CN110847903A - Cutting protection system and method for drum of coal mining machine - Google Patents
Cutting protection system and method for drum of coal mining machine Download PDFInfo
- Publication number
- CN110847903A CN110847903A CN201911178721.0A CN201911178721A CN110847903A CN 110847903 A CN110847903 A CN 110847903A CN 201911178721 A CN201911178721 A CN 201911178721A CN 110847903 A CN110847903 A CN 110847903A
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- control unit
- unit
- cutting
- inert gas
- coal mining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/04—Safety devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/08—Rock dusting of mines; Depositing other protective substances
Abstract
The invention discloses a cutting protection system and a method for a drum of a coal mining machine, wherein the system comprises: the device comprises a remote control unit, a spark prevention control unit, a coal mining machine control unit, a spraying unit and an inert gas spraying unit; the remote control unit is connected with the coal mining machine control unit, and the coal mining machine control unit is used for controlling the walking and cutting operation of the coal mining machine; the remote control unit is connected with the spark prevention control unit, and the spark prevention control unit is connected with the spraying unit and the inert gas injection unit and is used for controlling the spraying unit and the inert gas injection unit to work; the spraying unit is used for spraying atomized water to the cutting area; and the inert gas injection unit is used for injecting inert gas to the cutting area. According to the cutting protection system and method for the drum of the coal mining machine, provided by the invention, double protection is carried out through atomized water and inert gas, gas combustion or explosion is avoided, and the safety is higher.
Description
Technical Field
The invention relates to the technical field of mining machinery, in particular to a cutting protection system and method for a drum of a coal mining machine.
Background
In mine coal mining operation, a coal mining machine roller is used for cutting coal rocks to finish coal mining work. When the coal mining machine drum cuts the coal rock, due to collision and friction among the cutting teeth, the tooth holder and the coal rock, when energy required by metal electronic transition is achieved, the metal can release sparks. The gas storage amount in the high gas mine coal bed is high, gas can be released in the coal rock cutting process, and particularly near the roller, the gas concentration in the air is high. When the energy of the cutting spark reaches the ignition point of gas, the gas can be burnt and even exploded. Therefore, it is necessary to protect the coal cutting process of the shearer drum from gas combustion or explosion.
In the prior art, a cutting process is protected by cladding a ceramic layer material on the surface of a cutting tooth of a roller. The ceramic material is inert material, and can not generate sparks due to collision friction, thereby playing a role in protection. However, the ceramic layer cladded on the surface of the roller is easy to wear or separate in the collision friction process, and the protection effect is lost.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a system and a method for protecting the drum of a coal mining machine from cutting. The specific technical scheme is as follows:
in a first aspect, there is provided a shearer drum cutting protection system, the system comprising: the device comprises a remote control unit, a spark prevention control unit, a coal mining machine control unit, a spraying unit and an inert gas spraying unit; the remote control unit is connected with the coal mining machine control unit, and the coal mining machine control unit is used for controlling the walking and cutting operation of the coal mining machine; the remote control unit is connected with the spark prevention control unit, and the spark prevention control unit is connected with the spraying unit and the inert gas spraying unit and is used for controlling the spraying unit and the inert gas spraying unit to work; the spraying unit is used for spraying atomized water to the cutting area; and the inert gas injection unit is used for injecting inert gas to the cutting area.
In one possible design, the coal cutter control unit is respectively connected with a traction speed governor and a cutting motor controller, the traction speed governor is used for controlling the coal cutter to walk, and the cutting motor controller is connected with the drum and is used for controlling the drum to rotate.
In one possible design, the system further includes: the data acquisition unit is connected with the remote control unit and the spark prevention control unit; the data acquisition unit is used for detecting data acquisition of a cutting area and sending the acquired data to the anti-spark control unit and the coal cutter control unit.
In one possible design, the data acquisition unit is connected with a spray water pressure flow sensor and used for detecting the pressure and flow of spray water, when the pressure and/or flow of the spray water is lower than a preset value, the remote control system controls the coal mining machine to slow down and stop through the coal mining machine control system, and then the spray unit is overhauled.
In a possible design, the data acquisition unit is connected with a gas sensor and an infrared spark sensor and is respectively used for detecting the gas concentration and the spark of the cutting area, and when the gas concentration exceeds a preset value and/or the spark is detected, the spark prevention control unit controls the inert gas injection unit to inject the inert gas to the cutting area.
In one possible design, the system further includes: and the filtering and softening water device is connected with the spark prevention control unit and is used for filtering and softening the water source of the spraying unit.
In one possible design, the data acquisition unit is connected with the water quality detection sensor and is used for detecting the content of calcium and magnesium ions in the atomized water sprayed by the spraying unit, and when the content of the calcium and magnesium ions exceeds a preset value, the spark prevention control unit opens the water filtering and softening device to filter.
In one possible design, the system further includes: and the alarm device is connected with the spark prevention control unit and used for sending alarm information when an abnormal condition occurs.
In one possible design, the shearer drum is a spark-resistant cutting drum.
In a second aspect, there is provided a shearer drum cutting protection method, the method comprising:
the remote control unit controls the coal mining machine to walk and cut through the coal mining machine control unit;
in the cutting operation process, the sparkproof control unit controls the spraying unit to spray atomized water to the cutting area and controls the inert gas spraying unit to spray inert gas to the cutting area.
The technical scheme of the invention has the following main advantages:
according to the protection system and the protection method for the drum cutting of the coal mining machine, atomized water is sprayed to the cutting area through the spraying unit, the inert gas is sprayed to the cutting area through the inert gas spraying unit, double protection is performed through the atomized water and the inert gas, gas combustion or explosion is avoided, and the safety is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a shearer drum cutting protection system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
In a first aspect, an embodiment of the present invention provides a shearer drum cutting protection system, as shown in fig. 1, the system includes: the system comprises a remote control unit, a spark prevention control unit, a coal mining machine control unit, a spraying unit and an inert gas spraying unit. The remote control unit is connected with the coal mining machine control unit, and the coal mining machine control unit is used for controlling the walking and cutting work of the coal mining machine. The remote control unit is connected with the spark prevention control unit, and the spark prevention control unit is connected with the spraying unit and the inert gas injection unit and is used for controlling the spraying unit and the inert gas injection unit to operate. And the spraying unit is used for spraying water mist to the cutting area. And the inert gas injection unit is used for injecting inert gas to the cutting area.
The working principle of the shearer drum cutting protection system provided by the embodiment of the invention is explained as follows:
when the remote control device is used, a worker can input an instruction through the remote control unit, and the remote control unit controls the coal mining machine to walk and the roller to act through the coal mining machine control unit so as to perform coal mining operation. When cutting coal rock, the sparkproof control unit controls the spraying unit to spray atomized water to the cutting area, so that the effects of dust fall and fire extinguishing are achieved. Meanwhile, the spark prevention control unit can also control the inert gas injection unit to inject inert gas to the cutting area, and the cutting teeth are wrapped in the inert gas atmosphere, so that gas lacks of a combustion environment, and gas combustion or explosion is avoided.
Therefore, the coal mining machine drum cutting protection system provided by the embodiment of the invention has the advantages that the atomizing unit is arranged to spray atomized water to the cutting area, the inert gas spraying unit is arranged to spray inert gas to the cutting area, the atomized water and the inert gas are used for double protection, gas combustion or explosion is avoided, and the safety is high.
The following provides detailed description of the components of the shearer drum cutting protection system provided by the embodiment of the invention:
as shown in the attached figure 1, the coal cutter control unit is respectively connected with a traction speed governor and a cutting motor controller, the traction speed governor is used for controlling the coal cutter to walk, and the cutting motor controller is connected with the drum and is used for controlling the drum to run.
As shown in fig. 1, the shearer drum cutting protection system provided by the embodiment of the present invention further includes: the data acquisition unit is connected with the remote control unit and the spark prevention control unit; the data acquisition unit is used for detecting data acquisition of the cutting area and sending the acquired data to the spark prevention control unit and the coal mining machine control unit.
Through setting up the data acquisition unit, be convenient for master the on-the-spot operating mode in cutting region to according to the instruction of real-time operating mode guide remote control unit and spark prevention control unit, make coal-winning machine operation, spraying unit and inert gas injection unit can carry out real-time adjustment according to the cutting operating mode, stability and security are stronger.
In the embodiment of the invention, the spraying unit is used for spraying atomized water to play double roles of dust fall and fire extinguishing, and in order to ensure that the working environment of the cutting area is better, the spraying system can be in a normally open state, continuously sprays the atomized water to the cutting area and can play a role of cooling. The spray unit may be connected to a downhole water supply from which water is provided. The opening and closing of the spraying unit can be controlled by an electric ball valve. When the spraying device is used, the spark prevention control unit is connected with the electric ball valve to control the spraying unit to be opened and closed.
Optionally, as shown in fig. 1, the data acquisition unit is connected to a spray water pressure flow sensor, and is configured to detect pressure and flow of spray water, and when the pressure and/or flow of spray water is lower than a preset value, the remote control system controls the coal mining machine to slow down and stop through the coal mining machine control system, and then the spray unit is overhauled. So set up, be convenient for in time discover the trouble and overhaul, guarantee spraying stability. The fault threshold values of the water spray pressure and the water spray flow can be set according to the field working conditions, for example, when the water spray pressure is detected to be lower than 4MPa or the water spray flow is detected to be lower than 80L/min, the spraying unit is judged to have a fault, at the moment, the coal mining machine is controlled to slow down and stop, the roller stops rotating, and workers check and maintain the spraying unit.
Further, in order to prevent the nozzles of the spraying unit from being blocked by the high content of calcium and magnesium ions in the water source provided by the underground water supply system, as shown in fig. 1, the cutting protection system for the shearer drum provided by the embodiment of the invention further includes: and the water filtering and softening device is connected with the spark prevention control unit and is used for filtering and softening the water mist sprayed out by the spraying unit. The data acquisition unit is connected with the water quality detection sensor and is used for detecting the content of calcium and magnesium ions in water mist sprayed by the spraying unit, and when the content of the calcium and magnesium ions exceeds a preset value, the spark prevention control unit starts the water filtering and softening device to filter.
The filtering and softening water device can be connected with the water inlet end of the spraying unit and connected with the spark prevention control unit, and the opening and closing are carried out under the control of the spark prevention control unit. Namely, when the water quality detection sensor detects that the content of calcium and magnesium ions in the sprayed atomized water exceeds a preset value, the spark prevention control unit controls the filtering and softening water device to be opened for filtering and softening operation. When the water quality monitoring sensor detects that the content of calcium and magnesium ions in the sprayed atomized water is in a normal range, the water filtering and softening device can be closed. The opening and closing of the filtering and softening water device can be controlled by the electric ball valve, the spark prevention control unit is connected with the electric ball valve, and whether the filtering and softening water works or not is controlled by controlling the electric ball valve.
In the embodiment of the invention, the inert gas injection unit is used for injecting the inert gas to the cutting area, the cutting teeth are wrapped in the inert gas environment, and the gas lacks of combustion conditions, so that the gas combustion and explosion are avoided. It can be understood that when the gas content is low, cutting safety can be ensured without injecting inert gas. Therefore, in the embodiment of the present invention, a gas sensor and an infrared spark sensor are provided, which are connected to the data acquisition unit, as shown in fig. 1, the data acquisition unit is connected to the gas sensor and the infrared spark sensor, and is respectively used for detecting the gas concentration and the spark in the cutting area, and when the gas concentration exceeds a preset value and/or the spark is detected, the spark prevention control unit controls the inert gas injection unit to inject the inert gas into the cutting area. When the gas concentration is reduced to be lower than the preset value, the inert gas injection unit can be closed. When the spark is not detected, the inert gas injection unit may be turned off. So set up, under the prerequisite of guaranteeing safety, reduce cost.
The inert gas may be carbon dioxide or nitrogen.
Optionally, as shown in fig. 1, the shearer drum cutting protection system provided in the embodiment of the present invention further includes: and the alarm device is connected with the spark prevention control unit and used for sending alarm information when an abnormal condition occurs. For example, when the pressure and/or flow of the atomizing water detected by the atomizing water pressure and flow sensor is lower than a preset value, the gas concentration detected by the gas sensor exceeds the preset value, the spark infrared sensor detects the spark, the water quality detection sensor detects abnormal conditions such as the content of calcium and magnesium ions in the atomizing water exceeds the preset value, the alarm device can give an alarm through acousto-optic alarm information, and the worker can conveniently and quickly obtain abnormal working conditions.
In the embodiment of the invention, in addition to the protection effect by spraying atomized water and inert gas, in order to further improve the safety performance, the drum of the coal mining machine is set as a spark-resistant cutting drum, so that the cutting safety is improved from different directions. The spark-resistant cutting drum may be obtained in a number of ways, for example, a ceramic layer may be deposited on the surface of the cutting drum, and the shearer drum may be configured as a spark-resistant cutting drum.
In the cutting protection system for the drum of the coal mining machine provided by the embodiment of the invention, the remote control unit and the alarm device can be arranged in a cab of the coal mining machine, so that an operator can conveniently control and timely acquire alarm information. The spraying unit, the filtered water softening device, the inert gas spraying unit, the sprayed water pressure flow sensor, the gas sensor, the infrared detection sensor and the water quality detection sensor can be arranged near the cutting area, for example, can be arranged on a roller spindle or a rocker arm of a coal mining machine, and the like, as long as the working requirements of the spraying unit, the filtered water softening device, the inert gas spraying unit, the sprayed water pressure flow sensor, the gas sensor, the infrared detection sensor and the. The spark prevention control unit, the coal mining machine control unit and the data acquisition unit are used as intermediate components, and can be arranged in a cab or outside the cab, and the embodiment of the invention is not limited.
In a second aspect, an embodiment of the present invention provides a method for protecting cutting of a shearer drum, where the method includes:
the remote control unit controls the coal mining machine to walk and cut through the coal mining machine control unit.
In the cutting operation process, the sparkproof control unit controls the spraying unit to spray water mist to the cutting area, and controls the inert gas spraying unit to spray inert gas to the cutting area.
According to the method for protecting the drum of the coal mining machine from cutting, provided by the embodiment of the invention, atomized water is sprayed to the cutting area through the spraying unit, the inert gas is sprayed to the cutting area through the inert gas spraying unit, the atomized water and the inert gas are subjected to double protection, gas combustion or explosion is avoided, and the safety is higher.
Optionally, in the coal mining operation, when an operator of the coal mining machine finds that the coal mining machine is about to cut the hydraulic support on site, the operator may send an instruction through the remote control unit, and the remote control unit opens the inert gas injection unit through the spark prevention control unit to inject the inert gas. Meanwhile, the remote control unit controls the coal cutter to slow down and stop through the coal cutter control unit, and the roller stops rotating.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A shearer drum cutting protection system, comprising: the device comprises a remote control unit, a spark prevention control unit, a coal mining machine control unit, a spraying unit and an inert gas spraying unit;
the remote control unit is connected with the coal mining machine control unit, and the coal mining machine control unit is used for controlling the walking and cutting operation of the coal mining machine;
the remote control unit is connected with the spark prevention control unit, and the spark prevention control unit is connected with the spraying unit and the inert gas spraying unit and is used for controlling the spraying unit and the inert gas spraying unit to work;
the spraying unit is used for spraying atomized water to the cutting area;
and the inert gas injection unit is used for injecting inert gas to the cutting area.
2. The shearer drum cutting protection system of claim 1, wherein the shearer control unit is connected to a traction governor for controlling the shearer to travel and a cutting motor controller connected to the drum for controlling the drum to rotate, respectively.
3. The shearer drum cutting protection system of claim 1, further comprising: the data acquisition unit is connected with the remote control unit and the spark prevention control unit;
the data acquisition unit is used for detecting and acquiring data of a cutting area and sending the acquired data to the anti-spark control unit and the coal cutter control unit.
4. The shearer drum cutting protection system of claim 3, wherein the data acquisition unit is connected with a spray water pressure flow sensor for detecting the pressure and flow of spray water, and when the spray water pressure and/or flow is lower than a preset value, the remote control system controls the shearer to stop at a reduced speed through the shearer control system, and then the spray unit is overhauled.
5. The shearer drum cutting protection system of claim 3, wherein the data acquisition unit is connected to a gas sensor and an infrared spark sensor for detecting a gas concentration and a spark in the cutting area, respectively, and the spark prevention control unit controls the inert gas injection unit to inject the inert gas into the cutting area when the gas concentration exceeds a preset value and/or the spark is detected.
6. The shearer drum cutting protection system of claim 3, further comprising: and the filtering and softening water device is connected with the spark prevention control unit and is used for filtering and softening the water source of the spraying unit.
7. The shearer drum cutting protection system according to claim 6, wherein the data acquisition unit is connected to a water quality detection sensor for detecting the content of calcium and magnesium ions in the atomized water sprayed from the spray unit, and the spark prevention control unit starts the filtering and softening water device to filter when the content of calcium and magnesium ions exceeds a preset value.
8. The shearer drum cutting protection system of any one of claims 1 to 7, further comprising: and the alarm device is connected with the spark prevention control unit and used for sending alarm information when an abnormal condition occurs.
9. The shearer drum cutting protection system of claim 1, wherein the shearer drum is a spark resistant cutting drum.
10. A method for protecting cutting of a shearer drum, the method comprising:
the remote control unit controls the coal mining machine to walk and cut through the coal mining machine control unit;
in the cutting operation process, the sparkproof control unit controls the spraying unit to spray atomized water to the cutting area and controls the inert gas spraying unit to spray inert gas to the cutting area.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911178721.0A CN110847903A (en) | 2019-11-27 | 2019-11-27 | Cutting protection system and method for drum of coal mining machine |
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| CN201911178721.0A CN110847903A (en) | 2019-11-27 | 2019-11-27 | Cutting protection system and method for drum of coal mining machine |
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| CN201911178721.0A Pending CN110847903A (en) | 2019-11-27 | 2019-11-27 | Cutting protection system and method for drum of coal mining machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733106A (en) * | 2022-04-02 | 2022-07-12 | 山西潞安环保能源开发股份有限公司 | Automatic foam injection system and method for preventing and controlling cutting sparks of coal mining machine |
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