CN111237485B - 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 PDF

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CN111237485B
CN111237485B CN202010055846.0A CN202010055846A CN111237485B CN 111237485 B CN111237485 B CN 111237485B CN 202010055846 A CN202010055846 A CN 202010055846A CN 111237485 B CN111237485 B CN 111237485B
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valve
inlet
outlet
pressure sensor
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CN111237485A (en
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金志江
仇畅
钱锦远
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Zhejiang University ZJU
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Zhejiang University ZJU
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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
    • 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
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Volume Flow (AREA)

Abstract

本发明公开了一种实时监测气体流量的阀门及阀门流量测量方法。本发明中套筒安装于阀体中腔，套筒两端分别与阀体、阀盖支撑；阀盖中心开有通孔，阀杆经阀盖中央通孔进入阀体中腔，阀杆底部与套筒中心的阀芯相连接，阀芯在阀杆带动下可沿阀杆轴向上下移动；阀门进口管路侧壁安装有进口压力传感器和温度传感器，阀门进出口管路内安装有整流装置，阀门出口管路侧壁安装有出口压力传感器；各压力传感器分别与流量数据处理模块连接通讯。本发明将流量测量功能集成于阀门之中，实时检测通过阀门的气体流量，方便高效；结构紧凑、体积小，节省安装空间；测量过程考虑阀门内部的湍流流动、气体可压缩性和温度影响，测量精度较高。

Figure 202010055846

The invention discloses a valve for real-time monitoring of gas flow and a valve flow measurement method. In the invention, the sleeve is installed in the middle cavity of the valve body, and the two ends of the sleeve are respectively supported with the valve body and the valve cover; a through hole is opened in the center of the valve cover, the valve stem enters the middle cavity of the valve body through the central through hole of the valve cover, and the bottom of the valve stem is connected to the valve body. The valve core in the center of the sleeve is connected, and the valve core can move up and down along the axial direction of the valve stem under the drive of the valve stem; the inlet pressure sensor and temperature sensor are installed on the side wall of the valve inlet pipeline, and the rectifier device is installed in the valve inlet and outlet pipeline , An outlet pressure sensor is installed on the side wall of the valve outlet pipeline; each pressure sensor is connected and communicated with the flow data processing module respectively. The invention integrates the flow measurement function into the valve, and detects the gas flow through the valve in real time, which is convenient and efficient; the structure is compact, the volume is small, and the installation space is saved; The measurement accuracy is high.

Figure 202010055846

Description

Valve for monitoring gas flow in real time and valve flow measuring method
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:
Figure BDA0002372775250000021
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; 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:
Figure BDA0002372775250000022
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:
Figure BDA0002372775250000041
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; 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.
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:
Figure BDA0002372775250000042
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 (7)

1.一种实时监测气体流量的阀门，其特征在于：包括阀体(3)、阀盖(12)、阀芯(6)、阀杆(5)、套筒(4)、进口温度传感器(15)、进口压力传感器(14)、进口整流装置(2)、出口压力传感器(9)、出口整流装置(7)和流量数据处理模块(13)；1. A valve for real-time monitoring of gas flow, characterized in that it comprises a valve body (3), a valve cover (12), a valve core (6), a valve stem (5), a sleeve (4), an inlet temperature sensor ( 15), an inlet pressure sensor (14), an inlet rectifier (2), an outlet pressure sensor (9), an outlet rectifier (7) and a flow data processing module (13); 所述的套筒(4)安装于阀体(3)中腔，套筒(4)两端分别固定于阀体(3)和阀盖(12)上；所述阀盖(12)中心开有通孔，所述阀杆(5)经阀盖(12)中心通孔进入阀体(3)中腔，阀杆(5)底部与套筒(4)中心的阀芯(6)相连接，阀芯(6)在阀杆(5)带动下可沿阀杆(5)轴向上下移动；阀门进口(1)管路侧壁安装有进口压力传感器(14)和温度传感器(15)，阀门进口(1)管路内安装有进口整流装置(2)，阀门出口(8)管路侧壁安装有出口压力传感器(9)，阀门出口(8)管路内安装有出口整流装置(7)；所述进口温度传感器(15)、进口压力传感器(14)和出口压力传感器(9)分别与流量数据处理模块(13)连接通讯；所述流量数据处理模块(13)接收来自进口温度传感器(15)、进口压力传感器(14)和出口压力传感器(9)的信号并进行处理运算、显示实时流量；The sleeve (4) is installed in the central cavity of the valve body (3), and both ends of the sleeve (4) are respectively fixed on the valve body (3) and the valve cover (12); the valve cover (12) is open in the center. There is a through hole, the valve stem (5) enters the middle cavity of the valve body (3) through the central through hole of the valve cover (12), and the bottom of the valve stem (5) is connected with the valve core (6) in the center of the sleeve (4) , the valve core (6) can move up and down along the axis of the valve stem (5) driven by the valve stem (5). 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 the valve outlet (8) pipeline, 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); the flow data processing module (13) receives data from the inlet temperature sensor (15), the signals of the inlet pressure sensor (14) and the outlet pressure sensor (9) are processed and calculated, and the real-time flow is displayed; 测量步骤如下The measurement steps are as follows S1：在阀门安装于管路之前，对流量数据处理模块进行标定，得出系数K1、K2的值，标定公式为：S1: Before the valve is installed in the pipeline, the flow data processing module is calibrated, and the values of the coefficients K 1 and K 2 are obtained. The calibration formula is:
Figure FDA0002743410070000011
Figure FDA0002743410070000011
 其中：QS为阀门的实时流量；Δp为阀门的进出口压差；K1、K2为已标定的与阀门结构尺寸相关的系数；p1为阀门进口压力，T1为阀门进口气体温度；Z1为工作气体的压缩系数；γ为工作气体的比热比；M为工作气体的摩尔质量；Among them: Q S is the real-time flow of the valve; Δp is the inlet and outlet pressure difference of the valve; K 1 , K 2 are the calibrated coefficients related to the valve structure size; p 1 is the valve inlet pressure, T 1 is the valve inlet gas temperature ; Z 1 is the compression coefficient of the working gas; γ is the specific heat ratio of the working gas; M is the molar mass of the working gas; S2：在阀门安装于管路中后，工作气体通过该阀门时，流量数据处理模块获取该阀门进口压力p1、出口压力p2和进口温度T1，根据进出口压力计算进出口压差Δp，再按照下式计算通过阀门气体的实时流量：S2: After the valve is installed in the pipeline, when the working gas passes through the valve, the flow data processing module obtains the valve inlet pressure p 1 , outlet pressure p 2 and inlet temperature T 1 , and calculates the inlet and outlet pressure difference Δp according to the inlet and outlet pressures , and then calculate the real-time flow of gas through the valve according to the following formula:
Figure FDA0002743410070000012
Figure FDA0002743410070000012
 2.根据权利要求1所述的一种实时监测气体流量的阀门，其特征在于：所述阀门进口(1)经阀体(3)中腔的套筒(4)与阀门出口(8)连通，阀门进口(1)与阀门出口(8)的轴线重合或平行。2. The valve for real-time monitoring of gas flow according to claim 1, wherein the valve inlet (1) is communicated with the valve outlet (8) through the sleeve (4) in the middle cavity of the valve body (3). , the axis of the valve inlet (1) and the valve outlet (8) are coincident or parallel. 3.根据权利要求1所述的一种实时监测气体流量的阀门，其特征在于：还包括密封填料(10)和填料压盖(11)，所述阀盖(12)与阀体(3)间通过螺栓进行连接，阀盖(12)与阀杆(5)间通过密封填料(10)和填料压盖(11)进行密封。3. A valve for real-time monitoring of gas flow according to claim 1, characterized in that it further comprises a sealing packing (10) and a packing gland (11), the valve cover (12) and the valve body (3) The valve cover (12) and the valve stem (5) are connected by bolts, and the valve cover (12) and the valve stem (5) are sealed by the sealing packing (10) and the packing gland (11). 4.根据权利要求3所述的一种实时监测气体流量的阀门，其特征在于：所述填料压盖(11)与阀盖(12)间通过螺栓进行连接。4 . The valve for real-time monitoring of gas flow according to claim 3 , wherein the packing gland ( 11 ) and the valve cover ( 12 ) are connected by bolts. 5 . 5.根据权利要求1所述的一种实时监测气体流量的阀门，其特征在于：所述进口整流装置(2)和出口整流装置(7)由中心的整流板(17)和整流板支撑管(16)组成，整流板支撑管(16)内部不同高度处均安装有整流板(17)，整流板(17)两端通过整流板支撑管(16)内壁的凹槽进行固定，上下两块整流板(17)之间构成供流体通过的整流通道。5. the valve of a kind of real-time monitoring gas flow rate according to claim 1, is characterized in that: described inlet rectifying device (2) and outlet rectifying device (7) are supported by central rectifying plate (17) and rectifying plate support pipe (16), rectifier plates (17) are installed at different heights inside the rectifier plate support tube (16), both ends of the rectifier plate (17) are fixed by the grooves on the inner wall of the rectifier plate support tube (16), and two upper and lower A rectifying channel for fluid to pass through is formed between the rectifying plates (17). 6.根据权利要求5所述的一种实时监测气体流量的阀门，其特征在于：所述整流板(17)截面呈矩形，整流板支撑管(16)内部的各整流板(17)相互平行。6. A valve for real-time monitoring of gas flow according to claim 5, wherein the cross section of the rectifying plate (17) is rectangular, and the rectifying plates (17) inside the rectifying plate support pipe (16) are parallel to each other . 7.根据权利要求1所述的一种实时监测气体流量的阀门，其特征在于：所述阀门进口(1)管路侧壁安装的温度传感器(15)和压力传感器(14)位于进口整流装置(2)的上游，所述阀门出口(8)管路侧壁安装的压力传感器(9)位于出口整流装置(7)的下游。7. a kind of valve of real-time monitoring gas flow rate according to claim 1 is characterized in that: the temperature sensor (15) and the pressure sensor (14) installed on the side wall of the pipeline of the valve inlet (1) are located in the inlet rectifying device Upstream of (2), the pressure sensor (9) installed on the side wall of the valve outlet (8) pipeline is located downstream of the outlet rectifying device (7).
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CN112683206B (en) * 2020-12-24 2022-05-13 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
CN113154122A (en) * 2021-01-22 2021-07-23 上海恩信仪表有限公司 Take governing valve of flow measurement function
CN113252338A (en) * 2021-06-08 2021-08-13 浙江大学 Detection device and estimation method for aerodynamic noise outside valve
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