CN203561474U - Pressure measurement apparatus and pressure measurement assembly - Google Patents
Pressure measurement apparatus and pressure measurement assembly Download PDFInfo
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- CN203561474U CN203561474U CN201320727703.5U CN201320727703U CN203561474U CN 203561474 U CN203561474 U CN 203561474U CN 201320727703 U CN201320727703 U CN 201320727703U CN 203561474 U CN203561474 U CN 203561474U
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Abstract
The utility model relates to a pressure measurement apparatus, which comprises a pressure lead-in tube, a liquid column height measurer, a gas lead-in tube, and a pressure sensor. One end of the pressure lead-in tube extends into a to-be-tested space to define a pressure lead-in point, and the other end of the pressure lead-in tube is closed and positioned outside the to-be-tested space. The to-be-tested space is used for accommodating the liquid. The liquid column height measurer is used for measuring the height of a liquid column between the pressure lead-in point and the liquid level in the pressure lead-in tube. The gas lead-in tube is used for leading the gas into the other end of the pressure lead-in tube. The pressure sensor is used for measuring the gas pressure in the pressure lead-in tube. The utility model also relates to a pressure measurement system, which comprises a plurality of the above pressure measurement apparatuses. The pressure lead-in points of two pressure measurement apparatuses out of the above plurality of pressure measurement apparatuses are respectively positioned on the surface of the inner wall of the pressure lead-in tube and the tube center of the pressure lead-in tube. According to the technical scheme of the utility model, the pressure conduction is carried out by means of gas. On the premise that a liquid under pressure test does not react with the gas, the problems that a conductive medium is high-temperature resistant while not chemically reacting with the liquid under pressure test can be solved.
Description
Technical field
The utility model relates to pressure survey, especially relates to the pressure survey in high-temperature molten salt loop.
Background technology
Fusedsalt reactor (MSR) is as one of six kinds of heap types of Generation IV, and its cooling medium or even fuel itself is all fused salt mixture.In many design proposals, what praise highly the most is that nuclear fuel is dissolved in the villiaumite cooling medium of melting.The working pressure of villiaumite is lower, general a little higher than 1 atmospheric pressure, and working temperature is up to 800 ℃, but its fusing point is 450 ℃ of left and right, and high temperature villiaumite has very strong corrosivity, for pipeline pressure measurement brings very large difficulty.
Existing pressure transducer generally adopts metallic membrane as sensing element, in high temperature like this, and has very strong corrosivity, sensing element to be corroded and with thermal stress, it cannot normally be worked.Usual pressure sensor requires there is pressure pipe simultaneously, if do not add safeguard procedures, will cause solidifying of fused salt.Even if sensing element can adapt to working environment, only 310 ℃ of the high-temperature resistants of its conductive medium (silicone oil or other oil), cannot complete the pressure survey of high-temperature molten salt.
Aspect the measurement of sodium metal circuit pressure, patent CN102435381A has carried out relevant discussion, and its pressure experience parts still adopt foil gauge, cannot be applicable to high temperature corrosion fused salt environment.
Patent CN101750181A has carried out the discussion about high-temperature molten salt pressure measuring, but its serviceability temperature is higher than 450 ℃, and due to corrosion and thermal stress, diaphragm membrane structure should not be used under villiaumite environment.
Utility model content
For solving the problem of pressure experience thermal stress of components and corrosion, realize for example pressure survey in high temperature corrosion fused salt loop, the utility model is proposed.
The utility model provides a kind of device for pressure measurement, comprising: pressure guiding pipe, and one end of pressure guiding pipe extends in space to be measured and limits impulse point, the other end sealing of pressure guiding pipe and being positioned at outside space to be measured, space content to be measured is received liquid; Liquid-column height measuring appliance, the liquid-column height of the liquid level in being configured to measure in pressure guiding pipe from impulse point to pressure guiding pipe; Gas inlet tube, is configured to gas to be incorporated in the other end of pressure guiding pipe; And pressure transducer, be configured to measure the gaseous tension in pressure guiding pipe.
Alternatively, the lower end of pressure guiding pipe extends in space to be measured and limits impulse point, the upper end closed of pressure guiding pipe and being positioned at outside space to be measured; Gas inlet tube is configured to gas to be incorporated into the liquid level top in described pressure guiding pipe.
Alternatively, the upper end of pressure guiding pipe extends in space to be measured and limits impulse point, the lower end closed of pressure guiding pipe and being positioned at outside space to be measured; Gas inlet tube is configured to gas to be incorporated into the liquid level below in described pressure guiding pipe.
Alternatively, described space to be measured is the fused salt loop of using in fusedsalt reactor.Further, described gas inlet tube communicates with source of the gas, and the gaseous tension being incorporated in pressure guiding pipe can regulate.
Alternatively, described pressure guiding pipe has enlarged-diameter portion, and described liquid level is positioned at described enlarged-diameter portion place.
Alternatively, described device for pressure measurement also comprises heat-insulation layer, around the pressure guiding pipe setting that is positioned at outside, space to be measured.
In above-mentioned device for pressure measurement, alternatively, described liquid-column height measuring appliance comprises multipair smooth transmitting terminal and the optical receiving end along liquid-column height direction, arranged successively, level is relative each other along the radial direction of pressure guiding pipe for the light transmitting terminal of each centering and optical receiving end, and the light that each centering is sent from light transmitting terminal is received by optical receiving end.Further, each light transmitting terminal and each optical receiving end include optical fiber and the sleeve pipe that is arranged on outer fiber; On the tube wall of pressure guiding pipe, be provided with the multiple through holes corresponding with light transmitting terminal and optical receiving end, sleeve pipe is arranged in corresponding through hole; And weld with the tube wall of pressure guiding pipe near the radial outer end of the through hole that each sleeve pipe is installed at it.Or alternatively, described liquid-column height measuring appliance comprises transmitting terminal and the receiving end on the inwall of end wall of the described other end that is arranged on described pressure guiding pipe, light or ultrasound wave, are reflected and are entered described optical receiving end by described liquid level towards described liquid level outgoing from described transmitting terminal.
Alternatively, above-mentioned device for pressure measurement also comprises: directintermination joint, be arranged in the mounting hole on the wall in space to be measured, and described one end of described pressure guiding pipe enters in described space to be measured through described directintermination joint.Further, described pressure guiding pipe is suitable for changing the degree of depth extending in described space to be measured.
The utility model also proposes a kind of pressure-measuring system, comprises multiple above-mentioned device for pressure measurement, and wherein the impulse point of two device for pressure measurement in multiple device for pressure measurement lays respectively at the inner wall surface place of pressure guiding pipe and the pipeline center of pressure guiding pipe.
In the technical solution of the utility model, owing to having used gas to carry out pressure conduction, gas does not react with pressure testing liquid in the situation that, solved conductive medium high temperature resistant and not with the problem of pressure testing liquid generation chemical reaction.
Accompanying drawing explanation
Fig. 1 is according to the structural representation of the device for pressure measurement of an exemplary embodiment of the present utility model;
Fig. 2 is the local enlarged diagram according to the device for pressure measurement of an exemplary embodiment of the present utility model.
Embodiment
Describe the embodiment of exemplary of the present utility model below in detail, the example of embodiment is shown in the drawings, and wherein same or analogous label represents same or analogous element.The embodiment describing below with reference to accompanying drawing is exemplary, is intended to explain the utility model, and can not be interpreted as restriction of the present utility model.
As shown in Figure 1-2, the utility model provides a kind of device for pressure measurement, comprising:
Pressure guiding pipe 1, one end of pressure guiding pipe 1 extends in space to be measured and limits impulse point A, the other end sealing of pressure guiding pipe and be positioned at outside space S to be measured the interior receiving fluids of space S to be measured;
Liquid-column height measuring appliance (corresponding to mention below 204 and 205), the liquid-column height of the liquid level in being configured to measure in pressure guiding pipe 1 from impulse point A to pressure guiding pipe;
Pressure transducer 3, is configured to measure the gaseous tension in pressure guiding pipe.
Alternatively, as shown in Figure 1, the lower end of pressure guiding pipe 1 extends to and limits impulse point A in space S to be measured, the upper end closed of pressure guiding pipe 1 and being positioned at outside space S to be measured; Gas inlet tube 2 is configured to gas to be incorporated into the liquid level top in described pressure guiding pipe.
Need to indicate, the liquid-column height of mentioning in the utility model is the significant height of fluid column in short transverse, in short transverse, and the distance between impulse point and liquid level.Therefore, in Fig. 1-2, pressure guiding pipe 1 can be in tilted layout, and also can vertically arrange.
Although do not illustrate, alternatively, the upper end of pressure guiding pipe extends in space to be measured and limits impulse point, the lower end closed of pressure guiding pipe and being positioned at outside space to be measured; Gas inlet tube is configured to gas to be incorporated into the liquid level below in described pressure guiding pipe.
Alternatively, described space to be measured is the fused salt loop of using in fusedsalt reactor, and described liquid is fused salt; Described gas not with described fused salt generation chemical reaction.Further, described gas comprises the one in nitrogen, helium, carbon dioxide.Further, described gas inlet tube communicates with source of the gas, and the gaseous tension being incorporated in pressure guiding pipe can regulate.For example, the scope that can measure higher than liquid-column height measuring appliance when liquid level, during as the light transmitting terminal of the highest point higher than in Fig. 2 and optical receiving end or lower than the light transmitting terminal of the lowest part in Fig. 2 and optical receiving end, can change the pressure of introducing gas, with the height of regulating liquid surface, arrive in suitable scope.
In above-mentioned device for pressure measurement, alternatively, as shown in Figure 2, described liquid-column height measuring appliance comprises multipair smooth transmitting terminal 204 and the optical receiving end 205 along liquid-column height direction, arranged successively, level is relative each other along the radial direction of pressure guiding pipe for the light transmitting terminal of each centering and optical receiving end, and the light that each centering is sent from light transmitting terminal is received by optical receiving end.Further, each light transmitting terminal and each optical receiving end include optical fiber and the sleeve pipe that is arranged on outer fiber; On the tube wall of pressure guiding pipe, be provided with the multiple through holes corresponding with light transmitting terminal and optical receiving end, sleeve pipe is arranged in corresponding through hole; And weld with the tube wall of pressure guiding pipe near the radial outer end of the through hole that each sleeve pipe is installed at it.Or alternatively, described liquid-column height measuring appliance comprises transmitting terminal and the receiving end on the inwall of end wall of the described other end that is arranged on described pressure guiding pipe, light or ultrasound wave, are reflected and are entered described optical receiving end by described liquid level towards described liquid level outgoing from described transmitting terminal.
Make full use of the characteristic that fused salt easily solidifies, solve the sealing between optical fiber and stainless steel sleeve pipe.Each single data optical fiber of laser generation and receiving end all overlaps and has stainless steel sleeve pipe, sleeve pipe is connected in the mode of welding with the outside wall surface of expansion chamber, fused salt can exosmose by the gap between optical fiber and sleeve pipe, once outside the heat-insulation layer through band heating, because environment temperature is solidified compared with the low fused salt that occurs, played self-packing effect.
Alternatively, as shown in Figure 1, above-mentioned device for pressure measurement also comprises: directintermination joint 5, be arranged in the mounting hole on the wall in space to be measured, and described one end of described pressure guiding pipe 1 enters in described space S to be measured through described directintermination joint 5.Further, described pressure guiding pipe 1 is suitable for changing the degree of depth extending in described space to be measured.So, can obtain pressure distribution radially, for velocity analysis and flow rate calculation provide reference.As pressure guiding pipe is set is close to inner-walls of duct face and is arranged in pipeline center, by the pressure of measuring, surveying can pipeline center's fused salt flow velocity, in conjunction with associated temperature measurement, physical property inquiry and fluid mechanics correlation theory, can obtain and measure fused salt velocity flow profile on cross section, finally by flow velocity, the integration on xsect can obtain flow rate of molten salt.
The utility model also proposes a kind of pressure-measuring system, comprises multiple above-mentioned device for pressure measurement, and wherein the impulse point of two device for pressure measurement in multiple device for pressure measurement lays respectively at the inner wall surface place of pressure guiding pipe and the pipeline center of pressure guiding pipe.So, can obtain pressure distribution radially, for velocity analysis and flow rate calculation provide reference.
The fused salt loop of using in fusedsalt reactor take space to be measured below, described liquid illustrate with reference to Fig. 1,2 as the concrete example of fused salt.
If fiber optic liquid height meter (corresponding to multipair smooth transmitting terminal 204 and optical receiving end 205) is topmost L apart from impulse point A distance, getting impulse point is liquid level 0 point, by fiber optic liquid height meter, can measure the height H of pressure guiding pipe fused salt upper surface apart from impulse point.The registration of pressure guiding pipe upper gas pressure transducer 3 is Pa, and fused salt pressure in measured point can be expressed as P=P
a+ ρ gH, the density that wherein ρ is fused salt, g is acceleration of gravity.Once liquid level shows, reach L, will suitably increase the pressure of pressure guiding pipe 1 headroom, top, guarantee the accuracy of fused salt level gauging.According to hydromechanical static equation, can obtain measured point fused salt pressure.By fiber optic liquid height meter, carry out the measurement of pressure guiding pipe fused salt liquid level, then according to hydromechanical static equation, obtain measured point fused salt pressure, due to Fibre Optical Sensor fast response time, can realize the seizure of Pressure Fluctuation Signal.
In the concrete example of the device for pressure measurement shown in Fig. 1-2, device for pressure measurement comprises: pressure guiding pipe 1, directintermination joint 5, the heat-insulation layer 4 of band heating, data, control line lead wire outlet 6, thermal insulation ceramics ring 7 (prevents that lead-in wire is by superheated, but in lead wire outlet 6, the tube wall of the contiguous pipeline 8 that forms space S to be measured does not arrange, thermal insulation ceramics ring can be set), table valve 9, pressure transducer 3, vent valve 10, nitrogen cylinder 11, nitrogen reduction valve 12, stop valve 13, directintermination joint 5 is welded on pipeline 8, pressure guiding pipe 1 is realized and is connected and seals by cutting ferrule and snap ring with directintermination joint 5, the heat-insulation layer 4 of band heating has guaranteed that in pressure guiding pipe, fused salt does not solidify.
Because the pressure of measured point fused salt is higher than pressure guiding pipe 1 top atmospheric pressure, fused salt will be gushed out by pressure guiding pipe 1, compression upper gas, finally by gas as conductive medium by pressure signal transmission to pressure transducer 3.In order to record impulse point fused salt pressure, must know the liquid level of pressure guiding pipe 1 interior fused salt, designed the pressure guiding pipe that can measure as shown in Figure 2 liquid level, it is mainly by lower linking tube 201, upper directintermination joint 202, expansion chamber 203, Laser emission end 204, laser pick-off end 205, lower directintermination joint 206, upper connecting tube 207.Lower linking tube 201 is connected with directintermination joint 5, and fused salt will pour in expansion chamber 203, and expansion chamber sectional area is large compared with lower linking tube 201, avoids capillary action on the impact of measuring.From left side, there is laser in Laser emission end 204, it at fused salt liquid level, is the position arriving, laser pick-off end 205 will receive light signal, by follow up device, be converted into high level, once transmitting terminal is flooded by fused salt, receiving end cannot obtain light signal, shows low level, by every a pair of end that transmits and receives is positioned and numbered, by numbering corresponding low and high level, analyze the liquid level of fused salt in current pressure guiding pipe.
Before use, the rational position of first nitrogen reduction valve 12 being adjusted, opens stop valve 13, by protective gas (N
2) by the Bas Discharged in loop.Open table valve 9, start pump for liquid salts and fill salt to loop, now by the reading of pressure transducer 3, carry out operations platoon's air valve 10, by exhaust, pressure guiding pipe top air pressure is adjusted 1 standard atmospheric pressure left and right.
When carrying out the higher loop of pressure molten salt pressure measuring, during working pressure as described in patent CN101750181A, by nitrogen cylinder 11 and reduction valve 12, coordinating the process of boosting in fused salt loop to set up the air pressure on pressure guiding pipe 2 tops.
Utilize the technical solution of the utility model, can at least be achieved as follows one of technique effect:
Adopting while not carrying out pressure conduction with the gas of molten salt react ion, can meet conductive medium high temperature resistant and not with the requirement of high-temperature molten salt generation chemical reaction, make pressure transducer there is good working environment;
By optical fiber, carry out the measurement of fused salt liquid level, fast response time, measuring accuracy is high;
By adjusting, be incorporated into the pressure of the gas in pressure guiding pipe, the scope of this measurement mechanism application is greatly expanded;
By directintermination joint is set on wall and pressure guiding pipe, can arbitrarily change pressure guiding pipe and insert the degree of depth of pipeline, obtain pressure distribution radially, for velocity analysis and flow rate calculation provide reference;
By utilizing fused salt to meet the characteristic of cold self-solidifying, can solve the problem sealing between optical fiber and sleeve pipe.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can change these embodiment.The scope of application of the present utility model is limited by claims and equivalent thereof.
Claims (13)
1. a device for pressure measurement, is characterized in that, comprising:
Pressure guiding pipe, one end of pressure guiding pipe extends in space to be measured and limits impulse point, the other end sealing of pressure guiding pipe and being positioned at outside space to be measured, space content to be measured is received liquid;
Liquid-column height measuring appliance, the liquid-column height of the liquid level in being configured to measure in pressure guiding pipe from impulse point to pressure guiding pipe;
Gas inlet tube, is configured to gas to be incorporated in the other end of pressure guiding pipe; And
Pressure transducer, is configured to measure the gaseous tension in pressure guiding pipe.
2. device for pressure measurement according to claim 1, is characterized in that:
The lower end of pressure guiding pipe extends in space to be measured and limits impulse point, the upper end closed of pressure guiding pipe and being positioned at outside space to be measured;
Gas inlet tube is configured to gas to be incorporated into the liquid level top in described pressure guiding pipe.
3. device for pressure measurement according to claim 1, is characterized in that:
The upper end of pressure guiding pipe extends in space to be measured and limits impulse point, the lower end closed of pressure guiding pipe and being positioned at outside space to be measured;
Gas inlet tube is configured to gas to be incorporated into the liquid level below in described pressure guiding pipe.
4. device for pressure measurement according to claim 1, is characterized in that:
Described space to be measured is the fused salt loop of using in fusedsalt reactor.
5. device for pressure measurement according to claim 4, is characterized in that:
Described gas inlet tube communicates with source of the gas, and the gaseous tension being incorporated in pressure guiding pipe can regulate.
6. device for pressure measurement according to claim 1, is characterized in that:
Described pressure guiding pipe has enlarged-diameter portion, and described liquid level is positioned at described enlarged-diameter portion place.
7. device for pressure measurement according to claim 1, is characterized in that, also comprises:
Heat-insulation layer, around the pressure guiding pipe setting that is positioned at outside, space to be measured.
8. according to the device for pressure measurement described in any one in claim 1-7, it is characterized in that:
Described liquid-column height measuring appliance comprises multipair smooth transmitting terminal and the optical receiving end along liquid-column height direction, arranged successively, level is relative each other along the radial direction of pressure guiding pipe for the light transmitting terminal of each centering and optical receiving end, and the light that each centering is sent from light transmitting terminal is received by optical receiving end.
9. device for pressure measurement according to claim 8, is characterized in that:
Each light transmitting terminal and each optical receiving end include optical fiber and are arranged on the sleeve pipe of outer fiber;
On the tube wall of pressure guiding pipe, be provided with the multiple through holes corresponding with light transmitting terminal and optical receiving end, sleeve pipe is arranged in corresponding through hole; And
Near the radial outer end of the through hole that each sleeve pipe is installed at it, weld with the tube wall of pressure guiding pipe.
10. device for pressure measurement according to claim 8, is characterized in that:
Described liquid-column height measuring appliance comprises transmitting terminal and the receiving end on the inwall of end wall of the described other end that is arranged on described pressure guiding pipe, and light or ultrasound wave, are reflected and entered described optical receiving end by described liquid level towards described liquid level outgoing from described transmitting terminal.
11. according to the device for pressure measurement described in any one in claim 1-7, it is characterized in that, also comprises:
Directintermination joint, is arranged in the mounting hole on the wall in space to be measured, and described one end of described pressure guiding pipe enters in described space to be measured through described directintermination joint.
12. device for pressure measurement according to claim 11, is characterized in that:
Described pressure guiding pipe is suitable for changing the degree of depth extending in described space to be measured.
13. 1 kinds of pressure-measuring systems, it is characterized in that, comprise multiplely according to the device for pressure measurement described in any one in claim 1-12, wherein the impulse point of two device for pressure measurement in multiple device for pressure measurement lays respectively at the inner wall surface place of pressure guiding pipe and the pipeline center of pressure guiding pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320727703.5U CN203561474U (en) | 2013-11-18 | 2013-11-18 | Pressure measurement apparatus and pressure measurement assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320727703.5U CN203561474U (en) | 2013-11-18 | 2013-11-18 | Pressure measurement apparatus and pressure measurement assembly |
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| CN203561474U true CN203561474U (en) | 2014-04-23 |
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| CN201320727703.5U Withdrawn - After Issue CN203561474U (en) | 2013-11-18 | 2013-11-18 | Pressure measurement apparatus and pressure measurement assembly |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089739A (en) * | 2014-06-22 | 2014-10-08 | 中国北方发动机研究所(天津) | High-temperature liquid pressure correcting and measuring device |
| CN105203248A (en) * | 2015-09-07 | 2015-12-30 | 苏州莱测检测科技有限公司 | Steam pipeline pressure measuring device |
| CN105333989A (en) * | 2014-06-12 | 2016-02-17 | 国家核电技术有限公司 | Pressure guiding device for measuring micro differential pressure of liquid medium in pipeline |
| CN105865701A (en) * | 2016-03-24 | 2016-08-17 | 中国科学院上海应用物理研究所 | High-temperature villiaumite pressure meter |
| CN104655349B (en) * | 2013-11-18 | 2017-07-18 | 国家电投集团科学技术研究院有限公司 | Device for pressure measurement and pressure measurement method |
| CN107359304A (en) * | 2016-05-10 | 2017-11-17 | 宁德时代新能源科技股份有限公司 | Lithium ion battery liquid injection hole sealing structure |
| CN107705863A (en) * | 2017-10-16 | 2018-02-16 | 中国核动力研究设计院 | A kind of high temperature and pressure experiment body impulse seal and installation method |
| CN113757564A (en) * | 2021-08-12 | 2021-12-07 | 中国船舶重工集团公司第七一九研究所 | Hydraulic pressure measuring device |
-
2013
- 2013-11-18 CN CN201320727703.5U patent/CN203561474U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655349B (en) * | 2013-11-18 | 2017-07-18 | 国家电投集团科学技术研究院有限公司 | Device for pressure measurement and pressure measurement method |
| CN105333989A (en) * | 2014-06-12 | 2016-02-17 | 国家核电技术有限公司 | Pressure guiding device for measuring micro differential pressure of liquid medium in pipeline |
| CN105333989B (en) * | 2014-06-12 | 2018-05-25 | 国家核电技术有限公司 | For measuring the pressure-inducting device of the differential pressure of liquid medium in pipeline |
| CN104089739A (en) * | 2014-06-22 | 2014-10-08 | 中国北方发动机研究所(天津) | High-temperature liquid pressure correcting and measuring device |
| CN105203248A (en) * | 2015-09-07 | 2015-12-30 | 苏州莱测检测科技有限公司 | Steam pipeline pressure measuring device |
| CN105865701A (en) * | 2016-03-24 | 2016-08-17 | 中国科学院上海应用物理研究所 | High-temperature villiaumite pressure meter |
| CN105865701B (en) * | 2016-03-24 | 2018-11-27 | 中国科学院上海应用物理研究所 | A kind of high temperature villiaumite pressure gauge |
| CN107359304A (en) * | 2016-05-10 | 2017-11-17 | 宁德时代新能源科技股份有限公司 | Lithium ion battery liquid injection hole sealing structure |
| CN107705863A (en) * | 2017-10-16 | 2018-02-16 | 中国核动力研究设计院 | A kind of high temperature and pressure experiment body impulse seal and installation method |
| CN107705863B (en) * | 2017-10-16 | 2018-12-18 | 中国核动力研究设计院 | A kind of high temperature and pressure experiment ontology impulse seal and installation method |
| CN113757564A (en) * | 2021-08-12 | 2021-12-07 | 中国船舶重工集团公司第七一九研究所 | Hydraulic pressure measuring device |
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Address after: 102209 Changping District City, Beiqijia, the future of science and technology in the south area of the town of Beijing Patentee after: State Power Investment Group Science and Technology Research Institute Co Ltd Address before: 102209 Beijing, Changping District, Beiqijia on the north side of the road on the east side of the stability of commercial building, room C, room 4, Room 401 Patentee before: China Nuclear (Beijing) science and Technology Research Institute Co., Ltd. |
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Granted publication date: 20140423 Effective date of abandoning: 20170718 |
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| AV01 | Patent right actively abandoned |