CN108005977A - A kind of hydraulic buttery valve with temperature-monitoring function - Google Patents

A kind of hydraulic buttery valve with temperature-monitoring function Download PDF

Info

Publication number
CN108005977A
CN108005977A CN201711090593.5A CN201711090593A CN108005977A CN 108005977 A CN108005977 A CN 108005977A CN 201711090593 A CN201711090593 A CN 201711090593A CN 108005977 A CN108005977 A CN 108005977A
Authority
CN
China
Prior art keywords
temperature
hole
sealing ring
monitoring function
housing
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
Application number
CN201711090593.5A
Other languages
Chinese (zh)
Other versions
CN108005977B (en
Inventor
于延宾
张宁宁
杨海莉
寇岩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jincheng Nanjing Electromechanical Hydraulic Pressure Engineering Research Center Aviation Industry Corp of China
AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Original Assignee
AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems filed Critical AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Priority to CN201711090593.5A priority Critical patent/CN108005977B/en
Publication of CN108005977A publication Critical patent/CN108005977A/en
Application granted granted Critical
Publication of CN108005977B publication Critical patent/CN108005977B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005Fault detection or monitoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

The present invention relates to a kind of hydraulic buttery valve with temperature-monitoring function, including pilot valve, electromagnet assembly, temperature sensor, the second sealing ring and housing;Housing has pilot valve installation cavity, sensor installation cavity, fuel feed hole, load holes and oil return hole, and fuel feed hole and sensor installation cavity are linked up.A kind of hydraulic buttery valve with temperature-monitoring function of the present invention, temperature sensor is integrated on coil former, on the one hand oil liquid temperature can be monitored, on the other hand setup error between coil former and housing can be prevented, pilot valve and coil block are connected by the hydraulic buttery valve by welding, and reduce product weight;The valve body and housing of product, the sealing between sensor and housing do not use O-ring seal and use sealing ring made of Torlon, greatly reduce small product size and weight, increase slide cartridge structure between armature and coil block, greatly reduce the stuck probability of product, improve Product Safety.

Description

A kind of hydraulic buttery valve with temperature-monitoring function
Technical field
The invention belongs to technical field of hydraulic pressure, is related to a kind of hydraulic buttery valve with temperature-monitoring function.
Background technology
General hydraulic buttery valve is made of electromagnet assembly, pilot valve component, housing etc., is sealed, caused using O-ring Small product size is big, weight is big, it is necessary to more installation spaces;Traditional hydraulic buttery valve only controls hydraulic oil in hydraulic system The break-make on road, is not monitored oil liquid temperature, when system needs to monitor oil liquid temperature, it is necessary in addition arrange temperature sensor, The volume of system is caused to become larger.
The content of the invention
The purpose of the present invention is:A kind of high reliability, band temperature-monitoring function, small hydraulic buttery valve are provided.
The present invention technical solution be:A kind of hydraulic buttery valve with temperature-monitoring function, including pilot valve, electromagnetism Iron component, temperature sensor 13, the second sealing ring 14 and housing 15;Housing 15 have pilot valve installation cavity, sensor installation cavity, Fuel feed hole, load holes and oil return hole, fuel feed hole and sensor installation cavity are linked up;
Pilot valve includes the first sealing ring 1, net-filter assembly 2, guider 3, steel ball 4, push rod 5, valve body 6, the first sealing 1 endoporus of ring is in flared trumpet shape for taper, and valve body 6 is T-type structure, and valve body 6 includes seal section and construction section, seal section and sealing The part of 1 inner hole of ring is taper, and valve body 6 is equipped with directed cavity and pushrod chamber vertically, is equipped between directed cavity and load negative Hydraulic fluid port is carried, load hydraulic fluid port is connected with housing load holes, and oil return opening, oil return opening and housing oil return hole are equipped between pushrod chamber and oil return Connection, directed cavity are located at taper contraction side, are respectively used to installation and guide device 3 and push rod 5, have between directed cavity and pushrod chamber Aperture connects;There is stepped hole on the outside of directed cavity, net-filter assembly 2 is installed, there is fuel feed hole and pilot hole in guider 3, Both connect, and steel ball 4 is provided with pilot hole, and the inner side of push rod 5, which is equipped with, may pass through aperture between directed cavity and pushrod chamber, promote The protrusion of steel ball 4;
Electromagnet assembly includes coil former 10, coil 7, slide cartridge 8, armature 9, spring 11, sleeve 12, the coil Skeleton component 10 has an endoporus, a stepped hole, a threaded hole and a wire casing, and slide cartridge 8 is mounted in coil former 10 Endoporus in, armature 9 be installed on slide cartridge 8 in, 8 one side opening of slide cartridge, opposite side has end face, and the armature 9 can be in slide cartridge 8 Interior reciprocating motion, and it is spacing by end face, and slide cartridge 8 can move back and forth in coil former 10;Coil former 10 Stepped hole be used for that the construction section of valve body 6 is installed, be fixed with one by welding, coil 7 is installed on coil former 10 In wire casing, there is the outside of coil former 10 sleeve 12, sleeve 12 and coil former 10 to be fixed with one by welding;
Temperature sensor 13 has construction section, seal section and thermometric section, the threaded hole cooperation of construction section and coil block, sealing Section and the part of 14 inner hole of the second sealing ring are taper, and thermometric section is installed on temperature sensor installation cavity;Coil rack group Part 10 is installed on housing by screw.
Above-mentioned first sealing ring 1,14 hole taper of the second sealing ring are 5 °~8 °.
Above-mentioned 6 seal section of valve body, the taper of 13 seal section of temperature sensor are 5 °~8 °.
Above-mentioned first sealing ring, 1 both ends outer surface is equipped with annular groove, for discharging extrusion stress.
The outer surface in above-mentioned first sealing ring, 1 vertical oil return hole and fuel feed hole direction is equipped with rectangular channel at two, symmetrical For for stress release.
Above-mentioned 6 seal section of valve body is equipped with anti-torsion groove with construction section junction, parallel axial with seal section in kidney-shaped.
Above-mentioned anti-torsion groove is 3, is circumferentially uniformly distributed.
The above-mentioned protrusion of push rod 5 is taper, and taper is 15 °~25 °.
Above-mentioned seal ring material is Torlon.
There are 4 rectangular channels at above-mentioned second sealing ring 14, outer surface middle part, are uniformly distributed, for stress release.
Above-mentioned armature 9,8 outer surface circumference of slide cartridge have axially through oil groove.
Above-mentioned oil groove is two, symmetrical.
Oil groove is equipped with the outside of above-mentioned 8 end face of slide cartridge, oil groove depth 0.3mm, wide 1.5mm, quantity is 4, uniformly distributed.
It is the center hole that 118 ° of outside diameters are φ 8 that above-mentioned 10 end of coil former, which is equipped with angle,.
Beneficial effects of the present invention:A kind of hydraulic buttery valve band temperature sensor with temperature-monitoring function, the temperature pass 13 one side of sensor can monitor oil temperature, on the other hand can prevent setup error between coil former 10 and housing 15; The pilot valve and coil former 10 of the hydraulic buttery valve are connected by welding, and reduce product weight;6 He of valve body of product Sealing between housing 15, temperature sensor 13 and housing 6 does not use O-ring seal and uses sealing ring, greatly reduces Small product size and weight, increase slide cartridge 8, greatly reduce the stuck probability of product between armature 9 and coil former 10, improve Product Safety.
Brief description of the drawings
Fig. 1 is the hydraulic buttery valve structure diagram with temperature-monitoring function of the invention, 1:First sealing ring, 2:Strainer group Part, 3:Guider, 4:Steel ball, 5:Push rod, 6:Valve body, 7:Coil, 8:Slide cartridge, 9:Armature, 10:Coil former, 11:Bullet Spring, 12:Sleeve, 13:Temperature sensor, 14:Second sealing ring, 15:Housing.
Embodiment
Below by specific embodiment, the present invention is described further:
A kind of hydraulic buttery valve with temperature-monitoring function, including pilot valve, electromagnet assembly, temperature sensor 13, Two sealing rings 14 and housing 15;Housing 15 has pilot valve installation cavity, sensor installation cavity, fuel feed hole, load holes and oil return hole, Fuel feed hole and sensor installation cavity are linked up;
Pilot valve includes the first sealing ring 1, net-filter assembly 2, guider 3, steel ball 4, push rod 5, valve body 6, the first sealing 1 endoporus of ring is in flared trumpet shape for taper, and valve body 6 is T-type structure, and valve body 6 includes seal section and construction section, seal section and sealing The part of 1 inner hole of ring is taper;Valve body 6, which prolongs, is axially arranged with directed cavity and pushrod chamber, is equipped between directed cavity and load negative Hydraulic fluid port is carried, load hydraulic fluid port is connected with housing load holes, and oil return opening, oil return opening and housing oil return hole are equipped between pushrod chamber and oil return Connection, directed cavity are located at taper contraction side, are respectively used to installation and guide device 3 and push rod 5, have between directed cavity and pushrod chamber Aperture connects;There is stepped hole on the outside of directed cavity, net-filter assembly 2 is installed, there is fuel feed hole and pilot hole in guider 3, Both connect, and steel ball 4 is provided with pilot hole, and the inner side of push rod 5, which is equipped with, may pass through aperture between directed cavity and pushrod chamber, promote The protrusion of steel ball 4, as shown in Figure 1;
Above-mentioned first sealing ring 1,14 hole taper of the second sealing ring are 5 °~8 °, can guarantee that valve body 6, temperature sensor 13 There is good leakproofness between housing.
Above-mentioned 6 seal section of valve body, the taper of 13 seal section of temperature sensor are 5 °~8 °, can guarantee that valve body 6, temperature sensing There is good leakproofness between device 13 and housing.
Above-mentioned first sealing ring, 1 both ends outer surface is equipped with annular groove, for ensureing that it is close that sealing ring 1 and valve body 6 extrude Transmission, balanced internal stress are without being torn during envelope.
The outer surface in above-mentioned first sealing ring, 1 vertical oil return hole and fuel feed hole direction is equipped with rectangular channel at two, symmetrical, It is distributed to for the stress equilibrium when sealing ring 1 is in extruding in the middle part of material.
Above-mentioned 6 seal section of valve body is equipped with anti-torsion groove with construction section junction, parallel axial with seal section in kidney-shaped, assembling When sealing ring 1 is sticked into the anti-torsion groove of valve body 6 with frock, can prevent sealing ring 1 from being reversed around the seal section of valve body 6.
The above-mentioned protrusion of push rod 5 is taper, and taper is 15 °~25 °, between directed cavity and the pushrod chamber for reducing valve body 6 Aperture diameter, while can ensure the raised root structure intensity of push rod 5.
Above-mentioned seal ring material is Torlon, not only can guarantee that sealing effect but also can guarantee that structural strength, while can reduce Product weight.
Electromagnet assembly includes coil former 10, coil 7, slide cartridge 8, armature 9, spring 11, sleeve 12, the coil Skeleton component 10 has an endoporus, a stepped hole, a threaded hole and a wire casing, and slide cartridge 8 is mounted in coil former 10 Endoporus in, armature 9 be installed on slide cartridge 8 in, 8 one side opening of slide cartridge, opposite side has end face, and the armature 9 can be in slide cartridge 8 Interior reciprocating motion, and it is spacing by end face, and slide cartridge 8 can move back and forth in coil former 10;Coil former 10 Stepped hole be used for that the construction section of valve body 6 is installed, be fixed with one by welding, coil 7 is installed on coil former 10 In wire casing, there is the outside of coil former 10 sleeve 12, sleeve 12 and coil former 10 to be fixed with one by welding; The stepped hole of coil former 10 is used to install valve body 6, both are connected by welding, and welding structure can reduce product weight.
Above-mentioned electromagnet assembly will increase slide cartridge 8 between coil former 10 and armature 9, by a traditional sliding pair Be changed into two sliding pairs, when armature 9 it is stuck in slide cartridge 5 when, slide cartridge 8 can be still slided in the coil former 10, work as cunning When cylinder 8 is stuck in coil former 10, armature 9 is still able to slide in slide cartridge 8.This is greatly lowered armature 9 and exists The stuck probability of coil former 10, improves the reliability of product;Armature 9,8 outer surface circumference of slide cartridge be equipped with axially through Oil groove, armature 9, the fluid or air at 8 both ends of slide cartridge can be linked up, ensure they move back and forth freely;Coil rack group 10 end set center hole of part, understands to set center hole not influence output of products power by simulation analysis, and can reduce product weight Amount;Coil former 10 is installed on housing 15 by screw.
Temperature sensor 13 has construction section, seal section and thermometric section, the threaded hole cooperation of construction section and coil block, sealing The part of section and 14 inner hole of the second sealing ring is taper, temperature sensor 13 and housing 15 by extruding the second sealing ring 14 Sealed, ensure that fluid does not leak outside, thermometric section is installed on temperature sensor installation cavity.
There are 4 rectangular channels at above-mentioned second sealing ring 14, outer surface middle part, are uniformly distributed, for discharging portion extrusion stress.
Temperature sensor 13 is integrated in the work(that 10 one side of coil former adds product surveillance oil temperature by the present invention Can, while it is also prevented from setup error between coil rack 10 and housing 15.
Sealed between valve body 6 and housing 15 in the present invention by crush seal ring 1, temperature sensor 13 and housing 15 it Between sealed by crush seal ring I14, the oil inlet of valve body 6, load port, oil return opening are not required additional seal circle to carry out Sealing, considerably reduces the radial and axial size of valve body 6 and the radial dimension of temperature sensor 13, significantly reduces production The weight of product.

Claims (10)

  1. A kind of 1. hydraulic buttery valve with temperature-monitoring function, it is characterised in that:Passed including pilot valve, electromagnet assembly, temperature Sensor (13), the second sealing ring (14) and housing (15);Housing (15) has pilot valve installation cavity, sensor installation cavity, oil inlet Hole, load holes and oil return hole, fuel feed hole and sensor installation cavity are linked up;
    Pilot valve includes the first sealing ring (1), net-filter assembly (2), guider (3), steel ball (4), push rod (5), valve body (6), First sealing ring (1) endoporus is in flared trumpet shape for taper, and valve body (6) is T-type structure, and valve body (6) includes seal section and installation Section, the part of seal section and sealing ring (1) inner hole is taper, and valve body (6), which prolongs, is axially arranged with directed cavity and pushrod chamber, is oriented to Load hydraulic fluid port is equipped between chamber and load, load hydraulic fluid port is connected with housing load holes, and oil return opening is equipped between pushrod chamber and oil return, Oil return opening is connected with housing oil return hole, and directed cavity is located at taper contraction side, is respectively used to installation and guide device (3) and push rod (5), There is aperture connection between directed cavity and pushrod chamber;There is stepped hole on the outside of directed cavity, net-filter assembly (2) is installed, be oriented to dress Putting has fuel feed hole and pilot hole in (3), both connect, and steel ball 4 is provided with pilot hole, is equipped with and may pass through on the inside of push rod (5) Aperture between directed cavity and pushrod chamber, promotes the protrusion of steel ball 4;
    Electromagnet assembly includes coil former 10, coil 7, slide cartridge 8, armature 9, spring 11, sleeve 12, the coil rack Component (10) has an endoporus, a stepped hole, a threaded hole and a wire casing, and slide cartridge (8) is mounted in coil former (10) in endoporus, armature (9) is installed in slide cartridge (8), and 8 one side opening of slide cartridge, opposite side has end face, and the armature 9 can To be moved back and forth in slide cartridge 8, and it is spacing by end face, and slide cartridge 8 can move back and forth in coil former 10;Coil bone The stepped hole of frame component (10) is used for installing the construction section of valve body (6), is fixed with one by welding, and coil (7) installation is online In the wire casing of ring framework component (10), there is sleeve (12), sleeve (12) and coil rack group outside coil former (10) Part (10) is fixed with one by welding;
    Temperature sensor (13) has construction section, seal section and thermometric section, the threaded hole cooperation of construction section and coil block, seal section Part with the second sealing ring (14) inner hole is taper, and thermometric section is installed on temperature sensor installation cavity;Coil rack group Part (10) is installed on housing by screw.
  2. 2. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:First sealing ring (1), Second sealing ring (14) hole taper is 5 °~8 °.
  3. 3. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:Valve body (6) seal section, The taper of temperature sensor (13) seal section is 5 °~8 °.
  4. 4. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:First sealing ring (1) Both ends outer surface is equipped with annular groove.
  5. 5. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:First sealing ring (1) The outer surface in vertical oil return hole and fuel feed hole direction is equipped with rectangular channel at two.
  6. 6. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:Valve body (6) seal section Anti- torsion groove is equipped with construction section junction, it is parallel axial with seal section in kidney-shaped.
  7. 7. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:Push rod (5) protrusion is Taper, taper are 15 °~25 °.
  8. 8. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:Seal ring material is Torlon。
  9. 9. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:Second sealing ring (14) There are 4 rectangular channels in the middle part of outer surface, be uniformly distributed.
  10. 10. the hydraulic buttery valve according to claim 1 with temperature-monitoring function, it is characterised in that:Armature (9), slide cartridge (8) outer surface circumference have axially through oil groove.
CN201711090593.5A 2017-11-08 2017-11-08 Hydraulic electromagnetic valve with temperature monitoring function Active CN108005977B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711090593.5A CN108005977B (en) 2017-11-08 2017-11-08 Hydraulic electromagnetic valve with temperature monitoring function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711090593.5A CN108005977B (en) 2017-11-08 2017-11-08 Hydraulic electromagnetic valve with temperature monitoring function

Publications (2)

Publication Number Publication Date
CN108005977A true CN108005977A (en) 2018-05-08
CN108005977B CN108005977B (en) 2020-08-18

Family

ID=62052238

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711090593.5A Active CN108005977B (en) 2017-11-08 2017-11-08 Hydraulic electromagnetic valve with temperature monitoring function

Country Status (1)

Country Link
CN (1) CN108005977B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111894930A (en) * 2020-08-13 2020-11-06 北京鸣天液压技术有限公司 Electromagnetic bypass valve and using method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3535759B2 (en) * 1999-02-05 2004-06-07 コベルコ建機株式会社 Hydraulic valve control device
JP3772982B2 (en) * 2003-02-28 2006-05-10 住友建機製造株式会社 Construction machine remote control valve hydraulic circuit
CN200946693Y (en) * 2006-09-19 2007-09-12 宝山钢铁股份有限公司 Hydraulic guide control water valve
CN200999772Y (en) * 2007-04-30 2008-01-02 江苏鼎晟液压有限公司 Double-beat drop valve
CN103075522A (en) * 2013-01-11 2013-05-01 新乡平原航空液压设备有限公司 Drainage stop valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3535759B2 (en) * 1999-02-05 2004-06-07 コベルコ建機株式会社 Hydraulic valve control device
JP3772982B2 (en) * 2003-02-28 2006-05-10 住友建機製造株式会社 Construction machine remote control valve hydraulic circuit
CN200946693Y (en) * 2006-09-19 2007-09-12 宝山钢铁股份有限公司 Hydraulic guide control water valve
CN200999772Y (en) * 2007-04-30 2008-01-02 江苏鼎晟液压有限公司 Double-beat drop valve
CN103075522A (en) * 2013-01-11 2013-05-01 新乡平原航空液压设备有限公司 Drainage stop valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111894930A (en) * 2020-08-13 2020-11-06 北京鸣天液压技术有限公司 Electromagnetic bypass valve and using method thereof
CN111894930B (en) * 2020-08-13 2021-03-16 北京鸣天液压技术有限公司 Electromagnetic bypass valve and using method thereof

Also Published As

Publication number Publication date
CN108005977B (en) 2020-08-18

Similar Documents

Publication Publication Date Title
CN105223122B (en) A kind of bolt-type core holding unit
CN104089824B (en) The pressure resistant testing device of major diameter Welding Structure metallic conduit
CN103603842B (en) A kind of compound start cylinder for vibration test and loading method thereof
CN108005977A (en) A kind of hydraulic buttery valve with temperature-monitoring function
CN102003430A (en) Hydraulic cylinder
CN109083767B (en) Water pressure testing device for thin-wall shell of solid rocket engine jet pipe
US3057374A (en) Relief valve assembly
CN106369200A (en) Gas spring overflow valve
CN104565358A (en) Hydraulic cylinder
CN104963910A (en) Differential pressure adjusting cylinder for mechanical seal
CN106461114A (en) Valve device for controlling media flows of any type
CN201874919U (en) Hydraulic cylinder
CN204729385U (en) The differential voltage regulation cylinder of mechanical seal
CN104455818A (en) Composite transitional joint throttling device
RU146153U1 (en) WATER COOLED CYLINDER (OPTIONS)
CN205478142U (en) Improvement structure of hydraulic pressure manual pump
CN208125204U (en) A kind of nuclear power flow measurement device of single measurement pipe
CN207599062U (en) Safety valve with emulsion recycling function
CN108005978A (en) A kind of pilot valve
CN202266786U (en) Rotating joint with heat dissipation structure
CN105508611A (en) Stuffing sealing structure and plunger pump with same
CN105041760A (en) High-pressure thin-wall large-diameter extrusion oil tank
CN105719705A (en) Outlet connection pipe in pressurized water reactor integral hydraulic simulation test
CN111350714A (en) Fluid acting device
CN203822742U (en) Hollow hydraulic cylinder with built-in sensor

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
GR01 Patent grant
GR01 Patent grant