CN104763822A - Load maintaining valve - Google Patents
Load maintaining valve Download PDFInfo
- Publication number
- CN104763822A CN104763822A CN201510193345.8A CN201510193345A CN104763822A CN 104763822 A CN104763822 A CN 104763822A CN 201510193345 A CN201510193345 A CN 201510193345A CN 104763822 A CN104763822 A CN 104763822A
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- CN
- China
- Prior art keywords
- cavity
- valve body
- spool
- valve
- elastic component
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- 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.)
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Classifications
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- 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
- F15B13/025—Pressure reducing valves
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- Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a load maintaining valve. The load maintaining valve solves the problems that a valve in a large mechanical device does not have the load maintaining function, and certain potential safety hazards exist in work. The load maintaining valve comprises a first valve body, a first valve element, a first elastic part, a second valve body, a second valve element and a second elastic part. A first oil inlet, a first oil outlet and a containing cavity are formed in the first valve body, the first valve element is arranged in the containing cavity and divides the containing cavity into a first oil inlet cavity, a first oil outlet cavity and a first pressure stabilizing cavity. The first elastic part has the movement trend enabling the first valve element and the first valve body to be sealed, and the first oil outlet cavity is communicated with the first pressure stabilizing cavity. The second valve body is provided with a second oil inlet, an oil drainage port and a communication cavity. The second valve element is arranged in the communication cavity, and the communication cavity is communicated with the first pressure stabilizing cavity through a communication hole. The load maintaining valve has the advantages of being simple in structure, high in safety, reliable in action, convenient to assemble, good in performance and the like.
Description
Technical field
The present invention relates to a kind of valve, be specifically related to a kind of load holding valve.
Background technique
In engineering machinery and building machinery field, have a lot of equipment such as hurry oil cylinder of the machineries such as excavator of excavator, loader, two will bear load, oil cylinder needs to possess load and keeps function.Existing valve also exists leakage problem at work, and weight is heavier, and in work, load retention is poorer.This type of big machinery action is simultaneously handled frequent, and in order to avoid system pressure loss is excessive and system heating value is excessive, therefore can not increase equilibrium valve on loop, thus avoids pressure oil output under-supply.
Summary of the invention
Keep function for the valve solved in the medium-and-large-sized machinery of background technique does not possess load, there is the problem of certain potential safety hazard in work, the invention provides a kind of load holding valve.
Technological scheme of the present invention is: a kind of load holding valve, comprise the first valve body, first spool, first elastic component, second valve body, second spool and the second elastic component, the first described valve body is provided with the first filler opening, first oil outlet and holding cavity, the first described spool to be located in holding cavity and holding cavity is separated into the first oil suction chamber, first goes out oil pocket and the first pressure stabilizing cavity, the first described spool has the primary importance that seals mutually with the first valve body and is backed down the second place making the first oil suction chamber and first go out oil pocket to be connected by hydraulic oil, the first described elastic component has the movement tendency that the first spool is sealed mutually with the first valve body, described first goes out oil pocket is connected with the first pressure stabilizing cavity, the second described valve body is provided with the second filler opening, drain tap and communicated cavity, the second described spool is located in communicated cavity, with the second valve body primary importance sealed mutually and the second place making communicated cavity be connected with drain tap when the second described spool has an installation, described communicated cavity is connected with the first pressure stabilizing cavity by intercommunicating pore.
As a modification of the present invention, push rod and the 3rd elastic component is provided with in the second described valve body, one end of described push rod is corresponding with the second spool, and the other end is corresponding with the second filler opening, and the 3rd described elastic component has the movement tendency making push rod away from the second spool.
As a further improvement on the present invention, the second described valve body is provided with swivel nut, and described swivel nut and push rod offset.
As a further improvement on the present invention, the second described spool comprise the top splenium corresponding with push rod, with the conus portion of the second valve body conical surface seal, the reset boss part offseted with the second elastic component and guide portion.
As a further improvement on the present invention, the outer surface of described first spool is provided with the sealing inclined-plane for sealing mutually with the first valve interior wall.
As a further improvement on the present invention, described first is gone out oil pocket and is connected with the first pressure stabilizing cavity by damping hole.
As a further improvement on the present invention, described intercommunicating pore is oblique to be arranged on the second valve body.
The invention has the beneficial effects as follows, provide a kind of load holding valve, when working properly, the first filler opening oil-feed, a part enters the effect that the first pressure stabilizing cavity plays load maintenance voltage stabilizing, and another part is fuel-displaced for load action from the first oil outlet; During pressure release, the second filler opening oil-feed, opens the second spool, and the hydraulic oil in the first pressure stabilizing cavity is flowed out through communicated cavity, drain tap; When the first oil-feed place does not have suddenly oil-feed, first pressure stabilizing cavity and the first elastic component make the first spool seal mutually with the first valve body, thus ensure the delivery pressure of the first oil outlet end, avoid heavy mechanical equipment when oil starvation because Action of Gravity Field falls, cause machinery and casualties.The present invention also has that structure is simple, and Security is high, reliable in action, easy to assembly, function admirable, can the advantage of adaptive main equipment operating mode.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the embodiment of the present invention.
Accompanying drawing 2 is the structure enlarged diagram of the second spool 21 in accompanying drawing 1.
Accompanying drawing 3 is the hydraulic schematic diagram of the embodiment of the present invention.
In figure, the 1, first valve body; 11, the first spool; 111, inclined-plane is sealed; 112, damping hole; 12, the first elastic component; 13, the first filler opening; 14, the first oil outlet; 15, holding cavity; 151, the first oil suction chamber; 152, first goes out oil pocket; 153, the first pressure stabilizing cavity; 2, the second valve body; 21, the second spool; 211, splenium is pushed up; 212, conus portion; 213, reset boss part; 214, guide portion; 22, the second elastic component; 23, the second filler opening; 24, drain tap; 25, communicated cavity; 26, intercommunicating pore; 27, push rod; 28, the 3rd elastic component; 29, swivel nut.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated:
By Fig. 1 composition graphs 2, shown in 3, a kind of load holding valve, comprise the first valve body 1, first spool 11, first elastic component 12, second valve body 2, second spool 21 and the second elastic component 22, the first described valve body 1 is provided with the first filler opening 13, first oil outlet 14 and holding cavity 15, the first described spool 11 to be located in holding cavity 15 and holding cavity 15 is separated into the first oil suction chamber 151, first goes out oil pocket 152 and the first pressure stabilizing cavity 153, the first described spool 11 has the primary importance that seals with the first valve body 1 phase and is backed down the second place making the first oil suction chamber 151 and first go out oil pocket 152 to be connected by hydraulic oil, the first described elastic component 12 has the movement tendency that the first spool 11 is sealed with the first valve body 1 phase, described first goes out oil pocket 152 is connected with the first pressure stabilizing cavity 153, the second described valve body 2 is provided with the second filler opening 23, drain tap 24 and communicated cavity 25, the second described spool 21 is located in communicated cavity 25, with second valve body 2 the phase primary importance sealed and the second place making communicated cavity 25 be connected with drain tap 24 when the second described spool 21 has an installation, described communicated cavity 25 is connected with the first pressure stabilizing cavity 153 by intercommunicating pore 26.Specifically, described intercommunicating pore 26 is oblique to be arranged on the second valve body 2.Be the first filler opening referring to accompanying drawing 3, A, B is the first oil outlet, and Pi is the second filler opening and control port, and T is drain tap.The invention has the beneficial effects as follows, provide a kind of load holding valve, when working properly, the first filler opening oil-feed, a part enters the effect that the first pressure stabilizing cavity plays load maintenance voltage stabilizing, and another part is fuel-displaced for load action from the first oil outlet; During pressure release, the second filler opening oil-feed, opens the second spool, and the hydraulic oil in the first pressure stabilizing cavity is flowed out through communicated cavity, drain tap; When the first oil-feed place does not have suddenly oil-feed, first pressure stabilizing cavity and the first elastic component make the first spool seal mutually with the first valve body, thus ensure the delivery pressure of the first oil outlet end, avoid heavy mechanical equipment when oil starvation because Action of Gravity Field falls, cause machinery and casualties.The present invention devises a kind of large discharge large pilot ratio hydraulic control load holding valve, and it is simple that it also has structure, and reliable in action is easy to assembly, function admirable, can the advantage of adaptive main equipment operating mode.
Push rod 27 and the 3rd elastic component 28 is provided with in the second described valve body 2, one end of described push rod 27 is corresponding with the second spool 21, the other end is corresponding with the second filler opening 23, and the 3rd described elastic component 28 has the movement tendency making push rod 27 away from the second spool 21.Specifically, the second described valve body 2 is provided with swivel nut 29, and described swivel nut 29 offsets with push rod 27.In particular, the second described spool 21 comprise the top splenium 211 corresponding with push rod 27, with the conus portion 212 of the second valve body 2 conical surface seal, the reset boss part 213 offseted with the second elastic component 22 and guide portion 214.Specifically, first, second, third elastic component is spring.The top of the swivel nut bar that bears down on one is arranged, and rotates the cracking pressure that swivel nut can set the second spool as required, makes the adaptation of product wider.The setting of swivel nut hollow at work can directly as the second filler opening simultaneously, hydraulic oil pushing tow push rod, drives push rod top to press the second spool, the first pressure stabilizing cavity is communicated with by communicated cavity with drain tap, thus make the oil in the first pressure stabilizing cavity reveal discharge.Second valve element circle tapering be arranged so that the second spool and the second valve seal are reliable, ensure product No leakage.Guide portion be arranged so that the motion of the second elastic component is more reliable.
The outer surface of described first spool 11 is provided with the sealing inclined-plane for sealing mutually with the first valve body 1 inwall.Such structure makes the first spool and the first valve body adopt conical surface seal, and sealing is reliable, avoids revealing.
Described first goes out oil pocket 152 is connected with the first pressure stabilizing cavity 153 by damping hole 112.The Reliability of Microprocessor arranging guarantee product further of damping hole, described damping hole is less than the first oil outlet.After hydraulic oil a small amount of in work enters the first pressure stabilizing cavity by damping hole, stay in the first pressure stabilizing cavity after the first pressure stabilizing cavity is full of.When the suddenly not oil-feed of the first oil inlet hole when oil inlet pipe emergency situations such as () breaking, the first spool quick closedown is made under the effect of the first spool hydraulic oil in the first elastic component and the first pressure stabilizing cavity, hydraulic oil now in the first pressure stabilizing cavity enters first by damping hole and goes out oil pocket, thus ensure the delivery pressure at the first oil outlet place, avoid heavy mechanical equipment when oil starvation because Action of Gravity Field falls, cause machinery and casualties.
Every technician's notice: although the present invention describes according to above-mentioned embodiment, invention thought of the present invention is not limited in this invention, and the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.
Claims (7)
1. a load holding valve, it is characterized in that: comprise the first valve body (1), first spool (11), first elastic component (12), second valve body (2), second spool (21) and the second elastic component (22), described the first valve body (1) is provided with the first filler opening (13), first oil outlet (14) and holding cavity (15), described the first spool (11) to be located in holding cavity (15) and holding cavity (15) is separated into the first oil suction chamber (151), first goes out oil pocket (152) and the first pressure stabilizing cavity (153), described the first spool (11) has the primary importance that seals mutually with the first valve body (1) and is backed down the second place making the first oil suction chamber (151) and first go out oil pocket (152) to be connected by hydraulic oil, described the first elastic component (12) has the movement tendency that the first spool (11) is sealed mutually with the first valve body (1), described first goes out oil pocket (152) is connected with the first pressure stabilizing cavity (153), described the second valve body (2) is provided with the second filler opening (23), drain tap (24) and communicated cavity (25), described the second spool (21) is located in communicated cavity (25), with the second valve body (2) primary importance sealed mutually and the second place making communicated cavity (25) be connected with drain tap (24) when described the second spool (21) has an installation, described communicated cavity (25) is connected with the first pressure stabilizing cavity (153) by intercommunicating pore (26).
2. load holding valve according to claim 1, it is characterized in that in described the second valve body (2), being provided with push rod (27) and the 3rd elastic component (28), one end of described push rod (27) is corresponding with the second spool (21), the other end is corresponding with the second filler opening (23), and the 3rd described elastic component (28) has the movement tendency making push rod (27) away from the second spool (21).
3. load holding valve according to claim 2, is characterized in that described the second valve body (2) is provided with swivel nut (29), and described swivel nut (29) and push rod (27) offset.
4. load holding valve according to claim 2, it is characterized in that described the second spool (21) comprise the top splenium (211) corresponding with push rod (27), with the conus portion (212) of the second valve body (2) conical surface seal, the reset boss part (213) offseted with the second elastic component (22) and guide portion (214).
5. load holding valve according to claim 1, is characterized in that the outer surface of described first spool (11) is provided with the sealing inclined-plane (111) for sealing mutually with the first valve body (1) inwall.
6. load holding valve according to claim 1, is characterized in that described first is gone out oil pocket (152) and be connected with the first pressure stabilizing cavity (153) by damping hole (112).
7. load holding valve according to claim 1, is characterized in that described intercommunicating pore (26) is oblique and is arranged on the second valve body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510193345.8A CN104763822B (en) | 2015-04-23 | 2015-04-23 | Load maintaining valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510193345.8A CN104763822B (en) | 2015-04-23 | 2015-04-23 | Load maintaining valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104763822A true CN104763822A (en) | 2015-07-08 |
| CN104763822B CN104763822B (en) | 2017-02-01 |
Family
ID=53645834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510193345.8A Active CN104763822B (en) | 2015-04-23 | 2015-04-23 | Load maintaining valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104763822B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230617A (en) * | 2019-06-24 | 2019-09-13 | 徐州阿马凯液压技术有限公司 | A kind of novel load holding valve |
| CN112431805A (en) * | 2020-12-04 | 2021-03-02 | 涌镇液压机械（上海）有限公司 | Proportional pressure reducing valve with integrated pressure stabilizing function |
| CN112855640A (en) * | 2019-11-27 | 2021-05-28 | 哈威液压股份公司 | Valve cone, load holding valve with valve cone and method for assembling check valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2205385B (en) * | 1987-05-15 | 1991-03-27 | Oil Control Spa | Improvements in a load holding and control valve,in particular for hydraulic circuits with either open or closed centre directional control valve. |
| CN2247735Y (en) * | 1995-01-27 | 1997-02-19 | 长沙交通学院 | Combined integrated block hydraulically balanced valve |
| CN201155498Y (en) * | 2008-01-21 | 2008-11-26 | 浙江圣邦机械有限公司 | Integrated one-way balance valve |
| CN201232784Y (en) * | 2008-07-17 | 2009-05-06 | 贵州枫阳液压有限责任公司 | Load holding valve |
| CN203614845U (en) * | 2013-10-23 | 2014-05-28 | 宁波明启液压机械有限公司 | Pilot type pressure reducing valve |
| CN204553939U (en) * | 2015-04-23 | 2015-08-12 | 圣邦集团有限公司 | Load holding valve |
-
2015
- 2015-04-23 CN CN201510193345.8A patent/CN104763822B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2205385B (en) * | 1987-05-15 | 1991-03-27 | Oil Control Spa | Improvements in a load holding and control valve,in particular for hydraulic circuits with either open or closed centre directional control valve. |
| CN2247735Y (en) * | 1995-01-27 | 1997-02-19 | 长沙交通学院 | Combined integrated block hydraulically balanced valve |
| CN201155498Y (en) * | 2008-01-21 | 2008-11-26 | 浙江圣邦机械有限公司 | Integrated one-way balance valve |
| CN201232784Y (en) * | 2008-07-17 | 2009-05-06 | 贵州枫阳液压有限责任公司 | Load holding valve |
| CN203614845U (en) * | 2013-10-23 | 2014-05-28 | 宁波明启液压机械有限公司 | Pilot type pressure reducing valve |
| CN204553939U (en) * | 2015-04-23 | 2015-08-12 | 圣邦集团有限公司 | Load holding valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230617A (en) * | 2019-06-24 | 2019-09-13 | 徐州阿马凯液压技术有限公司 | A kind of novel load holding valve |
| CN110230617B (en) * | 2019-06-24 | 2020-04-07 | 徐州阿马凯液压技术有限公司 | Novel load holding valve |
| CN112855640A (en) * | 2019-11-27 | 2021-05-28 | 哈威液压股份公司 | Valve cone, load holding valve with valve cone and method for assembling check valve |
| CN112855640B (en) * | 2019-11-27 | 2023-04-18 | 哈威液压股份公司 | Valve cone, load holding valve with valve cone and method for assembling check valve |
| CN112431805A (en) * | 2020-12-04 | 2021-03-02 | 涌镇液压机械（上海）有限公司 | Proportional pressure reducing valve with integrated pressure stabilizing function |
| CN112431805B (en) * | 2020-12-04 | 2024-05-17 | 涌镇液压机械（上海）有限公司 | Proportional pressure reducing valve integrating pressure stabilizing function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104763822B (en) | 2017-02-01 |
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