CN111810474A - Wet spraying trolley pumping hydraulic control system - Google Patents
Wet spraying trolley pumping hydraulic control system Download PDFInfo
- Publication number
- CN111810474A CN111810474A CN202010812397.XA CN202010812397A CN111810474A CN 111810474 A CN111810474 A CN 111810474A CN 202010812397 A CN202010812397 A CN 202010812397A CN 111810474 A CN111810474 A CN 111810474A
- Authority
- CN
- China
- Prior art keywords
- pumping
- oil
- valve
- control
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 191
- 238000005507 spraying Methods 0.000 title claims abstract description 15
- 239000003921 oil Substances 0.000 claims abstract description 260
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 39
- 230000009471 action Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000005422 blasting Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000087 stabilizing 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
Landscapes
- 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 pumping hydraulic control system of a wet spraying trolley, which comprises: the device comprises an alternating current motor (1), a constant-power open type pump assembly (2), a pumping control valve block (3), a pumping left oil cylinder (4), a pumping right oil cylinder (5) and a sensor assembly. According to the invention, the problems that the stroke and the productivity of the piston rod are reduced due to the fact that the closed volume of the rod cavity of the hydraulic oil cylinder is increased caused by the problems of internal leakage of hydraulic oil and the like are solved; the wet spraying trolley is in a low-flow low-pressure material waiting state, energy is saved, system heating is reduced, and economical efficiency is good; the problems of hydraulic oil exchange and replacement of the rod-closed cavity of the pumping oil cylinder are solved; the technical problems that the pressure transmitter calibration workload, the personnel cost and the calibration efficiency difference are large in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of wet spraying machines, in particular to a hydraulic control system for pumping of a wet spraying trolley.
Background
A concrete pumping hydraulic control system is a control system suitable for concrete pumping machinery, and aims at the construction working condition of a wet spraying trolley, how to wait for materials and save energy to reduce the heating of the hydraulic control system and solve the problems that the volume of hydraulic oil in a closed cavity is increased, the pumping stroke is increased and the productivity is reduced due to internal leakage and the like of a pumping oil cylinder. The hydraulic control system that this patent provided more has economic nature and practicality. Therefore, how to improve the economy and the practicability of the hydraulic control system 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 pumping of a wet-spraying trolley, and aims to solve the technical problems that in the prior art, the closed volume of a rod cavity of a hydraulic oil cylinder is increased due to the problems of internal leakage of hydraulic oil and the like, so that the stroke and the productivity of a piston rod are reduced.
In order to achieve the above object, the present invention provides a hydraulic pumping control system for a wet spraying trolley, the hydraulic pumping control system comprising: the constant-power pump comprises an alternating current motor, a constant-power open pump assembly, a pumping control valve block, a pumping left oil cylinder, a pumping right oil cylinder and a sensor assembly, wherein an oil inlet pipeline of the constant-power open pump assembly is connected with an oil tank, an oil inlet pipeline of the pumping control valve block is connected with an oil outlet pipeline of the constant-power open pump assembly, a first driving oil port pipeline and a second driving oil port pipeline of the pumping control valve block are respectively connected with a rodless cavity oil port of the pumping left oil cylinder and a rodless cavity oil port of the pumping right oil cylinder, the sensor assembly is installed at the preset extension length and retraction length of the pumping left oil cylinder and the pumping right oil cylinder, control signals are transmitted to the pumping control valve block according to position information of piston rods of the pumping left oil cylinder and the pumping right oil cylinder collected by the sensor assembly, and then.
Preferably, the hydraulic pumping control system of the wet jet trolley comprises a pumping control valve block, a direct-acting overflow valve, a pilot overflow valve and a state control solenoid valve, wherein an oil inlet of the direct-acting overflow valve and an oil inlet of the pilot overflow valve are connected with an oil inlet pipeline of the pumping control valve block, oil outlets of the direct-acting overflow valve, the pilot overflow valve and the state control solenoid valve are connected with an oil outlet of the pumping control valve block, and the flow direction of hydraulic oil of the pumping control valve block is regulated according to an electric control signal of the state control solenoid valve so as to control the operation state of the pumping control system.
Preferably, in the wet-jet trolley pumping hydraulic control system, an oil inlet of the direct-acting overflow valve is connected with a spring control oil port of a pilot overflow valve, and the spring control oil port of the direct-acting overflow valve is connected with an oil inlet of a state control solenoid valve and used for controlling the on-off of a spring control oil path of the direct-acting overflow valve by the state control solenoid valve; and the hydraulic control oil port of the direct-acting overflow valve and the pilot overflow valve is connected with the oil inlet of the pumping control valve block and used for controlling the pressure of the oil inlet of the pumping control valve block by the direct-acting overflow valve.
Preferably, the pumping control valve block of the wet-jet trolley pumping hydraulic control system further comprises a spring-reset double-acting electromagnetic valve and a spring-reset hydraulic valve; the oil inlet of the pumping control valve block is respectively connected with the oil inlets of the spring reset double-acting electromagnetic valve and the spring reset hydraulic valve, the oil outlet of the pumping control valve block is respectively connected with the oil outlets of the spring reset double-acting electromagnetic valve and the spring reset hydraulic valve, a first driving oil port and a second driving oil port of the spring reset hydraulic valve are respectively connected with the pumping left oil cylinder and the pumping right oil cylinder, and the pumping left oil cylinder and the pumping right oil cylinder are driven to pump according to the control action of the spring reset double-acting electromagnetic valve and the spring reset hydraulic valve.
Preferably, a wet blasting platform truck pump sending hydraulic control system, the first drive hydraulic fluid port of spring reset double-acting solenoid valve is connected with spring reset hydraulic valve left station control hydraulic fluid port, the second drive hydraulic fluid port of spring reset double-acting solenoid valve is connected with spring reset hydraulic valve right station control hydraulic fluid port for the action execution of spring reset double-acting solenoid valve control spring reset hydraulic valve.
Preferably, the wet-spraying trolley pumping hydraulic control system further comprises an automatic oil discharge control valve block, an oil inlet of the automatic oil discharge valve block is connected with an oil port which is communicated with the pumping left oil cylinder and the pumping right oil cylinder, and an oil outlet of the automatic oil discharge control valve block is connected with an oil tank through an oil discharge ball valve so as to discharge hydraulic oil in rod cavities of the pumping left oil cylinder and the pumping right oil cylinder and ensure that the pumping system is stable.
According to the invention, the problems that the stroke and the productivity of the piston rod are reduced due to the fact that the closed volume of the rod cavity of the hydraulic oil cylinder is increased caused by the problems of internal leakage of hydraulic oil and the like are solved; the wet spraying trolley is in a low-flow low-pressure material waiting state, energy is saved, system heating is reduced, and economical efficiency is good; the problems of hydraulic oil exchange and replacement of the rod-closed cavity of the pumping oil cylinder are solved; the technical problems that the pressure transmitter calibration workload, the personnel cost and the calibration efficiency difference are large in the prior art are 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 circuit structure diagram of a hydraulic control system for pumping of a wet spraying trolley according to the present invention;
FIG. 2 is a structural diagram illustrating a state that a hydraulic oil is changed by a pumping oil cylinder of the wet-jet trolley pumping hydraulic control system according to the present invention;
the reference numbers illustrate:
1-an alternating current motor; 2-a constant power open pump assembly; 3-pumping control valve block; 4-pumping the left oil cylinder; 5-pumping the right oil cylinder; 6-a first sensor; 7-a second sensor; 8-a third sensor; 9-a fourth sensor; 10-automatic oil discharge control valve block; 11-oil drainage ball valve; 12-a direct-acting overflow valve; 13-a pilot overflow valve; 14-spring-return double-acting solenoid valve; 15-spring return hydraulic valve; 16-state control solenoid valve.
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 pumping control system of a wet spraying trolley provided by the invention.
As shown in fig. 1, in the present embodiment, a wet blasting trolley pumping hydraulic control system includes: an alternating current motor 1, a constant power open type pump assembly 2, a pumping control valve block 3, a pumping left oil cylinder 4, a pumping right oil cylinder 5 and a sensor assembly, an oil inlet pipeline of the constant-power open type pump assembly 2 is connected with an oil tank, an oil inlet pipeline of the pumping control valve block 3 is connected with an oil outlet pipeline of the constant-power open type pump assembly 2, a first driving oil port pipeline and a second driving oil port pipeline of the pumping control valve block 3 are respectively connected with a rodless cavity oil port of the pumping left oil cylinder 4 and a rodless cavity oil port of the pumping right oil cylinder 5, sensor components are arranged at the preset extending length and retracting length positions of the pumping left oil cylinder 4 and the pumping right oil cylinder 5, and transmitting a control signal to the pumping control valve block 3 according to the position information of the piston rods of the pumping left oil cylinder 4 and the pumping right oil cylinder 5 acquired by the sensor assembly, and further controlling the pumping left oil cylinder 4 and the pumping right oil cylinder 5 to realize the uninterrupted pumping reciprocating process.
It should be noted that the pumping control valve block 3 includes a direct-acting overflow valve, a pilot overflow valve 13, and a state control solenoid valve 16, an oil inlet of the direct-acting overflow valve and an oil inlet of the pilot overflow valve 13 are connected to an oil inlet pipeline of the pumping control valve block 3, oil outlets of the direct-acting overflow valve, the pilot overflow valve 13, and the state control solenoid valve 16 are connected to an oil outlet of the pumping control valve block 3, and a hydraulic oil flow direction of the pumping control valve block 3 is regulated according to an electric control signal of the state control solenoid valve 16 to control an operation state of the pumping system.
It should be noted that an oil inlet of the direct overflow valve 12 is connected with a spring control oil port of the pilot overflow valve 13, and the spring control oil port of the direct overflow valve 12 is connected with an oil inlet of the state control solenoid valve 16, so that the state control solenoid valve 16 controls the on-off of a spring control oil path of the direct overflow valve 12; the hydraulic control oil ports of the direct-acting overflow valve 12 and the pilot overflow valve 13 are connected with the oil inlet of the pumping control valve block 3, and the pressure of the oil inlet of the pumping control valve block 3 is controlled by the direct-acting overflow valve 12.
Further, the pumping control valve block 3 further comprises a spring-return double-acting electromagnetic valve 14 and a spring-return hydraulic valve 15; an oil inlet of the pumping control valve block 3 is connected with oil inlets of the spring reset double-acting electromagnetic valve 14 and the spring reset hydraulic valve 15 respectively, an oil outlet of the pumping control valve block 3 is connected with oil outlets of the spring reset double-acting electromagnetic valve 14 and the spring reset hydraulic valve 15 respectively, a first driving oil port and a second driving oil port of the spring reset hydraulic valve 15 are connected with a pumping left oil cylinder 4 and a pumping right oil cylinder 5 respectively, and the pumping left oil cylinder 4 and the pumping right oil cylinder 5 are driven to pump according to the control action of the spring reset double-acting electromagnetic valve 14 and the spring reset hydraulic valve 15.
A first driving oil port of the spring-return double-acting solenoid valve 14 is connected with a left station control oil port of the spring-return hydraulic valve 15, and a second driving oil port of the spring-return double-acting solenoid valve 14 is connected with a right station control oil port of the spring-return hydraulic valve 15 and used for the spring-return double-acting solenoid valve 14 to control the action execution of the spring-return hydraulic valve 15.
The pumping hydraulic control system further comprises an automatic oil discharge control valve block 10, an oil inlet of the automatic oil discharge valve block is connected with an oil port which is communicated with the pumping left oil cylinder 4 and the pumping right oil cylinder 5, and an oil outlet of the automatic oil discharge control valve block 10 is connected with an oil tank through an oil discharge ball valve 11 and used for discharging hydraulic oil in rod cavities of the pumping left oil cylinder 4 and the pumping right oil cylinder 5, so that the stability of the pumping system is guaranteed.
To further achieve the above object, the operation principle of the control system of the present embodiment will now be described in detail, specifically:
as shown in figure 1, the invention provides a concrete pumping control system scheme and a concrete pumping control machine, the concrete pumping hydraulic system is safe and reliable in working, and the stability of the concrete pumping machine in working is greatly improved.
An oil outlet B port of the constant-power open type pump 2 is connected with an oil inlet P port of the pumping control valve block 3; an oil inlet P port of the pumping control valve block is communicated with oil inlets of a direct-acting overflow valve 12 and a pilot overflow valve 13, an oil inlet of the direct-acting overflow valve 12 is communicated with a spring control oil port of the pilot overflow valve 13, a spring control oil port of the direct-acting overflow valve 12 is communicated with an oil inlet of a state control solenoid valve 16, oil outlets of the direct-acting overflow valve 12, the pilot overflow valve 13 and the solenoid valve 16 are communicated with an oil outlet T port of the pumping control valve block, and hydraulic control oil ports of the direct-acting overflow valve 12 and the pilot overflow valve 13 are communicated with; the pressure of the P port of the oil inlet of the pumping control valve block 3 is controlled by the direct-acting overflow valve 12, the on-off of the spring control oil path of the direct-acting overflow valve 12 is controlled by the electromagnetic valve 16, when the electromagnet DT5 of the electromagnetic valve 16 does not receive an electric signal, the electromagnetic valve 16 is in a first station state, the pilot overflow valve 13 plays an unloading role, hydraulic oil of the P port of the oil inlet of the pumping control valve block directly flows to the T port of the oil outlet of the pumping control valve block through the spring control oil path of the direct-acting overflow valve so as to flow into the oil tank, and at the moment, the constant-power open pump.
When the electromagnet DT5 of the state control electromagnetic valve 16 receives the electric signal and is in the second station state, the direct-acting overflow valve 12 and the pilot overflow valve 13 form a secondary pressure regulating loop to play a role in pressure regulation, and the pressure at the position P of the oil inlet is preset pressure of the direct-acting overflow valve 12. An oil inlet P port of the pumping control valve block is respectively communicated with oil inlets P ports of the spring resetting double-acting electromagnetic valve 14 and the spring resetting hydraulic valve 15, and an oil outlet T port of the pumping control valve block is respectively communicated with oil outlets T ports of the spring resetting double-acting electromagnetic valve 14 and the spring resetting hydraulic valve 15; the port A of the spring reset double-acting electromagnetic valve 14 is communicated with a left station control oil port of the spring reset hydraulic valve, and the port B of the spring reset double-acting electromagnetic valve 14 is communicated with a right station control oil port of the spring reset hydraulic valve; the port A of the spring reset hydraulic valve is communicated with the rodless cavity oil port of the pumping left oil cylinder 4, and the port B of the spring reset hydraulic valve is communicated with the rodless cavity oil port of the pumping right oil cylinder 5; oil ports of rod cavities of the pumping left oil cylinder 4 and the pumping right oil cylinder 5 are mutually communicated and are communicated with an oil inlet P port of the automatic oil discharge valve block together; an oil outlet T port of the automatic oil discharge control valve block is communicated with a port B thereof and an oil tank, and a port A thereof is communicated with the ball valve 11.
A first sensor 6, a third sensor 8, a second sensor 7 and a fourth sensor 9 are respectively arranged on the preset extension length and the preset retraction length of the pumping left oil cylinder 4 and the pumping right oil cylinder 5.
Hydraulic oil flows to oil inlets P of the spring resetting double-acting electromagnetic valve 14 and the spring resetting hydraulic valve 15 from the P ports respectively, at the moment, the spring resetting double-acting electromagnetic valve 14 and the spring resetting hydraulic valve 15 are both in a middle working position state, and a hydraulic oil pumping oil cylinder at the oil inlet P port of the pumping control valve block does not act. The hydraulic oil pressure at the position of an oil inlet P port of the pumping control valve block 3 continuously rises along with the pumping of the hydraulic pump until the pressure of the hydraulic control oil path of the pilot overflow valve 13 exceeds the preset pressure of the direct overflow valve 12, and the hydraulic oil flows to a quick T port of the pumping control valve through the pilot overflow valve so as to flow to an oil tank and play a role in stabilizing the pressure.
An electric signal is sent to the left end electromagnet DT1 of the spring reset double-acting electromagnetic valve 14 through the pumping starting button, so that the spring reset double-acting electromagnetic valve 14 is in a left station state, at the moment, hydraulic oil is controlled by the spring reset double-acting electromagnetic valve 14 to enter from a left end control oil port of the spring reset hydraulic valve 15 and flow out from a right end control oil port of the spring reset hydraulic valve, at the moment, the spring reset hydraulic valve 15 is in a left station state, the hydraulic oil is controlled to flow into a rodless cavity of the pumping right oil cylinder 5, a piston rod of the pumping right oil cylinder is extended, the. The piston rod of the pumping right oil cylinder 5 reaches the maximum telescopic length, the piston rod of the pumping left oil cylinder 4 reaches the minimum telescopic length, at the moment, the first sensor 6 and the fourth sensor 9 have signals, and the third sensor 8 and the second sensor 7 have no signals; the first sensor 6 gives an electric signal to the right electromagnet DT2 of the spring reset double-acting solenoid valve to enable the spring reset double-acting solenoid valve to be in a right station state, at the moment, the spring reset double-acting solenoid valve 14 controls hydraulic oil to enter from a right control oil port of the spring reset hydraulic valve 15 and flow out from a left control oil port of the spring reset hydraulic valve, at the moment, the spring reset hydraulic valve 15 is in a right station state, controls the hydraulic oil to flow into a rodless cavity of the pumping left oil cylinder 4 to enable a piston rod of the pumping left oil cylinder to extend out, and controls the hydraulic oil to. Until the piston rod of the pumping left oil cylinder 4 reaches the maximum telescopic length, the piston rod of the pumping right oil cylinder 5 reaches the minimum telescopic length, at the moment, the third sensor 8 and the second sensor 7 have signals, and the first sensor 6 and the fourth sensor 9 have no signals; at the moment, the second sensor 7 gives an electric signal to the electromagnet at the left end of the spring reset double-acting electromagnetic valve, the pumping left oil cylinder 4 and the pumping right oil cylinder 5 repeat the actions, and the pumping is continuously and circularly repeated, so that the pumping system is ensured to pump continuously until the pumping start button is reset and stops rotationally.
In the whole normal working process of the pumping oil cylinder, the automatic oil discharge control valve block is always in a middle working position state, rod cavities of the pumping left oil cylinder 4 and the pumping right oil cylinder 5 become closed cavities, the volume of the closed cavities is increased due to internal leakage of hydraulic oil, so that the stroke of a piston rod is shortened, and in order to avoid the situation, whether oil is discharged or not is controlled by controlling the signal on-off of the electromagnet DT4 at the left end of the pumping valve block through a program. Setting that when the pumping left oil cylinder 4 and the pumping right oil cylinder 5 work normally, namely three conditions that the third sensor 8 and the second sensor 7 have signals simultaneously and the first sensor 6 and the fourth sensor 9 have no signals simultaneously or the first sensor 6 and the fourth sensor 9 have signals simultaneously and the third sensor 8 and the second sensor 7 have no signals simultaneously or the four sensors have no signals simultaneously are normal conditions, the left end electromagnet DT4 of the automatic oil drain valve block is not electrified under the normal conditions, and is in a middle position state, and the rod cavities of the two pumping oil cylinders form a closed cavity; the two conditions that the first sensor 6 has a signal and the fourth sensor 9 has no signal (namely the pumping left oil cylinder 4 has rod cavity volume increase and the piston rod stroke is shortened) or the second sensor 7 has a signal and the third sensor 8 has no signal (namely the pumping right oil cylinder 5 has rod cavity volume increase and the piston rod is shortened) are set as abnormal conditions, at the moment, the left end electromagnet DT4 of the automatic oil discharge control valve block is electrified and is in a left station state, the pumping left oil cylinder 4 and the pumping right oil cylinder 5 are controlled to have rod cavities to be communicated with an oil tank, redundant hydraulic oil in the rod cavities is discharged until the piston rod stroke returns to be normal, and therefore the pumping system is guaranteed to stably pump concrete.
The inner wall of the pumping oil cylinder can be contacted with water, so that the phenomenon of emulsification caused by a small amount of mixed hydraulic oil and water is inevitable, and the hydraulic oil in the rodless cavity is difficult to emulsify because water is not easy to remain due to the circulation of the hydraulic oil in the whole hydraulic system; the rod cavity forms a closed cavity during working, water in the cavity is not easy to discharge, and an emulsification phenomenon is easy to generate, so that the hydraulic oil in the rod cavity needs to be regularly discharged and new hydraulic oil needs to be injected. At the moment, emulsified hydraulic oil can be discharged only by giving an electric signal to an electromagnet DT3 at the right end of the automatic oil discharge control valve block and simultaneously opening the oil discharge ball valve 11; after oil is drained, the action state of the pumping oil cylinder is as shown in figure 2, at the moment, the electricity of the electromagnet DT3 at the right end of the automatic oil drain control valve is disconnected to enable the automatic oil drain control valve to be in a middle working position state, the sensor is closed, then only an electric signal needs to be sent to the right end of the spring reset double-acting electromagnetic valve through the pumping starting button, hydraulic oil is injected into the rodless cavity of the pumping right oil cylinder 5, the hydraulic oil in the rodless cavity of the pumping right oil cylinder 5 is injected into the rod cavity of the pumping right oil cylinder through the single throttle valve, the rod cavity of the pumping left oil cylinder 4 is filled.
In the embodiment, the problem that the stroke and the productivity of the piston rod are reduced due to the fact that the closed volume of the rod cavity of the hydraulic oil cylinder is increased due to the problems of internal leakage of hydraulic oil and the like is solved; the wet spraying trolley is in a low-flow low-pressure material waiting state, energy is saved, system heating is reduced, and economical efficiency is good; the problems of hydraulic oil exchange and replacement of the rod-closed cavity of the pumping oil cylinder are solved; the technical problems that the pressure transmitter calibration workload, the personnel cost and the calibration efficiency difference are large in the prior art are 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 (6)
1. A wet blasting trolley pumping hydraulic control system, characterized in that the pumping hydraulic control system comprises: the constant-power pump control system comprises an alternating current motor (1), a constant-power open type pump assembly (2), a pumping control valve block (3), a pumping left oil cylinder (4), a pumping right oil cylinder (5) and a sensor assembly, wherein an oil inlet pipeline of the constant-power open type pump assembly (2) is connected with an oil tank, an oil inlet pipeline of the pumping control valve block (3) is connected with an oil outlet pipeline of the constant-power open type pump assembly (2), a first driving oil port pipeline and a second driving oil port pipeline of the pumping control valve block (3) are respectively connected with a rodless cavity oil port of the pumping left oil cylinder (4) and a rodless cavity oil port of the pumping right oil cylinder (5), the sensor assembly is installed at preset extension length and retraction length positions of the pumping left oil cylinder (4) and the pumping right oil cylinder (5), and control signals are transmitted to the pumping control valve block (3) according to position information of piston rods of the pumping left oil cylinder (, and then the pumping left oil cylinder (4) and the pumping right oil cylinder (5) are controlled to realize the uninterrupted pumping reciprocating process.
2. The wet-jet trolley pumping hydraulic control system as claimed in claim 1, wherein the pumping control valve block (3) comprises a direct-acting overflow valve, a pilot overflow valve (13) and a state control solenoid valve (16), an oil inlet of the direct-acting overflow valve and an oil inlet of the pilot overflow valve (13) are connected with an oil inlet pipeline of the pumping control valve block (3), oil outlets of the direct-acting overflow valve, the pilot overflow valve (13) and the state control solenoid valve (16) are connected with an oil outlet of the pumping control valve block (3), and the hydraulic oil flow direction of the pumping control valve block (3) is regulated according to an electric control signal of the state control solenoid valve (16) so as to control the operation state of the pumping system.
3. The wet-jet trolley pumping hydraulic control system is characterized in that an oil inlet of the direct-acting overflow valve (12) is connected with a spring control oil port of a pilot overflow valve (13), and the spring control oil port of the direct-acting overflow valve (12) is connected with an oil inlet of a state control solenoid valve (16) and used for controlling the on-off of a spring control oil path of the direct-acting overflow valve (12) by the state control solenoid valve (16); the hydraulic control oil port of the direct-acting overflow valve (12) and the pilot overflow valve (13) is connected with the oil inlet of the pumping control valve block (3) and used for controlling the pressure of the oil inlet of the pumping control valve block (3) through the direct-acting overflow valve (12).
4. The hydraulic control system for wet-jet trolley pumping according to claim 2, characterized in that the pumping control valve block (3) further comprises a spring-return double-acting solenoid valve (14), a spring-return hydraulic valve (15); the oil inlet of the pumping control valve block (3) is connected with the oil inlets of the spring reset double-acting electromagnetic valve (14) and the spring reset hydraulic valve (15) respectively, the oil outlet of the pumping control valve block (3) is connected with the oil outlets of the spring reset double-acting electromagnetic valve (14) and the spring reset hydraulic valve (15) respectively, a first driving oil port and a second driving oil port of the spring reset hydraulic valve (15) are connected with the pumping left oil cylinder (4) and the pumping right oil cylinder (5) respectively, and the pumping left oil cylinder (4) and the pumping right oil cylinder (5) are driven to pump according to the control action of the spring reset double-acting electromagnetic valve (14) and the spring reset hydraulic valve (15).
5. The wet-jet trolley pumping hydraulic control system is characterized in that a first driving oil port of the spring-return double-acting solenoid valve (14) is connected with a left station control oil port of the spring-return hydraulic valve (15), and a second driving oil port of the spring-return double-acting solenoid valve (14) is connected with a right station control oil port of the spring-return hydraulic valve (15) so that the spring-return double-acting solenoid valve (14) controls the action execution of the spring-return hydraulic valve (15).
6. The wet-spraying trolley pumping hydraulic control system as claimed in claim 1, further comprising an automatic oil discharge control valve block (10), wherein an oil inlet of the automatic oil discharge valve block is connected with an oil port of the pumping left oil cylinder (4) and an oil port of the pumping right oil cylinder (5), and an oil outlet of the automatic oil discharge control valve block (10) is connected with an oil tank through an oil discharge ball valve (11) to discharge hydraulic oil in rod cavities of the pumping left oil cylinder (4) and the pumping right oil cylinder (5), so as to ensure stability of the pumping system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812397.XA CN111810474B (en) | 2020-08-13 | 2020-08-13 | Wet-spraying trolley pumping hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812397.XA CN111810474B (en) | 2020-08-13 | 2020-08-13 | Wet-spraying trolley pumping hydraulic control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111810474A true CN111810474A (en) | 2020-10-23 |
| CN111810474B CN111810474B (en) | 2024-07-30 |
Family
ID=72860229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010812397.XA Active CN111810474B (en) | 2020-08-13 | 2020-08-13 | Wet-spraying trolley pumping hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111810474B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050232069A1 (en) * | 2004-04-19 | 2005-10-20 | Dns Co., Ltd. | Concrete-mortar transfer system of concrete pump car |
| US20140079560A1 (en) * | 2012-09-14 | 2014-03-20 | Chris Hodges | Hydraulic oil well pumping system, and method for pumping hydrocarbon fluids from a wellbore |
| CN203548390U (en) * | 2013-09-24 | 2014-04-16 | 三一汽车制造有限公司 | Hydraulic pumping system and concrete pumping equipment |
| CN104196786A (en) * | 2014-07-29 | 2014-12-10 | 徐州五洋科技股份有限公司 | Full-hydraulic control pumping hydraulic system used for wet spraying machine for mining |
| CN105275899A (en) * | 2014-07-24 | 2016-01-27 | 中联重科股份有限公司 | Hydraulic system of concrete pumping equipment and concrete pumping equipment |
| CN106151135A (en) * | 2015-04-27 | 2016-11-23 | 中联重科股份有限公司 | Concrete pumping hydraulic control system and concrete pumping machine |
| CN216666062U (en) * | 2020-08-13 | 2022-06-03 | 四川新筑智能工程装备制造有限公司 | Wet spraying trolley pumping hydraulic control system |
-
2020
- 2020-08-13 CN CN202010812397.XA patent/CN111810474B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050232069A1 (en) * | 2004-04-19 | 2005-10-20 | Dns Co., Ltd. | Concrete-mortar transfer system of concrete pump car |
| US20140079560A1 (en) * | 2012-09-14 | 2014-03-20 | Chris Hodges | Hydraulic oil well pumping system, and method for pumping hydrocarbon fluids from a wellbore |
| CN203548390U (en) * | 2013-09-24 | 2014-04-16 | 三一汽车制造有限公司 | Hydraulic pumping system and concrete pumping equipment |
| CN105275899A (en) * | 2014-07-24 | 2016-01-27 | 中联重科股份有限公司 | Hydraulic system of concrete pumping equipment and concrete pumping equipment |
| CN104196786A (en) * | 2014-07-29 | 2014-12-10 | 徐州五洋科技股份有限公司 | Full-hydraulic control pumping hydraulic system used for wet spraying machine for mining |
| CN106151135A (en) * | 2015-04-27 | 2016-11-23 | 中联重科股份有限公司 | Concrete pumping hydraulic control system and concrete pumping machine |
| CN216666062U (en) * | 2020-08-13 | 2022-06-03 | 四川新筑智能工程装备制造有限公司 | Wet spraying trolley pumping hydraulic control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111810474B (en) | 2024-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105156391A (en) | Composite variable pump and hydraulic control system using composite variable pump | |
| CA2879202C (en) | Hydraulic system for construction machine | |
| CN216666062U (en) | Wet spraying trolley pumping hydraulic control system | |
| CN202833008U (en) | Concrete pump and hydraulic system thereof | |
| CN203428881U (en) | Hydraulic control system of arm support or ladder frame | |
| CN203532386U (en) | Pump truck and boom hydraulic system thereof | |
| CN101280783A (en) | Multipurpose intelligent water pump controller | |
| CN111810474A (en) | Wet spraying trolley pumping hydraulic control system | |
| CN102322454B (en) | Concrete pumping equipment and hydraulic system thereof | |
| CN203948359U (en) | Hydraulic system of engineering machinery and engineering machinery | |
| CN112297985B (en) | Hydraulic lifting control device and method, storage medium and engineering vehicle | |
| CN113404730B (en) | Steering system of electric loader based on hydraulic accumulator and variable motor | |
| CN112032133B (en) | Hydraulic control system and work vehicle | |
| CN214460795U (en) | Digital hydraulic intelligent control system and excavator | |
| CN216478127U (en) | Pressure maintaining loop integrated valve block | |
| CN102423521A (en) | Fire extinguishing system and fire engine containing the same | |
| CN111734700A (en) | Engineering machine, hydraulic system and control method thereof | |
| CN109812615A (en) | A kind of regulating valve system and method with energy regeneration function | |
| CN107387360A (en) | A kind of plunger pump water system and its control method | |
| CN113586532B (en) | Construction machine | |
| CN217271091U (en) | Concrete pumping hydraulic control system | |
| CN216788860U (en) | Hydraulic valve group for controlling travel limit of mechanism | |
| CN212297075U (en) | Engineering machinery and hydraulic system | |
| CN204239360U (en) | Starting load reduction type hydraulic system and engineering machinery | |
| CN114087249B (en) | Electrohydraulic pressure control system and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |