CN214744982U - A divide defeated device for natural gas line - Google Patents
A divide defeated device for natural gas line Download PDFInfo
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- CN214744982U CN214744982U CN202121261629.3U CN202121261629U CN214744982U CN 214744982 U CN214744982 U CN 214744982U CN 202121261629 U CN202121261629 U CN 202121261629U CN 214744982 U CN214744982 U CN 214744982U
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Abstract
The utility model discloses a separate transportation device for a natural gas pipeline, which comprises a pressure regulating controller, a regulating valve and a process pipeline matched with the regulating valve, wherein the process pipeline is provided with a digital sensor, and the pressure regulating controller controls the regulating valve according to parameters acquired by the digital sensor; the fuzzy control module is arranged in the pressure regulating controller and is electrically connected with the pressure regulating controller. The utility model provides a divide defeated device for natural gas line, have the response time short, the fast characteristics of governing speed; meanwhile, the fuzzy control module is arranged in the pressure regulating controller, so that the overshoot amount can be effectively reduced under the condition of ensuring the regulating speed of the distributing and conveying device, and the distributing and conveying are more accurate.
Description
Technical Field
The utility model belongs to the technical field of the natural gas is carried, concretely relates to divide defeated device for natural gas line.
Background
For a long time, high-performance pressure regulating controllers used for natural gas long-distance pipelines are basically imported equipment, in recent years, pressure regulating controllers of some domestic regulating valves appear in the industry of natural gas pipelines, but due to the reasons of insufficient automatic control technical experience or insufficient hardware performance of the controllers, the functions and the performance of the domestic valve controllers reach the level of the imported pressure regulating controllers. Some manufacturers adopt a low-end RTU as a valve control core, which can reduce hardware cost, but cause insufficient performance of the controller, and restrict the overall function and performance. Another part of manufacturers adopt the PLC as a valve control core, and although hardware performance can be guaranteed, since the programming adopts a standard PLC language, the limitation is too large, advanced control algorithms cannot be adopted, accurate flow estimation cannot be realized, and a multi-branch flow regulation function cannot be realized.
The valve control system function of the domestic natural gas long-distance pipeline is analyzed, and some problems and defects exist, and the method specifically comprises the following steps:
at present, the high-performance voltage regulation controller technology is mostly monopolized by foreign companies, and although the performance of the high-performance voltage regulation controller can meet the requirements, the high-performance voltage regulation controller has the defects of high equipment cost, long supply period, no spare parts and the like. Moreover, as the whole set of system is provided by foreign enterprises, the system function can not be continuously optimized according to domestic requirements, and the system can not adapt to continuously improved production operation management requirements;
some branch transmission stations are not provided with high-performance valve controllers, and cannot realize automatic flow distribution and flow control functions; or a valve controller independently developed by a domestic manufacturer is adopted, so that the functions and the performances of the valve controller are insufficient, for example, the problems of low regulation speed, large overshoot, poor system reliability and the like cannot meet the use requirements of long-distance natural gas pipelines.
For the working condition that the downstream pipe capacity of the branch transmission station is large, the overshoot and the response time are mutually contradictory, namely the overshoot and the response time cannot obtain a small optimal value, and the problem that the response time is long or the overshoot is easy to occur exists.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model discloses a main aim at provides a divide defeated device for natural gas line aims at solving and is used for dividing the current problem that defeated device governing speed is slow, the regulation precision is low and the overshoot is big etc..
The utility model aims at realizing through the following technical scheme:
a distribution and transmission device for a natural gas pipeline comprises a pressure regulating controller, a regulating valve and a process pipeline matched with the regulating valve, wherein a digital sensor is arranged on the process pipeline, and the pressure regulating controller controls the regulating valve according to parameters acquired by the digital sensor; and a fuzzy control module is arranged in the pressure regulating controller and is electrically connected with the pressure regulating controller.
Preferably, wherein the digital sensor comprises: a flow sensor for detecting a flow value on the process line; a pressure sensor for detecting a pressure value in the process line; and the valve position sensor is used for detecting the valve position opening of the regulating valve.
Preferably, the fuzzy control module controls the valve position opening of the regulating valve according to the deviation e of the pressure value obtained by the pressure sensor and the set value and the change rate ec thereof.
Preferably, the voltage regulation controller further comprises a liquid crystal display module, the liquid crystal display module is in communication connection with the voltage regulation controller, and the liquid crystal display module is used for inputting configuration parameters and displaying the configuration parameters and real-time parameters.
Preferably, the pressure regulating controller further comprises a storage module, the storage module is in communication connection with the pressure regulating controller, and the storage module is used for storing historical records and configuration information of the pressure regulating controller.
Preferably, the voltage regulating controller further comprises a mode switching module, the mode switching module is used for changing the working mode of the voltage regulating controller according to the control signal output by the voltage regulating controller, and the mode switching module is in communication connection with the voltage regulating controller.
Preferably, when the real-time pressure value is higher than the upper pressure limit value or lower than the lower pressure limit value, the pressure regulating controller controls the mode switching module to switch to flow regulation;
and when the real-time flow value is higher than the upper flow limit value, the pressure regulating controller controls the mode switching module to switch to pressure regulation.
Preferably, the system further comprises a natural gas day-designated automatic distribution and transmission system, and the natural gas day-designated automatic distribution and transmission system is in communication connection with the pressure regulating controller.
Compared with the prior art, the utility model discloses at least, following advantage has:
the utility model provides a divide defeated device for natural gas line, including pressure regulating controller, governing valve and the supporting technology pipeline with the governing valve, be provided with digital sensor on the technology pipeline, pressure regulating controller controls the governing valve according to the parameter that digital sensor obtained; when the pressure regulating device is used specifically, each user terminal is provided with one pressure regulating controller, an operator inputs configuration parameters into the pressure regulating controller through an operation interface, and meanwhile, the pressure regulating controller monitors the flow value, the pressure value and the valve position opening value of each user terminal in real time; when the real-time pressure value in the process pipeline is monitored to be higher than the upper pressure limit value or lower than the lower pressure limit value, switching to flow regulation; when the real-time flow value in the process pipeline is monitored to be higher than the upper flow limit value, switching to pressure regulation is carried out, and each user terminal only needs to be provided with one pressure regulating controller which is used for directly receiving the flow value, the pressure value and the valve position opening value of the user terminal, so that the data transmission link is reduced, the response time of the distribution and transmission device is greatly prolonged, and the regulation speed is high; simultaneously, for the great operating mode of defeated station low reaches pipe capacity of branch, set up fuzzy control module in the pressure regulating controller, can be guaranteeing to divide under the condition of defeated device governing speed, effectively reduce the overshoot for divide defeatedly more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of a dispensing device provided in the present application;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in 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 efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The description in this application as relating to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Example 1
As shown in fig. 1, a distribution device for a natural gas pipeline comprises a pressure regulating controller 2, a regulating valve 3 and a process pipeline matched with the regulating valve 3, wherein a digital sensor 5 is arranged on the process pipeline, and the digital sensor 5 comprises: a flow sensor 51 for detecting a flow value on the process line; a pressure sensor 52 for detecting a pressure value in the process line; a valve position sensor 53 for detecting a valve position opening degree of the regulating valve 3; the pressure regulating controller 2 controls the regulating valve 3 according to the parameters acquired by the digital sensor 5; when the pressure regulating device is used specifically, each user terminal is provided with one pressure regulating controller, an operator inputs configuration parameters into the pressure regulating controller 2 through an operation interface, and meanwhile, the pressure regulating controller 2 monitors the flow value, the pressure value and the valve position opening value of each user terminal in real time; when the real-time pressure value in the process pipeline is monitored to be higher than the upper pressure limit value or lower than the lower pressure limit value, switching to flow regulation, and simultaneously controlling the valve position opening of the regulating valve; and when the real-time flow value in the process pipeline is higher than the upper flow limit value, switching to pressure regulation and controlling the valve position opening of the regulating valve. Each user terminal only needs to be provided with one pressure regulating controller, and the pressure regulating controller is used for directly receiving the flow value, the pressure value and the valve position opening value of the user terminal, so that the data transmission link is reduced, and the response speed of the distribution device is greatly improved;
meanwhile, aiming at the working condition that the downstream pipe capacity of the sub-transmission station 6 is large, the overshoot and the response time are mutually contradictory, namely the overshoot and the response time cannot obtain a small optimal value, in order to improve the regulation speed and reduce the overshoot, a fuzzy control module 24 is arranged in the pressure regulating controller 2, the fuzzy control module 24 is electrically connected with the pressure regulating controller 2, specifically, the deviation e and the change rate ec of the measured value and the set value of the pressure regulating controller 2 are used as two input quantities, the defuzzification numerical value of the dynamic change under the action of proportion, integral and differential is obtained through reasoning of a fuzzy algorithm and used as a corresponding control output quantity, and the preset pressure regulating controller is correspondingly combined to control the valve position opening of the regulating valve, so that the overshoot of the system can be restrained as much as possible under the condition that the regulation speed of the system is accelerated. The fuzzy control algorithm in the present application belongs to the prior art, for example, a branch transmission voltage regulating system based on fuzzy control is disclosed in patent No. 201721128406.3 for those skilled in the art; and controllers including control algorithm modules are also commercially available.
Therefore, the pressure regulating controller added with the fuzzy control module, the pressure regulating controller on the current market and the pressure regulating controller not added with the fuzzy control module are tested and verified on site in the petrochemical direction in the average transmission station:
the test result of the voltage regulation controller without the fuzzy control module is as follows: the pressure regulating controller regulates the pressure, and the pressure set value is regulated from 4.61MPa to 4.71 MPa; the adjusting time is 15 minutes, 10 minutes beyond the index requirement, the analysis reason is that the downstream is the medium petrochemical safety direction, and the downstream user has larger management capacity;
the test result of the voltage regulation controller on the market at present is as follows: the pressure regulating controller regulates the pressure, and the pressure set value is regulated from 4.62MPa to 4.71 MPa; the adjusting time is more than 30 minutes and exceeds 10 minutes required by the index, the downstream user has larger pipe capacity because the downstream is the medium petrochemical safety direction, and in addition, the parameter setting of the valve controller is not optimized, so that the adjusting speed is slower.
The test result of the voltage regulation controller added with the fuzzy control module is as follows: the pressure regulating controller regulates the pressure, and the pressure set value is regulated from 4.62MPa to 4.72 MPa; the adjusting time is 8 minutes and is less than 10 minutes required by the index; the steady state error is 0.01MPa, and the steady state precision is 0.1%; the overshoot is 0.01MPa and is far less than 0.1MPa, namely, the pressure regulating controller additionally provided with the fuzzy control module can accelerate the regulation speed of pressure control, reduce the overshoot and improve the regulation precision.
Example 2
On the basis of the embodiment 1, the voltage regulation controller 2 further includes a mode switching module 23, the mode switching module 23 is configured to change a working mode of the voltage regulation controller according to a control signal output by the voltage regulation controller 2, and the mode switching module is in communication connection with the voltage regulation controller. The working principle of the mode switching module is as follows: when the real-time pressure value is higher than the upper pressure limit value or lower than the lower pressure limit value, the pressure regulating controller controls the mode switching module to switch to flow regulation; when the real-time flow value is higher than the upper limit value of the flow, the pressure regulating controller controls the mode switching module to be switched to pressure regulation, so that the pressure and flow balance control function is realized, namely, the upper limit protection of the flow during pressure regulation is realized, and the upper limit value protection and the lower limit value protection of the flow during flow regulation are realized.
Preferably, in another preferred technical solution of this embodiment, the pressure regulating controller 2 is further provided with an external feedback module 25, the external feedback module 25 is configured to compare the real-time parameter obtained by the digital sensor 5 with a set parameter, and calculate a control quantity by checking the digital sensor, and the control quantity is used to control a corresponding regulating valve to perform gas transmission control; the controller can further perform continuous iteration on the control quantity, specifically, when the pressure regulating controller compares the received real-time parameters with the configuration parameters to calculate the control quantity, when the real-time control quantity changes by 2% compared with the reuse control quantity, automatic updating iteration is performed, and the control quantity after continuous iteration is used for controlling a corresponding regulating valve to perform gas transmission control, so that the gas distribution and output quantity is more accurate.
Preferably, in a preferred technical solution of the present embodiment, the pressure regulating controller 2 further includes a valve position control rate module 26, and the valve position control rate module 26 is configured to set a valve position change rate of the regulating valve, which is generally set to 1%/second, and this setting is favorable for smooth transition of the pressure regulating controller in controlling the opening and closing processes of the regulating valve, and no large fluctuation or overshoot occurs.
Preferably, in a preferred technical solution of this embodiment, the system further includes a natural gas day designation automatic distribution system 1, and the natural gas day designation automatic distribution system 1 is in communication connection with the pressure regulating controller 2. The automatic daily-assigned natural gas distribution system can refer to the following patents: the applicant: the Beijing eastern Huazhi Petroleum engineering Co., Ltd applied for patent number 201710423267.5 on 2017, 06 month 07: according to the method and the system for automatically distributing and transporting the natural gas, the set pressure value and flow value on the process pipeline are obtained through the technical scheme of the patent, so that the effects that the automatic distribution and transportation based on an energy metering mode is realized, and the error of the daily specified completion rate is less than 1 percent are achieved.
Example 3
On the basis of the embodiment 1 and/or the embodiment 2, the voltage regulation controller 2 further includes a liquid crystal display module 21, the liquid crystal display module 21 is in communication connection with the voltage regulation controller 2, and the liquid crystal display module 21 is used for inputting configuration parameters and displaying the configuration parameters and real-time parameters. The configuration parameters comprise a flow value, a pressure upper limit value, a pressure lower limit value, a valve position opening upper limit value and the like, the real-time parameters comprise a flow value, a pressure value, a valve position opening value and the like, and the configuration parameters and the real-time parameters can be visually seen through the setting, so that the device is convenient and practical.
Preferably, in a preferred technical solution of this embodiment, the voltage regulation controller 2 further includes a storage module 22, the storage module 22 is in communication connection with the voltage regulation controller 2, and the storage module 22 is configured to store the history and the configuration information of the voltage regulation controller 2. Due to the arrangement of the storage module, an operator can conveniently check the fault reason and optimize data of the operating parameters of the pressure regulating controller, and technical support is provided for the convenience and practicability of the pressure regulating controller.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A distribution and transmission device for a natural gas pipeline is characterized by comprising a pressure regulating controller, a regulating valve and a process pipeline matched with the regulating valve, wherein a digital sensor is arranged on the process pipeline, and the pressure regulating controller controls the regulating valve according to parameters acquired by the digital sensor; and a fuzzy control module is arranged in the pressure regulating controller and is electrically connected with the pressure regulating controller.
2. The dispensing device for natural gas pipelines according to claim 1, wherein said digital sensor comprises: a flow sensor for detecting a flow value on the process line; a pressure sensor for detecting a pressure value in the process line; and the valve position sensor is used for detecting the valve position opening of the regulating valve.
3. The distribution and delivery device for a natural gas pipeline according to claim 2, wherein the fuzzy control module controls the valve position opening of the regulating valve according to the deviation e of the pressure value obtained by the pressure sensor from the set value and the change rate ec thereof.
4. The distribution and transportation device for the natural gas pipeline according to claim 1, wherein the pressure regulating controller further comprises a liquid crystal display module, the liquid crystal display module is in communication connection with the pressure regulating controller, and the liquid crystal display module is used for inputting configuration parameters and displaying the configuration parameters and real-time parameters.
5. The distribution transmission device for the natural gas pipeline according to claim 4, wherein the pressure regulating controller further comprises a storage module, the storage module is in communication connection with the pressure regulating controller, and the storage module is used for storing historical records and configuration information of the pressure regulating controller.
6. The distribution and transportation device for the natural gas pipeline according to claim 1, further comprising a mode switching module, wherein the mode switching module is used for changing the working mode of the pressure regulating controller according to the control signal output by the pressure regulating controller, and the mode switching module is in communication connection with the pressure regulating controller.
7. The distribution and transmission device for the natural gas pipeline according to claim 6, wherein when the real-time pressure value is higher than the upper pressure limit value or lower than the lower pressure limit value, the pressure regulating controller controls the mode switching module to switch to flow regulation;
and when the real-time flow value is higher than the upper flow limit value, the pressure regulating controller controls the mode switching module to switch to pressure regulation.
8. The distribution and transmission device for the natural gas pipeline according to claim 1, further comprising a natural gas day designation automatic distribution and transmission system, wherein the natural gas day designation automatic distribution and transmission system is in communication connection with the pressure regulation controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121261629.3U CN214744982U (en) | 2021-06-07 | 2021-06-07 | A divide defeated device for natural gas line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121261629.3U CN214744982U (en) | 2021-06-07 | 2021-06-07 | A divide defeated device for natural gas line |
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| Publication Number | Publication Date |
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| CN214744982U true CN214744982U (en) | 2021-11-16 |
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| CN202121261629.3U Active CN214744982U (en) | 2021-06-07 | 2021-06-07 | A divide defeated device for natural gas line |
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2021
- 2021-06-07 CN CN202121261629.3U patent/CN214744982U/en active Active
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Effective date of registration: 20230811 Address after: 100101 Beijing city Chaoyang District Datun Road No. 9 Patentee after: National Pipe Network Group Beijing Pipeline Co.,Ltd. Address before: 100101 Beijing city Chaoyang District Datun Road No. 9 Patentee before: National Pipe Network Group Beijing Pipeline Co.,Ltd. Patentee before: ORIENT HUAZHI PETROLEUM ENGINEERING CO.,LTD. |