CN111237485A - Valve for monitoring gas flow in real time and valve flow measuring method - Google Patents
Valve for monitoring gas flow in real time and valve flow measuring method Download PDFInfo
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- CN111237485A CN111237485A CN202010055846.0A CN202010055846A CN111237485A CN 111237485 A CN111237485 A CN 111237485A CN 202010055846 A CN202010055846 A CN 202010055846A CN 111237485 A CN111237485 A CN 111237485A
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- valve
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- outlet
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- pressure sensor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Abstract
The invention discloses a valve for monitoring gas flow in real time and a valve flow measuring method. The sleeve is arranged in the middle cavity of the valve body, and two ends of the sleeve are respectively supported with the valve body and the valve cover; the valve cover center is provided with a through hole, the valve rod enters the valve body middle cavity through the valve cover center through hole, the bottom of the valve rod is connected with the valve core at the sleeve center, and the valve core can move up and down along the valve rod axial direction under the driving of the valve rod; an inlet pressure sensor and a temperature sensor are mounted on the side wall of the valve inlet pipeline, a rectifying device is mounted in the valve inlet and outlet pipeline, and an outlet pressure sensor is mounted on the side wall of the valve outlet pipeline; and each pressure sensor is respectively connected and communicated with the flow data processing module. The invention integrates the flow measurement function into the valve, detects the gas flow passing through the valve in real time, and is convenient and efficient; the structure is compact, the volume is small, and the installation space is saved; turbulent flow inside the valve, gas compressibility and temperature influence are considered in the measuring process, and the measuring accuracy is high.
Description
Technical Field
The invention relates to the field of gas flow metering and valves, in particular to a valve for monitoring gas flow in real time.
Background
Valves and gas flow meters are indispensable equipment in gas pipelines. In the prior art, the valve and the gas flowmeter are usually installed in the pipeline as two independent devices in a split manner, and thus the split installation has the following problems: firstly, long pipelines are needed before and after the installation position of the gas flowmeter as a necessary condition for flow measurement, the installation position of the pipeline is occupied, and the installation space is wasted; secondly, increase installation time, reduce the efficiency of construction, extravagant manpower.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the valve for monitoring the gas flow in real time, which has the advantages of compact structure and small volume, and can monitor and display the flow of the valve in real time while realizing the normal opening and closing function of the valve.
The invention specifically adopts the technical scheme that:
a valve for monitoring gas flow in real time comprises a valve body, a valve cover, a valve core, a valve rod, a sleeve, an inlet temperature sensor, an inlet pressure sensor, an inlet rectifying device, an outlet pressure sensor, an outlet rectifying device and a flow data processing module;
the sleeve is arranged in the middle cavity of the valve body, and two ends of the sleeve are respectively fixed on the valve body and the valve cover; the valve cover is provided with a through hole in the center, the valve rod enters the middle cavity of the valve body through the through hole in the center of the valve cover, the bottom of the valve rod is connected with the valve core in the center of the sleeve, and the valve core can move up and down along the axial direction of the valve rod under the driving of the valve rod; an inlet pressure sensor and a temperature sensor are mounted on the side wall of the valve inlet pipeline, an inlet rectifying device is mounted in the valve inlet pipeline, an outlet pressure sensor is mounted on the side wall of the valve outlet pipeline, and an outlet rectifying device is mounted in the valve outlet pipeline; the inlet temperature sensor, the inlet pressure sensor and the outlet pressure sensor are respectively connected and communicated with the flow data processing module; the flow data processing module receives signals from the inlet temperature sensor, the inlet pressure sensor and the outlet pressure sensor, processes and operates the signals and displays real-time flow.
Preferably, the valve inlet is communicated with the valve outlet through a sleeve of the valve body middle cavity, and the axis of the valve inlet is coincident with or parallel to the axis of the valve outlet.
Preferably, the valve further comprises a sealing packing and a packing gland, the valve cover is connected with the valve body through a bolt, and the valve cover and the valve rod are sealed through the sealing packing and the packing gland.
Preferably, the packing gland and the valve cover are connected through a bolt.
Preferably, import fairing and export fairing comprise rectifying plate and rectifying plate stay tube at center, and the rectifying plate is all installed to the inside different height departments of rectifying plate stay tube, and the rectifying plate both ends are fixed through the recess of rectifying plate stay tube inner wall, constitute the rectification passageway that supplies fluid to pass through between two upper and lower rectifying plates.
Preferably, the cross section of the rectifying plate is rectangular, and the rectifying plates inside the rectifying plate supporting tube are parallel to each other.
Preferably, the valve inlet line side wall mounted temperature and pressure sensors are located upstream of the inlet fairing and the valve outlet line side wall mounted pressure sensor is located downstream of the outlet fairing.
Another object of the present invention is to provide a method for measuring flow rate using the valve of any of the above aspects, wherein the measuring steps are as follows
S1: before the valve is arranged on the pipeline, the flow data processing module is calibrated to obtain a coefficient K1、K2The calibration formula is as follows:
wherein: qSIn real time for valvesFlow rate; delta p is the inlet-outlet pressure difference of the valve; k1、K2The calibrated coefficient related to the size of the valve structure; p is a radical of1For valve inlet pressure, T1Is the valve inlet gas temperature; z1Is the compression factor of the working gas; gamma is the specific heat ratio of the working gas; m is the molar mass of the working gas;
s2: after the valve is installed in the pipeline, when the working gas passes through the valve, the flow data processing module acquires the inlet pressure p of the valve1Outlet pressure p2And inlet temperature T1Calculating the pressure difference delta p between the inlet and the outlet according to the pressure difference between the inlet and the outlet, and calculating the real-time flow of the gas passing through the valve according to the following formula:
the invention has the beneficial effects that:
the valve for monitoring the gas flow in real time integrates the flow measurement function into the valve for pipeline control, can detect the gas flow passing through the valve in real time, and is convenient and efficient; the structure is compact, the volume is small, and the length of a pipeline required by valve flow measurement is saved; the valve flow measuring method provided by the invention simultaneously considers the turbulent flow inside the valve, the gas compressibility and the temperature influence, and has higher measuring precision.
Drawings
FIG. 1 is a schematic diagram of a valve for monitoring gas flow in real time in accordance with the present invention;
FIG. 2 is a cross-sectional view of an inlet and outlet fairing in accordance with the invention;
in the figure: 1. a valve inlet; 2. an inlet fairing; 3. a valve body; 4. a sleeve; 5. a valve stem; 6. a valve core; 7. an outlet fairing; 8. a valve outlet; 9. an outlet pressure sensor; 10. sealing and filling; 11 a packing gland; 12. a valve cover; 13. a flow data processing module; 14. an inlet pressure sensor; 15. an inlet temperature sensor; 16. a rectifying plate supporting tube; 17. a rectifying plate.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings and specific examples. It should be understood that the specific examples described herein are intended to be illustrative only and are not intended to be limiting.
As shown in fig. 1, in the present embodiment, a valve for monitoring a gas flow in real time includes a valve body 3, a valve cover 12, a valve core 6, a valve rod 5, a sleeve 4, a packing 10, a packing gland 11, an inlet temperature sensor 15, an inlet pressure sensor 14, an inlet rectifying device 2, an outlet pressure sensor 9, an outlet rectifying device 7, and a flow data processing module 13.
Wherein the sleeve 4 is mounted in the cavity of the valve body 3, the bottom of the sleeve 4 is supported on the valve body 3, and the top is supported on the valve cover 12. The valve cover 12 is connected with the valve body 1 through a bolt, a through hole is formed in the center of the valve cover 12, the valve rod 5 enters the middle cavity of the valve body 3 through the through hole in the center of the valve cover 12, the bottom of the valve rod 5 is connected with the valve core 6 in the center of the sleeve 4, and the valve core 6 can move up and down along the axial direction of the valve rod 5 under the driving of the valve rod 5. The valve inlet 1 is communicated with the valve outlet 8 through the sleeve 4 of the cavity in the valve body 3, and the axes of the valve inlet 1 and the valve outlet 8 are coincident or parallel. The valve cover 12 and the valve rod 5 are sealed by the sealing packing 10 and the packing gland 11. The packing gland 11 and the valve cover 12 are connected through bolts. The valve core 6 is used for controlling the opening and closing of the flow channel in the valve body, the flow channel is gradually opened when the valve core 6 moves upwards under the driving of the valve rod 5, the flow channel is gradually closed when the valve core moves downwards, the opening size of the flow channel can be controlled through the valve rod 5, and then the flow in the valve is adjusted.
The invention realizes the internal flow measurement through a plurality of sensors, and comprises an inlet temperature sensor 15, an inlet pressure sensor 14 and an outlet pressure sensor 9, wherein the inlet pressure sensor 14 and the temperature sensor 15 are arranged on the side wall of a pipeline at a valve inlet 1, and the outlet pressure sensor 9 is arranged on the side wall of a pipeline at a valve outlet 8. In order to ensure the accuracy of flow measurement and prevent fluid turbulence from causing measurement errors, an inlet rectifying device 2 is installed in a pipeline of a valve inlet 1, and an outlet rectifying device 7 is installed in a pipeline of a valve outlet 8. The valve inlet 1 line side wall mounted temperature sensor 15 and pressure sensor 14 are located upstream of the inlet fairing 2 and the valve outlet 8 line side wall mounted pressure sensor 9 is located downstream of the outlet fairing 7.
As shown in fig. 2, the inlet fairing 2 and the outlet fairing 7 have the same structural form, and are both composed of a central rectifying plate 17 and a rectifying plate support tube 16, the rectifying plates 17 are mounted at different heights inside the rectifying plate support tube 16, two ends of each rectifying plate 17 are fixed by grooves on the inner wall of the rectifying plate support tube 16, and a rectifying channel for fluid to pass through is formed between the upper rectifying plate 17 and the lower rectifying plate 17. The section of each rectifying plate 17 is rectangular, the rectifying plates 17 in the rectifying plate supporting tube 16 are parallel to each other, and the widths of the rectifying plates 17 at different heights are different and are consistent with the section width of the rectifying plate supporting tube 16 at the position. The outer diameter of the current plate support tube 16 is consistent with or slightly larger than the inner diameter of the pipeline at the installation position of the valve inlet 1 and the valve outlet 8 respectively, so that the current plate support tube can be fixed in the pipeline.
The inlet temperature sensor 15, the inlet pressure sensor 14 and the outlet pressure sensor 9 are respectively connected with the flow data processing module 13 for communication, and send the sensing data to the flow data processing module 13. The flow data processing module 13 receives signals from the inlet temperature sensor 15, the inlet pressure sensor 14 and the outlet pressure sensor 9, processes and calculates the signals, and displays real-time flow.
In this embodiment, the flow measuring method of the valve may adopt the following measuring steps
S1: before the valve is installed on the pipeline, the flow data processing module needs to be calibrated in advance to obtain the coefficient K1、K2The calibration formula is as follows:
wherein: qSIs the real-time flow of the valve; delta p is the inlet-outlet pressure difference of the valve; k1、K2The calibrated coefficient related to the size of the valve structure; p is a radical of1For valve inlet pressure, T1Is the valve inlet gas temperature; z1As compression factor of working gas(ii) a Gamma is the specific heat ratio of the working gas; m is the molar mass of the working gas.
In calibration, a known flow of gas is first introduced through the valve inlet 1 and the valve inlet pressure p is then detected1Outlet pressure p2And inlet temperature T1After the data of the sensors under different flow rates are obtained, the data can be used for the parameter K in the formula1、K2And calibrating to obtain a calibration value.
S2: after the valve is installed in the pipeline, when the working gas passes through the valve, the flow data processing module acquires the inlet pressure p of the valve1Outlet pressure p2And inlet temperature T1Calculating the pressure difference delta p between the inlet and the outlet according to the pressure difference between the inlet and the outlet, and calculating the real-time flow of the gas passing through the valve according to the following formula:
at this time, K1、K2The value of (b) is the calibration value in S1.
The calibration formula for flow calculation in the invention considers the influence of temperature change and gas compressibility on measurement in the derivation process, and also considers the influence of the increase of gas flow turbulence degree on gas properties, so that the flow measurement result has higher accuracy. By the device and the method, the real-time flow in the valve can be calculated without a complex and expensive gas flowmeter.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (8)
1. A valve for monitoring gas flow in real time is characterized in that: the flow control valve comprises a valve body (3), a valve cover (12), a valve core (6), a valve rod (5), a sleeve (4), an inlet temperature sensor (15), an inlet pressure sensor (14), an inlet rectifying device (2), an outlet pressure sensor (9), an outlet rectifying device (7) and a flow data processing module (13);
the sleeve (4) is arranged in the middle cavity of the valve body (3), and two ends of the sleeve (4) are respectively fixed on the valve body (3) and the valve cover (12); a through hole is formed in the center of the valve cover (12), the valve rod (5) enters the middle cavity of the valve body (3) through the central through hole of the valve cover (12), the bottom of the valve rod (5) is connected with a valve core (6) in the center of the sleeve (4), and the valve core (6) can move up and down along the axial direction of the valve rod (5) under the driving of the valve rod (5); an inlet pressure sensor (14) and a temperature sensor (15) are installed on the side wall of a pipeline of the valve inlet (1), an inlet rectifying device (2) is installed in the pipeline of the valve inlet (1), an outlet pressure sensor (9) is installed on the side wall of a pipeline of the valve outlet (8), and an outlet rectifying device (7) is installed in the pipeline of the valve outlet (8); the inlet temperature sensor (15), the inlet pressure sensor (14) and the outlet pressure sensor (9) are respectively connected and communicated with the flow data processing module (13); and the flow data processing module (13) receives signals from the inlet temperature sensor (15), the inlet pressure sensor (14) and the outlet pressure sensor (9), processes and calculates the signals and displays real-time flow.
2. The valve of claim 1, wherein: the valve inlet (1) is communicated with the valve outlet (8) through a sleeve (4) of the middle cavity of the valve body (3), and the axes of the valve inlet (1) and the valve outlet (8) are coincident or parallel.
3. The valve of claim 1, wherein: the valve cover (12) is connected with the valve body (3) through bolts, and the valve cover (12) is sealed with the valve rod (5) through the sealing packing (10) and the packing gland (11).
4. A valve for real-time monitoring of gas flow as claimed in claim 3, wherein: the packing gland (11) is connected with the valve cover (12) through bolts.
5. The valve of claim 1, wherein: import fairing (2) and export fairing (7) comprise cowling panel (17) and cowling panel stay tube (16) at center, and cowling panel (17) are all installed to cowling panel stay tube (16) inside not co-altitude department, and cowling panel (17) both ends are fixed through the recess of cowling panel stay tube (16) inner wall, constitute the rectification passageway that supplies the fluid to pass through between two upper and lower cowling panels (17).
6. The valve of claim 5, wherein: the cross section of the rectifying plate (17) is rectangular, and all the rectifying plates (17) in the rectifying plate supporting tube (16) are parallel to each other.
7. The valve of claim 1, wherein: the temperature sensor (15) and the pressure sensor (14) which are arranged on the side wall of the pipeline of the valve inlet (1) are positioned at the upstream of the inlet rectifying device (2), and the pressure sensor (9) which is arranged on the side wall of the pipeline of the valve outlet (8) is positioned at the downstream of the outlet rectifying device (7).
8. A flow measurement method using the valve according to any one of claims 1 to 7, characterized in that: the measurement procedure is as follows
S1: before the valve is arranged on the pipeline, the flow data processing module is calibrated to obtain a coefficient K1、K2The calibration formula is as follows:
wherein: qSIs the real-time flow of the valve; delta p is the inlet-outlet pressure difference of the valve; k1、K2The calibrated coefficient related to the size of the valve structure; p is a radical of1For valve inlet pressure, T1Is the valve inlet gas temperature; z1As a working gasThe compression factor of (2); gamma is the specific heat ratio of the working gas; m is the molar mass of the working gas;
s2: after the valve is installed in the pipeline, when the working gas passes through the valve, the flow data processing module acquires the inlet pressure p of the valve1Outlet pressure p2And inlet temperature T1Calculating the pressure difference delta p between the inlet and the outlet according to the pressure difference between the inlet and the outlet, and calculating the real-time flow of the gas passing through the valve according to the following formula:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010055846.0A CN111237485B (en) | 2020-01-17 | 2020-01-17 | Valve for monitoring gas flow in real time and valve flow measuring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010055846.0A CN111237485B (en) | 2020-01-17 | 2020-01-17 | Valve for monitoring gas flow in real time and valve flow measuring method |
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| CN111237485A true CN111237485A (en) | 2020-06-05 |
| CN111237485B CN111237485B (en) | 2021-01-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112647896A (en) * | 2020-12-21 | 2021-04-13 | 中海油田服务股份有限公司 | Valve system for measuring flow of underground multiphase fluid |
| CN112683206A (en) * | 2020-12-24 | 2021-04-20 | 中核苏阀科技实业股份有限公司 | Low-temperature ball valve seat inner leakage gap measuring device and method |
| CN113252338A (en) * | 2021-06-08 | 2021-08-13 | 浙江大学 | Detection device and estimation method for aerodynamic noise outside valve |
| CN114776875A (en) * | 2022-03-22 | 2022-07-22 | 四川华能氢能科技有限公司 | Hydrogen flow valve of hydrogen filling station and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112647896A (en) * | 2020-12-21 | 2021-04-13 | 中海油田服务股份有限公司 | Valve system for measuring flow of underground multiphase fluid |
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| CN113252338A (en) * | 2021-06-08 | 2021-08-13 | 浙江大学 | Detection device and estimation method for aerodynamic noise outside valve |
| CN114776875A (en) * | 2022-03-22 | 2022-07-22 | 四川华能氢能科技有限公司 | Hydrogen flow valve of hydrogen filling station and control method thereof |
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|---|---|
| CN111237485B (en) | 2021-01-19 |
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