervals for height adjustment of the movable baffle plate, so that the problem of over-adjustment or excessively frequent adjustment is avoided, and the accuracy of material level control is guaranteed.
Drawings
Fig. 1 is a front view of a paving machine in accordance with an embodiment of the present invention;
fig. 2 is a top view of a paving machine in accordance with an embodiment of the present invention;
fig. 3 is a schematic structural view of the retractable screed without the edge guard in accordance with the embodiment of the present invention.
Wherein: 1-a telescopic ironing plate, 11-a basic section ironing plate, 12-a telescopic section ironing plate, 13-a front baffle, 131-a main body part, 132-a movable baffle, 14-a hydraulic oil cylinder, 15-an edge baffle, 2-a material level sensor and 3-a material level controller.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 3, the invention discloses a paver with a telescopic screed, which comprises a telescopic screed 1, a material level sensor 2 and a material level controller 3, wherein the telescopic screed 1 comprises a basic section screed 11 and a telescopic section screed 12, the telescopic section screed 12 is arranged at the rear side of the basic section screed 11 and can move transversely (the direction shown in the figure is the front-back direction) relative to the basic section screed 11, a front baffle 13 connected to the basic section screed 11 is arranged at the front side of the telescopic section screed 12, at least one part of the front baffle 13 can be adjusted up and down through a driver, and a material accommodating cavity is formed between the front baffle 13 and the telescopic section screed 12; the material level sensor 2 is used for measuring material level height information in the material containing cavity, the material level sensor 2 is in signal connection with the material level controller 3, and the material level controller 3 is used for receiving the material level height information in the material containing cavity and controlling the driver to work.
In the present embodiment, the level sensor 2 and the level controller 3 may be separate independent components, however it is equally feasible to integrate the level sensor 2 and the level controller 3 into one. It is also possible to integrate the level controller 3 with an existing master console controller on the paver or, stated differently, to implement the level control function by means of an existing master console controller. The material level controller 3 is integrated in the main console controller, so that the control of an operator is facilitated.
In the present embodiment, the actuator is preferably a hydraulic ram 14, however actuators with equivalent functions, such as an electrically driven screw arrangement, are also possible.
When the actuator is a hydraulic ram 14, the front baffle 13 height sensor is preferably a stroke sensor (not shown in the drawings) built into the hydraulic ram 14 using the electromagnetic effect, a type of which has been widely used and validated. However, it is equally feasible that the front baffle 13 sensor may be other types of sensors, such as various forms of distance sensors, e.g. a pull wire, a laser, etc.
The fill level sensor 2 is preferably an ultrasonic sensor, although a mechanical contact sensor or a laser sensor is also possible.
The level sensor 2 is preferably mounted on an edge baffle 15 at the outer end of the telescoping ironing board 12, and its mounting position can be between the telescoping ironing board 12 and the front baffle 13, as seen from the side, and preferably lies in the vicinity of the middle of the two. With the level sensor 2 installed in this position, more accurate level information can be acquired.
The front apron 13 may be arranged to move laterally with respect to the base screed 11 as a whole to follow the telescopic screed 12 by being connected to the side apron 15, or it may be arranged that one of the sections may move laterally with respect to the other section and the movable section follows the telescopic screed 12 in order to accommodate varying paving widths. It will also be appreciated that some applications where the paving width is relatively constant may be possible by manually adjusting the front fenders 13 or the paving width of the front fenders 13.
In the present embodiment, the front barrier 13 includes a main body portion 131 and a movable barrier 132 (an up-down adjustable portion of the front barrier), and the movable barrier 132 can be adjusted up and down with respect to the main body portion 131 by an actuator. However, it is also possible for the front flap 13 to be adjusted in its entirety up and down relative to the base-section screed 11 by means of a drive.
In this embodiment, a front baffle 13 height sensor in signal connection with the level controller 3 is further included, the front baffle 13 height sensor is configured to measure the height information of the movable baffle 132, and the level controller 3 is further configured to receive the height information of the movable baffle 132 and control the driver to operate according to the height information of the movable baffle 132.
Based on the paver disclosed by the invention, the invention also provides a material level control method of the paver, which comprises the following steps:
the material level sensor 2 measures the material level height information in a material containing cavity formed between the telescopic ironing plate 12 and the front baffle 13; the material level controller 3 receives the material level height information and controls the driver to work according to the material level height information;
if the material level height information is larger than the preset ideal material level height information, the material level controller 3 controls the driver to drive the vertically adjustable part of the front baffle to descend; if the material level height information is smaller than the preset ideal material level height information, the material level controller 3 controls the driver to drive the part, which can be adjusted up and down, of the front baffle to ascend.
When the front barrier 13 height sensor is provided, the front barrier 13 can be easily adjusted to a desired height, i.e., a set height, precisely according to the sensor signal. However, even when the height sensor of the front flap 13 is not provided, it is possible to control the height adjustment amount of the front flap 13 to some extent, and this can be achieved by adjusting the magnitude and/or the time period of the control signal of the level controller 3.
The ideal material level height parameter can be set by an operator on the material level sensor 2 or the material level controller 3, and the ideal material level height can be about 5 cm-10 cm higher than the bottom surface of the telescopic ironing plate 12 according to specific working conditions.
Preferably, when the level detected by the level sensor 2 is higher/lower than the ideal level, the difference between the set height of the up-and-down adjustable part (the movable baffle 132) and the current height, i.e. the adjustment amount of the front baffle 13, is proportional to the difference between the ideal level and the detected level, i.e. the level height difference.
It will be appreciated that adjusting the height of the up-down adjustable portion of the front baffle 13 (the flapper 132) does not immediately cause a change in the level, but rather there is a response lag, i.e. the level between the screed 12 and the front baffle 13 changes over time. It is therefore advantageous that after the level controller 3 has adjusted the height of the vertically adjustable part of the front baffle 13 once, it is adjusted again only after a certain time interval in order to avoid overshooting and excessively frequent adjustment.
Advantageously, the time interval is the time elapsed for the paver to travel forward a distance equal to the distance between the front apron 13 and the telescopic screed 12, when the height adjustment of the vertically adjustable part of the front apron 13 is sufficient to cause a change in the level between the telescopic screed 12 and the front apron 13. Of course longer or slightly shorter time intervals are actually possible.
The existing paver generally has a walking speed detection function, and the distance between the front baffle 13 and the telescopic ironing plate 12 can be preset in a controller, so that the time required by the paver to travel a specific distance can be easily known.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. The paver with the telescopic screed plate comprises the telescopic screed plate and is characterized by comprising a material level sensor and a material level controller, wherein the telescopic screed plate comprises a basic section screed plate and a telescopic section screed plate, the telescopic section screed plate is arranged on the rear side of the basic section screed plate and can transversely move relative to the basic section screed plate, a front baffle plate connected to the basic section screed plate is arranged on the front side of the telescopic section screed plate, at least one part of the front baffle plate can be vertically adjusted through a driver, and a material accommodating cavity is formed between the front baffle plate and the telescopic section screed plate;
the material level sensor is used for measuring the material level height information in the material containing cavity, the material level sensor is in signal connection with the material level controller, and the material level controller is used for receiving the material level height information in the material containing cavity and controlling the driver to work.
2. The paver of claim 1 further comprising a front wall height sensor in signal connection with the level controller, wherein the front wall comprises a main body portion and a movable wall that can be adjusted up and down relative to the main body portion by a driver, the front wall height sensor is configured to measure height information of the movable wall, and the level controller is further configured to receive the height information of the movable wall and control the driver to operate according to the height information of the movable wall.
3. The paving machine with a retractable screed according to claim 2, wherein the driver is a hydraulic cylinder and the front apron height sensor is a stroke sensor built into the hydraulic cylinder.
4. The paver of claim 1 further comprising an edge guard connected to the end of the telescoping screed in the width direction, the front guard being laterally movable relative to the base screed, one end of the front guard being connected to the base screed and the other end being connected to the edge guard.
5. The paving machine with the retractable screed according to claim 4, wherein the level sensor is connected to the edge guard, the level sensor being located at a center of the material cavity in a front-rear direction.
6. The paving machine with a retractable screed according to any one of claims 1-5, wherein the level sensor is an ultrasonic sensor.
7. A method for controlling the level of a spreading machine with a telescopic screed according to any one of claims 1 to 6, characterised in that it comprises the following steps:
the material level sensor measures the material level height information in a material containing cavity formed between the telescopic ironing plate and the front baffle;
the material level controller receives the material level height information and controls the driver to work according to the material level height information;
if the material level height information is larger than the preset ideal material level height information, the material level controller controls the driver to drive the vertically adjustable part of the front baffle to descend;
and if the material level height information is less than the preset ideal material level height information, the material level controller controls the driver to drive the vertically adjustable part of the front baffle to ascend.
8. The method of claim 7, further comprising the steps of:
the front baffle height sensor measures the height information of the movable baffle;
the material level controller receives the height information of the movable baffle and obtains the difference value of the height information of the movable baffle relative to the preset ideal material level height information;
and the material level controller controls the driver to drive the movable baffle plate to ascend or descend according to the difference value.
9. The method of claim 8, wherein the absolute value of the difference is the same as the value at which the flipper is raised or lowered.
10. The method as claimed in claim 7, wherein the controller controls the driver to drive the adjustable part of the front fender to ascend or descend at a certain interval after the adjustable part of the front fender ascends or descends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011145072.7A CN112230684A (en) | 2020-10-23 | 2020-10-23 | Paver with telescopic screed and material level control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011145072.7A CN112230684A (en) | 2020-10-23 | 2020-10-23 | Paver with telescopic screed and material level control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112230684A true CN112230684A (en) | 2021-01-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011145072.7A Withdrawn CN112230684A (en) | 2020-10-23 | 2020-10-23 | Paver with telescopic screed and material level control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112230684A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022083078A1 (en) * | 2020-10-23 | 2022-04-28 | 徐工集团工程机械股份有限公司道路机械分公司 | Spreader having double material level sensors and method for controlling material level height |
| CN114481762A (en) * | 2022-03-21 | 2022-05-13 | 于水丰 | Plastic ground floor material spreading machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010004785A1 (en) * | 2009-11-24 | 2011-05-26 | Dynapac Gmbh | Process and paver for the production of a road surface |
| CN102704384A (en) * | 2012-06-27 | 2012-10-03 | 中联重科股份有限公司 | Striker plate for paver and paver |
| CN103399586A (en) * | 2013-07-16 | 2013-11-20 | 厦工(三明)重型机器有限公司 | Method and system for controlling material level of paver |
| CN103411647A (en) * | 2013-07-18 | 2013-11-27 | 江苏华通动力重工有限公司 | Paver starved feeding alarm control system and control method |
| CN105951568A (en) * | 2016-06-28 | 2016-09-21 | 徐州雷泽机械科技有限公司 | Independently controlled two-end telescopic ironing plate |
| CN207362643U (en) * | 2017-10-17 | 2018-05-15 | 徐工集团工程机械股份有限公司 | A kind of paver material-distributing system for improving sub-material material position stationarity |
-
2020
- 2020-10-23 CN CN202011145072.7A patent/CN112230684A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010004785A1 (en) * | 2009-11-24 | 2011-05-26 | Dynapac Gmbh | Process and paver for the production of a road surface |
| CN102704384A (en) * | 2012-06-27 | 2012-10-03 | 中联重科股份有限公司 | Striker plate for paver and paver |
| CN103399586A (en) * | 2013-07-16 | 2013-11-20 | 厦工(三明)重型机器有限公司 | Method and system for controlling material level of paver |
| CN103411647A (en) * | 2013-07-18 | 2013-11-27 | 江苏华通动力重工有限公司 | Paver starved feeding alarm control system and control method |
| CN105951568A (en) * | 2016-06-28 | 2016-09-21 | 徐州雷泽机械科技有限公司 | Independently controlled two-end telescopic ironing plate |
| CN207362643U (en) * | 2017-10-17 | 2018-05-15 | 徐工集团工程机械股份有限公司 | A kind of paver material-distributing system for improving sub-material material position stationarity |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022083078A1 (en) * | 2020-10-23 | 2022-04-28 | 徐工集团工程机械股份有限公司道路机械分公司 | Spreader having double material level sensors and method for controlling material level height |
| CN114481762A (en) * | 2022-03-21 | 2022-05-13 | 于水丰 | Plastic ground floor material spreading machine |
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Application publication date: 20210115 |
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