A split hydraulic system for a fuel transfer arm

Abstract

The present application is suitable for the field of hydraulic system, and provides a kind of bifurcation hydraulic system of oil conveying arm, including fixed arm, beam large arm and beam small arm, the fixed arm and beam large arm are hinged by first hinged shaft, beam large arm and beam small arm are hinged by second hinged shaft, the side wall of fixed arm and beam large arm is also connected with large arm hydraulic machine, the side wall of beam large arm and beam small arm is also connected with small arm hydraulic machine.The hydraulic pump of the present application applies oil pressure to annular steel pipe through oil pump pipe, aligns with interface and one of bifurcation, and the oil pressure output by annular steel pipe can be transmitted through the interface and bifurcation at this position, each bifurcation corresponds to a hydraulic valve, when the interface is rotated and aligned with the hydraulic valve at the position of large arm hydraulic pipe, the large arm hydraulic machine starts to work and lifts the beam large arm, when the interface is rotated and aligned with the hydraulic valve at the position of small arm hydraulic pipe, the small arm hydraulic machine starts to work and lifts the beam small arm.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic systems, and specifically relates to a bifurcation hydraulic system for an oil delivery arm. Background Technology

[0002] With the development of industrial technology, modern hydraulic system technology has become increasingly sophisticated. In existing technology, the oil loading arm, also called a marine oil loading arm or marine liquid loading / unloading arm, is a specialized piece of equipment installed on a dock for loading and unloading fluid materials between the dock and a tanker. The oil loading arm consists of an inner arm, an outer arm, and a rotary joint. The rotary joint connects the inner and outer arms to perform related movements, enabling the rotation of the outer arm. The oil loading arm uses the inner and outer arms to load and unload materials. To achieve hydraulic drive of the oil loading arm, a hydraulic system is required.

[0003] Patent CN110939620B discloses a boom lifting hydraulic system, comprising: a hydraulic cylinder connected to the boom; a balance valve connected to the rod chamber of the hydraulic cylinder and a load-independent balance valve connected to the rodless chamber, the two balance valves supplying oil to the hydraulic cylinder's oil chamber; a directional valve connected to the two balance valves; an oil pump supplying oil to the directional valve; a pressure-reducing relief valve connected to the directional valve; and an electro-proportional pressure-reducing valve connected to the pressure-reducing relief valve, which is connected to the load-independent balance valve. When the boom descends, the directional valve reverses, and the pressurized oil supplied by the oil pump enters the rod chamber of the hydraulic cylinder through the balance valve. Simultaneously, the pressurized oil passes through the pressure-reducing relief valve and the electro-proportional pressure-reducing valve for pressure reduction. The pressure-reduced hydraulic oil then enters the load-independent balance valve to control the opening of its valve core, allowing the boom to descend stably under gravity.

[0004] The device also has some drawbacks in its use. Each hydraulic line in the system requires an oil pump, and when the system malfunctions, it takes a lot of manpower to troubleshoot which oil pump is faulty, wasting maintenance time. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a bifurcated hydraulic system for an oil delivery boom. In operation, a hydraulic pump applies oil pressure to an annular steel pipe via an oil pump pipe. A servo motor drives a slotted frame to rotate one unit angle at a time, which in turn drives the oil supply valve and the annular steel pipe to rotate until the interface aligns with one of the bifurcated ports. The oil pressure output from the annular steel pipe can then be transmitted through this interface and bifurcated port. Each bifurcated port corresponds to a hydraulic valve. When the interface rotates to align with the hydraulic valve on the boom hydraulic pipe, the boom hydraulic press starts working to lift the boom. When the interface rotates to align with the hydraulic valve on the forearm hydraulic pipe, the forearm hydraulic press starts working to lift the forearm, thus solving the problems mentioned in the background art.

[0006] In order to solve the above problems, the present application provides the following technical solutions: a bifurcated hydraulic system of an oil delivery arm, comprising a fixed arm, a beam large arm and a beam small arm, the fixed arm and the beam large arm are hinged through a first hinge shaft, the beam large arm and the beam small arm are hinged through a second hinge shaft, a large arm hydraulic machine is further connected between the side walls of the fixed arm and the beam large arm, a small arm hydraulic machine is further connected between the side walls of the beam large arm and the beam small arm, and the large arm hydraulic machine and the small arm hydraulic machine are connected to a hydraulic control mechanism; the hydraulic control mechanism comprises a hydraulic box at the top of the fixed arm, the top end of the hydraulic box is provided with an annular groove, the cross section of the annular groove is semicircular, an annular steel pipe is slidably arranged in the annular groove, and the top end of the hydraulic box is provided with a pressing assembly matched with the annular steel pipe; the bottom of the annular steel pipe is provided with a docking port, eight bifurcated ports capable of being mutually docked with the docking port are arranged on the inner side wall of the annular groove, each bifurcated port is connected with a hydraulic valve, two hydraulic valves are connected with a large arm hydraulic pipe and a small arm hydraulic pipe, the large arm hydraulic pipe is connected into a hydraulic cavity of the large arm hydraulic machine, and the small arm hydraulic pipe is connected into a hydraulic chamber of the small arm hydraulic machine; the annular steel pipe is connected to an oil supply device, and the annular steel pipe is further connected to an angle control mechanism.

[0007] In use, the annular steel pipe rotates by one unit of angle each time until the docking port is aligned with one of the bifurcated ports, and the oil pressure output by the annular steel pipe can be transmitted through the docking port and the bifurcated port at this position, each bifurcated port corresponds to a hydraulic valve, when the docking port is rotated and aligned with the hydraulic valve at the position of the large arm hydraulic pipe, the large arm hydraulic machine starts to work to lift the beam large arm, when the docking port is rotated and aligned with the hydraulic valve at the position of the small arm hydraulic pipe, the small arm hydraulic machine starts to work to lift the beam small arm, and the hydraulic system in this process only needs an annular steel pipe to drive the oil pressure work.

[0008] Further, the pressing assembly comprises a pressure cover plate and a center cover plate, the inner side wall of the pressure cover plate and the outer side wall of the center cover plate are provided with a docking groove, the two docking grooves and the three circular arcs of the cross section of the annular groove are on the same center, and the two docking grooves and the annular groove are tightly attached to the outer side wall of the annular steel pipe.

[0009] In use, when the annular steel pipe is assembled, the annular steel pipe is first assembled into the annular groove, and then the pressure cover plate and the center cover plate are used to press and lock the annular steel pipe.

[0010] Further, the pressure cover plate is fixedly connected to the top surface of the hydraulic box through four pressure bolts, and the center cover plate is fixed to the top surface of the hydraulic box through five countersunk head bolts.

[0011] In use, the pressure cover plate is locked by four pressure bolts, the center cover plate is locked by five countersunk head bolts, thereby the installation strength of the annular steel pipe can be increased, and the clearance oil of the annular steel pipe and the annular groove is prevented.

[0012] Further, the oil supply device comprises a hydraulic pump fixedly arranged on the fixed arm side wall, an oil pump pipe is arranged at the output end of the hydraulic pump, the input end of the hydraulic pump is connected to a hydraulic oil tank, the top end side wall of the annular steel pipe is provided with an oil supply valve, and the end of the oil pump pipe is connected to the oil supply valve.

[0013] In use, the oil pump pipe draws hydraulic oil in the hydraulic oil tank and delivers the hydraulic oil into the annular steel pipe, each time when the device fails, the staff does not need to check which hydraulic pump is problematic, and the use of one oil pump of the device reduces the number of oil pressure pipelines, compared with the prior art hoisting device, each hydraulic rod of the prior art hoisting device needs to be provided with a hydraulic pump, and if the device fails, the machine needs to be stopped to check which hydraulic pump is problematic, the failure rate of the oil pressure pipeline of the device is relatively low, and the number of hydraulic pumps is only one, thereby the maintenance efficiency when failing can be improved.

[0014] Further, the angle control mechanism comprises a fixedly arranged servo motor, a notch frame is arranged at the output end of the servo motor, the oil supply valve is inserted into the notch frame, the middle of the hydraulic box is provided with a motor loading port, the servo motor is loaded in the motor loading port, the middle of the center cover plate is provided with a motor avoiding port, and the servo motor passes through the middle of the motor avoiding port.

[0015] In use, the servo motor drives the notch frame to rotate by one unit of angle each time, the notch frame drives the oil supply valve and the annular steel pipe to rotate, and the butt joint and one of the bifurcated openings are aligned.

[0016] Further, the diameter of the oil supply valve is smaller than the gap width between the pressure cover plate and the center cover plate.

[0017] In use, the annular gap between the pressure cover plate and the center cover plate is used to provide a torsion space for the oil supply valve.

[0018] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0019] One, when the device is in use, the hydraulic pump applies oil pressure to the annular steel pipe through the oil pump pipe, at this time the servo motor drives the notch frame to rotate one unit of angle each time, the notch frame drives the oil supply valve and the annular steel pipe to rotate, until the docking port and one of the bifurcated ports are aligned, the oil pressure output by the annular steel pipe can be transmitted through the docking port and the bifurcated port at this position, each bifurcated port corresponds to a hydraulic valve, when the docking port is aligned with the hydraulic valve at the position of the large arm hydraulic pipe, the large arm hydraulic machine starts to work to lift the cantilever arm, when the docking port is aligned with the hydraulic valve at the position of the small arm hydraulic pipe, the small arm hydraulic machine starts to work to lift the cantilever arm, the hydraulic system of this process only needs one hydraulic pump to drive the oil pressure work, when the device fails, the staff does not need to check which hydraulic pump has a problem, and the use of one oil pump also reduces the number of oil pressure pipes.

[0020] Secondly, the remaining six groups of bifurcated ports and corresponding hydraulic valves are not used, if the crane is installed with other devices that need to be driven by hydraulic pressure, a hydraulic valve is enabled and a hydraulic oil pipe is connected to output hydraulic pressure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view of the present application.

[0022] Figure 2 It is a side view of the present application.

[0023] Figure 3 It is a bottom view of the present application.

[0024] Figure 4 It is a schematic view of the fixed arm of the present application.

[0025] Figure 5 It is a schematic view of the hydraulic box of the present application.

[0026] Figure 6 It is a schematic view of the hydraulic box of the present application.

[0027] Figure 7 It is a schematic view of the servo motor of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] Fixed arm 1, cantilever arm 2, first hinge shaft 201, second hinge shaft 202, cantilever arm 3, hydraulic box 4, hydraulic valve 401, annular groove 402, bifurcated port 403, motor filling port 404, hydraulic pump 5, oil pump pipe 501, large arm hydraulic machine 6, large arm hydraulic pipe 601, small arm hydraulic machine 7, small arm hydraulic pipe 701, servo motor 8, notch frame 801, oil supply valve 802, annular steel pipe 803, docking port 804, pressure cover plate 9, pressure bolt 901, center cover plate 902, motor avoiding port 903, docking groove 904. DETAILED DESCRIPTION

[0030] 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; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The present application is well suited to carry out the objects and advantages thereof and will be understood by practitioners of the art. The following DETAILED DESCRIPTION is presented primarily for purposes of enabling a person skilled in the art to make and use the application. The description taken with the figures is not intended to limit the scope of the application, as claimed.

[0031] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments.

[0032] The application provides a kind of oil delivery arm bifurcation hydraulic system, as shown in Figures 1-7 It includes fixed arm 1, beam large arm 2 and beam small arm 3, the fixed arm 1 and beam large arm 2 are hinged by first hinged shaft 201, beam large arm 2 and beam small arm 3 are hinged by second hinged shaft 202, and the side wall between the fixed arm 1 and beam large arm 2 is also connected with large arm hydraulic machine 6, the side wall between the beam large arm 2 and beam small arm 3 is also connected with small arm hydraulic machine 7, and the large arm hydraulic machine 6 and small arm hydraulic machine 7 are connected to hydraulic control mechanism;The hydraulic control mechanism includes the hydraulic box 4 at the top of fixed arm 1, the top end of the hydraulic box 4 is provided with annular groove 402, the cross section of annular groove 402 is semicircular, annular steel pipe 803 is slidably arranged in annular groove 402, and the top end of hydraulic box 4 is provided with pressing assembly matched with annular steel pipe 803;The bottom of annular steel pipe 803 is provided with docking interface 804, the inner side wall of annular groove 402 is provided with eight bifurcation ports 403 that can be mutually docked with docking interface 804, each bifurcation port 403 is connected with one hydraulic valve 401, two hydraulic valves 401 are connected with large arm hydraulic pipe 601 and small arm hydraulic pipe 701, the large arm hydraulic pipe 601 is connected into the hydraulic cavity of large arm hydraulic machine 6, and the small arm hydraulic pipe 701 is connected into the hydraulic chamber of small arm hydraulic machine 7;Annular steel pipe 803 is connected to oil supply device, and annular steel pipe 803 is also connected to angle control mechanism.

[0033] In the embodiment, the annular steel pipe 803 rotates one unit of angle each time until the butt joint 804 and one of the bifurcations 403 are aligned, and the oil pressure output by the annular steel pipe 803 can be transmitted through the butt joint 804 and the bifurcation 403 at the position, each bifurcation 403 corresponds to a hydraulic valve 401, when the butt joint 804 is rotated to align the hydraulic valve at the position of the large arm hydraulic pipe 601, the large arm hydraulic machine 6 starts to work to lift the large arm 2 of the bent beam, when the butt joint 804 is rotated to align the hydraulic valve at the position of the small arm hydraulic pipe 701, the small arm hydraulic machine 7 starts to work to lift the small arm 3 of the bent beam, and the hydraulic system in the process only needs one annular steel pipe 803 to drive the oil pressure work.

[0034] In further embodiments of the present application, as shown in Figures 6-7 The inner side wall of the pressure cover plate 9 and the outer side wall of the center cover plate 902 are provided with butt joints 904, the two butt joints 904 and the three circular arcs of the cross section of the annular groove 402 are on the same center, and the two butt joints 904 and the annular groove 402 are tightly fitted on the outer side wall of the annular steel pipe 803.

[0035] In the embodiment, when the annular steel pipe 803 is assembled, the annular steel pipe 803 is first installed in the annular groove 402, and then the pressure cover plate 9 and the center cover plate 902 are pressed to lock the annular steel pipe 803.

[0036] In further embodiments of the present application, as shown in Figures 6-7 The pressure cover plate 9 is fixedly connected to the top surface of the hydraulic box 4 through four pressure bolts 901, and the center cover plate 902 is fixed to the top surface of the hydraulic box 4 through five countersunk head bolts.

[0037] In the embodiment, the pressure cover plate 9 is locked through four pressure bolts 901, and the center cover plate 902 is locked through five countersunk head bolts, so as to increase the installation strength of the annular steel pipe 803 and prevent the gap between the annular steel pipe 803 and the annular groove 402 from containing oil.

[0038] In further embodiments of the present application, as shown in Figures 1-5 The oil supply device comprises a hydraulic pump 5 fixedly arranged on the side wall of the fixed arm 1, the output end of the hydraulic pump 5 is provided with an oil pump pipe 501, the input end of the hydraulic pump 5 is connected to a hydraulic oil tank, the top end side wall of the annular steel pipe 803 is provided with an oil supply valve 802, and the end of the oil pump pipe 501 is connected to the oil supply valve 802.

[0039] In the embodiment, the oil pump pipe 501 extracts hydraulic oil in the hydraulic oil tank and delivers the hydraulic oil to the inside of the annular steel pipe 803 through the oil pump pipe 501, and each time the device fails, the staff does not need to check which hydraulic pump 5 has a problem, and the device uses an oil pump, which reduces the number of oil pressure pipelines, compared with the prior art lifting device, the prior art lifting device needs to be equipped with a hydraulic pump for each hydraulic rod, and if the device fails, it needs to be stopped to check which hydraulic pump has a problem, the failure rate of the oil pressure pipeline of the device is relatively low, and the number of hydraulic pumps is only one, thereby improving the maintenance efficiency when the device fails.

[0040] In a further embodiment of the present application, as shown in Figures 6-7 The angle control mechanism includes a fixedly arranged servo motor 8, a notch rack 801 is arranged at the output end of the servo motor 8, the oil supply valve 802 is inserted into the inside of the notch rack 801, a motor loading port 404 is arranged in the middle of the hydraulic box 4, the servo motor 8 is loaded into the inside of the motor loading port 404, a motor avoiding port 903 is arranged in the middle of the center cover plate 902, and the servo motor 8 passes through the middle of the motor avoiding port 903.

[0041] In the embodiment, the servo motor 8 drives the notch rack 801 to rotate by one unit of angle each time, the notch rack 801 drives the oil supply valve 802 and the annular steel pipe 803 to rotate, until the butt joint 804 and one of the bifurcated ports 403 are aligned.

[0042] In a further embodiment of the present application, as shown in Figures 6-7 The diameter of the oil supply valve 802 is smaller than the gap width between the pressure cover plate 9 and the center cover plate 902.

[0043] In the embodiment, the annular gap between the pressure cover plate 9 and the center cover plate 902 is used to provide a torsion space for the oil supply valve 802.

[0044] It should be noted that, for the foregoing embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the action sequence described, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0045] In several embodiments provided by the present application, it should be understood that the disclosed apparatus can be implemented in other manners. For example, the division of the apparatus embodiments described above is merely illustrative, and the division of the units can be different, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the display or discussion of the coupling or communication connection between the units can be indirect coupling or communication connection through some interfaces, or direct coupling or communication connection between the units, which can be electrical, mechanical or other forms.

[0046] The units described as separate components above can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0047] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the protection scope of the application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete or adjust the features of the embodiments of the present application according to the circumstances without conflict and without creative labor, so as to obtain different, but essentially not deviating from the concept of the present application, other technical solutions. These technical solutions also belong to the scope of the present application.

Claims

1. A diverging hydraulic system for a fuel delivery arm, characterized by: It includes fixed arm (1), beam arm (2) and beam arm (3), the fixed arm (1) and beam arm (2) are hinged through first hinged shaft (201), beam arm (2) and beam arm (3) are hinged through second hinged shaft (202), the side wall between fixed arm (1) and beam arm (2) is also connected with large arm hydraulic machine (6), the side wall between beam arm (2) and beam arm (3) is also connected with small arm hydraulic machine (7), large arm hydraulic machine (6) and small arm hydraulic machine (7) are connected to hydraulic control mechanism; The hydraulic control mechanism includes the hydraulic box (4) at the top of the fixed arm (1), the top of the hydraulic box (4) is provided with an annular groove (402), the cross section of the annular groove (402) is semicircular, the inside of the annular groove (402) is slidably provided with an annular steel pipe (803), the top of the hydraulic box (4) is provided with a pressing assembly matched with the annular steel pipe (803); The bottom of the annular steel pipe (803) is provided with a docking port (804), the inner side wall of the annular groove (402) is provided with eight bifurcated ports (403) which can be mutually docked with the docking port (804), each bifurcated port (403) is connected with a hydraulic valve (401), two hydraulic valves (401) are connected with a large arm hydraulic pipe (601) and a small arm hydraulic pipe (701), the large arm hydraulic pipe (601) is connected into the hydraulic cavity of the large arm hydraulic machine (6), the small arm hydraulic pipe (701) is connected into the hydraulic chamber of the small arm hydraulic machine (7); The annular steel pipe (803) is connected to an oil supply device, and the annular steel pipe (803) is also connected to an angle control mechanism.

2. A diverging hydraulic system for a fuel delivery arm according to claim 1, wherein: The pressing assembly includes a pressure cover plate (9) and a center cover plate (902), the inner side wall of the pressure cover plate (9) and the outer side wall of the center cover plate (902) are provided with a docking groove (904), the two docking grooves (904) and the three circular arcs of the cross section of the annular groove (402) are on the same center, and the two docking grooves (904) and the annular groove (402) are tightly attached to the outer side wall of the annular steel pipe (803).

3. A diverging hydraulic system for a fuel delivery arm according to claim 2, wherein: The pressure cover plate (9) is fixedly connected to the top surface of the hydraulic box (4) through four pressure bolts (901), and the center cover plate (902) is fixed to the top surface of the hydraulic box (4) through five countersunk head bolts.

4. A diverging hydraulic system for a fuel delivery arm according to claim 2, wherein: The oil supply device includes a hydraulic pump (5) fixedly arranged on the side wall of the fixed arm (1), the output end of the hydraulic pump (5) is provided with an oil pump pipe (501), the input end of the hydraulic pump (5) is connected to a hydraulic oil tank, the top end side wall of the annular steel pipe (803) is provided with an oil supply valve (802), and the end of the oil pump pipe (501) is connected to the oil supply valve (802).

5. A diverging hydraulic system for a fuel delivery arm according to claim 4, wherein: The angle control mechanism comprises a fixed servo motor (8), the output end of the servo motor (8) is provided with a notch frame (801), the oil supply valve (802) is inserted in the notch frame (801), the middle of the hydraulic box (4) is provided with a motor loading port (404), the servo motor (8) is loaded in the motor loading port (404), the middle of the center cover plate (902) is provided with a motor avoiding port (903), and the servo motor (8) passes through the middle of the motor avoiding port (903).

6. A diverging hydraulic system for a fuel delivery arm according to claim 5, wherein: The diameter of the oil supply valve (802) is smaller than the gap width of the pressure cover plate (9) and the center cover plate (902).

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