Hydraulic system for rail-mounted hoisting machine and rail-mounted hoisting machine
By introducing an emergency reset power unit into the hydraulic system of the rail-mounted hoist, and using an electric motor to drive an emergency oil pump to provide pressurized oil, the problem of operation interruption caused by engine failure was solved, achieving efficient and safe emergency reset and meeting construction requirements.
Patent Information
- Application Number
- CN202423232763.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-26
AI Technical Summary
When the engine of an existing rail-mounted hoist fails, the hydraulic system cannot function properly, causing work interruption. Furthermore, the handling methods are inefficient and unsafe.
Design a hydraulic system for a rail-mounted hoist, comprising an oil supply unit, hydraulic actuators, and an emergency reset power unit. An emergency oil pump driven by an electric motor replaces the oil supply unit in the event of engine failure, providing pressurized oil to drive the hydraulic actuators to achieve emergency reset.
In the event of engine failure, an efficient and safe emergency reset can be achieved, ensuring that the hoisting machine can quickly return to working status and meet the construction requirements with time-limited constraints.
Smart Images
Figure CN223779832U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of track-mounted work equipment technology, and in particular to a hydraulic system for a track-mounted hoist and a track-mounted hoist. Background Technology
[0002] Given the current situation of construction on existing ordinary railway lines, especially in mountainous areas where road transportation is inconvenient, track installation vehicles are required for tasks such as transporting construction materials and erecting overhead contact line supports. During railway construction, hoisting machines are mainly used to lift small and medium-sized equipment and materials on existing ordinary railway lines, and can also assist in installation operations during construction.
[0003] The hydraulic system of a rail-mounted hoist is driven by an engine. The engine powers the pump, which outputs pressurized hydraulic fluid to drive the various hydraulic components. Therefore, if the engine fails during operation, the hydraulic system will malfunction, the hoist will remain stationary, materials cannot be unloaded, the working device cannot be reset, and the hydraulic outriggers cannot be retracted. This is particularly problematic during construction on existing railway lines, where time constraints necessitate emergency measures. Currently, one approach to handling engine-related work interruptions is to disconnect the hydraulic cylinders and manually operate the hoist; another is to add a hand pump to the hydraulic circuit to supply hydraulic fluid and drive the hoist to reset. However, both methods are inefficient and unsafe. Utility Model Content
[0004] The technical problem to be solved by this application is to provide a hydraulic system for a rail-mounted hoist and a rail-mounted hoist, addressing the above-mentioned shortcomings of the prior art.
[0005] A hydraulic system for a rail-mounted hoist, the rail-mounted hoist having a traveling mechanism for movement, a boom for hoisting operations, and outrigger mechanisms for operational support; the hydraulic system includes:
[0006] The oil supply unit includes a hydraulic oil tank, an engine, and an oil pump; the engine is used to drive the oil pump to draw oil from the hydraulic oil tank to form pressurized oil and output it to the oil supply circuit.
[0007] The hydraulic actuator assembly includes a first group of hydraulic actuators, a second group of hydraulic actuators, and a third group of hydraulic actuators; the first group of hydraulic actuators includes one or more hydraulic actuators for driving the traveling mechanism to move; the second group of hydraulic actuators includes one or more hydraulic actuators for driving the boom to move; the third group of hydraulic actuators includes one or more hydraulic actuators for driving the outriggers to move; the oil supply circuit is used to supply oil to drive the first group of hydraulic actuators, the second group of hydraulic actuators, and the third group of hydraulic actuators;
[0008] The emergency reset power unit includes a motor and an emergency oil pump; the emergency oil pump is connected to the oil supply circuit; when the engine is not working, the motor can drive the emergency oil pump to draw oil from the hydraulic oil tank to form pressurized oil and output it to the oil supply circuit, so as to drive one or more of the first group of hydraulic actuators, the second group of hydraulic actuators, and the third group of hydraulic actuators to achieve emergency reset.
[0009] Optionally, the oil pump includes a first oil pump and a second oil pump; the pump shaft of the first oil pump is poweredly connected to the output shaft of the engine; the pump shaft of the second oil pump is poweredly connected to the output shaft of the engine; when the engine is working, it simultaneously drives the first oil pump and the second oil pump to work;
[0010] The oil supply circuit includes a first oil supply circuit and a second oil supply circuit; when the first oil pump is working, it outputs pressurized oil to the first oil supply circuit, and when the second oil pump is working, it outputs pressurized oil to the second oil supply circuit; the first oil supply circuit is used to supply oil to drive the first set of hydraulic actuators and the second set of hydraulic actuators; the second oil supply circuit is used to supply oil to drive the third set of hydraulic actuators.
[0011] Optionally, the emergency reset power unit includes: a first emergency reset power unit and a second emergency reset power unit;
[0012] The first emergency reset power unit includes a first motor and a first emergency oil pump; the first emergency oil pump is connected to the first oil supply circuit, and the first motor is used to drive the first emergency oil pump to work;
[0013] The second emergency reset power unit includes a second motor and a second emergency oil pump; the second emergency oil pump is connected to the second oil supply circuit, and the second motor is used to drive the second emergency oil pump to work.
[0014] Optionally, the first oil supply circuit is connected to the first group of hydraulic actuators and the second group of hydraulic actuators via a first valve group; the first valve group is used to control the operation of the first group of hydraulic actuators and the second group of hydraulic actuators; the second oil supply circuit is connected to the third group of hydraulic actuators via a second valve group, and the second valve group is used to control the operation of the third group of hydraulic actuators.
[0015] Optionally, both the first valve group and the second valve group consist of multiple directional valves.
[0016] Optionally, the first set of hydraulic actuators includes a left-side travel motor and a right-side travel motor.
[0017] Optionally, the second set of hydraulic actuators includes a rotary motor, multiple hydraulic cylinders, and a winch motor; the rotary motor is used to drive the boom to rotate horizontally; the multiple hydraulic cylinders are used to drive the boom to change shape; and the winch motor is used to drive the winch at the end of the boom to work.
[0018] Optionally, the third set of hydraulic actuators includes a telescopic cylinder and a rotary cylinder.
[0019] Optionally, it further includes a control device; the control device is provided with a switching element for controlling the first emergency reset power unit and the second emergency reset power unit.
[0020] On the other hand, this application also provides a rail-mounted hoisting machine having a hydraulic system for any of the above-mentioned rail-mounted hoisting machines.
[0021] In this application, the rail-mounted hoist includes a traveling mechanism for movement, a boom for hoisting operations, and outriggers for operational support. The hydraulic system's oil supply unit supplies oil to drive the traveling mechanism, boom, and outriggers. In this application, the hydraulic system also includes an emergency reset power unit comprising a motor and an emergency oil pump; the emergency oil pump is connected to the oil supply circuit; when the engine fails, the motor drives the emergency oil pump to draw oil from the hydraulic tank to create pressurized oil, which is then output to the oil supply circuit to drive one or more of the first, second, and third sets of hydraulic actuators to achieve an emergency reset, resulting in high efficiency and safety. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the hydraulic system for the rail-mounted hoist in an embodiment of this application.
[0023] Figure 2 This is a partial structural schematic diagram of the hydraulic system for the rail-mounted hoist in an embodiment of this application.
[0024] Figure 3 This is a schematic block diagram of the hydraulic system for the rail-mounted hoist in the embodiments of this application.
[0025] Figure 4 This is a schematic diagram of the track-mounted hoisting machine in an embodiment of this application.
[0026] Reference numerals: Traveling mechanism 10, boom 20, outrigger mechanism 30, oil supply unit 40, hydraulic oil tank 41, engine 42, oil pump 43, first oil pump 431, second oil pump 432, oil supply circuit 44, first oil supply circuit 441, second oil supply circuit 442, first set of hydraulic actuators 50a, second set of hydraulic actuators 50b, third set of hydraulic actuators 50c, first emergency reset power unit 60a, second emergency reset power unit 60b, first motor 61, first emergency oil pump 62, second motor 63, second emergency oil pump 64, first valve group 70, second valve group 80. Detailed Implementation
[0027] The following are specific embodiments of this application, described in conjunction with the accompanying drawings, to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope of protection of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.
[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.
[0029] This application provides a hydraulic system applied to a rail-mounted hoist. During railway construction, the rail-mounted hoist can be used to lift small and medium-sized equipment and materials on existing railway lines, and can also assist in installation and other operations during construction. (Reference) Figure 4 The rail-mounted hoist has a traveling mechanism 10, a boom 20, and outrigger mechanisms 30. The traveling mechanism 10 enables movement, the boom 20 performs hoisting operations, and the outrigger mechanisms 30 provide operational support. During operation, the outrigger mechanisms 30 support the frame, ensuring safety.
[0030] refer to Figures 1-3The hydraulic system includes an oil supply unit 40, hydraulic actuators, and an emergency reset power unit. The oil supply unit 40 includes a hydraulic oil tank 41, an engine 42, and an oil pump 43. The engine 42 drives the oil pump 43 to draw oil from the hydraulic oil tank 41 to form pressurized oil, which is then output to the oil supply circuit 44. The hydraulic actuators include a first set of hydraulic actuators 50a, a second set of hydraulic actuators 50b, and a third set of hydraulic actuators 50c. The first set of hydraulic actuators 50a contains one or more hydraulic actuators for driving the traveling mechanism 10 to travel. The second set of hydraulic actuators 50b contains one or more hydraulic actuators for driving the boom 20 to move. The third set of hydraulic actuators 50c contains one or more hydraulic actuators for driving the outriggers to move. The oil supply circuit 44 supplies oil to the first set of hydraulic actuators 50a, the second set of hydraulic actuators 50b, and the third set of hydraulic actuators 50c.
[0031] During operation, the oil supply unit 40 is used to output pressurized hydraulic fluid. After the engine 42 starts, it drives the oil pump 43 to work. The oil pump 43 draws oil from the hydraulic oil tank 41 to form pressurized hydraulic fluid, which is then output to the oil supply circuit 44. The oil supply circuit 44 delivers the pressurized hydraulic fluid to the first set of hydraulic actuators 50a, the second set of hydraulic actuators 50b, and the third set of hydraulic actuators 50c.
[0032] The first set of hydraulic actuators 50a includes one or more hydraulic actuators, all connected to the oil supply circuit. In one specific embodiment, the first set of hydraulic actuators 50a includes a left travel motor and a right travel motor. When the pressurized oil from the oil supply circuit is delivered to the left travel motor and the right travel motor, the left travel motor and the right travel motor operate to drive the crane to travel.
[0033] The second set of hydraulic actuators 50b includes one or more hydraulic actuators, all connected to the oil supply circuit. In one specific embodiment, the second set of hydraulic actuators 50b includes a rotary motor, multiple cylinders, and a winch motor. The rotary motor is used to drive the boom to rotate horizontally. The multiple cylinders are used to drive the boom to change shape. The winch motor is used to drive the winch at the end of the boom to work. When the pressurized oil from the oil supply circuit is delivered to the rotary motor, the multiple cylinders, and the winch motor, the rotary motor can drive the boom to rotate horizontally, the multiple cylinders can drive the boom to change shape, and the winch motor can drive the winch at the end of the boom to work.
[0034] The third set of hydraulic actuators 50c includes one or more hydraulic actuators, all connected to the oil supply circuit; in one specific embodiment, the third set of hydraulic actuators 50c includes a telescopic cylinder and a rotary cylinder; when the pressurized oil from the oil supply circuit is delivered to the telescopic cylinder and the rotary cylinder, the telescopic cylinder and the rotary cylinder can drive the outrigger to move.
[0035] It should be understood that the specific configuration of the first group of hydraulic actuators 50a, the second group of hydraulic actuators 50b, and the third group of hydraulic actuators 50c can be set according to actual needs. Furthermore, the operation of hydraulic valves is also involved in the operation of the hydraulic actuators.
[0036] Furthermore, the emergency reset power unit includes a motor and an emergency oil pump; the emergency oil pump is connected to the oil supply circuit 44; when the engine 42 is not working, the motor can drive the emergency oil pump to draw oil from the hydraulic oil tank 41 to form pressurized oil, which is then output to the oil supply circuit 44 to drive one or more of the first set of hydraulic actuators 50a, the second set of hydraulic actuators 50b, and the third set of hydraulic actuators 50c to achieve emergency reset. When the engine 42 fails, the emergency reset power unit can replace the oil supply unit 40, supplying pressurized oil to the oil supply circuit 44 to achieve emergency reset.
[0037] It should be noted that if the engine of a rail-mounted hoist fails during operation, the hydraulic system will malfunction, and the hoist will remain in the working state, unable to unload materials, reset the working device, or retract the hydraulic support legs. This is particularly problematic during construction on existing railway lines where time constraints necessitate rapid resetting and withdrawal within a specified timeframe. Therefore, when the engine fails, the motor-driven emergency oil pump draws oil from the hydraulic tank to create pressurized oil, which is then output to the oil supply circuit. This replaces the oil supply unit 40 in driving one or more of the first, second, and third sets of hydraulic actuators to achieve emergency reset, ensuring high efficiency and safety.
[0038] In one embodiment of this application, the oil pumps include a first oil pump 431 and a second oil pump 432; the pump shaft of the first oil pump 431 is poweredly connected to the output shaft of the engine 42; the pump shaft of the second oil pump 432 is poweredly connected to the output shaft of the engine 42; when the engine 42 is working, it simultaneously drives the first oil pump 431 and the second oil pump 432 to work. The oil supply circuit includes a first oil supply circuit 441 and a second oil supply circuit 442; when the first oil pump 431 is working, it outputs pressurized oil to the first oil supply circuit 441, and when the second oil pump 432 is working, it outputs pressurized oil to the second oil supply circuit 442; the first oil supply circuit 441 is used to supply oil to drive the first set of hydraulic actuators 50a and the second set of hydraulic actuators 50b; the second oil supply circuit 442 is used to supply oil to drive the third set of hydraulic actuators 50c.
[0039] When the engine 42 is running, the first oil pump 431 draws oil from the hydraulic oil tank 41 to form pressurized oil, which is then output to the first oil supply circuit 441. The first oil supply circuit 441 supplies oil to drive the first set of hydraulic actuators 50a and the second set of hydraulic actuators 50b. Simultaneously, when the engine 42 is running, the second oil pump 432 draws oil from the hydraulic oil tank 41 to form pressurized oil, which is then output to the second oil supply circuit 442. The second oil supply circuit 442 supplies oil to drive the third set of hydraulic actuators 50c.
[0040] In addition, a power connection is provided between the pump shaft of the first oil pump 431 and the output shaft of the engine 42; a power connection is also provided between the pump shaft of the second oil pump 432 and the output shaft of the engine 42. In some technical solutions, the pump shaft and the engine output shaft are directly connected for power transmission. In other technical solutions, other transmission devices are provided between the pump shaft and the engine output shaft, thereby forming an indirect power connection for power transmission.
[0041] In one embodiment of this application, the emergency reset power unit includes: a first emergency reset power unit 60a and a second emergency reset power unit 60b; the first emergency reset power unit 60a includes a first motor 61 and a first emergency oil pump 62; the first emergency oil pump 62 is connected to a first oil supply circuit 441, and the first motor 61 is used to drive the first emergency oil pump 62 to work; the second emergency reset power unit 60b includes a second motor 63 and a second emergency oil pump 64; the second emergency oil pump 64 is connected to a second oil supply circuit 442, and the second motor 63 is used to drive the second emergency oil pump 64 to work.
[0042] When the engine 42 malfunctions, the first motor 61 can drive the first emergency oil pump 62 to draw oil from the hydraulic oil tank 41 to form pressurized oil and output it to the first oil supply circuit 441. This replaces the first oil pump 431 of the oil supply unit 40 to supply oil and drive the first set of hydraulic actuators and the second set of hydraulic actuators to reset their operation. In addition, the second motor 63 drives the second emergency oil pump 64 to draw oil from the hydraulic oil tank 41 to form pressurized oil and output it to the second oil supply circuit 442. This replaces the second oil pump 432 of the oil supply unit 40 to supply oil and drive the third set of hydraulic actuators 50c to reset their operation.
[0043] In one embodiment of this application, the first oil supply circuit 441 is connected to the first group of hydraulic actuators 50a and the second group of hydraulic actuators 50b via a first valve group 70; the first valve group 70 is used to control the operation of the first group of hydraulic actuators 50a and the second group of hydraulic actuators 50b; the second oil supply circuit 442 is connected to the third group of hydraulic actuators 50c via a second valve group 80, and the second valve group 80 is used to control the operation of the third group of hydraulic actuators 50c. Further, both the first valve group 70 and the second valve group 80 are composed of multiple directional valves.
[0044] In one embodiment of this application, the hydraulic system further includes a control device; the control device is equipped with a switching element for controlling the first emergency reset power unit and the second emergency reset power unit. When the engine malfunctions, the operator can control the first and second emergency reset power units via the control device to drive one or more of the first, second, and third sets of hydraulic actuators to achieve an emergency reset.
[0045] This application also provides a rail-mounted hoist, which has the aforementioned hydraulic system for rail-mounted hoists. The rail-mounted hoist includes a traveling mechanism, a boom, and outrigger mechanisms; wherein the traveling mechanism enables movement, the boom enables hoisting operations, and the outrigger mechanisms provide operational support. During operation, the outrigger mechanisms support the frame to ensure safety. If the engine malfunctions during operation, the hydraulic system cannot function properly, and the hoist will remain in the working state, preventing material unloading, resetting the working device, and retracting the hydraulic outriggers. This is particularly problematic during construction on existing railway lines, where time constraints necessitate rapid resetting and withdrawal within a specified timeframe. Therefore, when the engine malfunctions, a motor-driven emergency oil pump draws oil from the hydraulic tank to create pressurized oil, which is then output to the oil supply circuit. This replaces the oil supply unit in driving one or more of the first, second, and third sets of hydraulic actuators to achieve emergency resetting, resulting in high efficiency and safety.
[0046] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0048] The specific embodiments described herein are merely illustrative examples of the technical solutions of this application. Those skilled in the art to which this application pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the scope defined by the claims of this application.
Claims
1. A hydraulic system for a rail-mounted hoist, characterized in that, The rail-mounted hoist has a traveling mechanism for movement, a boom for hoisting operations, and outriggers for operational support; the hydraulic system includes: The oil supply unit includes a hydraulic oil tank, an engine, and an oil pump; the engine is used to drive the oil pump to draw oil from the hydraulic oil tank to form pressurized oil and output it to the oil supply circuit. The hydraulic actuator assembly includes a first group of hydraulic actuators, a second group of hydraulic actuators, and a third group of hydraulic actuators; the first group of hydraulic actuators includes one or more hydraulic actuators for driving the traveling mechanism to move; the second group of hydraulic actuators includes one or more hydraulic actuators for driving the boom to move; the third group of hydraulic actuators includes one or more hydraulic actuators for driving the outriggers to move; the oil supply circuit is used to supply oil to drive the first group of hydraulic actuators, the second group of hydraulic actuators, and the third group of hydraulic actuators; The emergency reset power unit includes a motor and an emergency oil pump; the emergency oil pump is connected to the oil supply circuit; when the engine is not working, the motor can drive the emergency oil pump to draw oil from the hydraulic oil tank to form pressurized oil and output it to the oil supply circuit, so as to drive one or more of the first group of hydraulic actuators, the second group of hydraulic actuators, and the third group of hydraulic actuators to achieve emergency reset.
2. The hydraulic system for a rail-mounted hoist according to claim 1, characterized in that, The oil pump includes a first oil pump and a second oil pump; the pump shaft of the first oil pump is poweredly connected to the output shaft of the engine; the pump shaft of the second oil pump is poweredly connected to the output shaft of the engine; when the engine is working, it simultaneously drives the first oil pump and the second oil pump to work; The oil supply circuit includes a first oil supply circuit and a second oil supply circuit; when the first oil pump is working, it outputs pressurized oil to the first oil supply circuit, and when the second oil pump is working, it outputs pressurized oil to the second oil supply circuit; the first oil supply circuit is used to supply oil to drive the first set of hydraulic actuators and the second set of hydraulic actuators; the second oil supply circuit is used to supply oil to drive the third set of hydraulic actuators.
3. The hydraulic system for a rail-mounted hoist according to claim 2, characterized in that, The emergency reset power unit includes: a first emergency reset power unit and a second emergency reset power unit; The first emergency reset power unit includes a first motor and a first emergency oil pump; the first emergency oil pump is connected to the first oil supply circuit, and the first motor is used to drive the first emergency oil pump to work; The second emergency reset power unit includes a second motor and a second emergency oil pump; the second emergency oil pump is connected to the second oil supply circuit, and the second motor is used to drive the second emergency oil pump to work.
4. The hydraulic system for a rail-mounted hoist according to claim 2, characterized in that, The first oil supply circuit is connected to the first group of hydraulic actuators and the second group of hydraulic actuators via a first valve group; the first valve group is used to control the operation of the first group of hydraulic actuators and the second group of hydraulic actuators; the second oil supply circuit is connected to the third group of hydraulic actuators via a second valve group, and the second valve group is used to control the operation of the third group of hydraulic actuators.
5. The hydraulic system for a rail-mounted hoist according to claim 4, characterized in that, Both the first valve group and the second valve group consist of multiple directional valves.
6. The hydraulic system for a rail-mounted hoist according to claim 1, characterized in that, The first set of hydraulic actuators includes a left-side travel motor and a right-side travel motor.
7. The hydraulic system for a rail-mounted hoist according to claim 1, characterized in that, The second set of hydraulic actuators includes a rotary motor, multiple hydraulic cylinders, and a winch motor; the rotary motor is used to drive the boom to rotate horizontally; the multiple hydraulic cylinders are used to drive the boom to change shape; and the winch motor is used to drive the winch at the end of the boom to work.
8. The hydraulic system for a rail-mounted hoist according to claim 1, characterized in that, The third set of hydraulic actuators includes telescopic cylinders and rotary cylinders.
9. The hydraulic system for a rail-mounted hoist according to claim 3, characterized in that, It also includes a control device; the control device is provided with a switching element for controlling the first emergency reset power unit and the second emergency reset power unit.
10. A rail-mounted hoist, characterized in that, The rail-mounted hoist has a hydraulic system for rail-mounted hoists as described in any one of claims 1-9.