CN110725821A - Distribution hydraulic system and concrete distribution equipment - Google Patents
Distribution hydraulic system and concrete distribution equipment Download PDFInfo
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- CN110725821A CN110725821A CN201910911677.3A CN201910911677A CN110725821A CN 110725821 A CN110725821 A CN 110725821A CN 201910911677 A CN201910911677 A CN 201910911677A CN 110725821 A CN110725821 A CN 110725821A
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to concrete conveying equipment, and discloses a distribution hydraulic system which comprises a distribution system (1), a working hydraulic system (2), a first oil pump (3) and a second oil pump (4), wherein the first oil pump (3) is connected with the distribution system (1) through an emergency valve bank (5), and the second oil pump (4) is respectively connected with the distribution system (1) and the working hydraulic system (2) through the emergency valve bank (5) so as to selectively supply oil to the distribution system (1) or the working hydraulic system (2) through the emergency valve bank (5). The invention also discloses concrete distributing equipment. The invention can effectively ensure continuous concrete pumping operation.
Description
Technical Field
The invention relates to concrete conveying equipment, in particular to a distribution hydraulic system, and in addition, relates to concrete distribution equipment.
Background
In modern engineering construction, a large number of concrete pump trucks are used for conveying concrete. The concrete pump truck is construction equipment for conveying concrete through a pumping mechanism, and a hydraulic system of the concrete pump truck generally comprises four independent systems, namely a pumping hydraulic system, an arm frame hydraulic system, a distribution valve hydraulic system and a stirring hydraulic system. The hydraulic system of the concrete pump truck generally comprises a pumping hydraulic system, an arm support hydraulic system, a distribution hydraulic system and a stirring hydraulic system. The pumping hydraulic system drives the pumping oil cylinders and the distribution hydraulic system drives the S-shaped pipe valve, the boom hydraulic system drives the boom to enable the conveying pipe at the tail end of the boom to move to a specified position, the stirring hydraulic system drives the stirring blades to stir concrete, the two pumping oil cylinders move back and forth when the concrete is pumped, the concrete piston is driven to realize the suction and the discharge of the concrete, and the S-shaped pipe valve is driven to reverse through the distribution hydraulic system, so that the concrete cylinders are connected with the hopper or the concrete pipeline, and the conveying of the concrete is realized.
The pumping hydraulic system, the distribution hydraulic system and the arm support hydraulic system are respectively composed of three independent oil pumps: the main pump, the distribution pump and the arm support pump provide pressure oil.
The distribution hydraulic system has the characteristics of large reversing pressure impact, high reversing frequency (20-30 times per minute) and the like, and the fault rate of an oil pump of the distribution hydraulic system is high in actual work. When an oil pump of a hydraulic system of the distribution valve fails, the S pipe cannot swing, the distribution valve cannot complete swing reversing, and the concrete pump truck cannot continue to pump concrete.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a distribution hydraulic system, which can effectively solve the problem that the distribution hydraulic pump fails to pump concrete continuously, and improve the continuous operation performance of the distribution hydraulic system.
The invention further aims to provide concrete distribution equipment which has better continuous operation performance.
In order to achieve the above object, a first aspect of the present invention provides a distribution hydraulic system, including a distribution system, a working hydraulic system, a first oil pump and a second oil pump, wherein the first oil pump is connected to the distribution system through an emergency valve set, and the second oil pump is respectively connected to the distribution system and the working hydraulic system through the emergency valve set, so as to be able to selectively supply oil to the distribution system or the working hydraulic system through the emergency valve set.
Preferably, the emergency valve group comprises a reversing valve, and the reversing valve comprises a first oil port connected with the first oil pump, a second oil port connected with the distribution system, a third oil port connected with the second oil pump, and a fourth oil port connected with the working hydraulic system; and the reversing valve can selectively enable the third oil port of the reversing valve to be communicated with the second oil port or the fourth oil port of the reversing valve.
Further, the switching-over valve is the rotary type switching-over valve, the rotary type switching-over valve includes down the piece and installs last piece on the piece down, first hydraulic fluid port, second hydraulic fluid port, third hydraulic fluid port and fourth hydraulic fluid port all set up on the piece down, be equipped with four blind holes of two liang of intercommunications on the piece to four blind holes that can pass through this last piece make the second hydraulic fluid port selectively with first hydraulic fluid port or third hydraulic fluid port intercommunication.
Preferably, the emergency valve group is communicated with the distribution system in a one-way mode, so that hydraulic oil can be led into the distribution system in a one-way mode.
Specifically, a check valve is connected between the emergency valve group and the distribution system.
Preferably, a multi-way valve is connected between the second oil pump and the emergency valve bank.
Typically, the emergency valve block further comprises an oil return port connected with the oil tank. Specifically, a filter is connected between the oil return port and the oil tank.
More preferably, the working hydraulic system is at least one of a concrete distribution equipment support leg system, a vibration damping system and one working oil way of a boom system.
In a second aspect, the invention provides a concrete distribution apparatus comprising a distribution hydraulic system according to any one of the above-mentioned aspects of the first aspect.
Through the technical scheme, the distribution hydraulic system is provided with the emergency valve group between the distribution system and the first oil pump and between the working hydraulic system and the second oil pump in a targeted manner, when the first oil pump breaks down, the second oil pump can provide hydraulic oil for the distribution system by switching the emergency valve group, so that the continuous operation of the distribution hydraulic system is effectively guaranteed, and the loss is reduced.
In addition, the first oil pump is connected with the oil tank, so that oil leakage or system pollution of the first oil pump can be effectively prevented.
Furthermore, the hydraulic distribution system provided by the invention designs the rotary reversing valve, the rotary reversing valve enables the blind hole in the upper block to be selectively communicated with the oil port in the lower block by rotating the upper block on the rotary reversing valve, the switching of an external oil circuit is realized, and the rotary reversing valve is simple and reliable in structure.
And the working hydraulic oil path selects at least one of a working oil path, a supporting leg system and a vibration damping system of the boom system of the concrete distribution equipment, so that the boom system, the pumping system and the distribution system can work normally.
Further advantages of the invention, as well as advantages of preferred embodiments, are further described in the detailed description which follows.
Drawings
FIG. 1 is a hydraulic schematic of the distributed hydraulic system of the present invention during normal operation;
FIG. 2 is a hydraulic schematic of the distributed hydraulic system of the present invention in an emergency operating condition;
FIG. 3 is one of the structural schematic diagrams of the rotary diverter valve of the present invention;
FIG. 4 is a second schematic structural view of the rotary diverter valve of the present invention;
FIG. 5 is a schematic view of the construction of the lower block of the rotary reversing valve of the present invention;
FIG. 6 is a schematic illustration of the position of the upper block during normal operation of the hydraulic distribution system of the present invention;
FIG. 7 is a schematic view of the communication relationship between the blind hole of the upper block and the oil port of the lower block in the normal working state of the hydraulic distribution system of the present invention;
FIG. 8 is a schematic illustration of the position of the upper block in the emergency operating condition of the hydraulic distribution system of the present invention;
fig. 9 is a schematic diagram of the communication relationship between the blind hole of the upper block and the oil port of the lower block in the emergency working state of the hydraulic distribution system of the present invention.
Description of the reference numerals
1 distribution system 2 working hydraulic system
3 first oil pump 4 second oil pump
5 Emergency valve group
P1 first port A1 second port
P2 third port A2 fourth port
T oil return port
61 upper block 62 lower block
63 Blind hole
7 one-way valve and 8 multi-way valve
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and therefore the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include one or more of the features described.
It should be noted that, the distribution hydraulic system of the present invention belongs to the hydraulic field, and it is obvious to those skilled in the art that the substantial technical concept thereof lies in the hydraulic connection relationship, and those skilled in the art can also simply replace the oil circuit or the valve, etc. after knowing the technical concept of the present invention, so as to implement the emergency function of the present invention, which also belongs to the protection scope of the present invention. The related hydraulic components, such as the directional valve, the relief valve, the motor, the hydraulic pump, etc., are well known to those skilled in the art and are commonly used in the existing hydraulic systems, and therefore, the hydraulic components will be described only briefly, and the description will focus on the inventive hydraulic connection relationship of the distribution hydraulic system of the present invention and the structure of the hydraulic components.
Referring to fig. 1 and 2, a distribution hydraulic system according to a basic embodiment of the present invention includes a distribution system 1, a working hydraulic system 2, a first oil pump 3 and a second oil pump 4, the first oil pump 3 is connected to the distribution system 1 through an emergency valve bank 5, and the second oil pump 4 is connected to the distribution system 1 and the working hydraulic system 2 through the emergency valve bank 5, respectively, so that oil can be selectively supplied to the distribution system 1 or the working hydraulic system 2 through the emergency valve bank 5.
In the above basic embodiment, by switching the emergency valve set 5, the second oil pump 4 can supply oil to the distribution system 1 or the working hydraulic system 2 selectively through the emergency valve set 5, and particularly, when the first oil pump 3 fails and cannot supply oil to the distribution system 1, the second oil pump 4 can supply oil to the distribution system 1 through the emergency valve set 5, so that an emergency function is realized, and the continuity of concrete pumping operation is ensured.
In order to better explain the technical idea of the present invention, the hydraulic distribution system of the present invention will be further described with reference to the accompanying drawings and specific hydraulic components.
The emergency valve group 5 comprises a reversing valve, and the reversing valve can adopt an electromagnetic reversing valve and a manual reversing valve, and preferably can adopt a rotary reversing valve; fig. 1 shows a case where the directional control valve is a manual directional control valve, which is a two-position five-way valve and includes five ports, i.e., a first port P1, a second port a1, a third port P2, a fourth port a2, and an oil return port T, where the first port P1 is connected to the first oil pump 3, the second port a1 is connected to the distribution system 1, the third port P2 is connected to the second oil pump 4, and the fourth port a2 is connected to the working hydraulic system 2; in a normal working state, the first oil port P1 is communicated with the second oil port a1, the first oil pump 3 supplies oil to the distribution system 1, the third oil port P2 is communicated with the fourth oil port a2, the second oil pump 4 supplies oil to the working hydraulic system 2, and each system is supplied with oil by an independent oil pump; as shown in fig. 2, when the first oil pump 3 fails, the manual directional valve is switched, the third port P2 is communicated with the second port a1, and the second oil pump 4 supplies oil to the distribution system 1, thereby realizing an emergency function.
As for the rotary reversing valve, as shown in fig. 3 to 9, the rotary reversing valve uniquely includes an upper block 61 and a lower block 62, the upper block 61 is mounted on the lower block 62, a first oil port P1, a second oil port a1, a third oil port P2, a fourth oil port a2 and an oil return port T are mounted on the lower block 62, and correspondingly, four blind holes 63 communicated two by two are formed on the upper block 61; in a normal working state, as shown in fig. 6 and 7, the four blind holes 63 arranged on the upper block 61 and communicated with each other in pairs can communicate the first oil port P1 with the second oil port a1, and communicate the third oil port P2 with the fourth oil port a 2; in the emergency working state, as shown in fig. 8 and 9, the upper block 61 is rotated by 180 °, and the first oil port P1 and the oil return port T can be communicated through the four blind holes 63 which are arranged on the upper block 61 and are communicated with each other in pairs, and the third oil port P2 and the second oil port a1 are communicated with each other, so that the second oil pump 4 supplies oil to the distribution system 1, thereby realizing the emergency function. The rotary direction valve may be controlled electromagnetically or manually, preferably manually.
The reversing valve is provided with an oil return port T, so that the first oil pump 3 with a fault can be communicated with an oil tank, the oil leakage or the system pollution of the first oil pump 3 can be effectively prevented, and furthermore, a filter can be connected to an oil path between the first oil pump 3 and the oil tank to prevent impurities from entering the oil tank; especially, some faults which can be eliminated by self, such as excessive local impurities of the oil path, cause the first oil pump 3 to be in fault, and thus, the first oil pump 3 is communicated with the oil tank, thereby preventing the risk generated by emptying or plugging the first oil pump 3, controlling the pressure in the oil path and protecting the safety of a hydraulic pipeline.
It should be noted that, in the above embodiment, the emergency valve group 5 is mainly explained by adopting a reversing valve; within the technical concept scope of the invention, the emergency valve group 5 can be composed in various specific forms, for example, the emergency valve group is composed of two-position three-way reversing valves, three oil ports of one two-position three-way reversing valve are respectively connected with the first oil pump 3, the distribution system 1 and the oil tank, three oil ports of the other two-position three-way reversing valve are respectively connected with the second oil pump 4, the working hydraulic system 2 and the distribution system 1, and the second oil pump 4 can be communicated with the distribution system 1 by switching the corresponding two-position three-way reversing valves, so that the emergency operation of the distribution system 1 is realized.
In addition, an overflow valve, a pressure reducing valve and the like can be further arranged in the emergency valve group 5 to protect a hydraulic oil path and avoid overload, and if the overflow valve, the pressure reducing valve and the like are arranged between the reversing valve and the working hydraulic system 2.
As a preferred embodiment, the emergency valve set 5 may be in one-way communication with the distribution system 1, and control hydraulic oil to flow in a set direction in an oil path, so that the hydraulic oil can be introduced into the distribution system 1 in one direction; specifically, a check valve may be disposed on an oil path between the emergency valve group 5 and the distribution system 1, or other valves capable of achieving the same effect, such as a reversing valve and a stop valve, may be disposed, and hydraulic oil is prevented from flowing from the distribution system 1 to the emergency valve group 5 by blocking the oil path between the emergency valve group 5 and the distribution system 1.
In a specific embodiment, the first oil pump 3 and the second oil pump 4 may employ existing hydraulic pumps, preferably, one-way variable hydraulic pumps.
In a preferred embodiment, the second oil pump 4 is connected with the emergency valve group 5 through the multi-way valve 8, and the multi-way valve 8 can also be connected with other hydraulic systems of concrete distribution equipment, so that the design of the hydraulic systems is simplified.
The working hydraulic system 2 can be selected by various hydraulic systems of concrete distribution equipment, for example, the working hydraulic system 2 can be a certain path of working oil path of a boom system of the concrete distribution equipment, that is, a fourth oil port a2 of the reversing valve is connected with an actuating mechanism of the boom system, when the first oil pump 3 fails, the actuating mechanism of the boom system cannot normally work, other actuating mechanisms of the boom system cannot normally work, the distribution system can normally work, and the concrete distribution equipment can continue to pump; preferably, the working hydraulic system 2 may also be a support leg system of the concrete distribution equipment, when the first oil pump 3 fails, except that the support leg system cannot work normally, the boom system, the distribution system and the pumping system may all work normally, and the concrete distribution equipment may continue to perform pumping operation; further, the working hydraulic system 2 may also be other auxiliary oil passages, such as a vibration damping oil passage, when the first oil pump 3 fails, the boom system, the distribution system, and the pumping system may all operate normally except that the vibration damping system may not operate normally, and the concrete distribution equipment may continue to perform pumping operation; it is easily conceivable that the working hydraulic system 2 may also comprise a variety of hydraulic systems.
Referring to fig. 1 to 9, a distribution hydraulic system according to a preferred embodiment of the present invention includes a distribution system 1, a working hydraulic system 2, a first oil pump 3, a second oil pump 4, and an emergency valve group 5, wherein the emergency valve group 5 includes a directional control valve, preferably a rotary directional control valve, the rotary directional control valve includes an upper block 61 and a lower block 62, the upper block 61 is mounted on the lower block 62, the lower block 62 is provided with a first oil port P1, a second oil port a1, a third oil port P2, a fourth oil port a2, and an oil return port T, the first oil port P1 is connected to the first oil pump 3, the second oil port a1 is connected to the distribution system 1, the third oil port P2 is connected to the second oil pump 4, the fourth oil port a2 is connected to the working hydraulic system 2, the oil return port T is connected to an oil tank through a filter to prevent impurities from entering the hydraulic system in an emergency working state, the upper block 61 is provided with four blind holes 63 which are communicated in pairs, the second port a1 can be selectively communicated with the first port P1 or the third port P2 through the four blind holes 63 of the upper block 61; specifically, in a normal working state, as shown in fig. 6 and 7, the four blind holes 63, which are arranged on the upper block 61 and are communicated with each other two by two, can communicate the first oil port P1 with the second oil port a1, and communicate the third oil port P2 with the fourth oil port a 2; in an emergency working state, as shown in fig. 8 and 9, the upper block 61 is rotated by 180 °, and the first oil port P1 and the oil return port T can be communicated through the four blind holes 63 arranged on the upper block 61 and communicated with each other in pairs, and the third oil port P2 and the second oil port a1 are communicated, so that the second oil pump 4 supplies oil to the distribution system 1, and an emergency function is realized; further, a check valve 7 is connected to an oil path between the second oil port a1 of the directional valve and the distribution system 1, and a forward port of the check valve 7 is connected to the second oil port a1 of the directional valve to guide hydraulic oil to be introduced into the distribution system 1; the second oil pump 4 is connected with a third oil port P2 of the reversing valve through the multi-way valve 8; preferably, the working hydraulic system 2 may be a concrete distribution equipment support leg system or other auxiliary oil passages (e.g., a vibration damping system), and when the first oil pump 3 fails, the boom system, the distribution system, and the pumping system may all work normally, and the concrete distribution equipment may continue to perform pumping operation.
The operation of the distribution hydraulic system of the present invention will be further described below in order to better understand the technical concept of the present invention.
In a normal working mode, as shown in fig. 1, the reversing valve is in a left-position function, the first oil port P1 of the reversing valve is communicated with the second oil port a1, the third oil port P2 is communicated with the fourth oil port a2, hydraulic oil provided by the first oil pump 3 sequentially flows into the distribution system 1 through the first oil port P1 and the second oil port a1 of the reversing valve and the check valve 7, and the distribution valve is driven to reverse, so that the concrete distribution equipment can pump concrete;
in the emergency operation mode, as shown in fig. 2, at this time, the distribution valve cannot complete the swing reversing due to the failure of the first oil pump 3; the reversing valve needs to be switched to enable the first oil port P1 to be communicated with the oil return port T, the third oil port P2 to be communicated with the second oil port a1, the second oil pump 4 supplies oil to the distribution system 1 sequentially through the multi-way valve 8, the third oil port P2, the second oil port a1 and the check valve 7, and the distribution valve is driven to reverse, so that the concrete distributing equipment can pump concrete.
In the emergency working mode, the working hydraulic system 2 can be a concrete distribution equipment support leg system or other auxiliary oil ways (such as a vibration damping system), and after the reversing valve is switched, the boom system, the distribution system and the pumping system can simultaneously and normally work to continuously pump.
In addition, during repair and maintenance, switching to the emergency operation mode is helpful for judging whether the distribution system 1 or the first oil pump 3 is out of order, and the efficiency of removing the failure is improved.
The concrete distribution equipment comprises the distribution hydraulic system in any one of the technical schemes, so that at least all the advantages brought by the technical scheme of the embodiment of the distribution hydraulic system are achieved.
The distribution hydraulic system is applied to the concrete distribution equipment, so that the concrete distribution equipment can pump concrete, has better continuous operation performance, effectively reduces loss, and has simple and reliable structure and convenient production and assembly.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. The utility model provides a distribution hydraulic system, includes distribution system (1), work hydraulic system (2), first oil pump (3) and second oil pump (4), its characterized in that, first oil pump (3) through emergent valves (5) with distribution system (1) is connected, second oil pump (4) pass through emergent valves (5) with distribution system (1) with work hydraulic system (2) are connected respectively, with can pass through emergent valves (5) selectively to distribution system (1) or work hydraulic system (2) oil supply.
2. The distribution hydraulic system according to claim 1, characterized in that the emergency valve group (5) comprises a directional valve comprising a first port (P1) connected to the first oil pump (3), a second port (a1) connected to the distribution system (1), a third port (P2) connected to the second oil pump (4) and a fourth port (a2) connected to the working hydraulic system (2); and the change valve can selectively communicate the third port (P2) thereof with the second port (a1) or the fourth port (a 2).
3. The distribution hydraulic system of claim 2, wherein the directional control valve is a rotary directional control valve, the rotary directional control valve comprises a lower block (62) and an upper block (61) mounted on the lower block (62), the first oil port (P1), the second oil port (a1), the third oil port (P2) and the fourth oil port (a2) are all disposed on the lower block (62), four blind holes (63) are disposed on the upper block (61) in two-to-two communication, so that the second oil port (a1) can be selectively communicated with the first oil port (P1) or the third oil port (P2) through the four blind holes (63) of the upper block (61).
4. A distribution hydraulic system according to any one of claims 1-3, characterized in that there is one-way communication between the emergency valve group (5) and the distribution system (1) so that hydraulic oil can be led one-way to the distribution system (1).
5. Distribution hydraulic system according to claim 4, characterized in that a non-return valve (7) is connected between the emergency valve group (5) and the distribution system (1).
6. A distribution hydraulic system according to any one of claims 1 to 3, characterized in that a multiplex valve (8) is connected between the second oil pump (4) and the emergency valve group (5).
7. The distribution hydraulic system according to any one of claims 1 to 3, characterized in that the emergency valve group (5) further comprises an oil return (T) connected to an oil tank.
8. Hydraulic distribution system according to claim 7, characterised in that a filter is connected between the return (T) and the tank.
9. The distribution hydraulic system according to any one of claims 1 to 3, characterized in that the working hydraulic system (2) is at least one of a concrete distribution equipment leg system, a vibration damping system, a working oil path of a boom system.
10. A concrete distribution plant, characterized in that it comprises a distribution hydraulic system according to any one of claims 1 to 9.
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| CN201910911677.3A CN110725821B (en) | 2019-09-25 | 2019-09-25 | Distribution hydraulic system and concrete distribution equipment |
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| CN201910911677.3A CN110725821B (en) | 2019-09-25 | 2019-09-25 | Distribution hydraulic system and concrete distribution equipment |
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| CN110725821B CN110725821B (en) | 2020-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610556A (en) * | 2020-12-07 | 2021-04-06 | 湖南挖挖工程科技有限公司 | Pump truck assembly integrated valve block structure and pump truck assembly |
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| CN110725821B (en) | 2020-11-06 |
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