CN104214345A - Multi-level sealing device - Google Patents
Multi-level sealing device Download PDFInfo
- Publication number
- CN104214345A CN104214345A CN201410276396.2A CN201410276396A CN104214345A CN 104214345 A CN104214345 A CN 104214345A CN 201410276396 A CN201410276396 A CN 201410276396A CN 104214345 A CN104214345 A CN 104214345A
- Authority
- CN
- China
- Prior art keywords
- sealing
- seal chamber
- sealed device
- way valve
- seal
- 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.)
- Pending
Links
Abstract
The invention discloses a multi-level sealing device and relates to the technical field of equipment sealing. The multi-level sealing device comprises three sealing structures, wherein a first sealing structure is arranged at one side near a sealing cavity flange, and comprises a helical wheel, a gas valve, a gas-pressure meter and a first one-way valve; a second sealing structure is arranged at one side far away from the sealing cavity flange, and comprises multiple pieces of packing, a gland and a gland adjustment unit; a third sealing structure is arranged between the first sealing structure and the second sealing structure, and comprises a second one-way valve and a flow uniform distribution sleeve. According to the multi-level sealing device, through the installation of the sealing structures of three levels, the sealing problem of large equipment of which the diameter is greater than 300mm is effectively solved, and meanwhile, the sealing operation of the equipment under a non-disassembly state can be realized; the first sealing structure and the third sealing structures are both injection-type flexible liquid sealing structures, and the second sealing structure is a packing-type sealing structure; the sealing structures of the multi-level sealing device disclosed by the invention are split, so that the sealing structures can be conveniently disassembled for maintenance.
Description
Technical field
The present invention relates to equipment technical field of sealing technology, particularly relate to one and comprise hydraulic seal and the multi-stage sealed device of gland sealed.
Background technique
Although the packing seal history of existing more than 1000 year but so far still in application on a lot of equipment, as reciprocal axle wellhead sealing equipment, reciprocating pump shaft seal, the large gauge circumferential sealing more than more than 300 millimeters.Mechanical seal major part instead of first generation packing seal, as pump sealing, still rotation axis seal etc., but still can not use mechanical seal for the sealing of the diameter of axle more than more than 300 millimeters, because all seal rings, no matter be compacting or sintering, there is no so large manufacturing equipment.
At present, mechanical seal also has a lot of deficiency, as: 1, the life-span of sealing does not catch up with the cycle needs of chemical industry general overhaul in 1 year; 2, sealing is once leak and must shut down stopping production, tears open greatly and unloads greatly, make maintenance expenses high, cause stopping production economic loss serious; 3, because mechanical seal part accuracy of manufacturing is very high, not only manufacture processing difficulties, difficulty is installed but also maintains also difficult especially; 4, second generation mechanical seal manufactures specification maximum diameter and is no more than 300 millimeters.
The utility model patent that the patent No. is 201220324320.9, invention and created name is " hydraulic seal device " discloses and is a kind ofly applicable to the technological scheme that diameter is no more than the hydraulic seal device of 300 millimeters, discloses a kind of pouring-in hydraulic seal device in this technological scheme.But the inapplicable diameter of technological scheme of this patent is more than the sealing of the equipment of more than 300 millimeters.
Meanwhile, due to the progress and development of science and technology, to the requirement of equipment sealing more and more to large-diameter, the long lifetime, few dismounting, few stop production to seek development, existing like this packing seal, mechanical seal and hydraulic seal are just not suitable with this demand.
Summary of the invention
In order to solve the problems of the technologies described above, the object of this invention is to provide a kind of multi-stage sealed device, this multi-stage sealed device effectively enhances sealing effect by three grades of sealing configurations; And by two pouring-in liquid sealing structures can ensure or else detaching equipment when realize seal operation.
The object of the invention is to be achieved through the following technical solutions:
A kind of multi-stage sealed device, comprises seal chamber, and described seal chamber is one with the tubular body of through hole, and seal chamber one end is provided with mounting flange, and described seal chamber is provided with three sealing configurations:
The side near seal chamber flange is located at by first sealing configuration, comprising:
One helical wheel, is located in seal chamber through hole, and described helical wheel is tubulose, and helical wheel one end outer surface is adjacent is provided with left-handed and screw section that is dextrorotation, is provided with first ring connected in star between described left-handed thread portion and the screw section of dextrorotation;
One gas valve, be located at the top of described first ring connected in star, and extend seal chamber, the hollow hole of described gas valve is corresponding with first ring connected in star, be provided with the plunger that can slide up and down in hollow hole, gas valve and seal chamber joint are provided with O RunddichtringO;
One barometer, is connected with gas valve;
First one-way valve, be located at the top of described first ring connected in star, and extend seal chamber, the first described one-way valve is corresponding with first ring connected in star by first passage, the first described one-way valve top is provided with the first filling gun joint, and the first described filling gun joint is connected with the first outside filling gun.
The side away from seal chamber flange is located at by second sealing configuration, comprising:
Multiple packing filling, is located at the space of helical wheel and seal chamber inwall;
Gland, one end and multiple packing filling adjoin;
Gland regulation unit, is located at the side end of seal chamber away from flange, and described gland regulation unit and gland adjoin;
3rd sealing configuration is located between the first sealing configuration and the second sealing configuration, comprising:
Second one-way valve, be located at the top of described multiple packing fillings, and extend seal chamber, the bottom of the second one-way valve is connected with multiple packing filling by second channel, the second described one-way valve top is provided with the second filling gun joint, and the second described filling gun joint is connected with the second outside filling gun.
Seal chamber adopts many lobes split-type structural.
By the technological scheme of the invention described above, multi-stage sealed device of the present invention makes sealing effect better by the design of three grades of sealing configurations.Wherein two-stage is sealed into hydraulic seal, mechanical seal easily damaged parts is become sealing fluid, sealing once lose efficacy and tear open no longer greatly and unload greatly replacing obturator, external rapid pipe joint need be connected with injection gun when driving, only, beat with injection gun several under, decanting point sealing fluid, a few minutes can seal by Yan immediately again.Seal chamber adopts many lobes split type simultaneously, is convenient to dismounting, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is a kind of mode of execution cross-sectional view of multi-stage sealed device of the present invention;
Fig. 2 is the first sealing configuration cross-sectional view of the present invention;
Fig. 3 is seal chamber structural representation of the present invention;
Fig. 3 a is seal chamber cross-sectional view of the present invention;
Fig. 3 b is the main TV structure schematic diagram of seal chamber flange of the present invention one side;
Fig. 4 is helical wheel structural representation of the present invention;
Fig. 5 is gland regulation unit structural representation of the present invention;
Fig. 6 is the uniform nested structure schematic diagram of overcurrent of the present invention;
Fig. 7 is Snap ring structure schematic diagram of the present invention;
Fig. 7 a is the main TV structure schematic diagram of snap ring of the present invention;
Fig. 7 b is snap ring cross-sectional view of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail:
As shown in Figure 1, Figure 2 with shown in Fig. 3 (comprising Fig. 3 a and Fig. 3 b), a kind of multi-stage sealed device, comprise seal chamber 100, described seal chamber 100 is one with the tubular body of through hole, seal chamber 100 one end is provided with mounting flange 101, and this multi-stage sealed device is by mounting flange 101 equipment needing sealing mounted externally.Mounting flange 101 is provided with multiple mounting hole 102, and is fixedly connected with external equipment by bolt 60.In order to ensure the installation sealing effect with external equipment, one end of described seal chamber flange 101 is provided with O-ring seal 50.Meanwhile, be provided with end cover 70 in one end of described seal chamber flange 101, realize the effective sealing to seal chamber 100 and external equipment.
Described seal chamber 100 is provided with three sealing configurations:
The side near seal chamber flange 101 is located at by first sealing configuration, comprising:
One helical wheel 11, as shown in Figure 4, helical wheel 11 is located in seal chamber 100 through hole, described helical wheel 11 is tubulose, the adjacent screw section 112 being provided with left-handed thread portion 111 and dextrorotation of helical wheel 11 one end outer surface, be provided with first ring connected in star 113 between described left-handed thread portion 111 and the screw section 112 of dextrorotation, helical wheel 11 is also provided with helical wheel mounting hole 114, by helical wheel mounting hole 114, helical wheel 11 is fixed on seal chamber 100.
One gas valve 12, as shown in Figure 1, Figure 2 with shown in Fig. 3 a, the top of described first ring connected in star 113 is located at by described gas valve 12, and extend seal chamber 100, and gas valve 12 is located in the gas valve mounting hole 12 ' on seal chamber 100.The hollow hole of described gas valve 12 is corresponding with first ring connected in star 113, namely the air outlet of hollow hole corresponds to first ring connected in star 113, be provided with the plunger 122 that can slide up and down in hollow hole, gas valve 12 and seal chamber 100 joint are provided with O RunddichtringO 123.
One barometer, is connected with gas valve 12.Barometer display is by the air pressure of gas valve 12.
First one-way valve 13, as shown in Figure 1, Figure 2 with shown in Fig. 3 a, the top of described first ring connected in star 113 is located at by the first described one-way valve 13, and extend seal chamber 100, and the first one-way valve 13 is located in the first one-way valve mounting hole 13 ' on seal chamber 100.The first described one-way valve 13 is corresponding with first ring connected in star 113 by first passage 132, and namely the liquid outlet of first passage 132 is corresponding with first ring connected in star 113.The first described one-way valve 13 top is provided with the first filling gun joint 131, and the first described filling gun joint 131 is connected with the first outside filling gun.
As shown in Figure 1, the side away from seal chamber flange 101 is located at by the second sealing configuration, comprising:
Multiple packing filling 21, is located at the space of helical wheel 11 and seal chamber 100 inwall, and namely multiple packing filling is filled in the space that the outside of helical wheel 11 and seal chamber 100 inwall form.Described multiple packing fillings 21 preferably two, three, four, five or six.Packing filling is also named sealing, is usually woven by more soft thread and forms, be that foursquare bar is filled in seal chamber 100, thus realize sealing by sectional area.Packing seal is in leakage way, stop liquid to flow leakage with fiber plug such as linen-cottons the earliest, the main shaft seal being used as water lifting machinery.Present packing is widely used in the to-and-fro motion shaft seal of the rotating shaft sealing of centrifugal pump, compressor, vacuum pump, stirrer and propeller for vessels, reciprocating pump, reciprocal compressor, the cool machine of system, and the turn sealing etc. of various valve rod.
Gland 22, gland 22 one end and multiple packing filling 21 adjoin.Gland 22 is used for compressing multiple packing filling 21.
Gland regulation unit 23, as shown in Figure 1 and Figure 5, gland regulation unit 23 is located at the side end of seal chamber 100 away from flange 101, and described gland regulation unit 23 adjoins with gland 22, gland regulation unit 23 can fastening gland 22, and then realizes compressing multiple packing filling 21.Described gland regulation unit 23 is connected with seal chamber 100 by screw thread.Described gland regulation unit 23 is connected preferably by the outside thread 7 of internal thread 231 with seal chamber 100 end.
As shown in Fig. 1 and Fig. 3 a, the 3rd sealing configuration is located between the first sealing configuration and the second sealing configuration, comprising:
Second one-way valve 31, is located at the top of described multiple packing fillings 21, and extends seal chamber 100, and the second one-way valve 31 is located in the second one-way valve mounting hole 31 ' on seal chamber 100.The bottom of the second one-way valve 31 is connected with multiple packing filling 21 by second channel, and the sealing fluid namely in the second one-way valve 31 can flow in multiple packing filling 21, and then realizes hydraulic seal.The second described one-way valve 31 top is provided with the second filling gun joint, and the second described filling gun joint is connected with the second outside filling gun.
Flow in each packing filling uniformly to make sealing fluid, as shown in figures 1 to 6, the 3rd described sealing configuration also comprises the uniform cover 32 of an overcurrent, the uniform cover of described overcurrent 32 is located between multiple packing filling 21, the uniform cover 32 of overcurrent is provided with the second annular groove 321, second annular groove 321 and is communicated with packing filling 21 by multiple aperture 322.Multiple aperture 322 is distributed on the both sides of the second annular groove 321, and meanwhile, in the bottom of the second annular groove 321, correspondence is provided with outwards recessed groove, is also evenly provided with multiple aperture 322 in the both sides of outwards recessed groove.Sealing fluid to both sides flowing by aperture 322, and then realizes sealing fluid and is uniformly distributed.
As shown in Figure 3 b, described seal chamber 100 is split-type structural, and namely seal chamber 100 comprises multiple valvular structure.Described multiple valvular structures preferably include two to ten two lobes.
In order to be connected by the seal chamber 100 of many valvular structures, as shown in Fig. 1 and Fig. 7 (comprising Fig. 7 a and Fig. 7 b), described multi-stage sealed device also comprises split type dismountable snap ring 40, and it is outside that described snap ring 40 is located at seal chamber 100.Described each split snap ring is provided with snap ring mounting hole 41, and position corresponding on adjacent each split snap ring is provided with recessed snap ring attachment face 42, screws in snap ring mounting hole 41 realize fixing each split snap ring by bolt.
First sealing configuration is flexible liquid sealing, its sealing principle is: (as indicated with 2, two ends multi-head spiral extrudes the flexible liquid seal ring 9 formed) that realize sealing by a flexible liquid seal ring carrying from the axial pressure that two positive and negative direction high-speed screw bodies produce.
The pressure adjusting of the packing filling of the second sealing configuration is realized by rotary gland regulation unit.
The uniform cover of overcurrent of the 3rd sealing configuration ensures that flexible sealing liquid is infused in the parts of circumference uniform distribution.
Working procedure and principle:
1, first gland regulation unit 23 is carried on the back tightly before fluid injection.
2, before driving first, second sealing fluid injection gun hose coupling exposed joint with seal chamber 100 two respectively or one-way valve is connected, sealing fluid to be injected respectively in packing filling chamber and in hydraulic seal end first ring connected in star 113, see that pressure gauge reaches 0.5 kilogram of pressure and, can be considered as sealing fluid and fill.
3, after driving left-right rotary helical wheel 11 produce have both sides under the effect of the axial force of centre, to make to form one sectional area in groove be that meson seals by oval flexible liquid seal ring 9.
4, after stopping the axial force of bidirectional screw wheel 11 disappear, now when the liquid level of liquid sealing ring 9 declines, gas valve 12 opens automatically, under the effect of 2 kilograms of gas pressures, sealing fluid to both sides dispersion, have certain viscosity and intensity to be sealed in the gap of right-hand member rapidly due to sealing fluid, (general device once to shut down in just equipment deposit meson deadweight pour in down a chimney pressure, this pressure is generally all no more than two kilograms) prevention meson is to external leakage (parking sealer).
5, when helical wheel 11 formed be first seal failure or have micro-leakage phenomenon time the second sealing configuration (packing seal) and the 3rd sealing configuration (sealing fluid in packing seal) be second seal, play safety effect.
6, when slightly micro-leakages of second sealing, under not outage state, connect the second filling gun joint injection sealing fluid again and just can seal again by Yan immediately.
7, operate that 4 or five years rear screws wheel 11 also can not wear and tear, (at least ten years life-spans) just packing filling 21 likely hardening inefficacy need to change, when changing packing filling 21, must stop, but the time is very short, as long as because the seal chamber snap ring 40 of many lobes is unclamped, seal chamber 100 opens just replaceable new packing filling 21, and then seal chamber 100 attached together work of can driving.
The large diameter mechanical sealing effect that cannot manufacture of technological scheme of the present invention particularly for more than 300 millimeters is very good, split pouring-in flexible liquid scheme for sealing is adapted to the large-diameter such as the large-scale coal pulverizer sealing of various pump, reactor, stirrer, particularly power plant, dismounting can be exempted from, few stop production or do not stop production, the multiple leakage efficiency of Yan is high, the life-span long, maintenance and recondition expense is low, reduce to stop and lose.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (10)
1. a multi-stage sealed device, comprises seal chamber, and described seal chamber is one with the tubular body of through hole, and seal chamber one end is provided with mounting flange, it is characterized in that, described seal chamber is provided with three sealing configurations:
The side near seal chamber flange is located at by first sealing configuration, comprising:
One helical wheel, is located in seal chamber through hole, and described helical wheel is tubulose, and helical wheel one end outer surface is adjacent is provided with left-handed and screw section that is dextrorotation, is provided with first ring connected in star between described left-handed thread portion and the screw section of dextrorotation;
One gas valve, be located at the top of described first ring connected in star, and extend seal chamber, the hollow hole of described gas valve is corresponding with first ring connected in star, be provided with the plunger that can slide up and down in hollow hole, gas valve and seal chamber joint are provided with O RunddichtringO;
One barometer, is connected with gas valve;
First one-way valve, be located at the top of described first ring connected in star, and extend seal chamber, the first described one-way valve is corresponding with first ring connected in star by first passage, the first described one-way valve top is provided with the first filling gun joint, and the first described filling gun joint is connected with the first outside filling gun.
The side away from seal chamber flange is located at by second sealing configuration, comprises;
Multiple packing filling, is located at the space of helical wheel and seal chamber inwall;
Gland, one end and multiple packing filling adjoin;
Gland regulation unit, is located at the side end of seal chamber away from flange, and described gland regulation unit and gland adjoin;
3rd sealing configuration is located between the first sealing configuration and the second sealing configuration, comprising:
Second one-way valve, be located at the top of described multiple packing fillings, and extend seal chamber, the bottom of the second one-way valve is connected with multiple packing filling by second channel, the second described one-way valve top is provided with the second filling gun joint, and the second described filling gun joint is connected with the second outside filling gun.
2. multi-stage sealed device according to claim 1, is characterized in that, described gland regulation unit is connected with seal chamber by screw thread.
3. multi-stage sealed device according to claim 2, is characterized in that, described gland regulation unit is connected with seal chamber by internal thread.
4. multi-stage sealed device according to claim 1, is characterized in that, described multiple packing fillings comprise two, three, four, five or six.
5. multi-stage sealed device according to claim 1, it is characterized in that, the 3rd described sealing configuration also comprises the uniform cover of an overcurrent, described overcurrent is uniform to be sheathed between multiple packing filling, uniform the putting of overcurrent is provided with the second annular groove, and the second annular groove is communicated with packing filling by multiple aperture.
6. multi-stage sealed device according to claim 1, is characterized in that, described seal chamber is split-type structural, and namely seal chamber comprises multiple valvular structure.
7. multi-stage sealed device according to claim 6, is characterized in that, multiple valvular structure comprises two to ten two lobes.
8. multi-stage sealed device according to claim 7, is characterized in that, also comprise split type dismountable snap ring, described snap ring is located at seal chamber outside.
9. multi-stage sealed device according to claim 1, is characterized in that, one end of described seal chamber flange is provided with O-ring seal.
10. multi-stage sealed device according to claim 1, is characterized in that, one end of described seal chamber flange is provided with end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410276396.2A CN104214345A (en) | 2014-06-20 | 2014-06-20 | Multi-level sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410276396.2A CN104214345A (en) | 2014-06-20 | 2014-06-20 | Multi-level sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104214345A true CN104214345A (en) | 2014-12-17 |
Family
ID=52096121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410276396.2A Pending CN104214345A (en) | 2014-06-20 | 2014-06-20 | Multi-level sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104214345A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118648A (en) * | 2015-09-29 | 2015-12-02 | 国网河南省电力公司南阳供电公司 | Insulation protection device of non-oil-charge electric system transformer |
| CN105186339A (en) * | 2015-08-29 | 2015-12-23 | 国网河南省电力公司南阳供电公司 | Insulation protection device for unfilled transformer |
| CN107631029A (en) * | 2017-10-23 | 2018-01-26 | 广州凯里莱电气机械有限公司 | A kind of secondary liquid packing sealing structure applied to absorption tower side stir device |
| CN108119354A (en) * | 2018-02-26 | 2018-06-05 | 克拉玛依胜利高原机械有限公司 | Glue injection type plunger pump gland packing box |
| CN109139427A (en) * | 2018-07-25 | 2019-01-04 | 安徽华尔泰化工股份有限公司 | A kind of stuffing box compressor cylinder base easy to disassemble |
| CN110397787A (en) * | 2019-06-21 | 2019-11-01 | 中国计量大学上虞高等研究院有限公司 | The pipeline throttling shock resistance poppet valve device of bidirectional rotation dynamic pressure sealing |
| CN111051704A (en) * | 2017-08-29 | 2020-04-21 | 株式会社荏原制作所 | Sealing system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1502525A (en) * | 1921-05-24 | 1924-07-22 | Ramsay David Mcnab | Steam condenser |
| JPH07127748A (en) * | 1993-11-01 | 1995-05-16 | Teijin Chem Ltd | Shaft sealing method for rotary valve |
| CN201779263U (en) * | 2010-09-07 | 2011-03-30 | 中国铝业股份有限公司 | Filling material sealing device of rotating shaft |
| CN102588602A (en) * | 2012-02-01 | 2012-07-18 | 海申机电总厂(象山) | Composite sealing device for centrifugal machine bearing |
| CN202732978U (en) * | 2012-07-06 | 2013-02-13 | 马卫东 | Liquid sealing device |
| CN204164363U (en) * | 2014-06-20 | 2015-02-18 | 辽阳泵业密封有限公司 | Multistage split type seal arrangement |
-
2014
- 2014-06-20 CN CN201410276396.2A patent/CN104214345A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1502525A (en) * | 1921-05-24 | 1924-07-22 | Ramsay David Mcnab | Steam condenser |
| JPH07127748A (en) * | 1993-11-01 | 1995-05-16 | Teijin Chem Ltd | Shaft sealing method for rotary valve |
| CN201779263U (en) * | 2010-09-07 | 2011-03-30 | 中国铝业股份有限公司 | Filling material sealing device of rotating shaft |
| CN102588602A (en) * | 2012-02-01 | 2012-07-18 | 海申机电总厂(象山) | Composite sealing device for centrifugal machine bearing |
| CN202732978U (en) * | 2012-07-06 | 2013-02-13 | 马卫东 | Liquid sealing device |
| CN204164363U (en) * | 2014-06-20 | 2015-02-18 | 辽阳泵业密封有限公司 | Multistage split type seal arrangement |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186339A (en) * | 2015-08-29 | 2015-12-23 | 国网河南省电力公司南阳供电公司 | Insulation protection device for unfilled transformer |
| CN105186339B (en) * | 2015-08-29 | 2017-09-15 | 国网河南省电力公司南阳供电公司 | A kind of insulation protection device of non-filling transformer |
| CN105118648A (en) * | 2015-09-29 | 2015-12-02 | 国网河南省电力公司南阳供电公司 | Insulation protection device of non-oil-charge electric system transformer |
| CN111051704A (en) * | 2017-08-29 | 2020-04-21 | 株式会社荏原制作所 | Sealing system |
| CN107631029A (en) * | 2017-10-23 | 2018-01-26 | 广州凯里莱电气机械有限公司 | A kind of secondary liquid packing sealing structure applied to absorption tower side stir device |
| CN108119354A (en) * | 2018-02-26 | 2018-06-05 | 克拉玛依胜利高原机械有限公司 | Glue injection type plunger pump gland packing box |
| CN109139427A (en) * | 2018-07-25 | 2019-01-04 | 安徽华尔泰化工股份有限公司 | A kind of stuffing box compressor cylinder base easy to disassemble |
| CN110397787A (en) * | 2019-06-21 | 2019-11-01 | 中国计量大学上虞高等研究院有限公司 | The pipeline throttling shock resistance poppet valve device of bidirectional rotation dynamic pressure sealing |
| CN110397787B (en) * | 2019-06-21 | 2020-09-25 | 中国计量大学上虞高等研究院有限公司 | Bidirectional rotary dynamic pressure sealed pipeline throttling impact-resistant poppet valve device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104214345A (en) | Multi-level sealing device | |
| US20230138582A1 (en) | Cover, fluid end and plunger pump | |
| CN204164363U (en) | Multistage split type seal arrangement | |
| CN205956387U (en) | Two -stage combination formula rotary shaft seal device | |
| CN202158190U (en) | Gland type filling dynamic sealing device | |
| CN103062419A (en) | Steel forged refrigeration valve | |
| CN204921459U (en) | Sealing device of centrifugal pump | |
| CN203730772U (en) | Fluid-pressure rotating shaft packing seal device | |
| CN203847748U (en) | Cam bending valve | |
| CN204213037U (en) | A kind of corrosion-resistant integrated mechanical sealing device for pump | |
| CN206824049U (en) | self-rotating nozzle | |
| CN203516123U (en) | Electric speed regulation no-leakage barrel plugging pump | |
| CN106150422A (en) | A kind of oil field pump sump well mouth sealing device | |
| CN207961827U (en) | Pipe jointer sealing ring | |
| CN107355543B (en) | External flushing built-in bearing cartridge type mechanical seal | |
| CN106287093B (en) | Hydraulic turbine vibrationproof balance pipe | |
| CN204592366U (en) | Angle stroke angle valve | |
| CN204099623U (en) | Hard-hearted sealed valve core made by oneself by the conical surface | |
| CN210153265U (en) | Pneumatic two-piece type high-platform ball valve | |
| CN102359445B (en) | Screw pump ground driving device with three-end-face mechanical seal | |
| CN206268444U (en) | For the stationary ring radial direction adjustment mechanism on mechanically-sealing apparatus | |
| CN105508611A (en) | Stuffing sealing structure and plunger pump with same | |
| CN202251057U (en) | Novel stuffing sealing device | |
| CN206093336U (en) | Hydraulic turbine antivibration voltage -sharing pipe | |
| CN209704522U (en) | It is a kind of not shut down the polished rod sealer for installing airtight and watertight padding additional |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20170510 |
|
| AD01 | Patent right deemed abandoned |