Gravitational potential energy collecting device for winch system of crawler crane

Abstract

The utility model discloses a gravitational potential energy collecting device for a winch system of a crawler crane, which comprises a switching valve connected with a winch motor and used for switching the flow direction of hydraulic oil; the load retainer is connected with the switching valve and is used for ensuring the stable operation of the winch motor; the electromagnetic valve is connected with the switching valve and used for controlling the energy collecting device to be started; the anti-explosion valve is connected with the electromagnetic valve and is used for ensuring the safety of the whole oil way; the conversion assembly is connected with the anti-explosion valve and used for converting the pressure of the hydraulic oil into electric energy to be stored; the filter is connected with the conversion assembly and used for filtering the hydraulic oil and enabling the hydraulic oil to flow back to the hydraulic oil tank. In the descending process after the crawler crane lifts a heavy object, gravitational potential energy is effectively utilized to convert hydraulic oil pressure into electric energy to be stored, and energy waste is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy harvesting, and particularly relates to a device for harvesting the gravitational potential energy of a winch system of a crawler crane. Background Art

[0002] The winch system of a crawler crane is driven by hydraulic oil to provide pressure to rotate the winch motor. When the winch motor is lifting or lowering, the hydraulic oil flowing through the winch motor flows back to the hydraulic oil tank. During the lowering process, the hydraulic oil gradually consumes the gravitational potential energy through a balance valve and a winch brake, converting it into heat energy. When the winch motor rotates, the hydraulic oil flows through the winch motor and then returns to the hydraulic oil tank. During this process, the gravitational potential energy generated during lifting is converted into heat energy of the hydraulic oil through the balance valve and the winch brake. During repeated operation, it not only reduces the service life of the hydraulic oil and components, but also causes energy waste. Summary of the Utility Model

[0003] To solve some or all of the technical problems existing in the above-mentioned prior art, the utility model provides a device for harvesting the gravitational potential energy of a winch system of a crawler crane, which is arranged between the winch motor and the hydraulic oil tank. The device for harvesting the gravitational potential energy of the winch system of a crawler crane includes:

[0004] A switching valve, which is connected to the winch motor and is used for switching the flow direction of the hydraulic oil;

[0005] A load retainer, which is connected to the switching valve and is used to ensure the stable operation of the winch motor;

[0006] An electromagnetic valve, which is connected to the switching valve and is used to control the opening of the energy harvesting device;

[0007] An explosion-proof valve, which is connected to the electromagnetic valve and is used to ensure the safety of the overall oil circuit;

[0008] A conversion component, which is connected to the explosion-proof valve and is used to convert the hydraulic oil pressure into electric energy for storage;

[0009] A filter, which is connected to the conversion component and is used to filter the hydraulic oil and flow it back to the hydraulic oil tank.

[0010] Further, in the above device for harvesting the gravitational potential energy of the winch system of a crawler crane, the conversion component includes:

[0011] An auxiliary motor, which is connected to the explosion-proof valve and is used to convert the hydraulic oil pressure into a rotational force;

[0012] A permanent magnet motor, which is connected to the auxiliary motor and is used to convert the rotational force into alternating current;

[0013] A rectifying device, which is connected to the permanent magnet motor and is used to convert alternating current into direct current;

[0014] A storage battery, which is connected to the rectifying device and is used to collect and store direct current.

[0015] Further, in the above-mentioned gravitational potential energy collecting device of the winch system of the crawler crane, the input end of the switching valve is connected to the output end of the winch motor through an oil circuit. The switching valve is provided with a first output end and a second output end. The first output end is connected to the input end of the load retainer through an oil circuit, and the second output end is connected to the input end of the solenoid valve through an oil circuit. The output end of the load retainer is connected to the hydraulic oil tank through an oil circuit.

[0016] Further, in the above-mentioned gravitational potential energy collecting device of the winch system of the crawler crane, the input end of the explosion-proof valve is connected to the output end of the solenoid valve through an oil circuit. The output end of the explosion-proof valve is connected to the input end of the auxiliary motor through an oil circuit. The output end of the auxiliary motor is connected to the input end of the filter through an oil circuit. The output end of the filter is connected to the hydraulic oil tank through an oil circuit.

[0017] Further, in the above-mentioned gravitational potential energy collecting device of the winch system of the crawler crane, the rotating end of the auxiliary motor is connected to the input end of the permanent magnet motor through a belt.

[0018] Further, in the above-mentioned gravitational potential energy collecting device of the winch system of the crawler crane, the output end of the permanent magnet motor is electrically connected to the input end of the rectifying device, and the output end of the rectifying device is electrically connected to the input end of the storage battery.

[0019] The gravitational potential energy collecting device of the winch system of the crawler crane of the present utility model has the following advantages and beneficial effects:

[0020] The structure of the present utility model is simple. The conversion component can effectively convert the hydraulic oil energy when the gravitational potential energy drives the winch motor to rotate into electric energy for storage, effectively avoiding energy waste. At the same time, the filter is used to filter the recycled hydraulic oil, effectively improving the service life of the hydraulic oil. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0022] Figure 1This is the hydraulic schematic diagram of the gravitational potential energy collection device for the winch system of the crawler crane of the present utility model.

[0023] Explanation of reference numerals in the drawings:

[0024] 100: Winch motor; 200: Hydraulic oil tank; 300: Hydraulic pump;

[0025] 1: Switching valve, 11: First output end, 12: Second output end;

[0026] 2: Load retainer; 3: Solenoid valve; 4: Explosion-proof valve;

[0027] 5: Conversion component, 51: Auxiliary motor, 52: Permanent magnet motor, 53: Rectifying device, 54: Storage battery;

[0028] 6: Filter. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments of the present utility model and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0030] As Figure 1 shown, the gravitational potential energy collection device for the winch system of the crawler crane of the present utility model is arranged between the winch motor 100 and the hydraulic oil tank 200.

[0031] The gravitational potential energy collection device for the winch system of the crawler crane of the present utility model includes:

[0032] A switching valve 1, which is connected to the winch motor 100 and is used to switch the flow direction of the hydraulic oil;

[0033] A load retainer 2, which is connected to the switching valve 1 and is used to ensure the stable operation of the winch motor 100;

[0034] A solenoid valve 3, which is connected to the switching valve 1 and is used to control the opening of the energy collection device;

[0035] An explosion-proof valve 4, which is connected to the solenoid valve 3 and is used to ensure the safety of the overall oil circuit;

[0036] A conversion component 5, which is connected to the explosion-proof valve 4 and is used to convert the hydraulic oil pressure into electrical energy for storage;

[0037] The filter 6 is connected to the conversion component 5 and is used to filter the hydraulic oil and return it to the hydraulic oil tank 200.

[0038] Furthermore, in the above-mentioned gravitational potential energy harvesting device for the winch system of the crawler crane, the conversion component 5 includes:

[0039] An auxiliary motor 51, which is connected to the explosion-proof valve 4 and is used to convert the hydraulic oil pressure into rotational force;

[0040] A permanent magnet motor 52, which is connected to the auxiliary motor 51 and is used to convert the rotational force into alternating current;

[0041] A rectification device 53, which is connected to the permanent magnet motor 52 and is used to convert the alternating current into direct current;

[0042] A storage battery 54, which is connected to the rectification device 53 and is used to collect and store the direct current.

[0043] Furthermore, in the above-mentioned gravitational potential energy harvesting device for the winch system of the crawler crane, the input end of the switching valve 1 is connected to the oil circuit of the output end of the winch motor 100. The switching valve 1 is provided with a first output end 11 and a second output end 12. The first output end 11 is connected to the input end of the load holder 2 through the oil circuit, and the second output end 12 is connected to the input end of the solenoid valve 3 through the oil circuit. The output end of the load holder 2 is connected to the hydraulic oil tank 200 through the oil circuit. Thus, when the winch motor is rising, the switching valve 1 switches to output from the first output end 11, effectively ensuring the smooth operation of the winch motor. When the winch motor is descending, the switching valve 1 switches to output from the second output end 12, effectively ensuring that the hydraulic oil entering the energy harvesting device can carry out energy harvesting.

[0044] Furthermore, in the above-mentioned gravitational potential energy harvesting device for the winch system of the crawler crane, the input end of the explosion-proof valve 4 is connected to the output end of the solenoid valve 3 through the oil circuit, and the output end of the explosion-proof valve 4 is connected to the input end of the auxiliary motor 51 through the oil circuit. It performs mechanical cut-off in case of leakage or failure in the auxiliary motor 51 circuit, effectively ensuring that the winch system can operate normally when encountering a failure in the energy harvesting device. The output end of the auxiliary motor 51 is connected to the input end of the filter 6 through the oil circuit, and the output end of the filter 6 is connected to the hydraulic oil tank 200 through the oil circuit. The hydraulic oil is filtered by the filter 6, which improves the service life of the hydraulic oil.

[0045] Furthermore, in the above-mentioned gravitational potential energy harvesting device for the winch system of the crawler crane, the rotating end of the auxiliary motor 51 is connected to the input end of the permanent magnet motor 52 through a belt, and the rotation of the auxiliary motor 51 driven by the hydraulic oil drives the rotation of the permanent magnet motor 52 to generate electricity.

[0046] Furthermore, in the above-mentioned gravity potential energy harvesting device for the winch system of the crawler crane, the output end of the permanent magnet motor 52 is electrically connected to the input end of the rectifying device 53, and the output end of the rectifying device 53 is electrically connected to the input end of the storage battery 54, thus effectively ensuring that the alternating current generated by the permanent magnet motor 52 is converted into direct current by the rectifying device 53 and then enters the storage battery 54 for storage.

[0047] Specifically, when the winch system hoists a heavy object upwards, the pressure oil of the hydraulic system enters from the P port of the hydraulic pump 300 to the A port of the winch motor 100, and flows out from the B port (output end) of the winch motor 100 to the switching valve 1 (input end), enters the load holding device 2 through the first output end 11, and then returns to the hydraulic oil tank 200, completing a hoisting work cycle, which is also a process of gradually generating gravitational potential energy; at this time, the pressure oil of the hydraulic system enters the solenoid valve 3 and the explosion-proof valve 4 through the second output end 12 of the switching valve 1 from the B port of the winch motor 100, flows to the auxiliary motor 51, enters from the A port (input end) and exits from the B port (output end), and the B port flows back to the hydraulic oil tank 200 after passing through the filter 6, completing a hook lowering work cycle; at the same time, the auxiliary motor 51 generates rotational force and drives the permanent magnet motor 52 through a belt to generate alternating current; the generated alternating current is rectified into direct current by the rectifying device 53 and finally stored in the storage battery 54 to complete the energy harvesting work of a work cycle; the electric energy in the storage battery 54 can be connected to the working motor as a supplementary energy source for energy supply to achieve an energy-saving effect.

[0048] In summary, compared with the prior art, the gravity potential energy harvesting device for the winch system of the crawler crane of the present invention has the following advantages and beneficial effects:

[0049] The structure of the present invention is simple. The conversion component can effectively convert the hydraulic oil energy when the gravity potential energy drives the winch motor to rotate into electric energy for storage, effectively avoiding energy waste. At the same time, the filter is used to filter the recycled hydraulic oil, effectively improving the service life of the hydraulic oil.

[0050] It should be noted that in this text, unless otherwise clearly specified and defined, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. In addition, in this text, "front", "rear", "left", "right", "upper" and "lower" are all referenced with respect to the placement state shown in the drawings.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A gravitational potential energy harvesting device for the hoisting system of a crawler crane, which is arranged between the hoisting motor and the hydraulic oil tank, and is characterized in that, The gravity potential energy collection device of the winch system of the crawler crane comprises: A switching valve, which is connected to the winch motor and is used for switching the flow direction of the hydraulic oil; A load retainer, which is connected to the switching valve and is used to ensure the stable operation of the winch motor; A solenoid valve, which is connected to the switching valve and is used to control the opening of the energy collection device; An explosion-proof valve, which is connected to the solenoid valve and is used to ensure the safety of the overall oil circuit; A conversion assembly, which is connected to the explosion-proof valve and is used to convert the hydraulic oil pressure into electric energy for storage; A filter, which is connected to the conversion assembly and is used to filter the hydraulic oil and return it to the hydraulic oil tank.

2. The gravity potential energy collecting device for the hoisting system of the crawler crane according to claim 1, wherein, The conversion assembly includes: An auxiliary motor, which is connected to the explosion-proof valve and is used to convert the hydraulic oil pressure into rotational force; A permanent magnet motor, which is connected to the auxiliary motor and is used to convert the rotational force into alternating current; A rectifying device, which is connected to the permanent magnet motor and is used to convert the alternating current into direct current; A storage battery, which is connected to the rectifying device and is used to collect and store the direct current.

3. The gravity potential energy collecting device for the hoisting system of the crawler crane according to claim 2, characterized in that, The input end of the switching valve is connected to the oil circuit of the output end of the winch motor. The switching valve is provided with a first output end and a second output end. The first output end is connected to the input end of the load retainer through the oil circuit. The second output end is connected to the input end of the solenoid valve through the oil circuit. The output end of the load retainer is connected to the hydraulic oil tank through the oil circuit.

4. The gravity potential energy collecting device for the hoisting system of the crawler crane according to claim 2, characterized in that, The input end of the explosion-proof valve is connected to the output end of the solenoid valve through the oil circuit. The output end of the explosion-proof valve is connected to the input end of the auxiliary motor through the oil circuit. The output end of the auxiliary motor is connected to the input end of the filter through the oil circuit. The output end of the filter is connected to the hydraulic oil tank through the oil circuit.

5. The gravitational potential energy collecting device for the hoisting system of the crawler crane according to claim 2, characterized in that, The rotating end of the auxiliary motor is connected to the input end of the permanent magnet motor through a belt.

6. The gravitational potential energy harvesting device for the hoisting system of the crawler crane according to claim 2, characterized in that The output end of the permanent magnet motor is electrically connected to the input end of the rectifying device. The output end of the rectifying device is electrically connected to the input end of the storage battery.

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