CN108488400A - Pilot-operated type pressure limiting preliminary filling valve arrangement - Google Patents
Pilot-operated type pressure limiting preliminary filling valve arrangement Download PDFInfo
- Publication number
- CN108488400A CN108488400A CN201810397983.5A CN201810397983A CN108488400A CN 108488400 A CN108488400 A CN 108488400A CN 201810397983 A CN201810397983 A CN 201810397983A CN 108488400 A CN108488400 A CN 108488400A
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- CN
- China
- Prior art keywords
- valve
- pilot
- control cylinder
- main
- spring
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 4
- 230000006378 damage Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
Classifications
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- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1223—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to a kind of pilot-operated type pressure limiting preliminary filling valve arrangements, it includes empty cup, control cylinder, main valve plug, main hydraulic fluid port, first guide rod and pilot valve valve rod baffle ring；The sky cup is fixed on the valve body where main hydraulic fluid port, and control cylinder is assemblied in empty cup, and first guide rod is assemblied in the main valve plug in control cylinder by the pilot valve valve rod baffle ring set on its outer ring and can freely activity.The present invention under smaller pressure by opening first guide rod so that the pressure reduction of pressurize chamber, and then reduce the pressure of main valve open, reduce destruction of the control oil pressure to control cylinder.
Description
Technical field
The present invention relates to a kind of Prefill valves, specifically pilot-operated type pressure limiting preliminary filling valve arrangement.
Background technology
Prefill valve is a kind of hydraulic control one-way valve of big flow, is widely used in the large hydraulic press for needing high pressure pressurize.
Because the pressurize cylinder volume of the system with pressure dwelling loop is larger, to improve working efficiency, the shorter time is needed to complete pressurize
The filling liquid task of cylinder, so that the oil realized in fuel tank quickly flows in holding tank, is designing so needing the big flow of moment
In commonly use Prefill valve and realize, meanwhile, Prefill valve also needs to good seal, in order to avoid pressure leakages when pressurize.
The dish-shaped valve that rushes in advance is most common at present, mainly by portions such as small oil tank, piston, spring, butterfly valve, control oil circuits
It is grouped as, principle is：Control oil by control oil circuit enters small oil tank so that butterfly valve open, realize big flow filling liquid with
And off-load will realize pressurize when butterfly valve is closed.Small oil tank is fixed by multiple bolts.When control oil adds
Afterwards, piston moves down, and butterfly valve is opened, and realizes the circulation of big flow.
The main valve plug of existing Prefill valve has larger area pressurize side so that dwell pressure be formed on compared with
Big pressure, thus forces control-oil pressure to greatly improve, and larger pressure could be generated on main valve plug, could open master
Spool realizes pressure release, this objectively puts forward higher requirements control oil circuit.
In practice, the failure rate of dish-shaped Prefill valve is higher, seriously affects production, and failure is mainly manifested in control cylinder
Top rupture, fixed bolt fracture, spring be stuck and spring breakage, causes to be system dwell pressure mistake the reason of these
Height controls oil and needs prodigious pressure that could open spool, excessive pressure and hydraulic shock so that control cylinder, spring,
The mechanical parts such as bolt are susceptible to failure.
Invention content
The present invention is directed to overcome the deficiencies of existing technologies, a kind of pilot-operated type pressure limiting preliminary filling valve arrangement is provided, by smaller
Pressure under open first guide rod so that the pressure reduction of pressurize chamber, and then reduce the pressure of main valve open reduces control oil pressure pair
The destruction of control cylinder.
In order to solve the above-mentioned technical problem, the invention is realized in this way：
A kind of pilot-operated type pressure limiting preliminary filling valve arrangement, it is characterised in that：It includes empty cup, control cylinder, main valve plug, main hydraulic fluid port, elder generation
Guide rod and pilot valve valve rod baffle ring；The sky cup is fixed on the valve body where main hydraulic fluid port, and control cylinder is assemblied in empty cup, first
Guide rod is assemblied in the main valve plug in control cylinder by the pilot valve valve rod baffle ring set on its outer ring and can freely activity.
The pilot-operated type pressure limiting preliminary filling valve arrangement, it is characterised in that：It further includes pilot valve valve rod spring, pilot valve
Core, poppet port, unloading port, fixing bolt, main valve plug stop collar, main valve plug spring, control cylinder spring, the oily channel of control,
The oily interface of control and pressure limiting device；
The sky cup is fixed on valve body top by fixing bolt, and control cylinder is assemblied in by control cylinder spring in empty cup,
Main valve plug in control cylinder is assemblied in by main valve plug spring in control cylinder, and main valve plug upper outside is arranged main valve plug limit
Set, main valve plug is interior to be equipped with pilot valve, and pilot valve bottom is poppet port, and first guide rod passes through the pilot valve valve set on its outer ring
Pole spacing ring and pilot valve valve rod spring are assemblied in pilot valve and can be freely movable, and main valve plug both sides are equipped with unloading port；
It is respectively equipped with main hydraulic fluid port, control oil interface and pressure limiting device on the valve body, controls oily interface and is connected by controlling oily channel
Lead to control cylinder top.
The beneficial effects of the invention are as follows：1, pilot valve is increased, and needs smaller control hydraulic pressure that can beat
Pilot valve is opened, pressure release in advance is realized, greatly reduces the pressure of main valve open, reduces the pressure to control cylinder.
2, relief valve is increased in control cylinder, adjusts hydraulic pressure appropriate, can effectively avoid hydraulic shock
Caused by control cylinder breach, protect control cylinder, to increase the service life, meanwhile, reduce fluctuation pressure, reduce bolt
Load, and then avoid the fracture and loosening of bolt.
3, using two-stage spring assembly, the i.e. resetting spring of the resetting spring and main valve of control cylinder, in this way, can make
The intensity of the resetting spring of main valve is lower, reduces the Opening pressure of main valve.
4, control cylinder use cup type piston, define the range of control cylinder spring, to protect spring not because
Over-pressed deformation and fracture ensure that the service life of Prefill valve.
5, it is also provided with limiting device on main valve, limits the range of main spool spring, protect resetting spring not because of overvoltage
And it damages.
Description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
As shown in Figure 1：A kind of pilot-operated type pressure limiting preliminary filling valve arrangement, it includes pilot valve valve rod spring 1, pilot valve 2, elder generation
Pilot valve mouth 3, main valve plug 4, pilot valve valve rod baffle ring 5, unloading port 6, main hydraulic fluid port 7, empty cup 8, fixing bolt 10, main valve plug stop collar
11, main valve plug spring 12, control cylinder spring 13, control cylinder 14, first guide rod 15, the oily channel 16 of control, control oil interface 17
With pressure limiting device 18；The sky cup is fixed on valve body top by fixing bolt, and control cylinder is assembled by control cylinder spring
In empty cup, the main valve plug in control cylinder is assemblied in by main valve plug spring in control cylinder, and main valve plug upper outside is arranged
Main valve plug stop collar, main valve plug is interior to be equipped with pilot valve, and pilot valve bottom is poppet port, and first guide rod is by being set to its outer ring
Pilot valve valve rod baffle ring and pilot valve valve rod spring be assemblied in pilot valve and can freely activity, main valve plug both sides be equipped with unload
Hydraulic fluid port；It is respectively equipped with main hydraulic fluid port, control oil interface and pressure limiting device on the valve body, controls oily interface and is connected by controlling oily channel
Lead to control cylinder top.
Working mechanism：
The filling liquid stage：
The filling liquid stage be usually oil in fuel tank by main hydraulic fluid port 7 and 4 place of main valve plug valve port enter hydraulic cylinder（In figure
Do not draw）In process, at this moment, control oil is added to the upside of control cylinder, control cylinder by interface 17, control oil duct 16
14 overcome spring force 13 to push, and main valve plug moves down, and primary valve is opened.The latus rectum of main hydraulic fluid port 7 is larger, and filling liquid speed is fast.
Packing stage：
After oil is full of, just entering packing stage, at this moment, controls oily pressure release, control cylinder 14 moves up under the action of spring 13,
Main valve plug 4 moves up under the action of spring 12, and primary valve is closed, and hydraulic cylinder dwell pressure has been also added to main valve plug 4 and elder generation simultaneously
On guide valve core 2, primary valve and poppet port are all closed, and prevent fluid from revealing.
The pressure release stage：
Pressure release is altogether guide's pressure release first, followed by primary valve pressure release, the course of work are in two stages：Control oil passes through
Interface 17 enters the upper surface of sky oil cylinder 14, and control cylinder is begun to decline, and at this moment, pushes guide's valve rod 15 to overcome spring 1 first
Power moves down, and pilot valve 2 also moves down, and poppet port 3 is opened, and at this moment high pressure oil enters main valve by poppet port 3 from downside
In core, fuel tank is returned to by unloading port 6, system pressure instantaneous pressure declines.Then control cylinder pushes main valve stem baffle ring 11, main
Spool 4 moves down opening primary valve, and a large amount of fluid enters valve body by primary valve, then returns to fuel tank by unloading port 6.
Because first realizing off-load by pilot port, because poppet port area is small, the opening pressure needed is low, meanwhile, it lets out
After pressure, the pressure of main valve open also reduces, this just substantially reduce control oil pressure, and then reduce to fixed screw,
The requirement of the mechanical strength of control cylinder, failure rate substantially reduce.
When the system is operated, caused by solenoid valve etc. acts the reasons such as sluggishness when hydraulic shock, pressure limiting device 18 is opened, and is made
It controls oil pressure to decline, when dropping to setting value, pressure limiting device 18 is closed, and stabilizes control oil pressure in this way.
Claims (2)
1. a kind of pilot-operated type pressure limiting preliminary filling valve arrangement, it is characterised in that：It include empty cup, control cylinder, main valve plug, main hydraulic fluid port,
First guide rod and pilot valve valve rod baffle ring；The sky cup is fixed on the valve body where main hydraulic fluid port, and control cylinder is assemblied in empty cup,
First guide rod is assemblied in the main valve plug in control cylinder by the pilot valve valve rod baffle ring set on its outer ring and can freely activity.
2. pilot-operated type pressure limiting preliminary filling valve arrangement according to claim 1, it is characterised in that：It further includes pilot valve valve rod bullet
Spring, pilot valve, poppet port, unloading port, fixing bolt, main valve plug stop collar, main valve plug spring, control cylinder spring, control
Liquefaction channel, the oily interface of control and pressure limiting device；
The sky cup is fixed on valve body top by fixing bolt, and control cylinder is assemblied in by control cylinder spring in empty cup,
Main valve plug in control cylinder is assemblied in by main valve plug spring in control cylinder, and main valve plug upper outside is arranged main valve plug limit
Set, main valve plug is interior to be equipped with pilot valve, and pilot valve bottom is poppet port, and first guide rod passes through the pilot valve valve set on its outer ring
Pole spacing ring and pilot valve valve rod spring are assemblied in pilot valve and can be freely movable, and main valve plug both sides are equipped with unloading port；
It is respectively equipped with main hydraulic fluid port, control oil interface and pressure limiting device on the valve body, controls oily interface and is connected by controlling oily channel
Lead to control cylinder top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397983.5A CN108488400A (en) | 2018-04-28 | 2018-04-28 | Pilot-operated type pressure limiting preliminary filling valve arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397983.5A CN108488400A (en) | 2018-04-28 | 2018-04-28 | Pilot-operated type pressure limiting preliminary filling valve arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108488400A true CN108488400A (en) | 2018-09-04 |
Family
ID=63313357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810397983.5A Pending CN108488400A (en) | 2018-04-28 | 2018-04-28 | Pilot-operated type pressure limiting preliminary filling valve arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108488400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056306A1 (en) * | 2019-09-26 | 2021-04-01 | 博世力士乐（北京）液压有限公司 | Pre-pressing valve and hydraulic reversing valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2557760Y (en) * | 2002-07-11 | 2003-06-25 | 雍歧卫 | Leading balance reverse-push discharge valve |
| CN2823710Y (en) * | 2005-10-28 | 2006-10-04 | 天津精通控制仪表技术有限公司 | Guide structure valve core |
| CN201310638Y (en) * | 2008-12-17 | 2009-09-16 | 宁波华成阀门有限公司 | Pilot-operated magnetic valve |
| CN204610412U (en) * | 2015-05-15 | 2015-09-02 | 湖州职业技术学院 | High-pressure high-flow hydraulic press pressure limiting dish-style Prefill valve |
| CN206754404U (en) * | 2016-12-26 | 2017-12-15 | 金洪水 | The core assembly of pilot-operated type self-locking stop valve |
-
2018
- 2018-04-28 CN CN201810397983.5A patent/CN108488400A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2557760Y (en) * | 2002-07-11 | 2003-06-25 | 雍歧卫 | Leading balance reverse-push discharge valve |
| CN2823710Y (en) * | 2005-10-28 | 2006-10-04 | 天津精通控制仪表技术有限公司 | Guide structure valve core |
| CN201310638Y (en) * | 2008-12-17 | 2009-09-16 | 宁波华成阀门有限公司 | Pilot-operated magnetic valve |
| CN204610412U (en) * | 2015-05-15 | 2015-09-02 | 湖州职业技术学院 | High-pressure high-flow hydraulic press pressure limiting dish-style Prefill valve |
| CN206754404U (en) * | 2016-12-26 | 2017-12-15 | 金洪水 | The core assembly of pilot-operated type self-locking stop valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056306A1 (en) * | 2019-09-26 | 2021-04-01 | 博世力士乐（北京）液压有限公司 | Pre-pressing valve and hydraulic reversing valve |
| CN114450513A (en) * | 2019-09-26 | 2022-05-06 | 博世力士乐（北京）液压有限公司 | Pre-pressure valve and hydraulic reversing valve |
| CN114450513B (en) * | 2019-09-26 | 2023-11-28 | 博世力士乐（北京）液压有限公司 | Pre-pressing valve and hydraulic reversing valve |
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| 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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180904 |