CN110894910A - Leakage-free detection system and method for sealing device with alarm - Google Patents
Leakage-free detection system and method for sealing device with alarm Download PDFInfo
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- CN110894910A CN110894910A CN201911269186.XA CN201911269186A CN110894910A CN 110894910 A CN110894910 A CN 110894910A CN 201911269186 A CN201911269186 A CN 201911269186A CN 110894910 A CN110894910 A CN 110894910A
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- pressure
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- liquid mixture
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- 238000007789 sealing Methods 0.000 title claims abstract description 88
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 239000000203 mixture Substances 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 239000011368 organic material Substances 0.000 claims abstract description 4
- 125000006850 spacer group Chemical group 0.000 claims description 28
- 238000002955 isolation Methods 0.000 claims description 22
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007853 buffer solution Substances 0.000 claims 2
- 239000000126 substance Substances 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000012855 volatile organic compound Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 239000002360 explosive Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model provides a be used for having sealing device's of reporting to police leak detection system and method exempt from, there is sealing device who is used for loading or transmission volatile organic material, the sealing mechanism who seals is carried out through the buffer fluid that sets up in each sealed point department of sealing device, the pressure of buffer fluid is less than the pressure of the interior material of sealing device, the feed liquor port of the buffer fluid feed liquor pipe of connection on the buffer fluid feed liquor inlet in every sealing mechanism all passes through the liquid outlet of buffer fluid feed liquor main line connection accumulator, the exit end of the high-pressure gas-liquid mixture discharge pipe of connection on the high-pressure gas-liquid mixture outlet in every sealing mechanism all passes through high-pressure gas-liquid mixture collection pipeline connection to the high-pressure gas-liquid mixture entry of accumulator, the blast pipe that sets up in the accumulator top. The invention has simple structure, easy operation and low installation cost. The method can be applied to a system for preventing leakage detection of sealing points (non-double-end mechanical seal) of oil refineries, chemical plant equipment and pipeline components.
Description
Technical Field
The invention relates to a leak-free detection system. And more particularly to a leak free detection system and method for a seal having an alarm.
Background
To date, only devices with double mechanical seal assemblies have been free of leak detection systems in oil refineries, chemical plant equipment and pipeline assembly sealing points worldwide. Other seals are as follows: packing, gaskets, washers, and all static seals are not immune to leak detection.
As shown in fig. 1 and 2 and disclosed in the patent application "sealing structure and sealing method of high pressure liquid or gas barrier type flange" of invention with application number 2018107591814, a non-mechanical sealing mechanism 3 is provided between the upstream and downstream flanges 2, and a spacer liquid 4 capable of preventing leakage of gaseous materials in the material 1 is provided to be fed from the outside and discharged again through both the upstream and downstream sides of the sealing mechanism 3. The pressure of the spacer fluid 4 is slightly greater than the pressure of the gaseous material.
Strict regulations are set for the unorganized emission control of volatile organic compounds, such as page 8 in the volatile organic compound unorganized emission control standard GB37822-2019 (implemented by 2019-07-01):
8.3.2 the equipment and pipeline assembly meets one of the following conditions, which can avoid leakage detection:
a. in a normal working state, the system is in a negative pressure state;
b. adopting a canned motor pump, a magnetic pump, a diaphragm pump, a bellows pump, a double-end mechanical seal pump with the pressure of the sealing isolation liquid higher than the process pressure or a pump with the same efficiency;
c. adopting a shielding compressor, a magnetic compressor, a diaphragm compressor, a double-end mechanical sealing compressor with the pressure of sealing isolation liquid higher than the process pressure or a compressor with the same efficiency;
d. adopting a shielding stirrer, a magnetic stirrer, a double-end mechanical seal stirrer with the pressure of the sealing isolation liquid higher than the process pressure or a stirrer with the same function;
e. adopting a shielding valve, a diaphragm valve, a corrugated pipe valve or a valve with the same equivalent function, and a pressure release valve with an upstream provided with a rupture disk;
f. equipment and pipeline components equipped with a seal failure detection and alarm system;
g. invasive (semi-invasive) pumps and other devices and pipeline components that cannot be measured due to invasion or burying under the ground and pipeline insulation;
h. a VOCs waste gas collecting system is installed, and leaked VOCs can be collected and conveyed to be treated and implemented;
i. other equivalent measures are taken.
A plurality of sealing points exist in oil refining and chemical enterprises, the sealing points are often leaked, if the leakage amount is large, pollution is caused, and safety production (materials are flammable and explosive), occupational health (materials are toxic and harmful), energy conservation (material loss), cost (investment increase) and the like are also accompanied. Therefore, the national standard requires that all sealing points of equipment and pipeline components are managed, and leakage detection, repair, re-detection and re-repair are carried out periodically and repeatedly. The device can be free from detection and repair unless meeting volatile organic compound unorganized emission control standard GB37822-2019 item 8.3.2, but at present, no technology and method for online detection and alarm of sealing failure of a sealing point of each non-double-end mechanical seal exists, and equipment and pipeline components of a sealing point sealing failure detection and alarm system for each non-double-end mechanical seal cannot be equipped; and the VOCs waste gas collecting system leaked from each sealing point of the equipment and pipeline assembly cannot be installed, and the leaked VOCs can be collected and conveyed to be treated and implemented; other types of seals than double mechanical seals (e.g., packing, gaskets, washers, and all static seals) are not subject to leakage detection.
Disclosure of Invention
The invention aims to provide a leakage-free detection system and method for a sealing device with an alarm.
The technical scheme adopted by the invention is as follows: the utility model provides a be used for having sealing device's of warning leak testing exempts from, is including the sealing device who is used for loading or transmission volatile organic material, and sets up each sealing point department of sealing device carries out the sealing mechanism that seals through the spacer fluid, wherein, the pressure of spacer fluid is less than the pressure of material in the sealing device, every the inlet port of the spacer fluid feed pipe of connection on the spacer fluid inlet in the sealing mechanism all connect the liquid outlet of the inside accumulator that is equipped with the spacer fluid through the total pipeline of spacer fluid feed, connect every the exit end of the high-pressure gas-liquid mixture discharge pipe on the high-pressure gas-liquid outlet in the sealing mechanism all is connected to the high-pressure gas-liquid mixture entry of accumulator through high-pressure gas-liquid mixture collection pipeline, the blast pipe that is used for discharging the gaseous state material after the decomposition that sets up at the accumulator top connects the gaseous state material processing apparatus who is used for collecting the processing gaseous, the decomposed spacer fluid enters the sealing mechanism through a spacer fluid inlet main pipeline connected to a fluid outlet of the pressure accumulator to continue to circulate.
And each high-pressure gas-liquid mixture discharge pipe is provided with a flowmeter.
And a pump for driving the high-pressure gas-liquid mixture to flow is arranged on the high-pressure gas-liquid mixture collecting pipeline close to the pressure accumulator.
The pressure accumulator is provided with a pressure gauge for checking the pressure in the pressure accumulator.
The pressure accumulator is provided with a spacer fluid replenishing pipe for replenishing spacer fluid to the inside, and the spacer fluid replenishing pipe is provided with a switch valve.
The pressure limiting valve is connected with an alarm device which gives an alarm when the pressure in the exhaust pipe exceeds the set pressure.
The isolating liquid is a liquid which is not compatible with materials under the normal pressure state.
A detection method for a leakage-free detection system of a sealing device with an alarm is provided, which aims at a totally-enclosed device consisting of equipment and a plurality of sealing points of a pipeline assembly, wherein each sealing point is provided with a sealing mechanism sealed by isolation liquid, the pressure of the isolation liquid is less than the pressure of materials in the sealing device, high-pressure gas-liquid mixture discharged by the sealing mechanisms is collected into an accumulator through a main pipeline and decomposed in the accumulator, the alarm device alarms when the pressure in the accumulator exceeds a set pressure, and normal-pressure gaseous materials decomposed by the accumulator are conveyed to a gaseous material processing device.
The leakage-free detection system and method for the sealing device with the alarm function have the advantages of simple structure, easiness in operation and low installation cost. The method can be applied to a system for preventing leakage detection of sealing points (non-double-end mechanical seal) of oil refineries, chemical plant equipment and pipeline components. The invention has the following advantages:
1. emission reduction, no leakage and no pollution;
2. energy is saved, the conversion rate of the raw materials into products is improved, and the energy is saved and not wasted;
3. the material is flammable and explosive, and explosion and fire accidents can be avoided without leakage;
4. health, the materials are all toxic and harmful substances, and can induce various diseases;
5. the trouble is saved, the leakage detection is avoided, and the labor is saved if the leakage detection and the repair are avoided;
6. the data is real and reliable, and the robot is used for replacing a human for detection, so that no thought factor exists;
7. simple structure, easy operation and low installation cost.
Drawings
FIG. 1 is a schematic structural view of a prior art non-mechanical sealing mechanism;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic diagram of a leak free detection system for a seal with alarm.
In the drawings
F1: and (4) flow meter PI: pressure gauge
1: material 2: upstream and downstream flanges
3: the sealing mechanism 4: spacer fluid
41. 42, … … 4i … … 4 n: spacer fluid feed liquor pipe 5: sealing device
6: a main isolating liquid inlet pipeline 7: pressure accumulator
81. 82, … … 8i … … 8 n: high-pressure gas-liquid mixture outlet
91. 92, … … 9i … … 9 n: high-pressure gas-liquid mixture discharge pipe
10: high-pressure gas-liquid mixture collecting pipeline 11: high-pressure gas-liquid mixture inlet
12: the pump 13: exhaust pipe
14: the pressure limiting valve 15: gaseous material processing device
16: spacer fluid replenishing pipe 17: switch valve
18: alarm device
Detailed Description
A leak-free detection system and method for a seal device with alarm according to the present invention will be described in detail with reference to the following embodiments and accompanying drawings.
The invention relates to a leakage-free detection system and a method for a sealing device with an alarm, which aim at other forms of multiple sealing points (non-double-end mechanical sealing) such as: the packing, gasket, washer and all static seal points establish a seal spacer fluid and make the pressure to which it is subjected lower than the process pressure, equipment and pipeline components equipped with a seal point (non-double-end mechanical seal) failure detection and alarm system, and a leak-free detection system and method that install a VOCs waste gas collection system and can capture and transport leaked VOCs to process implementation and that comply with GB 37822-2019.
As shown in fig. 3, the leak-free detection system for sealing device with alarm of the present invention comprises a sealing device 5 for loading or transporting volatile organic material 1, and a sealing mechanism 3 disposed at each sealing point of the sealing device 5 and sealed by a spacer fluid 4, wherein the spacer fluid 4 is a liquid immiscible with the material 1 under normal pressure. The pressure of the isolation liquid is smaller than that of the material 1 in the sealing device 5, the pressure difference between the isolation liquid and the material 1 is reduced, the pressure difference is in direct proportion to the leakage speed, so that the rapid leakage of the material 1 can be avoided, and meanwhile, the phenomenon that the isolation liquid 4 leaks into the material 1 in a small amount to pollute the material (reduce the purity of the material) is avoided. The liquid inlet ports of the isolating liquid inlet pipes 41, 42 and … … 4i … … 4n connected with the isolating liquid inlet in each sealing mechanism 3 are connected with the liquid outlet of the pressure accumulator 7 with normal pressure isolating liquid 4 inside through an isolating liquid inlet main pipeline 6, the outlet ends of the high-pressure gas-liquid mixture outlet pipes 91, 92 and … … 9i … … 9n connected with the high-pressure gas-liquid mixture outlets 81, 82 and … … 8i … … 8n in each sealing mechanism 3 are connected with the high-pressure gas-liquid mixture inlet 11 of the pressure accumulator 7 through a high-pressure gas-liquid mixture collecting pipeline 10, the high-pressure gas-liquid mixture collecting pipeline 10 is provided with a pump 12 for driving the high-pressure gas-liquid mixture to flow at a position close to the accumulator 7, and each of the high-pressure gas-liquid mixture discharge pipes 91, 92 and … … 9i … … 9n is provided with a flow meter F1.
The exhaust pipe 13 which is arranged at the top end of the pressure accumulator 7 and used for discharging decomposed gaseous materials is connected with a gaseous material processing device 15 used for collecting and processing the gaseous materials through a pressure limiting valve 14, the pressure limiting valve 14 is used for adjusting the pressure in the exhaust pipe 13, and the pressure limiting valve 14 is connected with an alarm device 18 which gives an alarm when the pressure in the exhaust pipe 13 exceeds a set pressure. The alarm device 18 may be a buzzer or a display.
The decomposed spacer fluid 4 enters the sealing mechanism 3 through a spacer fluid inlet main pipeline 6 connected to a fluid outlet of the pressure accumulator 7 to continue circulation.
The pressure accumulator 7 is provided with a pressure gauge PI for checking the pressure in the pressure accumulator 7. The pressure accumulator 7 is also provided with a spacer fluid supplementing pipe 16 for supplementing spacer fluid to the inside, and the spacer fluid supplementing pipe 16 is provided with a switch valve 17.
The invention discloses a detection method of a leakage-free detection system for a sealing device with an alarm, which aims at a totally-enclosed device consisting of equipment and a plurality of sealing points of a pipeline assembly, wherein each sealing point is provided with a sealing mechanism sealed by isolation liquid, the pressure of the isolation liquid is less than the pressure of materials in the sealing device, high-pressure gas-liquid mixture discharged by the sealing mechanisms is collected into a pressure accumulator through a main pipeline and decomposed in the pressure accumulator, the alarm device alarms when the pressure in the pressure accumulator exceeds a set pressure, and normal-pressure gaseous materials decomposed by the pressure accumulator are conveyed to a gaseous material processing device. Namely, the pressure of the isolation liquid is slightly less than that of the material, the pressure difference between the isolation liquid and the material is reduced, and the pressure difference is in direct proportion to the leakage speed, so that the rapid leakage of the material can be avoided, and meanwhile, the phenomenon that the isolation liquid leaks into the material in a small amount to pollute the material (reduce the purity of the material) is also avoided. Along with the accumulation of the leaked materials, the pressure in the pressure accumulator is slowly increased, the alarm device immediately alarms when the pressure exceeds the set pressure so as to take corresponding measures, a small amount of gas materials leaked from the sealing device are not emitted into the atmosphere, the alarm device alarms and timely takes measures, and the gas materials 1 are completely recycled and conveyed into the gas material processing device 15 by virtue of flowing isolation liquid, so that zero emission is realized.
Claims (8)
1. The leakage-free detection system for the sealing device with the alarm function comprises sealing devices (5) used for loading or transmitting volatile organic materials (1) and sealing mechanisms (3) arranged at sealing points of the sealing devices (5) and sealed through isolation liquid (4), wherein the pressure of the isolation liquid is smaller than the pressure of the materials (1) in the sealing devices (5), and is characterized in that liquid inlet ports of isolation liquid inlet pipes (41, 42, … … 4i … … 4n) connected to liquid inlet ports of the isolation liquid in each sealing mechanism (3) are connected with a liquid outlet of a pressure accumulator (7) internally provided with the isolation liquid (4) through an isolation liquid inlet main pipeline (6), and high-pressure gas-liquid mixture outlet pipes (91, a high-pressure gas-liquid mixture outlet pipe (81, 82, … … 8i … … 8n) connected to high-pressure gas-liquid mixture outlets (81, 82, … … i … … n) in each sealing mechanism (3), 92. … … 9i … … 9n) is connected to through high-pressure gas-liquid mixture collection pipeline (10) the high-pressure gas-liquid mixture entry (11) of accumulator (7) sets up blast pipe (13) that are used for discharging gaseous state material after the decomposition on accumulator (7) top are connected through pressure limiting valve (14) and are used for collecting gaseous state material processing apparatus (15) of handling gaseous state material, and the buffer solution (4) after the decomposition gets into sealing mechanism (3) and continues the circulation through the total pipeline of buffer solution feed liquid (6) of connecting on accumulator (7) liquid outlet.
2. A leak-free detection system for a sealing device with alarm according to claim 1, characterized in that each of said high-pressure gas-liquid mixture discharge pipes (91, 92, … … 9i … … 9n) is provided with a flow meter (F1).
3. The leak-free detection system for a sealing device with an alarm as claimed in claim 1, characterized in that the high-pressure gas-liquid mixture collecting pipe (10) is provided with a pump (12) for driving the high-pressure gas-liquid mixture to flow near the pressure accumulator (7).
4. A leak-free detection system for a sealing device with alarm according to claim 1, characterized in that the pressure accumulator (7) is provided with a pressure gauge (PI) for checking the pressure in the pressure accumulator (7).
5. The leak-free detection system for a sealing device with alarm according to claim 1, characterized in that the pressure accumulator (7) is provided with a spacer fluid replenishing pipe (16) for replenishing spacer fluid to the inside, and the spacer fluid replenishing pipe (16) is provided with a switch valve (17).
6. A leak-free detection system for a sealing device with alarm according to claim 1, characterized in that an alarm device (18) for alarming when the pressure in the exhaust pipe (13) exceeds a set pressure is connected to the pressure limiting valve (14).
7. A leak-free detection system for a sealing device with alarm according to claim 1, characterized in that the spacer fluid (4) is a fluid which is immiscible with the material (1) under normal pressure conditions.
8. A detection method of a leakage-free detection system for a sealing device with an alarm is characterized in that a fully-closed device consisting of a plurality of sealing points of equipment and a pipeline assembly is provided, a sealing mechanism sealed through isolation liquid is arranged at each sealing point, the pressure of the isolation liquid is smaller than the pressure of materials in the sealing device, high-pressure gas-liquid mixture discharged by the sealing mechanisms is collected into a pressure accumulator through a main pipeline and decomposed in the pressure accumulator, the alarm device gives an alarm when the pressure in the pressure accumulator exceeds a set pressure, and normal-pressure gaseous materials decomposed by the pressure accumulator are conveyed to a gaseous material processing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911269186.XA CN110894910A (en) | 2019-12-11 | 2019-12-11 | Leakage-free detection system and method for sealing device with alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911269186.XA CN110894910A (en) | 2019-12-11 | 2019-12-11 | Leakage-free detection system and method for sealing device with alarm |
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| CN110894910A true CN110894910A (en) | 2020-03-20 |
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| CN201911269186.XA Pending CN110894910A (en) | 2019-12-11 | 2019-12-11 | Leakage-free detection system and method for sealing device with alarm |
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|---|---|---|---|---|
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| CN201723458U (en) * | 2010-05-17 | 2011-01-26 | 张继华 | Multistage submerged pump with leakage-detecting alarm device |
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| CN208858632U (en) * | 2018-09-11 | 2019-05-14 | 大庆中蓝石化有限公司 | A kind of lye medium mechanical face seals of centrifugal pumps system |
| CN110945249A (en) * | 2017-07-26 | 2020-03-31 | 株式会社荏原制作所 | Pump and sealing system |
| CN211526097U (en) * | 2019-12-11 | 2020-09-18 | 天津长瑞大通流体控制系统有限公司 | Leakage-free detection system for sealing device with alarm function |
-
2019
- 2019-12-11 CN CN201911269186.XA patent/CN110894910A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035876A (en) * | 1987-12-11 | 1989-09-27 | 布隆福斯造船公司 | The sealing configuration of the screw shaft of ship |
| JPH0850076A (en) * | 1994-08-05 | 1996-02-20 | Press Kogyo Kk | Apparatus and method for diagnosing leakage of mechanical seal |
| CN1269872A (en) * | 1998-03-13 | 2000-10-11 | 株式会社日立制作所 | Centrifugal compressor and shaft seal used thereof |
| CN201723458U (en) * | 2010-05-17 | 2011-01-26 | 张继华 | Multistage submerged pump with leakage-detecting alarm device |
| CN102192182A (en) * | 2011-05-17 | 2011-09-21 | 浙江天德泵业有限公司 | Seal combined structure of centrifugal pump |
| CN104389807A (en) * | 2014-11-21 | 2015-03-04 | 中国成达工程有限公司 | Shaft seal structure of centrifugal coal slurry pump |
| CN204985708U (en) * | 2015-09-17 | 2016-01-20 | 约翰克兰科技（天津）有限公司 | Automatic mechanical seal system of fluid infusion pressurize |
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