CN106678099B - The power hydraulic system of concrete construction machinery and concrete construction machinery - Google Patents
The power hydraulic system of concrete construction machinery and concrete construction machinery Download PDFInfo
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- CN106678099B CN106678099B CN201710040167.4A CN201710040167A CN106678099B CN 106678099 B CN106678099 B CN 106678099B CN 201710040167 A CN201710040167 A CN 201710040167A CN 106678099 B CN106678099 B CN 106678099B
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- 239000004567 concrete Substances 0.000 title claims abstract description 59
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000005086 pumping Methods 0.000 claims description 127
- 239000011378 shotcrete Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract 3
- 230000009471 action Effects 0.000 description 22
- 238000005507 spraying Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 8
- 230000009977 dual effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of power hydraulic systems of concrete construction machinery and concrete construction machinery, power hydraulic system includes operation power source, work pump group, emergency power supply, emergency pump, hydraulic system of pump, jib hydraulic system, swing hydraulic system and emergency control apparatus, the outlet of emergency pump and hydraulic system of pump, it jib hydraulic system and swings hydraulic system and is connected respectively with to three hydraulic system fuel feeding, and the outlet of emergency pump is connect at least two hydraulic systems in three hydraulic systems by emergency control apparatus, emergency control apparatus can control emergency pump at least two hydraulic systems while fuel feeding, so as to which emergency pump can be to three hydraulic systems while fuel feeding.The system that the present invention can conveniently meet an urgent need under operating mode controls, and improves the working efficiency under emergent operating mode.
Description
Technical Field
The invention relates to the technical field of concrete construction, in particular to a double-power hydraulic system of concrete construction machinery and the concrete construction machinery.
Background
The concrete spraying vehicle is a common concrete construction machine. The concrete guniting vehicle utilizes a concrete pump to mix the premixed mixture with compressed air and an accelerating agent at a nozzle through a delivery pipe, and the mixture is sprayed to a sprayed surface at a high speed to form a concrete supporting layer. The concrete guniting vehicle is widely applied to the fields of tunnels, underground powerhouses, subway engineering, rock engineering, military underground engineering, highway engineering and the like.
The main working system of the concrete guniting vehicle comprises a pumping hydraulic system, an arm support hydraulic system and a swinging hydraulic system. The pumping hydraulic system is responsible for pumping action of concrete, and suction and discharge of the concrete are realized by controlling reciprocating motion of the two concrete conveying cylinders and matching of the swing hydraulic system. The swing hydraulic system controls the action of a corresponding actuating mechanism (such as a swing cylinder of an S valve), and the concrete pumping process is completed through the cooperation with the pumping hydraulic system. The boom hydraulic system controls the actions of the variable-amplitude oil cylinder and the telescopic oil cylinder of each section of boom of the boom, and realizes the functions of moving, rotating and telescoping the boom so as to spray concrete to a preset position.
In order to provide power for each hydraulic system of the concrete spraying vehicle, the power system of the concrete spraying vehicle generally comprises a working power system and an emergency power system.
The work power system comprises a work power source and a work pump set in driving connection with the work power source. The working power source is generally an electric motor externally connected with 380V power electricity. Under normal conditions, the concrete guniting vehicle provides power for each hydraulic system by means of the work power system, and normal work of each hydraulic system is achieved.
The emergency power system comprises an emergency power source and an emergency pump set or an emergency pump which is in driving connection with the emergency power source. The emergency power source is generally an engine. In some cases, the emergency power system is required to provide working power for each hydraulic system to complete the concrete spraying work of the concrete spraying vehicle, such as: when the power electricity is not connected or the working pump set cannot work, the arm support can be opened or retracted through the emergency power system; under the conditions of sudden power failure and the like, the emergency power system is started to perform pumping, swinging and other work so as to finish pumping or cleaning of concrete in the pipeline, and finish actions such as withdrawing the arm support; 380V power electricity exists in a working site inside the tunnel, but due to construction procedures or time, the vehicle needs to be cleaned outside the tunnel, and when no power electricity exists outside the tunnel, the vehicle can be cleaned by using an emergency power system.
When the emergency power system is started, the concrete spraying vehicle enters an emergency working condition. Under emergency conditions, all actions of a pumping hydraulic system, an arm support hydraulic system and a swing hydraulic system are generally required to be still realized so as to realize the functions of withdrawing the arm support, cleaning concrete in a conveying pipe and a conveying cylinder barrel and the like. Of course, under emergency conditions, the speed or time of each hydraulic system is not required to be as slow as that during normal operation.
In the prior art, a concrete spraying vehicle mainly comprises three different forms of double-power hydraulic systems.
Fig. 1 shows a first dual-power hydraulic system of the prior art. As shown in FIG. 1, the dual power hydraulic system has a work power system and an emergency power system. The work-power system includes a work-pump group 20 and an electric motor 30 as a work-power source, and the work-pump group 20 is driven by the electric motor 30. The emergency power system comprises an emergency pump unit 40 and an engine 50 as an emergency power source, wherein the emergency pump unit 40 is driven by the engine 50.
The working pump group 20 includes three working pumps: the system comprises a pumping working pump 21 for supplying oil to a pumping hydraulic system 60 for controlling the pumping of the concrete, an arm support working pump 22 for supplying oil to an arm support hydraulic system for controlling the action of an arm support, and a swinging working pump 23 for supplying oil to a swinging hydraulic system 80 for controlling the swinging of a swinging cylinder of an S valve.
The emergency pump group 40 comprises three emergency pumps: a pumping emergency pump 41 connected with the pumping hydraulic system 60, a boom emergency pump 42 connected with the boom hydraulic system, and a swing emergency pump 43 connected with the swing hydraulic system 80.
In the first dual-power hydraulic system, each working pump in the working pump group 20 and each emergency pump in the emergency pump group 40 are correspondingly arranged, and the working pump group 20 and the emergency pump group 40 are connected in parallel, so that the working pumps and the emergency pumps corresponding to the two sets of power systems are connected with the same hydraulic system. As shown in fig. 1, the outlet of the pumping work pump 21 and the outlet of the pumping emergency pump 41 are both connected to a pumping hydraulic system 60; the outlet of the boom working pump 22 and the outlet of the boom emergency pump 42 are both connected with a boom hydraulic system, specifically, connected with a pressure oil port P of an electric proportional multi-way valve 70 of the boom hydraulic system; the outlet of the oscillating working pump 23 and the outlet of the oscillating emergency pump 43 are both connected to an oscillating hydraulic system 80.
The electric proportional multi-way valve 70 includes a plurality of boom control units, and each boom control unit controls an actuator (e.g., a hydraulic cylinder) for controlling the boom to move. Each arm support control joint comprises two working ports, and the two working ports are respectively connected with the two working ports of the execution element. And if one working port of the arm support control joint is fed with oil, the other working port is fed with oil. As shown in fig. 1, two work ports a1 and B1 of the first boom control link and two work ports a2 and B2 of the second boom control link are indicated. The number of the arm support control links can be determined according to the number of the executing elements for controlling the arm support action.
Fig. 2 shows a second type of prior art dual power hydraulic system. As shown in fig. 2, compared with the first dual-power hydraulic system, the emergency power includes an emergency pump 40 and a single pump, and the emergency pump 40 is connected to the pressure port P of the electric proportional multi-way valve 70 of the boom hydraulic system, but not connected to the pumping hydraulic system 60 and the swing hydraulic system 80.
Fig. 3 shows a third dual power hydraulic system of the prior art. As shown in fig. 3, the difference between the third dual-power hydraulic system and the first dual-power hydraulic system is that the emergency power includes an emergency pump 40 and a single pump, and the outlet of the emergency pump 40 is connected to the pumping hydraulic system 60, the boom hydraulic system and the swing hydraulic system 80 through a multi-way valve 90 and a three-position four-way reversing valve 100 for controlling the lower vehicle leg. When the three-position four-way reversing valve 100 is positioned at the middle position, the outlet of the emergency pump 40 is communicated with the pumping hydraulic system 60 and is disconnected with the boom hydraulic system and the swing hydraulic system 80; when the emergency pump 40 is in the left position, the outlet of the emergency pump is communicated with the swing hydraulic system 80 and disconnected with the pumping hydraulic system 60 and the boom hydraulic system; in the right position, the outlet of the emergency pump 40 is in communication with the boom hydraulic system and the pumping hydraulic system 60, and is disconnected from the pumping hydraulic system 60 and the swing hydraulic system 80.
In the process of implementing the present invention, designers find that the above prior art has the following disadvantages:
in the first double-power hydraulic system, the emergency pump set driven by the engine can realize all functions of the working pump set, but the layout occupies a large space and has high cost.
In the second double-power hydraulic system, only the arm support action can be realized, and pumping and swinging actions cannot be realized. If the power is cut off suddenly, the concrete in the conveying pipe cannot be ejected and can only be cleaned manually.
In the third dual-power hydraulic system, the arm support, the pumping and the swinging can be realized by a single pump, but the three systems cannot work simultaneously, particularly the pumping and the swinging cannot be carried out simultaneously, and when the system is used under an emergency working condition, the system needs to be switched back and forth, the control process is complicated, and the consumed time is long.
Disclosure of Invention
The invention aims to provide a double-power hydraulic system of concrete construction machinery and the concrete construction machinery, and aims to realize simultaneous work of a pumping hydraulic system, an arm support hydraulic system and a swing hydraulic system of the concrete construction machinery by using a single pump as an emergency pump, so that the system control under emergency working conditions is facilitated, and the working efficiency under the emergency working conditions is improved.
The invention provides a dual-power hydraulic system of concrete construction machinery, which comprises a working power source, a working pump set, an emergency power source, an emergency pump, a pumping hydraulic system, an arm support hydraulic system, a swing hydraulic system and an emergency control device, wherein the working power source is in driving connection with the working pump set, the working pump set is respectively connected with the pumping hydraulic system, the arm support hydraulic system and the swing hydraulic system to supply oil to the three hydraulic systems, the emergency power source is in driving connection with the emergency pump, an outlet of the emergency pump is respectively connected with the pumping hydraulic system, the arm support hydraulic system and the swing hydraulic system to supply oil to the three hydraulic systems, an outlet of the emergency pump is connected with at least two hydraulic systems in the three hydraulic systems through the emergency control device, and the emergency control device can control the emergency pump to simultaneously supply oil to the at least two hydraulic systems, so that the emergency pump can supply oil to the three hydraulic systems simultaneously.
Further, the dual-power hydraulic system comprises an electric proportional multi-way valve, the boom hydraulic system comprises a plurality of boom control links of the electric proportional multi-way valve, the working pump group comprises a boom working pump, an outlet of the boom working pump and an outlet of the emergency pump are both connected with a pressure oil port of the electric proportional multi-way valve, the emergency control device comprises a pumping emergency control element for independently controlling the opening degree and a swing emergency control element for independently controlling the opening degree, and the pumping emergency control element is connected between the outlet of the emergency pump and the pumping hydraulic system and used for controlling the flow from the outlet of the emergency pump to the pumping hydraulic system; the swing emergency control element is connected between an outlet of the emergency pump and the swing hydraulic system and used for controlling the flow from the outlet of the emergency pump to the swing hydraulic system.
Further, the pumping emergency control element comprises an independently arranged pumping emergency control valve; and/or the swing emergency control element comprises an independently arranged swing emergency control valve.
Further, the pumping emergency control element comprises a pumping emergency control unit of the electric proportional multi-way valve, and the pumping emergency control unit comprises a pumping system working port connected with the pumping hydraulic system; and/or the swing emergency control element comprises a swing emergency control unit of the electric proportional multi-way valve, and the swing emergency control unit comprises a swing system working port connected with the swing hydraulic system.
Furthermore, the valve plate structures of the pumping emergency control link and the arm support control link of the electric proportional multi-way valve are the same and are arranged in parallel; and/or the swing emergency control joint and the valve plate of the arm support control joint of the electric proportional multi-way valve are identical in structure and are arranged in parallel.
Furthermore, the dual-power hydraulic system further comprises a get-off hydraulic system, wherein the pumping emergency control unit further comprises a get-off system working port connected with the get-off hydraulic system; or the swing emergency control union also comprises a get-off system working opening connected with the get-off hydraulic system.
Further, the working pump group comprises a pumping working pump, and an outlet of the pumping working pump is communicated with the pumping hydraulic system in a single direction; and/or the working pump group comprises an arm support working pump, and an outlet of the arm support working pump is communicated with the arm support hydraulic system in a one-way mode; and/or the working pump group comprises a swing working pump, and an outlet of the swing working pump is communicated with the swing hydraulic system in a single direction; and/or the outlet of the emergency pump is communicated with the boom hydraulic system in a one-way; and/or the outlet of the emergency pump is communicated with the pumping hydraulic system in a single direction; and/or the outlet of the emergency pump is communicated with the swing hydraulic system in a single direction.
Further, the working port of the pumping system is communicated with the pumping hydraulic system in a one-way mode; and/or the working port of the swing system is communicated with the swing hydraulic system in a one-way mode.
In a second aspect, the present invention provides a concrete construction machine including the dual power hydraulic system according to any one of the first aspect of the present invention.
Further, the concrete construction machine is a concrete guniting vehicle.
Based on the dual-power hydraulic system of the concrete construction machine and the concrete construction machine, provided by the invention, the outlet of the emergency pump is respectively connected with the pumping hydraulic system, the boom hydraulic system and the swing hydraulic system to supply oil to the three hydraulic systems, and the emergency pump can simultaneously supply oil to the three hydraulic systems under the control of the emergency control device, so that the pumping hydraulic system, the boom hydraulic system and the swing hydraulic system of the concrete construction machine can simultaneously work by utilizing one single pump of the emergency pump. The emergency pump is provided with a single pump as the emergency pump, so that the system control under the emergency working condition is facilitated, and the working efficiency under the emergency working condition is improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic diagram of a first dual-power hydraulic system in the prior art.
Fig. 2 is a schematic diagram of a second dual-power hydraulic system in the prior art.
Fig. 3 is a schematic diagram of a third dual-power hydraulic system in the prior art.
Fig. 4 is a schematic diagram of a dual power hydraulic system according to an embodiment of the present invention.
In fig. 1 to 4, each reference numeral represents:
10. the hydraulic system comprises an oil tank, 20, a working pump group, 21, a pumping working pump, 22, a boom working pump, 23, a swinging working pump, 30, a motor, 40, an emergency pump group or an emergency pump, 41, a pumping emergency pump, 42, a boom emergency pump, 43, a swinging emergency pump, 50, an engine, 60, a pumping hydraulic system, 70, an electric proportional multi-way valve, 80, a swinging hydraulic system, 90, a multi-way valve, 100, a three-position four-way reversing valve, 101, a first one-way valve, 102, a second one-way valve, 103, a third one-way valve, 104, a fourth one-way valve, 105, a fifth one-way valve, 106, a sixth one-way valve, 110, an electric proportional multi-way valve, 111, a swinging emergency control unit, 112, a pumping emergency control unit, 120 and a get-off hydraulic system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.
Fig. 4 is a schematic diagram of a dual power hydraulic system according to an embodiment of the present invention. In this embodiment, the dual-power hydraulic system is a dual-power hydraulic system of a concrete spraying vehicle. The present invention is not limited to concrete spraying vehicles, but may be other types of concrete working machines, for example.
As shown in fig. 4, the dual power hydraulic system includes a working power source, a working pump set 20, an emergency power source, an emergency pump 40, a pumping hydraulic system 60, a boom hydraulic system, a swing hydraulic system 80, and an emergency control device. The work power source is drivingly connected to the work pump package 20. The work pump group 20 is connected to the pumping hydraulic system 60, the boom hydraulic system, and the swing hydraulic system 80, respectively, to supply oil to the three hydraulic systems. The emergency power source is in driving connection with the emergency pump 40. The outlet of the emergency pump 40 is connected to the pumping hydraulic system 60, the boom hydraulic system and the swing hydraulic system 80, respectively, to supply oil to the three hydraulic systems. Wherein, the export of emergency pump 40 passes through emergency control device with two at least hydraulic system among the three hydraulic system and is connected, and emergency control device can control emergency pump 40 and supply oil simultaneously to two at least hydraulic system to emergency pump 40 can supply oil simultaneously to three hydraulic system.
Because the outlet of the emergency pump 40 in the dual-power hydraulic system is respectively connected with the pumping hydraulic system 60, the boom hydraulic system and the swing hydraulic system 80 to supply oil to the three hydraulic systems, and the emergency pump 40 can supply oil to the three hydraulic systems simultaneously under the control of the emergency control device, the pumping hydraulic system, the boom hydraulic system and the swing hydraulic system of the concrete construction machine can work simultaneously by using one single pump of the emergency pump. The emergency pump is provided with a single pump as the emergency pump, so that the system control under the emergency working condition is facilitated, and the working efficiency under the emergency working condition is improved.
In this embodiment, the working power source is the electric motor 30, and the emergency power source is the engine 50.
Preferably, the outlet of the emergency pump 40 is directly connected to one of the three hydraulic systems, and the outlet of the emergency pump 40 is connected to the other two of the three hydraulic systems through an emergency control device capable of controlling the emergency pump 40 to supply oil to the other two hydraulic systems simultaneously. The arrangement can realize that one single pump finishes the simultaneous work of the pumping hydraulic system, the boom hydraulic system and the swing hydraulic system of the concrete construction machine under the emergency working condition in a simple control structure and a control mode.
In this embodiment, the outlet of the emergency pump 40 is directly connected to the boom hydraulic system, and is connected to the pumping hydraulic system 60 and the swing hydraulic system 80 through an emergency control device.
As shown in fig. 4, the dual-power hydraulic system includes an electric proportional multi-way valve 110, the boom hydraulic system includes a plurality of boom control units of the electric proportional multi-way valve 110, the working pump group 20 includes a boom working pump 22, and an outlet of the boom working pump 22 and an outlet of the emergency pump 40 are both connected to a pressure oil port P of the electric proportional multi-way valve 110. The emergency control device comprises a pumping emergency control element and a swinging emergency control element, wherein the opening degrees of the pumping emergency control element and the swinging emergency control element are independently controlled. The pumping emergency control element is connected between the outlet of the emergency pump 40 and the pumping hydraulic system 60 for controlling the flow between the outlet of the emergency pump 40 to the pumping hydraulic system 60. The swing emergency control element is connected between the outlet of the emergency pump 40 and the swing hydraulic system 80 for controlling the flow between the outlet of the emergency pump 40 to the swing hydraulic system 80.
The electric proportional multi-way valve 110 is a load-sensitive electric proportional multi-way valve, and is integrated by a plurality of sheet-type working links.
The electric proportional multi-way valve 110 includes a plurality of boom control units, and each boom control unit controls an actuator (e.g., a hydraulic cylinder) for controlling the boom to move. As shown in fig. 4, each arm support control link includes two working ports, i.e., an oil port a and an oil port B, and the two working ports are respectively connected with the two working ports of the actuator. And if one working port of the arm support control joint is fed with oil, the other working port is fed with oil. The number of boom control links may be determined according to the number of actuators controlling the boom motion, and the number may be represented by a positive integer n greater than or equal to 1. In this embodiment, the two working oil ports of the first boom control link are labeled as a1 and B1, the two working oil ports of the second boom control link are labeled as a2 and B2, and so on. Each arm support control link is correspondingly provided with an electric control end or a manual control handle, and the valve core corresponding to the corresponding arm support control link can be positioned at a corresponding position through the electric control or manual control handle, so that the independent action of each arm support control link is realized, and the independent action of each actuating mechanism or the compound action of a plurality of actuating mechanisms in the actuating mechanisms for controlling the arm support action can be realized.
As shown in fig. 4, two working ports of the port a1 and the port B1 of the first boom control linkage and two working ports of the port a2 and the port B2 of the second boom control linkage are marked therein, and the rest boom control linkages (if any) are not shown.
In this embodiment, the electric proportional multi-way valve 70 further includes a swing emergency control unit 111 and a pumping emergency control unit 112. The swing emergency control union 111 and the pumping emergency control union 112 are both connected with the pressure oil port P. In this embodiment, the pumping emergency control element includes a pumping emergency control unit 112 of the electric proportional multi-way valve 110. The pumping emergency control sub 112 includes a pumping system port An +2 connected to the pumping hydraulic system 60. The swing emergency control element includes a swing emergency control section 111 of the electric proportional multi-way valve 110. The pumping emergency control block 111 includes a swing system port Bn +1 connected to the swing hydraulic system 80. The arrangement ensures that the hydraulic elements of the dual-power hydraulic system are few, and the layout space occupies little space.
More preferably, the valve plates of the pumping emergency control unit and the arm support control units of the electric proportional multi-way valve 70 have the same structure and are arranged in parallel. The valve plates of the swing emergency control unit and the arm support control units of the electric proportional multi-way valve 70 have the same structure and are arranged in parallel. The arrangement makes the structure and control of the electric proportional multi-way valve 110 simpler, and also makes the double-power hydraulic system compact in structure, simple in pipeline arrangement and not easy to make mistakes.
The electric proportional multi-way valve 110 is used for controlling the boom action under the normal operation condition and the emergency condition, and is also used for controlling the pumping action and the swinging action under the emergency condition. The n arm support control couples are used for controlling the action of cantilever crane among them. The other two controls are used for controlling the pumping action and the swinging action under the emergency working condition.
In one embodiment, not shown, the pumping emergency control element comprises an independently provided pumping emergency control valve. The swing emergency control element includes an independently disposed swing emergency control valve. Of course, it is also possible to integrate only one valve plate of the swing emergency control unit 111 and the pumping emergency control unit 112 on the electric proportional multi-way valve 110, and the function of the other valve plate is realized by an independently arranged emergency control valve.
As shown in fig. 4, in this embodiment, the dual-power hydraulic system further includes a get-off hydraulic system 120, wherein the working port Bn +2 of the pumping emergency control unit 112 is connected to the get-off hydraulic system 120 as a working port of the get-off system.
The working port An +1 of the swing emergency control unit 111 can also be connected with the hydraulic system 120 for getting off as a working port of the system for getting off.
Because the movement of the hydraulic system of the lower vehicle is generally different from the movement of the boom hydraulic system, the pumping hydraulic system and the swing hydraulic system, the surplus oil port of the swing emergency control unit 111 or the pumping emergency control unit 112 can be used as the working port of the hydraulic system of the lower vehicle for supplying oil to the hydraulic system of the lower vehicle under normal working and emergency working conditions, and the guniting or cleaning work under the emergency working condition cannot be influenced.
Of course, the specific positions of the swing emergency control link 111 and the pumping emergency control link 112 in the electric proportional multi-way valve 110 in each control link of the electric proportional multi-way valve are not limited, and may be, for example, in front of all boom control links, between two boom control links, or behind all boom control links. In addition, the swing emergency control link 111 and the pumping emergency control link 112 may be disposed adjacently, and other control links may be spaced therebetween. In addition, the working ports of the swing emergency control unit 111 and the pumping emergency control unit 112 connected to the corresponding hydraulic systems are also not limited, for example, for the swing emergency control unit 111, the flow output from the port a to the swing hydraulic system 80 may be, or the flow output from the port B to the swing hydraulic system 80 may be.
As shown in fig. 4, the working-pump group 20 includes a pumping working pump 21, a boom working pump 22, and a swing working pump 23. The working-pump group 20 includes the above-described working pumps but is not limited thereto.
As shown in fig. 4, the outlet of the pump work pump 21 is in one-way communication with the pumping hydraulic system 60. In this embodiment, the outlet of the pump work pump 21 is connected to the inlet of the first check valve 101, and the outlet of the first check valve 101 is connected to the pumping hydraulic system 60. The flow rate of the pump working pump 21 is large, and a cartridge type cover valve may be used in place of the first check valve 101 in consideration of pressure loss.
The outlet of the boom working pump 22 is in one-way communication with the boom hydraulic system. In this embodiment, an outlet of the boom working pump 22 is connected to an inlet of the second check valve 102, and an outlet of the second check valve 102 is connected to the boom hydraulic system. The boom work pump 22 has a large flow rate, and a cartridge type cover valve may be used instead of the second check valve 102 in consideration of pressure loss.
The outlet of the oscillating working pump 23 is in one-way communication with the oscillating hydraulic system 80. In this embodiment, the outlet of the oscillating work pump 23 is connected to the inlet of the third check valve 103, and the inlet of the third check valve 103 is connected to the oscillating hydraulic system 80.
The outlet of the emergency pump 40 is communicated to the boom hydraulic system in a single direction. In this embodiment, the outlet of the emergency pump 40 is connected to the inlet of the fourth check valve 104, and the outlet of the fourth check valve is connected to the pressure port P of the electro-proportional multi-way valve 110.
The outlet of the emergency pump 40 is in one-way communication with the pumping hydraulic system 60. In this embodiment, the pumping system working port An +2 is connected to the pumping hydraulic system 60 through the fifth check valve 105, so as to realize the one-way communication from the pumping system working port An +2 to the pumping hydraulic system 60.
The outlet of the emergency pump 40 is in one-way communication with the swing hydraulic system 80. In this embodiment, the swing system working port Bn +1 is connected to the swing hydraulic system 80 through the sixth check valve 106 to realize the one-way communication from the swing system working port Bn +1 to the swing hydraulic system 80.
The above arrangement of one-way conduction of the outlet of each pump to the corresponding hydraulic system can prevent oil flow of each hydraulic system from flowing back, and can also prevent oil flow of the working pump set 20 and the emergency pump 40 from communicating with each other. For example, during normal operation, the engine 50 does not operate, the emergency pump 40 does not produce oil, and the fourth check valve 104 at the outlet of the emergency pump 40 can prevent high-pressure oil of the boom operation pump 22 from entering the emergency pump 40; the An +2 port of the pumping emergency control unit 112 of the electric proportional multi-way valve 110 does not discharge oil, and the fifth check valve 105 can prevent high-pressure oil of the pumping working pump 21 from entering the electric proportional multi-way valve 110; the Bn +1 port of the swing emergency control union 111 of the electric proportional multi-way valve 110 does not discharge oil, and the sixth check valve 106 can prevent high-pressure oil of the swing working pump 23 from entering the electric proportional multi-way valve 110.
When the concrete guniting vehicle normally works, the motor 30 drives the working pump group 20, and the pumping working pump 21, the boom working pump 22 and the swing working pump 23 respectively supply oil to the correspondingly connected hydraulic systems, so that the actions of the pumping hydraulic system 60, the boom hydraulic system and the swing hydraulic system 80 are realized. The engine 50 and the emergency pump 40 are not operated at this time.
When the working pump group 20 cannot work normally, the engine 50 drives the emergency pump 40 to work, and after high-pressure oil at the outlet of the emergency pump 40 enters the electric proportional multi-way valve 110, oil outlet of a corresponding oil port is realized by controlling valve cores of the n boom control units, the pumping emergency control unit 112 and the swing hydraulic control unit 111. Therefore, the emergency pump 40 supplies oil to the boom hydraulic system, the pumping hydraulic system 60 and the swing hydraulic system 80 through the n boom control units, the pumping emergency control unit 112 and the swing hydraulic control unit 111 of the electric proportional multi-way valve 110, so as to realize simultaneous boom, pumping and swinging actions.
Under the emergency working condition that the emergency dynamic pump 40 is started, the pumping hydraulic system 60, the arm support hydraulic system and the swinging hydraulic system 80 of the concrete spraying vehicle can work cooperatively through the operation of a remote controller, and the concrete spraying or pipeline cleaning is completed.
The invention also provides a concrete construction machine which comprises the double-power hydraulic system. The concrete working machine is, for example, a concrete shotcrete car.
The embodiment utilizes the single pump of the emergency pump to realize the simultaneous work of the pumping hydraulic system, the boom hydraulic system and the swing hydraulic system of the concrete construction machine, and on the basis of arranging the single pump as the emergency pump, the system control under the emergency working condition is facilitated, and the working efficiency under the emergency working condition is improved. Furthermore, one emergency pump is matched and integrated with two control couplings on the electric proportional multi-way valve comprising a plurality of arm support control couplings, so that the existing control system can be effectively utilized, and the simultaneous action of a pumping hydraulic system, an arm support hydraulic system and a swinging hydraulic system under the emergency working condition can be realized by a simple structure. The dual-power hydraulic system of the embodiment also has the advantages of few hydraulic elements, small occupied layout space, low cost, stable and reliable work and capability of meeting requirements.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A dual-power hydraulic system of concrete construction machinery comprises a working power source, a working pump group (20), an emergency power source, an emergency pump (40), a pumping hydraulic system (60), an arm support hydraulic system, a swing hydraulic system (80) and an emergency control device, wherein the working power source is in driving connection with the working pump group (20), the working pump group (20) is respectively connected with the pumping hydraulic system (60), the arm support hydraulic system and the swing hydraulic system (80) to supply oil to the three hydraulic systems, the emergency power source is in driving connection with the emergency pump (40), and is characterized in that an outlet of the emergency pump (40) is respectively connected with the pumping hydraulic system (60), the arm support hydraulic system and the swing hydraulic system (80) to supply oil to the three hydraulic systems, and outlets of the emergency pump (40) are connected with at least two hydraulic systems of the three hydraulic systems through the emergency control device, the emergency control device is capable of controlling the emergency pump (40) to supply oil to the at least two hydraulic systems simultaneously, so that the emergency pump (40) is capable of supplying oil to the three hydraulic systems simultaneously.
2. The dual-power hydraulic system of claim 1, wherein the dual-power hydraulic system comprises an electric proportional multi-way valve (110), the boom hydraulic system comprises a plurality of boom control links of the electric proportional multi-way valve (110), the working pump set (20) comprises a boom working pump (22), an outlet of the boom working pump (22) and an outlet of the emergency pump (40) are both connected with a pressure oil port (P) of the electric proportional multi-way valve (110), the emergency control device comprises a pumping emergency control element for independently controlling the opening degree and a swinging emergency control element for independently controlling the opening degree, wherein,
the pumping emergency control element is connected between the outlet of the emergency pump (40) and the pumping hydraulic system (60) and is used for controlling the flow of the outlet of the emergency pump (40) to the pumping hydraulic system (60);
the swing emergency control element is connected between an outlet of the emergency pump (40) and the swing hydraulic system (80) and is used for controlling the flow from the outlet of the emergency pump (40) to the swing hydraulic system (80).
3. The dual-power hydraulic system of claim 2,
the pumping emergency control element comprises an independently arranged pumping emergency control valve; and/or the presence of a gas in the gas,
the swing emergency control element comprises an independently arranged swing emergency control valve.
4. The dual-power hydraulic system of claim 2,
the pumping emergency control element comprises a pumping emergency control unit (112) of the electric proportional multi-way valve (110), and the pumping emergency control unit (112) comprises a pumping system working port (An +2) connected with the pumping hydraulic system (60); and/or the presence of a gas in the gas,
the swing emergency control element comprises a swing emergency control union (111) of the electric proportional multi-way valve (110), and the swing emergency control union (111) comprises a swing system working port (Bn +1) connected with the swing hydraulic system (80).
5. The dual-power hydraulic system of claim 4,
the pumping emergency control link and a valve plate of an arm support control link of the electric proportional multi-way valve (110) have the same structure and are arranged in parallel; and/or the presence of a gas in the gas,
the swing emergency control unit and the valve plate of the arm support control unit of the electric proportional multi-way valve (110) are identical in structure and are arranged in parallel.
6. The hybrid hydraulic system of claim 5, further comprising a drop-off hydraulic system (120), wherein,
the pumping emergency control unit (112) further comprises a get-off system working port (Bn +2) connected with the get-off hydraulic system (120); or,
the swing emergency control unit (111) further comprises a get-off system working opening connected with the get-off hydraulic system (120).
7. The hybrid hydraulic system according to any one of claims 1 to 6,
the working pump group (20) comprises a pumping working pump (21), and an outlet of the pumping working pump (21) is communicated with the pumping hydraulic system (60) in a single direction; and/or the presence of a gas in the gas,
the working pump group (20) comprises an arm support working pump (22), and an outlet of the arm support working pump (22) is communicated with the arm support hydraulic system in a one-way mode; and/or the presence of a gas in the gas,
the work pump group (20) comprises a swing work pump (23), and an outlet of the swing work pump (23) is communicated with the swing hydraulic system (80) in a single direction; and/or the presence of a gas in the gas,
an outlet of the emergency pump (40) is communicated with the boom hydraulic system in a one-way mode; and/or the presence of a gas in the gas,
the outlet of the emergency pump (40) is communicated to the pumping hydraulic system (60) in a single direction; and/or the presence of a gas in the gas,
the outlet of the emergency pump (40) is communicated to the swing hydraulic system (80) in a single direction.
8. The hybrid hydraulic system according to any one of claims 4 to 6,
the pumping system working port (An +2) is communicated with the pumping hydraulic system (60) in a single direction; and/or the presence of a gas in the gas,
and the swing system working port (Bn +1) is communicated with the swing hydraulic system (80) in a single direction.
9. Concrete working machine, characterized in that it comprises a dual-power hydraulic system according to any one of claims 1 to 8.
10. The concrete working machine of claim 9, wherein the concrete working machine is a concrete shotcrete vehicle.
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| CN217708618U (en) * | 2022-06-29 | 2022-11-01 | 三一汽车起重机械有限公司 | Hydraulic power system and working machine |
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Denomination of invention: Double power hydraulic system of concrete construction machinery and concrete construction machinery Effective date of registration: 20210802 Granted publication date: 20180622 Pledgee: Industrial and Commercial Bank of China Limited Xuzhou Branch Pledgor: XUZHOU XCMG SCHWING MACHINERY Co.,Ltd. Registration number: Y2021320000152 |
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Date of cancellation: 20211227 Granted publication date: 20180622 Pledgee: Industrial and Commercial Bank of China Limited Xuzhou Branch Pledgor: XUZHOU XCMG SCHWING MACHINERY Co.,Ltd. Registration number: Y2021320000152 |