CN110203124B - Traction device for preventing side turning based on tank truck and control method thereof - Google Patents
Traction device for preventing side turning based on tank truck and control method thereof Download PDFInfo
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- CN110203124B CN110203124B CN201910435203.6A CN201910435203A CN110203124B CN 110203124 B CN110203124 B CN 110203124B CN 201910435203 A CN201910435203 A CN 201910435203A CN 110203124 B CN110203124 B CN 110203124B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/22—Tank vehicles
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Abstract
The invention discloses a traction device for preventing side turning based on a tank truck and a control method thereof, wherein the device is provided with a control module, a disc type groove supporting device and a ball head traction device additionally provided with two electronic hydraulic cylinders, the two electronic hydraulic cylinders are close to the trailer part, and the disc type groove supporting device is provided with an inlet and an outlet, so that the influence can not be caused when the trailer is connected with a tractor and a vehicle turns, and the free stroke of the electronic hydraulic cylinders is arranged in the disc type groove supporting device, so that the influence on the normal jolting state of the vehicle in the running state can not be caused; the control module monitors the side inclination angle of the liquid tank truck, when the liquid tank truck is about to turn on side, the control module calculates the height required to be increased of the electronic hydraulic cylinder in real time according to the side inclination angle and sends a signal, the electronic hydraulic cylinder receives the signal to increase the lifting rod to the accurate height, the vehicle is supported, and the problem that the existing traction device cannot support when the side inclination angle of the vehicle is too large or too small is solved effectively.
Description
Technical Field
The invention belongs to the field of semitrailer tank trucks, and particularly relates to a traction device for preventing a tank truck from tilting and rolling over and a control method thereof.
Background
At present, the main ways of transporting hazardous chemicals include sea transportation and land transportation. Wherein, the main carrier for land transportation is a tank truck. When the tank truck is overspeed, over-bent or emergently avoided, major traffic accidents of side turning often occur due to the high height of the mass center and the large load of the tank truck. The size and the load capacity of the tank truck are large, so that the adjacent lanes can be seriously affected when the tank truck turns on one side, and serious accidents such as congestion and even serious rear-end collision of multiple vehicles are caused. In addition, most of the loading media of the tank truck are dangerous chemicals, and leakage occurs when the tank truck turns on one side, so that economic loss is caused, and lives of surrounding people are endangered.
The traction devices of the tank trucks known at present mainly comprise the following types:
the utility model provides a bulb tractor, has traction seat and traction lever, is provided with a spheroidal bulb on the traction seat, and the bulb top has a locking piece, and the locking piece front end passes through the articulated shaft and articulates on traction seat and can wind articulated shaft tilting, still is provided with the locking mechanical system that can lock the locking piece in the position directly over the bulb on traction seat, and the traction lever front end is provided with a lower extreme open-ended sphere chamber, and the sphere diameter in sphere chamber cooperatees with the bulb to can the lock on the bulb. The method only changes the components on the original basis, so that the connection process is more convenient and flexible, and active control cannot be implemented when the vehicle is in a dangerous working condition of side turning and side tilting.
The utility model provides a civil engineering construction tractor, when meetting the condition that the trailer takes place to overturn, the trailer can drive and pull the automobile body and also take place to overturn, at this moment, pull on the automobile body and the connecting device between the trailer open the supporting device who wraps up the main shaft, realize the trailer and pull the separation between the automobile body, make pull the automobile body not in because the phenomenon that the overturning takes place for the overturning of trailer, ensured the security of the lives and property of personnel in the traction automobile body. The method only separates the tractor from the trailer after the vehicle turns over, avoids personal injury to a driver, and like the method, cannot implement active control under dangerous working conditions that the vehicle is about to turn over and roll.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a traction device for preventing side turning of a tank truck and a control method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
a traction device for preventing side turning of a tank truck comprises a ball head traction device arranged at the position of a tractor, wherein a first electronic hydraulic cylinder and a second electronic hydraulic cylinder are fixed at one end of a bottom plate of the ball head traction device, the upper end of the bottom plate is connected with a fixed plate through a bolt, the upper end of the fixed plate is connected with a hinge through a bolt, and the upper end of the hinge is welded with a traction plate; the first electronic hydraulic cylinder and the second electronic hydraulic cylinder respectively comprise an electronic hydraulic cylinder upper supporting plate, a middle cylinder body, a cylinder body bottom supporting plate and a lifting cylinder body, the cylinder body bottom supporting plate is arranged on the outer wall of the middle cylinder body, and the electronic hydraulic cylinder upper supporting plate is arranged at the upper end of the lifting cylinder body; the trailer is characterized by further comprising a disc type groove supporting device fixed at the bottom of the trailer, wherein the opening direction of a groove of the disc type groove supporting device is downward, a pair of annular bulges are respectively arranged on two side walls in the groove of the disc type groove supporting device, the groove of the disc type groove supporting device is in an I-shaped structure, and the upper surface of the disc type groove supporting device is a groove supporting plate; the annular inner wall of the disc type groove supporting device is further provided with a pair of inlets and outlets, the opening direction of the inlets and outlets faces the ball head traction device, the opening width of the inlets and outlets is matched with the cylinder body diameters of the first electronic hydraulic cylinder and the second electronic hydraulic cylinder, and the inlets and outlets are matched with the positions of the first electronic hydraulic cylinder and the second electronic hydraulic cylinder;
the disc type groove supporting device is characterized in that a free stroke is reserved in the disc type groove supporting device, and the calculation formula of the reserved free stroke is as follows:
h1＝H-d1-d2-d3-d4-d5+2·L·sin θ
h2＝d4+2·L·sin θ
in the formula, h1The first free stroke from the upper surface of the annular bulge of the groove side wall of the disc type groove supporting device to the groove supporting plate is realized; h is the vertical distance from the upper surface of a traction plate of the ball head traction device to the upper surface of a cylinder body bottom support plate in a static state after the tractor is connected with the trailer; d1The thickness of the groove supporting plate of the disc type groove supporting device is set; d2The thickness of the upper support plate of the electronic hydraulic cylinder; d3The thickness of the annular protrusion of the groove side wall of the disc-type groove supporting device; d4The height of the middle cylinder body in the initial state of the electronic hydraulic cylinder; d5The thickness of the supporting plate at the bottom of the cylinder body; l is the vertical distance from the front end of a traction plate of the ball head traction device to a straight line where a hinge of the ball head traction device is located; theta is the maximum inclination angle of a traction plate of the ball head traction device and a bottom plate of the ball head traction device in a bumpy state after the trailer is connected with the tractor; h is2The second free stroke of the disc type groove supporting device is the vertical distance from the lower surface of the annular bulge of the groove side wall of the disc type groove supporting device to the bottom plate of the ball head traction device.
Preferably, the traction device further comprises a control module, wherein the control module is fixed on the tank truck, electrically connected with the first electronic hydraulic cylinder and the second electronic hydraulic cylinder, and used for controlling the lifting of the first electronic hydraulic cylinder and the second electronic hydraulic cylinder.
Preferably, the control module comprises a rollover monitoring unit, a driving pressure control unit and a controller, wherein the rollover monitoring unit is arranged below the trailer frame of the tank truck and is in signal connection with the controller; the driving pressure control unit is fixed at the bottom of the tractor and is connected with the first electronic hydraulic cylinder, the second electronic hydraulic cylinder and the controller through lines.
Preferably, the driving pressure control unit comprises a medium power source, a first electromagnetic valve, a second electromagnetic valve, a pressure sensor and a driving motor for providing power; the output shaft of the driving motor is fixed at the input end of the medium power source, the output end of the medium power source is connected with the first electromagnetic valve and the second electromagnetic valve through a pressure sensor, the first electromagnetic valve is connected with the first electronic hydraulic cylinder and the controller through lines, and the second electromagnetic valve is connected with the second electronic hydraulic cylinder and the controller through lines.
Preferably, the rollover monitoring unit is a gyroscope sensor and is fixed in the middle position below the trailer frame.
A control method of the traction device for preventing the tank truck from side turning comprises the following steps:
step 1, reserving a free stroke in a disc type groove supporting device according to the bumping angle of a tank truck on a bumpy road surface, so that the normal operation of a vehicle is facilitated and the first electronic hydraulic cylinder and the second electronic hydraulic cylinder are prevented from being damaged;
step 2, taking the roll angle of the tank truck when one side wheel lifts off the ground as a threshold value P, and presetting that the left side wheel lifts off the ground as a negative angle and the right side wheel lifts off the ground as a positive angle in a rollover monitoring unit;
step 3, when the side inclination angle of the tank truck detected by the side-turning monitoring unit is more than or equal to P or less than or equal to-P, the side-turning monitoring unit transmits a side-turning signal to the controller;
step 4, after the controller receives the side turning signal, if the side inclination angle is larger than or equal to P, the controller controls the first electromagnetic valve to be electrified, and driving pressure is provided to the first electronic hydraulic cylinder through the medium power source, so that the first electronic hydraulic cylinder is lifted to a target amount; then the controller controls the first electromagnetic valve to be powered off to realize the side turning support of the tank truck; if the pressure is less than or equal to-P, controlling the second electromagnetic valve to be electrified, wherein the principle is the same as that of the first electromagnetic valve;
and 5, after the body of the tank truck returns to the right state, when the side inclination angle of the tank truck monitored by the side-turning monitoring unit is less than P, the controller controls the first electromagnetic valve to be electrified, so that the first electronic hydraulic cylinder returns to the normal state, then the first electromagnetic valve is powered off, and if the side inclination angle of the tank truck monitored by the side-turning monitoring unit is greater than-P, the controller controls the second electromagnetic valve to be electrified, wherein the principle is the same as that of the first electromagnetic valve.
Preferably, in step 4, the calculation formula of the target lifting amount of the first electronic hydraulic cylinder or the second electronic hydraulic cylinder is as follows:
in the formula, h3The target lifting amount of the first electronic hydraulic cylinder or the second electronic hydraulic cylinder is obtained; h is1A first free stroke of the disc groove supporting device; d is the width of the trailer body of the trailer; and delta is the side inclination angle of the tank truck monitored by the side turning monitoring unit.
Preferably, in step 4, in order to make the hydraulic lifting device reach the target lifting amount, the energization time of the first or second solenoid valve is:
in the formula, t is the electrifying time of the first or second electromagnetic valve; h is3The target lifting amount of the first electronic hydraulic cylinder or the second electronic hydraulic cylinder is obtained; m is1The weight of the upper support plate of the electronic hydraulic cylinder of the first electronic hydraulic cylinder and the second electronic hydraulic cylinder; m is2The weight of the lifting cylinder body of the first electronic hydraulic cylinder and the second electronic hydraulic cylinder; g is the acceleration of gravity; p is driving pressure of a driving device; s is the cross sectional area of the lifting cylinder body of the first electronic hydraulic cylinder and the second electronic hydraulic cylinder; a is the moving acceleration of the lifting cylinder.
Compared with the prior art, the invention has the beneficial effects that:
1. the pair of electronic hydraulic cylinders is additionally arranged on the original ball head traction device, so that the tank truck can actively control the rollover condition by lifting the electronic hydraulic cylinders under the rollover condition.
2. The bottom of the trailer is provided with the disc type groove supporting device, and holes are formed according to the installation position of the electronic hydraulic cylinder, so that the damage of the internal structure of the electronic hydraulic cylinder caused by the angle formed by the trailer and the tractor under the conditions of normal bumpy road surface, turning and slight side inclination of the vehicle is avoided, and the influence on the normal operation condition of the vehicle is also avoided;
3. a certain height d is reserved at the upper part of the disc type groove supporting device, and the groove is arranged in an I shape, so that the vertical extrusion cannot be caused when a vehicle runs on a bumpy road surface; the design of the groove enables the vehicle to freely rotate when the vehicle turns, and the influence on the trafficability characteristic of the vehicle during turning is avoided;
4. the rollover monitoring unit adopts the gyroscope sensor, has high sensitivity, can provide vehicle implementation side inclination angle information to the controller in time, and can facilitate the control module to control the lifting of the electronic hydraulic cylinder to prevent the tank truck from rollover.
5. The control module controls the lifting of the electronic hydraulic cylinder in real time through the rollover monitoring unit and the electromagnetic valve, and numerically and accurately controls the lifting height and the opening time of the electromagnetic valve, so that the rollover of the tank truck can be prevented in real time;
6. the control method of the invention calculates the target lifting amount of the electronic hydraulic cylinder in real time according to the side inclination angle by comparing the side inclination angle of the tank truck with the threshold value P, and controls the electronic hydraulic lifting device to lift when the side inclination angle is larger than or equal to the threshold value P; when the roll angle is less than the threshold value P, the electronic hydraulic lifting device is actively lowered when the vehicle returns, so that the tank truck can normally run after dangerous treatment, the influence on the trafficability characteristic of the vehicle is avoided, the tank truck can be timely supported during subsequent rollover, and the electronic hydraulic lifting device can also play a role in traction in the normal running state of the vehicle.
Drawings
FIG. 1 is a perspective view of a ball nose hitch of the present invention;
FIG. 2 is a perspective view of the disc groove support assembly of the present invention in the area of a trailer;
FIG. 3 is a schematic view of the connection structure of the ball head traction device and the disc groove supporting device of the invention;
FIG. 4 is a schematic structural diagram of an electronic hydraulic cylinder of the device of the present invention;
FIG. 5 is a schematic diagram of the construction of the disc groove support assembly of the present invention in the trailer area;
FIG. 6 is a schematic view of a connecting structure of a mechanical part and a driving pressure control unit of the novel anti-rollover traction device of the tank truck in the embodiment of the invention;
FIG. 7 is a state diagram of the side-turning traction device of the tank truck of the invention;
FIG. 8 is a control flow chart of the novel anti-rollover traction device of the tank truck in the embodiment of the invention.
In the figure: 1-a bottom plate; 2, fixing a plate; 3-a hinge; 4-handle; 5-operating rod; 6-a gasket; 7-mounting a plate; 8-a traction plate; 9-ball head tractor; 10-a first electronic hydraulic cylinder; 11-a second electronic hydraulic cylinder; 12-rollover monitoring unit; 13-driving the pressure control unit; 14-trailer frame; 15-a first solenoid valve; 16-a second solenoid valve; 17-a pressure sensor; 18-a drive motor; 19-disc groove support means; 101-electronic hydraulic cylinder upper supporting plate; 102-cylinder bottom support plate; 103-lifting cylinder body; 104-oil cylinder; 105-oil hole; 106-intermediate cylinder; 191-a groove support plate; 192-an annular projection; 193-import and export; 20-medium power source.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-8, the present embodiment discloses a tank truck rollover prevention traction apparatus mounted on a tank truck for performing traction function in a normal running state of a vehicle and supporting the tank truck rollover prevention traction apparatus when the vehicle rolls. The ball traction device for preventing the tank truck from rolling over comprises a ball traction device, wherein the ball traction device in the embodiment refers to a ball tractor applied to a semitrailer in patent document CN 107696806A, the structure of the ball traction device is the same as that in the cited patent document, the ball traction device mainly comprises a bottom plate 1, a fixing plate 2, a hinge 3, a handle 4, an operating rod 5, a gasket 6, an installation plate 7, a traction plate 8 and a ball tractor 9, wherein the bottom plate 1, the fixing plate 2, the hinge 3, the handle 4, the operating rod 5, the gasket 6, the installation plate 7, the traction plate 8 and the ball tractor 9 are arranged at the position of the tractor. A pair of electronic hydraulic cylinders, namely a first electronic hydraulic cylinder 10 and a second electronic hydraulic cylinder 11, are fixed at the rear end of a bottom plate 1 of the ball head traction device, and the first electronic hydraulic cylinder 10, the second electronic hydraulic cylinder 11 and a ball head tractor 9 are in a triangular state; the rollover-prevention traction device also comprises a disc type groove supporting device 19 welded on the bottom surface of the front end of the trailer, and the disc type groove supporting device 19 is horizontally arranged at the bottom of the trailer frame 14.
Specifically, there is fixed plate 2 bottom plate 1 upper end through bolted connection, there is hinge 3 fixed plate 2 upper end through bolted connection, hinge 3 upper end and the 8 welding of traction plate, 8 upper end nestings of traction plate have action bars 5, hand (hold) 4 and 5 welding of action bars, 8 surfaces of traction plate laminate with gasket 6 mutually, 8 lower extreme nestings of traction plate have mounting panel 7, mounting panel 7 and bulb tractor 9 are in same axle center, first electronic hydraulic cylinder 10, second electronic hydraulic cylinder 11 and bottom plate 1 upper surface welding, bottom plate 1, fixed plate 2 are made by the cast steel and are made its holding power and improve, gasket 6 is supported by rubber and makes its mechanical seal nature improve.
Specifically, the disc-type groove supporting device 19 is a groove supporting device with a downward opening, in this embodiment, the disc-type groove supporting device 19 is in a circular ring shape, the material is made of cast steel, the ring edge is in a groove structure, the opening of the groove faces downward, the groove is in an i-shape, two side walls inside the groove are respectively provided with a pair of annular protrusions 192, due to the existence of the annular protrusions 192, the groove is in an i-shape, free travel is left inside the disc-type groove supporting device 19, and the first free travel is the distance from the lower surface of the groove supporting plate 191 to the upper surface of the annular protrusions, namely h in fig. 51The second free stroke is the vertical distance from the lower surface of the annular projection 192 to the bottom plate 1 of the ball traction device, i.e., h in fig. 52The annular inner wall of the disc-type groove supporting device 19 is further provided with a pair of inlets and outlets 193, the opening direction of the pair of inlets and outlets 193 faces the direction of the tractor, and the pair of inlets and outlets are matched with the first electronic hydraulic cylinder 10 and the second electronic hydraulic cylinder 11 of the ball head traction device in position, and a detailed structure diagram is shown in fig. 3. The left free stroke avoids the damage of the internal structure of the electronic hydraulic cylinder caused by the angle formed by the trailer and the tractor under the conditions of normal bumpy road surface, turning and slight roll angle of the vehicle, and also avoids the influence on the normal operation condition of the vehicle.
The first electronic hydraulic cylinder 10 and the second electronic hydraulic cylinder 11 in the present embodiment are mainly divided into an electronic hydraulic cylinder upper support plate 101, an intermediate cylinder 106, a cylinder bottom support plate 102, a lift cylinder 103, an oil cylinder 104, and an oil hole 105. The thickness of the upper support plate 101 of the electronic cylinder is d2In the initial state, the height of the first electronic hydraulic cylinder 10 or the second electronic hydraulic cylinder 11, that is, the height of the intermediate cylinder 106 is d4The height of the cylinder bottom support plate 102 of the first electronic hydraulic cylinder 10 or the second electronic hydraulic cylinder 11 is d5On the electronic hydraulic cylinderA gasket can be placed on the upper part of the part supporting plate 101, so that the impact of force when the supporting is carried out can be reduced; the middle cylinder 106 is mainly used for storing the lifting cylinder 103 and providing a free stroke for the lifting cylinder 103; the main purpose of the cylinder bottom support plate 102 is to support the first electronic hydraulic cylinder 10 or the second electronic hydraulic cylinder 11, and provide sufficient force to prevent the cylinder from moving down when the side-turning support is implemented; the lifting cylinder 103 is used for rising and lowering and providing the height required by side turning support; the oil cylinder 104 is used for storing the oil quantity required by the original height of the electronic hydraulic cylinder in the normal operation state of the tank truck so as to keep a certain pressure; the oil hole 105 is connected with a control module through a circuit and is used for oil quantity entering and exiting when the cylinder body is lifted, the first electronic hydraulic cylinder 10 and the second electronic hydraulic cylinder 11 are identical in structure, and a related structural diagram, a related width and a related free stroke are shown in the attached figure 4. The whole electronic hydraulic cylinder is made of metal materials with high strength, difficult fracture and good impact buffering performance, such as chrome molybdenum alloy steel, and the electronic hydraulic cylinder is guaranteed not to be fractured under the condition that the device is supported by heavy-load side turning. The hydraulic lifting device can be lifted in time when the tank truck is about to turn over, and can be lowered and retracted after the tank truck returns to the right position.
The control module comprises a rollover monitoring unit 12, a driving pressure control unit 13 and a controller. The rollover monitoring unit 12 adopts a gyroscope sensor, is of the type LCG50-00250 and 100, has high sensitivity, and can provide vehicle implementation roll angle information to the controller in time. The rollover monitoring unit 12 is fixed to the tank truck at a position midway below the trailer frame 14 for monitoring the roll angle of the tank truck trailer. The rollover monitoring unit 12 is in signal connection with the controller and is configured to transmit a rollover signal to the controller. The driving pressure control unit 13 is connected with the first electronic hydraulic cylinder 10 and the second electronic hydraulic cylinder 11 through a line, the driving pressure control unit 13 is also connected with a controller through a line, and the controller drives the first electronic hydraulic cylinder 10 or the second electronic hydraulic cylinder 11 to lift through the driving pressure control unit 13, see fig. 6.
The driving pressure control unit 13 of the present invention comprises a medium power source 20, a first electromagnetic valve 15, a second electromagnetic valve 16, a pressure sensor 17 and a driving motor 18 for providing power; in this embodiment, the medium power source 20 is a high-pressure oil pump, an output shaft of the driving motor 18 is fixed to an input end of the medium power source 14, an output end of the medium power source 20 is connected to the first electromagnetic valve 15 and the second electromagnetic valve 16 through a pressure sensor 17, the first electromagnetic valve 15 is connected to the first electronic hydraulic cylinder 10 and the controller through a line, the second electromagnetic valve 16 is connected to the second electronic hydraulic cylinder 11 and the controller through a line, and the driving motor 18 drives the high-pressure oil pump to provide driving force for the first electronic hydraulic cylinder 10 and the second electronic hydraulic cylinder. The first electromagnetic valve 15 is connected between the medium power source 20 and the first electronic hydraulic cylinder 10, and the second electromagnetic valve 16 is connected between the medium power source 20 and the second electronic hydraulic cylinder 11; the first electromagnetic valve 15 and the second electromagnetic valve 16 are both connected to the controller through lines, the driving motor 18 is connected to the controller through lines, and the controller controls the first electromagnetic valve 15 and the second electromagnetic valve 16 to be opened and closed. The pressure sensor 17 is installed on a pipeline at the front end of the medium power source 20 connected with the first electromagnetic valve 15 and the second electromagnetic valve 16 and used for monitoring the driving pressure provided by the medium power source 20, and the pressure sensor 17 is in signal connection with the controller and feeds back a pressure signal to the controller. The model of the pressure sensor in this embodiment is a diffused silicon pressure transmitter, and the model is PT 100.
The structural principle and the assembly mode of the embodiment are as follows:
firstly, a ball head traction device, namely the structure shown in fig. 1, is welded on a tractor of a tank truck on a tractor chassis, two electronic hydraulic cylinders are opposite to a trailer behind the tractor, a disc groove supporting device 19 is welded below a trailer frame 14 with an opening facing downwards, the tractor is started to move towards the trailer until a ball head of the trailer is positioned in a ball head tractor 9, the combination of the trailer and the tractor is completed, at the moment, upper end cylinders of a first electronic hydraulic cylinder 10 and a second electronic hydraulic cylinder 11 enter the disc groove supporting device 19 from a pair of inlet and outlet 193 of the disc groove supporting device 19, and the detailed structure of the ball head tractor 9 is shown in a ball head tractor in a patent document CN 107696806 a.
As shown in fig. 8, the present embodiment also discloses a control method of a traction device based on tank truck rollover prevention based on the above device, which includes the following steps:
step 1, reserving a free stroke in a disc type groove supporting device 19 according to the bumping angle of the tank truck on a bumpy road surface, so that the normal operation of a vehicle is facilitated and the first electronic hydraulic cylinder 10 and the second electronic hydraulic cylinder 11 are prevented from being damaged;
step 2, the roll angle of the tank truck when one side wheel lifts off the ground is taken as a threshold value P, the left side wheel is regulated to lift off the ground to be a negative angle, the right side wheel is regulated to lift off the ground to be a positive angle, and the roll angle is preset in the rollover monitoring unit 12;
step 3, when the side inclination angle of the tank truck detected by the side turning monitoring unit 12 is more than or equal to P or less than or equal to-P, the side turning monitoring unit 12 transmits a side turning signal to the controller;
step 4, after the controller receives the side turning signal, if the side inclination angle is larger than or equal to P, the controller controls the first electromagnetic valve 15 to be electrified, and the medium power source 20 provides driving pressure for the first electronic hydraulic cylinder 10 to enable the first electronic hydraulic cylinder 10 to be lifted to a target amount; then the controller controls the first electromagnetic valve 15 to be powered off to realize the side turning support of the tank truck; if the pressure is less than or equal to-P, controlling the second electromagnetic valve 16 to be electrified, and the principle is the same as that of the first electromagnetic valve 15;
and 5, after the body of the tank truck returns to the right, when the side inclination angle of the tank truck 12 monitored by the side turning monitoring unit is less than P, the controller controls the first electromagnetic valve 15 to be electrified so that the first electronic hydraulic cylinder 10 returns to the normal state, then the first electromagnetic valve 15 is powered off, and if the side inclination angle of the tank truck 12 monitored by the side turning monitoring unit is greater than-P, the second electromagnetic valve 16 is controlled to be electrified, the principle is the same as that of the first electromagnetic valve 15, and the vehicle can run normally.
The free stroke in the step 1 is divided into a first free stroke and a second free stroke, and the calculation formulas are respectively as follows:
h1＝H-d1-d2-d3-d4-d5+2·L·sin θ
h2＝d4+2·L·sin θ
in the formula, h1A first free stroke from the upper surface of the annular projection 192, which is the inner wall of the groove of the disc-type groove supporting means 19, to the groove supporting plate 191; h is tractionThe vertical distance from the upper surface of a traction plate 8 of the ball head traction device to a cylinder body bottom support plate 102 in a static state after the vehicle is connected with a trailer; d1The thickness of the groove support plate 191 of the disc-type groove support device 19; d2The thickness of the upper support plate 101 of the electronic hydraulic cylinder; d3The thickness of the annular projection 192, which is the groove sidewall of the disc groove support 19; d4The height of the electronic hydraulic cylinder in the initial state is obtained; d5The thickness of the cylinder bottom support plate 102; l is the vertical distance from the front end of a traction plate 8 of the ball head traction device to a straight line where a hinge 3 of the ball head traction device is located; theta is the maximum inclination angle of the traction plate 8 of the ball head traction device and the bottom plate 1 of the ball head traction device in a bumpy state after the trailer is connected with the tractor; h is2The second free travel of the disc groove bearing 19, i.e., the vertical distance of the lower surface of the annular projection 192 of the groove sidewall of the disc groove bearing 19, from the bottom plate 1 of the ball traction device, is shown in fig. 1, 4, 5 and 6.
When the tank truck turns over on one side under different states, the required electronic hydraulic cylinders, namely the first electronic hydraulic cylinder 10 and the second sub-hydraulic cylinder 11, have different lifting amounts, and the lifting amount is too short to achieve the purpose of timely supporting, and the device can be damaged under the further side-turning impact. Therefore, for the side-turning support of the vehicle to be more stable, the lifting height of the electronic hydraulic cylinder is the maximum height which does not affect the electronic hydraulic cylinder on the other side, and meanwhile, the lifting height of the electronic hydraulic cylinder is adjusted according to the vehicle state and the sizes of all parts. Therefore, the calculation formula of the target lift amount of the first electronic hydraulic cylinder 10 or the second electronic hydraulic cylinder 11 in step 4 is:
in the formula, h3Is a first electro-hydraulic cylinder 10 orThe target lifting amount of the two electronic hydraulic cylinders 11; h is1A first free stroke of the disc groove support means 19; d is the width of the trailer body of the trailer; and delta is the side inclination angle of the tank truck monitored by the side turning monitoring unit 12.
In order to make the first electronic hydraulic cylinder 10 or the second electronic hydraulic cylinder 11 reach the target lifting amount, it is assumed that when the vehicle is stationary, the first electronic hydraulic cylinder 10 and the second electronic hydraulic cylinder 11 are in a balanced position, the static friction and the sliding friction of the lifting cylinder body of the oil cylinder and the cylinder body of the electronic hydraulic cylinder are equal, and the oil pressure is a constant value.
In the formula, m1The weight of the upper support plate 101 of the electronic hydraulic cylinder; m is2The weight of the cylinder body 103 is lifted by the electronic hydraulic cylinder.
The moving acceleration of the cylinder lifting cylinder 103 is:
in the formula, P is driving pressure of a driving device; s is the cross-sectional area of the lifting cylinder 103 of the electronic hydraulic cylinder.
By
The energization time of the first solenoid valve 15 or the second solenoid valve 16 is:
in the formula, t is the energization time of the first solenoid valve 15 or the second solenoid valve 16; h is3Is the target lifting amount of the first electronic hydraulic cylinder 10 or the second electronic hydraulic cylinder 11; m is1The weight of the upper support plate 101 of the electronic hydraulic cylinder; m is2The weight of the lifting cylinder 103 which is an electronic hydraulic cylinder; g is the acceleration of gravity; p is driving pressure of a driving device; s is an electronThe cross-sectional area of the lifting cylinder 103 of the hydraulic cylinder.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a draw gear based on tank car prevents turning on one's side, is including installing in the bulb draw gear at tractor position, its characterized in that: a first electronic hydraulic cylinder (10) and a second electronic hydraulic cylinder (11) are fixed at one end of a bottom plate (1) of the ball head traction device, the upper end of the bottom plate (1) is connected with a fixed plate (2) through a bolt, the upper end of the fixed plate (2) is connected with a hinge (3) through a bolt, and the upper end of the hinge (3) is welded with a traction plate (8); the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11) respectively comprise an electronic hydraulic cylinder upper supporting plate (101), an intermediate cylinder body (106), a cylinder body bottom supporting plate (102) and a lifting cylinder body (103), the cylinder body bottom supporting plate (102) is arranged on the outer wall of the intermediate cylinder body (106), and the electronic hydraulic cylinder upper supporting plate (101) is arranged at the upper end of the lifting cylinder body (103); the trailer is characterized by further comprising a disc type groove supporting device (19) fixed at the bottom of the trailer, wherein the opening direction of a groove of the disc type groove supporting device (19) is downward, a pair of annular protrusions (192) are respectively arranged on two side walls inside the groove of the disc type groove supporting device (19), the groove of the disc type groove supporting device (19) is in an I-shaped structure, and a groove supporting plate (191) is arranged on the upper surface of the disc type groove supporting device (19); the annular inner wall of the disc type groove supporting device (19) is further provided with a pair of inlet and outlet (193), the opening direction of the inlet and outlet (193) faces towards the ball head traction device, the opening width of the inlet and outlet (193) is matched with the cylinder diameter of the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11), and the inlet and outlet (193) is matched with the positions of the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11);
a free stroke is reserved in the disc type groove supporting device (19), the free stroke is reserved, and the calculation formula of the reserved free stroke is as follows:
h1＝H-d1-d2-d3-d4-d5+2·L·sinθ
h2＝d4+2·L·sinθ
in the formula, h1A first free travel of the upper surface of the annular projection (192) which is the groove side wall of the disc-type groove supporting device (19) to the groove supporting plate (191); h is the vertical distance from the upper surface of a traction plate (8) of the ball head traction device to the upper surface of a cylinder body bottom support plate (102) in a static state after the tractor is connected with the trailer; d1Thickness of a groove support plate (191) of a disc-type groove support device (19); d2The thickness of an upper support plate (101) of the electronic hydraulic cylinder; d3The thickness of the annular projection (192) being the groove side wall of the disc groove support means (19); d4The height of the middle cylinder body (106) in the initial state of the electronic hydraulic cylinder; d5The thickness of the cylinder bottom support plate (102); l is the vertical distance from the front end of a traction plate (8) of the ball head traction device to the straight line where a hinge (3) of the ball head traction device is located; theta is the maximum inclination angle of a traction plate (8) of the ball head traction device and a bottom plate (1) of the ball head traction device in a bumpy state after the trailer is connected with the tractor; h is2The second free stroke of the disc type groove supporting device (19) is the vertical distance between the lower surface of the annular protrusion (192) of the groove side wall of the disc type groove supporting device (19) and the bottom plate (1) of the ball head traction device.
2. The traction device for preventing the side turning of the tank truck according to claim 1, characterized in that: the control module is fixed on the tank truck, is in line connection with the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11), and is used for controlling the lifting of the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11).
3. The traction device for preventing the side turning of the tank truck according to claim 2, characterized in that: the control module comprises a rollover monitoring unit (12), a driving pressure control unit (13) and a controller, wherein the rollover monitoring unit (12) is arranged below the trailer frame (14) and is in signal connection with the controller; the driving pressure control unit (13) is fixed at the bottom of the tractor and is connected with the first electronic hydraulic cylinder (10), the second electronic hydraulic cylinder (11) and the controller through lines.
4. The traction device for preventing the side turning of the tank truck as claimed in claim 3, wherein: the driving pressure control unit (13) comprises a medium power source (20), a first electromagnetic valve (15), a second electromagnetic valve (16), a pressure sensor (17) and a driving motor (18) for providing power; the output shaft of the driving motor (18) is fixed at the input end of the medium power source (20), the output end of the medium power source (20) is connected with the first electromagnetic valve (15) and the second electromagnetic valve (16) through a pressure sensor (17), the two ends of the first electromagnetic valve (15) are connected with the first electronic hydraulic cylinder (10) and the controller through lines, and the two ends of the second electromagnetic valve (16) are connected with the second electronic hydraulic cylinder (11) and the controller through lines.
5. The anti-rollover traction device based on the tank truck as claimed in claim 4, wherein: the rollover monitoring unit (12) is a gyroscope sensor and is fixed in the middle position below the trailer frame (14).
6. The control method of the traction device based on the tank truck rollover prevention according to claim 5, is characterized by comprising the following steps:
step 1, reserving a free stroke in a disc type groove supporting device (19) according to the bumping angle of a tank truck on a bumpy road surface, so that the normal operation of a vehicle is facilitated and the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11) are prevented from being damaged;
step 2, the roll angle of the tank truck when one side wheel lifts off the ground is taken as a threshold value P, the left side wheel is regulated to lift off the ground to be a negative angle, the right side wheel is regulated to lift off the ground to be a positive angle, and the roll angle is preset in the rollover monitoring unit (12);
step 3, when the side inclination angle of the tank truck detected by the side-turning monitoring unit (12) is more than or equal to P or less than or equal to-P, the side-turning monitoring unit (12) transmits a side-turning signal to the controller;
step 4, after the controller receives the side turning signal, if the side inclination angle is larger than or equal to P, the controller controls the first electromagnetic valve (15) to be electrified, and driving pressure is provided for the first electronic hydraulic cylinder (10) through the medium power source (20), so that the first electronic hydraulic cylinder (10) is lifted to a target lifting amount; then the controller controls the first electromagnetic valve (15) to be powered off, so that the side turning support of the tank truck is realized; if the pressure is less than or equal to-P, controlling the second electromagnetic valve (16) to be electrified, wherein the principle is the same as that of the first electromagnetic valve (15);
and 5, after the body of the tank truck returns to the right, when the side inclination angle of the tank truck monitored by the side turning monitoring unit (12) is less than P, the controller controls the first electromagnetic valve (15) to be electrified, so that the first electronic hydraulic cylinder (10) returns to a normal state, then the first electromagnetic valve (15) is powered off, and if the side inclination angle of the tank truck monitored by the side turning monitoring unit (12) is greater than-P, the second electromagnetic valve (16) is controlled to be electrified, wherein the principle is the same as that of the first electromagnetic valve (15).
7. The control method according to claim 6, characterized in that, in the step 4, the target lift amount of the first electronic hydraulic cylinder (10) or the second electronic hydraulic cylinder (11) is calculated by the formula:
in the formula, h3Is the target lifting amount of the first electronic hydraulic cylinder (10) or the second electronic hydraulic cylinder (11); h is1A first free stroke of the disc-type groove supporting device (19); d is the width of the trailer body of the trailer; delta is the side inclination angle of the tank truck monitored by the side turning monitoring unit (12).
8. The control method according to claim 7, wherein in step 4, in order to achieve the target lift amount for the first electronic hydraulic cylinder (10) or the second electronic hydraulic cylinder (11), the energization time of the first solenoid valve (15) or the second solenoid valve (16) is:
wherein t is the energizing time of the first electromagnetic valve (15) or the second electromagnetic valve (16); h is3Is the target lifting amount of the first electronic hydraulic cylinder (10) or the second electronic hydraulic cylinder (11); m is1The weight of an electronic hydraulic cylinder upper support plate (101) of the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11); m is2The weight of a lifting cylinder body (103) of the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11); g is the acceleration of gravity; p is driving pressure of a driving device; s is the cross sectional area of the lifting cylinder body (103) of the first electronic hydraulic cylinder (10) and the second electronic hydraulic cylinder (11); a is the moving acceleration of the lifting cylinder (103).
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| CN202965876U (en) * | 2013-01-09 | 2013-06-05 | 邓修海 | Balance adjustment device of truck and truck |
| CN108082020A (en) * | 2016-11-22 | 2018-05-29 | 曲世友 | A kind of anti-turning-up devices of active |
| CN107696806A (en) * | 2017-09-18 | 2018-02-16 | 江苏海丰交通设备科技有限公司 | Apply the bulb tractor on semitrailer |
| CN108466528A (en) * | 2018-02-07 | 2018-08-31 | 北汽福田汽车股份有限公司 | Stabilizator rod structure, chassis and vehicle |
| CN109677317B (en) * | 2018-12-06 | 2021-08-27 | 淮安信息职业技术学院 | Side-turning supporting device of tank truck and control method thereof |
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Application publication date: 20190906 Assignee: Huai'an Jiugong motor vehicle parts testing Co.,Ltd. Assignor: HUAIYIN INSTITUTE OF TECHNOLOGY Contract record no.: X2023980047739 Denomination of invention: A traction device and control method based on anti rollover of liquid tank trucks Granted publication date: 20210618 License type: Common License Record date: 20231121 |