CN113670394A - Metering management and control device for wide-range self-adjusting instrument parameters - Google Patents
Metering management and control device for wide-range self-adjusting instrument parameters Download PDFInfo
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- CN113670394A CN113670394A CN202110924425.1A CN202110924425A CN113670394A CN 113670394 A CN113670394 A CN 113670394A CN 202110924425 A CN202110924425 A CN 202110924425A CN 113670394 A CN113670394 A CN 113670394A
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- metering
- pipeline
- metering device
- electric valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/001—Means for regulating or setting the meter for a predetermined quantity
- G01F15/003—Means for regulating or setting the meter for a predetermined quantity using electromagnetic, electric or electronic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/005—Valves
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Fluid Pressure (AREA)
- Flow Control (AREA)
Abstract
The invention relates to a metering control device for wide-range self-adjusting instrument parameters, wherein the diameter of a pipeline is D; the automatic liquid discharge device comprises an electric valve, a metering device with adjustable measuring range, a front end metering device, a pressure stabilizing device, an automatic liquid discharge device and a controller, wherein the electric valve is arranged on a pipeline; the controller is respectively connected with the electric valve, the metering device and the front end metering device through signals. The metering device is a differential pressure transmitter; the front end metering device is a vortex shedding flowmeter; the automatic liquid drainage device comprises a valve body, a guide pillar, a floater, a sealing ring and a spring; the guide pillar is provided with a water outlet hole. The invention has the beneficial effects that: through controller, differential pressure transmitter, electric valve and the vortex flowmeter who sets up, the signal of vortex flowmeter is received to the controller, adjusts the big, little of the angle that electric valve opened, and the controller sends the range adjustment signal for differential pressure transmitter, and the range adjustment with differential pressure transmitter is 2 times of the flow that vortex flowmeter surveyed for differential pressure transmitter measures more accurately.
Description
Technical Field
The invention relates to the field of instruments, in particular to a metering control device for wide-range self-adjusting instrument parameters.
Background
At present, industrial steam heat users generally have the phenomenon that the steam supply amount is greatly different at the initial stage of heat utilization and after the development of years, and the main solutions of the current project are three.
The first is that a small-diameter pipeline is adopted in the initial stage of heat supply and is matched with a small-range flow metering instrument, and after the scale of a later-stage heat user is expanded, the pipeline is reformed into a large-diameter pipeline and a large-range flow metering instrument. The disadvantages are as follows: repeated construction has high construction cost, and heat users cannot normally obtain heat supply in the construction process to maintain self production.
The second is to install the air supply pipeline of two kinds of bores of size simultaneously, equip two sets of flow instrument, the pipeline that the heat consumer produced the in-process and switched to use the corresponding flow is opened and close by oneself. The disadvantages are as follows: the project cost is higher, and the occupied space is large.
The third is that a large-diameter pipeline is directly installed to be matched with a wide-range-ratio flow metering instrument, and heat consumption of a heat user is measured in a lower range of a wide range in the initial stage (for example, the maximum speed per hour of an automobile is 120, the automobile always runs around 20, five grids can be arranged on a dial plate in an interval of 100-120, and only one grid can be arranged between 18-20). The disadvantages are as follows: the heat supply is always used in a low area with a wide range in the earlier stage, the accuracy can be guaranteed, but the data precision is low, and the fine regulation and control management of the whole pipe network is not convenient.
Therefore, how to design a metering control device for wide-range self-adjusting instrument parameters solves the problem that the thermal metering instrument is inaccurate in flow measurement, and becomes the current task.
Disclosure of Invention
The invention aims to solve the technical problem of providing a metering control device for wide-range self-adjusting instrument parameters, which can solve the problem that a thermal metering instrument cannot accurately measure the flow.
In order to solve the problems, the invention adopts the following technical scheme:
a metering management and control device of wide-range self-adjusting instrument parameters is used for pipeline metering of industrial steam heat users, and the diameter of a pipeline is D; the device comprises an electric valve arranged on a pipeline, a metering device with adjustable measuring range arranged on the pipeline behind the electric valve, a front end metering device arranged on the pipeline in front of the electric valve and a controller; the controller is respectively connected with the electric valve, the metering device and the front end metering device through signals.
Further, the metering device is a differential pressure transmitter; the front end metering device is a vortex shedding flowmeter; the distance between the differential pressure transmitter and the straight pipe section of the electric valve is not less than 6D, and the distance between the vortex shedding flowmeter and the straight pipe section of the electric valve is not less than 6D.
Further, the automatic liquid drainage device is arranged on a pipeline in front of the front end metering device; the distance between the automatic liquid drainage device and the straight pipe section of the front end metering device is not less than 6D.
Further, the automatic liquid drainage device comprises a valve body communicated with a pipeline, a guide pillar arranged in the valve body and a floater fixedly connected with the guide pillar; a guide sleeve is arranged in the valve body, a water outlet hole is formed in the side wall of the guide pillar, a sealing ring is arranged between the guide sleeve and the guide pillar, and the guide pillar is connected with the guide sleeve in a sliding mode; a spring is arranged between the floater and the guide sleeve; the spring is sleeved on the guide post; the guide post and the floater are made of light plastics; the spring material is stainless steel.
Further, a pressure stabilizing device is arranged on a pipeline behind the metering device, and the distance between the pressure stabilizing device and the straight pipe section of the metering device is not less than 6D; .
Further, the pressure stabilizing device is of an inverted U-shaped structure; the highest point of the inverted U-shaped structure is at least twice the diameter of the measured pipeline as the highest point of the metering device; the pressure stabilizer is made of a steel pipe with the same diameter as the measured pipeline
The invention has the beneficial effects that:
1. by the aid of the pressure stabilizing device, measurement errors caused by unstable flow in the pipeline are avoided;
2. through the arranged automatic liquid drainage device; the condition that the measurement is inaccurate due to the liquid in the detected pipeline can be solved;
3. the float and the guide post are made of light plastics, the guide post moves upwards along the guide sleeve through the buoyancy of the float, so that liquid is discharged through the water outlet hole, and if the float and the guide post are made of heavy materials, the buoyancy cannot overcome the gravity and the elasticity of the spring, so that the water outlet hole cannot be opened, and liquid cannot be discharged; the spring is made of stainless steel, so that the phenomenon that steam in the pipeline corrodes the spring and loses elasticity is avoided; through the sealing washer that sets up, guarantee not have the clearance between guide pillar and the guide pin bushing, avoid steam loss.
4. The controller receives signals of the vortex flowmeter and preliminarily judges the steam flow in the pipeline through the arranged controller, the differential pressure transmitter, the electric valve and the vortex flowmeter, the controller firstly sends out an adjusting signal to the electric valve, if the flow is large, the opening angle of the electric valve is increased, and if the flow is small, the opening angle of the electric valve is decreased; the controller sends a range adjusting signal to the differential pressure transmitter again, and the range of the differential pressure transmitter is adjusted to be 2 times of the flow measured by the vortex flowmeter, so that the differential pressure transmitter is more accurate;
5. through straight tube section distance is not less than 6D around differential pressure transmitter, straight tube section distance is not less than 6D's design around the vortex shedding flowmeter, avoids differential pressure transmitter and the vortex shedding flowmeter influences flow measurement's stability because pipeline reducing or installation other parts.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an automatic drain device;
fig. 3 is an enlarged view of fig. 2 at C.
The reference numbers in the figures illustrate:
1-electric valve, 2-metering device, 3-pressure stabilizing device, 4-front end metering device, 5-automatic liquid discharging device, 50-valve body, 51-floater, 52-spring, 53-sealing ring, 54-water outlet hole and 55-guide post.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any creative effort; all fall within the scope of protection of the present invention.
As shown in fig. 1-3:
the metering control device for the wide-range self-adjusting instrument parameters is optimized and improved by aiming at the solution of the differentiated current situation of the air consumption before and after the hot user. A wide-range flow metering device is adopted on a project site, an electric regulating valve is arranged at the front end (outside the length required by a straight pipe section) of the flow metering device of a pipeline, and the flow can be regulated according to actual requirements. And a secondary meter head or a differential pressure transmitter matched with the throttling device is acquired by front-end equipment through a 4-20mA signal. The front-end equipment adjusts the upper limit of the measuring range of the transmitter through the HART communication protocol according to the actual gas consumption, so that the upper limit of the measuring range is smaller in small flow and correspondingly increased in large flow, and finally the purpose of conveniently and finely regulating and controlling the highest flow collected under the same working condition is achieved.
A metering management and control device of wide-range self-adjusting instrument parameters is used for pipeline metering of industrial steam heat users, and the diameter of a pipeline is D; the device comprises an electric valve 1 arranged on a pipeline, a metering device 2 with adjustable measuring range arranged on the pipeline behind the electric valve 1, a front end metering device 4 arranged on the pipeline in front of the electric valve 1 and a controller; the controller is respectively connected with the electric valve 1, the metering device 2 and the front end metering device 4 through signals. The controller is internally provided with a communication module, the controller performs data transmission with the control center through the communication module, and signals of the metering device 2 collected by the controller are transmitted to the control center for storage.
The metering device 2 is a differential pressure transmitter; the front end metering device 4 is a vortex shedding flowmeter; the distance between the differential pressure transmitter and the electric valve 1 is a 2; the length of the a2 is not less than 6D, the distance between the vortex shedding flowmeter and the electric valve 1 is a3, and the length of the a3 is not less than 6D.
The automatic liquid drainage device 5 is arranged on a pipeline in front of the front end metering device 4; the distance between the automatic liquid discharging device 5 and the front end metering device 4 is a4, and the length of the a4 is not less than 6D.
When the metering instrument is used for measurement, the measured data is most accurate when the measured data is in the middle position of the maximum measuring range; according to the principle, the controller receives signals of the vortex flowmeter, preliminarily judges the steam flow in the pipeline, firstly sends an adjusting signal to the electric valve 1 through the controller, the differential pressure transmitter, the electric valve 1 and the vortex flowmeter are arranged, if the flow is large, the opening angle of the electric valve 1 is increased, and if the flow is small, the opening angle of the electric valve 1 is decreased; the controller sends a range adjusting signal to the differential pressure transmitter again, and the range of the differential pressure transmitter is adjusted to be 2 times of the flow measured by the vortex flowmeter, so that the differential pressure transmitter is more accurate;
the differential pressure transmitter adopts a model of a river EJA110E-DMS5J-912 DA; the cross river differential pressure transmitter EJA110E-JMS5J-912DA/NS21 adopts a monocrystalline silicon resonant sensor technology and is suitable for measuring the flow, liquid level, density and pressure of liquid, gas or steam. EJA110E converts the measured differential pressure into a 4-20mA DC current signal for output, can measure, display or remotely monitor the static pressure, and has the functions of quick response, remote setting, self diagnosis and the like.
The automatic liquid discharging device 5 comprises a valve body 50 communicated with a pipeline, a guide post 55 arranged in the valve body 1 and a floater 51 fixedly connected with the guide post 55; a guide sleeve is arranged in the valve body 50, a water outlet hole 54 is formed in the side wall of the guide pillar 55, a sealing ring 53 is arranged between the guide sleeve and the guide pillar 55, and the guide pillar 55 is connected with the guide sleeve in a sliding manner; a spring 52 is arranged between the floater 51 and the guide sleeve; the spring 52 is sleeved on the guide post 55; the guide post 55 and the floater 51 are made of light plastics; the spring 52 is made of stainless steel; the spring 52 is provided to prevent the float 51 from rising indefinitely under the influence of buoyancy, and to allow the float 51 to be quickly reset.
A pressure stabilizing device 3 is further arranged on the pipeline behind the metering device 2, and the distance between the pressure stabilizing device 3 and the metering device 2 is a 1; the a1 is not less than 6D; .
The pressure stabilizing device 3 is of an inverted U-shaped structure; the highest point of the inverted U-shaped structure is at least twice the diameter of the measured pipeline than the highest point of the metering device 2; the pressure stabilizer 3 is made of a steel pipe with the same diameter as the measured pipeline.
The working principle of the invention is that,
the device is well installed, the controller receives signals of the vortex flowmeter, preliminarily judges the steam flow in the pipeline, firstly sends an adjusting signal to the electric valve 1, if the flow is large, the opening angle of the electric valve 1 is increased, and if the flow is small, the opening angle of the electric valve 1 is decreased; the controller sends a range adjusting signal to the differential pressure transmitter again, and the maximum range of the differential pressure transmitter is adjusted to be 2 times of the flow measured by the vortex flowmeter, so that the differential pressure transmitter uses the middle position for measurement;
the principle of the automatic liquid drainage is that when water exists in a pipeline, the water flows into the valve body 50, the water exerts buoyancy on the floater 51, and the floater 51 drives the guide pillar 55 to overcome the pulling force of the spring 52, the gravity of the floater 50 and the guide pillar 55, and the frictional resistance between the guide pillar and the guide sleeve to move upwards; when the position of the water outlet hole 54 of the guide pillar 55 reaches the outer side of the guide sleeve, the water outlet hole 54 starts to discharge water, so that the influence of accumulated water on flow measurement is avoided; the measured flow value is more accurate.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (6)
1. A metering management and control device of wide-range self-adjusting instrument parameters is used for pipeline metering of industrial steam heat users, and the diameter of a pipeline is D; the device is characterized by comprising an electric valve (1) arranged on a pipeline, a metering device (2) with adjustable measuring range arranged on the pipeline behind the electric valve (1), a front end metering device (4) arranged on the pipeline in front of the electric valve (1) and a controller; the controller is respectively in signal connection with the electric valve (1), the metering device (2) and the front end metering device (4).
2. The metering management and control device for the wide-range self-adjusting instrument parameters according to claim 1, characterized in that: the metering device (2) is a differential pressure transmitter; the front end metering device (4) is a vortex shedding flowmeter; the distance between the differential pressure transmitter and the straight pipe section of the electric valve (1) is not less than 6D, and the distance between the vortex shedding flowmeter and the straight pipe section of the electric valve (1) is not less than 6D.
3. The metering management and control device for the wide-range self-adjusting instrument parameters according to claim 1, characterized in that: the automatic liquid drainage device (5) is arranged on a pipeline in front of the front end metering device (4); the distance between the automatic liquid drainage device (5) and the straight pipe section of the front end metering device (4) is not less than 6D.
4. The metering management and control device for the wide-range self-adjusting instrument parameters according to claim 3, characterized in that: the automatic liquid drainage device (5) comprises a valve body (50) communicated with a pipeline, a guide post (55) arranged in the valve body (1), and a floater (51) fixedly connected with the guide post (55); a guide sleeve is arranged in the valve body (50), a water outlet hole (54) is formed in the side wall of the guide pillar (55), a sealing ring (53) is arranged between the guide sleeve and the guide pillar (55), and the guide pillar (55) is connected with the guide sleeve in a sliding mode; a spring (52) is arranged between the floater (51) and the guide sleeve; the spring (52) is sleeved on the guide post (55); the guide post (55) and the floater (51) are made of light plastics; the spring (52) is made of stainless steel.
5. The metering management and control device for the wide-range self-adjusting instrument parameters according to claim 1, characterized in that: and a pressure stabilizing device (3) is further arranged on the pipeline behind the metering device (2), and the distance between the pressure stabilizing device (3) and the straight pipe section between the metering device (2) is not less than 6D.
6. The metering management and control device for the wide-range self-adjusting instrument parameters according to claim 5, characterized in that: the pressure stabilizing device (3) is of an inverted U-shaped structure; the highest point of the inverted U-shaped structure is at least one time higher than the highest point of the metering device (2) by the diameter D of the pipeline; the pressure stabilizer (3) is made of a steel pipe with the same diameter as the measured pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110924425.1A CN113670394B (en) | 2021-08-12 | 2021-08-12 | Metering control device for wide-range self-adjusting instrument parameters |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110924425.1A CN113670394B (en) | 2021-08-12 | 2021-08-12 | Metering control device for wide-range self-adjusting instrument parameters |
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| CN113670394A true CN113670394A (en) | 2021-11-19 |
| CN113670394B CN113670394B (en) | 2023-07-28 |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2147518Y (en) * | 1993-02-19 | 1993-11-24 | 杨彤彬 | Air (vapour)thermodynamic parameter instrument |
| CN1188231A (en) * | 1997-01-15 | 1998-07-22 | 机械工业部上海工业自动化仪表研究所 | Wide-range differential pressure type flowmeter |
| CN101042304A (en) * | 2007-04-24 | 2007-09-26 | 胜利油田胜利工程设计咨询有限责任公司 | Oil gas and water mixed flow phase-splitting contimuous measuring equipment |
| CN101723303A (en) * | 2009-12-15 | 2010-06-09 | 苏州昆拓冷机有限公司 | Portable secondary refrigerant liquid filling box |
| CN101774681A (en) * | 2010-01-27 | 2010-07-14 | 何际跃 | Micro-pore aeration system |
| CN101881640A (en) * | 2010-06-30 | 2010-11-10 | 重庆耐德正奇流量仪表有限公司 | Vortex mass flow meter |
| CN102095460A (en) * | 2010-12-05 | 2011-06-15 | 威海坤科流量仪表有限公司 | Low-velocity wide-range gas mass flowmeter |
| CN102110518A (en) * | 2009-12-29 | 2011-06-29 | 西安华伟光电技术有限公司 | Automatic measurement range switching device of electronic current transformer |
| CN202109938U (en) * | 2011-05-31 | 2012-01-11 | 上海科洋科技发展有限公司 | Wide range flow measuring device |
| CN202382786U (en) * | 2011-11-24 | 2012-08-15 | 宁波水表股份有限公司 | Wide-range household water meter |
| CN203573178U (en) * | 2013-07-31 | 2014-04-30 | 曾胜 | Grouting slurry pressure control device |
| CN205546299U (en) * | 2016-04-22 | 2016-08-31 | 徐秀丽 | Novel embedded adjustable voltage stabilizer |
| CN205748496U (en) * | 2016-07-06 | 2016-11-30 | 江小飞 | A kind of wide-range V-arrangement taper flow meter |
| CN208223796U (en) * | 2018-05-28 | 2018-12-11 | 泉州市沪航阀门制造有限公司 | A kind of valve fluid performance test pipeline |
| CN213685500U (en) * | 2020-10-29 | 2021-07-13 | 四川科宏石油天然气工程有限公司 | Float pilot-operated drain valve |
-
2021
- 2021-08-12 CN CN202110924425.1A patent/CN113670394B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2147518Y (en) * | 1993-02-19 | 1993-11-24 | 杨彤彬 | Air (vapour)thermodynamic parameter instrument |
| CN1188231A (en) * | 1997-01-15 | 1998-07-22 | 机械工业部上海工业自动化仪表研究所 | Wide-range differential pressure type flowmeter |
| CN101042304A (en) * | 2007-04-24 | 2007-09-26 | 胜利油田胜利工程设计咨询有限责任公司 | Oil gas and water mixed flow phase-splitting contimuous measuring equipment |
| CN101723303A (en) * | 2009-12-15 | 2010-06-09 | 苏州昆拓冷机有限公司 | Portable secondary refrigerant liquid filling box |
| CN102110518A (en) * | 2009-12-29 | 2011-06-29 | 西安华伟光电技术有限公司 | Automatic measurement range switching device of electronic current transformer |
| CN101774681A (en) * | 2010-01-27 | 2010-07-14 | 何际跃 | Micro-pore aeration system |
| CN101881640A (en) * | 2010-06-30 | 2010-11-10 | 重庆耐德正奇流量仪表有限公司 | Vortex mass flow meter |
| CN102095460A (en) * | 2010-12-05 | 2011-06-15 | 威海坤科流量仪表有限公司 | Low-velocity wide-range gas mass flowmeter |
| CN202109938U (en) * | 2011-05-31 | 2012-01-11 | 上海科洋科技发展有限公司 | Wide range flow measuring device |
| CN202382786U (en) * | 2011-11-24 | 2012-08-15 | 宁波水表股份有限公司 | Wide-range household water meter |
| CN203573178U (en) * | 2013-07-31 | 2014-04-30 | 曾胜 | Grouting slurry pressure control device |
| CN205546299U (en) * | 2016-04-22 | 2016-08-31 | 徐秀丽 | Novel embedded adjustable voltage stabilizer |
| CN205748496U (en) * | 2016-07-06 | 2016-11-30 | 江小飞 | A kind of wide-range V-arrangement taper flow meter |
| CN208223796U (en) * | 2018-05-28 | 2018-12-11 | 泉州市沪航阀门制造有限公司 | A kind of valve fluid performance test pipeline |
| CN213685500U (en) * | 2020-10-29 | 2021-07-13 | 四川科宏石油天然气工程有限公司 | Float pilot-operated drain valve |
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|---|---|
| CN113670394B (en) | 2023-07-28 |
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Address after: Building 9, Runjiang Headquarters International, No. 455 Yuhua East Road, High-tech Zone, Shijiazhuang City, Hebei Province, 050000 Applicant after: HEBEI GONGDA GREEN ENERGY TECHNOLOGY Corp.,Ltd. Address before: 050000 unit 6, building 9, Runjiang headquarters international, 319 Changjiang Avenue, high tech Zone, Shijiazhuang, Hebei Province Applicant before: HEBEI GONGDA GREEN ENERGY TECHNOLOGY Corp.,Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |