CN210599620U - Hydraulic power unit and hydraulic power system - Google Patents
Hydraulic power unit and hydraulic power system Download PDFInfo
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- CN210599620U CN210599620U CN201921287097.3U CN201921287097U CN210599620U CN 210599620 U CN210599620 U CN 210599620U CN 201921287097 U CN201921287097 U CN 201921287097U CN 210599620 U CN210599620 U CN 210599620U
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Abstract
A hydraulic power unit and a hydraulic power system, the hydraulic power unit includes: an oil tank; a hydraulic pump; the shuttle valve is connected with the hydraulic pump through a first oil duct; the shuttle valve is connected with the main oil cylinder through a second oil duct, and when the shuttle valve is switched to a communication position, the first oil duct is communicated with the second oil duct; the electromagnetic valve is connected with the oil tank through a first oil way and is connected with the shuttle valve through a second oil way; the sequence valve is provided with a first working position and a second working position and is connected with the main oil cylinder through a third oil way; the sequence valve is connected with the auxiliary oil cylinder through a fourth oil way, and when the sequence valve is switched to a second working position, the third oil way is communicated with the fourth oil way; and the logic valve is provided with a through position and a blocking position, is connected with the sequence valve through a fifth oil path, is connected with the oil tank through a sixth oil path, and is communicated with the fifth oil path and the fifth oil path when the sequence valve is positioned at the first working position and the logic valve is switched to the through position. The utility model discloses help simplifying hydraulic power unit's operating procedure.
Description
Technical Field
The utility model relates to a hydraulic control technical field especially relates to a hydraulic power unit and hydraulic power system.
Background
The loading and unloading of goods are realized by the aid of the loading and unloading bridge. The dock leveler is generally installed on a warehouse platform and is lapped at the rear end of a boxcar, and follow-up adjustment can be achieved according to the height difference between the ground of the warehouse platform and the boxcar. The front end of the dock leveler is provided with a turnover lip plate which is always lapped with the boxcar when goods are loaded and unloaded. By adjusting the angle of the dock leveler, a bridge is erected between the truck and the warehouse platform ground, and various carriers can smoothly pass through the dock leveler to convey goods between the warehouse platform ground and the carriage.
With the aid of the dock leveler, only one operator needs to operate, and the goods can be quickly loaded and unloaded. The dock leveler helps to reduce labor force, improve working efficiency and increase economic benefits.
However, the structure of the hydraulic power unit of the existing dock leveler still needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem provide a hydraulic power unit and hydraulic power system, easy operation.
In order to solve the above problem, the utility model provides a hydraulic power unit, include: an oil tank; the hydraulic pump is connected with the oil tank; the shuttle valve is provided with a backflow position and a communication position and is connected with the hydraulic pump through a first oil duct; the shuttle valve is connected with the main oil cylinder through a second oil duct, and when the shuttle valve is switched to a communication position, the first oil duct is communicated with the second oil duct; the electromagnetic valve is connected with the oil tank through a first oil path and connected with the shuttle valve through a second oil path, and when the shuttle valve is switched to a backflow position, the first oil path is communicated with the second oil path; the sequence valve is provided with a first working position and a second working position and is connected with the main oil cylinder through a third oil way; the sequence valve is connected with the auxiliary oil cylinder through a fourth oil path, and when the sequence valve is switched to a second working position, the third oil path is communicated with the fourth oil path; the logic valve is provided with a through position and a blocking position, the logic valve is connected with the sequence valve through a fifth oil path, the logic valve is connected with the oil tank through a sixth oil path, when the sequence valve is located at a first working position and the logic valve is switched to the through position, the fourth oil path is communicated with the fifth oil path, and the fifth oil path is communicated with the sixth oil path.
Optionally, when the shuttle valve is switched to the return position, the logic valve is switched to the blocking position; when the shuttle valve is switched to the connected position, the logic valve is switched to the through position.
Optionally, the logic valve has a first control port, the first control port is connected to the second oil path, and the first control port is adapted to sense oil pressure in the second oil path to control the switching position of the logic valve.
Optionally, the sequence valve has a set pressure, and is located at the second operating position when the oil pressure in the third oil passage is higher than or equal to the set pressure, and is switched to the first operating position when the oil pressure in the third oil passage is lower than the set pressure.
Optionally, a first spare oil outlet is arranged on the second oil passage, and a second spare oil outlet is arranged on the third oil passage.
Optionally, the hydraulic power unit further includes: and one end of the overflow valve is connected with the hydraulic pump, and the other end of the overflow valve is connected with the oil tank.
Optionally, the hydraulic power unit further includes: and the first damping valve is arranged on the second oil path.
Optionally, the hydraulic power unit further includes: and the second damping valve is arranged on the sixth oil path.
Correspondingly, the utility model discloses still provide one kind and include hydraulic power unit's hydraulic power system, hydraulic power system still includes: the boarding bridge is arranged on the main oil cylinder.
Optionally, the hydraulic power system further includes: the lip plate is arranged on the auxiliary oil cylinder and connected with the dock leveler.
Compared with the prior art, the technical scheme of the utility model have following advantage:
the hydraulic power unit includes: the hydraulic control system comprises an oil tank, a hydraulic pump, a shuttle valve, a main oil cylinder, an electromagnetic valve, a sequence valve, an auxiliary oil cylinder and a logic valve. On one hand, the shuttle valve is provided with a return position and a communication position, when the shuttle valve is switched to the communication position, the first oil duct is communicated with the second oil duct, and oil in the oil tank is conveyed into the main oil cylinder through the hydraulic pump, the first oil duct, the shuttle valve and the second oil duct in sequence, so that the boarding bridge gradually rises; when the shuttle valve is switched to a return position, the first oil way is communicated with the second oil way, oil in the main oil cylinder sequentially flows back to the oil tank through the shuttle valve, the second oil way, the electromagnetic valve and the first oil way, and the dock leveler descends slowly; the hydraulic power unit can be used to control the lifting of the dock leveler. On the other hand, when the sequence valve is switched to a second working position, the third oil path is communicated with the fourth oil path, oil discharged by the hydraulic pump is conveyed into the auxiliary oil cylinder through the first oil path, the shuttle valve, the third oil path, the sequence valve and the fourth oil path in sequence, and the lip plate is gradually unfolded; when the sequence valve is located at a first working position and the logic valve is switched to a through position, the fourth oil way is communicated with the fifth oil way, the fifth oil way is communicated with the sixth oil way, oil in the auxiliary oil cylinder sequentially flows back to the oil tank through the fourth oil way, the sequence valve, the fifth oil way, the logic valve and the sixth oil way, and the lip plate gradually descends and retracts; the lifting of the lip can thus be controlled by means of the hydraulic power unit. In combination of the two aspects, the hydraulic power unit can control the ascending and descending of the dock leveler and the lip plate, and operation steps are simplified. Specifically, the hydraulic power unit is convenient for realizing automatic control of logic actions, and can realize automatic control through a hydraulic loop, for example, an operator can control the ascending and descending of the dock leveler and the lip plate by pressing and resetting a [ motor starting ] button on an operation panel, so that the operation is simple, and the use is convenient.
Drawings
Fig. 1 is a hydraulic schematic diagram of a hydraulic power unit according to an embodiment of the present invention.
Detailed Description
Now, analysis is performed by combining a hydraulic power unit, the connection relation of each part of the hydraulic power unit is simple, so that a plurality of buttons such as [ motor start ], [ rise ], [ fall ], and the like are arranged on an operation panel of the hydraulic power unit, wherein the [ motor start ], [ motor start ] button is used for controlling the start or the stop of a hydraulic pump; the button is used for controlling the ascending of the ramp axle and the lip plate; the [ descending ] button is used for controlling the descending of the dock leveler and the lip plate, so that the use and the operation of the hydraulic power unit are complicated and difficult.
The inventor researches the structure of the hydraulic power unit, and through creative work, the inventor notices that the hydraulic power unit can automatically act through a hydraulic circuit to control the lifting of the dock leveler and the lip plate, so that the using operation process of the hydraulic power unit can be simplified.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, a hydraulic power unit 100 includes: the hydraulic control system includes a tank 110, a hydraulic pump 120, a shuttle valve 200, a master cylinder 310, a solenoid valve 400, a sequence valve 410, a slave cylinder 320, and a logic valve 420.
In this embodiment, the hydraulic pump 120 is connected to the oil tank 110.
The hydraulic pump 120 functions as a power element of the hydraulic power unit 100. The hydraulic pump 120 includes a pump body and a motor connected to the pump body. By means of the driving of the motor, the pump body draws oil from the oil tank 110 and forms a pressure oil discharge.
In this embodiment, the hydraulic power unit 100 further includes: and one end of the overflow valve 130 is connected with the hydraulic pump 120, and the other end of the overflow valve 130 is connected with the oil tank 110.
The relief valve 130 can function as a constant pressure relief valve. When the system pressure reaches a set value, the valve core of the overflow valve 130 is opened to overflow, so that the excess oil output by the hydraulic pump 120 can overflow back to the oil tank 110, thereby ensuring that the inlet pressure of the overflow valve 130 is constant.
In this embodiment, one end of the shuttle valve 200 is connected to the hydraulic pump 120 through a first oil passage 510, and the other end of the shuttle valve 200 is connected to the main cylinder 310 through a second oil passage 520.
The shuttle valve 200 has a return position 210 and a communication position 220. When the hydraulic pump 120 is started, the shuttle valve 200 is switched to the communication position 220, the first oil passage 510 is communicated with the second oil passage 520, and the oil in the oil tank 110 is sequentially delivered to the main cylinder 310 through the hydraulic pump 120, the first oil passage 510, the shuttle valve 200 and the second oil passage 520. The ramp 810 is disposed on the main cylinder 310, and the ramp 810 gradually rises as the main cylinder 310 is filled with oil.
In this embodiment, a first spare oil outlet 910 is disposed on the second oil passage 520.
The solenoid valve 400 is connected to the oil tank 110 through a first oil passage 610, and the solenoid valve 400 is connected to the shuttle valve 200 through a second oil passage 620. When the shuttle valve 200 is switched to the return position 210, the first oil passage 610 is communicated with the second oil passage 620, and the oil in the master cylinder 310 sequentially flows back to the oil tank 110 through the shuttle valve 200, the second oil passage 620, the solenoid valve 400 and the first oil passage 610. As the oil in the master cylinder 310 flows back to the oil tank 110, the dock leveler 810 descends slowly.
The hydraulic power unit 100 further includes: and a first damping valve 710, wherein the first damping valve 710 is disposed on the second oil passage 620.
The first damping valve 710 can perform a fluid damping function to control a flow rate of the oil in the master cylinder 310 flowing back to the oil tank 110.
The sequence valve 410 is connected to the master cylinder 310 through a third oil passage 630, and the sequence valve 410 is connected to the slave cylinder 320 through a fourth oil passage 640.
The sequence valve 410 has a first operating position 411 and a second operating position 412. When the sequence valve 410 is switched to the second operating position 412, the third oil passage 630 communicates with the fourth oil passage 640, and the oil discharged from the hydraulic pump 120 is sequentially delivered into the slave cylinder 320 through the first oil passage 510, the shuttle valve 200, the third oil passage 630, the sequence valve 410, and the fourth oil passage 640. The lip 820 is disposed on the sub-cylinder 320, and the lip 820 is gradually extended as the sub-cylinder 320 is filled with oil.
In the present embodiment, the priority valve 410 has a set pressure, and when the oil pressure in the third oil passage 630 is higher than or equal to the set pressure, the priority valve 410 is switched to the second operation position 412, and when the oil pressure in the third oil passage 630 is lower than the set pressure, the priority valve 410 is switched to the first operation position 411.
In this embodiment, a second spare oil outlet 920 is disposed on the third oil path 630.
In this embodiment, the logic valve 420 is connected to the sequence valve 410 through a fifth oil passage 650, and the logic valve 420 is connected to the tank 110 through a sixth oil passage 660.
The logic valve 420 has a pass-through bit 421 and a block bit 422. When the sequence valve 410 is located at the first operating position 411 and the logic valve 420 is switched to the through position 421, the fourth oil passage 640 communicates with the fifth oil passage 650, the fifth oil passage 650 communicates with the sixth oil passage 660, and the oil in the sub-cylinder 320 flows back to the oil tank 110 through the fourth oil passage 640, the sequence valve 410, the fifth oil passage 650, the logic valve 420, and the sixth oil passage 660 in this order. As the oil in the slave cylinder 320 flows back to the oil tank 110, the lip 820 gradually descends.
In this embodiment, the logic valve 420 has a first control port, the first control port is connected to the second oil path 620, and the first control port is adapted to sense the oil pressure in the second oil path 620 to control the switching position of the logic valve 420.
In this embodiment, when the shuttle valve 200 switches to the return bit 210, the logic valve 420 switches to the blocking bit 422; when the shuttle valve 200 is switched to the communication position 220, the logic valve 420 is switched to the pass-through position 421.
In this embodiment, the hydraulic power unit 100 further includes: and a second damping valve 720, wherein the second damping valve 720 is provided on the sixth oil path 660.
The second damping valve 720 can play a role of fluid damping, and controls the flow rate of the oil in the slave cylinder 320 in the process of flowing back to the oil tank 110.
The use of the hydraulic power unit 100 is described below.
(1) Initial state: the solenoid valve 400 is closed; the shuttle valve 200 is in the return position 210; the sequence valve 410 is in a first operating position 411; the logic valve 420 is in the pass-through position 421.
(2) When a button (motor start) on an operation panel is pressed, the hydraulic pump 120 is started to suck oil from the oil tank 110. The solenoid valve 400 is electrically opened, the shuttle valve 200 is switched to the communication position 220, and the first oil passage 510 is communicated with the second oil passage 520. The oil is sequentially delivered to the main cylinder 310 through the hydraulic pump 120, the first oil passage 510, the shuttle valve 200, and the second oil passage 520, and the dock leveler 810 ascends.
(3) As the oil in the master cylinder 310 is gradually replenished to the stroke end, the oil pressure in the third oil passage 630 gradually increases. When the oil pressure in the third oil passage 630 increases to the set pressure, the sequence valve 410 is switched to the second operation position 412. The third oil passage 630 is communicated with the fourth oil passage 640, and the oil discharged from the hydraulic pump 120 is sequentially delivered into the slave cylinder 320 through the first oil passage 510, the shuttle valve 200, the third oil passage 630, the sequence valve 410, and the fourth oil passage 640. The lip 820 and the dock leveler 810 are all deployed.
(4) Reset [ motor on ] button, the hydraulic pump 120 is off. The main oil cylinder 310 discharges oil to the second oil passage 520 under the action of gravity, the shuttle valve 200 switches the main oil cylinder to the return position 210, the electromagnetic valve 400 is still in an open state, the first oil passage 610 is communicated with the second oil passage 620, and part of the oil in the main oil cylinder 310 sequentially flows back to the oil tank 110 through the shuttle valve 200, the second oil passage 620, the electromagnetic valve 400 and the first oil passage 610. As the oil in the master cylinder 310 flows back to the oil tank 110, the dock leveler 810 descends slowly. The dock leveler 810 is attached to the truck bed by slowly lowering the dock leveler 810.
When the dock leveler 810 descends slowly, the sequence valve 410 is switched to the first operating position 411, the oil in the master cylinder 310 flows from the second oil passage 620 and the first control port to the logic valve 420, the first control port senses the increase of the oil pressure in the second oil passage 620, when the oil pressure increases to a certain value, the logic valve 420 is switched to the blocking position 422, the fifth oil passage 650 between the sequence valve 410 and the logic valve 420 is blocked, and therefore the oil in the slave cylinder 320 cannot flow back to the oil tank 110, and the position of the lip 820 is not changed.
After the dock leveler 810 is attached to the truck bed, a truck can transport goods between the warehouse dock floor and the bed by means of the dock leveler 810, and the dock leveler 810 can float up and down with the bed.
(5) After the goods are transported and the dock leveler 810 and the lip 820 are ready to be retracted, a [ motor start ] button on an operation panel is pressed for a short time, the shuttle valve 200 is switched to the communication position 220, the hydraulic pump 120 sucks a small amount of oil from the oil tank 110, the oil is sequentially conveyed to the main cylinder 310 through the hydraulic pump 120, the first oil passage 510, the shuttle valve 200 and the second oil passage 520, and the dock leveler 810 slightly ascends to avoid friction with the truck bed.
During the slight ascent of the dock leveler 810, the logic valve 420 is switched to the through position 421, the sequence valve 410 is located at the first operating position 411, the fourth oil passage 640 communicates with the fifth oil passage 650, and the fifth oil passage 650 communicates with the sixth oil passage 660. The oil in the sub cylinder 320 flows back to the oil tank 110 through the fourth oil passage 640, the sequence valve 410, the fifth oil passage 650, the logic valve 420, and the sixth oil passage 660 in this order. As the oil in the sub cylinder 320 flows back to the oil tank 110, the lip 820 is gradually lowered and retracted.
(6) A button for resetting (motor start), the shuttle valve 200 is switched to the return position 210 under the action of gravity, the sequence valve 410 is switched to the second working position 412, the electromagnetic valve 400 is still in an open state at this time, the first oil passage 610 is communicated with the second oil passage 620, oil in the main oil cylinder 310 sequentially flows back to the oil tank 110 through the shuttle valve 200, the second oil passage 620, the electromagnetic valve 400 and the first oil passage 610, and the dock leveler 810 slowly descends and retracts.
In the use process of the hydraulic power unit 100, an operator can control the ascending and descending of the dock leveler and the lip plate by pressing and resetting a button (motor starting) on the operation panel, and the operation is simple.
The hydraulic power unit 100 has high integration level, which is beneficial to reducing the volume and saving the space. The hydraulic power unit 100 is provided with the first spare oil outlet 910 and the second spare oil outlet 920, so that the hydraulic power unit is convenient to match with a boarding bridge with double oil cylinders, and the universality is strong. In addition, the hydraulic power unit 100 can be free of debugging, which helps to save the time for debugging the equipment.
The utility model also provides a hydraulic power system, hydraulic power system includes as above hydraulic power unit 100 still includes: the dock leveler 810 is arranged on the main cylinder 310, and the dock leveler 810 is arranged on the main cylinder 310; and the lip plate 820 is arranged on the auxiliary oil cylinder 320, and the lip plate 820 is connected with the ramp axle 810.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. A hydraulic power unit, comprising:
an oil tank;
the hydraulic pump is connected with the oil tank;
the shuttle valve is provided with a backflow position and a communication position and is connected with the hydraulic pump through a first oil duct;
the shuttle valve is connected with the main oil cylinder through a second oil duct, and when the shuttle valve is switched to a communication position, the first oil duct is communicated with the second oil duct;
the electromagnetic valve is connected with the oil tank through a first oil path and connected with the shuttle valve through a second oil path, and when the shuttle valve is switched to a backflow position, the first oil path is communicated with the second oil path;
the sequence valve is provided with a first working position and a second working position and is connected with the main oil cylinder through a third oil way;
the sequence valve is connected with the auxiliary oil cylinder through a fourth oil path, and when the sequence valve is switched to a second working position, the third oil path is communicated with the fourth oil path;
the logic valve is provided with a through position and a blocking position, the logic valve is connected with the sequence valve through a fifth oil path, the logic valve is connected with the oil tank through a sixth oil path, when the sequence valve is located at a first working position and the logic valve is switched to the through position, the fourth oil path is communicated with the fifth oil path, and the fifth oil path is communicated with the sixth oil path.
2. A hydraulic power unit as claimed in claim 1 wherein said logic valve switches to a blocking position when said shuttle valve switches to a return position; when the shuttle valve is switched to the connected position, the logic valve is switched to the through position.
3. The hydraulic power unit of claim 2, wherein the logic valve has a first control port connected to the second oil passage, the first control port adapted to sense oil pressure in the second oil passage to control the switch position of the logic valve.
4. The hydraulic power unit of claim 1, wherein the sequence valve has a set pressure, and the sequence valve is switched to a second operating position when the oil pressure in the third oil passage is higher than or equal to the set pressure, and is switched to a first operating position when the oil pressure in the third oil passage is lower than the set pressure.
5. The hydraulic power unit of claim 1, wherein a first alternate oil outlet is provided on the second oil passage, and a second alternate oil outlet is provided on the third oil passage.
6. The hydraulic power unit as defined in claim 1, further comprising: and one end of the overflow valve is connected with the hydraulic pump, and the other end of the overflow valve is connected with the oil tank.
7. The hydraulic power unit as defined in claim 1, further comprising: and the first damping valve is arranged on the second oil path.
8. The hydraulic power unit as defined in claim 1, further comprising: and the second damping valve is arranged on the sixth oil path.
9. A hydraulic power system including the hydraulic power unit of any one of claims 1 through 8, further comprising: the boarding bridge is arranged on the main oil cylinder.
10. The hydraulic power system of claim 9, further comprising: the lip plate is arranged on the auxiliary oil cylinder and connected with the dock leveler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287097.3U CN210599620U (en) | 2019-08-09 | 2019-08-09 | Hydraulic power unit and hydraulic power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287097.3U CN210599620U (en) | 2019-08-09 | 2019-08-09 | Hydraulic power unit and hydraulic power system |
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| Publication Number | Publication Date |
|---|---|
| CN210599620U true CN210599620U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921287097.3U Active CN210599620U (en) | 2019-08-09 | 2019-08-09 | Hydraulic power unit and hydraulic power system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719248A (en) * | 2021-06-24 | 2021-11-30 | 江苏徐工工程机械研究院有限公司 | Clamp synchronous control system, clamp device and drilling machine |
| CN113775612A (en) * | 2021-09-18 | 2021-12-10 | 柳州柳工挖掘机有限公司 | Engineering machinery hydraulic control system and engineering machinery |
-
2019
- 2019-08-09 CN CN201921287097.3U patent/CN210599620U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719248A (en) * | 2021-06-24 | 2021-11-30 | 江苏徐工工程机械研究院有限公司 | Clamp synchronous control system, clamp device and drilling machine |
| CN113719248B (en) * | 2021-06-24 | 2024-04-30 | 江苏徐工工程机械研究院有限公司 | Clamp synchronous control system, clamp device and drilling machine |
| CN113775612A (en) * | 2021-09-18 | 2021-12-10 | 柳州柳工挖掘机有限公司 | Engineering machinery hydraulic control system and engineering machinery |
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