CN111810474B - Wet-spraying trolley pumping hydraulic control system - Google Patents
Wet-spraying trolley pumping hydraulic control system Download PDFInfo
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- CN111810474B CN111810474B CN202010812397.XA CN202010812397A CN111810474B CN 111810474 B CN111810474 B CN 111810474B CN 202010812397 A CN202010812397 A CN 202010812397A CN 111810474 B CN111810474 B CN 111810474B
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- 238000005086 pumping Methods 0.000 title claims abstract description 205
- 238000005507 spraying Methods 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 258
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 41
- 238000007599 discharging Methods 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 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
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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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
- 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
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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 pumping hydraulic control system of a wet spraying trolley, which comprises the following components: the device comprises an alternating current motor (1), a constant-power open 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 of piston rod stroke and productivity reduction caused by the increase of the closed volume of the rod cavity of the hydraulic oil cylinder due to the problems of internal leakage of hydraulic oil and the like are solved; the wet spraying trolley has the advantages of low flow and low pressure waiting state, energy conservation, reduced system heating and good economy; the hydraulic oil exchange and replacement problems of the pumping oil cylinder with the rod closed cavity are solved; the pressure transmitter calibration device aims at solving the technical problems of large calibration workload, large personnel cost and large calibration efficiency difference of the pressure transmitter in the prior art.
Description
Technical Field
The invention relates to the technical field of wet spraying machines, in particular to a pumping hydraulic control system of a wet spraying trolley.
Background
The concrete pumping hydraulic control system is a control system suitable for concrete pumping machinery, and aims at solving the problems that how to wait for material energy conservation, reduce the heating of the hydraulic control system and solve the problems that the pumping stroke and the productivity are reduced due to the increase of the hydraulic volume of a closed cavity caused by internal leakage of a pumping oil cylinder and the like according to the construction working condition of a wet-spraying trolley. The hydraulic control system provided by the patent has more economical efficiency and practicability. Therefore, how to improve the economical efficiency and the practicability of the hydraulic control system is a technical problem to be solved.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing 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, a closed volume of a rod cavity is increased due to the problems of internal leakage of hydraulic oil and the like of a hydraulic oil cylinder, so that the stroke and the productivity of a piston rod are reduced.
To achieve the above object, the present invention provides a pumping hydraulic control system of a wet spraying trolley, the pumping hydraulic control system comprising: the pumping control device comprises an alternating current motor, a constant-power open pump assembly, a pumping control valve block, a pumping left cylinder, a pumping right 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 cylinder and a rodless cavity oil port of the pumping right cylinder, the sensor assembly is installed at preset extension length and retraction length of the pumping left cylinder and the pumping right cylinder, and control signals are transmitted to the pumping control valve block according to position information of piston rods of the pumping left cylinder and the pumping right cylinder, which are collected by the sensor assembly, so that the pumping left cylinder and the pumping right cylinder are controlled to realize uninterrupted pumping reciprocating process.
Preferably, the pumping control valve block comprises a direct-acting overflow valve, a pilot overflow valve and a state control electromagnetic valve, 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 electromagnetic valve are connected with an oil outlet of the pumping control valve block, and the operation state of the pumping control valve block is controlled by regulating and controlling the flow direction of hydraulic oil according to an electric control signal of the state control electromagnetic valve.
Preferably, the hydraulic pumping control system of the wet spraying trolley is characterized in that 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 electromagnetic valve and used for controlling the on-off of a spring control oil path of the direct-acting overflow valve through the state control electromagnetic valve; the hydraulic control oil ports of the direct-acting overflow valve and the pilot overflow valve are 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 further comprises a spring return double-acting electromagnetic valve and a spring return hydraulic valve; the oil inlets of the pumping control valve blocks are respectively connected with oil inlets of the spring return double-acting electromagnetic valve and the spring return hydraulic valve, oil outlets of the pumping control valve blocks are respectively connected with oil outlets of the spring return double-acting electromagnetic valve and the spring return hydraulic valve, a first driving oil port and a second driving oil port of the spring return 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 actions of the spring return double-acting electromagnetic valve and the spring return hydraulic valve.
Preferably, the first driving oil port of the spring return double-acting electromagnetic valve is connected with the left station control oil port of the spring return hydraulic valve, and the second driving oil port of the spring return double-acting electromagnetic valve is connected with the right station control oil port of the spring return hydraulic valve, so that the spring return double-acting electromagnetic valve is used for controlling the action execution of the spring return hydraulic valve.
Preferably, the pumping hydraulic control system of the wet spraying trolley further comprises an automatic oil discharging control valve block, an oil inlet of the automatic oil discharging valve block is connected with an oil communicating port of the pumping left oil cylinder and the pumping right oil cylinder, and an oil outlet of the automatic oil discharging control valve block is connected with an oil tank through an oil discharging ball valve and is used for discharging hydraulic oil in rod cavities of the pumping left oil cylinder and the pumping right oil cylinder, so that the pumping system is ensured to be stable.
According to the invention, the problems of piston rod stroke and productivity reduction caused by the increase of the closed volume of the rod cavity of the hydraulic oil cylinder due to the problems of internal leakage of hydraulic oil and the like are solved; the wet spraying trolley has the advantages of low flow and low pressure waiting state, energy conservation, reduced system heating and good economy; the hydraulic oil exchange and replacement problems of the pumping oil cylinder with the rod closed cavity are solved; the pressure transmitter calibration device aims at solving the technical problems of large calibration workload, large personnel cost and large calibration efficiency difference of the pressure transmitter in the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a hydraulic pumping control system of a wet spraying trolley according to the present invention;
Fig. 2 is a schematic diagram of a hydraulic oil change state of a pumping cylinder of the wet spraying trolley pumping hydraulic control system;
Reference numerals illustrate:
1-an alternating current motor; 2-constant power open pump assembly; 3-a pumping control valve block; 4-pumping a left oil cylinder; 5-pumping a right oil cylinder; 6-a first sensor; 7-a second sensor; 8-a third sensor; 9-fourth sensor; 10-an automatic oil discharge control valve block; 11-an oil drain ball valve; 12-a direct-acting overflow valve; 13-a pilot relief valve; 14-spring return double-acting solenoid valve; 15-spring return hydraulic valve; 16-state control solenoid valve.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.
The invention provides an embodiment, referring to fig. 1, fig. 1 is a schematic circuit diagram of a pumping hydraulic control system of a wet spraying trolley.
As shown in fig. 1, in the present embodiment, a wet spray carriage pumping hydraulic control system includes: the pumping control system comprises an alternating current motor 1, a constant-power open pump assembly 2, a pumping control valve block 3, a pumping left cylinder 4, a pumping right cylinder 5 and a sensor assembly, wherein an oil inlet pipeline of the constant-power open 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 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 cylinder 4 and a rodless cavity oil port of the pumping right cylinder 5, the sensor assembly is arranged at preset extension length and retraction length of the pumping left cylinder 4 and the pumping right cylinder 5, and a control signal is transmitted to the pumping control valve block 3 according to position information of piston rods of the pumping left cylinder 4 and the pumping right cylinder 5 collected by the sensor assembly, so that the pumping left cylinder 4 and the pumping right cylinder 5 are controlled to realize uninterrupted pumping reciprocating process.
The pumping control valve block 3 comprises a direct-acting overflow valve, a pilot overflow valve 13 and a state control electromagnetic valve 16, wherein 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 electromagnetic 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 and controlled according to an electric control signal of the state control electromagnetic valve 16 so as to control the running state of a pumping system.
The oil inlet of the direct-acting 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-acting overflow valve 12 is connected with an oil inlet of the state control electromagnetic 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 electromagnetic valve 16; 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 are used for controlling the pressure of the oil inlet of the pumping control valve block 3 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; the oil inlets of the pumping control valve block 3 are respectively connected with the oil inlets of the spring return double-acting electromagnetic valve 14 and the spring return hydraulic valve 15, the oil outlets of the pumping control valve block 3 are respectively connected with the oil outlets of the spring return double-acting electromagnetic valve 14 and the spring return hydraulic valve 15, the first driving oil port and the second driving oil port of the spring return hydraulic valve 15 are respectively connected with the pumping left oil cylinder 4 and the pumping right oil cylinder 5, and the pumping action of the pumping left oil cylinder 4 and the pumping right oil cylinder 5 is driven according to the control actions of the spring return double-acting electromagnetic valve 14 and the spring return hydraulic valve 15.
The first driving oil port of the spring return double-acting electromagnetic valve 14 is connected with the left station control oil port of the spring return hydraulic valve 15, and the second driving oil port of the spring return double-acting electromagnetic valve 14 is connected with the right station control oil port of the spring return hydraulic valve 15, so that the spring return double-acting electromagnetic valve 14 is used for controlling 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 communicating port of 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 is 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 pumping system is ensured to be stable.
To further achieve the above object, the operation principle of the control system of the present embodiment will be described in detail, specifically:
As shown in FIG. 1, the invention provides a scheme of a concrete pumping control system and a concrete pumping control machine, wherein the concrete pumping control system is safe and reliable when in operation, and the stability of the concrete pumping machine is greatly improved when in operation.
The oil outlet port B of the constant-power open pump 2 is connected with the oil inlet port P of the pumping control valve block 3; the oil inlet P of the pumping control valve block is communicated with the oil inlets of the direct-acting overflow valve 12 and the pilot overflow valve 13, the oil inlet of the direct-acting overflow valve 12 is communicated with the spring control oil inlet of the pilot overflow valve 13, the spring control oil inlet of the direct-acting overflow valve 12 is communicated with the oil inlet of the state control electromagnetic valve 16, the oil outlets of the direct-acting overflow valve 12, the pilot overflow valve 13 and the electromagnetic valve 16 are communicated with the oil outlet T of the pumping control valve block, and the hydraulic control oil inlets of the direct-acting overflow valve 12 and the pilot overflow valve 13 are communicated with the oil inlet P of the pumping control valve block; the pressure of an oil inlet P of the pumping control valve block 3 is controlled by the direct-acting overflow valve 12, the on-off of a spring control oil way of the direct-acting overflow valve 12 is controlled by the electromagnetic valve 16, when an 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 a role in unloading, hydraulic oil at the oil inlet P of the pumping control valve block flows to an oil outlet T of the pumping control valve block directly through the spring control oil way of the direct-acting overflow valve, so that the hydraulic oil flows into an oil tank, and the constant-power open pump is in a no-load low-flow running state at the moment.
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 together to play a role in regulating pressure, and the pressure at the port P of the oil inlet is the preset pressure of the direct-acting overflow valve 12. The oil inlet P of the pumping control valve block is respectively communicated with the oil inlets P of the spring return double-acting electromagnetic valve 14 and the spring return hydraulic valve 15, and the oil outlet T of the pumping control valve block is respectively communicated with the oil outlets T of the spring return double-acting electromagnetic valve 14 and the spring return hydraulic valve 15; the opening A of the spring return double-acting electromagnetic valve 14 is communicated with a left station control oil port of the spring return hydraulic valve, and the opening B of the spring return double-acting electromagnetic valve 14 is communicated with a right station control oil port of the spring return hydraulic valve; the opening A of the spring reset hydraulic valve is communicated with the rodless cavity oil port of the pumping left oil cylinder 4, and the opening B of the spring reset hydraulic valve is communicated with the rodless cavity oil port of the pumping right oil cylinder 5; the oil ports of the rod cavities of the pumping left oil cylinder 4 and the pumping right oil cylinder 5 are communicated with each other and are communicated with an oil inlet P of the automatic oil discharge valve block at the same time; an oil outlet T port of the automatic oil discharge control valve block is communicated with a B port of the automatic oil discharge control valve block and an oil tank, and an A port of the automatic oil discharge control valve block is communicated with a ball valve 11.
The first sensor 6, the third sensor 8, the second sensor 7 and the fourth sensor 9 are respectively arranged at preset extension length and retraction length of the pumping left cylinder 4 and the pumping right cylinder 5.
The hydraulic oil flows from the port P to the ports P of the oil inlets of the spring return double-acting electromagnetic valve 14 and the spring return hydraulic valve 15 respectively, and at this time, the spring return double-acting electromagnetic valve 14 and the spring return hydraulic valve 15 are both in a middle working position state, and a hydraulic oil pumping cylinder at the port P of the oil inlet of the pumping control valve block does not act. The pressure of the hydraulic oil at the port P of the oil inlet of the pumping control valve block 3 is continuously increased along with the pumping of the hydraulic pump until the pressure of the hydraulic control oil way of the pilot relief valve 13 exceeds the preset pressure of the direct-acting relief valve 12, and the hydraulic oil flows to the port T of the pumping control valve through the pilot relief valve, so that the hydraulic oil flows to an oil tank and has a pressure stabilizing effect.
The electromagnet DT1 at the left end of the spring-return double-acting electromagnetic valve 14 is provided with an electric signal through a pumping start button, so that the electromagnet DT1 is in a left station state, at the moment, the spring-return double-acting electromagnetic valve 14 controls hydraulic oil to enter from a left control oil port of the spring-return hydraulic valve 15 and flow out from a right control oil port of the spring-return hydraulic valve, at the moment, the spring-return 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 controlled to extend, the hydraulic oil is controlled to flow out of the rodless cavity of the pumping left oil cylinder 4, and the piston rod of the pumping right oil cylinder is controlled to retract. 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 electromagnet DT2 at the right end of the spring-return double-acting electromagnetic valve to enable the electromagnet DT2 to be in a right station state, at the moment, the spring-return double-acting electromagnetic valve 14 controls hydraulic oil to enter from a right control oil port of the spring-return hydraulic valve 15 and flow out from a left control oil port of the spring-return hydraulic valve, at the moment, the spring-return 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, and controls the hydraulic oil to flow out of the rodless cavity of the pumping right oil cylinder 5 to enable the piston rod of the pumping right oil cylinder to retract. 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 this time, the second sensor 7 gives an electric signal to the electromagnet at the left end of the spring reset double-acting electromagnetic valve, and the pumping left cylinder 4 and the pumping right cylinder 5 repeat the above actions and always circulate and reciprocate, so that the pumping system is ensured to pump continuously until the pumping start button is reset and stopped.
In the whole process of normal operation of the pumping cylinder, the automatic oil discharge control valve block is always in a middle working position state, at the moment, rod cavities of the pumping left cylinder 4 and the pumping right cylinder 5 become closed cavities, and in the process of operation, the closed cavity volume is increased to shorten the stroke of a piston rod possibly due to internal leakage of hydraulic oil, so that whether oil discharge is performed is controlled by controlling signal on-off of an electromagnet DT4 at the left end of the pumping valve block through a program in order to avoid the situation. Setting that when the pumping left cylinder 4 and the pumping right cylinder 5 work normally, namely the third sensor 8 and the second sensor 7 have signals at the same time and the first sensor 6 and the fourth sensor 9 have signals at the same time or the first sensor 6 and the fourth sensor 9 have signals at the same time and the third sensor 8 and the second sensor 7 have signals at the same time or the four sensors have signals at the same time, three conditions are normal, namely the electromagnet DT4 at the left end of the automatic oil discharge valve block is not electrified under normal conditions, the electromagnet is in a neutral state, and a rod cavity of the two pumping cylinders forms 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 a rod cavity with an increased volume and the stroke of a piston rod 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 a rod cavity with an increased volume and the piston rod is shortened) are set as abnormal conditions, at the moment, the left electromagnet DT4 of the automatic oil discharging control valve block is electrified, is in a left station state, and controls the pumping left oil cylinder 4 and the pumping right oil cylinder 5 to have rod cavities to be communicated with an oil tank, and redundant hydraulic oil in the rod cavities is discharged until the stroke of the piston rod is recovered to be normal, so that the pumping system is ensured to stably pump concrete.
Because the inner wall of the pumping cylinder is contacted with water, the phenomenon that the hydraulic oil is mixed with water in a small amount to generate emulsification is unavoidable, and the hydraulic oil in the rodless cavity is difficult to emulsify because the hydraulic oil circulates in the whole hydraulic system and moisture is not easy to remain; the rod cavity can form a closed cavity during working, so that the water in the cavity is not easy to discharge, and the emulsification phenomenon is very easy to generate, and therefore, the hydraulic oil in the rod cavity needs to be periodically discharged and new hydraulic oil is injected. At the moment, emulsified hydraulic oil can be discharged only by providing an electric signal for the electromagnet DT3 at the right end of the automatic oil discharge control valve block and simultaneously opening the oil discharge ball valve 11; when oil discharge is completed, the action state of the pumping oil cylinder is shown in figure 2, at the moment, the electromagnet DT3 at the fast right end of the automatic oil discharge control valve is disconnected to enable the electromagnet DT3 to be in a middle working position state, the sensor is closed, then only an electric signal is needed to be given to the right end of the spring reset double-acting electromagnetic valve through a pumping start button, so that hydraulic oil is injected into a rodless cavity of the pumping right oil cylinder 5, hydraulic oil in the rodless cavity of the pumping right oil cylinder 5 is injected into a rod cavity of the pumping right oil cylinder through a single throttle valve, and the pumping left oil cylinder 4 is provided with a rod cavity, and the sensor is started after the pumping right oil cylinder is full, so that the working can be restarted.
In the embodiment, the problems 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, so that the stroke and the productivity of a piston rod are reduced are solved; the wet spraying trolley has the advantages of low flow and low pressure waiting state, energy conservation, reduced system heating and good economy; the hydraulic oil exchange and replacement problems of the pumping oil cylinder with the rod closed cavity are solved; the pressure transmitter calibration device aims at solving the technical problems of large calibration workload, large personnel cost and large calibration efficiency difference of the pressure transmitter in the prior art.
The method, system and module disclosed in the invention can be realized in other modes. For example, the embodiments described above are merely illustrative, and for example, the division of the modules may be merely a logical functional division, and there may be additional divisions when actually implemented, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with respect to each other may be said to be through some interface, indirect coupling or communication connection of systems or modules, which may be in electrical, mechanical, or other form.
The modules illustrated as discrete components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the solution purpose of this embodiment.
In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (2)
1. A wet spray trolley pumping hydraulic control system, the pumping hydraulic control system comprising: the pumping control device comprises an alternating current motor (1), a constant-power open 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 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 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 arranged at preset extending length and retracting length of the pumping left oil cylinder (4) and the pumping right oil cylinder (5), and a control signal is transmitted to the pumping control valve block (3) according to position information of piston rods of the pumping left oil cylinder (4) and the pumping right oil cylinder (5) collected by the sensor assembly, and then the pumping left oil cylinder (4) and the pumping right oil cylinder (5) are controlled to realize a continuous pumping reciprocating process;
The pumping control valve block (3) comprises a direct-acting overflow valve, a pilot overflow valve (13) and a state control electromagnetic valve (16), wherein 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 electromagnetic 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 and controlled according to an electric control signal of the state control electromagnetic valve (16) so as to control the running state of a pumping system; the oil inlet of the direct-acting 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-acting overflow valve (12) is connected with an oil inlet of the state control electromagnetic 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 electromagnetic valve (16); 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 used for controlling the pressure of the oil inlet of the pumping control valve block (3) by the direct-acting overflow valve (12); the pumping control valve block (3) further comprises a spring return double-acting electromagnetic valve (14) and a spring return hydraulic valve (15); the oil inlets of the pumping control valve block (3) are respectively connected with the oil inlets of the spring return double-acting electromagnetic valve (14) and the spring return hydraulic valve (15), the oil outlets of the pumping control valve block (3) are respectively connected with the oil outlets of the spring return double-acting electromagnetic valve (14) and the spring return hydraulic valve (15), the first driving oil port and the second driving oil port of the spring return hydraulic valve (15) are respectively connected with the pumping left oil cylinder (4) and the pumping right oil cylinder (5), and the pumping left oil cylinder (4) and the pumping right oil cylinder (5) are driven to perform pumping according to the control actions of the spring return double-acting electromagnetic valve (14) and the spring return hydraulic valve (15);
The pumping hydraulic control system further comprises an automatic oil discharging control valve block (10), an oil inlet of the automatic oil discharging control valve block (10) is connected with an oil communicating port of the pumping left oil cylinder (4) and the pumping right oil cylinder (5), an oil outlet of the automatic oil discharging control valve block (10) is connected with an oil tank through an oil discharging ball valve (11) and is used for discharging hydraulic oil in rod cavities of the pumping left oil cylinder (4) and the pumping right oil cylinder (5) and guaranteeing stability of the pumping system;
An oil inlet P port of the pumping control valve block (3) is respectively communicated with oil inlet P ports of the spring return double-acting electromagnetic valve (14) and the spring return hydraulic valve (15), and an oil outlet T port of the pumping control valve block (3) is respectively communicated with oil outlet T ports of the spring return double-acting electromagnetic valve (14) and the spring return hydraulic valve (15); the A port of the spring return double-acting electromagnetic valve (14) is communicated with a left station control oil port of the spring return hydraulic valve, and the B port of the spring return double-acting electromagnetic valve (14) is communicated with a right station control oil port of the spring return hydraulic valve; the A port of the spring reset hydraulic valve (15) is communicated with a rodless cavity oil port of the pumping left oil cylinder (4), and the B port of the spring reset hydraulic valve (15) is communicated with a rodless cavity oil port of the pumping right oil cylinder (5); the oil ports of the rod cavities of the pumping left oil cylinder (4) and the pumping right oil cylinder (5) are communicated with each other and are communicated with an oil inlet P of an automatic oil discharge control valve block (10) at the same time; an oil outlet T port of the automatic oil discharge control valve block (10) is communicated with an oil tank and a B port thereof, and an A port thereof is communicated with a ball valve (11).
2. A wet-spraying trolley pumping hydraulic control system according to claim 1, characterized in that a first driving oil port of the spring-return double-acting electromagnetic 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 electromagnetic 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 electromagnetic valve (14) controls the action execution of the spring-return hydraulic valve (15).
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| 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 |
| CN105275899B (en) * | 2014-07-24 | 2017-11-21 | 中联重科股份有限公司 | Hydraulic system of concrete pumping equipment and concrete pumping equipment |
| CN104196786B (en) * | 2014-07-29 | 2017-06-20 | 徐州五洋科技股份有限公司 | A kind of all-hydraulic control hydraulic system of pump of mining wet sprayer |
| CN106151135B (en) * | 2015-04-27 | 2018-09-28 | 中联重科股份有限公司 | Concrete pumping hydraulic control system and concrete pumping machine |
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