CN206571509U - The nitrogen safety valve of quick note inflated with nitrogen - Google Patents
The nitrogen safety valve of quick note inflated with nitrogen Download PDFInfo
- Publication number
- CN206571509U CN206571509U CN201720174645.6U CN201720174645U CN206571509U CN 206571509 U CN206571509 U CN 206571509U CN 201720174645 U CN201720174645 U CN 201720174645U CN 206571509 U CN206571509 U CN 206571509U
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- base
- valve
- pressure section
- push rod
- 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.)
- Active
Links
Landscapes
- Safety Valves (AREA)
Abstract
The nitrogen safety valve that the utility model quickly notes inflated with nitrogen is related to the nitrogen safety valve technical field used in liquefied gas, oil field and colliery.Its purpose is to provide a kind of can fast and effectively note the nitrogen safety valve of inflated with nitrogen, performance stabilization, good sealing effect, quick note inflated with nitrogen simple in construction.The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, including valve body, valve element, base, valve body includes hydraulic pressure section and air pressure section, base is tightened in the air pressure section of valve body, valve element cut-off hydraulic pressure section and air pressure section, offer to offer on liquid pass hole, valve element in valve body and offer leakage fluid dram on outage, valve body；Base is provided with push rod, and push rod one end is fixed on base, the other end extends to valve element, is arranged with push rod in spring, base and is connected with portable plate and jump ring, and portable plate is connected on push rod, and spring one end is connected on portable plate, the other end is connected on push rod；Nitrogen charging mouthful is offered on base, nitrogen charging mouthful is coaxially disposed with push rod.
Description
Technical field
The utility model is related to the nitrogen safety valve technical field used in liquefied gas, oil field and colliery, particularly relates to
And a kind of nitrogen safety valve of quick note inflated with nitrogen.
Background technology
As liquefied gas, oilfield exploitation and colliery are excavated, hydraulic support is implemented and developed on a large scale, hydraulic pressure is set
Standby requirement is also increasingly stricter, thus has further requirement to the safety valve of protection equipment, especially to safety valve
Service life and reliability have higher requirement, by taking coal mine hydraulic supporting as an example, when the pressure at the top of hydraulic support is made
Into it is passive when, can safety valve in the case where bearing high pressure, and substantially stabilized off-load in time, directly affects hydraulic pressure in the short time
The service life of support and supporting safety.
Nitrogen safety valve is a kind of valve member of protection hydraulic support, the unfailing performance and service life direct relation of safety valve
Security and life-span to support.Safety valve is when receiving the pressure at the top of hydraulic support, particularly in the case of high pressure
Sufficient off-load it can directly influence hydraulic support safety in utilization in a short time.In the case of long-time high pressure,
Hydraulic support easily produces noise and vibrations or even damages seal.Other Hydraulic Elements on hydraulic support can be damaged when serious
So as to cause support apparatus to be not normally functioning.The side wall of nitrogen charging opening's edge base on existing nitrogen safety valve, base is in
The heart extends, and sealing gasket is provided with base, during filling nitrogen, the note inflated with nitrogen time is long, and the sealing gasket in pedestal is unstable, when long
Between note inflated with nitrogen in the case of high pressure, sealing gasket is easily damaged, movement is overturn, and attrition is very fast.
Utility model content
The technical problems to be solved in the utility model be to provide one kind can fast and effectively note inflated with nitrogen, performance it is stable,
The nitrogen safety valve of good sealing effect, quick note inflated with nitrogen simple in construction.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, including valve body, valve element, base, and the valve body includes liquid
Section and air pressure section are pressed, the base is tightened in the air pressure section of the valve body, and the valve element separates the hydraulic pressure section and the air pressure
Section；The base is provided with push rod and nitrogen charging mouthful, and the nitrogen charging mouthful is coaxial with the push rod, and described push rod one end is plugged on described
Nitrogen charging is intraoral, the other end extends to the valve element, is arranged with the push rod in spring, the base and is connected with portable plate and card
Spring, the jump ring is connected on the inwall of the base, and the portable plate is arranged on the jump ring close to the side of the base,
The portable plate is connected on the push rod, and the spring one end is connected on the portable plate, the other end is connected to described push away
On bar.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein offering liquid in the hydraulic pressure section of the valve body
Hole, the valve element provided with holding gas end and cross liquid end, it is described cross to offer on liquid end offer discharge opeing on outage, the valve body
Mouthful；When the hydraulic pressure section pressure is more than air pressure section pressure, the valve element is mobile to air pressure section, the outage and institute
Leakage fluid dram connection is stated, liquid outflow, the hydraulic pressure section pressure reduction, the pressure of the air pressure section promotes the valve core reset, institute
Outage is stated with the leakage fluid dram to separate.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein the outage and the leakage fluid dram are in circumference
Direction is provided with several.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein the appearance gas end of the valve element offers appearance air drain,
The appearance air drain is connected with air pressure section.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein the section of the push rod is set to decussate texture,
The push rod includes montant and cross bar, and the cross bar and the nitrogen charging mouthful are coaxial, and the montant is perpendicular to the cross bar and capping
The interface of the base and the push rod.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein the base is provided with seal plate, it is described close
The side of envelope flat board is connected on the inwall of the base, the end face of the opposite side abutting montant.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein the hydraulic pressure section of the valve body is provided with No. three sealings
Circle, the outage is provided with connecting hole, and when the hydraulic pressure section pressure is less than air pressure section, No. three sealing rings separate institute
State leakage fluid dram and the connecting hole, the hydraulic pressure section pressure increase, the valve element is mobile to air pressure section, the connecting hole with
The leakage fluid dram connection.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein being connected with sealing gasket on the valve element and No. two close
The inwall of seal, the sealing gasket and No. two sealing rings is set on the valve element, the inwall of the outer wall abutting valve body,
The sealing gasket and No. two sealing rings are arranged on the appearance gas end, and the side of the sealing gasket is close to the leakage fluid dram, another
Side laminating No. two sealing rings.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein the base is connected with the valve body screw thread, institute
State base to be tightened on the inwall of the valve body, the adapter sleeve of the base and the valve body is provided with a sealing ring.
The utility model quickly notes the nitrogen safety valve of inflated with nitrogen, wherein one end connection of the valve body away from the base
Have and back-up ring and No. four sealing rings are arranged with snap joint, the snap joint.
The nitrogen safety valve difference from prior art that the utility model quickly notes inflated with nitrogen is that the utility model is fast
Nitrogen safety valve valve body, valve element, the base of speed note inflated with nitrogen, valve body include hydraulic pressure section and air pressure section, and base is tightened in valve body
Air pressure section, valve element cut-off hydraulic pressure section and air pressure section, base provided with push rod and nitrogen charging mouthful, push rod one end be plugged on nitrogen charging it is intraoral,
The other end extends to valve element, is arranged with push rod in spring, base and is connected with portable plate and jump ring, and jump ring is connected to the interior of base
On wall, portable plate is arranged on jump ring close to the side of base, and portable plate is connected on push rod, and spring one end is connected to portable plate
The upper, other end is connected on push rod；Nitrogen charging mouthful is opened up on base, nitrogen charging mouthful is coaxially disposed with push rod, and nitrogen, which can be noted quickly, to be filled
Into air pressure section, and during nitrogen filling, the pressure perpendicular of nitrogen is acted on seal, and seal is stable to be occurred
Upset, improves the life-span of seal, wherein seal is the seal plate connected on push rod；So it is coaxially disposed with push rod
The problem of nitrogen charging mouthful solves unstable nitrogen charging time length, seal, serious wear, improves the life-span of nitrogen safety valve.
The nitrogen safety valve to quick note inflated with nitrogen of the present utility model is described further below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the structural representation for the nitrogen safety valve that the utility model quickly notes inflated with nitrogen；
Fig. 2 is the left view for nitrogen safety valve Fig. 1 that the utility model quickly notes inflated with nitrogen.
Accompanying drawing is marked：1st, snap joint；2nd, valve element；3rd, valve body；4th, No. three sealing rings；5th, sealing gasket；6th, No. two sealing rings；
7th, jump ring；8th, portable plate；9th, spring；10th, a sealing ring；11st, seal plate；12nd, push rod；13rd, base；14th, No. four sealings
Circle；15th, back-up ring；16th, montant；17th, cross bar；18th, leakage fluid dram；19th, outage；20th, annular boss；21st, air drain is held；22nd, nitrogen charging
Mouthful.
Embodiment
With reference to shown in Fig. 1 and Fig. 2, the utility model quickly notes the nitrogen safety valve of inflated with nitrogen, including valve body 3, valve element 2,
Base 13, valve body 3 includes hydraulic pressure section and air pressure section, and base 13 is tightened in the air pressure section of valve body 3, and the cut-off hydraulic pressure section of valve element 2 is gentle
Section is pressed, air pressure section is provided with storage nitrogen storehouse.Base 13 is provided with push rod 12 and nitrogen charging mouthful 22, and the one end of push rod 12 is plugged on nitrogen charging mouthful 22
The interior, other end extends to valve element 2, is arranged with push rod 12 in spring 9, base 13 and is connected with portable plate 8 and jump ring 7, and jump ring 7 blocks
On the inwall for being connected on base 13, portable plate 8 is arranged on jump ring 7 close to the side of base 13, and portable plate 8 is connected on push rod 12,
Passage is offered on portable plate 8, passage has connected the storage nitrogen storehouse of the both sides of portable plate 8, facilitated nitrogen charge and discharge；The one end of spring 9
It is connected on portable plate 8, the other end is connected on push rod 12.Nitrogen charging mouthful 22 is coaxially disposed with push rod 12, and nitrogen can be noted quickly
It is charged in air pressure section, and during nitrogen filling, the pressure perpendicular of nitrogen is acted on seal, and seal is stable to be sent out
Raw upset, improves the life-span of seal, wherein seal is the seal plate 11 connected on push rod 12.
Liquid pass hole is offered in the hydraulic pressure section of valve body 3, valve element 2 is crossed and offered on liquid end provided with holding gas end and crossing liquid end
Leakage fluid dram 18 is offered on outage 19, valve body 3；When hydraulic pressure section pressure is more than air pressure section pressure, valve element 2 is mobile to air pressure section,
Outage 19 is connected with leakage fluid dram 18, liquid outflow, and hydraulic pressure section pressure reduction, the pressure of air pressure section promotes valve element 2 to reset, discharge opeing
Hole 19 separates with leakage fluid dram 18.
The hydraulic pressure section of valve body 3 is provided with No. three sealing rings 4, and outage 19 is provided with connecting hole, and hydraulic pressure section pressure is less than air pressure
Duan Shi, No. three cut-off leakage fluid drams 18 of sealing ring 4 and connecting hole, hydraulic pressure section pressure increase, valve element 2 are mobile to air pressure section, connecting hole
Connected with leakage fluid dram 18.
Specific work process：
1st, when the air pressure in storage nitrogen storehouse of the hydraulic fluid pressure that liquid pass hole enters in valve body 3 less than air pressure section, on valve element 2
Liquid pass hole in the right end position of No. three sealing rings 4, No. three sealing rings 4 are by the discharge opeing on the leakage fluid dram 18 and valve element 2 on valve body 3
Hole 19 is mutually blocked, and the hydraulic oil in the liquid pass hole of valve body 3 is not discharged and is in closed state；Push rod 12 and bullet on base 13
Spring 9 is in stable state；
2nd, when the air pressure in the storage nitrogen storehouse that the hydraulic fluid pressure in valve body 3 exceedes air pressure section, pressure of the valve element 2 in hydraulic oil
Promote and be moved to the left under power, the gas in storage nitrogen storehouse is discharged along nitrogen charging mouthful, to keep storing up the pressure balance in nitrogen storehouse；On valve element 2
Outage 19 when moving past No. three sealing rings 4 and reaching the position of the leakage fluid dram 18 of valve body 3, the hydraulic oil in valve body 3 is by valve element 2
Outage 19 and valve body 3 on leakage fluid dram 18 discharge, i.e. valve opening；With the continuous discharge of hydraulic oil, oil pipe or oil cylinder
Interior pressure reduction, when falling below the air pressure in storage nitrogen storehouse, the pressure of nitrogen compresses spring 9, promote push rod 12 to
The direction of valve element 3 is moved, and nitrogen charging mouthfuls 22 is opened, the gas push valve element 2 that nitrogen is flowed back in storage nitrogen storehouse, storage nitrogen storehouse along nitrogen charging mouthful 22 to
Move right；
3rd, when the outage 19 on valve element 2 moves to the right side of No. three sealing rings 4, outage 19 is returned in No. three sealing rings
During the position of 4 right-hand members, No. three sealing rings 4 block the outage 19 on the leakage fluid dram 18 and valve element 2 on valve body 3, so as to prevent
Hydraulic oil in joint recovered the oil sealing state to hydraulic oil from the discharge of liquid pass hole；Pass through leakage fluid dram in hydraulic oil
Under the adjustment effect that nitrogen flows out in 18 pressure releases, storage nitrogen storehouse, store up nitrogen storehouse and oil-piping or in-oil cylinder pressure is gradually balanced, when
Pressure in storage nitrogen storehouse rises to setting pressure limit, and pressure reaches equilibrium, so that valve is closed, the portable plate 8 of push rod 12 is supported
It is connected on jump ring 7, autobalance.
When storing up the pressure change in nitrogen storehouse, the spring 9 on push rod 12 compresses, resilience drives push rod 12 to move back and forth, i.e.,
Equivalent to piston component.
The section of push rod 12 is set to decussate texture, and push rod 12 includes integrally formed montant 16 and cross bar 17, cross bar 17
Coaxial with nitrogen charging mouthful 22, montant 16 is perpendicular to cross bar 17 and the interface of capping base 13 and push rod 12.The cross bar 17 of push rod 12 connects
Spring 9 is connect, support spring 9 prevents the flexural deformation of spring 9；Montant 16 plays sealing function, the company of anti-throw-out lever 12 and base 13
Place's leakage is connect, and influences the security performance of valve.Base 13 is provided with seal plate 11, and the side of seal plate 11 is connected to bottom
Seat 13 inwall on, opposite side abut montant 16 end face.Seal plate 11 plays reinforcement junction intensity and further sealing
Effect.
The appearance gas end of valve element 2 offers appearance air drain 21, holds air drain 21 and is connected with air pressure section.Hold air drain 21 and be set to taper, hold
The setting of tank increases the space in storage nitrogen storehouse, and then increases the pressure limit of air pressure section, improves the use scope of valve, simultaneously
Improve the security performance in storage nitrogen storehouse.
It is connected with sealing gasket 5 and No. two sealing rings 6 on valve element 2, the inwall of sealing gasket 5 and No. two sealing rings 6 is set in valve
On core 2, outer wall abut the inwall of valve body 3, sealing gasket 5 and No. two sealing rings 6 are arranged on appearance gas end, and the side of sealing gasket 5 is close
Leakage fluid dram 18, opposite side No. two sealing rings 6 of laminating.Sealing gasket 5 and No. two sealing rings 6 enter to the junction of air pressure section and hydraulic pressure section
Row sealing, prevents the pressure oil of hydraulic pressure section from flowing into air pressure section and causing the pressure in pipeline or oil cylinder to reduce, is also prevented from simultaneously
The gas leakage of air pressure section, it is ensured that the service precision of valve.
Base 13 is threadedly coupled with valve body 3, and base 13 is tightened on the inwall of valve body 3, the adapter sleeve of base 13 and valve body 3
Provided with a sealing ring 10, a sealing ring 10 prevents from storing up the gas leakage in nitrogen storehouse.
Outage 19 and leakage fluid dram 18 are provided with several in a circumferential direction, and outage 19 and leakage fluid dram 18 coordinate in pairs
Use, the quantity of leakage fluid dram 18 and outage 19 is designed as needed, being uniformly distributed in circumferencial direction helps to ensure valve
The structural strength of door.
The one end of valve body 3 away from base 13 is connected with snap joint 1, and snap joint 1 is integrally formed with valve body 3.Quickly connect
First 1 is provided with annular boss, and annular boss can be quickly connected on oil pipe or oil cylinder, thus snap joint 1 can install rapidly
On oil pipe or oil cylinder, the set-up time of snap joint 1 is substantially reduced, installation effectiveness is improved.It is arranged with snap joint 1
Back-up ring 15 and No. four sealing rings 14, back-up ring 15 and sealing ring improve the sealing property of junction, prevent junction hydraulic oil from letting out
Leakage.
An above-mentioned sealing ring 10, No. two sealing rings 6, No. three sealing rings 4 and No. four sealing rings 14 are set to O-shaped sealing
Circle, O-ring seal has a wide range of application, cost is low, performance is stable.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New scope is defined, on the premise of the utility model design spirit is not departed from, and those of ordinary skill in the art are to this
Various modifications and improvement that the technical scheme of utility model is made, all should fall into the protection of the utility model claims determination
In the range of.
Claims (10)
1. a kind of nitrogen safety valve of quick note inflated with nitrogen, it is characterised in that：Including valve body (3), valve element (2), base (13), institute
Stating valve body (3) includes hydraulic pressure section and air pressure section, and the base (13) is tightened in the air pressure section of the valve body (3), the valve element (2)
Separate the hydraulic pressure section and air pressure section；The base (13) is provided with push rod (12) and nitrogen charging mouthful (22), the nitrogen charging mouthful
(22) with the push rod (12) coaxially, described push rod (12) one end is plugged in the nitrogen charging mouthful (22), the other end is to the valve
Core (2) extends, and is arranged with the push rod (12) in spring (9), the base (13) and is connected with portable plate (8) and jump ring (7),
The jump ring (7) is connected on the inwall of the base (13), and the portable plate (8) is arranged on the jump ring (7) close to described
The side of base (13), the portable plate (8) is connected on the push rod (12), and described spring (9) one end is connected to the work
Move on plate (8), the other end is connected on the push rod (12).
2. the nitrogen safety valve of quick note inflated with nitrogen according to claim 1, it is characterised in that：The liquid of the valve body (3)
Liquid pass hole is offered in pressure section, the valve element (2) is provided with holding gas end and crossing liquid end, and described cross on liquid end offers outage
(19), leakage fluid dram (18) is offered on the valve body (3)；When the hydraulic pressure section pressure is more than air pressure section pressure, the valve
Core (2) is mobile to air pressure section, and the outage (19) connects with the leakage fluid dram (18), liquid outflow, the hydraulic pressure section
Pressure is reduced, and the pressure of air pressure section promotes the valve element (2) to reset, the outage (19) and the leakage fluid dram (18) every
It is disconnected.
3. the nitrogen safety valve of quick note inflated with nitrogen according to claim 2, it is characterised in that：The outage (19) and
The leakage fluid dram (18) is provided with several in a circumferential direction.
4. the nitrogen safety valve of quick note inflated with nitrogen according to claim 2, it is characterised in that：The appearance of the valve element (2)
Gas end offers appearance air drain (21), and the appearance air drain (21) connects with air pressure section.
5. the nitrogen safety valve of quick note inflated with nitrogen according to claim 1, it is characterised in that：Section of the push rod (12)
Face is set to decussate texture, and the push rod (12) includes montant (16) and cross bar (17), the cross bar (17) and the nitrogen charging mouthful
(22) coaxially, the montant (16) connecing perpendicular to the cross bar (17) and the capping base (13) and the push rod (12)
Mouthful.
6. the nitrogen safety valve of quick note inflated with nitrogen according to claim 5, it is characterised in that：Set on the base (13)
There is a seal plate (11), the side of the seal plate (11) is connected on the inwall of the base (13), opposite side abuts institute
State the end face of montant (16).
7. the nitrogen safety valve of quick note inflated with nitrogen according to claim 2, it is characterised in that：The liquid of the valve body (3)
Section is pressed provided with No. three sealing rings (4), the outage (19) is provided with connecting hole, the hydraulic pressure section pressure is less than air pressure section
When, No. three sealing rings (4) separate the leakage fluid dram (18) and the connecting hole, the hydraulic pressure section pressure increase, the valve
Core (2) is mobile to air pressure section, and the connecting hole is connected with the leakage fluid dram (18).
8. the nitrogen safety valve of quick note inflated with nitrogen according to claim 2, it is characterised in that：Connect on the valve element (2)
It is connected to sealing gasket (5) and No. two sealing rings (6), the inwall of the sealing gasket (5) and No. two sealing rings (6) is set in described
On valve element (2), outer wall abut the inwall of the valve body (3), the sealing gasket (5) and No. two sealing rings (6) are arranged on institute
Appearance gas end is stated, the side of the sealing gasket (5) is close to the leakage fluid dram (18), opposite side laminating No. two sealing rings (6).
9. the nitrogen safety valve of quick note inflated with nitrogen according to claim 1, it is characterised in that：The base (13) and institute
Valve body (3) threaded connection is stated, the base (13) is tightened on the inwall of the valve body (3), the base (13) and the valve
The adapter sleeve of body (3) is provided with a sealing ring (10).
10. the nitrogen safety valve of quick note inflated with nitrogen according to claim 1, it is characterised in that：The valve body (3) is remote
One end of the base (13), which is connected with snap joint (1), the snap joint (1), is arranged with back-up ring (15) and No. four sealings
Enclose (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174645.6U CN206571509U (en) | 2017-02-24 | 2017-02-24 | The nitrogen safety valve of quick note inflated with nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174645.6U CN206571509U (en) | 2017-02-24 | 2017-02-24 | The nitrogen safety valve of quick note inflated with nitrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206571509U true CN206571509U (en) | 2017-10-20 |
Family
ID=60059553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720174645.6U Active CN206571509U (en) | 2017-02-24 | 2017-02-24 | The nitrogen safety valve of quick note inflated with nitrogen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206571509U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576565A (en) * | 2020-11-27 | 2021-03-30 | 北京天地玛珂电液控制系统有限公司 | Inflatable safety valve |
-
2017
- 2017-02-24 CN CN201720174645.6U patent/CN206571509U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576565A (en) * | 2020-11-27 | 2021-03-30 | 北京天地玛珂电液控制系统有限公司 | Inflatable safety valve |
| CN112576565B (en) * | 2020-11-27 | 2023-08-22 | 北京天玛智控科技股份有限公司 | Inflatable safety valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201228688Y (en) | Self locking oil cylinder | |
| CN202560256U (en) | Plug-in type stand column hydraulic control one-way valve | |
| CN204716190U (en) | Big orifice Hydraulic Double slips fracturing packer | |
| CN206571509U (en) | The nitrogen safety valve of quick note inflated with nitrogen | |
| US20140202327A1 (en) | Hydro-pneumatic tensioner with fluid retention device | |
| CN204283384U (en) | Sleeve pipe grug feeding jar | |
| CN207268306U (en) | Spring-compensating structure for pressure container flange sealing | |
| CN203742631U (en) | High-flow pressure triple-purpose valve of individual hydraulic prop | |
| CN108589800B (en) | Basic earthquake-resistant structure of building engineering | |
| CN103253309B (en) | 6 pipe hydraulic pressure aerating long tube superimposed trailers | |
| CN203905980U (en) | Shock resistant anchor rod tray | |
| CN214331055U (en) | Hydraulic cylinder unloading structure | |
| CN201901548U (en) | Sloping prevention system of arm support | |
| CN205592499U (en) | Type petroleum pipeline mount takes precautions against earthquakes | |
| CN207470852U (en) | A kind of automatic unidirectional tapping valve | |
| CN103899778A (en) | Valve body, bushing, support, partition plate and gate valve | |
| CN103591349A (en) | High-flow intelligent warning type safety valve | |
| CN102758643A (en) | Safety valve | |
| CN209636793U (en) | A kind of adjustable rise buildings stake | |
| CN201787308U (en) | Unloading valve and lubricating system using same | |
| CN207829923U (en) | A kind of safety valve | |
| CN207484732U (en) | A kind of two-way energy-consuming device of hanging | |
| CN208106459U (en) | A kind of Novel suspending hydraulic prop | |
| CN203906842U (en) | Automatically sealed high pressure valve | |
| CN202296988U (en) | Oil return device of hydraulic jack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Fang Chunmei Inventor after: Zhang Yongwei Inventor before: Liu Yahong Inventor before: Fang Chunmei Inventor before: Zhang Yongwei |
|
| CB03 | Change of inventor or designer information |