CN111459120A - Long-pile pre-homogenizing equipment remote monitoring system network structure - Google Patents
Long-pile pre-homogenizing equipment remote monitoring system network structure Download PDFInfo
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- CN111459120A CN111459120A CN202010509201.XA CN202010509201A CN111459120A CN 111459120 A CN111459120 A CN 111459120A CN 202010509201 A CN202010509201 A CN 202010509201A CN 111459120 A CN111459120 A CN 111459120A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 40
- 238000000265 homogenisation Methods 0.000 claims abstract description 27
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 23
- 241000282326 Felis catus Species 0.000 claims description 28
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4184—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by fault tolerance, reliability of production system
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
- G05B19/41855—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication by local area network [LAN], network structure
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25232—DCS, distributed control system, decentralised control unit
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a network structure of a long-pile pre-homogenizing device remote monitoring system. The industrial personal computer is arranged in a central control room and establishes Ethernet communication with Ethernet communication modules in the mobile pre-homogenization equipment DCS control cabinet and the upstream and downstream fixed equipment DCS control cabinet to realize the remote monitoring function of the mobile pre-homogenization equipment and the upstream and downstream fixed equipment. The invention changes the network structure of the mobile pre-homogenizing device DCS control cabinet, the upstream and downstream fixed device DCS control cabinet and the industrial personal computer from a wireless connection mode to a wired connection mode consisting of an electric power modem, a sliding contact line and a current collector, eliminates the shielding effect of closed facilities of a steel structure, a color steel plate and the like on radio electromagnetic wave signals and the influence of complicated reflection, refraction, diffraction and the like, and ensures that the communication transmission distance is longer, the communication quality is more stable and reliable, the network safety is higher, and the later maintenance is more convenient.
Description
Technical Field
The invention relates to a control system of a pre-homogenizing device of a long pre-homogenizing stock yard, in particular to a network structure of a long pile pre-homogenizing device remote monitoring system.
Background
In the cement production process, a pre-homogenizing device is involved, and the components of the raw materials can be homogenized by a method of horizontally stacking the raw materials in layers and vertically cutting and taking the raw materials. Aims to mix and homogenize the raw materials of limestone and the like with different qualities and reduce the quality fluctuation so as to be beneficial to the stability of production. Because the long-pile-shaped pre-homogenizing equipment needs to walk along the material pile in a reciprocating mode to work, a power supply of the pre-homogenizing equipment generally adopts a trolley line to be combined with a current collector for supplying power, and is in communication connection with upstream and downstream equipment and a central control room control system in a wireless mode mostly. In use, the communication quality and the transmission distance are seriously reduced after the communication antenna is attached with dust materials, and the communication antenna is generally arranged higher, so that dust removal is very inconvenient; in addition, along with the improvement of environmental protection consciousness in recent years, most pre-homogenization storage yards are sealed by adopting a steel structure and a color steel plate, the steel structure and the color steel plate have a shielding effect on radio electromagnetic waves, and a series of complex effects such as reflection, refraction and diffraction are achieved, so that the transmission distance and the stability of wireless communication signals are seriously affected, the communication interruption phenomenon occurs occasionally, communication interruption occurs during the operation of equipment, the linkage with upstream and downstream equipment loses the effect, the monitoring of a central control room is lost simultaneously, a great potential safety hazard exists, and a network structure with more reliable communication is urgently needed to be found.
Disclosure of Invention
The invention aims to solve the problems of poor stability, difficult maintenance, potential safety hazard and the like of wireless communication transmission between a long pile pre-homogenizing device control system and upstream and downstream devices and a middle control room control system, thereby providing a long pile pre-homogenizing device remote monitoring system network structure.
The invention solves the problems and adopts the technical scheme that:
the utility model provides a microscler heap prehomogenization equipment remote monitering system network structure, includes industrial computer, removes the DCS switch board of prehomogenization equipment, upper and lower stream fixed equipment DCS switch board, and the industrial computer sets up in central control room, through with remove in advance the DCS switch board of homogenization equipment and the upper and lower stream fixed equipment DCS switch board ethernet communication module establish ethernet communication, realize the remote monitoring function to removing in advance homogenization equipment and upper and lower stream fixed equipment.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
the network structure of the mobile pre-homogenization equipment DCS control cabinet, the upstream and downstream fixed equipment DCS control cabinet and the industrial personal computer is changed from a wireless connection mode into a wired connection mode consisting of an electric power modem, a sliding contact line and a current collector, so that the shielding effect of storage yard closed facilities such as a steel structure and a color steel plate on radio magnetic wave signals is eliminated, and the influences of complicated reflection, refraction, diffraction and the like are eliminated, so that the communication transmission distance is longer, the communication quality is more stable and reliable, the network security is higher, and the later maintenance is more convenient.
Preferably, the further technical scheme of the invention is as follows:
the industrial personal computer is connected with the DCS control cabinet of the upstream and downstream fixed equipment through the photoelectric converter, the industrial switch, the Ethernet line and the communication optical cable.
The system also comprises a sliding contact line, a current collector and an electric cat, wherein the industrial personal computer is connected with the mobile pre-homogenization equipment DCS control cabinet through the sliding contact line, the current collector, the electric cat, the electric cat, the photoelectric converter, the industrial switch, the Ethernet line and the communication optical cable.
The electric cat and cat are to be installed near the middle position of the sliding contact line, the electric cat and the sliding contact line are connected through a double-core shielded cable, one line is connected with a phase line L1 of the sliding contact line, the other line is connected with a zero line N of the sliding contact line, and the electric cat and an industrial switch at the fixed equipment end are connected through an Ethernet line.
The electric cat is to be installed on the mobile pre-homogenization equipment body, is close to the vicinity of the current collector and is far away from the frequency conversion equipment, the electric cat and the current collector are connected through a double-core shielded cable, one line is connected with the current collector on the sliding contact line phase line L1, the other line is connected with the current collector on the sliding contact line zero line N, and the electric cat and the Ethernet communication module on the mobile pre-homogenization equipment DCS control cabinet are connected through the Ethernet line.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure, an industrial personal computer 1, a mobile pre-homogenization equipment DCS control cabinet 2, an upstream and downstream fixed equipment DCS control cabinet 3, a sliding contact line 4, a current collector 5, an electric cat mao 6, an electric cat mao 7, an industrial controller end photoelectric converter 8, an industrial controller end industrial switch 9, an Ethernet line 10, a communication optical cable 11, a double-core shielded cable 12, an Ethernet communication module 13, a P L C controller 14, an input and output module 15, a fixed equipment end photoelectric converter 16 and a fixed equipment end industrial switch 17 are arranged.
The specific implementation mode is as follows:
the invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
Referring to fig. 1, a long pile pre-homogenizing device remote monitoring system is composed of an industrial personal computer 1, a mobile pre-homogenizing device DCS control cabinet 2, an upstream and downstream fixed device DCS control cabinet 3, a sliding contact line 4, a current collector 5, a power cat 6, a power cat 7, a photoelectric converter, an industrial switch, an ethernet line 10, a communication optical cable 11 and a double-core shielded cable 12.
The industrial personal computer 1 is arranged in an inner central control room, and realizes the remote monitoring function of the mobile pre-homogenizing device and the upstream and downstream fixed devices by establishing Ethernet communication with the Ethernet communication modules 13 in the mobile pre-homogenizing device DCS control cabinet 2 and the upstream and downstream fixed device DCS control cabinet 3.
Remove homogenization equipment DCS switch board 2 in advance, install on removing the homogenization equipment body in advance, realize controlling along the equipment of homogenization stock dump reciprocating motion.
And the DCS control cabinet 3 of the upstream and downstream fixed equipment is arranged in a distribution room near the upstream and downstream equipment, so that the upstream and downstream fixed equipment of the pre-homogenization yard can be controlled.
The mobile pre-homogenizing device DCS control cabinet 2 and the upstream and downstream fixed device DCS control cabinet 3 are internally provided with an Ethernet communication module 13, a P L C controller 14 and an input and output module 15, wherein the Ethernet communication module 13 in the cabinet is used for realizing Ethernet communication connection between the control cabinets and between the control cabinet and an industrial personal computer, and the P L C controller 14 and the input and output module 15 are used for realizing start-stop control and state monitoring of the mobile pre-homogenizing device and the upstream and downstream fixed devices.
The industrial personal computer 1 is connected with the upstream and downstream fixed equipment DCS control cabinet 3 through a photoelectric converter, an industrial exchanger, an Ethernet line 10 and a communication optical cable 11; the concrete connection structure is as follows: the industrial personal computer 1 is connected with an industrial personal computer end industrial switch 9 through an Ethernet cable 10, the industrial personal computer end industrial switch 9 is connected with an industrial personal computer end photoelectric converter 8 through the Ethernet cable 10, the industrial personal computer end photoelectric converter 8 is connected with a fixed equipment end photoelectric converter 16 through a communication optical cable 11, the fixed equipment end photoelectric converter 16 is connected with a fixed equipment end industrial switch 17 through the Ethernet cable 10, and the fixed equipment end industrial switch 17 is connected with an Ethernet communication module 13 in an upper and lower fixed equipment DCS control cabinet 3 through the Ethernet cable 10.
The network connection between the industrial personal computer 1 and the mobile pre-homogenization equipment DCS control cabinet 2 is realized through a sliding contact line 4, a current collector 5, an electric cat 6, an electric cat 7, a photoelectric converter, an industrial switch, an Ethernet line 10, a communication optical cable 11 and a double-core shielded cable 12; the concrete connection structure is as follows:
the power cat-cat 6 is installed near the middle position of the sliding contact line 4, the power cat-cat 6 is connected with the sliding contact line 4 through the double-core shielded cable 12, one line is connected with the phase line L1 of the sliding contact line 4, the other line is connected with the zero line N of the sliding contact line 4, and the power cat-cat 6 is connected with the fixed equipment end industrial switch 17 through the Ethernet line 10.
Electric cat 7 is installed on the removal pre-homogenization equipment body, is close to near current collector 5 to keep away from frequency conversion equipment, adopts two-core shielded cable 12 to connect between electric cat 7 and the current collector 5, and the current collector on 4 looks lines L1 of wiping line is connected to one line, the current collector on 4 zero lines N of wiping line is connected to another line, connect with ethernet line 10 between electric cat 7 and the ethernet communication module 13 on the removal pre-homogenization equipment DCS switch board 2.
The invention changes the network structure of the mobile pre-homogenizing device DCS control cabinet, the upstream and downstream fixed device DCS control cabinet and the industrial personal computer from a wireless connection mode to a wired connection mode consisting of an electric power modem, a sliding contact line and a current collector, eliminates the shielding effect of closed facilities of a steel structure, a color steel plate and the like on radio electromagnetic wave signals and the influence of complicated reflection, refraction, diffraction and the like, and ensures that the communication transmission distance is longer, the communication quality is more stable and reliable, the network safety is higher, and the later maintenance is more convenient.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (5)
1. The utility model provides a long form is piled homogenization equipment remote monitering system network structure in advance, includes industrial computer, removal homogenization equipment DCS switch board, upstream and downstream fixed equipment DCS switch board, its characterized in that in advance: the industrial personal computer is arranged in the central control room, and establishes Ethernet communication with the Ethernet communication modules in the mobile pre-homogenization equipment DCS control cabinet and the upstream and downstream fixed equipment DCS control cabinet, so that the remote monitoring function of the mobile pre-homogenization equipment and the upstream and downstream fixed equipment is realized.
2. The elongated stack pre-homogenization apparatus remote monitoring system network structure of claim 1 wherein: the industrial personal computer is connected with the DCS control cabinet of the upstream and downstream fixed equipment through the photoelectric converter, the industrial switch, the Ethernet line and the communication optical cable.
3. The elongated stack pre-homogenization apparatus remote monitoring system network structure of claim 2 wherein: the system also comprises a sliding contact line, a current collector and an electric cat, wherein the industrial personal computer is connected with the mobile pre-homogenization equipment DCS control cabinet through the sliding contact line, the current collector, the electric cat, the electric cat, the photoelectric converter, the industrial switch, the Ethernet line and the communication optical cable.
4. The network structure of the long-sized reactor pre-homogenizing device remote monitoring system according to claim 3, wherein the power cat is to be installed near the middle position of the sliding contact line, the power cat and the sliding contact line are connected by adopting a two-core shielded cable, one line is connected with a phase line L1 of the sliding contact line, the other line is connected with a zero line N of the sliding contact line, and the power cat and the industrial switch at the fixed device end are connected by an Ethernet line.
5. The network structure of the long-stack pre-homogenization equipment remote monitoring system according to claim 3, wherein the power cat is to be installed on the mobile pre-homogenization equipment body, is close to the current collector and is far away from the frequency conversion equipment, the power cat and the current collector are connected by adopting a double-core shielded cable, one wire is connected with the current collector on the phase line L1 of the trolley line, the other wire is connected with the current collector on the zero line N of the trolley line, and the power cat and the Ethernet communication module on the DCS control cabinet of the mobile pre-homogenization equipment are connected by using an Ethernet wire.
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CN202010509201.XA CN111459120A (en) | 2020-06-07 | 2020-06-07 | Long-pile pre-homogenizing equipment remote monitoring system network structure |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115515011A (en) * | 2022-10-26 | 2022-12-23 | 国核自仪系统工程有限公司 | Multi-screen display remote release control device and DCS (distributed control System) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090278931A1 (en) * | 2006-06-30 | 2009-11-12 | Kt Corporation | Video data transmission system for remote-monitoring and remote-monitoring equipment using the same |
CN204166354U (en) * | 2014-08-26 | 2015-02-18 | 山西蓝天环保设备有限公司 | For the automatic control system of middle-size and small-size coal dust industrial hot water boiler |
CN105964388A (en) * | 2016-06-16 | 2016-09-28 | 北京考利特电器设备有限责任公司 | Remote coal mill monitoring system and method |
CN110647095A (en) * | 2018-06-27 | 2020-01-03 | 宜兴市创联自动化设备有限公司 | Sewage and wastewater intelligent control cabinet |
CN211827014U (en) * | 2020-06-07 | 2020-10-30 | 金隅冀东水泥(唐山)有限责任公司唐山分公司 | Long-pile pre-homogenizing equipment remote monitoring system network structure |
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2020
- 2020-06-07 CN CN202010509201.XA patent/CN111459120A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090278931A1 (en) * | 2006-06-30 | 2009-11-12 | Kt Corporation | Video data transmission system for remote-monitoring and remote-monitoring equipment using the same |
CN204166354U (en) * | 2014-08-26 | 2015-02-18 | 山西蓝天环保设备有限公司 | For the automatic control system of middle-size and small-size coal dust industrial hot water boiler |
CN105964388A (en) * | 2016-06-16 | 2016-09-28 | 北京考利特电器设备有限责任公司 | Remote coal mill monitoring system and method |
CN110647095A (en) * | 2018-06-27 | 2020-01-03 | 宜兴市创联自动化设备有限公司 | Sewage and wastewater intelligent control cabinet |
CN211827014U (en) * | 2020-06-07 | 2020-10-30 | 金隅冀东水泥(唐山)有限责任公司唐山分公司 | Long-pile pre-homogenizing equipment remote monitoring system network structure |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115515011A (en) * | 2022-10-26 | 2022-12-23 | 国核自仪系统工程有限公司 | Multi-screen display remote release control device and DCS (distributed control System) |
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