A hydraulic weighing system for high speed intersection heavy duty vehicles

Abstract

The application discloses a hydraulic weighing system for heavy-load vehicles at high-speed intersections, and belongs to the technical field of heavy-load transportation, which comprises a plurality of pits evenly spaced along the longitudinal direction of a road, a road panel arranged at the opening of the pit, an oil cylinder corresponding to the road panel arranged in the pit, a middle partition plate of the oil cylinder separating the inner side of the oil cylinder into an upper oil cylinder groove and a lower storage groove, a piston fixed at the bottom of the road panel and slidingly arranged in the oil cylinder groove, and an oil bag arranged between the piston and the middle partition plate; a pressure measuring instrument is installed in the storage groove, and the output end of the pressure measuring instrument is connected to the oil bag; the pressure measuring instrument can convert the current actual axle load according to the pressure change amount, and the weighing data information of each road panel is returned to a central control computer, and the computer outputs the size of each axle load and the axle spacing. The application can be used for accurately calculating the total weight of vehicles and goods, and can also consider more detailed load factors such as the axle load and the wheelbase.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heavy-load transportation, and particularly relates to a hydraulic weighing system for heavy-load vehicles at high-speed intersections. BACKGROUND

[0002] There are many types of large transport vehicles, and load, axle distance and other control indicators of the large transport vehicles will be important basis for road network operation departments and highway management departments to judge whether to allow passage. The existing weighing of the large transport vehicles is often estimated by the sum of the self-weight of the vehicle design parameters and the weight of the goods, and this method has low accuracy. Weighing of large vehicles is always a difficult problem, and it is difficult to have a super large weighing device to weigh hundreds of tons or even thousands of tons of large pieces. The traditional load calculation method can only roughly calculate the total weight of the vehicle and goods, and has low accuracy, and ignores more detailed load factors such as axle weight and axle distance. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a hydraulic weighing system for heavy-load vehicles at high-speed intersections, which can be used to accurately calculate the total weight of the vehicle and goods, and can consider more detailed load factors such as axle weight and axle distance.

[0004] To achieve the above purpose, the present application provides the following technical scheme:

[0005] The hydraulic weighing system for heavy-load vehicles at high-speed intersections comprises a plurality of pits uniformly spaced along the longitudinal direction of the road, a road panel arranged at the opening of the pit, an oil cylinder corresponding to the road panel arranged in the pit, the cross section of the oil cylinder is H-shaped, and the middle partition plate of the oil cylinder separates the inner side of the oil cylinder into an upper oil cylinder groove and a lower storage groove, the bottom of the road panel is fixed with a piston, the piston is slidingly arranged in the oil cylinder groove, and an oil bag is arranged between the piston and the middle partition plate; a pressure measuring instrument is installed in the storage groove, and the output end of the pressure measuring instrument is connected to the oil bag; the pressure measuring instrument can convert the current actual axle weight according to the pressure change amount, and the weighing data information of each road panel is returned to the central control computer, and the computer outputs the axle weight and the axle distance.

[0006] Further, a conical groove is formed between the two adjacent oil cylinders, the bottom of the conical groove is supported by a boss, the conical groove stores a non-Newtonian fluid, the bottom of the road panel is fixed with a support frame, and the support frame abuts against the upper surface of the non-Newtonian fluid.

[0007] Further, the support frame comprises an upper connecting plate, a support rod and a lower pressing plate, the upper surface of the upper connecting plate is fixed to the lower side of the road panel, the lower surface of the upper connecting plate is fixedly connected to the lower pressing plate through the support rod, the lower pressing plate is parallel to the horizontal plane, and the support frame abuts against the upper surface of the non-Newtonian fluid through the lower pressing plate.

[0008] Further, the middle part of the support rod is fixed with at least one disturbance plate, the disturbance plate is parallel to the lower pressing plate, and a plurality of through holes are formed in the disturbance plate.

[0009] Further, a limiting connecting piece is arranged between two longitudinally adjacent oil cylinders, and the limiting connecting piece penetrates the boss.

[0010] Further, the oil bag comprises a flexible film and hydraulic oil filled in the inside of the flexible film, and the oil bag is connected to the oil pressure pump through an oil pipe.

[0011] Further, a silicone gasket is arranged between the oil bag and the piston.

[0012] Further, a rubber strip is arranged between two adjacent road panels.

[0013] Further, a center hole is formed in the partition plate, a pressing rod is arranged in the center hole, the pressing rod is connected to a pressure measuring instrument, adjusting plates are arranged on both sides of the pressing rod, and the adjusting plates are connected to the pit through elastic reset devices.

[0014] The present application has the following advantages:

[0015] The present application discloses a hydraulic weighing system for heavy vehicles at high-speed intersections, the interval arrangement distance of the road panels corresponds to the standard wheelbase of the vehicle, the hydraulic weighing device under each road panel, the data transmission line and the central control computer are used, after the vehicle stops on the weighing road section, the axle load acts on the corresponding lower road panel, the road panel transmits the load to the piston, and then the oil pressure in the oil cylinder is changed, the high-precision pressure measuring instrument at the bottom can obtain the pressure change amount and convert the current actual axle load. The road panel number sequence can obtain the position of the axle load, the weighing data information of each road panel is returned to the central control computer by identifying the number of each road panel, and the computer can output the axle load and the axle distance. Thus, the accurate calculation of the total weight of the vehicle and the goods is realized, and the axle load, the axle distance and other more detailed load factors can be considered.

[0016] In the weighing system, a section of road before the toll station is divided into several road sections, the oil cylinder inner wall clamping groove can be closely attached to the road panel piston, the rising or falling of the road panel in a small range is limited, and the driving stability can be improved.

[0017] The present invention incorporates rubber blocks that simultaneously act as buffers and adapt to deformation between the pavement panels. These rubber blocks are arranged horizontally along the pavement panels, flush with the seams, and are independently stressed while maintaining overall integrity.

[0018] This invention can be used in conjunction with relevant regulations and traffic standards of highway bridge maintenance departments. For old bridges, reinforced bridges, and single-column pier bridges on various road sections, a threshold is obtained through load-bearing capacity and overturning resistance calculations. This indicator can serve as the basis for determining whether heavy-load vehicles are allowed to pass. The data obtained by this invention are precisely the core parameters of simulation calculations such as axle load and axle spacing. On the one hand, it can provide a basis for judging whether a vehicle can pass on the highway; on the other hand, it also provides a reference for the direction of bridge maintenance and reinforcement and the consideration of the most unfavorable load factors.

[0019] This invention can accommodate large transport vehicles of the maximum length, with high precision, high speed, and a high degree of road surface smoothness, without affecting normal traffic. At the same time, it has a large load-bearing capacity, is easy to maintain, and has high reliability.

[0020] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0022] Figure 1 This is a schematic diagram of the weighing unit of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view at point A;

[0024] Figure 3 A diagram illustrating vehicle weighing;

[0025] Figure 4 This is a schematic diagram of the wheelbase and axle load according to an embodiment of the present invention.

[0026] The following are labeled in the attached diagram: 1. Road panel; 2. Hydraulic cylinder; 3. Hydraulic cylinder groove; 4. Storage tank; 5. Piston; 6. Oil bladder; 7. Pressure measuring instrument; 8. Conical groove; 9. Boss; 10. Non-Newtonian fluid; 11. Upper connecting plate; 12. Support rod; 13. Lower pressure plate; 14. Disturbance plate; 15. Through hole; 16. Limiting connector; 17. Flexible membrane; 18. Oil pipe; 19. Hydraulic pump; 20. Silicone grease gasket; 21. Rubber strip; 22. Central channel; 23. Pressure rod; 24. Adjusting plate; 25. Elastic reset device. Detailed Implementation

[0027] As Figures 1 to 4 shown, the hydraulic weighing system for heavy vehicles at high-speed intersection of the application comprises a plurality of pits evenly spaced along the longitudinal direction of the road, a road panel 1 arranged at the opening of the pit, each weighing unit is arranged in a pit, the weighing unit comprises a road panel 1, the road panel 1 is made of high-strength alloy steel, the upper surface of the road panel 1 is flat, each pit is the same size, and the adjacent two pits are separated by a boss 9. Of course, in some other embodiments, the terrain can also be appropriately utilized, so that the vehicle can drive from the road to the section with the road panel 1 installed on the lower terrain without the need to dig out the pit.

[0028] In the application, an oil cylinder 2 corresponding to the road panel 1 is arranged in the pit, the outer diameter of the oil cylinder 2 is greater than the size corresponding to the pit so that the oil cylinder 2 can be just fitted therein. The cross section of the oil cylinder 2 is H-shaped, and the middle partition plate of the oil cylinder 2 divides the inner side of the oil cylinder 2 into an upper oil cylinder groove 3 and a lower storage groove 4, the opening of the oil cylinder groove 3 faces upward, and the opening of the storage groove 4 faces downward. The partition plate is integrally formed with the oil cylinder 2.

[0029] Specifically, the bottom of the road panel 1 is fixed with a piston 5, the shape of the piston 5 corresponds to the shape of the oil cylinder groove 3 of the oil cylinder 2, the piston 5 is slidingly arranged in the oil cylinder groove 3, and an oil bag 6 is arranged between the piston 5 and the middle partition plate, which can be compressed when the piston 5 moves downward. A pressure measuring instrument 7 is installed in the storage groove 4, and the output end of the pressure measuring instrument 7 is connected to the oil bag 6; the pressure measuring instrument 7 can calculate the current actual axle load according to the pressure change amount, and the weighing data information of each road panel 1 is returned to the central control computer, and the computer outputs the axle load and the axle spacing. The inner wall of the oil cylinder 2 and the force transmission piston 5 are tightly attached through a polytetrafluoroethylene pad, which can reduce the wear of the inner wall of the oil cylinder 2.

[0030] The application integrates the weighing equipment and the road infrastructure together, and gives the special section weighing function on the basis of ensuring normal traffic and road flatness. The road is divided longitudinally, and is divided according to the minimum axle spacing of heavy vehicles, which ensures the accuracy of the measurement of axle load and axle spacing.

[0031] In the embodiment, a conical groove 8 is formed between two adjacent oil cylinders 2, the bottom of the conical groove 8 is supported by a boss 9, and a non-Newtonian fluid 10 is stored in the conical groove 8, the Reynolds number of the non-Newtonian fluid 10 is greater than or equal to 2000, the bottom of the pavement slab 1 is fixed with a support frame, and the support frame is in abutment with the upper surface of the non-Newtonian fluid 10. When the vehicle passes quickly, the high-viscosity non-Newtonian fluid 10 arranged on the lower side of the pavement slab 1 plays a role, and when the vehicle leaves after weighing, the pavement becomes good in integrity and large in rigidity, and the vehicle runs smoothly. When the vehicle is parked for weighing, the non-Newtonian fluid 10 is soft, and after the force is released, the axle load of the vehicle is completely transmitted to the piston 5, and the oil pressure increases to a stable value, and at this time, the axle load information on the pavement slab 1 can be read and calculated.

[0032] The non-Newtonian fluid 10 with high viscosity is filled between the pavement slab 1 and the boss 9, the rigidity of the vehicle during driving is consistent with that of the general pavement, when the large vehicle is parked in the section for weighing, the non-Newtonian fluid 10 is released, and does not participate in the force transmission work, so that the hydraulic weighing precision is higher.

[0033] In the embodiment, the support frame includes an upper connecting plate 11, a support rod 12 and a lower pressing plate 13, the upper surface of the upper connecting plate 11 is fixed on the lower side of the pavement slab 1, the lower surface of the upper connecting plate 11 is fixedly connected to the lower pressing plate 13 through the support rod 12, the lower pressing plate 13 is parallel to the horizontal plane, and the support frame is in abutment with the upper surface of the non-Newtonian fluid 10 through the lower pressing plate 13. By arranging the support frame in this structure, when the vehicle passes quickly, the pavement slab 1 can transmit the force to the non-Newtonian fluid 10, so that the non-Newtonian fluid 10 plays a good rigidity supporting role, and the smoothness is ensured.

[0034] In the embodiment, at least one disturbance plate 14 is fixed to the middle of the support rod 12, the disturbance plate 14 is parallel to the lower pressing plate 13, and a plurality of through holes 15 are formed in the disturbance plate 14. By arranging the disturbance plate 14, when the vehicle is parked for weighing, the non-Newtonian fluid 10 is soft, the non-Newtonian fluid 10 continuously passes through the through holes 15, can play a certain damping effect, and can ensure the stability of the vehicle parked for weighing, and reduce the occurrence of vehicle shaking.

[0035] In the embodiment, a limiting connecting piece 16 is arranged between two longitudinally adjacent oil cylinders 2, and the limiting connecting piece 16 penetrates through the boss 9. The limiting connecting piece 16 is a bolt, and a plurality of bolts are used to fix the oil cylinder 2, so that the rigidity of the oil cylinder groove 3 can be improved, and the deformation between the oil cylinder groove 3 and the piston 5 caused by long-term action can be prevented.

[0036] The oil tank 6 includes a flexible film 17, hydraulic oil filled in the inside of the flexible film 17, and is connected to an oil pump 19 through an oil pipe 18. The oil pump is replenished and replaced through the oil pipe 18 and the oil pump 19, and better operation and maintenance are achieved. The central computer calculates the axle load and the axle distance by measuring the return data to determine whether to allow the passage. A silicone gasket 20 is arranged between the oil tank 6 and the piston 5. The oil tank 6 is wrapped by the outside flexible film 17 to prevent leakage, and a soft silicone gasket layer is arranged on the bottom contact surface between the oil tank 6 and the piston 5 to ensure the sealing and uniform force transmission effect.

[0037] In the embodiment, a rubber strip 21 is arranged between the two adjacent pavement panels 1. The rubber strip 21 can adapt to the slight up-and-down wobble and shear deformation between the pavement panels 1. The overall structure is effectively protected.

[0038] In the embodiment, a center hole 22 is arranged on the partition plate, a pressure rod 23 is arranged in the center hole 22, the upper end of the pressure rod 23 is connected to the oil tank 6, the lower end of the pressure rod 23 is connected to the pressure measuring instrument 7, and the adjusting plate 24 of the pressure rod 23 is connected to the pit through an elastic reset device 25. Polytetrafluoroethylene paint is coated between the outer side of the pressure rod 23 and the hole, and the friction coefficient is controlled to be less than 0.01. The outer adjusting plate 24 can be adjusted to accurately connect the valve and the pressure measuring instrument 7.

[0039] In the embodiment, the total length of the weighing section is 70.40 m (1.60 m*44), and the longest large vehicle transportation vehicle is designed (bridge transportation vehicle 65 m level). The pavement panel 1 weighing interval is 1.60 m, the general minimum wheelbase is adopted, the axle load of each axle is ensured to fall on different pavement panels 1, and more accurate axle load and axle distance can be obtained. When a plurality of medium and small large vehicles are queued and waiting to enter the highway, a plurality of vehicles can be weighed together, and the efficiency and utilization rate of the weighing section are greatly improved. The transverse width of the pavement panel 1 is 4 m, the general lane width is between 3.75 m and 4.00 m, and the wheel track of the general large vehicle on both sides is about 3 m. It can be ensured that the large vehicle enters the weighing section and each axle is stably and completely on each pavement panel for weighing. It is suggested that a deceleration strip is arranged in front of the weighing section, which is beneficial to the deceleration and parking of the large vehicle in the appropriate position section.

[0040] In use, reference is made to the attached drawings Figure 1 When the large transportation vehicle drives to the front of the toll station and is about to enter the hydraulic weighing system. First, slow down under the assistance of the deceleration strip, and then stop stably in the pavement weighing area. The driver should pay attention to control the vehicle to stop as much as possible in the middle. After confirming that each axle falls on different pavement strip weighing systems, the weighing is started. The axle load and the axle distance (1.6 m as the interval) of each axle, and the total weight of the large vehicle and the goods are obtained. The central control computer determines whether to allow the passage according to the threshold value and the information of the past weighing cases. If the passage is allowed, the vehicle starts to pass the toll station, and the weighing information is recorded.

[0041] The weighing system temperature changes with the outside, and the oil quantity is corrected. Oil is a kind of liquid with small thermal expansion coefficient, about 0.00095 / ℃, when the temperature difference changes greatly, the oil quantity in the oil cylinder 2 needs to be corrected. A thermometer is installed at the oil pump, and the measured temperature is subtracted from the initial temperature to obtain the temperature difference. When the oil cylinder 2 is reset, the volume of the measured oil is constant, and when the temperature rises, the oil quantity decreases accordingly. Similarly, when the temperature decreases, the oil quantity increases accordingly. At the same time, the readings of the oil pressure gauge and the pressure detector can also provide correction reference.

[0042] In the later operation and maintenance, the pressure detector, the reset spring and the oil pump are all replaceable, and the space reserved under the oil cylinder 2 allows the replacement and installation operation. After a long time, the oil pad may be aged and damaged, etc. The pressure rod 23 can be removed, and the oil pad can be replaced and processed. After the installation is completed, the adjusting plate 24 is adjusted to return the pressure rod 23 to the home position, and the oil pressure detector is accurately connected. When the rubber strip 21 between the road panels 1 appears protrusions and aging deformation problems, the rubber strip 21 can also be replaced by simultaneously jacking up the oil pressure on both sides, putting it in after the two sides are sewn, and then jacking it down. The overall design of the setting is assembled and replaceable, which is convenient for later maintenance and has strong durability.

[0043] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and detail without departing from the scope defined by the claims of the present application.

Claims

1. A hydraulic weighing system for heavy-duty vehicles at highway intersections, characterized in that: The system includes several pits evenly spaced along the longitudinal direction of the road, road panels installed at the openings of the pits, and hydraulic cylinders corresponding to each road panel installed within each pit. The hydraulic cylinders have an H-shaped cross-section, and a central partition divides the inner side of the cylinder into an upper cylinder groove and a lower storage groove. A piston is fixed to the bottom of each road panel and slides within the cylinder groove. An oil bladder is positioned between the piston and the central partition. A pressure measuring instrument is installed in the storage groove, and its output is connected to the oil bladder. The pressure measuring instrument calculates the actual axle load based on pressure changes. The weight data from each road panel is returned to the central control computer, which then outputs the axle load for each axle. Size and shaft spacing; a conical groove is formed between two adjacent cylinders, the bottom of which is supported by a boss, and a non-Newtonian fluid is stored in the conical groove. A support frame is fixed to the bottom of the road panel, and the support frame abuts against the upper surface of the non-Newtonian fluid. The support frame includes an upper connecting plate, a support rod, and a lower pressure plate. The upper surface of the upper connecting plate is fixed to the lower side of the road panel, and the lower surface of the upper connecting plate is fixedly connected to the lower pressure plate through the support rod. The lower pressure plate is parallel to the horizontal plane, and the support frame abuts against the upper surface of the non-Newtonian fluid through the lower pressure plate. At least one disturbance plate is fixed in the middle of the support rod. The disturbance plate is parallel to the lower pressure plate, and several through holes are opened on the disturbance plate.

2. The hydraulic weighing system for heavy-duty vehicles at highway intersections according to claim 1, characterized in that: A limiting connector is provided between two longitudinally adjacent hydraulic cylinders, and the limiting connector passes through the boss.

3. A hydraulic weighing system for heavy-duty vehicles at highway intersections according to claim 1, characterized in that: The oil bladder includes a flexible membrane and hydraulic oil filled inside the flexible membrane. The oil bladder is connected to a hydraulic pump via an oil pipe.

4. A hydraulic weighing system for heavy-duty vehicles at highway intersections according to claim 1, characterized in that: A silicone grease gasket is provided between the oil bladder and the piston.

5. A hydraulic weighing system for heavy-duty vehicles at highway intersections according to claim 1, characterized in that: Rubber strips are installed between adjacent pavement panels.

6. A hydraulic weighing system for heavy-duty vehicles at highway intersections according to any one of claims 1-5, characterized in that: The partition has a central channel, and a pressure rod is installed in the central channel. The pressure rod is connected to a pressure measuring instrument. Adjustment plates are installed on both sides of the pressure rod, and the adjustment plates are connected to the pit through an elastic reset device.

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