CN106286451A - Relief valve - Google Patents
Relief valve Download PDFInfo
- Publication number
- CN106286451A CN106286451A CN201610884674.1A CN201610884674A CN106286451A CN 106286451 A CN106286451 A CN 106286451A CN 201610884674 A CN201610884674 A CN 201610884674A CN 106286451 A CN106286451 A CN 106286451A
- Authority
- CN
- China
- Prior art keywords
- pressure release
- valve
- guide post
- oil
- valve body
- 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
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
Abstract
The present invention proposes a kind of relief valve, and the two ends of valve body are at the bottom of valve and valve head, is valve pocket in valve body；Set pressure release baffle plate in valve pocket and valve pocket is divided into pressure-releasing chamber and working chamber；Pressure release baffle plate sets pressure release seal groove；Being provided with the first guide post in pressure-releasing chamber, the first guide post is arranged with pressure release core, pressure release core includes pressure release guide pad, pressure release sealing member and the second guide post；Sheathed pressure release spring on first guide post；On second guide post, sheathed confession wick, includes fuel feeding guide pad and for oil seal for wick；Sheathed fuel feeding spring on second guide post；Setting entrance on valve head, entrance sets fuel feeding seal groove；Limit in working chamber a plush copper；Oil-feed port and gas outlet is offered on valve body between spacing plush copper and pressure release baffle plate；Pressure relief opening is offered on the valve body at the bottom of valve.The present invention designs simply, compact conformation, and volume is little, and technique is simple, with low cost；Both can guarantee that the stability of oil-feed port oil pump capacity, be avoided that again the oil refluence that pressure release is released, it is also possible to discharged by the bubble in oil product.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, specifically a kind of relief valve.
Background technology
Relief valve has another name called relief valve (safety valve), according to the operating pressure energy automatic open close of system, typically installs
Security of system is protected on the equipment or pipeline of closed system.When equipment or manifold pressure exceed relief valve setting pressure,
I.e. automatically turning on pressure release, it is ensured that equipment and pipeline internal medium pressure are setting under pressure, protection equipment and pipeline prevent
Unexpected.
Relief valve is an important safety block in hydraulic system, and the effect of relief valve is to ensure that oil pump capacity exists
It is held at a more stable amount under any pressure, thus ensures the properly functioning of whole system.Propose new, more effectively make
The structure of relief valve, be the continuous pursuit of this area.
Pressure-relief valve structure of the prior art is complex, and technique is loaded down with trivial details, and cost is high.
Summary of the invention
The present invention proposes a kind of relief valve, solves pressure-relief valve structure of the prior art complex, and technique is loaded down with trivial details, becomes
This high problem.
The technical scheme is that and be achieved in that:
A kind of relief valve, including valve body, the two ends of described valve body are respectively at the bottom of valve and valve head, are valve pocket in described valve body；
The middle part of described valve pocket is provided with pressure release baffle plate, and described valve pocket is divided into pressure-releasing chamber and work by described pressure release baffle plate
Chamber；
The middle part of described pressure release baffle plate is provided with through hole, and it is close that described pressure release baffle plate is provided with pressure release towards the side of described pressure-releasing chamber
Sealing groove, described pressure release seal groove was around described through hole one week；
Being provided with the first guide post in described pressure-releasing chamber, one end of described first guide post is fixed at the bottom of described valve；
Being arranged with pressure release core on described first guide post, described pressure release core includes pressure release guide pad, the pressure release being sequentially connected with
Sealing member and the second guide post；Described pressure release sealing member and described pressure release seal groove with the use of；Overlap on described first guide post
Being provided with pressure release spring, described pressure release spring is at the bottom of described valve and between pressure release guide pad；
It is arranged with on described second guide post for wick, described fuel feeding guide pad and the circular cone including for wick being sequentially connected with
The confession oil seal of shape；Being arranged with fuel feeding spring on described second guide post, described fuel feeding spring is positioned at described pressure release sealing member
And between described fuel feeding guide pad；
Described valve head is provided with entrance, described entrance be provided with described for oil seal with the use of fuel feeding seal groove；
It is provided with in described working chamber and the described displacement for wick is carried out spacing spacing plush copper；
Oil-feed port and gas outlet, described oil-feed port is offered on valve body between described spacing plush copper and described pressure release baffle plate
Connect with described working chamber with gas outlet；
Offering pressure relief opening on the valve body at the bottom of described valve, described pressure relief opening connects with described pressure-releasing chamber；
Described oil-feed port and pressure relief opening are positioned at the lower section of described valve body, and described gas outlet is positioned at the top of described valve body.
Further, it is provided with the first adjusting nut, described first adjusting nut between at the bottom of described pressure release spring and described valve
It is screwed on described first guide post.
Further, being provided with the second adjusting nut between described fuel feeding spring and described pressure release sealing member, described second adjusts
Joint nut is screwed on described second guide post.
Further, described pressure release seal groove be cross section be the groove of triangle；Described pressure release sealing member includes a disk,
Described disk is provided with the sealing bulge loop that cross section is triangle mated with described pressure release seal groove.
Further, it is provided with the first sealing material layer in described pressure release seal groove.
Further, described fuel feeding seal groove is and the described truncated cone-shaped groove mated for oil seal.
Further, it is provided with the second sealing material layer in described fuel feeding seal groove.
Further, the internal diameter of described gas outlet is gradually reduced by outside the lateral described valve body of described working chamber；Near institute
State and on the gas outlet of working chamber side, be provided with screen plate, in described gas outlet, be equipped with a ball sealer, the diameter of described ball sealer
Internal diameter more than the gas outlet outside described valve body.
The invention have the benefit that
The present invention designs simply, compact conformation, and volume is little, and technique is simple, with low cost；When oil pressure is not reaching to marginal value
Time, only fuel feeding spring stress compression, fuel feeding can be carried out by oil-feed port, when oil pressure exceedes marginal value, pressure release spring is also subject to
Force compresses, the most too much oil can be discharged from pressure relief opening, it is ensured that the stability of oil-feed port oil pump capacity；When non-draining, pressure release seals
Part and the tight pressing of pressure release seal groove, it is to avoid the oil refluence that pressure release is released；Bubble in oil can be discharged by gas outlet.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of one embodiment of the invention.
Wherein:
1, valve body；2, at the bottom of valve；3, valve head；4, pressure release baffle plate；5, pressure-releasing chamber；6, working chamber；7, pressure release seal groove；8, first
Guide post；9, pressure release guide pad；10, pressure release sealing member；11, the second guide post；12, bulge loop is sealed；13, the first encapsulant
Layer；14, pressure release spring；15, the first adjusting nut；16, fuel feeding guide pad；17, for oil seal；18, fuel feeding spring；19,
Two adjusting nuts；20, entrance；21, fuel feeding seal groove；22, the second sealing material layer；23, spacing plush copper；24, oil-feed port；25、
Pressure relief opening；26, gas outlet；27, screen plate；28, ball sealer.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, the relief valve in the present embodiment, including valve body 1, the two ends of described valve body 1 are respectively at the bottom of valve 2 and valve
3, be valve pocket in described valve body 1, valve body 1 and valve pocket are all cylinder.The middle part of described valve pocket is provided with pressure release baffle plate 4, pressure release
Baffle plate 4 is circular, and the inwall laminating of the excircle of pressure release baffle plate 4 and valve body 1, described valve pocket is divided into by described pressure release baffle plate 4
Pressure-releasing chamber 5 and working chamber 6.The middle part of described pressure release baffle plate 4 is provided with through hole, and described pressure release baffle plate 4 is towards the one of described pressure-releasing chamber 5
Side is provided with pressure release seal groove 7, and described pressure release seal groove 7 was around described through hole one week.
Being provided with the first guide post 8 in described pressure-releasing chamber 5, one end of described first guide post 8 is fixed at the bottom of described valve on 2,
First guide post 8 is positioned on the axle center of pressure-releasing chamber 5.Being arranged with pressure release core on described first guide post 8, described pressure release core includes depending on
The pressure release guide pad 9 of secondary connection, pressure release sealing member 10 and the second guide post 11；Described pressure release sealing member 10 seals with described pressure release
Groove 7 with the use of, in the present embodiment, described pressure release seal groove 7 is the groove of triangle for cross section；Described pressure release sealing member 10 wraps
Including a disk, described disk is provided with the sealing bulge loop 12 that cross section is triangle mated with described pressure release seal groove 7, described in let out
The first sealing material layer 13 it is provided with, to improve sealing in densification sealing groove 7；It is arranged with pressure release spring on described first guide post 8
14, described pressure release spring 14 is at the bottom of described valve between 2 and pressure release guide pad 9.In the present embodiment, described pressure release spring 14 and institute
Stating and be provided with the first adjusting nut 15 at the bottom of valve between 2, described first adjusting nut 15 is screwed on described first guide post 8.Can lead to
Overregulate the position of the first adjusting nut 15 to regulate the pressure of pressure release spring 14.
Second guide post 11 is positioned on the axle center of described valve pocket, described second guide post 11 is arranged with for wick, described
Include that the fuel feeding guide pad 16 being sequentially connected with supplies oil seal 17 with conical for wick；On described second guide post 11 sheathed
Having fuel feeding spring 18, described fuel feeding spring 18 is between described pressure release sealing member 10 and described fuel feeding guide pad 16.This enforcement
In example, between described fuel feeding spring 18 and described pressure release sealing member 10, it is provided with the second adjusting nut 19, described second adjusting nut
19 are screwed on described second guide post 11.The pressure of fuel feeding spring 18 can be regulated by regulating the position of the second adjusting nut 19
Power.
Described valve head 3 is provided with entrance 20, described entrance 20 be provided with described for oil seal 17 with the use of fuel feeding
Seal groove 21.In the present embodiment, described fuel feeding seal groove 21 is and the described truncated cone-shaped groove mated for oil seal 17, described
The second sealing material layer 22 it is provided with, to ensure sealing in fuel feeding seal groove 21.
It is provided with in described working chamber 6 and the described displacement for wick is carried out spacing spacing plush copper 23.In the present embodiment, limit
The quantity of position plush copper 23 is two, is relatively arranged on the inwall of valve pocket, and the gap between two spacing plush coppers 23 can allow to supply
Oil guide pad 16 passes through, but can stop for oil seal 17, to realize position-limiting action, will not stop again passing through of oil.
Oil-feed port 24 and gas outlet 26, institute is offered on valve body 1 between described spacing plush copper 23 and described pressure release baffle plate 4
State oil-feed port 24 to connect with described working chamber 6 with gas outlet 26.Pressure relief opening 25, institute is offered on the valve body 1 of 2 at the bottom of described valve
State pressure relief opening 25 to connect with described pressure-releasing chamber 5；Described oil-feed port 24 and pressure relief opening 25 are positioned at the lower section of described valve body 1, described in go out
QI KOU 26 is positioned at the top of described valve body 1.
In the present embodiment, the internal diameter of described gas outlet 26 is gradually reduced by outside the lateral described valve body 1 of described working chamber 6；
On the gas outlet 26 of described working chamber 6 side, it is provided with screen plate 27, in described gas outlet 26, is equipped with a ball sealer 28, institute
State the diameter internal diameter more than the gas outlet 26 outside described valve body 1 of ball sealer 28.The most under normal circumstances, ball sealer 28 is put
Putting on described screen plate 27, leave space between ball sealer 28 and gas outlet 26, the oil entered from entrance 20 arrives working chamber 6
Inside caching, if fruit oil internal memory is at bubble, then bubble can rise, and through screen plate 27 filter after, from ball sealer 28 with give vent to anger
Space between mouth 26 is discharged；After the gas emptying in working chamber 6, along with the rising of the liquid level of oil, ball sealer 28 can float
Rise until gas outlet 26 is sealed, then in oil is sealed in working chamber 6.
During the present embodiment work, oil enters from entrance 20, and under the effect of oil pressure, fuel feeding spring 18 is compressed, after wick
Moving, oil enters working chamber 6 from entrance 20, then carries out fuel feeding from oil-feed port 24 outflow；When the oil pressure entered from entrance 20 is excessive,
Pressure release spring 14 is compressed, and moves after pressure release core, and the most too much oil enters pressure-releasing chamber 5, then discharges from pressure relief opening 25, to ensure fuel feeding
Stablizing of mouth 24 fuel deliveries.When non-draining, pressure release sealing member 10 and the tight pressing of pressure release seal groove 7, it is to avoid pressure release is released
Oil flows backwards.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (8)
1. a relief valve, it is characterised in that include that valve body, the two ends of described valve body are respectively at the bottom of valve and valve head, described valve body
Interior is valve pocket；
The middle part of described valve pocket is provided with pressure release baffle plate, and described valve pocket is divided into pressure-releasing chamber and working chamber by described pressure release baffle plate；
The middle part of described pressure release baffle plate is provided with through hole, and described pressure release baffle plate is provided with pressure release sealing towards the side of described pressure-releasing chamber
Groove, described pressure release seal groove was around described through hole one week；
Being provided with the first guide post in described pressure-releasing chamber, one end of described first guide post is fixed at the bottom of described valve；
Being arranged with pressure release core on described first guide post, described pressure release core includes that the pressure release guide pad being sequentially connected with, pressure release seal
Part and the second guide post；Described pressure release sealing member and described pressure release seal groove with the use of；It is arranged with on described first guide post
Pressure release spring, described pressure release spring is at the bottom of described valve and between pressure release guide pad；
It is arranged with on described second guide post for wick, described fuel feeding guide pad and the cone including for wick being sequentially connected with
For oil seal；Being arranged with fuel feeding spring on described second guide post, described fuel feeding spring is positioned at described pressure release sealing member and institute
State between fuel feeding guide pad；
Described valve head is provided with entrance, described entrance be provided with described for oil seal with the use of fuel feeding seal groove；
It is provided with in described working chamber and the described displacement for wick is carried out spacing spacing plush copper；
Oil-feed port and gas outlet is offered, described oil-feed port and going out on valve body between described spacing plush copper and described pressure release baffle plate
QI KOU connects with described working chamber；
Offering pressure relief opening on the valve body at the bottom of described valve, described pressure relief opening connects with described pressure-releasing chamber；
Described oil-feed port and pressure relief opening are positioned at the lower section of described valve body, and described gas outlet is positioned at the top of described valve body.
2. relief valve as claimed in claim 1, it is characterised in that be provided with the first tune between at the bottom of described pressure release spring and described valve
Joint nut, described first adjusting nut is screwed on described first guide post.
3. relief valve as claimed in claim 2, it is characterised in that be provided with between described fuel feeding spring and described pressure release sealing member
Second adjusting nut, described second adjusting nut is screwed on described second guide post.
4. relief valve as claimed in claim 3, it is characterised in that described pressure release seal groove be cross section be the groove of triangle；
It is the close of triangle that described pressure release sealing member includes that a disk, described disk are provided with the cross section mated with described pressure release seal groove
Envelope bulge loop.
5. relief valve as claimed in claim 4, it is characterised in that be provided with the first sealing material layer in described pressure release seal groove.
6. relief valve as claimed in claim 5, it is characterised in that described fuel feeding seal groove is to mate for oil seal with described
Truncated cone-shaped groove.
7. relief valve as claimed in claim 6, it is characterised in that be provided with the second sealing material layer in described fuel feeding seal groove.
8. relief valve as claimed in claim 7, it is characterised in that the internal diameter of described gas outlet is laterally described by described working chamber
It is gradually reduced outside valve body；On the gas outlet of described working chamber side, it is provided with screen plate, in described gas outlet, is equipped with one
Ball sealer, the diameter of described ball sealer is more than the internal diameter of the gas outlet outside described valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610884674.1A CN106286451A (en) | 2016-10-10 | 2016-10-10 | Relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610884674.1A CN106286451A (en) | 2016-10-10 | 2016-10-10 | Relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106286451A true CN106286451A (en) | 2017-01-04 |
Family
ID=57716910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610884674.1A Pending CN106286451A (en) | 2016-10-10 | 2016-10-10 | Relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106286451A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747639A (en) * | 2017-11-16 | 2018-03-02 | 南通精维风电科技有限公司 | A kind of pressure relief for offshore wind generating |
| CN108870074A (en) * | 2018-06-29 | 2018-11-23 | 神华国华广投（柳州）发电有限责任公司 | A kind of air compression air accumulator with electronic automatic steam trap |
| CN109958806A (en) * | 2019-03-22 | 2019-07-02 | 桂林航天工业学院 | A kind of Pneumatic automobile pneumatic power control device |
| CN110159771A (en) * | 2018-02-13 | 2019-08-23 | 艾欧史密斯(中国)热水器有限公司 | Combine control mechanism |
| CN110778763A (en) * | 2019-10-29 | 2020-02-11 | 徐州鸿业仪器仪表有限公司 | Novel pressure stabilizing valve |
| CN112555454A (en) * | 2020-12-15 | 2021-03-26 | 浙江银轮机械股份有限公司 | Bypass valve and fluid pipeline structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4552172A (en) * | 1982-12-09 | 1985-11-12 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co. | Pressure-limiting hydraulic valve |
| DE3907152A1 (en) * | 1988-03-09 | 1989-09-21 | Zahnradfabrik Friedrichshafen | Pressure control valve |
| CN2081020U (en) * | 1990-09-18 | 1991-07-17 | 沈阳市变压器配件厂 | Pressure releasing valve |
| CN2583415Y (en) * | 2002-10-16 | 2003-10-29 | 天津特精液压股份有限公司 | Multifunctional hydraulic controlled valve for dumper |
| CN103453177A (en) * | 2013-08-13 | 2013-12-18 | 集美大学 | Dual-pipeline hydraulic safety valve |
| CN105402452A (en) * | 2015-12-11 | 2016-03-16 | 中国北方发动机研究所(天津) | Pressure relief valve |
-
2016
- 2016-10-10 CN CN201610884674.1A patent/CN106286451A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4552172A (en) * | 1982-12-09 | 1985-11-12 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co. | Pressure-limiting hydraulic valve |
| DE3907152A1 (en) * | 1988-03-09 | 1989-09-21 | Zahnradfabrik Friedrichshafen | Pressure control valve |
| CN2081020U (en) * | 1990-09-18 | 1991-07-17 | 沈阳市变压器配件厂 | Pressure releasing valve |
| CN2583415Y (en) * | 2002-10-16 | 2003-10-29 | 天津特精液压股份有限公司 | Multifunctional hydraulic controlled valve for dumper |
| CN103453177A (en) * | 2013-08-13 | 2013-12-18 | 集美大学 | Dual-pipeline hydraulic safety valve |
| CN105402452A (en) * | 2015-12-11 | 2016-03-16 | 中国北方发动机研究所(天津) | Pressure relief valve |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747639A (en) * | 2017-11-16 | 2018-03-02 | 南通精维风电科技有限公司 | A kind of pressure relief for offshore wind generating |
| CN110159771A (en) * | 2018-02-13 | 2019-08-23 | 艾欧史密斯(中国)热水器有限公司 | Combine control mechanism |
| CN110159771B (en) * | 2018-02-13 | 2024-02-27 | 艾欧史密斯(中国)热水器有限公司 | Combined control mechanism |
| CN108870074A (en) * | 2018-06-29 | 2018-11-23 | 神华国华广投（柳州）发电有限责任公司 | A kind of air compression air accumulator with electronic automatic steam trap |
| CN109958806A (en) * | 2019-03-22 | 2019-07-02 | 桂林航天工业学院 | A kind of Pneumatic automobile pneumatic power control device |
| CN109958806B (en) * | 2019-03-22 | 2020-04-10 | 桂林航天工业学院 | Pneumatic power control device for pneumatic automobile |
| CN110778763A (en) * | 2019-10-29 | 2020-02-11 | 徐州鸿业仪器仪表有限公司 | Novel pressure stabilizing valve |
| CN112555454A (en) * | 2020-12-15 | 2021-03-26 | 浙江银轮机械股份有限公司 | Bypass valve and fluid pipeline structure |
| CN112555454B (en) * | 2020-12-15 | 2023-08-11 | 浙江银轮机械股份有限公司 | Bypass valve and fluid pipeline structure |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20180814 |