CN109140070A - It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment - Google Patents
It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment Download PDFInfo
- Publication number
- CN109140070A CN109140070A CN201811107737.8A CN201811107737A CN109140070A CN 109140070 A CN109140070 A CN 109140070A CN 201811107737 A CN201811107737 A CN 201811107737A CN 109140070 A CN109140070 A CN 109140070A
- Authority
- CN
- China
- Prior art keywords
- main body
- frequency vibration
- hydraulic pipeline
- sealing
- pipeline joint
- 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
Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
Abstract
The invention belongs to hydraulic pipeline joint fields, disclose a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment；It is provided with the first main body and the second main body；First main body and the second main body are by interference fit connection, and the first main body carries out confinement by locking nut with the second main body and connects, and locking nut offers the pin hole being connected with the first main body junction, is equipped with latch in pin hole；There are two shaft shoulder class stop positioning section the first stop positioning section and the second stop positioning sections for first main body and the setting of the second main body junction；First main body and the second main body junction are folded with axial sealing stripe and apex sealing strip.The present invention solves have biggish pressure oscillation or high-frequency vibration because of use environment from the root, cause connector leakage phenomenon, make its really can in the environment of high pressure, high-frequency vibration stability and high efficiency work, thoroughly solve existing hydraulic pipeline joint and occur leakage phenomenon in use for some time.
Description
Technical field
The invention belongs to hydraulic pipeline joints more particularly to a kind of applied to high pressure, the fluid pressure line of high-frequency vibration environment
Connector.
Background technique
Currently, the prior art commonly used in the trade is such that
Existing most common hydraulic pipeline joint mainly has following 2 kinds, A type joint: close with inserted link hole snap-gauge connecting band O shape
Seal；Type B connector: it is connect with spherical joint or with angle conic connector；Wherein A type joint at work match for gap by two parts
It closes, if use environment has biggish pressure oscillation or high-frequency vibration, irregular movement will be done using inserted link hole snap-gauge as fulcrum,
It causes the damage of O-ring seals or failure in turn result in sealability decline, in turn results in connector leakage phenomenon.Type B connector exists
Use environment has and screw thread can occur when biggish pressure oscillation or high-frequency vibration moves back button, in turn results in connector leakage phenomenon.
There is leakage phenomenon in use for some time in existing hydraulic pipeline joint, external environment dirt while leakage
The particles such as soil sundries can enter hydraulic system.This phenomenon is in mine instrument such as coalcutter, development machine, shield machine, heavy engineering
Vehicle such as large excavator, heavy forklift etc. are mechanical especially prominent in use.Caused by being leaked because of oil liquid while economic loss
It will also result in the system failure and mechanical breakdown, shorten the service life of hydraulic implement components, further increase maintenance and inspection
The cost repaired.
In conclusion problem of the existing technology is:
There is leakage phenomenon in use for some time in existing hydraulic pipeline joint, external environment dirt while leakage
The particles such as soil sundries can enter hydraulic system, cause the system failure and mechanical breakdown, and that shortens hydraulic implement components uses the longevity
Life, further increases the cost of maintenance and maintenance.
Solve the difficulty and meaning of above-mentioned technical problem:
Inserted link hole snap-gauge connecting band O-ring seals connector, since it is desired that operator is manually inserted assembly, so being gap
Cooperation, and fit clearance cannot be less than 0.1mm, otherwise can not be packed by manpower.Although there is one section of shaft shoulder class stop positioning section,
Because it is limited by installation environment, there is the gap not less than 0.1mm, there are biggish pressure oscillations or vibration in use environment, just
Irregular movement can be done using inserted link hole snap-gauge as fulcrum, the damage of O-ring seals or failure is caused in turn result under sealability
Drop, in turn results in connector leakage phenomenon.Because it is limited by assembly technology so connector leakage phenomenon can not be solved.
With spherical joint or the connector connecting with the angle conical surface, which is to lean on spiral shell after reaching pretightning force by being threadedly coupled
The self-lock ability progress of line is locking, and use environment has biggish pressure oscillation or high-frequency vibration, after the self-lock ability beyond screw thread
Screw thread will occur and move back button, in turn result in connector leakage phenomenon.Its reason is no reliable stop locking device so making
Buckle joint leakage phenomenon is moved back at screw thread.
How to increase sealing performance, solves inserted link hole snap-gauge connecting band O-ring seals connector working portion in biggish pressure
Irregular movement is done under the operating condition of fluctuation or high-frequency vibration, with spherical joint or with the locking stop of angle conical surface jointing
Technique is its difficult point place.
Leakage in industry not only reduces the efficiency of production, wastes the unnecessary energy, and bring pole to environment
Big harm.Compared with the sealing cost of cost required for pre- anti-leak, stop brought by leakage including pollution, loss, burn into
Comprehensive energy consumption including machine is lost often at 3-10 times or more, and security risk brought by leaking is then at 10-100 times or more.
With the industrial upgrading of modernization, the leakage in industrial production and construction how is reduced, is kept the safety in production with reaching, clean manufacturing,
Energy-saving purpose becomes important project.It is to be related to the common objective of entire society's environment.
Summary of the invention
In view of the problems of the existing technology, the present invention provides it is a kind of applied to high pressure, high-frequency vibration environment it is hydraulic
Pipe joint improves in conjunction with the advantages of both the above connector and shields its disadvantage, and the apex seal performance of existing A type joint also has
The good feature of the threaded connection property confined of Type B connector, while there is its axial plane sealing performance.
The invention is realized in this way a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment, the application
It is provided in the hydraulic pipeline joint of high pressure, high-frequency vibration environment
First main body and the second main body；
By 0.01mm~0.03mm interference fit connection, the first main body and the second main body are logical for first main body and the second main body
It crosses locking nut and carries out confinement connection, locking nut offers the pin hole being connected with the first main body junction, wears in pin hole
There is latch；
There are two shaft shoulder class stop positioning sections first to brake positioning section and for first main body and the setting of the second main body junction
Two braking positioning sections；
First main body and the second main body junction are folded with axial sealing stripe and apex sealing strip.
Further, it was connected to stop pin connection with the first main body after locking nut locking, and played the role of positioning and locking, avoids
Because nut moves back button phenomenon caused by pressure oscillation and high-frequency vibration.
Further, the first main body be folded with the second main body junction together with axial sealing stripe with together with apex sealing strip or
Two axial sealing stripes apex sealing strip or axial sealing stripe and two apex sealing strips or individually axial together together with together with
Sealing strip or an independent apex sealing strip, the at most optional road twice apex sealing strip N axial sealing stripe；Axial sealing stripe choosing
It selects in mounting body.
Another object of the present invention is to provide the hydraulic pipeline joints for being applied to high pressure, high-frequency vibration environment described in one kind
Application method, described applied to high pressure, the application method of hydraulic pipeline joint of high-frequency vibration environment includes: connector for joint
Using the locking processing of latch mechanical stop, it is fixed to be fixed using connection inside the braking two sections of butt joints of positioning section of shaft shoulder class
Position, the combination sealing equipped with axial sealing stripe and apex sealing strip enhance sealing performance by the sealing of plural number, main by first
Body and the second main body it is different material selection, the difference of coefficient of thermal expansion, cause braking the first positioning section and the second positioning section by mistake
Degree cooperation becomes to be interference fitted, and further enhances sealing performance；Ensure hydraulic joint by the first positioning section and the second positioning section
The first main body is resisted in the environment of high-frequency vibration and second main body two parts generate the performance of relative motion.
The hydraulic tube for being applied to high pressure, high-frequency vibration environment is installed another object of the present invention is to provide a kind of
The large excavator of pipeline connector.
The hydraulic tube for being applied to high pressure, high-frequency vibration environment is installed another object of the present invention is to provide a kind of
The heavy forklift of pipeline connector.
In conclusion advantages of the present invention and good effect are as follows:
Butt joint connector of the present invention uses the locking processing of latch mechanical stop, brakes two sections of positioning section using shaft shoulder class
Positioning is fixed in connection inside butt joint, equipped with axial, radial combination sealing, enhances leakproofness by the sealing of plural number
Can, it can also be selected by the first main body material different with the second main body, the difference of coefficient of thermal expansion causes stop first to position
Section and the interference fit interference of the second positioning section further increase, and further enhance sealing performance；Pass through the first positioning section and second
Positioning section resists the first main body and the generation of second main body two parts relatively to ensure the hydraulic joint in the environment of high-frequency vibration
The performance of movement.It avoids the first main body and second main body two parts from carrying out irregular movement under external force, causes sealing
Damage or failure in turn result in sealability decline.
The present invention solves have biggish pressure oscillation or high-frequency vibration because of use environment from the root, causes connector leakage existing
As, make its really can in the environment of high pressure, high-frequency vibration stability and high efficiency work, thoroughly solve existing hydraulic pipeline joint
Occurs leakage phenomenon in use for some time.
Effective solution of the present invention hydraulic pipeline joint oil leakage phenomenon.Its joint sealing work section uses staged three
Section form, head and the tail section are shaft shoulder class stop positioning section i.e. the first positioning section and the second positioning section, and centre is axial seal working face,
The specific setting of sealing joint strip can be according to actual condition flexible choice, that is, the first main body, which may be selected, also may be selected the second main body.The
The length of one positioning section and the second positioning section be locking nut reach 3/4, so the first positioning section of the first main body and
The first positioning section and the second positioning section of second positioning section and the second main body are that the pretightning force of attaching nut is leaned on to be pressed into.
Existing inserted link hole snap-gauge connecting band O-ring seals connector, since it is desired that operator is manually inserted assembly, so being
Clearance fit, and fit clearance cannot be less than 0.1mm, otherwise can not be packed into and compare by manpower, can not install there is no manpower
Problem.Simultaneously because of its first positioning section and the second positioning section with interference connection, and eliminates inserted link hole snap-gauge and use screw thread instead
Confine connection type, solving existing inserted link hole snap-gauge connecting band O-ring seals connector, there are biggish pressure in use environment
Fluctuation or vibration, will do irregular movement using inserted link hole snap-gauge as fulcrum, and the damage of O-ring seals or failure is caused to make in turn
At connector leakage phenomenon.
It is existing with spherical joint or the connector being connect with the angle conical surface, without or only compared together to sealing strip, increase
If the selectable multistage dense strip of paper used for sealing including minimum one of axial sealing stripe, one of apex sealing strip.Simultaneously because locking nut is locked
It is next that latch is equipped between the first main body, nut anti-looseness scheme is provided with mechanical anchor mode, solving use environment has
Biggish pressure oscillation or high-frequency vibration will occur screw thread after the self-lock ability beyond screw thread and move back button, in turn result in connector infiltration
Leak phenomenon.
Detailed description of the invention
Fig. 1 is the hydraulic pipeline joint structural representation provided in an embodiment of the present invention applied to high pressure, high-frequency vibration environment
Figure；
Fig. 2 is pin-and-hole structure schematic diagram (a) left view provided in an embodiment of the present invention；
In figure: 1, the first main body；2, the second main body；3, locking nut；4, latch；5, axial sealing stripe；6, the first system
Dynamic positioning section；7, the second braking positioning section；8, apex sealing strip；9, pin hole；(a) left view；(b) right view.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
As depicted in figs. 1 and 2, the fluid pressure line provided in an embodiment of the present invention applied to high pressure, high-frequency vibration environment connects
Head includes the first main body 1, the second main body 2, locking nut 3, latch 4, the braking positioning section 6, second of axial sealing stripe 5, first
Brake positioning section 7, apex sealing strip 8, pin hole 9.
By interference fit connection, the first main body 1 and the second main body 2 pass through locking nut for first main body 1 and the second main body 2
3 carry out confinement connection, and locking nut 3 offers the pin hole 9 being connected with 1 junction of the first main body, is equipped with stop in pin hole 9
Pin 4；
There are two shaft shoulder class braking positioning sections first to brake 6 He of positioning section for first main body 1 and the setting of 2 junction of the second main body
Second braking positioning section 7；
First main body 1 and 2 junction of the second main body are folded with axial sealing stripe 5 and apex sealing strip 8.
Preferably, locking nut 3 is connect with 1 junction of the first main body by multiple latch 4.
Preferably, the first main body 1 be folded with 2 junction of the second main body together with axial sealing stripe 5 it is radial close with together with
Strip of paper used for sealing 8 or two axial sealing stripes 5 apex sealing strip 8 or axial sealing stripe 5 and two apex sealing strips 9 or single together with together with
Only one of axial sealing stripe 5 or an independent apex sealing strip 8.
Butt joint connector of the present invention uses the locking processing of 4 mechanical stop of latch, brakes positioning section two using shaft shoulder class
Positioning is fixed in connection inside section butt joint, and the combination sealing equipped with axial sealing stripe 5 and apex sealing strip 8 passes through plural number
Sealing enhance sealing performance, selected by the different material of the first main body 1 and the second main body 2, the difference of coefficient of thermal expansion causes
It brakes the first positioning section 6 and the second positioning section 7 and becomes to be interference fitted with excessively, further enhance sealing performance；Pass through
It is main that one positioning section 6 and the second positioning section 7 resist the first main body 1 and second to ensure the hydraulic joint in the environment of high-frequency vibration
The performance of 2 two parts of body generation relative motion.The first main body 1 and 2 two parts of the second main body is avoided to carry out under external force not
Regular motion causes the damage or failure of sealing, in turn results in sealability decline.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification within mind and principle, equivalent replacement and improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment, which is characterized in that described to be applied to high pressure, height
The hydraulic pipeline joint of frequency vibration environment is provided with
First main body and the second main body；
By 0.01mm~0.03mm interference fit connection, the first main body and the second main body pass through lock for first main body and the second main body
Tight nut carries out confinement connection, and locking nut offers the pin hole being connected with the first main body junction, is equipped with only in pin hole
Dynamic pin；
There are two shaft shoulder class stop positioning sections first to brake positioning section and the second system for first main body and the setting of the second main body junction
Dynamic positioning section；
First main body and the second main body junction are folded with axial sealing stripe and apex sealing strip.
2. as described in claim 1 applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment, which is characterized in that locking
It was connected to stop pin connection with the first main body after nut check, plays the role of positioning and locking, was avoided because of pressure oscillation and high frequency vibrating
It is dynamic that nut is caused to move back button phenomenon.
3. as described in claim 1 applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment, which is characterized in that first
Main body be folded with the second main body junction together with axial sealing stripe apex sealing strip or two axial sealing stripes and one with together with
Road apex sealing strip or one of axial sealing stripe and two apex sealing strips or independent axial sealing stripe or an independent diameter together
To sealing strip, the at most optional road twice apex sealing strip N axial sealing stripe；Axial sealing stripe selects in mounting body.
4. it is a kind of as described in claim 1 applied to high pressure, the application method of the hydraulic pipeline joint of high-frequency vibration environment, it is special
Sign is that the application method applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment includes: that connector for joint uses
Positioning is fixed using connection inside the braking two sections of butt joints of positioning section of shaft shoulder class in the locking processing of latch mechanical stop, if
Have the combination sealing of axial sealing stripe and apex sealing strip, sealing performance enhanced by the sealing of plural number, by the first main body and
The different material selection of second main body, the difference of coefficient of thermal expansion cause the first positioning section of braking and the second positioning section by excessively matching
Conjunction becomes to be interference fitted, and further enhances sealing performance；Ensure hydraulic joint in height by the first positioning section and the second positioning section
The first main body is resisted in the environment of frequency vibration and second main body two parts generate the performance of relative motion.
5. a kind of be equipped with the hydraulic pipeline joint for being applied to high pressure, high-frequency vibration environment described in claims 1 to 3 any one
Large excavator.
6. a kind of be equipped with the hydraulic pipeline joint for being applied to high pressure, high-frequency vibration environment described in claims 1 to 3 any one
Heavy forklift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107737.8A CN109140070A (en) | 2018-09-21 | 2018-09-21 | It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107737.8A CN109140070A (en) | 2018-09-21 | 2018-09-21 | It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109140070A true CN109140070A (en) | 2019-01-04 |
Family
ID=64823080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811107737.8A Pending CN109140070A (en) | 2018-09-21 | 2018-09-21 | It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109140070A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2459514Y (en) * | 2001-01-17 | 2001-11-14 | 四川省应用技术开发公司 | Thin wall stainless steel high-pressure water pipe joint |
| US20070013188A1 (en) * | 2005-07-14 | 2007-01-18 | Hwces International | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
| CN200979041Y (en) * | 2006-11-29 | 2007-11-21 | 徐州矿务集团有限公司旗山煤矿 | Release-proof pneumatic tool pipe coupling |
| CN201705519U (en) * | 2010-05-27 | 2011-01-12 | 江苏安泰动力机械有限公司 | Eccentric joint for high-pressure oil pipe |
| CN102251960A (en) * | 2010-05-17 | 2011-11-23 | 泰悉尔公司 | Screw pump with field refurbishment provisions |
| CN202144922U (en) * | 2011-04-07 | 2012-02-15 | 广东联塑科技实业有限公司 | Ball joint for underground drainage pipe |
| CN106134415B (en) * | 2012-06-18 | 2014-10-22 | 上海空间推进研究所 | A kind of plunger type pipeline double containment joint for 35MPa pressure duct |
| CN105179837A (en) * | 2014-06-03 | 2015-12-23 | 机械工业股份公司 | Connection Joint For Pipes To Convey Gas, Compressed Air And Other Fluids |
| CN204986090U (en) * | 2015-10-08 | 2016-01-20 | 中国航空工业集团公司沈阳发动机设计研究所 | Pipeline connection joint |
| CN205402037U (en) * | 2015-03-16 | 2016-07-27 | 卡特彼勒公司 | Hydraulic pressure fluid pipeline system of connections and machine |
| CN106736239A (en) * | 2015-11-23 | 2017-05-31 | 北京航天试验技术研究所 | A kind of Precise Assembling Method for liquid hydrogen warm area interference fit part |
| CN206338511U (en) * | 2016-12-29 | 2017-07-18 | 福建省雾精灵环境科技有限公司 | A kind of high pressure connection and the assembling structure of pipeline |
| US20170268705A1 (en) * | 2016-03-21 | 2017-09-21 | Seungjin Ind. Co., Ltd. | Flexible joint |
-
2018
- 2018-09-21 CN CN201811107737.8A patent/CN109140070A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2459514Y (en) * | 2001-01-17 | 2001-11-14 | 四川省应用技术开发公司 | Thin wall stainless steel high-pressure water pipe joint |
| US20070013188A1 (en) * | 2005-07-14 | 2007-01-18 | Hwces International | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
| CN200979041Y (en) * | 2006-11-29 | 2007-11-21 | 徐州矿务集团有限公司旗山煤矿 | Release-proof pneumatic tool pipe coupling |
| CN102251960A (en) * | 2010-05-17 | 2011-11-23 | 泰悉尔公司 | Screw pump with field refurbishment provisions |
| CN201705519U (en) * | 2010-05-27 | 2011-01-12 | 江苏安泰动力机械有限公司 | Eccentric joint for high-pressure oil pipe |
| CN202144922U (en) * | 2011-04-07 | 2012-02-15 | 广东联塑科技实业有限公司 | Ball joint for underground drainage pipe |
| CN106134415B (en) * | 2012-06-18 | 2014-10-22 | 上海空间推进研究所 | A kind of plunger type pipeline double containment joint for 35MPa pressure duct |
| CN105179837A (en) * | 2014-06-03 | 2015-12-23 | 机械工业股份公司 | Connection Joint For Pipes To Convey Gas, Compressed Air And Other Fluids |
| CN205402037U (en) * | 2015-03-16 | 2016-07-27 | 卡特彼勒公司 | Hydraulic pressure fluid pipeline system of connections and machine |
| CN204986090U (en) * | 2015-10-08 | 2016-01-20 | 中国航空工业集团公司沈阳发动机设计研究所 | Pipeline connection joint |
| CN106736239A (en) * | 2015-11-23 | 2017-05-31 | 北京航天试验技术研究所 | A kind of Precise Assembling Method for liquid hydrogen warm area interference fit part |
| US20170268705A1 (en) * | 2016-03-21 | 2017-09-21 | Seungjin Ind. Co., Ltd. | Flexible joint |
| CN206338511U (en) * | 2016-12-29 | 2017-07-18 | 福建省雾精灵环境科技有限公司 | A kind of high pressure connection and the assembling structure of pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201351789Y (en) | Sealing plug capable of expanding at pipe opening | |
| JP5298126B2 (en) | Screw joint with pressurizable seal | |
| CN109140070A (en) | It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment | |
| CN209925622U (en) | Sealing washer and sealed frock of nodular cast-in-place pipe pressure testing | |
| CN202852326U (en) | Isolated seal fixture with pressure | |
| CN108194723A (en) | It is axially forced to formula tube joint assembly | |
| CN204604217U (en) | A kind of stopping transportation pressure changes the device of high compression diameter ball valve | |
| CN203670111U (en) | Sectional type fan blade | |
| CN201059400Y (en) | Sealing flange | |
| CN102878383A (en) | Isolating belt pressure sealing clamp | |
| CN216408008U (en) | Metal pipe connecting equipment with good sealing effect | |
| CN205298040U (en) | A a machine structure for centrifugal pump | |
| CN213655472U (en) | Telescopic sliding bearing for shield main drive and shield machine | |
| CN213869812U (en) | Skid-mounted profile control high-pressure injection pipe | |
| CN212537136U (en) | Non-water-break secondary repair construction structure for ultra-large diameter pipeline | |
| CN210940437U (en) | Long-range hose expansion device for repairing hose | |
| CN209671791U (en) | A kind of antifouling hose assembly | |
| CN109442133B (en) | Self-sealing blind plate for testing gas valve | |
| CN207568535U (en) | For sealing the polished rod sealer device of polished rod and packing | |
| CN209061382U (en) | Adsorbent equipment is used in magnetic fluid collection in drilling and repairing well operation | |
| CN203175580U (en) | Portal water stopping device for power cable tunnel pipe jacking construction out of tunnel | |
| CN219865011U (en) | Soil bin water-air channel device of large-diameter shield tunneling machine | |
| CN208107159U (en) | A kind of helical-lobe compressor sealing ring | |
| CN205978429U (en) | Shovel tight type flange anchor clamps | |
| CN206656053U (en) | A kind of flange assembly for seal for pipe joints |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190104 |