CN214846355U - Natural gas standard condition conversion device based on ABB PLC - Google Patents
Natural gas standard condition conversion device based on ABB PLC Download PDFInfo
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- CN214846355U CN214846355U CN202120695651.2U CN202120695651U CN214846355U CN 214846355 U CN214846355 U CN 214846355U CN 202120695651 U CN202120695651 U CN 202120695651U CN 214846355 U CN214846355 U CN 214846355U
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Abstract
The utility model provides a natural gas worker standard conditions conversion equipment based on ABB PLC realizes, the scheme that natural gas standard conditions table gathered temperature and pressure compares with the scheme that sets up monomer temperature sensor and pressure sensor, its measurement accuracy is stable and guaranteed, the interference killing feature to the environment and holistic measurement accuracy all can be higher than the scheme that sets up monomer temperature sensor and pressure sensor, and the matching nature of natural gas standard conditions table and PLC switch board is higher; setting a natural gas standard condition table as a standard reference table, and using an output flowmeter as a flow reference value for judging the conversion precision of working condition data; on the basis of the original structure, no hardware structure is added, and the system integration level is high.
Description
Technical Field
The utility model relates to a gas pipeline gas working condition flow and standard condition flow's accurate measurement field especially relates to a natural gas worker standard condition conversion equipment based on ABB PLC realizes.
Background
The automobile parts can not be supplied with energy by natural gas in the production and equipment processes. In the early stage, all natural gas meters in an automobile part processing factory are working condition meters, along with the development of an intelligent manufacturing technology, automobile part processing enterprises put forward energy conservation and emission reduction requirements, and data analysis is carried out by acquiring flow data of the natural gas meters, however, instantaneous flow and accumulated flow output by the working condition meters are working condition values, are greatly influenced by ambient temperature, and have large errors with actual flow values, so that the working condition meter output data cannot be applied to an intelligent manufacturing control system. In order to improve the accuracy of output values of the working condition tables, the following two methods are generally adopted, firstly, all the working condition tables are changed into standard condition tables, but the price of the standard condition tables is as high as 4 ten thousand per table, and one factory can contain hundreds of working condition tables, so that the scheme is high in cost and inconvenient to popularize; secondly, a temperature sensor and a pressure sensor are arranged, real-time temperature values and pressure values are acquired through the temperature sensor and the pressure sensor, temperature and pressure compensation is carried out on a working condition table based on the temperature values and the pressure values, and practical operation finds that the high-precision temperature sensor and the high-precision pressure sensor are high in precision when used as independent equipment for precision measurement and evaluation, but when the high-precision temperature sensor and the high-precision pressure sensor are matched with a PLC (programmable logic controller) control cabinet and the like, the measurement precision is easily influenced by other electronic equipment, the integral measurement precision cannot reach the measurement precision of the single temperature sensor and the single pressure sensor, and the measurement precision of the temperature and the pressure is far from the preset measurement precision. Therefore, in order to solve the problem, the utility model provides a conversion equipment of natural gas worker standard conditions based on ABB PLC realizes under the prerequisite of not changing the operating mode table and increasing system spare part, the conversion of realization operating mode data and standard conditions data for current operating mode table output data can use in the intelligent manufacturing control system.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a natural gas worker standard conditions conversion equipment based on ABB PLC realizes the conversion of operating mode data and standard conditions data under the prerequisite of not changing the operating mode table and increasing system spare part for current operating mode table output data can use in the intelligent manufacturing control system.
The technical scheme of the utility model is realized like this: the utility model provides a natural gas worker standard condition conversion equipment based on ABB PLC realizes, it includes server, industry looped netowrk switch, a plurality of natural gas operating mode table and a plurality of sets up the PLC switch board in different factory buildings, still includes a natural gas standard condition table;
the natural gas standard condition meters are arranged at any positions of the natural gas ring network and collect temperature data and pressure data of the pipeline in real time;
the PLC control cabinets of different plants are connected with all natural gas working condition meters in the plant through RS485 buses, the natural gas standard condition meters are connected with the PLC control cabinet of the plant where the natural gas standard condition meters are located through the RS485 buses, the PLC control cabinets of the different plants are connected with the industrial ring network switch through data buses, and the industrial ring network switch is connected with the server.
On the basis of the technical scheme, preferably, the natural gas standard condition meter is arranged in a main pipeline of the natural gas ring network.
On the basis of the technical scheme, preferably, the natural gas standard condition meter comprises a first flowmeter, a temperature sensor, a pressure sensor, a first processor and a first RS485 communication module, wherein the first flowmeter, the temperature collector and the pressure sensor are respectively electrically connected with an I/O port of the first processor, and a communication end of the first processor is communicated with the PLC control cabinet through the first RS485 communication module.
On the basis of the technical scheme, preferably, the natural gas working condition meter comprises a second flowmeter, a second processor and a second RS485 communication module, the second flowmeter is electrically connected with an I/O port of the second processor, and a communication end of the second processor is communicated with the PLC control cabinet through the second RS485 communication module.
The utility model discloses a natural gas worker standard conditions conversion equipment based on ABB PLC realizes has following beneficial effect for prior art:
(1) compared with the scheme of arranging the single temperature sensor and the single pressure sensor, the natural gas standard condition meter has stable and guaranteed measurement accuracy, has higher anti-interference capability to the environment and overall measurement accuracy than the scheme of arranging the single temperature sensor and the single pressure sensor, and has higher matching performance with the PLC control cabinet;
(2) setting a natural gas standard condition table as a standard reference table, and using an output flowmeter as a flow reference value for judging the conversion precision of working condition data;
(3) on the basis of the original structure, no hardware structure is added, and the system integration level is high;
(4) compared with the scheme of arranging a single temperature sensor and a single pressure sensor, the scheme of arranging the natural gas standard condition table can realize the communication with an upper computer on the original basis without additionally developing a script program, and the cost is lower;
(5) compared with the existing scheme, the scheme of setting the natural gas standard condition table is convenient to popularize, a hardware structure is not required to be added, the connection is simple, the temperature and pressure measurement precision is higher, and a script program is not required to be developed, so that the scheme of the embodiment can be very easily introduced into other fields using natural gas measurement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of a natural gas standard condition conversion device realized based on ABB PLC of the present invention;
FIG. 2 is a structural diagram of a natural gas standard condition table in the natural gas standard condition conversion device realized based on the ABB PLC of the utility model;
FIG. 3 is a structural diagram of a natural gas working condition table in the natural gas working standard condition conversion device realized based on the ABB PLC;
fig. 4 is an electrical connection diagram of embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
Example 1
As shown in FIG. 1, the utility model discloses a natural gas worker standard conditions conversion equipment based on ABB PLC realizes, it includes that server, industry looped netowrk switch, a plurality of natural gas operating mode table, a plurality of set up PLC switch board and a natural gas standard conditions table at different factory buildings. The natural gas standard condition meters are arranged at any positions of the natural gas ring network and collect temperature data and pressure data of the pipeline in real time; the PLC control cabinets of different plants are connected with all natural gas working condition meters in the plant through RS485 buses, the natural gas standard condition meters are connected with the PLC control cabinet of the plant where the natural gas standard condition meters are located through the RS485 buses, the PLC control cabinets of the different plants are connected with the industrial ring network switch through data buses, and the industrial ring network switch is connected with the server.
The natural gas working condition meter is used for collecting flow in a natural gas pipeline, the output instantaneous flow and the accumulated flow are working condition data, the influence of the ambient temperature is large, and the output numerical value and the actual flow value have large errors, so that the energy consumption analysis cannot be continuously promoted. In natural gas trade settlement, oneThe standard condition flow is calculated according to the standard condition flow, so that the working condition is converted into the standard condition data through a working standard condition data conversion calculation formula, wherein the working standard condition data conversion calculation formula is Qn＝Zn/Zg*(Pg+Pa)/Pn*Tn/Tg*Qg(ii) a Wherein Q isnAs standard condition data, QgAs operating condition data, PgNatural gas pressure, P, measured for a standard condition tableaCalculated as local atmospheric pressure, according to standard atmospheric pressure, PnGet 101.325, TgThe absolute temperature value of the natural gas is 273.15+ T, TnTake 293.15, Zn/Zg1 is taken. Obviously, the real-time temperature and pressure must be known to realize the conversion of the working standard condition data, but the natural gas working condition table cannot detect the temperature data and the pressure data, so that the more useful working standard condition data conversion method is to arrange a temperature sensor and a pressure sensor to obtain a real-time temperature value and a real-time pressure value, and then realize the conversion of the working condition data into the standard condition data through a working standard condition data conversion calculation formula.
However, this method has the following problems:
(1) because the temperature sensor and the pressure sensor are installed, in order to improve the anti-interference problem of the sensors, an analog circuit for conditioning signals output by the temperature sensor and the pressure sensor is required to be arranged, and meanwhile, an external interface of the PLC control cabinet is also required to be occupied, so that the circuit becomes complicated;
(2) in order to improve the temperature and pressure acquisition precision, high-precision measurement can be generally realized by selecting a temperature sensor and a pressure sensor with higher measurement precision, and the practical operation finds that the high-precision temperature sensor and the high-precision pressure sensor have higher precision when being used as independent equipment for precision evaluation, but when the high-precision temperature sensor and the high-precision pressure sensor are matched with a PLC (programmable logic controller) and the like, the measurement precision is easily influenced by other electronic equipment, so that the integral measurement precision cannot reach the measurement precision of the single temperature sensor and the single pressure sensor, and the measurement precision of the temperature and the pressure is far away from the preset measurement precision;
(3) after the conversion of the standard condition data is realized by adopting the prior art, whether the converted standard condition data is consistent with the standard condition data counted during natural gas trade settlement cannot be judged, and the conversion precision of the standard condition data cannot be judged;
(4) and a new script program needs to be developed to communicate with an upper computer, so that the cost is high.
Therefore, in order to solve the not enough of prior art, in this embodiment, set up a natural gas standard situation table, natural gas standard situation table has following advantage than natural gas operating mode table:
(1) the natural gas standard condition meter can acquire temperature and pressure information in real time, belongs to mature products, can be purchased directly from the market, and can transmit the temperature and pressure information acquired by the natural gas standard condition meter to the PLC control cabinet through the RS485 bus without wiring and algorithm development;
(2) the natural gas trade settlement is also performed by adopting a standard condition table for flow statistics, so that the natural gas standard condition table can be set as a standard reference table in the embodiment, and an output flow meter can be used as a flow reference value for judging the conversion precision of the working condition data;
(3) compared with the scheme of arranging the single temperature sensor and the single pressure sensor, the natural gas standard condition meter has stable and guaranteed measurement accuracy, has higher anti-interference capability to the environment and overall measurement accuracy than the scheme of arranging the single temperature sensor and the single pressure sensor, and has higher matching performance with the PLC control cabinet;
(4) on the basis of the original structure, no hardware structure is added, and the system integration level is high;
(5) compared with the scheme of arranging a single temperature sensor and a single pressure sensor, the scheme of arranging the natural gas standard condition table can realize the communication with an upper computer on the original basis without additionally developing a script program, and the cost is lower;
(6) compared with the existing scheme, the scheme of setting the natural gas standard condition table is convenient to popularize, a hardware structure is not required to be added, the connection is simple, the temperature and pressure measurement precision is higher, and a script program is not required to be developed, so that the scheme of the embodiment can be very easily introduced into other fields using natural gas measurement.
In this embodiment, the structure of the natural gas standard condition table is not improved, and the existing natural gas standard condition table on the market can be used. The typical structure of natural gas standard condition table is provided to this embodiment, as shown in fig. 2, the natural gas standard condition table includes first flowmeter, temperature sensor, pressure sensor, first treater and first RS485 communication module, and first flowmeter, temperature collector and pressure sensor are respectively with the IO mouth electric connection of first treater, and the communication end of first treater passes through first RS485 communication module and communicates with the PLC switch board. The temperature sensor and the pressure sensor respectively collect temperature values and pressure values and transmit collected information to the first processor; the first flowmeter acquires flow information in a pipeline and transmits the acquired information to the first processor; the first processor receives temperature values, pressure values and flow information output by the temperature sensor, the pressure sensor and the first flowmeter, converts working condition data into standard condition data according to a working standard condition data conversion calculation formula, and outputs the standard condition data to the PLC control cabinet through the first RS485 communication module. The above is the basic working principle of the natural gas standard condition table, belongs to the prior art, and will not be described herein again.
In this embodiment, the structural improvement of the natural gas operating condition table is not involved, and the existing natural gas operating condition table on the market can be adopted. The typical structure of natural gas operating mode table is provided to this embodiment, as shown in fig. 3, natural gas operating mode table includes second flowmeter, second treater and second RS485 communication module, and the I/O mouth electric connection of second flowmeter and second treater, the communication end of second treater pass through second RS485 communication module and PLC switch board communication. The second flowmeter acquires flow information in the pipeline and transmits the acquired information to the second processor; and the second processor outputs working condition data to the PLC control cabinet through the second RS485 communication module. The above is the basic working principle of the natural gas working condition table, belongs to the prior art, and is not described herein again.
The PLC control cabinet is internally provided with a PLC of an ABB, and the type of the PLC is not limited. In this embodiment, a plurality of natural gas operating mode table and a natural gas standard condition table all are connected with PLC's input electric connection.
The beneficial effect of this embodiment does: compared with the scheme of arranging the single temperature sensor and the single pressure sensor, the natural gas standard condition meter has stable and guaranteed measurement accuracy, has higher anti-interference capability to the environment and overall measurement accuracy than the scheme of arranging the single temperature sensor and the single pressure sensor, and has higher matching performance with the PLC control cabinet;
setting a natural gas standard condition table as a standard reference table, and using an output flowmeter as a flow reference value for judging the conversion precision of working condition data;
on the basis of the original structure, no hardware structure is added, and the system integration level is high;
compared with the scheme of arranging a single temperature sensor and a single pressure sensor, the scheme of arranging the natural gas standard condition table can realize the communication with an upper computer on the original basis without additionally developing a script program, and the cost is lower;
compared with the existing scheme, the scheme of setting the natural gas standard condition table is convenient to popularize, a hardware structure is not required to be added, the connection is simple, the temperature and pressure measurement precision is higher, and a script program is not required to be developed, so that the scheme of the embodiment can be very easily introduced into other fields using natural gas measurement.
Example 2
On the basis of embodiment 1, the present embodiment provides a specific application scenario in an automobile oven. As shown in fig. 4, three PLC control cabinets, namely, a circulating water PLC control cabinet, an air compressor PLC control cabinet, and a tail gate workshop PLC control cabinet, are used in the production line of the car oven; the type of the flow meter controlled by the circulating water PLC control cabinet is a thermal cleaning furnace gas flow meter; the types of the flow meters required to be controlled by the air compressor PLC control cabinet comprise a fresh air gas flow meter, an injection molding natural gas flow meter, a water washing gas flow meter, a varnish gas flow meter and an RTO gas flow meter; the type of the flowmeter controlled by the PLC control cabinet in the tail gate workshop is a tail gate gas flowmeter. The flow meters are all working condition meters, the output data of the flow meters are working condition data and are easily interfered by environmental factors, and the working condition data output by the flow meters cannot be used when the energy consumption analysis and the energy saving and emission reduction data analysis of a factory building are carried out, so that in order to solve the problems, the scheme of the embodiment 1 is adopted, a natural gas standard condition meter is arranged at a certain pipeline position of the factory building, preferably, in the embodiment, the natural gas standard condition meter is arranged in an air compressor room, the type of the natural gas standard condition meter is an injection molding natural gas standard condition flow meter and is controlled by an air compressor PLC control cabinet, the injection molding natural gas standard condition flow meter transmits the detected standard condition flow information, temperature value and pressure value to the air compressor PLC control cabinet, the air compressor PLC control cabinet carries out working standard condition data conversion, and the standard condition flow information, temperature value and pressure value detected by the injection molding natural gas standard condition flow meter are transmitted to the circulating water PLC control cabinet and a tail gate workshop PLC control cabinet through a network, and the circulating water PLC control cabinet and the tail door workshop PLC control cabinet convert the working condition data into standard condition data according to the temperature value, the pressure value and the working standard condition data conversion calculation formula and upload the standard condition data to the server.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a natural gas worker standard conditions conversion equipment based on ABB PLC realizes, its includes that server, industry looped netowrk switch, a plurality of natural gas operating mode table and a plurality of set up the PLC switch board in different factory buildings, its characterized in that: the natural gas standard condition table is also included;
the natural gas standard condition meters are arranged at any positions of the natural gas ring network and collect temperature data and pressure data of the pipeline in real time;
the PLC control cabinets of different plants are connected with all natural gas working condition meters in the plant through RS485 buses, the natural gas standard condition meters are connected with the PLC control cabinet of the plant where the natural gas standard condition meters are located through the RS485 buses, the PLC control cabinets of the different plants are connected with the industrial ring network switch through data buses, and the industrial ring network switch is connected with the server.
2. The ABB PLC-based natural gas standard condition conversion device as claimed in claim 1, wherein: the natural gas standard condition meter is arranged in a main pipeline of the natural gas looped network.
3. The ABB PLC-based natural gas standard condition conversion device as claimed in claim 1, wherein: the natural gas standard condition meter comprises a first flowmeter, a temperature sensor, a pressure sensor, a first processor and a first RS485 communication module, wherein the first flowmeter, the temperature collector and the pressure sensor are respectively electrically connected with an I/O port of the first processor, and a communication end of the first processor is communicated with the PLC control cabinet through the first RS485 communication module.
4. The ABB PLC-based natural gas standard condition conversion device as claimed in claim 1, wherein: the natural gas working condition meter comprises a second flowmeter, a second processor and a second RS485 communication module, the second flowmeter is electrically connected with an I/O port of the second processor, and a communication end of the second processor is communicated with the PLC control cabinet through the second RS485 communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120695651.2U CN214846355U (en) | 2021-04-06 | 2021-04-06 | Natural gas standard condition conversion device based on ABB PLC |
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| CN202120695651.2U CN214846355U (en) | 2021-04-06 | 2021-04-06 | Natural gas standard condition conversion device based on ABB PLC |
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| CN214846355U true CN214846355U (en) | 2021-11-23 |
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