CN110371917B - Automatic filling device and method for fluid loop - Google Patents
Automatic filling device and method for fluid loop Download PDFInfo
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- CN110371917B CN110371917B CN201910482791.9A CN201910482791A CN110371917B CN 110371917 B CN110371917 B CN 110371917B CN 201910482791 A CN201910482791 A CN 201910482791A CN 110371917 B CN110371917 B CN 110371917B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/36—Arrangements of flow- or pressure-control valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/72—Devices for applying air or other gas pressure for forcing liquid to delivery point
- B67D7/725—Devices for applying air or other gas pressure for forcing liquid to delivery point using negative pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
- B67D7/763—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators of air separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
Abstract
The invention discloses an automatic fluid loop filling device and a filling method, wherein a pressure reducing valve and a manual ball valve on an original gas path pipeline of the filling device are replaced by an electric pressure reducing valve and an electromagnetic valve, a manual regulating valve on an original liquid return pipeline of the filling device is replaced by an electric regulating valve, and a flow switch is arranged on a pipeline of a sight glass connected with an overflow groove; other manual ball valves on the pipeline are replaced by electric ball valves. The invention can realize automation, reduce human resources and improve filling precision.
Description
Technical Field
The invention relates to the technical field of spacecraft pipeline systems, in particular to an automatic filling device and a filling method for a fluid loop.
Background
The spacecraft fluid loop needs to carry out the filling work of the liquid working medium, the filling work is a key link in the development process, and the fluid loop automatic filling vehicle is used for carrying out the filling work of the working medium.
The working medium filling work comprises the steps of filling vehicle self-checking, working medium degassing, system vacuumizing, system adding, energy storage device filling, high-temperature quantity discharging, filling quantity calculation and the like, and the process is complex and has no reversibility. Meanwhile, the working medium filling work has high requirement on the control precision of the filling pressure, and the required precision is superior to 0.01 MPa.
Commonly used filling vehicles comprise a vacuum pumping vehicle and a filling tank car, wherein the vacuum pumping vehicle usually consists of a mechanical pump or an oil pump; as shown in fig. 1, the filling tank car generally comprises a liquid storage tank, an overflow tank, a vacuum gauge, a pressure gauge, a pipeline and valves, wherein the pipeline is divided into a gas circuit, a liquid circuit and a vacuum-pumping circuit, and the pipeline relates to nearly 20 pipeline valves, and the valves are divided into ball valves and needle valves.
During filling, each valve is opened and closed according to the flow, and the whole process is expected to carry out more than 150 times of manual opening and closing operations of the valve. Meanwhile, the filling vehicle is compact in size, the pipelines and the valves are arranged in a three-dimensional mode, the pipelines are interwoven, the valves are different in transverse and vertical directions, and the possibility of misoperation is easily caused during manual operation. Due to the irreversibility of the filling process, if misoperation occurs in the intermediate link, all processes need to be restarted, even the working medium is required to be removed seriously, the working time of 5-8 days is additionally brought, and the development progress of the whole spacecraft is greatly influenced.
The filling pressure is controlled and output through the pressure reducing valve, certain hysteresis exists in pressure control, dynamic change can occur in the filling process, and the pressure control precision is poor. When the filling pressure is controlled by rotating a rotary nut of the pressure reducing valve by an operator, the action is slow, and the manual dynamic adjustment is needed in real time according to the reading of the pressure gauge, so that the requirement on the operator is high, and the control precision is poor.
In addition, in the high-temperature discharge link in the filling process, the needle valve needs to be manually operated to perform precise discharge in different times, the discharge precision is +/-2 mm, the requirement on the operation of personnel is high, and the process is irreversible. Meanwhile, after the discharge is finished, the liquid level needs to be read manually, and the filling amount is calculated.
At present, in order to ensure the smooth implementation of filling work, a team mode of 5 persons in total is adopted for commanding 1 person, operating a filling vehicle by 1 person, operating a pressure reducing valve by 1 person, confirming by 1 person and judging by 1 person, the whole filling process lasts for 3-4 days, the efficiency is low, and human resources are greatly wasted.
Therefore, the design of the automatic fluid loop filling device has important significance for improving the automation degree of working medium filling, reducing human resources, improving the filling precision and reducing the misoperation risk.
Disclosure of Invention
In view of this, the invention provides an automatic filling device and a filling method for a fluid loop, which can realize automation, reduce human resources and improve filling accuracy.
The technical scheme adopted by the invention is as follows:
a kind of fluid circuit automatic filling device, replace reducing valve and manual ball valve on the original gas circuit pipeline of filling device with electronic reducing valve and electromagnetic valve, replace the manual control valve on the original liquid circuit pipeline of filling device with electronic control valve, install the flow switch on the pipeline that the sight glass connects the overflow launder; other manual ball valves on the pipeline are replaced by electric ball valves.
Further, the filling system adopts a magnetostrictive liquid level meter.
The automatic filling method for the fluid loop comprises the following steps:
firstly, automatically controlling the closing of an electromagnetic valve on a gas circuit pipeline, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and the upper part of a liquid storage tank and an electric ball valve on a pipeline for connecting the lower part of the liquid storage tank and a filter, and simultaneously automatically controlling the opening of the electric ball valve on a vacuum pumping loop, an electric regulating valve on a liquid return pipeline, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and a vacuum gauge I, an electric ball valve on the vacuum pumping loop and an electric ball valve on a pipeline for connecting a liquid return pipeline and a vacuum gauge III to perform vacuum pumping self-inspection;
step two, after the liquid storage tank is filled with liquid, automatically controlling the closing of an electric ball valve on a pipeline for connecting a liquid return pipeline and a vacuum gauge pipe III, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and a vacuum gauge pipe I and an electric ball valve on a pipeline for connecting the lower part of the liquid storage tank and a filter, and simultaneously automatically controlling the opening of the electric ball valve on a vacuum pumping circuit, an electric regulating valve on the liquid return pipeline and an electric ball valve on a pipeline for connecting the liquid feeding pipeline and the upper part of the liquid storage tank to degas working media of the liquid storage tank;
step three, connecting a filling object, automatically controlling the closing of an electromagnetic valve on a gas path pipeline, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and the upper part of a liquid storage tank and an electric ball valve on a pipeline for connecting the lower part of the liquid storage tank and a filter, and simultaneously automatically controlling the opening of an electric ball valve on a vacuum pumping loop, an electric adjusting valve on a liquid return pipeline, an electric ball valve on a pipeline for connecting the liquid feeding pipeline and a vacuum gauge I, an electric ball valve on the vacuum pumping loop and an electric ball valve on a pipeline for connecting the liquid return pipeline and a vacuum gauge III for vacuumizing;
step four, automatically controlling the opening of an electric ball valve on a connecting pipeline of the lower part of the liquid storage tank and the filter, an electric pressure reducing valve and an electromagnetic valve on a gas path pipeline and an electric regulating valve on a liquid return pipeline, and simultaneously closing an electric ball valve on a vacuumizing loop, an electric ball valve on a pipeline connecting the liquid return pipeline and a vacuum gauge pipe III, an electric ball valve on a pipeline connecting the liquid adding pipeline and a vacuum gauge pipe I and an electric ball valve on a pipeline connecting the liquid adding pipeline and the upper part of the liquid storage tank to fill working medium;
fifthly, liquid return detection is carried out through a flow switch, an electric regulating valve on a liquid return pipeline is automatically controlled to be closed after liquid return is detected, and working medium filling is continued;
and step six, stopping filling the working medium, automatically controlling the closing of an electric ball valve on a connecting pipeline between the lower part of the liquid storage tank and the filter, automatically discharging the working medium by automatically controlling the opening angle and the speed of the electric regulating valve according to the liquid level feedback of a filling object, wherein the capacity of the working medium corresponds to the volume expansion amount under the high-temperature working condition of the rail.
Has the advantages that:
the invention improves the control precision of filling pressure, high-temperature discharge quantity and filling quantity and reduces the requirement on the operation of a human operator by respectively replacing the pressure reducing valve, the manual ball valve and the manual regulating valve with the electric pressure reducing valve, the electromagnetic valve, the electric regulating valve and the electric ball valve and by the automatic control means of the valves; secondly, the automatic control of the whole process of filling vehicle self-checking, working medium degassing, system vacuumizing, system filling, accumulator filling, high-temperature discharge and filling calculation is realized, the risk caused by misoperation of personnel is effectively avoided, the filling efficiency is greatly improved, the occupation of human resources is reduced, the number of the personnel is reduced by not less than 5 and is not more than 2 (for mutual backup), and the manpower is saved for 9 days. And moreover, a flow switch is adopted to detect and fill the returned liquid, a mode of manually judging the filling process through liquid flowing observed by a liquid sight lens is replaced, and automatic judgment of the filling process is realized.
Drawings
FIG. 1 is a simplified piping diagram of a conventional filling apparatus, in which the number of valves is smaller than that of actual equipment;
FIG. 2 is a simplified piping diagram of the automatic filling apparatus of the present invention, in which the number of valves is smaller than that of the actual apparatus.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides an automatic fluid circuit filling device, as shown in fig. 1 and 2, a pressure reducing valve and a manual ball valve BV33 on a raw gas circuit pipeline are replaced by an electric pressure reducing valve PDV01 and an electromagnetic valve ECV33, so that the functions of precise filling air pressure control and air circuit cutoff are realized; the electric pressure reducing valve is adopted to rapidly and accurately control the filling air inlet pressure, so that the accurate control of the pressure filling pressure of 0-1 MPa, the accuracy of 0.005MPa and the response time is realized. The pressure control is carried out without manually controlling the pressure reducing valve, the automatic control of the filling pressure is realized, and the manual misoperation is avoided.
The manual regulating valve BV02 on the original liquid return pipeline is replaced by an electric regulating valve EVD02, so that the accurate control of the filling amount and the filling pressure of the circuit is realized, and the high-temperature release amount is controlled within +/-2 mm; the electric regulating valve is adopted to accurately control the loop filling amount, the valve is required to have good linearity and high control resolution, the accurate discharge control of high-temperature discharge amount can be realized, and the liquid level is controlled to be +/-2 mm. The automatic control device has the advantages that manual multiple discharge amount control is replaced, automatic control of high-temperature discharge amount is achieved, control precision is guaranteed, and misoperation is avoided.
And a flow switch Q is added on a pipeline for connecting the liquid sight glass with the overflow groove, the backflow of the filling working medium is detected, and the filling process is controlled.
And other manual valves on the pipeline are changed into electric ball valves. The electric ball valve is adopted to realize the control of each link of the filling process, and realize the automatic inspection process, the automatic degassing process, the automatic vacuumizing process and the automatic filling process of the filling vehicle; the electric ball valve can bear high vacuum and positive pressure of 1 MPa; the electric ball valve has switch limit feedback, has a stop function and can stop at a middle position. Need not the manual work and carry out valve control, realize valve automated control, avoid artifical maloperation.
And a magnetostrictive liquid level meter is adopted to detect the liquid levels of the liquid storage tank and the overflow tank and calculate the filling amount.
The automatic filling method comprises the following steps:
step one, an automatic filling device is not connected with a filling object, a filling interface A port on a liquid filling pipeline and a liquid return interface B port on a liquid return pipeline are in short circuit, the closing of an electromagnetic valve ECV33 on a gas pipeline, an electric ball valve EV32 on a pipeline connecting the filling interface A port and the upper part of a liquid storage tank and an electric ball valve EV01 on a pipeline connecting the lower part of the liquid storage tank and a filter are automatically controlled through software, meanwhile, the opening of an electric ball valve EV17 on a pipeline connecting a vacuum pump on a vacuumizing loop and a vacuum gauge II VM2, an electric ball valve EV12 on a pipeline connecting a vacuum pump interface D port and an overflow groove on the vacuumizing loop, an electric ball valve EV16 on a pipeline connecting a liquid return interface B port and a vacuum gauge III VM3, an electric regulating valve EDV 8292 on a pipeline connecting the liquid return interface B port and the overflow groove and an electric ball valve EV4 on a pipeline connecting the filling interface A port and the vacuum gauge I1, vacuumizing operation is carried out, the pressure maintaining link is automatically switched to after the vacuum degree meets the requirement, a self-checking result is given after the specified pressure maintaining time is reached, and self-checking is finished; during the whole filling process, the electric ball valves EV41, EV43, EV51 and EV52 are always in a closed state;
step two, after the liquid storage tank is filled with liquid, automatically controlling the closing of an electric ball valve EV16 on a connecting pipeline between a liquid return port B on a liquid return pipeline and a vacuum gauge III VM3, an electric ball valve EV15 on a connecting pipeline between a filling port A and a vacuum gauge I VM1 and an electric ball valve EV01 on a connecting pipeline between the lower part of the liquid storage tank and a filter, simultaneously automatically controlling the opening of an electric ball valve EV17 and an EV12 on a vacuumizing loop, an electric regulating valve EDV02 on the liquid return pipeline and an electric ball valve EV32 on a connecting pipeline between the upper part of the liquid storage tank and the filling port, degassing the working medium of the liquid storage tank, switching to standing after degassing meets the pressure requirement, degassing and standing again after the pressure rises, circulating until the degassing pressure is not changed, and finishing the degassing;
connecting the filling object, wherein the filling interface A and the liquid return interface B are respectively communicated with the filling object; the closing of an electromagnetic valve ECV33 on a gas circuit pipeline, an electric ball valve EV32 on a connecting pipeline of a filling interface A port and the upper part of a liquid storage tank and an electric ball valve EV01 on a connecting pipeline of the lower part of the liquid storage tank and a filter are automatically controlled through software, and meanwhile, the opening of electric ball valves EV17 and EV12 on a vacuumizing loop, an electric adjusting valve EDV02 and an electric ball valve EV16 on a liquid return pipeline and an electric ball valve EV15 on a connecting pipeline of a filling interface A port and a vacuum gauge pipe I VM1 are automatically controlled to vacuumize; automatically switching to a pressure maintaining link after the vacuum degree meets the requirement, giving a system vacuumizing result after the specified pressure maintaining time is reached, and switching to vacuumizing and pressure maintaining again if the vacuum degree does not meet the requirement until the requirement is met;
step four, working medium filling is carried out by automatically controlling the opening of an electric ball valve EV01 on a connecting pipeline between the lower part of the liquid storage tank and the filter, an electric pressure reducing valve PDV01 and an electromagnetic valve ECV33 on a gas pipeline and an electric regulating valve EDV02 on a liquid return pipeline, and simultaneously closing electric ball valves EV17 and EV12 on a vacuumizing loop, an electric ball valve EV15 on a connecting pipeline between a filling interface A port and a vacuum gauge I VM1, an electric ball valve EV16 on a connecting pipeline between a liquid return pipeline and a vacuum gauge III VM3 and an electric ball valve EV32 on a connecting pipeline between a filling interface A port and the upper part of the liquid storage tank;
fifthly, liquid return detection is carried out through a flow switch Q, after liquid return is detected, an electric regulating valve EDV02 on a liquid return pipeline is automatically controlled to be closed, working medium filling is continuously carried out, and the working medium is guaranteed to enter a loop under the action of gas pressure; in the filling process, the electric pressure reducing valve PDV01 dynamically controls the filling pressure to be unchanged;
and step six, stopping filling the working medium, and automatically controlling the closing of the electric ball valve EV01 on the connecting pipeline of the lower part of the liquid storage tank and the filter. Under the high-temperature working condition of the rail, the working medium density is reduced, and the volume expansion brings extra volume increment. In order to ensure the safety of the system, after filling is stopped, working medium discharge corresponding to volume expansion under the high-temperature working condition of the rail is automatically carried out by controlling the opening angle and the speed of the electric regulating valve EDV02 according to the liquid level feedback of a filling object.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A fluid loop automatic filling method is characterized in that a fluid loop automatic filling device is adopted, a pressure reducing valve and a manual ball valve on an original gas path pipeline of the filling device are replaced by an electric pressure reducing valve and an electromagnetic valve, a manual regulating valve on an original liquid return pipeline of the filling device is replaced by an electric regulating valve, and a flow switch is arranged on a pipeline of a sight glass connected with an overflow groove; replacing other manual ball valves on the pipeline with electric ball valves; the automatic filling method comprises the following steps:
firstly, automatically controlling the closing of an electromagnetic valve on a gas circuit pipeline, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and the upper part of a liquid storage tank and an electric ball valve on a pipeline for connecting the lower part of the liquid storage tank and a filter, and simultaneously automatically controlling the opening of two electric ball valves on a vacuumizing loop, an electric regulating valve on a liquid return pipeline, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and a vacuum gauge I and an electric ball valve on a pipeline for connecting a liquid return pipeline and a vacuum gauge III to perform vacuumizing self-inspection;
step two, after the liquid storage tank is filled with liquid, automatically controlling the closing of an electric ball valve on a pipeline for connecting a liquid return pipeline and a vacuum gauge pipe III, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and a vacuum gauge pipe I and an electric ball valve on a pipeline for connecting the lower part of the liquid storage tank and a filter, and simultaneously automatically controlling the opening of two electric ball valves on a vacuumizing loop, an electric regulating valve on the liquid return pipeline and an electric ball valve on a pipeline for connecting the liquid feeding pipeline and the upper part of the liquid storage tank to degas working media of the liquid storage tank;
step three, connecting a filling object, automatically controlling the closing of an electromagnetic valve on a gas path pipeline, an electric ball valve on a pipeline for connecting a liquid feeding pipeline and the upper part of a liquid storage tank and an electric ball valve on a pipeline for connecting the lower part of the liquid storage tank and a filter, and simultaneously automatically controlling the opening of two electric ball valves on a vacuumizing loop, an electric regulating valve on a liquid return pipeline, an electric ball valve on a pipeline for connecting the liquid feeding pipeline and a vacuum gauge I and an electric ball valve on a pipeline for connecting the liquid return pipeline and a vacuum gauge III to vacuumize;
step four, automatically controlling the opening of an electric ball valve on a connecting pipeline of the lower part of the liquid storage tank and the filter, an electric pressure reducing valve and an electromagnetic valve on a gas pipeline and an electric regulating valve on a liquid return pipeline, and simultaneously closing two electric ball valves on a vacuumizing loop, an electric ball valve on a pipeline connecting the liquid return pipeline and a vacuum gauge pipe III, an electric ball valve on a pipeline connecting the liquid adding pipeline and a vacuum gauge pipe I and an electric ball valve on a pipeline connecting the liquid adding pipeline and the upper part of the liquid storage tank to fill working media;
fifthly, liquid return detection is carried out through a flow switch, an electric regulating valve on a liquid return pipeline is automatically controlled to be closed after liquid return is detected, and working medium filling is continued;
and step six, stopping filling the working medium, automatically controlling the lower part of the liquid storage tank and the electric ball valve on a connecting pipeline of the filter to be closed, and automatically discharging the working medium by automatically controlling the opening angle and the speed of the electric regulating valve according to the liquid level feedback of a filling object, wherein the discharge amount of the working medium is the volume expansion amount under the high-temperature working condition of the rail.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910482791.9A CN110371917B (en) | 2019-06-04 | 2019-06-04 | Automatic filling device and method for fluid loop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910482791.9A CN110371917B (en) | 2019-06-04 | 2019-06-04 | Automatic filling device and method for fluid loop |
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| CN110371917A CN110371917A (en) | 2019-10-25 |
| CN110371917B true CN110371917B (en) | 2020-12-11 |
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| CN111483969B (en) * | 2020-04-22 | 2022-01-28 | 中国科学院空间应用工程与技术中心 | Liquid working medium filling device and method applied to loop system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4704710B2 (en) * | 2004-08-26 | 2011-06-22 | 武蔵エンジニアリング株式会社 | Liquid dispensing device |
| CN200992483Y (en) * | 2006-12-28 | 2007-12-19 | 东风汽车股份有限公司 | Simple power steering engine oil vacuum filling machine |
| CN102297339B (en) * | 2011-07-29 | 2013-11-20 | 奇瑞汽车股份有限公司 | Control loop capable of changing filling pressure and control method thereof |
| CN202793682U (en) * | 2012-07-17 | 2013-03-13 | 奇瑞汽车股份有限公司 | Detection loop which can simulate vacuum degree of tail end of automobile pipeline |
| CN104261338B (en) * | 2014-10-22 | 2017-01-11 | 奇瑞汽车股份有限公司 | Brake fluid filling device and method |
| CN205004383U (en) * | 2015-08-27 | 2016-01-27 | 四川国软科技发展有限责任公司 | Automatic liquid feeding car of CRH1 EMUs battery |
| CN106564847A (en) * | 2016-10-19 | 2017-04-19 | 奇瑞汽车股份有限公司 | Liquid filling equipment |
| CN106542488B (en) * | 2016-12-08 | 2019-09-20 | 北京航天试验技术研究所 | A kind of novel portable fluid circuit filling apparatus |
| CN206572793U (en) * | 2017-02-04 | 2017-10-20 | 济南大森制冷设备有限公司 | A kind of open-type helical-lobe compressor Parallel sets |
| CN206680177U (en) * | 2017-03-14 | 2017-11-28 | 陕西航天德林科技集团有限公司 | A kind of layered extraction device of mixed liquor |
| CN207903897U (en) * | 2017-11-30 | 2018-09-25 | 北京航天试验技术研究所 | A kind of portable level pressure inflation filling automatic control device |
| CN208070076U (en) * | 2018-03-12 | 2018-11-09 | 上海卫星工程研究所 | A kind of fluid loop system degasification charging device |
| CN208856891U (en) * | 2018-09-29 | 2019-05-14 | 济南锐骏自动化设备有限公司 | Brake fluid vacuum filling machine |
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