CN111810475A - Hydraulic control system for swing oil cylinder of wet spraying trolley - Google Patents
Hydraulic control system for swing oil cylinder of wet spraying trolley Download PDFInfo
- Publication number
- CN111810475A CN111810475A CN202010813128.5A CN202010813128A CN111810475A CN 111810475 A CN111810475 A CN 111810475A CN 202010813128 A CN202010813128 A CN 202010813128A CN 111810475 A CN111810475 A CN 111810475A
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- Prior art keywords
- swing
- cylinder
- valve
- hydraulic
- oil cylinder
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- 238000005507 spraying Methods 0.000 title claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 27
- 239000003921 oil Substances 0.000 claims description 73
- 239000010720 hydraulic oil Substances 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims 3
- 238000005422 blasting Methods 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5158—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and an output member
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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)
Abstract
The invention discloses a hydraulic control system for a swing oil cylinder of a wet spraying trolley, which comprises a hydraulic pump (1), an energy accumulator (3), a first swing oil cylinder (7), a second swing oil cylinder (8), an unloading control valve group (4) and a swing cylinder control valve group (5). According to the invention, the automatic pressure relief function of the energy accumulator of the pumping system and the automatic pressure relief function of stopping the pumping system or the automatic pressure relief function of one key without stopping the pumping system are realized, so that safety accidents caused by misoperation are effectively avoided; the problem that the swing oil cylinder falls is effectively solved, the service life of the ball seat is prolonged, and the stability and the reliability of equipment are improved. The technical problem that the service life of a ball seat is short due to the fact that a swing oil cylinder of a pumping system easily falls and the swing oil cylinder impacts the ball seat in the extending moment under the condition that the oil cylinder and the ball seat are not completely attached in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of wet spraying machines, in particular to a hydraulic control system for a swing oil cylinder of a wet spraying trolley.
Background
The wet spraying machine is a construction operation device for spraying wet concrete, and is widely applied to primary support devices such as slope supports, highway tunnels, railway tunnels, underground engineering and the like. The pumping mechanism is a core functional component of the wet spraying trolley, the swing reversing time directly influences the size of the pulse of the pumped concrete, and further influences the homogeneity and the spraying quality of the sprayed concrete, and in order to reduce the reversing time as much as possible, in the existing swing oil cylinder control system, pressure oil stored in an energy accumulator and oil pumped out by hydraulic oil enter a swing oil cylinder together, so that the S-pipe distribution valve is quickly pushed to swing. The pressure oil of the energy accumulator should automatically unload pressure when in a non-working state so as to avoid personal injury caused by misoperation. The ball head and the swing seat of the swing oil cylinder of the series mechanism are not completely stuck to each other due to the inertia effect in the retraction process, so that a gap is formed, excessive impact force is caused to the ball seat at the moment of finishing the swing action, the service life of the ball seat is influenced, and the ball seat is easy to fall out of the gap between the ball head and the swing seat when the gap is serious, so that the cylinder falls. Therefore, how to improve the reliability, stability and safety of the operation of the swing oil cylinder of the wet spraying vehicle is a technical problem which needs to be solved urgently.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a hydraulic control system for a swing oil cylinder of a wet spraying trolley, and aims to solve the technical problems that the swing oil cylinder of a pumping system in the prior art is easy to drop and the swing oil cylinder impacts a ball seat at the moment of extending under the condition that the oil cylinder is not completely attached to the ball seat, so that the service life of the ball seat is short.
In order to achieve the aim, the invention provides a hydraulic control system for a swing oil cylinder of a wet spraying trolley, which comprises a hydraulic pump, an energy accumulator, a first swing oil cylinder, a second swing oil cylinder, an unloading control valve group and a swing cylinder control valve group, the pipeline output connecting end of the hydraulic pump and the energy accumulator is connected with a first swing oil cylinder and a second swing oil cylinder through a swing cylinder control valve group, the pipeline output ends of the first swing oil cylinder and the second swing oil cylinder are connected to an oil tank to drive a pumping valve, a load control valve group is arranged between the pipeline output connecting end of the hydraulic pump and the accumulator and the pipeline of the pumping valve, and pressure regulation is carried out on hydraulic oil at the connecting end of the output pipeline, and pressure relief control of the hydraulic oil in the pipeline connecting the first swing oil cylinder and the second swing oil cylinder is realized by utilizing the load control valve group and the swing cylinder control valve group, so that the extension and retraction of the first swing oil cylinder and the second swing oil cylinder are alternately driven and controlled.
Preferably, the hydraulic control system for the swing oil cylinder of the wet spraying trolley comprises a swing cylinder control valve group, wherein the swing cylinder control valve group comprises an electromagnetic valve DT1, an electromagnetic valve DT2, a spring reset hydraulic control reversing valve and a spring reset electromagnetic reversing valve, the spring reset hydraulic control reversing valve and the spring reset electromagnetic reversing valve are arranged on a connecting pipeline between the pipeline output connecting end and the first swing oil cylinder and the second swing oil cylinder, and the spring reset hydraulic control reversing valve and the spring reset electromagnetic reversing valve are logically controlled through electric signals received by the electromagnetic valve DT1 and the electromagnetic valve DT2 so as to control the first swing oil cylinder and the second swing oil cylinder to alternately extend and retract.
Preferably, the hydraulic control system for the swing oil cylinder of the wet-jet trolley comprises an unloading control valve group and a hydraulic control system, wherein the unloading control valve group comprises an electromagnetic valve DT3 and a pilot overflow valve, and the pilot overflow valve is logically controlled by the electromagnetic valve DT3 to realize the pressure-regulating overflow of the hydraulic oil at the output connecting end of the hydraulic pump and the accumulator pipeline.
Preferably, the hydraulic control system for the swing oil cylinder of the wet spraying trolley is characterized in that the pumping valve is driven to swing left and right according to the alternating extending and retracting actions of the first swing oil cylinder and the second swing oil cylinder, so that the rotation of a distribution valve of the pumping system is realized.
Preferably, an output pipeline of the hydraulic pump is provided with a first check valve.
Preferably, a hydraulic oil return line is further arranged between the swing cylinder control valve group and the oil tank, and is used for returning hydraulic oil retracting into the first swing oil cylinder or the second swing oil cylinder.
Preferably, a second check valve is arranged on the hydraulic oil return pipeline of the hydraulic control system for the swing oil cylinder of the wet spraying trolley.
According to the invention, the automatic pressure relief function of the energy accumulator of the pumping system and the automatic pressure relief function of stopping the pumping system or the automatic pressure relief function of one key without stopping the pumping system are realized, so that safety accidents caused by misoperation are effectively avoided; the problem that the swing oil cylinder falls is effectively solved, the service life of the ball seat is prolonged, and the stability and the reliability of equipment are improved. The technical problem that the service life of a ball seat is short due to the fact that a swing oil cylinder of a pumping system easily falls and the swing oil cylinder impacts the ball seat in the extending moment under the condition that the oil cylinder and the ball seat are not completely attached in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a circuit structure of a hydraulic control system of a swing cylinder of a wet spraying trolley according to the present invention;
the reference numbers illustrate:
1-a hydraulic pump; 2-a first one-way valve; 3-an accumulator; 4-unloading control valve group; 5-cylinder control valve group; 6-a second one-way valve; 7-a first swing cylinder; 8-a second swing oil cylinder.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
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. 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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
The invention provides an embodiment, and referring to fig. 1, fig. 1 is a schematic circuit structure diagram of a hydraulic control system of a swing oil cylinder of a wet spraying trolley.
As shown in fig. 1, in this embodiment, a hydraulic control system for a swing cylinder of a wet jet trolley comprises a hydraulic pump 1, an energy accumulator 3, a first swing cylinder 7, a second swing cylinder 8, an unloading control valve bank 4 and a swing cylinder control valve bank 5, wherein the pipeline output end of the hydraulic pump 1 and the pipeline output end of the energy accumulator 3 are connected with the first swing cylinder 7 and the second swing cylinder 8 through the swing cylinder control valve bank 5, the pipeline output ends of the first swing cylinder 7 and the second swing cylinder 8 are connected to an oil tank to drive a pumping valve, a load control valve bank is arranged between the pipeline output end of the hydraulic pump 1 and the pipeline of the pumping valve of the energy accumulator 3, the pressure of hydraulic oil at the output pipeline connection end is adjusted, and the pressure relief control in the pipeline connecting the first swing cylinder 7 and the second swing cylinder 8 is performed by using the load control valve bank and the swing cylinder control valve bank 5, and the alternative drive control of the extension and retraction of the first swing oil cylinder 7 and the second swing oil cylinder 8 is realized.
It should be noted that the tilt cylinder control valve group 5 includes an electromagnetic valve DT1, an electromagnetic valve DT2, a spring return hydraulic control directional valve and a spring return electromagnetic directional valve, where the spring return hydraulic control directional valve and the spring return electromagnetic directional valve are disposed on a connection pipeline between the pipeline output connection end and the first swing oil cylinder 7 and the second swing oil cylinder 8, and the spring return hydraulic control directional valve and the spring return electromagnetic directional valve are logically controlled by electric signals received by the electromagnetic valve DT1 and the electromagnetic valve DT2, so as to control the first swing oil cylinder 7 and the second swing oil cylinder 8 to alternately extend and retract.
The unloading control valve group 4 comprises an electromagnetic valve DT3 and a pilot overflow valve, and the pilot overflow valve is logically controlled by the electromagnetic valve DT3 to realize the pressure-regulating overflow of the hydraulic oil at the output connection end of the hydraulic pump 1 and the accumulator 3.
It should be noted that the pumping valve is driven to swing left and right according to the alternating extending and retracting actions of the first swing cylinder 7 and the second swing cylinder 8, so as to realize the rotation of the distribution valve of the pumping system.
Further, an output pipeline of the hydraulic pump 1 is provided with a first one-way valve 2; a hydraulic oil return pipeline is also arranged between the swing cylinder control valve group 5 and the oil tank and is used for returning hydraulic oil retracting into the first swing oil cylinder 7 or the second swing oil cylinder 8; and a second one-way valve 6 is arranged on the hydraulic oil return pipeline.
To further achieve the above object, the following describes the usage principle of the control system of the present embodiment, specifically:
as shown in fig. 1, hydraulic oil is pumped out from the port of the hydraulic pump 1B, passes through the first check valve 2, and is merged with the hydraulic oil released from the accumulator 3 to reach the unloading valve group 4, when the DT3 valve group of the unloading valve group 4 works at the right work station, the pilot overflow valve has the functions of pressure regulation and overflow, the pressure-regulated hydraulic oil respectively reaches the P ports of the spring-return hydraulic control reversing valve and the spring-return double-acting electromagnetic reversing valve of the tilt cylinder control valve group 5, under the condition that the electromagnetic valves DT1 and DT2 do not obtain electric signals at the same time, the electromagnetic directional valve and the hydraulic control directional valve are both in a neutral state, the swing oil cylinder is kept static at the moment, the electromagnetic directional valve coil DT1 is in a left station state after receiving an electric signal, meanwhile, the hydraulic control reversing valve is controlled to be in a left station state, at the moment, the second swing oil cylinder 8 extends out to push the first swing oil cylinder 7 to retract, and the pumping S valve swings leftwards; when the electromagnetic reversing valve coil DT2 obtains an electric signal, the electromagnetic reversing valve coil DT2 is in a right station state, and the hydraulic control reversing valve is controlled to be in the right station state, at the moment, the first swing oil cylinder 7 extends out to push the second swing oil cylinder 8 to retract, and the pumping S valve swings rightwards; the rotation of the distribution valve of the pumping system is realized by controlling the signals of the electromagnetic coils DT1 and DT2 of the spring-return double-acting electromagnetic directional valve to control the alternating telescopic action of the first swing oil cylinder 7 and the second swing oil cylinder 8. The hydraulic oil retracting the swing oil cylinder flows back to the oil tank through the second one-way valve 6.
It should be understood that the opening pressure of the second check valve 6 keeps the ball head of the retraction cylinder in full contact with the swing seat. Under the condition that the unloading control valve group 4 works at the right station, the pilot overflow valve of the unloading control valve group plays an unloading role, hydraulic oil is controlled to directly flow back to the oil tank, and the energy accumulator 3 automatically relieves pressure.
In the embodiment, the automatic pressure relief function of the energy accumulator 3 of the pumping system and the automatic pressure relief function of stopping the pumping system or the automatic pressure relief function of one key without stopping the pumping system are realized, so that safety accidents caused by misoperation are effectively avoided; the problem that the swing oil cylinder falls is effectively solved, the service life of the ball seat is prolonged, and the stability and the reliability of equipment are improved. The technical problem that the service life of a ball seat is short due to the fact that a swing oil cylinder of a pumping system easily falls and the swing oil cylinder impacts the ball seat in the extending moment under the condition that the oil cylinder and the ball seat are not completely attached in the prior art is solved.
The methods, systems, and modules disclosed herein may be implemented in other ways. For example, the above-described embodiments are merely illustrative, and for example, the division of the modules may be merely a logical division, and an actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be referred to as an indirect coupling or communication connection through some interfaces, systems or modules, and may be in an electrical, mechanical or other form.
The modules described as discrete components may or may not be physically separate, and the components shown as modules may or may not be physical modules, may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a wet blasting platform truck swing hydro-cylinder hydraulic control system, a serial communication port, swing hydro-cylinder hydraulic control system includes hydraulic pump (1), energy storage ware (3), first swing hydro-cylinder (7), second swing hydro-cylinder (8), off-load control valve group (4) and tilt cylinder control valve group (5), first swing hydro-cylinder (7) and second swing hydro-cylinder (8) are connected via tilt cylinder control valve group (5) to the pipeline output connection end of hydraulic pump (1) and energy storage ware (3), the pipeline output end of first swing hydro-cylinder (7) and second swing hydro-cylinder (8) is connected to the oil tank and drives the pump valve, be provided with load valve group control valve between the pipeline output connection end of hydraulic pump (1) and energy storage ware (3) and the pump valve pipeline, carry out pressure adjustment to the hydraulic oil of output pipeline connection end, utilize load control valve group and tilt cylinder control valve group (5) to connecting first swing hydro-cylinder (7) and second swing hydro-cylinder (8) ) The pressure release control of the hydraulic oil in the pipeline realizes the alternate drive control of the extension and retraction of the first swing oil cylinder (7) and the second swing oil cylinder (8).
2. The hydraulic control system for the swing cylinder of the wet spraying trolley according to claim 1, wherein the swing cylinder control valve group (5) comprises a solenoid valve DT1, a solenoid valve DT2, a spring return hydraulic control directional valve and a spring return electromagnetic directional valve, the spring return hydraulic control directional valve and the spring return electromagnetic directional valve are arranged on a connecting pipeline between the pipeline output connection end and the first swing cylinder (7) and the second swing cylinder (8), and the spring return hydraulic control directional valve and the spring return electromagnetic directional valve are logically controlled through electric signals received by the solenoid valve DT1 and the solenoid valve DT2 so as to control the first swing cylinder (7) and the second swing cylinder (8) to alternately extend and retract.
3. The hydraulic control system for the swing oil cylinder of the wet spraying trolley according to claim 1, wherein the unloading control valve group (4) comprises an electromagnetic valve DT3 and a pilot overflow valve, and the pilot overflow valve is logically controlled by the electromagnetic valve DT3 to realize the pressure-regulating overflow of hydraulic oil at the pipeline output connection end of the hydraulic pump (1) and the accumulator (3).
4. The hydraulic control system of a wet-jet trolley swing cylinder as claimed in claim 1, characterized in that the pumping valve is driven to swing left and right according to the alternate extending and retracting actions of the first swing cylinder (7) and the second swing cylinder (8) to realize the rotation of the distribution valve of the pumping system.
5. The hydraulic control system of a wet-jet trolley swing cylinder according to claim 1, characterized in that the output line of the hydraulic pump (1) is provided with a first check valve (2).
6. The hydraulic control system for the swing cylinder of the wet spraying trolley according to claim 1, wherein a hydraulic oil return line is further arranged between the swing cylinder control valve group (5) and the oil tank, and is used for returning hydraulic oil which retracts the first swing cylinder (7) or the second swing cylinder (8).
7. The hydraulic control system of the swing cylinder of the wet-jet trolley according to claim 6, characterized in that a second check valve (6) is arranged on the hydraulic oil return line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813128.5A CN111810475A (en) | 2020-08-13 | 2020-08-13 | Hydraulic control system for swing oil cylinder of wet spraying trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813128.5A CN111810475A (en) | 2020-08-13 | 2020-08-13 | Hydraulic control system for swing oil cylinder of wet spraying trolley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111810475A true CN111810475A (en) | 2020-10-23 |
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ID=72859826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010813128.5A Pending CN111810475A (en) | 2020-08-13 | 2020-08-13 | Hydraulic control system for swing oil cylinder of wet spraying trolley |
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| Country | Link |
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| CN (1) | CN111810475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083893A (en) * | 2021-11-18 | 2022-02-25 | 山东鲁烟莱州印务有限公司 | Gravure printing line connection concave-convex device and using method thereof |
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|---|---|---|---|---|
| JPH0550901U (en) * | 1991-12-11 | 1993-07-02 | 三菱重工業株式会社 | Auxiliary wheel position control device for linear motor car |
| JPH11193778A (en) * | 1997-12-27 | 1999-07-21 | Ishikawajima Constr Mach Co | Hydraulic circuit of oscillating valve concrete pump |
| CN102734236A (en) * | 2012-07-12 | 2012-10-17 | 三一重工股份有限公司 | Pumping reversal hydraulic control system, control method and concrete conveying pump |
| CN202690347U (en) * | 2012-05-30 | 2013-01-23 | 三一重工股份有限公司 | Concrete pump swinging cylinder hydraulic system and concrete pumping device |
| CN104329306A (en) * | 2014-10-31 | 2015-02-04 | 徐州徐工施维英机械有限公司 | Hydraulic control system and method as well as pump |
| CN204284043U (en) * | 2014-10-31 | 2015-04-22 | 徐州徐工施维英机械有限公司 | A kind of hydraulic control system and pump |
| CN110966266A (en) * | 2019-12-30 | 2020-04-07 | 青岛九合重工机械有限公司 | Novel single-pump hydraulic control pumping system |
| CN216044683U (en) * | 2020-08-13 | 2022-03-15 | 四川新筑智能工程装备制造有限公司 | Hydraulic control system for swing oil cylinder of wet spraying trolley |
-
2020
- 2020-08-13 CN CN202010813128.5A patent/CN111810475A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0550901U (en) * | 1991-12-11 | 1993-07-02 | 三菱重工業株式会社 | Auxiliary wheel position control device for linear motor car |
| JPH11193778A (en) * | 1997-12-27 | 1999-07-21 | Ishikawajima Constr Mach Co | Hydraulic circuit of oscillating valve concrete pump |
| CN202690347U (en) * | 2012-05-30 | 2013-01-23 | 三一重工股份有限公司 | Concrete pump swinging cylinder hydraulic system and concrete pumping device |
| CN102734236A (en) * | 2012-07-12 | 2012-10-17 | 三一重工股份有限公司 | Pumping reversal hydraulic control system, control method and concrete conveying pump |
| CN104329306A (en) * | 2014-10-31 | 2015-02-04 | 徐州徐工施维英机械有限公司 | Hydraulic control system and method as well as pump |
| CN204284043U (en) * | 2014-10-31 | 2015-04-22 | 徐州徐工施维英机械有限公司 | A kind of hydraulic control system and pump |
| CN110966266A (en) * | 2019-12-30 | 2020-04-07 | 青岛九合重工机械有限公司 | Novel single-pump hydraulic control pumping system |
| CN216044683U (en) * | 2020-08-13 | 2022-03-15 | 四川新筑智能工程装备制造有限公司 | Hydraulic control system for swing oil cylinder of wet spraying trolley |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083893A (en) * | 2021-11-18 | 2022-02-25 | 山东鲁烟莱州印务有限公司 | Gravure printing line connection concave-convex device and using method thereof |
| CN114083893B (en) * | 2021-11-18 | 2023-01-13 | 山东鲁烟莱州印务有限公司 | Gravure printing line connection concave-convex device and using method thereof |
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