Hydraulic support system with pump station and working method of hydraulic support system
By bringing a pump station in each hydraulic bracket system, and synchronous control between the pump station and the hydraulic bracket is achieved through the local control system unit, the problem of untimely liquid supply and large loss along the route in traditional hydraulic bracket systems is solved, and the timely supply of hydraulic bracket liquid and the improvement of system efficiency is achieved.
Patent Information
- Application Number
- CN202411777382.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-02-28
AI Technical Summary
In traditional hydraulic support systems, the pump station is far away from the coal mining working surface, resulting in untimely liquid supply, high loss along the route, high cost, high equipment investment cost and difficult to repair.
The hydraulic support system with its own pump station is adopted. Each hydraulic support is supplied separately by a corresponding pump station. The local control system unit realizes synchronous control between the pump station and the hydraulic support, ensuring that the hydraulic support is supplied in time when it is automatically followed by the machine, and stops the supply of liquid at the end of the operation to save energy.
It realizes the timely supply of liquid for hydraulic support, reduces the loss along the route and equipment investment costs, improves the synchronization and efficiency of the system, and solves the problems of liquid supply delay and loss along the route in traditional systems.
Smart Images
Figure CN119531918A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of underground support, and in particular to a hydraulic support system with a pump station and a working method thereof. Background Art
[0002] At present, most of the hydraulic support systems of coal mining working faces in underground coal mines are centralized fluid supply support systems, that is, the pump station and other fluid supply system equipment are centralized in the chute or chamber of the coal mining working face, so as to realize the centralized fluid supply nearby or remote centralized fluid supply for the hydraulic support system. The main advantage of the hydraulic support system using this fluid supply method is that it is easy to control and manage; however, there are many outstanding problems with this hydraulic support system, the most prominent of which is that the pump station is far away from the coal mining working face. For example, the pump station is placed in the chute for centralized fluid supply nearby, and the hydraulic support system is far away from the coal mining working face. The distance between the pump station and the hydraulic support of the coal mining face is about 1000 to 5000 meters. The hydraulic support system not only brings the cost of laying the supply pipeline along the way (especially the long-distance centralized supply, which requires laying a large number of seamless steel pipes, which is more expensive), but also easily causes the loss of emulsified hydraulic pressure along the pipeline. That is, the resistance along the way from the pump station to the coal mining face causes the pressure at the end of the hydraulic support system to fail to meet the requirements of the initial support force of the hydraulic support of the coal mining face. At the same time, the above-mentioned traditional hydraulic support system will also cause untimely fluid supply to the hydraulic support due to the pump station being far away from the coal mining face, especially when the hydraulic support is automatically following the machine, it urgently needs high-pressure and large-flow emulsion, but because the pump station is far away from the coal mining face, it often causes delayed and insufficient fluid supply, resulting in the failure to meet the pressure and flow required by the hydraulic support; although the current hydraulic support system relies on the existing accumulator adjustment technology and inverter adjustment technology to solve the consequences of this problem to a certain extent, it still cannot keep pace with the actual fluid demand of the support, and cannot fundamentally solve the above series of problems. Therefore, the traditional hydraulic support system that uses centralized fluid supply from a pump station can no longer meet the demand for high-pressure and large-flow emulsion during coal mining, which has become a major pain point in the industry.
[0003] In addition, for remote centralized liquid supply, a large number of seamless steel pipes need to be laid along the way, which increases the investment cost. Moreover, the centralized liquid supply distance is long, many pipelines need to be laid, and the emulsion is not delivered in time. In order to ensure the cleanliness of the inlet and return emulsions, an inlet and return liquid filtration system equipment is also required, which further increases the investment equipment cost. Summary of the invention
[0004] The purpose of the present invention is to provide a hydraulic support system with a simple structure and a built-in pump station that can solve the above problems and its working method, in order to address the problems of high pipeline transportation cost, large loss along the way, untimely fluid supply, difficulty in maintenance, high equipment investment cost, etc. in the traditional hydraulic support system that currently adopts a centralized fluid supply method of a high-pressure and large-flow pump station in coal mines.
[0005] In order to achieve the above object, the technical solution of the present invention is: A hydraulic support system with its own pump station comprises a plurality of hydraulic supports for supporting, a plurality of pump stations for pumping emulsion for the hydraulic supports, a plurality of local control system units for monitoring and controlling the hydraulic supports and the corresponding pump stations, and a centralized control system unit for centrally managing the monitoring signals and control signals of the local control system units. The plurality of pump stations are arranged corresponding to the plurality of hydraulic supports and the pump stations are arranged at positions close to the corresponding hydraulic supports; the hydraulic supports are connected to the emulsion tank via the corresponding pump stations; the plurality of local control system units are arranged corresponding to the plurality of hydraulic supports and the plurality of pump stations connected to the hydraulic supports and monitor and control the supporting status of the corresponding hydraulic supports and the working status of the corresponding pump stations; the plurality of local control system units are connected to the centralized control system unit and transmit the monitoring and control signals of the hydraulic supports and the pump stations to the centralized control system unit.
[0006] Furthermore, one end of the pump station is connected to the emulsion tank via a liquid inlet pipeline, and the other end of the pump station is connected to the liquid inlet pipeline of the corresponding hydraulic support, and the return hole of the hydraulic support is connected to the emulsion tank via the liquid return pipeline.
[0007] Furthermore, the supporting states of the hydraulic support mainly include a column lowering state, a column raising state, a pushing state, a extending and retracting supporting column state, a stationary state, etc.
[0008] Furthermore, the working state of the pump station includes an opening and closing state and a monitoring state of oil temperature, oil pressure, oil level, and outlet pressure.
[0009] Furthermore, the local control system unit is connected to the emulsion tank and monitors the emulsion level in the emulsion tank.
[0010] Furthermore, the hydraulic support system also includes a ground monitoring system unit for ground personnel to remotely monitor the working status of the underground hydraulic support, the working status of the pump station and the liquid level of the emulsion tank and realize remote control. The ground monitoring system unit is connected to the centralized control system unit and realizes signal transmission operations.
[0011] A working method of a hydraulic support system with a self-contained pump station comprises the following steps: S1. During coal mining, the hydraulic support starts to follow the machine automatically, and the local control system unit controls the working state of the corresponding pump station according to the working state of the hydraulic support; S2. When the hydraulic support is in the pushing state or the column raising state, a large flow of emulsion is required. At this time, the outlet pressure of the pump station is in a reduced state. The local control system unit controls the pump station to operate at a high frequency to achieve the supply of a large flow of emulsion to meet the pushing and column raising actions of the hydraulic support; S3. When the hydraulic support is in the column lowering state and the side guarding state, a small flow of emulsion is required. At this time, the outlet pressure of the pump station is in the state of increasing and high-pressure maintenance. The local control system unit controls the pump station to operate at a low frequency to realize the supply of small flow of emulsion to meet the hydraulic support column lowering action and side guarding action; S4. When the hydraulic support is in a stationary state, the local control system unit controls the pump station to shut down, stops supplying fluid to the hydraulic support, and closes the hydraulic support's inlet and return fluid pipelines to maintain pressure, maintaining a static support state; S5. During the operation of the hydraulic support, the local control system unit keeps monitoring the oil temperature, oil pressure, oil level of the pump station and the emulsion level in the emulsion tank. When the oil temperature, oil pressure and oil level of the pump station are abnormal or the emulsion level in the emulsion tank is too low, an alarm will be triggered to prompt the maintenance personnel to perform maintenance on the pump station and emulsion tank.
[0012] Compared with the prior art, the present invention has the following advantages and positive effects: The present invention provides a hydraulic support system with a pump station, in which each hydraulic support in the system is supplied with liquid by a corresponding pump station alone. When the hydraulic support automatically follows the machine to perform lowering, moving and lifting actions, the pump station is synchronously turned on to supply liquid to the hydraulic support, thereby meeting the timely supply demand for liquid for the hydraulic support; at the same time, the pressure and flow rate of the emulsion output by the pump station can meet the supply requirements of the hydraulic support without loss along the way; and when the automatic following action of the hydraulic support ends, the pump station stops supplying liquid accordingly, so as to save energy and reduce consumption; In addition, the hydraulic support system with its own pump station adopts a unified local control system unit to achieve unified control of the pump station and the hydraulic support, thereby realizing the technical effect of automatic start and stop of the hydraulic support and synchronization of the start and stop of the pump station; at the same time, since the pump station is arranged nearby the hydraulic support, when the hydraulic support uses fluid under different working conditions, changes in pressure and flow demand will be transmitted to the pump station outlet in time. The local control system unit performs frequency conversion control on the pump station according to the timely monitored pump station outlet data, thereby achieving synchronization between the frequency conversion control of the pump station and the actual fluid use conditions of the hydraulic support.
[0013] On the other hand, an independent pump station is used to supply liquid to a single hydraulic support, thereby meeting the liquid demand of the single hydraulic support for automatic following action. The liquid supply is timely, reducing the cost of laying pipelines along the way, and solving a series of problems such as liquid pressure loss along the pipeline. In addition, since it is close to the hydraulic support, there is no need to lay long-distance transmission pipelines, and the filtering equipment provided by the hydraulic support can be used nearby for filtering operations, without the need for supporting emulsion support equipment, which further reduces the equipment cost and improves the use effect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0015] Figure 1 This is the schematic diagram of the hydraulic support system; Figure 2 This is the control logic diagram of the hydraulic support system; Figure 3 It is a monitoring diagram of the hydraulic support system; Figure 4 This is the frequency conversion control diagram of the hydraulic support system. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent substitutions, improvements, etc., should be included in the protection scope of the present invention.
[0017] like Figures 1 to 4 As shown, the present invention provides a hydraulic support system with a pump station P, which is mainly composed of a pump station P, a hydraulic support Z for a coal mining face, an emulsion tank X, a local control system unit C, a centralized control system unit J and a ground monitoring system unit D; The pumping stations P are P 1、 P1 to P n-1、 P n , together forming the fluid supply system of the hydraulic support system of the coal mining working face; The hydraulic support Z is Z 1、 Z2 to Z n-1、 Z n, together forming a hydraulic support system for coal mining working face, used for coal seam support in coal mining work; The local control system units are C 1、 C2 to C n-1、 C n , together they constitute the control system of the hydraulic support system of the coal mining working face, which is used to control and monitor the hydraulic support Z, pump station P and other equipment; The centralized control system unit J is mainly used to receive data uploaded by the series of local control system units C and perform remote monitoring, while monitoring and controlling the emulsion tank X; The ground monitoring system unit D is mainly used to receive data uploaded by the centralized control system unit J and display it in the ground dispatching room. It is used by ground personnel to remotely monitor the working status of the underground hydraulic support Z, pump station P and liquid tank X, and can realize remote control.
[0018] The above-mentioned hydraulic supports Z correspond to the pump stations P one by one and are placed together nearby. When mining coal, any one of the hydraulic supports Z starts to automatically follow the machine and perform lowering, moving and raising actions. At this time, the local control system unit C controls the pump station P to start, and the pump station P starts to supply liquid to the hydraulic support Z nearby and in a timely manner. Because the liquid inlet pipeline between the pump station and the support is short, the liquid supply is very timely, which realizes the rapid lowering, moving and raising action of the hydraulic support Z when automatically following the machine, and satisfies the timely and rapid automatic following of the hydraulic support; at the same time, the hydraulic support Z returns liquid to the emulsion tank X. Because it is arranged nearby, the return liquid pipeline is short, and the return liquid back pressure is very small, which can realize rapid liquid return, which is conducive to the lowering, moving and raising action of the support; then the pump station P extracts the emulsion and transports it to the hydraulic support, entering the next emulsion inlet and return liquid working cycle; During the automatic following process of the hydraulic support Z, since the inlet pipeline between the hydraulic support Z and the pump station P is short, the pump station P supplies liquid very timely, and the pressure loss of the inlet pipeline is very small, the outlet pressure of the liquid supply pipeline is basically constant, and the flow rate is continuously stable, which meets the constant pressure and timely liquid use requirements of the rapid lowering, moving and lifting actions of the hydraulic support Z of the coal mining face during automatic following; and the above-mentioned hydraulic support Z and the pump station P are placed nearby, and the inlet pipeline is short, so there is no need to arrange filtering equipment on the inlet pipeline, and the original filtering equipment on the hydraulic support Z can be used to filter the inlet liquid; in addition, the emulsion tank X is arranged nearby the hydraulic support Z, and the return liquid pipeline is also short, and the pump station P does not need to be equipped with return liquid filtering equipment on the return liquid pipeline.
[0019] In addition, the local control system unit C can also control the start and stop of the pump station P. When the hydraulic support Z automatically follows the machine, the column Z is lowered. 降 , Push Z 推 、Rising column Z 升When the hydraulic support Z is in a stationary state, the local control system unit C controls the pump station P to close and stop supplying liquid to the hydraulic support Z. At this time, the hydraulic support Z liquid inlet pipeline is closed to maintain pressure in order to perform static support. In addition, the local control system unit C can also monitor the outlet pressure P of the pump station P. 出压 , and according to the outlet pressure P 出压 Realize frequency conversion and pressure regulation to meet the hydraulic support Z automatic follow-up machine different support action of the liquid demand: when the hydraulic support Z automatic follow-up machine, to push Z 推 、Rising column Z 升 When a large flow rate is required, the outlet pressure of the pump station P is P 出压 Due to the untimely supply of liquid, the pressure will drop significantly. This large flow of liquid will eventually be transferred to the pump station outlet in time through pressure. At this time, the local control system unit C monitors the pump station P outlet pressure P 出压 Fluctuation will control the high-frequency operation of the pump station P to achieve a large flow rate of emulsion P 大供 Supply to meet the needs of hydraulic support Z high pressure and large flow emulsion P 大供 Supply; when the hydraulic support Z automatically follows the machine to lower the column Z 降 Or Guard Z 护 , requiring a small flow rate of liquid supply P 小供 At this time, the local control system unit C controls the pump station P to operate at a low frequency. This small flow of liquid is eventually transferred to the pump station outlet in a timely manner through pressure, realizing the small flow of emulsion P at the pump station. 小供 supply.
[0020] The local control system unit C can monitor and control the support and the oil level P of the pump station P tank. 位 , oil temperature P 温 、Oil pressure P 压 , Pump station outlet pressure P 出压 , and emulsion tank X level X 位 When the oil level P of the oil tank of the above pump station P is 位 , oil temperature P 温 、Oil pressure P 压 If the standard is not met, the local control system unit C can give an alarm and prompt the next step: when the oil level in the tank P 位 and oil pressure P 压 When the oil temperature is too low, the local control system unit C will alarm and prompt the maintenance personnel to refuel. 温 If the liquid level in the emulsion tank is too high, the local control system unit C will give an alarm and prompt the maintenance personnel to shut down the machine and cool it down in time. 位If the level is too low, the local control system unit C will sound an alarm and prompt the maintenance personnel to add emulsion in time to ensure the supply of emulsion to the coal mining face.
[0021] The data of the hydraulic support Z, the oil tank of the pump station P, the liquid level data of the emulsion tank X, and the frequency conversion control data of the pump station P monitored by the above-mentioned local control system unit C can be uploaded to the centralized control system unit J, and the centralized control system unit J realizes remote monitoring and control of the hydraulic support Z, the pump station P, and the emulsion tank X; at the same time, the centralized control system unit J can also upload the received data to the ground monitoring room D, so that the ground management personnel can understand and judge and analyze the working status of the hydraulic support Z and the downhole pump station P, the emulsion tank X and other equipment in the support system, so as to perform remote control on the ground.
[0022] The present invention has the following beneficial effects: 1. The present invention adopts a liquid supply method in which one hydraulic support is equipped with one pump station, that is, one hydraulic support is supplied with liquid by one pump station alone. As the hydraulic support automatically follows the machine to perform lowering, moving and raising actions, the pump station is synchronously turned on to supply liquid to the hydraulic support, thereby meeting the timely supply demand for liquid for the hydraulic support; it solves the problem of untimely liquid supply caused by the traditional hydraulic support system that adopts the pump station to centrally supply liquid, and especially solves the problem that the pump station cannot supply a large flow of emulsion in time when the existing traditional hydraulic support system is automatically following the machine and performing support actions such as lowering, moving and raising.
[0023] 2. The present invention adopts a liquid supply method in which one hydraulic support is equipped with one pump station. The pressure and flow rate of the emulsion output by the pump station meet the supply requirements of high pressure and large flow rate of the hydraulic support system, without loss along the way. It solves the problem of large loss along the way of the pipeline in the existing traditional hydraulic support using the centralized liquid supply technology of the pump station. In particular, it solves the problem that the centralized liquid supply pump station of the traditional hydraulic support is far away from the coal mining working face, resulting in large pressure loss along the pipeline, which cannot meet the initial support force requirements of the hydraulic support, and further causes safety hazards such as roof collapse and spalling of the coal seam underground.
[0024] 3. The present invention adopts the local control system unit of the hydraulic support to control the opening and closing of the pump station. When the automatic following action of the hydraulic support ends, the pump station stops supplying fluid, so as to realize the synchronous control of the start and stop of the hydraulic support and the opening and closing of the pump station, which solves the problem that the pump station fluid supply cannot be synchronized with the support action caused by the centralized fluid supply technology of the pump station in the existing traditional hydraulic support system, and the pump station continues to run at a high speed when the hydraulic support is in a stopped state, resulting in energy loss and reduced equipment life.
[0025] 4. The local control system unit in the present invention can realize synchronous frequency conversion control of the pump station according to the monitored pump station outlet pressure. Since the pump station is placed nearby the hydraulic support, when the hydraulic support uses fluid under different working conditions, the required pressure and flow of the pump station will be fed back to the pump station very promptly. At this time, the local control system unit will perform frequency conversion speed regulation in time according to the monitored pump station outlet data, which solves the problem that the traditional support system adopts centralized fluid supply, and the emulsion pressure and flow required by the support cannot be fed back to the pump station in time due to the pump station being far away from the working face, resulting in the control system performing frequency conversion speed regulation according to the delayed feedback of the monitored pump station outlet pressure and flow, which cannot meet the synchronization of the actual working conditions of the pump station and the hydraulic support on the working face, affecting the automatic following of the support in coal mining.
[0026] 5. The present invention places an independent pump station nearby to supply fluid to the hydraulic system of a single support. The inlet and return pipelines are very short, which is not only easy to maintain and reduces the cost of laying pipelines along the way, but also because it is close to the hydraulic support system, there is no need to lay long-distance transmission pipelines. The original filtering equipment of the single hydraulic support system can be used nearby, and other supporting equipment such as unnecessary emulsion guarantee systems can be discarded, further reducing the equipment investment cost.
Claims
1. A hydraulic support system with a built-in pump station, characterized in that: The hydraulic support system includes several hydraulic supports for supporting, several pumping stations for pumping emulsion for the hydraulic supports, several local control system units for monitoring and controlling the hydraulic supports and the corresponding pumping stations, and a centralized control system unit for centrally managing the monitoring signals and control signals of the local control system units. Several pumping stations are arranged corresponding to several hydraulic supports and the pumping stations are arranged at the proximate positions of the corresponding hydraulic supports; the hydraulic supports are connected to the emulsion tank via the corresponding pumping stations; the several local control system units are arranged corresponding to several hydraulic supports and several pumping stations connected to the hydraulic supports and monitor and control the supporting status of the corresponding hydraulic supports and the working status of the corresponding pumping stations; several local control system units are connected to the centralized control system unit and transmit the monitoring and control signals of the hydraulic supports and pumping stations to the centralized control system unit.
2. The hydraulic support system with a built-in pump station as claimed in claim 1, characterized in that: One end of the pump station is connected to the emulsion tank through a liquid inlet pipeline, and the other end of the pump station is connected to the liquid inlet pipeline of the corresponding hydraulic support, and the return hole of the hydraulic support is connected to the emulsion tank through the liquid return pipeline.
3. The hydraulic support system with a built-in pump station as claimed in claim 2, characterized in that: The supporting states of the hydraulic support include a column lowering state, a column raising state, a pushing state, a column extending and retracting state, and a stationary state.
4. The hydraulic support system with a built-in pump station as claimed in claim 3, characterized in that: The working state of the pump station includes the opening and closing state and the monitoring state of the oil temperature, oil pressure, oil level and outlet pressure.
5. The hydraulic support system with a built-in pump station as claimed in claim 4, characterized in that: The local control system unit is connected to the emulsion tank and monitors the emulsion level in the emulsion tank.
6. The hydraulic support system with a built-in pump station as claimed in claim 5, characterized in that: The hydraulic support system also includes a ground monitoring system unit for ground personnel to remotely monitor the working status of the underground hydraulic support, the working status of the pump station and the liquid level of the emulsion tank and realize remote control. The ground monitoring system unit is connected to the centralized control system unit to realize signal transmission operations.
7. A working method of a hydraulic support system with a self-contained pump station as claimed in claim 6, characterized in that: The following steps are involved: S1. During coal mining, the hydraulic support starts to follow the machine automatically, and the local control system unit controls the working state of the corresponding pump station according to the working state of the hydraulic support; S2. When the hydraulic support is in the pushing state or the column raising state, a large flow of emulsion is required. At this time, the outlet pressure of the pump station is in a reduced state. The local control system unit controls the pump station to operate at a high frequency to realize the supply of a large flow of emulsion, so that the hydraulic support can perform pushing and column raising actions; S3. When the hydraulic support is in the column lowering state and the side protection state, a small flow of emulsion is required. At this time, the outlet pressure of the pump station is in the state of increasing and high-pressure maintenance. The local control system unit controls the pump station to operate at a low frequency to realize the supply of small flow of emulsion, so that the hydraulic support can perform the column lowering action and the side protection action; S4. When the hydraulic support is in a stationary state, the local control system unit controls the pump station to shut down, stops supplying fluid to the hydraulic support, closes the hydraulic support's inlet and return pipelines to maintain pressure, and maintains static support operation; S5. During the operation of the hydraulic support, the local control system unit keeps monitoring the oil temperature, oil pressure, oil level of the pump station and the emulsion level in the emulsion tank. When the oil temperature, oil pressure and oil level of the pump station are abnormal or the emulsion level in the emulsion tank is too low, an alarm will be triggered to prompt the maintenance personnel to perform maintenance on the pump station and emulsion tank.