CN115369946B - Excavator with external pump station - Google Patents
Excavator with external pump station Download PDFInfo
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- CN115369946B CN115369946B CN202210843432.3A CN202210843432A CN115369946B CN 115369946 B CN115369946 B CN 115369946B CN 202210843432 A CN202210843432 A CN 202210843432A CN 115369946 B CN115369946 B CN 115369946B
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- external pump
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 150
- 239000003921 oil Substances 0.000 claims description 136
- 238000002485 combustion reaction Methods 0.000 claims description 32
- 238000011084 recovery Methods 0.000 claims description 31
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 239000000446 fuel Substances 0.000 description 7
- 238000000605 extraction Methods 0.000 description 6
- 230000008676 import Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention relates to the technical field of engineering machinery, in particular to an excavator with an external pump station. The utility model provides an excavator with external pump station, includes external pump station and excavator body, external pump station with the excavator body is two mutually independent individuals, the excavator body is the same with current excavator function, can independently work, external pump station is arranged in the outside of excavator body, be connected through hydraulic line between external pump station and the excavator body, can constantly pass through high-pressure hydraulic oil hydraulic line carries to the excavator body, make the excavator body can carry out normal excavation work. According to the invention, the power source and the actuator are detachably separated, so that the excavator is more flexible and convenient to use, the time can be greatly saved, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to an excavator with an external pump station.
Background
In the working process of the existing excavator, the existing excavator mainly works by means of power supplied by an internal combustion engine, the fuel of the internal combustion engine is diesel, the profit of the excavator owner is reduced along with the increase of the internal competition of the industry and the increase of the price of the fuel, and in addition, the environmental protection requirement of the internal combustion engine of the country is more and more strict, so that the internal combustion engine of the excavator is replaced with the natural trend. At present, although some excavators are electrically modified, the excavators are driven by motors, the excavators carry a large number of batteries, and the electric energy of the motors is provided by the batteries, but the battery is charged in a very troublesome manner, a charging station is arranged at each construction site, the charging time of the large-scale batteries of the excavators can be very long, the construction efficiency is influenced, and particularly for some time-critical projects, the work is usually stopped by people, and the construction is greatly influenced by frequent charging. In addition, in some special occasions, the excavator needs to perform overload and overspeed operation in a short time, but due to the limitation of the power of the excavator, the overload and overspeed operation becomes very laborious and affects the smooth progress of engineering. In order to solve the problems, the invention provides an excavator with an external pump station.
Disclosure of Invention
The excavator with the external pump station can flexibly replace a power system of the excavator so as to realize the work with stronger economy, better environmental protection, higher efficiency and stronger power according to actual needs.
In order to achieve the above object, according to an aspect of the present invention, there is provided an excavator having an external pump station, including: external pump station and excavator body.
The external pump station and the excavator body are two mutually independent individuals, and the excavator body has the same function as the existing excavator, carries all parts capable of realizing the excavating work and can independently work. The external pump station is arranged outside the excavator body, the external pump station is connected with the excavator body through a hydraulic pipeline, the external pump station can boost pressure of hydraulic oil carried by the external pump station, and can continuously convey high-pressure hydraulic oil to the excavator body through the hydraulic pipeline, so that the excavator body can work by means of the input high-pressure hydraulic oil under the condition that an engine of the excavator body does not work, normal excavating work is carried out, and redundant low-pressure hydraulic oil in the excavator body can flow through the hydraulic pipeline and can flow into the external pump station, thereby being capable of avoiding the internal combustion engine in the excavator body to work.
The excavator body is provided with two ports, one is a hydraulic oil inlet, the other is a hydraulic oil outlet, the hydraulic oil inlet is connected to the high-pressure side of the excavator body integral hydraulic system, the hydraulic oil outlet is connected to the low-pressure side of the excavator body integral hydraulic system, the hydraulic pipeline is connected to the hydraulic oil inlet and the hydraulic oil outlet, high-pressure hydraulic oil is input through the hydraulic oil inlet, and low-pressure hydraulic oil is output through the hydraulic oil outlet.
The invention has the advantages that:
(1) In the working process of the excavator body depending on an external pump station, the internal combustion engine of the excavator body does not work, so that the shaking of the excavator body and high decibel noise caused by the work of the internal combustion engine are avoided, the comfort of an excavator driver in the working process is enhanced, and the physical and psychological health of the driver is guaranteed;
(2) In the working process of the excavator body depending on the external pump station, the internal combustion engine of the excavator body does not work, so that the power system of the excavator body can be in a rest state for a long time, the whole service life of the excavator body is prolonged, and the use cost is reduced;
(3) The power of the excavator body is mostly an internal combustion engine at present, but the power of the external pump station can be changed according to various situations, for example, in places with lower electric power price, the external pump station can be completely driven by electric power, so that the use of diesel oil can be reduced, the environment is protected, and the use cost can be reduced;
(4) In the working process of the excavator body depending on the external pump station, once the external pump station fails, the excavator body can be immediately switched into self diesel power to work, so that the influence of mechanical failure on the normal working progress is avoided, and the working efficiency is improved;
(5) In the working process of the excavator body depending on the external pump station, a plurality of pump stations can serve one excavator body, if one pump station stops working, other pump stations can be immediately switched, power is not interrupted, the excavator body can work for a long time without interruption, and efficiency is improved;
(6) When the total output power of the external pump station is larger than that of the excavator body, the excavator body can provide larger load and faster speed in a short time, so that the excavator body can operate in an overload manner in a short time, high-load occasions which occur less can be flexibly dealt with, the condition that the main excavator buys larger equipment for a small number of special occasions is avoided, and the whole cost can be saved.
Further, the hydraulic pipeline includes high-pressure oil input pipe and low-pressure oil recovery pipe, the high-pressure oil input pipe is followed external pump station to the pipeline of carrying oil in the excavator body, the low-pressure oil recovery pipe is followed the excavator body to carry out the oil return in the external pump station, the quantity of high-pressure oil input pipe is more than or equal to one, the quantity of high-pressure oil input pipe equals the quantity of pumps in the external pump station, the quantity of pumps in the external pump station is more than or equal to one, through setting up a plurality of pumps and multitube transportation, can reduce pressure loss, promote work efficiency, increase equipment redundancy, reduce the fault rate, the flow direction in the high-pressure oil input pipe is external pump station to the excavator body, the flow direction in the low-pressure oil recovery pipe is for the excavator body to external pump station, the high-pressure oil input pipe is connected to the hydraulic oil import, can be many high-pressure oil input pipe is connected to a plurality of hydraulic oil import, also can be many high-pressure oil input pipe is connected to one hydraulic oil import, low pressure oil pipe is connected to the hydraulic oil export recovery.
Further, the external pump station includes power supply, booster, bin, the output shaft of power supply with the input shaft of booster is connected, the power supply can be the equipment that provides motive power promptly, can be the motor, also can be the internal-combustion engine, and the motor can adopt the battery power supply, also can adopt external circuit power supply, the booster is the hydraulic pump promptly, the power supply work can drive the booster work, the input hole of booster with the bin is connected, and the motion the booster can follow extract hydraulic oil in the bin, the output hole of booster with high pressure oil input tube links to each other, the booster can send the hydraulic oil of extraction into high pressure oil input tube, the low pressure oil recovery tube is connected to the bin, follow the hydraulic oil of retrieving in the low pressure oil recovery tube can reenter the bin, realizes the circulation flow of hydraulic oil.
Further, the movable wheels are arranged below the external pump station and can move according to the requirement.
Further, the movable wheel is further provided with a rotation source and a movable controller, so the rotation source is a motor, an internal combustion engine or a hydraulic motor, the rotation source is connected with the movable wheel, the movable wheel can rotate, and further the external pump station is moved, the movable controller can drive the power source to output power, the movable controller can be a manual controller, a remote controller, an automatic controller and the like, if the movable controller is an automatic controller, the external pump station can automatically follow the excavator body to move, and also the external pump station can be controlled to automatically return to a parking point when the external pump station is not needed.
In one embodiment, the hydraulic oil inlet and the hydraulic oil outlet are arranged on the upper vehicle body and can rotate along with the upper vehicle body, the excavator body is provided with a first input switching valve and a first output switching valve, the first input switching valve is provided with two inlets, one inlet of the first input switching valve is connected to the hydraulic oil inlet, the other inlet of the first input switching valve is connected to the inlet and the outlet of the original vehicle-mounted hydraulic pump, the output switching valve is provided with two outlets, one outlet of the first output switching valve is connected to the hydraulic oil outlet, the other outlet of the first output switching valve is connected to the original vehicle-mounted hydraulic oil tank, the first input switching valve and the first output switching valve can be electric valves or manual valves, and the hydraulic oil source of the excavator body can be selected or the external pump station by rotating the first input switching valve and the first output switching valve.
In another embodiment, the hydraulic oil inlet and the hydraulic oil outlet are arranged on the lower vehicle body and do not rotate along with the upper vehicle body, in the existing excavator, the lower vehicle body is provided with two hydraulic motors, each hydraulic motor drives one crawler wheel to rotate, a rotary joint is arranged between the upper vehicle body and the lower vehicle body and is connected with the upper vehicle body and the lower vehicle body, oil can be supplied to the lower vehicle body in the rotating process of the upper vehicle body, an input oil pipe and an output oil pipe are arranged between the rotary joint and each hydraulic motor, no non-return device is arranged between the hydraulic motor and the main oil pipe of the whole vehicle, a second input switching valve is arranged on the input oil pipe between the rotary joint and the hydraulic motor, a second output switching valve is arranged on the output oil pipe between the rotary joint and the hydraulic motor, the hydraulic oil inlet is connected to the second input switching valve, the hydraulic oil outlet is connected to the second output switching valve, a first locking valve is arranged at the main pump outlet of the excavator body, a second locking valve is arranged at the inlet of the hydraulic oil tank of the excavator body, when the excavator body is used, hydraulic oil in the excavator body flows back to the power system through the main oil pipe of the excavator body, and the excavator is driven to work in a power pump station.
In another embodiment, the hydraulic oil inlet and the hydraulic oil outlet are formed in the lower vehicle body, the swivel joint is lengthened on the basis of the existing swivel joint, an oil inlet and an oil outlet are additionally formed, the oil inlet is connected with the hydraulic oil inlet at one side of the lower vehicle body, the oil outlet is connected with the hydraulic oil outlet at one side of the lower vehicle body, the oil inlet is connected to a position, close to a vehicle-mounted main pump, of an integral main oil pipe at one side of the upper vehicle body, the oil outlet is connected to a position, close to a vehicle-mounted oil tank, of the integral main oil pipe at one side of the oil outlet, a first locking valve is arranged at the main pump outlet of the excavator body, a second locking valve is arranged at the inlet of the hydraulic oil tank of the excavator body, hydraulic oil in the external pump station flows into a main oil path through the swivel joint when the external pump station is used for supplying oil, the excavator body is driven to work, and a power system in the excavator body is not operated.
Compared with the prior art, the invention has the beneficial effects that:
(1) The utility model provides an excavator with external pump station, through the mode at the outside external pump station that sets up of excavator body, can realize the outside input of high-pressure hydraulic oil, avoided the inside actuating system of excavator body to work to noise in the driver's cabin has been reduced, the shake of excavator body has been reduced, the travelling comfort of driver and crew has been promoted, the life of excavator body has been prolonged, use cost has been practiced thrift, external pump station also conveniently overhauls and maintains simultaneously, the economic nature of using can be promoted.
(2) The external pump station arranged outside is relatively more convenient to detach from the excavator body, once the external pump station fails, the external pump station can be replaced in a short time, and the external pump station can also be switched into driving equipment in the excavator to work in a short time, so that the influence of damage of engineering equipment on the engineering progress is effectively avoided; meanwhile, the replaceable external pump station can realize that a plurality of external pump stations serve an excavator body, so that the excavator body can work for a long time, meanwhile, a plurality of mutually matched drivers can realize the work that the work is stopped continuously, thereby improving the working efficiency, and more profits are brought by the excavator body which continuously works.
(3) Most of the existing excavators are driven by an internal combustion engine, but with the importance of the state on environmental protection and the rising of petroleum price, the application range of the internal combustion engine is smaller and smaller, and at present, although some electric excavators are appeared, most of the existing excavators are stored by a storage battery, and are influenced by the characteristics of the storage battery, the electric excavators cannot work for a long time, and the electric excavators need to be stopped for charging every time, so that the working efficiency is greatly influenced. The excavator adopting the external pump station does not have the problem, the external pump station can be driven by an internal combustion engine, can also be driven by a motor, adopts the external pump station driven by the motor, can be powered by a battery, can also be powered by a social power grid, can be replaced immediately after the external pump station is stopped for reasons, does not affect normal engineering, is beneficial to improving the working efficiency and reduces the cost.
(4) The working power of the external pump station can be larger than that of the excavator body, so that the hydraulic system of the excavator body does not need to reserve larger redundancy, the overall manufacturing cost is reduced, purchasing cost is reduced, the overload and overspeed work of the excavator body can be performed in a short time by the larger working power of the external pump station, the work which can be completed by partial larger excavator can be completed, and the use cost can be saved.
Drawings
FIG. 1 is a schematic view of an embodiment of an excavator having an external pump station according to the present invention;
FIG. 2 is a schematic diagram of a hydraulic system of an embodiment one of the excavator with an external pump station of the present invention
FIG. 3 is a schematic diagram of a second embodiment of an excavator with an external pump station according to the present invention;
FIG. 4 is a schematic diagram of a hydraulic system of a second embodiment of an excavator having an external pump station according to the present invention;
FIG. 5 is a schematic view of a third and fourth embodiment of an excavator having an outboard pump station of the present invention;
FIG. 6 is a schematic diagram of a hydraulic system of a third embodiment of an excavator having an outboard pump station of the present invention;
FIG. 7 is a schematic diagram of a fifth exemplary embodiment of an excavator having an outboard pump station of the present invention;
FIG. 8 is a schematic diagram of a hydraulic system of a fourth embodiment of an excavator having an external pump station according to the present invention;
FIG. 9 is a schematic diagram of a hydraulic system of a fifth embodiment of an excavator having an external pump station according to the present invention;
FIG. 10 is an enlarged view of a swing joint portion of the fourth and fifth embodiments of an excavator having an outboard pump station of the present invention;
fig. 11 is a schematic view of a conventional swing joint for an excavator.
The correspondence between the reference numerals and the component names in fig. 1 to 11 is:
1-external pump station, 101-power source, 102-booster, 103-storage tank, 104-movable wheels, 1041-rotation source, 1042-movable controller, 2-excavator body, 201-hydraulic oil inlet, 202-hydraulic oil outlet, 203-first input switching valve, 204-first output switching valve, 205-second input switching valve, 206-second output switching valve, 207-first locking valve, 208-second locking valve, 209-oil inlet, 210-oil outlet, 3-hydraulic pipeline, 301-high-pressure oil input pipe, 302-low-pressure oil recovery pipe and 4-swivel joint.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
An excavator with an external pump station according to some embodiments of the present invention is described below with reference to fig. 1-11.
Example 1
As shown in fig. 1 and 2, an excavator with an external pump station comprises an external pump station 1 and an excavator body 2.
The external pump station 1 comprises a power source 101, a booster 102 and a storage tank 103, wherein the power source 101 is an electric motor or an internal combustion engine, the electric motor supplies power depending on a storage battery or a power grid, the internal combustion engine runs depending on fuel, the booster 102 is a hydraulic pump, an output shaft of the internal combustion engine or the electric motor is connected with an input shaft of the hydraulic pump to drive the hydraulic pump to run, an input end of the hydraulic pump is connected with the storage tank 103, and the hydraulic pump can extract hydraulic oil from the storage tank 103 and pressurize the hydraulic oil. To reduce the failure rate, redundancy is added, and the number of hydraulic pumps may be more than one.
The specific structure inside the excavator body 2 is the same as the basic structure of the existing excavator, and the specific conventional working structure is not in the protection scope of the invention, so the detailed description of the structure is omitted, and only the points to be protected are described. The upper body of the excavator body 2 is provided with a hydraulic oil inlet 201 and a hydraulic oil outlet 202, the inside of the excavator body 2 is provided with a first input switching valve 203 and a first output switching valve 204, the two valves can be electric valves or manual valves, the first input switching valve 203 is provided with two inlets, one inlet of the first input switching valve 203 is connected to the hydraulic oil inlet 201, the other inlet is connected to an outlet of an original vehicle-mounted hydraulic pump, the outlet of the first input switching valve 203 is connected to the high-pressure side of a main oil way, the first output switching valve 204 is provided with two outlets, one outlet of the first output switching valve 204 is connected to the hydraulic oil outlet 202, the other outlet is connected to an original vehicle-mounted hydraulic oil tank, and the inlet of the first output switching valve 204 is connected to the low-pressure side of the main oil way.
The external pump station 1 is connected with the excavator body 2 through a hydraulic pipeline 3, the hydraulic pipeline 3 comprises high-pressure oil input pipes 301 and low-pressure oil recovery pipes 302, the number of the high-pressure oil input pipes 301 is the same as that of the hydraulic pumps in the external pump station 1, one end of each hydraulic oil input pipe 301 is connected to an outlet of each hydraulic pump, the other end of each hydraulic oil input pipe is connected to a hydraulic oil inlet 201, one end of each low-pressure oil recovery pipe 302 is connected to a storage tank 103 in the external pump station 1, and the other end of each low-pressure oil recovery pipe 302 is connected to a hydraulic oil outlet 202.
During the use, in external pump station 1, power supply 101 drives booster 102 and operates, and the hydraulic oil in the extraction bin 103 is carried in the excavator body 2 through high-pressure oil input pipe 301 and is supplied with the excavator and use after the pressurization, and unnecessary hydraulic oil in the excavator body 2 can be carried back to the bin 103 in the external pump station 1 through low-pressure oil recovery pipe 302. In use, the excavator body 2 can select whether to use the hydraulic power of the external pump station 1 or the hydraulic power of the excavator body 2 itself by rotating the first input switching valve 203 and the first output switching valve 204. The working range of the excavator body 2 depends on the length of the hydraulic line 3.
Example two
As shown in fig. 3 and 4, the excavator with the external pump station comprises the external pump station 1 and an excavator body 2.
The external pump station 1 comprises a power source 101, a booster 102 and a storage tank 103, wherein the power source 101 is an electric motor or an internal combustion engine, the electric motor supplies power depending on a storage battery or a power grid, the internal combustion engine runs depending on fuel, the booster 102 is a hydraulic pump, an output shaft of the internal combustion engine or the electric motor is connected with an input shaft of the hydraulic pump to drive the hydraulic pump to run, an input end of the hydraulic pump is connected with the storage tank 103, and the hydraulic pump can extract hydraulic oil from the storage tank 103 and pressurize the hydraulic oil. To reduce the failure rate, redundancy is added, and the number of hydraulic pumps may be more than one. The movable wheels 104 are arranged below the external pump station 1, the movable wheels 104 are provided with a rotation source 1041 and a movable controller 1042, the rotation source 1041 is an internal combustion engine or an electric motor, the rotation source 1041 drives the movable wheels 104 to rotate so that the external pump station 1 moves, the movable controller 1042 can drive the rotation source 1041 to output power, the movable controller 1042 can be a manual controller or an automatic controller, and an automatic pilot can be arranged in the automatic controller, so that the excavator body 2 can pull the external pump station 1 to move, or the external pump station 1 can automatically move along with the excavator body 2, and the specific movement mode and structure of the external pump station 1 are common technologies in the existing vehicle field and are not in the protection scope of the invention, so that the description is omitted. The working range of the excavator body 2 is any position, and the external pump station 1 moves together with the excavator body 2.
The specific structure inside the excavator body 2 is the same as the basic structure of the existing excavator, and the specific conventional working structure is not in the protection scope of the invention, so the detailed description of the structure is omitted, and only the points to be protected are described. The upper body of the excavator body 2 is provided with a hydraulic oil inlet 201 and a hydraulic oil outlet 202, the inside of the excavator body 2 is provided with a first input switching valve 203 and a first output switching valve 204, the two valves can be electric valves or manual valves, the first input switching valve 203 is provided with two inlets, one inlet of the first input switching valve 203 is connected to the hydraulic oil inlet 201, the other inlet is connected to an outlet of an original vehicle-mounted hydraulic pump, the outlet of the first input switching valve 203 is connected to the high-pressure side of a main oil way, the first output switching valve 204 is provided with two outlets, one outlet of the first output switching valve 204 is connected to the hydraulic oil outlet 202, the other outlet is connected to an original vehicle-mounted hydraulic oil tank, and the inlet of the first output switching valve 204 is connected to the low-pressure side of the main oil way.
The external pump station 1 is connected with the excavator body 2 through a hydraulic pipeline 3, the hydraulic pipeline 3 comprises high-pressure oil input pipes 301 and low-pressure oil recovery pipes 302, the number of the high-pressure oil input pipes 301 is the same as that of the hydraulic pumps in the external pump station 1, one end of each hydraulic oil input pipe 301 is connected to an outlet of each hydraulic pump, the other end of each hydraulic oil input pipe is connected to a hydraulic oil inlet 201, one end of each low-pressure oil recovery pipe 302 is connected to a storage tank 103 in the external pump station 1, and the other end of each low-pressure oil recovery pipe 302 is connected to a hydraulic oil outlet 202.
During the use, in external pump station 1, power supply 101 drives booster 102 and operates, and the hydraulic oil in the extraction bin 103 is carried in the excavator body 2 through high-pressure oil input pipe 301 and is supplied with the excavator and use after the pressurization, and unnecessary hydraulic oil in the excavator body 2 can be carried back to the bin 103 in the external pump station 1 through low-pressure oil recovery pipe 302. In use, the excavator body 2 can select whether to use the hydraulic power of the external pump station 1 or the hydraulic power of the excavator body 2 itself by rotating the first input switching valve 203 and the first output switching valve 204. The external pump station 1 can also move along with the excavator body 2 in the moving process.
Example III
As shown in fig. 5 and 6, an excavator with an external pump station comprises an external pump station 1 and an excavator body 2.
The external pump station 1 comprises a power source 101, a booster 102 and a storage tank 103, wherein the power source 101 is an electric motor or an internal combustion engine, the electric motor supplies power depending on a storage battery or a power grid, the internal combustion engine runs depending on fuel, the booster 102 is a hydraulic pump, an output shaft of the internal combustion engine or the electric motor is connected with an input shaft of the hydraulic pump to drive the hydraulic pump to run, an input end of the hydraulic pump is connected with the storage tank 103, and the hydraulic pump can extract hydraulic oil from the storage tank 103 and pressurize the hydraulic oil. To reduce the failure rate, redundancy is added, and the number of hydraulic pumps may be more than one.
The specific structure inside the excavator body 2 is the same as the basic structure of the existing excavator, and the specific conventional working structure is not in the protection scope of the invention, so the detailed description of the structure is omitted, and only the points to be protected are described. The excavator body 2 is provided with a hydraulic oil inlet 201 and a hydraulic oil outlet 202 on a lower vehicle body, two hydraulic motors are arranged in the existing lower vehicle body, each hydraulic motor drives one crawler wheel to rotate so as to realize rotation of the crawler, a rotary joint 4 is arranged between the upper vehicle body and the lower vehicle body, the rotary joint 4 is shown in fig. 11, the upper half part of the rotary joint 4 is connected with the upper vehicle body, the lower half part of the rotary joint 4 is connected with the lower vehicle body, the upper and lower parts of the rotary joint 4 can rotate relatively and are used for conveying hydraulic oil, an input oil pipe and an output oil pipe are arranged between the lower half part of the rotary joint 4 and each hydraulic motor, as shown in fig. 2 and 4, a non-return device is not arranged between the hydraulic motor and the whole main oil pipe, a second input switching valve 205 is connected in series on the input oil pipe between the rotary joint 4 and the hydraulic motor, a second output switching valve 206 is connected in series on the output oil pipe between the rotary joint 4 and the hydraulic motor, the two valves are three-way valves and can also be manual valves, the hydraulic oil inlet 201 is connected to the second input switching valve 205, the hydraulic oil outlet 202 is connected to the second main pump station 2, and the main pump station 2 can be prevented from flowing into the excavator body along the main body 2 when the main body is locked by the main pump station 2, and the main pump station is closed by the main body 2.
The external pump station 1 is connected with the excavator body 2 through a hydraulic pipeline 3, the hydraulic pipeline 3 comprises high-pressure oil input pipes 301 and low-pressure oil recovery pipes 302, the number of the high-pressure oil input pipes 301 is the same as that of the hydraulic pumps in the external pump station 1, one end of each hydraulic oil input pipe 301 is connected to an outlet of each hydraulic pump, the other end of each hydraulic oil input pipe is connected to a hydraulic oil inlet 201, one end of each low-pressure oil recovery pipe 302 is connected to a storage tank 103 in the external pump station 1, and the other end of each low-pressure oil recovery pipe 302 is connected to a hydraulic oil outlet 202.
During the use, in external pump station 1, power supply 101 drives booster 102 and operates, and the hydraulic oil in the extraction bin 103 is carried in the excavator body 2 through high-pressure oil input pipe 301 and is supplied with the excavator and use after the pressurization, and unnecessary hydraulic oil in the excavator body 2 can be carried back to the bin 103 in the external pump station 1 through low-pressure oil recovery pipe 302. In use, the excavator body 2 can select whether to use the hydraulic power of the external pump station 1 or the hydraulic power of the excavator body 2 itself by rotating the first input switching valve 203 and the first output switching valve 204. The working range of the excavator body 2 depends on the length of the hydraulic line 3. Because the hydraulic oil of the external pump station 1 flows back to the main oil way of the excavator body 2 along the rotary joint 4 from the lower vehicle body of the excavator body 2, the excavator body 2 cannot move in the use process, and the excavator is suitable for the excavation of fixed points, but has the advantages that the hydraulic oil inlet 201 and the hydraulic oil outlet 202 cannot rotate, and the hydraulic pipeline 3 cannot be wound and knotted.
Example IV
As shown in fig. 5, 8 and 10, an excavator with an external pump station comprises an external pump station 1 and an excavator body 2.
The external pump station 1 comprises a power source 101, a booster 102 and a storage tank 103, wherein the power source 101 is an electric motor or an internal combustion engine, the electric motor supplies power depending on a storage battery or a power grid, the internal combustion engine runs depending on fuel, the booster 102 is a hydraulic pump, an output shaft of the internal combustion engine or the electric motor is connected with an input shaft of the hydraulic pump to drive the hydraulic pump to run, an input end of the hydraulic pump is connected with the storage tank 103, and the hydraulic pump can extract hydraulic oil from the storage tank 103 and pressurize the hydraulic oil. To reduce the failure rate, redundancy is added, and the number of hydraulic pumps may be more than one.
The specific structure inside the excavator body 2 is the same as the basic structure of the existing excavator, and the specific conventional working structure is not in the protection scope of the invention, so the detailed description of the structure is omitted, and only the points to be protected are described. The hydraulic oil inlet 201 and the hydraulic oil outlet 202 are formed in the lower vehicle body of the excavator body 2, the rotary joint 4 is formed between the upper vehicle body and the lower vehicle body, the rotary joint 4 is lengthened on the basis of the existing rotary joint 4, an oil inlet 209 and an oil outlet 210 are additionally formed, the existing rotary joint 4 is shown in fig. 10, the oil inlet 209 and the oil outlet 210 are in one-to-one correspondence with each other in the upper half part and the lower half part of the rotary joint 4, the flow of hydraulic oil between the upper part and the lower part of the rotary joint 4 can be realized, the oil inlet 209 is connected with the hydraulic oil inlet 201 on one side of the lower vehicle body, the oil outlet 210 is connected with the hydraulic oil outlet 202 on one side of the lower vehicle body, the oil inlet 209 is connected to a position of the whole main oil pipe close to a vehicle-mounted main pump on one side of the upper vehicle body, the one side of the oil outlet 210 is connected to a position of the whole main oil pipe close to a vehicle-mounted oil tank, at this moment, hydraulic oil flowing in from the hydraulic oil inlet 201 can directly enter a main oil path of the excavator body 2, a first locking valve 207 is arranged at the main pump outlet of the excavator body 2, the hydraulic oil outlet of the excavator body 2 can be prevented from flowing along the main pump station 2 when the excavator body 2 is used, the hydraulic oil can flow back along the main pump body 2 can be prevented from flowing in the main pump station 2 of the excavator body 2, and the main pump station can be prevented from flowing into the main pump station 2 when the main pump station 2 is prevented from the external pump 1.
The external pump station 1 is connected with the excavator body 2 through a hydraulic pipeline 3, the hydraulic pipeline 3 comprises high-pressure oil input pipes 301 and low-pressure oil recovery pipes 302, the number of the high-pressure oil input pipes 301 is the same as that of the hydraulic pumps in the external pump station 1, one end of each hydraulic oil input pipe 301 is connected to an outlet of each hydraulic pump, the other end of each hydraulic oil input pipe is connected to a hydraulic oil inlet 201, one end of each low-pressure oil recovery pipe 302 is connected to a storage tank 103 in the external pump station 1, and the other end of each low-pressure oil recovery pipe 302 is connected to a hydraulic oil outlet 202.
During the use, in external pump station 1, power supply 101 drives booster 102 and operates, and the hydraulic oil in the extraction bin 103 is carried in the excavator body 2 through high-pressure oil input pipe 301 and is supplied with the excavator and use after the pressurization, and unnecessary hydraulic oil in the excavator body 2 can be carried back to the bin 103 in the external pump station 1 through low-pressure oil recovery pipe 302. During the use, the hydraulic oil of external pump station 1 can enter the main oil circuit of excavator body 2 through hydraulic oil import 201, inlet port 209, and unnecessary hydraulic oil in the excavator body 2 can return external pump station 1 through oil outlet port 210, hydraulic oil export 202. The working range of the excavator body 2 depends on the length of the hydraulic line 3.
Example five
As shown in fig. 7, 9 and 10, an excavator with an external pump station comprises an external pump station 1 and an excavator body 2.
The external pump station 1 comprises a power source 101, a booster 102 and a storage tank 103, wherein the power source 101 is an electric motor or an internal combustion engine, the electric motor supplies power depending on a storage battery or a power grid, the internal combustion engine runs depending on fuel, the booster 102 is a hydraulic pump, an output shaft of the internal combustion engine or the electric motor is connected with an input shaft of the hydraulic pump to drive the hydraulic pump to run, an input end of the hydraulic pump is connected with the storage tank 103, and the hydraulic pump can extract hydraulic oil from the storage tank 103 and pressurize the hydraulic oil. To reduce the failure rate, redundancy is added, and the number of hydraulic pumps may be more than one. The movable wheels 104 are arranged below the external pump station 1, the movable wheels 104 are provided with a rotation source 1041 and a movable controller 1042, the rotation source 1041 is an internal combustion engine or an electric motor, the rotation source 1041 drives the movable wheels 104 to rotate so that the external pump station 1 moves, the movable controller 1042 can drive the rotation source 1041 to output power, the movable controller 1042 can be a manual controller or an automatic controller, and an automatic pilot can be arranged in the automatic controller, so that the excavator body 2 can pull the external pump station 1 to move, or the external pump station 1 can automatically move along with the excavator body 2, and the specific movement mode and structure of the external pump station 1 are common technologies in the existing vehicle field and are not in the protection scope of the invention, so that the description is omitted. The working range of the excavator body 2 is any position, and the external pump station 1 moves together with the excavator body 2.
The specific structure inside the excavator body 2 is the same as the basic structure of the existing excavator, and the specific conventional working structure is not in the protection scope of the invention, so the detailed description of the structure is omitted, and only the points to be protected are described. The hydraulic oil inlet 201 and the hydraulic oil outlet 202 are formed in the lower vehicle body of the excavator body 2, the rotary joint 4 is formed between the upper vehicle body and the lower vehicle body, the rotary joint 4 is lengthened on the basis of the existing rotary joint 4, an oil inlet 209 and an oil outlet 210 are additionally formed, the existing rotary joint 4 is shown in fig. 11, the oil inlet 209 and the oil outlet 210 are in one-to-one correspondence with each other in the upper half part and the lower half part of the rotary joint 4, the flow of hydraulic oil between the upper part and the lower part of the rotary joint 4 can be realized, the oil inlet 209 is connected with the hydraulic oil inlet 201 on one side of the lower vehicle body, the oil outlet 210 is connected with the hydraulic oil outlet 202 on one side of the lower vehicle body, the oil inlet 209 is connected to a position of the whole main oil pipe close to a vehicle-mounted main pump on one side of the upper vehicle body, the one side of the oil outlet 210 is connected to a position of the whole main oil pipe close to a vehicle-mounted oil tank, at this moment, hydraulic oil flowing in from the hydraulic oil inlet 201 can directly enter a main oil path of the excavator body 2, a first locking valve 207 is arranged at the main pump outlet of the excavator body 2, the hydraulic oil outlet of the excavator body 2 can be prevented from flowing along the main pump station 2 when the excavator body 2 is used, the hydraulic oil can flow back along the main pump body 2 can be prevented from flowing in the main pump station 2 of the excavator body 2, and the main pump station can be prevented from flowing into the main pump station 2 when the main pump station 2 is prevented from the external pump station 2 is provided with the external valve 2.
The external pump station 1 is connected with the excavator body 2 through a hydraulic pipeline 3, the hydraulic pipeline 3 comprises high-pressure oil input pipes 301 and low-pressure oil recovery pipes 302, the number of the high-pressure oil input pipes 301 is the same as that of the hydraulic pumps in the external pump station 1, one end of each hydraulic oil input pipe 301 is connected to an outlet of each hydraulic pump, the other end of each hydraulic oil input pipe is connected to a hydraulic oil inlet 201, one end of each low-pressure oil recovery pipe 302 is connected to a storage tank 103 in the external pump station 1, and the other end of each low-pressure oil recovery pipe 302 is connected to a hydraulic oil outlet 202.
During the use, in external pump station 1, power supply 101 drives booster 102 and operates, and the hydraulic oil in the extraction bin 103 is carried in the excavator body 2 through high-pressure oil input pipe 301 and is supplied with the excavator and use after the pressurization, and unnecessary hydraulic oil in the excavator body 2 can be carried back to the bin 103 in the external pump station 1 through low-pressure oil recovery pipe 302. During the use, the hydraulic oil of external pump station 1 can enter the main oil circuit of excavator body 2 through hydraulic oil import 201, inlet port 209, and unnecessary hydraulic oil in the excavator body 2 can return external pump station 1 through oil outlet port 210, hydraulic oil export 202. The external pump station 1 can also move along with the movement of the excavator body 2 in the moving process, so that the excavator body can be used at any position.
It should be noted that, the reference signs such as "holes", "points" and "lines" in the drawings are only for convenience of description, and are not equivalent to the actual product in terms of location and structure, and should not be construed as limiting the scope of protection of the invention or limiting the specification form of the product.
In the present invention, the terms "first," "second," "third," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance: the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same implementations or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the present invention, the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "middle", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An excavator with an external pump station, comprising:
The external pump station (1) and the excavator body (2) are connected through a hydraulic pipeline (3), the external pump station (1) provides high-pressure hydraulic oil for the excavator body (2) and recovers low-pressure hydraulic oil from the excavator body (2), the excavator body (2) is an actuator and performs normal excavating work, the excavator is the same as the existing excavator, the excavator body (2) is provided with a hydraulic oil inlet (201) and a hydraulic oil outlet (202), the hydraulic pipeline (3) is connected to the positions of the hydraulic oil inlet (201) and the hydraulic oil outlet (202),
The hydraulic oil inlet (201) and the hydraulic oil outlet (202) are arranged on a lower vehicle body, the lower vehicle body is provided with two hydraulic motors, each hydraulic motor drives one crawler wheel to rotate, a rotary joint is arranged between the upper vehicle body and the lower vehicle body, an input oil pipe and an output oil pipe are arranged between the rotary joint and each hydraulic motor, a non-return device is arranged between the hydraulic motor and a main oil pipe of the whole vehicle, a second input switching valve (205) is arranged on the input oil pipe between the rotary joint and the hydraulic motor, a second output switching valve (206) is arranged on the output oil pipe between the rotary joint and the hydraulic motor, the hydraulic oil inlet (201) is connected to the second input switching valve (205), the hydraulic oil outlet (202) is connected to the second output switching valve (206), a first locking valve (207) is arranged at the main pump outlet of the excavator body (2), and a second locking valve (208) is arranged at the inlet of the hydraulic oil tank of the excavator body (2).
2. An excavator with an external pump station according to claim 1, characterized by further comprising another embodiment, said hydraulic oil inlet (201) and hydraulic oil outlet (202) are on the lower body, the swivel joint is lengthened on the basis of the existing swivel joint, and an oil inlet hole (209) and an oil outlet hole (210) are added, said oil inlet hole (209) is connected with said hydraulic oil inlet (201) on one side of the lower body, said oil outlet hole (210) is connected with the hydraulic oil outlet (202) on one side of the lower body, said oil inlet hole (209) is connected to the position of the whole main oil pipe near the main pump on the upper body, one side of said oil outlet hole (210) is connected to the position of the whole main oil pipe near the main pump on the vehicle, the main pump outlet of the excavator body (2) is provided with a first locking valve (207), and the inlet of the hydraulic oil tank of the excavator body (2) is provided with a second locking valve (208).
3. An excavator with an external pump station according to claim 1, characterized in that the hydraulic line (3) comprises a high pressure oil input pipe (301) and a low pressure oil recovery pipe (302), the number of the high pressure oil input pipes (301) is one or more, the flow direction in the high pressure oil input pipe (301) is the external pump station (1) to the excavator body (2), the flow direction in the low pressure oil recovery pipe (302) is the excavator body (2) to the external pump station (1), the high pressure oil input pipe (301) is connected to the hydraulic oil inlet (201), and the low pressure oil recovery pipe (302) is connected to the hydraulic oil outlet (202).
4. An excavator with an external pump station according to claim 3, characterized in that the external pump station (1) comprises a power source (101), a booster (102) and a storage tank (103), the output shaft of the power source (101) is connected with the input shaft of the booster (102), the input hole of the booster (102) is connected with the storage tank (103), the output hole of the booster (102) is connected with the high-pressure oil input pipe (301), and the low-pressure oil recovery pipe (302) is connected to the storage tank (103).
5. An excavator with an external pump station according to claim 1, characterized in that the external pump station (1) has a mobile wheel (104) underneath.
6. The excavator with the external pump station according to claim 5, wherein the moving wheel (104) is further provided with a rotation source (1041) and a movement controller (1042), and the movement controller (1042) can drive the rotation source (1041) to output power to drive the moving wheel (104) to rotate, so that the external pump station (1) moves.
7. An excavator with an external pump station according to claim 1, characterized in that the hydraulic oil inlet (201) and the hydraulic oil outlet (202) are on the upper body, the excavator body (2) has a first input switching valve (203) and a first output switching valve (204), the first input switching valve (203) has two inlets, one inlet of the first input switching valve (203) is connected to the hydraulic oil inlet (201) and the other inlet is connected to the outlet of the original on-board hydraulic pump, the first output switching valve (204) has two outlets, one outlet of the first output switching valve (204) is connected to the hydraulic oil outlet (202) and the other outlet is connected to the original on-board hydraulic tank.
8. An excavator with an external pump station according to claim 6, characterized in that the external pump station (1) has an autopilot.
9. An excavator with an external pump station according to claim 6, characterized in that the rotation source (1041) is an electric motor or an internal combustion engine.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006027345A (en) * | 2004-07-13 | 2006-02-02 | Komatsu Ltd | Electric drive type construction machine |
| CN2784385Y (en) * | 2004-12-07 | 2006-05-31 | 张兴营 | Oil and electricity dual-purpose crane for automobiles |
| CN204551581U (en) * | 2015-04-28 | 2015-08-12 | 福建海山机械股份有限公司 | The outer pumping plant formula hydraulic crawler excavator of a kind of machine |
| CN106284473A (en) * | 2016-08-12 | 2017-01-04 | 广西玉柴重工有限公司 | A kind of super low noise explosive-proof hydraulic excavator |
| RU2656938C1 (en) * | 2017-04-04 | 2018-06-07 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Ground vehicle on-board lubrication and hydraulic control systems pumping station |
| CN110932276A (en) * | 2019-12-19 | 2020-03-27 | 三一重机有限公司 | Mobile control device and electric excavator system |
-
2022
- 2022-07-18 CN CN202210843432.3A patent/CN115369946B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006027345A (en) * | 2004-07-13 | 2006-02-02 | Komatsu Ltd | Electric drive type construction machine |
| CN2784385Y (en) * | 2004-12-07 | 2006-05-31 | 张兴营 | Oil and electricity dual-purpose crane for automobiles |
| CN204551581U (en) * | 2015-04-28 | 2015-08-12 | 福建海山机械股份有限公司 | The outer pumping plant formula hydraulic crawler excavator of a kind of machine |
| CN106284473A (en) * | 2016-08-12 | 2017-01-04 | 广西玉柴重工有限公司 | A kind of super low noise explosive-proof hydraulic excavator |
| RU2656938C1 (en) * | 2017-04-04 | 2018-06-07 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Ground vehicle on-board lubrication and hydraulic control systems pumping station |
| CN110932276A (en) * | 2019-12-19 | 2020-03-27 | 三一重机有限公司 | Mobile control device and electric excavator system |
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| CN115369946A (en) | 2022-11-22 |
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