CN216429648U - Positive flow constant pressure fully-mechanized mining pump control system - Google Patents
Positive flow constant pressure fully-mechanized mining pump control system Download PDFInfo
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- CN216429648U CN216429648U CN202123435514.4U CN202123435514U CN216429648U CN 216429648 U CN216429648 U CN 216429648U CN 202123435514 U CN202123435514 U CN 202123435514U CN 216429648 U CN216429648 U CN 216429648U
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Abstract
The utility model discloses a positive flow constant pressure fully-mechanized mining pump control system, which comprises a hydraulic support electrohydraulic control system upper computer, a pump station controller, a plurality of support controllers, a hydraulic support and a variable frequency pump station for providing power source for the hydraulic support; the hydraulic support electrohydraulic control system upper computer is respectively connected with the pump station controller and the support controller, and the pump station controller is connected with the pressure sensor; the pump control system collects a control command sent by the support controller through an upper computer of the hydraulic support electrohydraulic control system, calculates the total flow demand of the current working face and transmits the total flow demand to the pump station controller; and the pump station controller controls the variable frequency pump in the variable frequency pump station to regulate the flow according to the total demand. The utility model discloses a positive flow control that the system supplied liquid, signal transmission delay have solved the timeliness problem of system response in 100ms, make the pump station supply liquid and support flow demand fully match, avoid the electromagnetism uninstallation valve frequently to open the excess control who stops and the frequency conversion, have realized energy-conservation effectively.
Description
Technical Field
The utility model belongs to the technical field of pump station control, in particular to positive flow constant voltage is combined and is adopted pump control system.
Background
In the comprehensive mechanical coal mining working face of a coal mine, a hydraulic support group (generally consisting of 100 to 200 left and right independent hydraulic supports) is matched with a coal mining machine to complete the support of the coal mining face, the hydraulic support group is important equipment for protecting personnel and equipment safety of a stope and realizing continuous coal mining, and an emulsion pump station provides a constant-pressure power source for the hydraulic support group. At present, an emulsion pump station of a fully mechanized mining face generally comprises 2-3 quantitative pump units with the flow of 400L/min, and one or more pumps are manually or automatically started according to the pressure change of an outlet of the pump station to realize constant-pressure liquid supply of the pump station. In order to ensure that the flow of the support is sufficient, the pump stations are supplied in a saturated mode, and redundant flow is unloaded through the pressure unloading valve, so that great energy waste is caused.
In order to achieve the purpose of energy conservation, two modes are mainly adopted at present, wherein the first mode is an electromagnetic unloading valve overflow mode, the second mode is a variable frequency motor to achieve variable frequency regulation of the discharge capacity of a pump, but control signals of the two modes are that the pressure value of the outlet of a pump station is adopted, for example, the pressure value exceeds 31.5MPa, the electromagnetic unloading valve is opened or the variable frequency motor slows down the rotating speed to achieve reduction of the output flow of the pump station, and the two modes can reduce certain energy waste compared with the traditional mechanical unloading valve. However, the coal face support and the pump station are generally spaced by hundreds of meters to thousands of meters, pressure change of a liquid supply pipe is caused after the support oil cylinder acts and is transmitted to the outlet pressure change of the pump station, long time is needed, generally more than tens of seconds is needed, after the pump station controls an electromagnetic unloading valve or frequency conversion according to the pressure value, when the flow change of the pump station acts on the face support again, the response time is more than one minute, the flow and pressure control is seriously lagged, and the problems of insufficient flow supply when large flow is needed often occur, the quick movement of the support in the face is influenced, the roof support safety is caused, and the production efficiency is reduced. And secondly, because the response is not timely, the unloading valve needs to be opened and closed frequently, the energy-saving effect is not obvious, and the defects of large pressure fluctuation of a pump station system and the like exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, a positive flow constant voltage is synthesized and is adopted pump control system is provided, the control signal of pump station adopts support electric hydraulic control system's controller control signal, the positive flow control that the system supplied liquid has been realized, signal transmission delays in 100ms, the system response timeliness problem has been solved, make the pump station supply liquid and support flow demand fully match, avoid the electromagnetism uninstallation valve frequently to open and stop the excess regulation with the frequency conversion, energy-conservation has been realized effectively.
The purpose of the utility model is realized through the following technical scheme: a positive flow constant pressure fully-mechanized mining pump control system comprises a hydraulic support electrohydraulic control system upper computer, a pump station controller, a plurality of support controllers, hydraulic supports corresponding to the support controllers one by one, and variable frequency pump stations connected with the hydraulic supports and providing power sources for the hydraulic supports; the variable frequency pump station is formed by connecting a plurality of variable frequency pumps, and a pressure sensor is arranged at the outlet of the variable frequency pump station;
the hydraulic support electrohydraulic control system upper computer is respectively connected with the pump station controller and the support controller, and the pump station controller is connected with the pressure sensor;
the pump control system collects control commands sent by the support controller through an upper computer of the hydraulic support electrohydraulic control system, sums and calculates the action quantity of all hydraulic supports of the working face and the flow demand of each function, calculates the total flow demand of the current working face and transmits the total demand to the pump station controller; and the pump station controller controls the variable frequency pump in the variable frequency pump station to regulate the flow according to the total demand.
The utility model has the advantages that: the control signal of the pump station adopts the controller control signal of the support electric hydraulic control system, so that the positive flow control of the system liquid supply is realized, the signal transmission delay is within 100ms, the problem of system response timeliness is solved, the liquid supply of the pump station is fully matched with the support flow demand, frequent start and stop of an electromagnetic unloading valve and frequency conversion excess regulation are avoided, the flow response of a coal mine fully-mechanized mining pump station system can be improved, the pressure fluctuation of the pump station system is reduced, the moving speed of a hydraulic support is accelerated, the energy consumption of the pump station is reduced, and the energy conservation and high efficiency are effectively realized.
Drawings
Fig. 1 is a structural block diagram of the positive flow constant pressure fully-mechanized coal mining pump control system of the utility model.
Detailed Description
The technical scheme of the utility model is further explained in the following with the attached drawings.
As shown in fig. 1, the positive flow constant pressure fully mechanized mining pump control system of the present invention comprises an upper computer of a hydraulic support electrohydraulic control system, a pump station controller, a plurality of support controllers, hydraulic supports corresponding to the support controllers one by one, and a variable frequency pump station connected with the hydraulic supports and providing a power source for the hydraulic supports; the variable frequency pump station is formed by connecting a plurality of variable frequency pumps, a pressure sensor is arranged at an outlet of the variable frequency pump station, and the variable frequency pump station provides a power source for the hydraulic support through a high-pressure hydraulic oil way;
the hydraulic support electrohydraulic control system upper computer is respectively connected with the pump station controller and the support controller through control signal passages, and the pump station controller is connected with the pressure sensor;
the pump control system collects control commands sent by the support controller through an upper computer of the hydraulic support electrohydraulic control system, sums and calculates the action quantity of all hydraulic supports of the working face and the flow demand of each function, calculates the total flow demand of the current working face and transmits the total demand to the pump station controller; and the pump station controller controls the variable frequency pump in the variable frequency pump station to regulate the flow according to the total demand.
Positive flow constant voltage fully mechanized mining pump control method, including following step:
s1, the bracket controller sends out a control signal to control the hydraulic bracket to act, and simultaneously, the control signal is fed back to an upper computer of the electro-hydraulic control system of the hydraulic bracket;
s2, the upper computer of the hydraulic support electrohydraulic control system carries out summation calculation, and the action quantity of all hydraulic supports on the working face and the total flow demand of each function are calculated; the total flow demand calculation method comprises the following steps: each support having a VColumn lifter、VStand column、VPush-slideAnd VPulling frameFour flow requirements; when a plurality of supports act, adding the requirements required by each support, and then adding the requirements of all the supports to obtain the total flow requirement;
s3, transmitting the total flow demand to a pump station controller, controlling a corresponding variable frequency pump by the pump station controller according to the total demand, realizing positive flow demand control of a pump station, installing a pressure sensor at the outlet of the pump station to realize constant pressure control of the pump station, wherein the constant pressure control is prior to the positive flow control, namely the control is carried out according to the positive flow in the constant pressure control pressure range; the specific implementation method comprises the following steps:
s31, presetting control priorities of all variable frequency pumps;
s32, adjusting the flow of the variable frequency pump from high to low according to the priority; the flow of the variable frequency pump is regulated within the constant pressure control range: in the flow regulation process, if the pressure collected by the pressure sensor is greater than a set value, the pump station is firstly subjected to pressure relief operation, and when the pressure is less than the set value, the flow regulation is carried out. According to the total flow demand requirement, the pressure of a pump station is set firstly, then the pump station is electrified to operate, a pressure sensor monitors the pressure of the pump station and converts the pressure into an electric signal to be fed back to a pump station controller, the pump station controller controls the operation of the variable frequency pump through analyzing and processing a feedback value and a set value, the variable frequency pump is subjected to flow regulation within a constant pressure control range, and the overpressure of the system can be avoided under the condition that the total flow demand is met. When the flow is increased, the system pressure is reduced, and the feedback value is smaller than the set value; when the flow rate is reduced, the rotating speed of the variable frequency pump is reduced.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (1)
1. A positive flow constant pressure fully-mechanized mining pump control system is characterized by comprising a hydraulic support electrohydraulic control system upper computer, a pump station controller, a plurality of support controllers, hydraulic supports in one-to-one correspondence with the support controllers, and variable frequency pump stations which are connected with the hydraulic supports and provide power sources for the hydraulic supports; the variable frequency pump station is formed by connecting a plurality of variable frequency pumps, and a pressure sensor is arranged at the outlet of the variable frequency pump station;
the hydraulic support electrohydraulic control system upper computer is respectively connected with the pump station controller and the support controller, and the pump station controller is connected with the pressure sensor;
the pump control system collects control commands sent by the support controller through an upper computer of the hydraulic support electrohydraulic control system, sums and calculates the action quantity of all hydraulic supports of the working face and the flow demand of each function, calculates the total flow demand of the current working face and transmits the total demand to the pump station controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123435514.4U CN216429648U (en) | 2021-12-30 | 2021-12-30 | Positive flow constant pressure fully-mechanized mining pump control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123435514.4U CN216429648U (en) | 2021-12-30 | 2021-12-30 | Positive flow constant pressure fully-mechanized mining pump control system |
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| Publication Number | Publication Date |
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| CN216429648U true CN216429648U (en) | 2022-05-03 |
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| CN202123435514.4U Active CN216429648U (en) | 2021-12-30 | 2021-12-30 | Positive flow constant pressure fully-mechanized mining pump control system |
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| Country | Link |
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| CN (1) | CN216429648U (en) |
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2021
- 2021-12-30 CN CN202123435514.4U patent/CN216429648U/en active Active
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