CN215569774U - Modified natural gas regulating valve - Google Patents
Modified natural gas regulating valve Download PDFInfo
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- CN215569774U CN215569774U CN202121208144.8U CN202121208144U CN215569774U CN 215569774 U CN215569774 U CN 215569774U CN 202121208144 U CN202121208144 U CN 202121208144U CN 215569774 U CN215569774 U CN 215569774U
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Abstract
The utility model discloses a modified natural gas regulating valve which comprises a pressure regulating unit, wherein the pressure regulating unit comprises two pressure regulators connected in series and a pressure regulating pry mechanism arranged above the pressure regulators, the pressure regulators are axial-flow pressure regulating valves, a pressure gauge is arranged between the two pressure regulators, a valve core stroke indicator is arranged in each axial-flow pressure regulating valve, and the movement directions of a valve core and a valve seat of each axial-flow pressure regulating valve are axial. The modified natural gas regulating valve is convenient to regulate and high in efficiency, overcomes the defects of the conventional natural gas pressure regulating station system, simplifies the installation and debugging of the natural gas pressure regulating station system, enables the system to meet the requirements of the conventional working conditions, and works stably and reliably.
Description
Technical Field
The utility model relates to the technical field of equipment transformation, in particular to a modified natural gas regulating valve.
Background
In the prior art, natural gas used by a gas turbine is conveyed to a natural gas pressure regulating station through an underground conveying pipeline by a natural gas pipe network, the natural gas from the natural gas pipe network is subjected to pressure regulation by the natural gas pressure regulating station and then is respectively conveyed to each gas turbine, the problems of aging of the model of a pressure regulating valve, difficulty in purchasing damaged parts and incapability of timely updating, imperfect monitoring means of the pressure regulating process and the like can occur when a pressure regulating unit in the existing natural gas pressure regulating station is used for a long time, the problems of system pressure regulation failure, pressure fluctuation in a pipe and the like are caused, particularly, the problems of failure of the pressure regulating valve, overhigh natural gas pressure in the pipe and the like frequently occur during starting, the problems of starting of a pipeline safety valve, incapability of starting the gas turbine and the like are caused, the production safety is seriously threatened, the production efficiency is influenced, and the gas turbine needs to be modified and replaced.
The natural gas pressure regulating station is usually arranged according to a unit and a pressure regulating unit, each set of pressure regulating unit is provided with 2 pressure regulating branches, and 2 pressure regulating branches work simultaneously during operation. Each branch is formed by connecting 2 EZR type pressure regulating valves in series, one of the two pressure regulating valves is a working regulating valve, the other one of the two pressure regulating valves is a monitoring regulating valve, and when the working regulating valve fails, the monitoring regulating valve is involved in working. The pressure regulating valve adopted by the pressure regulating unit is a FISHER mechanical automatic tracking pressure regulating valve, the model is EZR, the pressure regulating valve is used for more than ten years from capital construction, and the pressure regulating valve is not integrally replaced, and the pressure regulating valve has the following problems in the prior use:
1. the service time of the valve is too long, and parts in the pressure regulating valve are abraded, so that the matching error of the parts is large, the pressure regulating valve cannot work normally and stably, and even newly replaced parts are damaged.
Typically, as the fit clearance of the parts within the valve becomes large, the lateral forces during component movement are in the excessive clearance fit causing the valve stem to rigidly deform. This rigid deformation in turn causes the valve element to jam and the valve element to close less tightly.
The second typical failure is that the sealing surfaces of the diaphragms are not overlapped, and the main valve diaphragm of one of the sealing pairs of the valve is obviously found after being detached: the sealing surfaces are not overlapped, namely the opening and closing actions of the valve cannot be repeated, the abrasion is not uniform in one circle of the sealing surface of the sealing pair, and some places have two sealing traces and some places do not have any sealing traces. Under the conditions, when the flow rate is switched, the valve leakage is easily caused, the pressure behind the valve is continuously increased, and the problem that the pressure of a system behind the valve is uncontrollably increased is caused.
2. The current design and arrangement of the pressure regulating unit lack the necessary system state monitoring and recording and the like,
a) close proximity of the two regulators: one of the two voltage regulators on the single line is used for daily work, and the other one is used for monitoring, so that the working voltage regulator can be prevented from continuously working instead of the working voltage regulator once the working voltage regulator is damaged to cause failure. Because the two pressure regulators are in the GLOBE form, the fluid in the front-stage runner flows to the latter pressure regulator after the flow direction is changed twice, and when the flow direction is changed again, the fluid can flow in the middle of the two pressure regulators to cause unstable pressure, and the influence is particularly obvious when the front stage is used as a working pressure regulator.
b) As an overvoltage protection system in a WIDE-OPEN form, the most obvious judgment of whether a working pressure regulator fails or not is made by observing the pressure of a section of pipeline between two pressure regulators, but the judgment of whether the working pressure regulator fails or not is difficult because the two pressure regulators are installed too close to each other at present and a pressure gauge cannot be installed in the middle. Once the working pressure regulator fails, although the whole system can still normally regulate the pressure under the action of the monitoring pressure regulator, once the working pressure regulator is not maintained in time, the pressure regulator to be monitored also fails, and the whole pressure loop has a larger problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a natural gas regulating valve retrofit device, which solves the technical problems that parts of a pressure regulating valve of a natural gas pressure regulating unit are easy to damage and the system design is insufficient in the prior art, corrects the defects of the current natural gas pressure regulating station system, simplifies the installation and debugging of the natural gas pressure regulating station system, enables the system to meet the requirements of the current working condition, and works stably and reliably.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a natural gas regulating valve remodeling device which comprises a pressure regulating unit, wherein the pressure regulating unit comprises two pressure regulators connected in series and a pressure regulating pry mechanism arranged above the pressure regulators, each pressure regulator is an axial-flow type pressure regulating valve, a pressure gauge is arranged between the two pressure regulators, a valve core stroke indicator is arranged in each axial-flow type pressure regulating valve, and the movement directions of a valve core and a valve seat of each axial-flow type pressure regulating valve are axial.
Further, the axial-flow type regulating valve comprises a valve body, a valve seat arranged inside the valve body, a valve core fixedly arranged on the valve seat, a pressure regulator spring arranged on the valve core, a diaphragm arranged inside the valve body and a cavity arranged inside the valve body.
Further, the chambers include an outlet pressure chamber and a load pressure chamber.
Furthermore, an SR type noise reducer is further arranged on the axial flow type pressure regulating valve.
Further, pressure regulating sled mechanism is including setting up the pressure regulating sled of pressure regulator top is in with the setting monitoring table meter on the pressure regulating sled.
Further, the pressure regulating unit is respectively connected with the pipeline and the flange.
By adopting the technical scheme, the utility model has the following advantages:
the utility model provides a natural gas regulating valve retrofit device.A pressure regulating unit adopts an axial flow type pressure regulating valve, so that the regulation is convenient and fast, and the efficiency is high; the axial flow type pressure regulating valve is provided with a valve core stroke indicator which can be used for assisting in judging whether the valve is in a working state or not and is convenient for daily inspection and monitoring; the pressure gauge is arranged between the two pressure regulators, the working operation state of the working pressure regulating valve can be visually judged, the arrangement of the two monitoring means provides powerful guarantee for effectively monitoring the operation and equipment state of the pressure regulating mechanism of the pressure regulating pry, the pressure regulating is stable, and the fluctuation is small.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a diagram of a pressure regulating unit arrangement of the present invention;
fig. 2 is a structural view of an axial flow pressure regulating valve of the present invention.
Detailed Description
The technical solutions of the present invention are described in detail below with reference to the accompanying drawings, and the detailed features and advantages of the present invention are described in detail in the detailed description, which is sufficient for anyone skilled in the art to understand the technical contents of the present invention and implement the present invention, and the related objects and advantages of the present invention can be easily understood by those skilled in the art from the description, the claims and the accompanying drawings disclosed in the present specification.
Fig. 1 shows a layout of a pressure regulating unit of the utility model, and a natural gas regulating valve retrofit device is shown in fig. 1 and comprises the pressure regulating unit, wherein the pressure regulating unit is optimized and improved relative to components and systems of the original pressure regulating unit, and comprises two pressure regulators connected in series and a pressure regulating pry mechanism which is positioned above the pressure regulators and is fixedly installed above the pressure regulators.
In one embodiment, the pressure regulator comprises two pressure regulators, namely a working pressure regulating valve 1 and a monitoring pressure regulating valve 2, and a pressure gauge 4 is fixedly arranged between the working pressure regulating valve 1 and the monitoring pressure regulating valve 2, so that the operating state of the working pressure regulating valve can be visually judged. The pressure regulating unit is respectively connected with the pipeline 3 and the flange 5, the pressure regulating unit can be debugged by connecting the pipeline 3 in advance, and the flange 5 is directly installed on the site for connection, so that the inconvenience of directly connecting a gas pipe for debugging on the site is avoided.
Pressure regulating sled mechanism includes the monitoring table meter of fixed mounting pressure regulating sled 14 and fixed mounting on the pressure regulating sled of pressure regulator top, every monitoring table meter all includes the monitoring table meter 15 of import and the monitoring table meter 16 of export, pressure regulating sled 14's control reasonable in design, be convenient for patrol and examine monitoring pressure regulating valve operation operating condition, pressure regulating sled 14 reforms transform the back, because axial-flow type pressure regulating valve is several times higher than HZR type pressure regulating valve frequency, the influence of upper reaches natural gas pipe network inlet pressure fluctuation has basically been eliminated, the operating condition lasts to remain stable, it is unstable not taking place the pressure regulating sled pressure regulating, the pressure fluctuation condition, the gas pressure of gas turbine has been guaranteed effectively and has lasted stably.
Fig. 2 shows a structural diagram of an axial pressure regulating valve according to the present invention, and the pressure regulator is an axial pressure regulating valve as shown in fig. 2, and the axial pressure regulating valve has an advantage over the original GLOBE type pressure regulator (EZR type) in that the flow direction of the fluid does not need to be changed during the pressure regulating process, so that the lateral force caused by the axial pressure regulating valve is much smaller; the axial-flow type governing valve includes valve body 6, valve seat 7 of fixed mounting in the valve body inside, and the case 8 of fixed mounting on the valve seat is established the pressure regulator spring 9 on the case 8, sets up at the diaphragm 10 and the cavity of fixed mounting in the valve body inside of valve body 6 inside. The chambers include an outlet pressure chamber 11 and a load pressure chamber 12. In addition, the axial-flow type valve core 8 and the valve seat 7 are in the axial direction, so that the abrasion of the pressure regulator caused by the lateral force is also small, the abrasion and the damage of parts in the valve can be reduced, and the service life is prolonged.
In addition, a valve core travel indicator 13 is fixedly installed on a valve core 8 in the axial-flow type pressure regulating valve, and the valve core travel indicator 13 can be used for assisting in judging whether the valve is in a working state or not, so that the valve is convenient to monitor in daily routing inspection, hidden dangers are timely found, and the valve is convenient to monitor in daily routing inspection.
In addition, the axial flow pressure regulating valve is also provided with an SR type noise reducer (not shown in the figure), so that the pipeline noise and vibration can be obviously reduced under the condition of large pressure difference and large flow, and the service life of the valve is prolonged.
Finally, it should be noted that while the present invention has been described with reference to the specific embodiments thereof, it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention, and various equivalent changes and substitutions may be made therein without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit and scope of the present invention be covered by the appended claims.
Claims (6)
1. The utility model provides a natural gas governing valve modification device, a serial communication port, includes the pressure regulating unit, the pressure regulating unit includes two series connection's voltage regulator and sets up the pressure regulating sled mechanism in the voltage regulator top, the voltage regulator is axial-flow type air-vent valve, two be equipped with the manometer between the voltage regulator, be provided with case stroke indicator in the axial-flow type air-vent valve, the case of axial-flow type air-vent valve and the direction of motion of disk seat are the axial.
2. The natural gas regulating valve retrofit device of claim 1, wherein the axial flow type regulating valve comprises a valve body, a valve seat arranged inside the valve body, a valve core fixedly arranged on the valve seat, a pressure regulator spring sleeved on the valve core, a diaphragm arranged inside the valve body and a cavity arranged inside the valve body.
3. The natural gas regulator valve retrofit device of claim 2, wherein the chamber comprises an outlet pressure chamber and a load pressure chamber.
4. The natural gas regulating valve retrofit device of claim 2 wherein said axial pressure regulating valve is further provided with an SR type noise reducer.
5. The natural gas regulating valve retrofit device of claim 1, wherein the pressure regulating lever mechanism comprises a pressure regulating lever disposed above the pressure regulator and a watch gauge disposed on the pressure regulating lever.
6. The natural gas regulating valve retrofit device of claim 1, wherein the pressure regulating unit is connected to a pipeline and a flange, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121208144.8U CN215569774U (en) | 2021-06-01 | 2021-06-01 | Modified natural gas regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121208144.8U CN215569774U (en) | 2021-06-01 | 2021-06-01 | Modified natural gas regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215569774U true CN215569774U (en) | 2022-01-18 |
Family
ID=79865376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121208144.8U Active CN215569774U (en) | 2021-06-01 | 2021-06-01 | Modified natural gas regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215569774U (en) |
-
2021
- 2021-06-01 CN CN202121208144.8U patent/CN215569774U/en active Active
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