CN109441846A - A kind of immersed pump sealing monitoring device - Google Patents
A kind of immersed pump sealing monitoring device Download PDFInfo
- Publication number
- CN109441846A CN109441846A CN201811237651.7A CN201811237651A CN109441846A CN 109441846 A CN109441846 A CN 109441846A CN 201811237651 A CN201811237651 A CN 201811237651A CN 109441846 A CN109441846 A CN 109441846A
- Authority
- CN
- China
- Prior art keywords
- monitoring
- sealing
- main body
- seal
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
Abstract
The invention discloses a kind of immersed pumps to seal monitoring device, belongs to marine machinery technical field.By the setting of auxiliary seal monitoring assembly in pump main body, make to form seal chamber between auxiliary seal monitoring assembly, pump main body and connecting shaft.Monitoring oil is poured into monitoring case, is monitored oil along the connecting tube of connection monitoring case and seal chamber and is entered seal chamber until filling up seal chamber, the gas in seal chamber is discharged by exhaust pipe.The pressure for the hydraulic oil for being less than the pressure of monitoring oil in pump main body, when pumping the mechanical seal appearance breakage between main body and connecting shaft, hydraulic oil in pump main body can leak in seal chamber, increase the volume of the monitoring oil in seal chamber so that part monitoring oil is extruded into monitoring case, the position of the monitoring oil in monitoring case can increase.Staff can judge to pump whether the mechanical seal between main body and connecting shaft damages by monitoring the volume change of oil in monitoring case, and then mechanical seal is replaced or repaired in time, improve the job stability of immersed pump.
Description
Technical field
The present invention relates to marine machinery technical field, in particular to a kind of immersed pump seals monitoring device.
Background technique
Immersed pump is a kind of pump for immersing in oil carrier cargo tank and carrying out the transmission of liquid goods, is widely used in product carrier, changes
In the oil tankers such as product ship.The structure of immersed pump mainly includes pump main body and impeller, and pump main body is connected with impeller by connecting shaft.Pump
The part that main body is connected with impeller be required to immerse liquid goods medium in realize pump main body and impeller extract goods medium and will
It transports and is provided with mechanical seal at the position being connected to the function at other positions, pump main body with connecting shaft, to avoid pump main body
In hydraulic oil penetrate into liquid goods medium in, influence the normal work of immersed pump.
But since the part that pump main body is connected with impeller is immersed in liquid goods medium, even if pump main body is connected with connecting shaft
Position at mechanical seal occur breakage cause pump main body in hydraulic oil penetrate into liquid goods medium in, staff is also difficult to examine
Feel, the job stability of immersed pump is affected.
Summary of the invention
The embodiment of the invention provides a kind of immersed pumps to seal monitoring device, can be improved the job stability of immersed pump.
The technical solution is as follows:
The embodiment of the invention provides a kind of immersed pumps to seal monitoring device, and the immersed pump sealing monitoring device is suitable for
Including at least the immersed pump of pump main body and impeller, pass through connection axis connection, the latent liquid between the impeller and the pump main body
Pump seal monitoring device includes sealing monitoring assembly and auxiliary seal monitoring assembly,
The auxiliary seal monitoring assembly is arranged in the pump main body, and the auxiliary seal monitoring assembly and the pump are led
Be tightly connected between body, between the auxiliary seal monitoring assembly and the connecting shaft, the auxiliary seal monitoring assembly with
It is formed with seal chamber between the connecting shaft,
The sealing monitoring assembly includes monitoring case, connecting tube and exhaust pipe, and opening is provided in the monitoring case, described
One end of connecting tube is connected to the monitoring case, and the other end of the connecting tube is connected to the seal chamber, one end of the exhaust pipe
It is connected to the seal chamber, the other end of the exhaust pipe is connected to atmosphere.
Optionally, the other end of the exhaust pipe is arranged in the monitoring case.
Optionally, the sealing monitoring assembly further includes annulus and connecting plate, one end of the annulus and institute
Monitoring case connection is stated, the other end of the annulus is connect with the connecting plate, and through-hole is provided on the connecting plate, described
Through-hole is connected to the other end of the annulus Yu the connecting tube,
Angle between the axis of the through-hole and the axis of the annulus is α, wherein 0 ° < α < 180 °.
Optionally, connecting hole is provided on the connecting plate, the exhaust pipe is plugged in the connecting hole, the exhaust
Pipe protrudes into the monitoring case across the annulus.
Optionally, sealing ring pipe is provided on the connecting plate, the sealing ring pipe is connected to the through-hole, described
Connecting tube is coaxially set on the sealing ring pipe.
Optionally, the immersed pump sealing monitoring device further includes dust cap, and the dust cap setting is over said opening.
Optionally, transparent liquidometer is provided in the monitoring case.
Optionally, the auxiliary seal monitoring assembly includes sealing plate and sealing bucket, and the sealing plate is arranged in the pump
On one end of the impeller, the sealing bucket is connected main body with the sealing plate, and the connecting shaft runs through the sealing plate
With the sealing bucket, it is tightly connected between the sealing plate and the pump main body, between the sealing plate and the connecting shaft,
The seal chamber is formed between the pump main body, the sealing bucket, the sealing plate and the connecting shaft.
Optionally, sealing element is provided between the connecting shaft and the sealing bucket.
Optionally, the sealing element is made of resistant material.
Technical solution provided in an embodiment of the present invention has the benefit that in the use process of immersed pump, will be auxiliary
It helps the setting of sealing monitoring assembly in pump main body, makes to form seal chamber between auxiliary seal monitoring assembly, pump main body and connecting shaft.
And the connecting tube sealed in monitoring assembly is made to be separately connected monitoring case and seal chamber, prison can be poured into monitoring case by opening
Oil is surveyed, monitoring oil enters seal chamber until filling up seal chamber along connecting tube, and the gas in seal chamber is expelled to atmosphere by exhaust pipe.
The pressure for the hydraulic oil for being less than the pressure of monitoring oil in pump main body, when the mechanical seal between pump main body and connecting shaft is broken
When damage, the hydraulic oil pumped in main body can be leaked in seal chamber, increase the volume of the monitoring oil in seal chamber so that part is supervised
It surveys oil to be extruded into monitoring case, the position of the monitoring oil in monitoring case can increase.Staff can be by monitoring in monitoring case
The volume change of oil judges whether the mechanical seal pumped between main body and connecting shaft damages, and then carries out more to mechanical seal in time
It changes or repairs, improve the job stability of immersed pump.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described,
Fig. 1 is a kind of schematic diagram of the use state of immersed pump sealing monitoring device provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of auxiliary seal monitoring assembly provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of sealing monitoring assembly provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of schematic diagram of the use state of immersed pump sealing monitoring device provided in an embodiment of the present invention, to say
The application scenarios of bright immersed pump sealing monitoring device provided in an embodiment of the present invention, below with reference to Fig. 1 to the embodiment of the present invention
It is explained.As shown in Figure 1, immersed pump sealing monitoring device 1 is suitable for including at least pump main body 101 and impeller 102
Immersed pump 10 is connected by connecting shaft 103 between impeller 102 and pump main body 101, pumps and be arranged between main body 101 and connecting shaft 103
There is mechanical seal 104.At work, pump main body 101 submerges immersed pump 10 with the junction of connecting shaft 103 and impeller 102
In liquid goods medium 20.
As shown in Figure 1, immersed pump sealing monitoring device 1 includes sealing monitoring assembly 11 and auxiliary seal monitoring assembly 12.
Fig. 2 is the structural schematic diagram of auxiliary seal monitoring assembly provided in an embodiment of the present invention, auxiliary seal monitoring assembly
12 are arranged in pump main body 101,
Auxiliary seal monitoring assembly 12 setting pump main body 101 on, auxiliary seal monitoring assembly 12 and pump main body 101 it
Between, be tightly connected between auxiliary seal monitoring assembly 12 and connecting shaft 103, auxiliary seal monitoring assembly 12 and connecting shaft 103
Between be formed with seal chamber 13, filled in seal chamber 13 monitoring oil 14.
Fig. 3 is the structural schematic diagram of sealing monitoring assembly provided in an embodiment of the present invention, and sealing monitoring assembly 11 includes prison
Measuring tank 111, connecting tube 112 and exhaust pipe 113, opening 111a is provided in monitoring case 111, and one end of connecting tube 112 is connected to prison
Measuring tank 111, the other end communication seals chamber 13 of connecting tube 112, one end communication seals chamber 13 of exhaust pipe 113, exhaust pipe 113
The other end is connected to atmosphere.
As shown in Fig. 2, being provided between pump main body 101 and connecting shaft 103 prevents the hydraulic oil 30 in pump main body 101 from entering
The mechanical seal 104 of liquid goods medium 20.
In the use process of immersed pump 10, by the setting of auxiliary seal monitoring assembly 12 in pump main body 101, make to assist close
It seals between monitoring assembly 12, pump main body 101 and connecting shaft 103 and forms seal chamber 13.And make to seal the connection in monitoring assembly 11
Pipe 112 is separately connected monitoring case 111 and seal chamber 13, monitoring oil 14, prison can be poured into monitoring case 111 by the 111a that is open
It surveys oil 14 and enters seal chamber 13 until filling up seal chamber 13 along connecting tube 112, the gas in seal chamber 13 is discharged by exhaust pipe 113
To atmosphere.The pressure for the hydraulic oil 30 for being less than the pressure of monitoring oil 14 in pump main body 101, when pump main body 101 and connecting shaft 103
Between mechanical seal 104 when there is breakage, the hydraulic oil 30 pumped in main body 101 can leak in seal chamber 13, make seal chamber
The volume of monitoring oil 14 in 13 increases to be extruded into monitoring case 111 so that partially monitoring oil 14, the monitoring in monitoring case 111
The position of oil 14 can increase.Staff can pump main body 101 by the volume change judgement of monitoring oil 14 in monitoring case 111 and connect
Whether the mechanical seal 104 between spindle 103 damages, and then mechanical seal 104 is replaced or repaired in time, improves latent
The job stability of liquid pump 10.
In embodiments of the present invention, mechanical seal 104 may include rotary packing ring 104a and stationary seal ring 104b, rotary packing ring
One O-ring seals 104c is set between 104a and connecting shaft 103 and forms radial static seal, stationary seal ring 104b and and sealing plate
Between one O-ring seals 104c of setting form end face static seal, hydraulic oil 30 is sealed in pump main body 101.In this hair
In other situations that bright embodiment provides, other structures are can also be used in mechanical seal 104, and the present invention is without limitation.
As shown in Fig. 2, auxiliary seal monitoring assembly 12 may include sealing plate 121 and sealing bucket 122, sealing plate 121 is arranged
In pump main body 101 on one end of impeller 102, sealing bucket 122 is connected with sealing plate 121, and connecting shaft 103 runs through sealing plate
121 with sealing bucket 122, be tightly connected between sealing plate 121 and pump main body 101, between sealing plate 121 and connecting shaft 103, it is close
Envelope chamber 13 is formed between pump main body 101, sealing bucket 122, sealing plate 121 and connecting shaft 103.In this set, sealing plate
121 can realize connection from the pump main body 101 of different contour structures, improve the versatility of immersed pump sealing monitoring device 1.
Optionally, sealing plate 121 and pump main body 101 between can be bolted, sealing plate 121 and pump main body 101 it
Between be provided with sealing ring, may also set up sealing ring between sealing plate 121 and mechanical seal 104, avoid mechanical seal 104 in breakage
When pump main body 101 in hydraulic oil 30 revealed by other positions, make immersed pump seal monitoring device 1 can relatively accurately react
The damaged time of mechanical seal 104.
Illustratively, it may be provided with rotating shaft lip-shaped sealing part 123 between sealing plate 121 and connecting shaft 103.Rotary shaft lip
Shape sealing element 123 is conducive to reduce the disclosure risk of hydraulic oil 30 in pump main body 101, and the use for being conducive to improve immersed pump 10 is steady
It is qualitative.
Optionally, rotating shaft lip-shaped sealing part 123 herein can be single lip rotating shaft lip-shaped sealing part, on sealing plate 121
It is provided with the mounting hole 121a of corresponding single lip rotating shaft lip-shaped sealing part 124, single setting of lip rotating shaft lip-shaped sealing part 124 is being pacified
It fills in the 121a of hole, direction setting of the lip of single lip rotating shaft lip-shaped sealing part 124 away from pump main body 101, single lip rotary shaft lip
The lip of shape sealing element 124 offsets with connecting shaft 103, and auxiliary seal monitoring assembly 12 further includes mounting plate 123, mounting plate 123
It is fixed on sealing plate 121, single lip rotating shaft lip-shaped sealing part 124 is fixed in mounting hole 121a, guarantee single lip rotation
The using effect of axis lippacking 124.This set also can avoid the case where monitoring oil 14 enters pump main body 101 occur, protect
The constancy of volume for demonstrate,proving monitoring oil 14 in seal chamber 13 makes immersed pump sealing monitoring device 1 that can relatively accurately react mechanical seal
104 damaged times.
Further, sealing element 124 is provided between connecting shaft 103 and sealing bucket 122.The setting of the sealing element 124 can
It plays and monitoring oil 14 is avoided the case where mutually flowing occur with the liquid goods medium 20 outside seal chamber 13, guarantee immersed pump sealing monitoring
The accuracy that device 1 reacts.125
Optionally, sealing element 124 can be lips rotating shaft lip-shaped sealing part.The peace of lips rotating shaft lip-shaped sealing part herein
Dress mode is similar with the setting of single lip rotating shaft lip-shaped sealing part 124, therefore details are not described herein again lips rotating shaft lip-shaped sealing
The installation process of part.
Optionally, sealing element 124 is made of resistant material.To extend the use longevity of immersed pump sealing monitoring device 1
Life.
As shown in Fig. 2, auxiliary seal monitoring assembly 12 may also include axle sleeve 125, axle sleeve 125 is coaxially set in connecting shaft
On 103, sealing ring 126 is provided between axle sleeve 125 and connecting shaft 103, and axle sleeve 125 is located at stationary seal ring 104b and connecting shaft
Between 103, sealing plate 121, sealing bucket 122 can be set on axle sleeve 125, and.The setting of axle sleeve 125 can reduce connecting shaft
Friction between 103 and sealing plate 121 and seal receptacle guarantees the service life of immersed pump sealing monitoring device 1.
Settable sleeve sealing part 125a between axle sleeve 125 and connecting shaft 102.
As shown in figure 3, the other end of exhaust pipe 113 may be provided in monitoring case 111.The setting of exhaust pipe 113 is being monitored
The volume occupied required for immersed pump sealing monitoring device 1 can be reduced in case 111.
As shown in figure 3, sealing monitoring assembly 11 may also include annulus 114 and connecting plate 115, annulus 114
One end is connect with monitoring case 111, and the other end of annulus 114 is connect with connecting plate 115, is provided with through-hole on connecting plate 115
The other end of 115a, through-hole 115a connection annulus 114 and connecting tube 112.The axis of through-hole 115a and annulus 114
Angle between axis is α, wherein 0 ° < α < 180 °.This set enters seal chamber 13 from monitoring case 111 in monitoring oil 14
When, monitoring oil 14 can flow through annulus 114, the through-hole 115a in connecting plate 115 and connecting tube 112 and then enter sealing
In chamber 13, monitoring oil 14 has enough bufferings before entering connecting tube 112 and seal chamber 13, reduce connecting tube 112 with it is close
The hydraulic shock that envelope chamber 13 will receive.
Optionally, the axis of annulus 114 can be parallel with gravity direction, and through-hole 115a can be with the axis of annulus 114
Line is vertical.The hydraulic shock that this set can largely reduce connecting tube 112 and seal chamber 13 will receive.
Further, settable part crooked pipeline in connecting tube 112, can further decrease that seal chamber 13 is subject to is slow
Punching.
Optionally, connecting hole 115b is provided on connecting plate 115, exhaust pipe 113 is plugged in connecting hole 115b, exhaust pipe
113, which pass through annulus 114, protrudes into monitoring case 111.Exhaust pipe 113 passes through the connecting hole 115b on connecting plate 115 and passes through
It is entered back into monitoring case 111 after annulus 114, exhaust pipe 113 can be guaranteed exhaust by the excellent support of connecting plate 115
The use of pipe 113 is stablized.
Illustratively, sealing ring pipe 115c is provided on connecting plate 115, sealing ring pipe 115c and through-hole 115a connect
Logical, connecting tube 112 is coaxially set on sealing ring shape pipe 115c.Sealing ring pipe 115c setting can increase connecting tube 112 with
Leakproofness between connecting plate 115.
As shown in figure 3, immersed pump sealing monitoring device 1 further includes dust cap 116, dust cap 116 is arranged in monitoring case 111
Opening 111a on.The setting of dust cap 116 can avoid the impurity such as dust and enter in monitoring case 111, guarantee the steady of monitoring case 111
It is fixed to use.
Illustratively, transparent material production can be used in monitoring case 111.It is directly observed in monitoring case 111 convenient for staff
The fluid change of monitoring oil 14.
Optionally, transparent liquidometer 117 is provided in monitoring case 111.It is directly observed in monitoring case 111 convenient for staff
The fluid change of monitoring oil 14.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of immersed pump seals monitoring device, immersed pump sealing monitoring device (1) is suitable for including at least pump main body
(101) with the immersed pump (10) of impeller (102), pass through connecting shaft between the impeller (102) and the pump main body (101)
(103) it connects, which is characterized in that immersed pump sealing monitoring device (1) includes sealing monitoring assembly (11) and auxiliary seal
Monitoring assembly (12),
The auxiliary seal monitoring assembly (12) is arranged on the pump main body (101), the auxiliary seal monitoring assembly (12)
Sealing connects between the pump main body (101), between the auxiliary seal monitoring assembly (12) and the connecting shaft (103)
It connects, seal chamber (13) is formed between the auxiliary seal monitoring assembly (12) and the connecting shaft (103),
The sealing monitoring assembly (11) includes monitoring case (111), connecting tube (112) and exhaust pipe (113), the monitoring case
(111) opening is provided on, one end of the connecting tube (112) is connected to the monitoring case (111), the connecting tube (112)
The other end is connected to the seal chamber (13), and one end of the exhaust pipe (113) is connected to the seal chamber (13), the exhaust pipe
(113) the other end is connected to atmosphere.
2. immersed pump according to claim 1 seals monitoring device (1), which is characterized in that the exhaust pipe (113) it is another
One end setting is in the monitoring case (111).
3. immersed pump according to claim 2 seals monitoring device (1), which is characterized in that the sealing monitoring assembly
It (11) further include annulus (114) and connecting plate (115), one end and the monitoring case (111) of the annulus (114)
Connection, the other end of the annulus (114) connect with the connecting plate (115), are provided on the connecting plate (115) logical
Hole (115a), the through-hole (115a) are connected to the other end of the annulus (114) and the connecting tube (112),
Angle between the axis of the through-hole (115a) and the axis of the annulus (114) is α, wherein 0 ° < α < 180 °.
4. immersed pump according to claim 3 seals monitoring device (1), which is characterized in that set on the connecting plate (115)
It is equipped with connecting hole (115b), the exhaust pipe (113) is plugged in the connecting hole (115b), and the exhaust pipe (113) passes through
The annulus (114) is protruded into the monitoring case (111).
5. immersed pump according to claim 3 seals monitoring device (1), which is characterized in that set on the connecting plate (115)
It is equipped with sealing ring pipe (115c), the sealing ring pipe (115c) is connected to the through-hole (115a), the connecting tube (112)
It is coaxially set on the sealing ring pipe (115c).
6. described in any item immersed pump sealings monitoring device (1) according to claim 1~5, which is characterized in that the immersed pump
Sealing monitoring device (1) further includes dust cap (116), and dust cap (116) setting is over said opening.
7. described in any item immersed pump sealings monitoring device (1) according to claim 1~5, which is characterized in that the monitoring case
(111) transparent liquidometer (117) are provided on.
8. described in any item immersed pump sealings monitoring device (1) according to claim 1~5, which is characterized in that the auxiliary is close
Envelope monitoring assembly (12) includes sealing plate (121) and sealing bucket (122), and the sealing plate (121) is arranged in the pump main body
(101) on the one end of the impeller (102), the sealing bucket (122) is connected with the sealing plate (121), the connection
Axis (103) runs through the sealing plate (121) and the sealing bucket (122), the sealing plate (121) and the pump main body (101)
Between, be tightly connected between the sealing plate (121) and the connecting shaft (103), the seal chamber (13) is formed in described
Between pump main body (101), the sealing bucket (122), the sealing plate (121) and the connecting shaft (103).
9. immersed pump according to claim 8 seals monitoring device (1), which is characterized in that the connecting shaft (103) and institute
It states and is provided with sealing element (124) between sealing bucket (122).
10. immersed pump according to claim 9 seals monitoring device (1), which is characterized in that the sealing element (124) is adopted
It is made of resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811237651.7A CN109441846B (en) | 2018-10-23 | 2018-10-23 | Sealing monitoring device for immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811237651.7A CN109441846B (en) | 2018-10-23 | 2018-10-23 | Sealing monitoring device for immersed pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109441846A true CN109441846A (en) | 2019-03-08 |
| CN109441846B CN109441846B (en) | 2020-09-08 |
Family
ID=65547599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811237651.7A Active CN109441846B (en) | 2018-10-23 | 2018-10-23 | Sealing monitoring device for immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109441846B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594143A (en) * | 2019-07-29 | 2019-12-20 | 武汉船用机械有限责任公司 | Test run device of submersible pump head |
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| US4373868A (en) * | 1976-07-06 | 1983-02-15 | Varian Associates, Inc. | Diffusion pump for leak detector |
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| CN105485038A (en) * | 2015-11-30 | 2016-04-13 | 武汉船用机械有限责任公司 | Double-end surface mechanical seal monitoring device of fluid centrifugal pump |
| CN205262678U (en) * | 2015-12-31 | 2016-05-25 | 毕瑞亮 | Leak testing appearance |
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|---|---|---|---|---|
| AT111565B (en) * | 1923-09-26 | 1928-12-10 | Gray Processes Corp | Process for purifying hydrocarbons. |
| US4373868A (en) * | 1976-07-06 | 1983-02-15 | Varian Associates, Inc. | Diffusion pump for leak detector |
| CN201351629Y (en) * | 2008-09-26 | 2009-11-25 | 四川省自贡工业泵有限责任公司 | Monitoring control device of leakage liquid of submerged pump |
| CN102226484A (en) * | 2011-04-11 | 2011-10-26 | 江苏大学 | On-line monitoring device for seal leakage at valve stem of nuclear-grade valve |
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|---|---|
| CN109441846B (en) | 2020-09-08 |
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