Forked hydraulic system of oil transfer arm

Abstract

The invention is applicable to the field of hydraulic systems, and provides a bifurcated hydraulic system of an oil transfer arm, which comprises a fixed arm, a cantilever beam large arm and a cantilever beam small arm, the fixed arm is hinged with the cantilever beam large arm through a first hinge shaft, and the cantilever beam large arm is hinged with the cantilever beam small arm through a second hinge shaft. A large arm hydraulic machine is further connected between the fixed arm and the side wall of the cantilever beam large arm, and a small arm hydraulic machine is further connected between the cantilever beam large arm and the side wall of the cantilever beam small arm. According to the hydraulic pump, oil pressure is applied to the annular steel pipe through the oil pump pipe, the butt-joint opening is aligned with one branch opening, the oil pressure output by the annular steel pipe can be transmitted out through the butt-joint opening and the branch opening in the position, each branch opening corresponds to one hydraulic valve, and when the butt-joint opening rotates to be aligned with the hydraulic valve in the position of the large-arm hydraulic pipe, the oil pressure is output. When the butt joint port rotates to be aligned with the hydraulic valve at the position of the small arm hydraulic pipe, the small arm hydraulic machine starts to work to jack the cantilever beam small arm.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic systems, and in particular relates to a bifurcated hydraulic system of an oil delivery arm. Background Art

[0002] With the development of industrial technology, modern hydraulic system technology has become increasingly sophisticated. In existing technology, the oil transfer arm, also known as the marine oil transfer arm or marine liquid loading and unloading arm, is a special device installed on the dock to load and unload fluid materials between the dock and the tank ship. The oil transfer 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 operations, realizing the rotation of the outer arm. The oil transfer arm realizes the loading and unloading of materials through the inner and outer arms. In order to realize the hydraulic drive of the oil transfer arm, a hydraulic system is required. Patent CN110939620B discloses a boom lifting hydraulic system comprising: an oil cylinder connected to the boom; a balancing valve connected to the rod chamber of the oil cylinder and a load-independent balancing valve connected to the rodless chamber, the two balancing valves being used to supply oil to the oil chamber of the oil cylinder; a reversing valve connected to the two balancing valves; an oil pump for supplying oil to the reversing valve; a pressure-relief valve connected to the reversing valve; and an electro-proportional pressure-reducing valve connected to the pressure-relief valve, the electro-proportional pressure-reducing valve being connected to the load-independent balancing valve. When the boom is lowered, the reversing valve switches direction, and the pressure oil provided by the oil pump enters the rod chamber of the oil cylinder through the balancing valve. Simultaneously, the pressure oil is reduced in pressure by passing through the pressure-relief valve and the electro-proportional pressure-reducing valve. The reduced-pressure hydraulic oil then enters the load-independent balancing valve to control the opening of its valve core, allowing the boom to descend steadily under the action of gravity. This device still has defects when in use. Each hydraulic pipeline of the system needs to be equipped with an oil pump device. When the system fails, a lot of manpower is needed to find out which oil pump has a problem, which wastes maintenance time. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and to provide a forked hydraulic system for an oil transfer arm. 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 slot frame to rotate one unit angle each time, and the slot frame drives the oil supply valve and the annular steel pipe to rotate until the docking port is aligned with one of the forks. The oil pressure output by the annular steel pipe can be transmitted through the docking port and the fork at this position. Each fork corresponds to a hydraulic valve. When the docking port is rotated to align with the hydraulic valve at the position of the boom hydraulic pipe, the boom hydraulic press starts working to lift up the boom of the cantilever beam. When the docking port is rotated to align with the hydraulic valve at the position of the fork hydraulic pipe, the fork hydraulic press starts working to lift up the boom of the cantilever beam, thereby solving the problems mentioned in the background technology.

[0004] In order to solve the above problems, the present invention provides the following technical solutions: a bifurcated hydraulic system of an oil delivery arm, comprising a fixed arm, a cantilever beam arm and a cantilever beam arm, the fixed arm and the cantilever beam arm are hinged by a first hinge shaft, the cantilever beam arm and the cantilever beam arm are hinged by a second hinge shaft, a boom hydraulic press is further connected between the side walls of the fixed arm and the cantilever beam arm, a cantilever beam arm hydraulic press is further connected between the side walls of the cantilever beam arm and the cantilever beam arm, and the boom hydraulic press and the cantilever arm hydraulic press are connected to a hydraulic control mechanism; the hydraulic control mechanism comprises a hydraulic box at the top of the fixed arm, the top of the hydraulic box is provided with an annular groove, the annular groove The cross-section of the groove is semicircular, and an annular steel pipe is slidingly provided inside the annular groove, and a clamping assembly matching the annular steel pipe is provided on the top of the hydraulic box; a docking port is provided at the bottom of the annular steel pipe, and eight forked openings that can be docked with the docking port are provided on the inner side wall of the annular groove, and each fork is connected to a hydraulic valve, two of which are connected to the boom hydraulic pipe and the arm hydraulic pipe, the boom hydraulic pipe is connected to the hydraulic cavity of the boom hydraulic press, and the arm hydraulic pipe is connected to the hydraulic cavity of the arm hydraulic press; the annular steel pipe is connected to the oil supply device, and the annular steel pipe is also connected to the angle control mechanism.

[0005] When in use, the annular steel pipe rotates one unit angle each time until the docking port is aligned with one of the forks. The oil pressure output by the annular steel pipe can be transmitted through the docking port and the fork at this position. Each fork corresponds to a hydraulic valve. When the docking port is rotated to align with the hydraulic valve at the position of the boom hydraulic pipe, the boom hydraulic press starts working to lift up the boom of the cantilever beam. When the docking port is rotated to align with the hydraulic valve at the position of the forearm hydraulic pipe, the forearm hydraulic press starts working to lift up the forearm of the cantilever beam. The hydraulic system of this process only needs one annular steel pipe to drive the oil pressure.

[0006] Furthermore, the clamping assembly includes a pressure cover plate and a center cover plate, and the inner wall of the pressure cover plate and the outer wall of the center cover plate are both provided with docking grooves, the three arcs of the cross-section of the two docking grooves and the annular groove are at the same center of the circle, and the two docking grooves and the annular groove are tightly fitted on the outer wall of the annular steel pipe.

[0007] During use, when assembling the annular steel pipe, first install the annular steel pipe into the annular groove, and then press the pressure cover plate and the center cover plate against the annular steel pipe and lock it.

[0008] Furthermore, the pressure cover plate is fixedly connected to the top surface of the hydraulic box by four pressure bolts, and the center cover plate is fixed to the top surface of the hydraulic box by five countersunk bolts.

[0009] When in use, the pressure cover is locked by four pressure bolts, and the center cover is locked by five countersunk bolts, thereby increasing the installation strength of the annular steel pipe and preventing oil from entering the gap between the annular steel pipe and the annular groove.

[0010] Furthermore, the oil supply device includes a hydraulic pump fixedly installed on the side wall of the fixed arm, an oil pump pipe is provided at the output end of the hydraulic pump, the input end of the hydraulic pump is connected to the hydraulic oil tank, an oil supply valve is provided on the top side wall of the annular steel pipe, and the end of the oil pump pipe is connected to the oil supply valve.

[0011] When in use, the oil pump pipe draws the hydraulic oil from the hydraulic oil tank and transports the hydraulic oil to the inside of the annular steel pipe through the oil pump pipe. Every time the device fails, the staff does not need to check which hydraulic pump has the problem. The use of one oil pump in this device also reduces the number of oil pressure pipelines. Compared with the lifting device of the prior art, each hydraulic rod of the previous lifting device needs to be equipped with a hydraulic pump. If the device fails, it needs to be shut down to check which hydraulic pump has the problem. The failure rate of the oil pressure pipeline of this device is relatively low, and there is only one hydraulic pump, which can improve the maintenance efficiency in the event of a failure.

[0012] Furthermore, the angle control mechanism includes a fixed servo motor, a slot frame is provided at the output end of the servo motor, the oil supply valve is inserted into the inside of the slot frame, a motor loading port is provided in the middle of the hydraulic box, the servo motor is loaded inside the motor loading port, a motor avoidance port is provided in the middle of the center cover plate, and the servo motor passes through the middle of the motor avoidance port.

[0013] When in use, the servo motor drives the notch frame to rotate one unit of angle each time, and the notch frame drives the oil supply valve and the annular steel pipe to rotate until the docking port is aligned with one of the forked ports.

[0014] Furthermore, the diameter of the oil supply valve is smaller than the width of the gap between the pressure cover plate and the center cover plate.

[0015] When in use, the annular gap between the pressure cover plate and the center cover plate is used to provide torsional space for the oil supply valve.

[0016] Compared with the prior art, the embodiments of the present application have the following beneficial effects: First, 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 slot frame to rotate one unit angle each time. The slot frame drives the oil supply valve and the annular steel pipe to rotate until the docking port is aligned with one of the forks. The oil pressure output by the annular steel pipe can be transmitted through the docking port and the fork at this position. Each fork corresponds to a hydraulic valve. When the docking port is rotated to align with the hydraulic valve at the position of the boom hydraulic pipe, the boom hydraulic press starts working to lift up the boom of the cantilever beam. When the docking port is rotated to align with the hydraulic valve at the position of the forearm hydraulic pipe, the forearm hydraulic press starts working to lift up the forearm of the cantilever beam. The hydraulic system of this process only needs one hydraulic pump to drive the oil pressure. Every time the device fails, the staff does not need to check which hydraulic pump has a problem, and the use of one oil pump in the device also reduces the number of oil pressure pipelines.

[0017] Secondly, the remaining six groups of forks and corresponding hydraulic valves are not used. If the crane is equipped with other devices that require hydraulic drive, a hydraulic valve will be activated and a hydraulic oil pipe will be connected to output hydraulic pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the side view of the present invention.

[0020] Figure 3 It is a schematic diagram of the present invention viewed from above.

[0021] Figure 4 Schematic diagram of the fixed arm of the present invention.

[0022] Figure 5 Schematic diagram of the hydraulic box of the present invention.

[0023] Figure 6 It is a schematic diagram of a cross-section of the hydraulic box of the present invention.

[0024] Figure 7 Schematic diagram of the servo motor of the present invention.

[0025] Description of reference numerals: Fixed arm 1, cantilever arm 2, first articulated axis 201, second articulated axis 202, cantilever arm 3, hydraulic box 4, hydraulic valve 401, annular groove 402, fork 403, motor loading port 404, hydraulic pump 5, oil pump pipe 501, boom hydraulic press 6, boom hydraulic pipe 601, arm hydraulic press 7, 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 avoidance port 903, docking groove 904. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0027] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] The present invention provides a bifurcated hydraulic system for an oil delivery arm, such as Figure 1-Figure 7 As shown, it includes a fixed arm 1, a cantilever beam arm 2 and a cantilever beam arm 3, the fixed arm 1 and the cantilever beam arm 2 are hinged by a first hinge shaft 201, the cantilever beam arm 2 and the cantilever beam arm 3 are hinged by a second hinge shaft 202, and a boom hydraulic press 6 is further connected between the side walls of the fixed arm 1 and the cantilever beam arm 2, and a forearm hydraulic press 7 is further connected between the side walls of the cantilever beam arm 2 and the cantilever beam arm 3, and the boom hydraulic press 6 and the forearm hydraulic press 7 are connected to a hydraulic control mechanism; the hydraulic control mechanism includes a hydraulic box 4 at the top of the fixed arm 1, and the top of the hydraulic box 4 is provided with an annular groove 402, the cross section of the annular groove 402 is semicircular, and the inner sliding of the annular groove 402 is provided with an annular shaped steel pipe 803, the top of the hydraulic box 4 is provided with a clamping assembly matching the annular steel pipe 803; the bottom of the annular steel pipe 803 is provided with a docking port 804, and the inner wall of the annular groove 402 is provided with eight forked openings 403 that can dock with the docking port 804, each fork opening 403 is connected to a hydraulic valve 401, of which two hydraulic valves 401 are connected to the boom hydraulic pipe 601 and the arm hydraulic pipe 701, the boom hydraulic pipe 601 is connected to the hydraulic chamber of the boom hydraulic machine 6, and the arm hydraulic pipe 701 is connected to the hydraulic chamber of the arm hydraulic machine 7; the annular steel pipe 803 is connected to the oil supply device, and the annular steel pipe 803 is also connected to the angle control mechanism.

[0029] In this embodiment, the annular steel pipe 803 rotates one unit angle each time until the docking port 804 is aligned with one of the forks 403, and the oil pressure output by the annular steel pipe 803 can be transmitted through the docking port 804 and the fork 403 at this position. Each fork 403 corresponds to a hydraulic valve 401. When the docking port 804 is rotated to align with the hydraulic valve at the position of the boom hydraulic pipe 601, the boom hydraulic machine 6 starts working to lift up the cantilever beam 2. When the docking port 804 is rotated to align with the hydraulic valve at the position of the forearm hydraulic pipe 701, the forearm hydraulic machine 7 starts working to lift up the cantilever beam forearm 3. The hydraulic system of this process only needs one annular steel pipe 803 to drive the oil pressure.

[0030] In a further embodiment of the present invention, Figure 6-Figure 7 As shown, the clamping assembly includes a pressure cover plate 9 and a center cover plate 902. The inner wall of the pressure cover plate 9 and the outer wall of the center cover plate 902 are both provided with docking grooves 904. The three arcs of the cross-section of the two docking grooves 904 and the annular groove 402 are at the same center of a circle, and the two docking grooves 904 and the annular groove 402 are tightly fitted on the outer wall of the annular steel pipe 803.

[0031] In this embodiment, when the annular steel pipe 803 is assembled, the annular steel pipe 803 is first inserted into the annular groove 402, and then the pressure cover plate 9 and the center cover plate 902 press the annular steel pipe 803 and lock it.

[0032] In a further embodiment of the present invention, Figure 6-Figure 7 As shown, the pressure cover plate 9 is fixedly connected to the top surface of the hydraulic box 4 by four pressure bolts 901 , and the center cover plate 902 is fixed to the top surface of the hydraulic box 4 by five countersunk bolts.

[0033] In this embodiment, the pressure cover plate 9 is locked by four pressure bolts 901 and the center cover plate 902 is locked by five countersunk bolts, thereby increasing the installation strength of the annular steel pipe 803 and preventing oil from entering the gap between the annular steel pipe 803 and the annular groove 402.

[0034] In a further embodiment of the present invention, Figure 1-Figure 5 As shown, the oil supply device includes a hydraulic pump 5 fixedly installed 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 the hydraulic oil tank, and the top 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.

[0035] In this embodiment, the oil pump pipe 501 extracts the hydraulic oil from the hydraulic oil tank and transports the hydraulic oil to the inside of the annular steel pipe 803 through the oil pump pipe 501. Every time the device fails, the staff does not need to check which hydraulic pump 5 has a problem, and the device uses one oil pump, which also reduces the number of oil pressure pipelines. Compared with the lifting device of the prior art, each hydraulic rod of the previous lifting device needs to be equipped with a hydraulic pump. If the device fails, it needs to be shut down to check which hydraulic pump has a problem. The failure rate of the oil pressure pipeline of this device is relatively low, and there is only one hydraulic pump, which can improve the maintenance efficiency in the event of a failure.

[0036] In a further embodiment of the present invention, Figure 6-Figure 7 As shown, the angle control mechanism includes a fixed servo motor 8, a notch frame 801 is provided at the output end of the servo motor 8, the oil supply valve 802 is inserted into the inside of the notch frame 801, a motor loading port 404 is provided in the middle of the hydraulic box 4, the servo motor 8 is loaded inside the motor loading port 404, a motor avoidance port 903 is provided in the middle of the center cover plate 902, and the servo motor 8 passes through the middle of the motor avoidance port 903.

[0037] In this embodiment, the servo motor 8 drives the slot frame 801 to rotate one unit angle each time, and the slot frame 801 drives the oil supply valve 802 and the annular steel pipe 803 to rotate until the docking port 804 is aligned with one of the bifurcated ports 403 .

[0038] In a further embodiment of the present invention, Figure 6-Figure 7 As shown, 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 .

[0039] In this embodiment, the annular gap between the pressure cover plate 9 and the center cover plate 902 is used to provide a torsional space for the oil supply valve 802 .

[0040] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0041] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0042] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope of protection of the present invention.

Claims

1. A bifurcated hydraulic system for an oil transfer arm, characterized by: The invention comprises a fixed arm (1), a cantilever arm (2) and a cantilever arm (3), wherein the fixed arm (1) and the cantilever arm (2) are hinged via a first hinge shaft (201), and the cantilever arm (2) and the cantilever arm (3) are hinged via a second hinge shaft (202), a boom hydraulic press (6) is further connected between the fixed arm (1) and the side wall of the cantilever arm (2), a cantilever arm hydraulic press (7) is further connected between the side wall of the cantilever arm (2) and the cantilever arm (3), and the boom hydraulic press (6) and the cantilever arm hydraulic press (7) are connected to a hydraulic control mechanism; The hydraulic control mechanism comprises a hydraulic box (4) at the top of the fixed arm (1), an annular groove (402) is provided at the top of the hydraulic box (4), the cross section of the annular groove (402) is semicircular, an annular steel pipe (803) is slidably provided inside the annular groove (402), and a pressing assembly matching the annular steel pipe (803) is provided at the top of the hydraulic box (4); The bottom of the annular steel pipe (803) is provided with a docking port (804), and the inner side wall of the annular groove (402) is provided with eight bifurcated ports (403) that can be docked with the docking port (804), each bifurcated port (403) is connected to a hydraulic valve (401), wherein two hydraulic valves (401) are connected to the boom hydraulic pipe (601) and the arm hydraulic pipe (701), the boom hydraulic pipe (601) is connected to the hydraulic chamber of the boom hydraulic machine (6), and the arm hydraulic pipe (701) is connected to the hydraulic chamber of the arm hydraulic machine (7); The annular steel pipe (803) is connected to the oil supply device, and the annular steel pipe (803) is also connected to the angle control mechanism.

2. The bifurcated hydraulic system of an oil delivery arm according to claim 1, characterized in that: The pressing assembly comprises a pressure cover plate (9) and a center cover plate (902), wherein the inner wall of the pressure cover plate (9) and the outer wall of the center cover plate (902) are both provided with docking grooves (904), the three arcs of the cross sections of the two docking grooves (904) and the annular groove (402) are located at the same center, and the two docking grooves (904) and the annular groove (402) are tightly fitted on the outer wall of the annular steel pipe (803).

3. The bifurcated hydraulic system of an oil delivery arm according to claim 2, characterized in that: The pressure cover plate (9) is fixedly connected to the top surface of the hydraulic box (4) via four pressure bolts (901), and the center cover plate (902) is fixed to the top surface of the hydraulic box (4) via five countersunk bolts.

4. The bifurcated hydraulic system of an oil delivery arm according to claim 2, characterized in that: The oil supply device comprises a hydraulic pump (5) fixedly arranged on the side wall of the fixed arm (1); an oil pump pipe (501) is provided at the output end of the hydraulic pump (5); an input end of the hydraulic pump (5) is connected to a hydraulic oil tank; an oil supply valve (802) is provided on the top side wall of the annular steel pipe (803); and an end of the oil pump pipe (501) is connected to the oil supply valve (802).

5. The bifurcated hydraulic system of the oil delivery arm according to claim 4, characterized in that: The angle control mechanism comprises a fixedly arranged servo motor (8), an output end of the servo motor (8) is provided with a notch frame (801), the oil supply valve (802) is inserted into the notch frame (801), a motor loading port (404) is provided in the middle of the hydraulic box (4), the servo motor (8) is loaded into the motor loading port (404), and a motor avoidance port (903) is provided in the middle of the center cover (902), and the servo motor (8) passes through the middle of the motor avoidance port (903).

6. The bifurcated hydraulic system of an oil delivery arm according to claim 5, characterized in that: 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).

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