CN212717504U - Efficient and energy-saving hydraulic lifting system - Google Patents
Efficient and energy-saving hydraulic lifting system Download PDFInfo
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- CN212717504U CN212717504U CN202021176943.7U CN202021176943U CN212717504U CN 212717504 U CN212717504 U CN 212717504U CN 202021176943 U CN202021176943 U CN 202021176943U CN 212717504 U CN212717504 U CN 212717504U
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Abstract
The utility model relates to the hydraulic technical field, in particular to a high-efficiency and energy-saving hydraulic lifting system, which comprises an energy storage device for storing hydraulic energy; the hydraulic cylinder is driven, a piston rod is connected with a pulley block of the elevator, and the position of a piston ring is changed through oil inlet and oil return, so that the height of the elevator is changed; the first oil way is opened when the elevator ascends, and hydraulic oil in the energy storage device is injected into the driving hydraulic cylinder; the second oil way is opened when the elevator descends, and hydraulic oil with pressure in the driving hydraulic cylinder is injected into the energy storage device for recycling; and a booster pump assembly is arranged in the second oil path, and the booster pump assembly boosts hydraulic oil discharged from the driving hydraulic cylinder in the second oil path so as to form pressure difference with the hydraulic oil in the energy storage device. The utility model discloses in, the gravitational potential energy when make full use of lift descends converts it into hydraulic pressure and can store, and booster pump subassembly business turn over hydraulic fluid port pressure differential is far less than traditional hydraulic pump to a large amount of energy have been saved.
Description
Technical Field
The utility model relates to a hydraulic pressure technical field especially relates to an energy-efficient hydraulic pressure operating system.
Background
The hydraulic lifting system utilizes hydraulic energy to drive the lifting machine to ascend and descend, because the power of a loader in the existing hydraulic lifting system is generally large, when the lifting machine descends, hydraulic oil generally directly flows back to an oil tank and is not effectively recycled, a large amount of gravitational potential energy is wasted, and because the existing hydraulic lifting system basically adopts an open hydraulic system, the speed is controlled by applying a throttling technology in the ascending-descending process, a large amount of hydraulic energy is lost, the hydraulic energy is not effectively utilized, and a large amount of hydraulic energy is wasted.
In view of the above problems, the designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and is actively researched and innovated in cooperation with the application of the theory, so as to create a high-efficiency and energy-saving hydraulic lifting system, and the hydraulic lifting system is more practical.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-efficient energy-conserving hydraulic lifting system to the problem in the background art has effectively been solved.
In order to achieve the above purpose, the utility model adopts the technical scheme that: an energy efficient hydraulic hoist system comprising:
the energy storage device stores hydraulic energy;
the hydraulic cylinder is driven, a piston rod is connected with a pulley block of the elevator, and the position of a piston ring is changed through oil inlet and oil return, so that the height of the elevator is changed;
the first oil way is connected with the energy storage device and the driving hydraulic cylinder, and is opened when the elevator ascends to inject hydraulic oil in the energy storage device into the driving hydraulic cylinder;
the second oil way is connected with the energy storage device and the driving hydraulic cylinder, is opened when the elevator descends, and injects hydraulic oil with pressure in the driving hydraulic cylinder into the energy storage device for recycling;
and a booster pump assembly is arranged in the second oil path, and the booster pump assembly boosts hydraulic oil discharged from the driving hydraulic cylinder in the second oil path so as to form pressure difference with the hydraulic oil in the energy storage device.
Furthermore, the hydraulic lifting system is provided with a lifting control valve group, the lifting control valve group comprises a control system, an ascending electronic ball valve and a descending electronic ball valve, the ascending electronic ball valve is arranged on the first oil path, the descending electronic ball valve is arranged on the second oil path, and one of the ascending electronic ball valve and the descending electronic ball valve is opened.
The control system is used for detecting a signal of ascending or descending of the elevator, so as to control the ascending electronic ball valve and the descending electronic ball valve to be opened and closed.
Furthermore, an electro-hydraulic proportional flow valve group is arranged in the first oil way and used for controlling the flow speed of hydraulic oil in the first oil way.
Further, the booster pump subassembly includes servo motor and booster pump, servo motor is used for controlling the rotational speed of booster pump, and then control hydraulic oil velocity of flow in the second oil circuit.
Furthermore, the energy storage device is an energy storage device group and comprises at least two energy storage devices, hydraulic energy in the energy storage devices is gradually reduced according to the driving force required by the full load to no load of the elevator, and the lower end of each energy storage device is provided with a stop valve;
the hydraulic lifting system further comprises a detection device, and the detection device is used for detecting the load weight in the lifter and opening the proper stop valve at the lower end of the energy accumulator according to the load weight in the lifter.
Furthermore, the hydraulic lifting system further comprises an oil supplementing device, the oil supplementing device is connected with an oil tank and the energy accumulators, and the oil supplementing device is used for supplementing hydraulic oil to the energy accumulators to achieve hydraulic energy set by each energy accumulator.
The utility model has the advantages that: the hydraulic oil through among the energy storage device drives the lift and rises, and when the lift descends, the lift is owing to there is gravitational potential energy, and the hydraulic oil that drives in the pneumatic cylinder this moment has certain pressure, at this moment only needs to carry out a small amount of pressure boost to hydraulic oil through the booster pump subassembly, alright pour into energy storage device into hydraulic oil, and the gravitational potential energy when make full use of lift descends is converted it into hydraulic pressure and can be stored, and booster pump subassembly business turn over hydraulic fluid port pressure differential is far less than traditional hydraulic pump to a large amount of energy have been saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the principle of a high-efficiency energy-saving hydraulic lifting system;
FIG. 2 is a schematic diagram of the operation of the hydraulic lift system as the lift is raised;
fig. 3 is a schematic diagram of the operation of the hydraulic lift system as the lift descends.
Reference numerals: 1. an energy storage device; 11. an accumulator; 2. driving the hydraulic cylinder; 3. a first oil passage; 31. an electro-hydraulic proportional valve bank; 4. a second oil passage; 41. a booster pump assembly; 5. a lifting control valve group; 51. a rising electronic ball valve; 52. a lowering electronic ball valve; 6. oil supplementing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, an energy-efficient hydraulic lifting system includes:
the energy storage device 1 stores hydraulic energy;
the hydraulic cylinder 2 is driven, a piston rod is connected with a pulley block of the elevator, and the position of a piston ring is changed through oil inlet and oil return, so that the height of the elevator is changed;
the first oil way 3 is connected with the energy storage device 1 and the driving hydraulic cylinder 2, the first oil way 3 is opened when the elevator ascends, and hydraulic oil in the energy storage device 1 is injected into the driving hydraulic cylinder 2;
the second oil way 4 is connected with the energy storage device 1 and the driving hydraulic cylinder 2, the second oil way 4 is opened when the elevator descends, and hydraulic oil with pressure in the driving hydraulic cylinder 2 is injected into the energy storage device 1 for recycling;
a booster pump assembly 41 is provided in the second oil passage 4, and the booster pump assembly 41 boosts the hydraulic oil discharged from the drive hydraulic cylinder 2 in the second oil passage 4, thereby forming a pressure difference with the hydraulic oil in the accumulator 1.
The lift is driven to ascend through hydraulic oil in the energy storage device 1, when the lift descends, the lift can inject the hydraulic oil into the energy storage device 1 due to the fact that gravitational potential energy exists, certain pressure exists in the hydraulic oil in the hydraulic cylinder 2 at the moment, the hydraulic oil is slightly pressurized only through the booster pump assembly 41, the gravitational potential energy is fully utilized when the lift descends, the hydraulic energy is converted into hydraulic energy to be stored, the pressure difference between the oil inlet and the oil outlet of the booster pump assembly 41 is far smaller than that of a traditional hydraulic pump, and therefore a large amount of energy is saved.
Preferably, the hydraulic lifting system is provided with a lifting control valve group 5, the lifting control valve group 5 comprises a control system, a lifting electronic ball valve 51 and a descending electronic ball valve 52, the lifting electronic ball valve 51 is arranged in the first oil path 3, the descending electronic ball valve 52 is arranged in the second oil path 4, and one of the lifting electronic ball valve 51 and the descending electronic ball valve 52 is opened;
the control system is used for detecting the ascending or descending signal of the elevator, thereby controlling the ascending electronic ball valve 51 and the descending electronic ball valve 52 to be opened and closed.
When the control system detects a signal that the elevator needs to ascend, the ascending electronic ball valve 51 is opened to communicate the energy storage device 1 and the driving hydraulic cylinder 2, hydraulic oil with pressure in the energy storage device 1 is injected into an upper oil cavity in the driving hydraulic cylinder 2 to push a piston ring to move downwards, so that an elevator pulley block is pulled to drive the elevator to move upwards; when the control system detects that the elevator needs to descend, the ascending electronic ball valve 51 is closed, the descending electronic ball valve 52 is opened, the hydraulic oil in the upper oil cavity of the hydraulic cylinder 2 is driven to have certain pressure due to the gravitational potential energy of the elevator, at the moment, the hydraulic oil can be injected into the energy storage device 1 only by slightly pressurizing the hydraulic oil through the booster pump assembly 41, the gravitational potential energy is converted into hydraulic energy for storage, the device is simple while energy is saved, the reliability of the hydraulic lifting system is improved, the lower oil cavity of the hydraulic cylinder 2 can be directly communicated with the atmosphere or the atmosphere oil tank, only the pressure in the lower oil cavity needs to be kept constant, and reverse acting force cannot be generated when the piston ring moves downwards.
As the optimization of the above embodiment, an electro-hydraulic proportional flow valve group is arranged in the first oil path 3, the electro-hydraulic proportional valve group 31 is used for controlling the flow rate of hydraulic oil in the first oil path 3, since the driving hydraulic cylinder 2 is driven by the hydraulic oil in the energy storage device 1, the flow rate of the hydraulic oil directly affects the movement speed of a piston ring in the driving hydraulic cylinder 2, and further affects the speed of the elevator when the elevator ascends, and by arranging the electro-hydraulic proportional valve group 31, the flow rate of the hydraulic oil is controlled, so that the running stability of the elevator is improved, the elevator can ascend at a constant speed, and the practicability of the hydraulic elevator system is improved.
As a preferred example of the above embodiment, the booster pump assembly 41 includes a servo motor and a booster pump, the servo motor is used for controlling the rotation speed of the booster pump, and further controlling the flow rate of the hydraulic oil in the second oil path 4, and by controlling the flow rate of the hydraulic oil in the second oil path 4, the descending speed of the elevator is further controlled, the running stability of the elevator is improved, the elevator can descend at a constant speed, and the practicability of the hydraulic elevator system is improved.
Preferably, the energy storage device 1 is an energy storage group, and comprises at least two energy storage devices 11, the hydraulic energy in the energy storage devices 11 decreases progressively according to the driving force required by the elevator when the elevator is fully loaded to be unloaded, and a stop valve is arranged at the lower end of each energy storage device 11.
The hydraulic lifting system further comprises a detection device for detecting the weight of the load in the lift and opening a suitable stop valve at the lower end of the accumulator 11 in dependence on the weight of the load in the lift.
Through the arrangement of the energy accumulators 11, the problem that a single energy accumulator 11 cannot meet a lifting system with a large load range is solved, and energy is saved more than the situation that a single energy accumulator 11 is arranged. The hydraulic energy in the energy accumulator 11 is decreased progressively according to the driving force required by the full load to the no load of the elevator, when the detection device detects that the load in the elevator is G1, the weight G of the elevator car is added, the hydraulic energy required by driving the elevator at the moment can be obtained, and then the energy accumulator 11 is selected, the hydraulic energy in the selected energy accumulator 11 needs to be larger than the hydraulic energy for driving the elevator, otherwise, the elevator cannot be driven, meanwhile, the hydraulic energy in the energy accumulator group is closest to the hydraulic energy required by driving the load, and otherwise, the energy waste can be caused. The more the energy accumulators 11 are arranged, the more energy is saved in the use process of the whole hydraulic lifting system, but the comprehensive consideration of the equipment cost is also needed, and the number of the energy accumulators 11 is reasonably arranged; the greater the elevator load, the more energy efficient the hydraulic hoist system. In the present embodiment, 4 accumulators 11 are used as an example, and the energy saving ratio of the hydraulic lifting system compared with the conventional hydraulic system is calculated:
Preferably, the hydraulic lifting system further includes an oil supplementing device 6, the oil supplementing device 6 is connected to the oil tank and the energy accumulators 11, and the oil supplementing device 6 is used for supplementing hydraulic oil to the energy accumulators 11 to achieve hydraulic energy set by each energy accumulator 11. Because there is energy loss, hydraulic oil is at the in-process of used cyclically in the energy storage ware 11, hydraulic pressure can slowly reduce, after using a period, need supply hydraulic pressure energy to energy storage equipment 1, can use oil supplementing device 6 to supply hydraulic oil to energy storage ware 11 when the power consumption trough, reach the hydraulic pressure energy of each energy storage ware 11 settlement, when making hydraulic lifting system circulated use, because mend oil at the power consumption trough, hydraulic lifting system's running cost has been reduced, economy and environmental protection, hydraulic lifting system's practicality has been increased.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An energy-efficient hydraulic lifting system, characterized by includes:
an energy storage device (1) that stores hydraulic energy;
the hydraulic cylinder (2) is driven, a piston rod is connected with a pulley block of the elevator, and the position of a piston ring is changed through oil inlet and oil return, so that the height of the elevator is changed;
the first oil way (3) is connected with the energy storage device (1) and the driving hydraulic cylinder (2), the first oil way (3) is opened when the elevator ascends, and hydraulic oil in the energy storage device (1) is injected into the driving hydraulic cylinder (2);
the second oil way (4) is connected with the energy storage device (1) and the driving hydraulic cylinder (2), the second oil way (4) is opened when the elevator descends, and hydraulic oil with pressure in the driving hydraulic cylinder (2) is injected into the energy storage device (1) for recycling;
and a booster pump assembly (41) is arranged in the second oil path (4), and the booster pump assembly (41) boosts the hydraulic oil discharged from the driving hydraulic cylinder (2) in the second oil path (4) so as to form a pressure difference with the hydraulic oil in the energy storage device (1).
2. The energy-efficient hydraulic lifting system according to claim 1, characterized in that the hydraulic lifting system is provided with a lifting control valve group (5), the lifting control valve group (5) comprises a control system, a lifting electronic ball valve (51) and a descending electronic ball valve (52), the lifting electronic ball valve (51) is arranged in the first oil path (3), the descending electronic ball valve (52) is arranged in the second oil path (4), and the lifting electronic ball valve (51) and the descending electronic ball valve (52) are alternatively opened;
the control system is used for detecting a signal of ascending or descending of the elevator, so as to control the ascending electronic ball valve (51) and the descending electronic ball valve (52) to be opened and closed.
3. The efficient and energy-saving hydraulic lifting system according to claim 2, wherein an electro-hydraulic proportional valve group (31) is arranged in the first oil path (3), and the electro-hydraulic proportional valve group (31) is used for controlling the flow rate of hydraulic oil in the first oil path (3).
4. The efficient and energy-saving hydraulic lifting system according to claim 2, wherein the booster pump assembly (41) comprises a servo motor and a booster pump, and the servo motor is used for controlling the rotating speed of the booster pump so as to control the flow rate of hydraulic oil in the second oil path (4).
5. The energy-efficient hydraulic lifting system according to claim 1, characterized in that the energy storage device (1) is a group of energy accumulators (11) comprising at least two energy accumulators (11), the hydraulic energy in the energy accumulators (11) decreases according to the driving force required by the lifting machine from full load to no load, and the lower end of each energy accumulator (11) is provided with a stop valve;
the hydraulic lifting system further comprises a detection device, and the detection device is used for detecting the load weight in the lifter and opening the proper stop valve at the lower end of the energy accumulator (11) according to the load weight in the lifter.
6. The efficient and energy-saving hydraulic lifting system according to claim 5, further comprising an oil supplementing device (6), wherein the oil supplementing device (6) is connected with an oil tank and the energy accumulators (11), and the oil supplementing device (6) is used for supplementing hydraulic oil to the energy accumulators (11) to achieve the hydraulic energy set by each energy accumulator (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021176943.7U CN212717504U (en) | 2020-06-22 | 2020-06-22 | Efficient and energy-saving hydraulic lifting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021176943.7U CN212717504U (en) | 2020-06-22 | 2020-06-22 | Efficient and energy-saving hydraulic lifting system |
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| Publication Number | Publication Date |
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| CN212717504U true CN212717504U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021176943.7U Active CN212717504U (en) | 2020-06-22 | 2020-06-22 | Efficient and energy-saving hydraulic lifting system |
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| CN (1) | CN212717504U (en) |
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