Control system and method of road edge cutting device

Abstract

The invention discloses a control system and method for a road edge cutting device, and the system comprises a data obtaining device which is used for obtaining the hydraulic oil pressure of a hydraulic circuit in the descending process of an edge cutting blade; and the controller is used for controlling the edge cutting blade to stop descending when the hydraulic oil pressure of the hydraulic loop is greater than a set pressure threshold value in the descending process of the edge cutting blade. And the edge cutting blade can be effectively prevented from being damaged when encountering resistance in the descending process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-hydraulic control, and in particular to a control system and method of a road edge cutting device. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] Generally, when paving the asphalt layer of a newly built road, the paving machine is used to pave the asphalt, and then the double-steel-wheel road roller is used to compact the asphalt layer. Since the paving machine is relatively wide and inconvenient to move left and right, the asphalt on the left and right edges of the road is generally uneven after paving, and needs to be manually repaired, that is, the material is supplemented at the material-deficient position, and the excess asphalt material is cut off to maintain the integrity and straightness of the asphalt pavement on both sides of the road, and to facilitate the installation of marble curb stones on both sides of the asphalt road. Manually repairing the edges of the asphalt pavement is time-consuming and labor-intensive, has high labor costs, and the effect is generally poor.

[0004] In related technologies, a cutting device is also added to the double-steel-wheel road roller, and the cutting device is used to cut the edges of the road.

[0005] However, when cutting the edges using the cutting device, the cutting blade is only controlled by whether it is lowered in place. When the cutting blade encounters an obstacle during the lowering process, the cutting blade continues to be controlled, which can easily damage the cutting blade. SUMMARY

[0006] To solve the above problems, the present application provides a control system and method of a road edge cutting device, which can effectively prevent the cutting blade from being damaged on the basis of automatic edge cutting.

[0007] To achieve the above object, the present application adopts the following technical solutions: In a first aspect, the present application provides a control system of a road edge cutting device, comprising: a data acquisition device configured to acquire the hydraulic oil pressure of the hydraulic circuit during the lowering process of the cutting blade; a controller configured to control the cutting blade to stop lowering when the hydraulic oil pressure of the hydraulic circuit is greater than a set pressure threshold during the lowering process of the cutting blade.

[0008] Further, the data acquisition device is further configured to acquire the lowering depth of the cutting blade; the controller is further configured to control the cutting blade to stop lowering when the lowering depth of the cutting blade is greater than or equal to the maximum allowable lowering depth.

[0009] Further, the data acquisition device is further configured to acquire the lifting height of the cutting blade; The controller is further configured to control the trimming blade to stop rising when the rising height of the trimming blade is greater than or equal to the maximum allowed rising height.

[0010] Further, the controller is further configured to, when the lateral movement instruction of the trimming blade is obtained, first control the trimming blade to move to the maximum allowed rising height, and then control the trimming blade to move laterally.

[0011] Further, the controller is further configured to control the water spraying device to spray water to the trimming blade when the trimming blade starts to rotate.

[0012] Further, the controller is further configured to control the alarm device to start alarming when the trimming blade starts to rotate.

[0013] Further, the controller is further configured to control the water spraying device to stop spraying water to the trimming blade when the trimming blade stops rotating.

[0014] Further, the controller is further configured to control the alarm device to stop alarming when the trimming blade stops rotating.

[0015] Further, the controller is further configured to obtain the trimming switch signal, determine the lifting control instruction of the trimming blade according to the trimming switch signal, and control the trimming blade to rise or fall according to the lifting control instruction of the trimming blade.

[0016] In a second aspect, the present application provides a control method of a road trimming device, comprising: During the descending process of the trimming blade, the hydraulic oil pressure of the hydraulic circuit during the descending process of the trimming blade is obtained. The controller is configured to control the trimming blade to stop descending when the hydraulic oil pressure of the hydraulic circuit is greater than a set pressure threshold during the descending process of the trimming blade.

[0017] Compared with the prior art, the present application has the following beneficial effects: The present application provides a control system and method of a road trimming device, the system comprising a data acquisition device and a controller; the data acquisition device is configured to obtain the hydraulic oil pressure of the hydraulic circuit during the descending process of the trimming blade; the control system is configured to control the trimming blade to stop descending when the hydraulic oil pressure of the hydraulic circuit is greater than a set pressure threshold during the descending process of the trimming blade; and the trimming blade can be effectively prevented from being damaged when encountering resistance during the descending process.

[0018] The advantages of the additional aspects of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, 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.

[0020] Figure 1 A schematic diagram of a control system of a road edge cutting device according to the present application.

[0021] Wherein: 1, battery, 2, edge cutting switch, 3, controller, 4, water pump, 5, rising electromagnetic valve, 6, falling electromagnetic valve, 7, left electromagnetic valve, 8, right electromagnetic valve, 9, distance sensor, 10, pressure sensor, 11, voice alarm, 12, hydraulic pump, 13, hydraulic valve group, 14, left and right oil cylinder, 15, up and down oil cylinder, 16, edge cutting blade, 17, sprinkler, 18, left and right adjustment switch. DETAILED DESCRIPTION

[0022] The application will be further described below in conjunction with the drawings and embodiments.

[0023] It should be noted that the following detailed description is illustrative only, and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0024] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0025] In the present application, the terms such as "fixedly connected", "connected", "connected" and the like should be understood broadly, which means that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant researchers or technicians in the art, the specific meaning of the above terms in the present application can be determined according to the specific circumstances, and should not be understood as a limitation on the present application.

[0026] Firstly, the application scenario of a control system of a road edge cutting device according to the present application is described in detail.

[0027] Generally, when paving the asphalt layer of a newly built highway, the asphalt is first paved by a paving machine, and then the asphalt surface layer is compacted by a double steel wheel roller.

[0028] The paver is a construction equipment mainly used for paving various materials on the base layer and surface layer of the highway. It is a mechanical equipment for paving work by cooperating with various systems, mainly including a walking system, a hydraulic system, a conveying and distributing system, etc.

[0029] The double-steel-wheel road roller is a kind of road surface mechanical equipment in engineering machinery, which is used for compacting the road by two steel wheels. The steel wheels work together in front and back. It is suitable for compacting various materials on the base layer, the secondary base layer and the asphalt surface layer, and is an indispensable compacting mechanical equipment for highway, municipal and national defense construction.

[0030] Since the paver is relatively wide and inconvenient to move left and right, the asphalt on the left and right edges of the road is generally uneven after paving, and needs to be repaired manually, that is, the material is supplemented at the material shortage position, and the excess asphalt material is cut off to maintain the integrity and straightness of the asphalt pavement on both sides of the road, and to facilitate the installation of marble curb stones on both sides of the asphalt road. Artificially repairing the edge of the asphalt pavement is time-consuming and labor-intensive, and the effect is generally poor.

[0031] In the related art, a cutting edge device is also installed on the double-steel-wheel road roller, and the cutting edge device is used to cut the edge of the road.

[0032] However, when cutting the edge by using the cutting edge device, the cutting edge blade is only controlled by whether it is lowered in place. When the cutting edge blade encounters an obstacle during the lowering process, the cutting edge blade is continuously controlled, which is easy to damage the cutting edge blade.

[0033] The control system of the road cutting edge device provided by the application is applied to the cutting edge device installed on the double-steel-wheel road roller. The cutting edge device comprises a cutting edge blade 16, left and right oil cylinders 14, up and down oil cylinders 15, a hydraulic pump 12, a hydraulic valve group 13, a water pump 4 and a water spraying head 17. The cutting edge blade 16 is connected with the left and right oil cylinders 14, and the left and right oil cylinders 14 can drive the cutting edge blade 16 to move left or right. The cutting edge blade 16 and the left and right oil cylinders 14 are connected with the up and down oil cylinders 15 as a whole, and the up and down oil cylinders 15 can drive the cutting edge blade 16 and the left and right oil cylinders 14 as a whole to move up or down.

[0034] The left and right oil cylinders 14 and the up and down oil cylinders 15 are connected with the hydraulic valve group 13, the hydraulic valve group 13 is connected with the hydraulic pump 12, the hydraulic pump 12 pumps hydraulic oil into the hydraulic valve group 13, the hydraulic oil is distributed by the hydraulic valve group 13, and then enters the up and down oil cylinders 15 or the left and right oil cylinders 14, so as to control the cutting edge blade 16 to rise, fall, move left or right.

[0035] The water pump 4 and the sprinkling head 17 constitute a sprinkling device, during the operation of the trimming blade, the water pump 4 pumps water into the sprinkling head 17, and the sprinkling head 17 sprays water onto the trimming blade to cool the trimming blade.

[0036] A water pump is a machine that delivers or increases liquid.

[0037] A hydraulic pump is a power element of a hydraulic system, which is driven by an engine or a motor, sucks oil from a hydraulic oil tank, forms pressure oil, and discharges to an execution element.

[0038] A hydraulic valve group is a key element for controlling the flow direction, pressure and flow of oil in a hydraulic system, which is composed of a valve body, a valve core and a driving part. According to the function, it is divided into direction control valves, flow control valves and pressure control valves. The structure forms such as stop type, the valve body materials include cast steel, stainless steel, low temperature steel, etc., and the driving mode contains manual, electric, hydraulic.

[0039] An oil cylinder is a key component in the steering system of engineering machinery and vehicles, which realizes the linear action of the component and ensures the flexible operation of the equipment. The hydraulic oil cylinder is a kind of working device which realizes the action by using hydraulic oil.

[0040] The trimming blade is a circular cutting blade made of metal material and provided with sawteeth.

[0041] Sprinkling head: very close to the meaning of nozzle, it is a component for outputting water outward.

[0042] On the basis, the control system of the road trimming device also includes a data acquisition device and a controller. The controller is an indispensable part of the automation system. It produces corresponding output signals by accepting input signals from sensors or other devices, and according to the preset control strategy and algorithm, so as to realize the accurate control of the controlled object. With the development of science and technology, the intelligentization and networking of the controller will become an important trend in the future development.

[0043] The data acquisition device is used for acquiring the hydraulic oil pressure of the hydraulic circuit during the descending process of the trimming blade. The controller is used for controlling the trimming blade to stop descending when the hydraulic oil pressure of the hydraulic circuit is greater than the set pressure threshold during the descending process of the trimming blade.

[0044] By detecting the hydraulic oil pressure of the hydraulic circuit during the descending process of the trimming blade, whether the trimming blade meets resistance during the descending process can be judged. When the hydraulic oil pressure of the hydraulic circuit is greater than the set pressure threshold, it indicates that the descending of the trimming blade is blocked, and the descending of the trimming blade is controlled to stop at this time, which can effectively prevent the trimming blade from being damaged.

[0045] In addition, the data acquisition device of the application is also used for acquiring the descending depth of the trimming blade; The controller is also used for controlling the trimming blade to stop descending when the descending depth of the trimming blade is greater than or equal to the maximum allowed descending depth.

[0046] The data acquisition device is also used for acquiring the ascending height of the trimming blade; The controller is also used for controlling the trimming blade to stop ascending when the ascending height of the trimming blade is greater than or equal to the maximum allowed ascending height.

[0047] By limiting the maximum descending depth and the maximum ascending height of the trimming blade, the excessive descending or ascending of the trimming blade is prevented.

[0048] The data acquisition device comprises a distance sensor 9 and a pressure sensor 10. A sensor is a detection device that can sense the information of a measured object and convert the sensed information into an electrical signal or other required form of information output according to a certain rule to meet the requirements of information transmission, processing, storage, display, recording and control. The distance sensor is a detection device for detecting the distance between two objects.

[0049] A pressure sensor is a device or apparatus that can sense a pressure signal and convert the pressure signal into an electrical signal according to a certain rule.

[0050] The distance sensor 9 in the application is used for acquiring the ascending height and the descending depth of the trimming blade.

[0051] The pressure sensor 10 is used for acquiring the hydraulic oil pressure in the hydraulic circuit, where the hydraulic circuit refers to the hydraulic circuit between the hydraulic valve group 13 and the up and down oil cylinder 15.

[0052] The control system of the road trimming device provided by the application further comprises a trimming switch 2, left and right adjusting switches 18, a storage battery 1, an ascending electromagnetic valve 5, a descending electromagnetic valve 6, a left electromagnetic valve 7, a right electromagnetic valve 8 and an alarm device; the alarm device can adopt a voice alarm 11.

[0053] A storage battery is an electrochemical device that stores chemical energy and releases electrical energy when necessary.

[0054] The storage battery 1 supplies power for the control system provided by the application; the trimming switch 2 and the left and right adjusting switches 18 are connected with the controller 3, and the trimming switch 2 and the left and right adjusting switches 18 all adopt a rocker switch with three states to control the on-off of the circuit; the trimming switch 2 and the left and right adjusting switches 18 both are three-state self-resetting switches.

[0055] Solenoid valve is an electromagnetic control industrial equipment, is used to control the fluid automation basic element, belongs to actuator, and is not limited to hydraulic, pneumatic. Used in industrial control system to adjust the direction of medium, flow, speed and other parameters.

[0056] The user can send the cutting blade up or down instruction by operating the trimming switch 2, and send the horizontal moving instruction of the cutting blade moving left or right by operating the left and right adjusting switch 18.

[0057] The controller of the application is also used to acquire the trimming switch signal, determine the lifting control instruction of the cutting blade according to the trimming switch signal, and control the cutting blade to rise or fall according to the lifting control instruction of the cutting blade.

[0058] The controller is also used to acquire the horizontal moving instruction of the cutting blade, first control the cutting blade to move to the maximum allowed rising height, and then control the cutting blade to move horizontally, so as to prevent the cutting blade from moving left and right when it is in the ground or the asphalt, and damage the cutting blade.

[0059] The controller is also used to control the sprinkler to sprinkle water on the cutting blade when the cutting blade starts to rotate.

[0060] The controller is also used to control the sprinkler to stop sprinkling water on the cutting blade when the cutting blade stops rotating. By sprinkling water on the cutting blade in working state, the cutting blade is cooled to prevent overheating and damage.

[0061] The controller is also used to control the alarm device to start alarming when the cutting blade starts to rotate.

[0062] The controller is also used to control the alarm device to stop alarming when the cutting blade stops rotating.

[0063] During the working process of the cutting blade, the alarm device can effectively remind the surrounding personnel to pay attention to the construction safety.

[0064] The controller of the application receives the trimming switch and left-right adjusting switch signals, controls the on-off of four electromagnetic valves, i.e., the up electromagnetic valve, the down electromagnetic valve, the left electromagnetic valve and the right electromagnetic valve. The electromagnetic valves are installed on the hydraulic valve group and control the actions of two oil cylinders, i.e., the left-right oil cylinder and the up-down oil cylinder. The controller outputs signals to the water pump to control the operation of the water pump. The cooling water is sprayed to the trimming blade through the water spraying nozzle to prevent the blade from overheating. The controller outputs signals to the voice alarm to emit warning sound to remind the people around the vehicle to pay attention to the construction safety. The distance sensor collects the up and down heights of the trimming blade and transmits the data to the controller to control the output signals of the controller to control the movement of the up-down oil cylinder. The pressure sensor collects the hydraulic oil pressure value of the hydraulic hose loop and feeds back to the controller, and the controller outputs signals to control the movement of the up-down oil cylinder. The feedback signals of the distance sensor and the pressure sensor jointly control the down movement of the trimming blade to prevent the damage of the blade.

[0065] The control system of the road trimming device provided by the application controls the down movement of the trimming blade as follows: The trimming switch selects the down gear (three-position self-resetting switch) --- the controller receives the down command of the trimming blade, outputs signals to the down electromagnetic valve, the down electromagnetic valve is powered on, and the up-down oil cylinder moves downward to push the trimming blade to move downward; during the down movement of the trimming blade, the distance sensor detects the down depth of the trimming blade in real time, and when the maximum allowable down depth (for example, the maximum allowable down depth is set to 200mm) is reached, the trimming blade stops down, that is, even if the trimming switch is always in the down gear, the trimming blade will not continue to down. At this time, the vehicle is in the forward movement state, the trimming blade has penetrated into the asphalt and starts to rotate, at this time, the water pump has started to work, the water spraying nozzle continuously sprays water to the trimming blade, and at the same time, the voice alarm also starts to ring to remind the people around to pay attention to the construction safety. The working trigger conditions of the water pump and the voice alarm are that the trimming blade starts to rotate.

[0066] The control process of the up movement of the trimming blade is as follows: The trimming switch selects the upward gear (three-position self-resetting switch) --- the controller receives the upward movement instruction of the trimming blade, and outputs the signal to the upward electromagnetic valve. The upward electromagnetic valve is powered on, and the up and down oil cylinder moves upward to push the trimming blade upward. During the upward movement of the trimming blade, the distance sensor detects the upward height of the trimming blade in real time. When the maximum allowable upward height (for example, the maximum allowable upward height is 50 mm) is reached, the trimming blade stops upward movement. At this time, the vehicle is in forward state, the trimming blade has separated from the asphalt and stopped rotating, the water pump stops working, the water spray head stops spraying water on the trimming blade, and the voice alarm stops ringing. The triggering condition for stopping the water pump and the voice alarm is that the trimming blade stops rotating.

[0067] During construction, if the trimming blade encounters hard asphalt or ground (such as hard obstacles) during work and cannot be cut off, the trimming blade will lift up the front steel wheel blade side (usually the right side of the front steel wheel). At this time, the hydraulic oil pressure value in the hydraulic pipeline will continue to increase due to the very heavy weight of the front steel wheel of the whole vehicle. In order to prevent damage to the hydraulic system and the trimming blade, the pressure sensor detecting the hydraulic circuit pressure value will feed back the collected hydraulic oil pressure data to the controller (the controller will set a pressure threshold, such as 100Kp). When the collected hydraulic oil pressure is greater than the set pressure threshold, the controller stops outputting the downward signal to the downward electromagnetic valve, at this time the downward oil cylinder also stops downward movement, the trimming blade stops downward movement, and the hydraulic system and the trimming blade are protected from damage.

[0068] The process of controlling the trimming blade to move left is as follows: The left-right adjustment switch selects the left gear (three-position self-resetting switch) --- the controller receives the leftward transverse movement control instruction of the trimming blade, and outputs the signal to the left electromagnetic valve. The left electromagnetic valve is powered on, and the left and right oil cylinders move left to drive the trimming blade to move left. When the trimming blade moves to the minimum retraction amount of the left and right oil cylinders, the trimming blade stops moving left.

[0069] The process of controlling the trimming blade to move right is as follows: The left-right adjustment switch selects the right gear (three-position self-resetting switch) --- the controller receives the rightward transverse movement control instruction of the trimming blade, and outputs the signal to the right electromagnetic valve. The right electromagnetic valve is powered on, and the left and right oil cylinders move right to drive the trimming blade to move right. When the trimming blade moves to the maximum extension amount of the left and right oil cylinders, the trimming blade stops moving right.

[0070] Note: in order to protect the safety of the trimming blade, the precondition for the left and right movement of the trimming blade is that the trimming blade is separated from the asphalt and suspended (to prevent the trimming blade from moving left and right when it is in the ground or inside the asphalt, damaging the trimming blade), that is, the trimming blade is in the maximum allowed lifting height (for example, the maximum lifting height is 50mm) position, and then the left and right movement can be performed. The precondition of this movement process is realized through the controller program, that is, when the controller receives the left or right transverse movement instruction of the trimming blade, it first judges whether the trimming blade is in the maximum allowed lifting height position, if yes, it controls the trimming blade to move left or right, if not, it first controls the trimming blade to move upward to the maximum allowed lifting height position, and then controls the trimming blade to move left or right.

[0071] The control system of the road trimming device provided by the application greatly reduces the labor cost while effectively improving the working efficiency and operation quality of the road roller, ensures the flatness and beauty of the road edge line, saves time and effort, perfectly realizes the straightness and beauty of the asphalt pavement, greatly reduces the labor cost while effectively improving the working efficiency of the equipment.

[0072] In addition, the control system of the road trimming device provided by the application can be used on all engineering machinery with trimming function in addition to double-steel-wheel road rollers and single-steel-wheel road rollers.

[0073] The application further provides a control method of a road trimming device, comprising: During the descending process of the trimming blade, the hydraulic oil pressure of the hydraulic circuit during the descending process of the trimming blade is acquired; The controller is used for controlling the trimming blade to stop descending when the hydraulic oil pressure of the hydraulic circuit is greater than the set pressure threshold during the descending process of the trimming blade.

[0074] Although the specific embodiments of the application are described above with reference to the drawings, the description is not a limitation on the scope of protection of the application, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical solutions of the application without creative labor are still within the scope of protection of the application.

Claims

1. A control system for a road edging device, characterized in that The application relates to a cutting edge control method and device. The data acquisition device is used for acquiring the hydraulic oil pressure of the hydraulic circuit during the cutting edge descending process. The controller is used for controlling the cutting edge to stop descending when the hydraulic oil pressure of the hydraulic circuit is greater than a set pressure threshold during the cutting edge descending process.

2. A control system for a road edging device as claimed in claim 1, characterised in that, The data acquisition device is also used for acquiring the descending depth of the cutting edge. The controller is also used for controlling the cutting edge to stop descending when the descending depth of the cutting edge is greater than or equal to the maximum allowed descending depth.

3. A control system for a road edging device as claimed in claim 1, characterized in that The data acquisition device is also used for acquiring the ascending height of the cutting edge. The controller is also used for controlling the cutting edge to stop ascending when the ascending height of the cutting edge is greater than or equal to the maximum allowed ascending height.

4. A control system for a road edging device as claimed in claim 1, characterized in that The controller is also used for controlling the cutting edge to move to the maximum allowed ascending height first and then to move laterally when the lateral movement instruction of the cutting edge is acquired.

5. A control system for a road edging device as claimed in claim 1, characterized in that The controller is also used for controlling the water spraying device to spray water to the cutting edge when the cutting edge starts rotating.

6. A control system for a road edging device as claimed in claim 1, characterized in that The controller is also used for controlling the water spraying device to stop spraying water to the cutting edge when the cutting edge stops rotating.

7. A control system for a road edging device as claimed in claim 1, characterized in that The controller is also used for controlling the alarm device to start alarming when the cutting edge starts rotating.

8. A control system for a road edging device as claimed in claim 1, characterized in that The controller is also used for controlling the alarm device to stop alarming when the cutting edge stops rotating.

9. A control system for a road edging device as claimed in claim 1, characterized in that The controller is also used for acquiring the cutting edge switch signal, determining the ascending and descending control instruction of the cutting edge according to the cutting edge switch signal, and controlling the cutting edge to ascend or descend according to the ascending and descending control instruction of the cutting edge.

10. A control method of a road edge cutting device, characterized by, The application relates to a cutting edge control method and device. The data acquisition device is used for acquiring the hydraulic oil pressure of the hydraulic circuit during the cutting edge descending process. The controller is used for controlling the cutting edge to stop descending when the hydraulic oil pressure of the hydraulic circuit is greater than a set pressure threshold during the cutting edge descending process.

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