CN110242632A - Main-control valve of excavating machine secondary relief with filter device - Google Patents
Main-control valve of excavating machine secondary relief with filter device Download PDFInfo
- Publication number
- CN110242632A CN110242632A CN201910443868.1A CN201910443868A CN110242632A CN 110242632 A CN110242632 A CN 110242632A CN 201910443868 A CN201910443868 A CN 201910443868A CN 110242632 A CN110242632 A CN 110242632A
- Authority
- CN
- China
- Prior art keywords
- valve seat
- main
- main valve
- guide
- valve plug
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000003139 buffering effect Effects 0.000 claims abstract description 11
- 239000000872 buffer Substances 0.000 claims abstract description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
- B01D35/046—Plug, tap, or cock filters filtering elements mounted in or on a faucet the filtering element being mounted in the faucet plug
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
-
- 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
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Analytical Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Safety Valves (AREA)
Abstract
The main-control valve of excavating machine secondary relief with filter device that the invention discloses a kind of, including main valve plug, main valve plug is set to the front of main valve seat inner cavity, the front of main valve plug and main valve seat inner cavity clearance fit, main valve seat front and main valve plug front form linear sealing, main valve plug front end and filter pass through interference fit connection, it is intracavitary in main valve plug to be equipped with buffering spool, buffering spool front section is small outer circle, buffer the small outer circle and main valve plug front inner wall clearance fit of spool, the inner wall of main valve plug and the small outer circle of guide's valve seat front end are tightly connected, the connection of the back-end sealing of guide's valve seat and main valve seat, inner spring is equipped between guide's valve seat and buffering spool, outer spring is equipped between guide's valve seat and main valve plug, guide's valve seat ante-chamber is equipped with pilot valve and forms linear sealing, it is equipped in the rear end of guide's valve seat and adjusts screw, adjust screw with Spring is set between pilot valve.The present invention has filter device at guide oil inlet, reduces the failure of secondary relief hair fastener.
Description
Technical field
The present invention relates to a kind of hydraulic control valves more particularly to a kind of main-control valve of excavating machine with filter device to be overflow with secondary
Valve is flowed, hydraulic device technical field is belonged to.
Background technique
Main-control valve of excavating machine is mainly used for controlling the maximum working pressure of hydraulic system with secondary relief, protects entire liquid
Pressure system safety, reliably, while also having repairing effect in the loop.Present excavator often occurs after a period of operation
It is dipper or swing arm inability and phenomena such as falling arm, severe by investigation discovery excavator working environment, and operator does not pay attention to
The reasons such as maintenance, it is not high to often result in cleanliness of hydraulic oil, therefore secondary overflow can not be normally opened and closed, be caused by sundries card master
Pressure declines in single loop, and excavator can not work normally.
Summary of the invention
The technical problem to be solved by the present invention is solving the secondary relief that excavator how is reduced or avoided by card master
The problem of.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a kind of excavation owner with filter device
Control valve secondary relief, which is characterized in that including main valve plug, main valve plug is before the front of main valve seat inner cavity, main valve plug
Portion and main valve seat inner cavity clearance fit, main valve seat front and main valve plug front form linear sealing, and main valve plug front end and filter are logical
Interference fit connects, and intracavitary in main valve plug to be equipped with buffering spool, buffering spool front section is small outer circle, buffers the small of spool
Outer circle and main valve plug front inner wall clearance fit, the inner wall of main valve plug and the small outer circle of guide's valve seat front end are tightly connected, guide
The connection of the back-end sealing of valve seat and main valve seat is equipped with inner spring, guide's valve seat and main valve plug between guide's valve seat and buffering spool
Between be equipped with outer spring, guide's valve seat ante-chamber is equipped with pilot valve and forms linear sealing, equipped with being used in the rear end of guide's valve seat
The adjusting screw of pressure is adjusted, adjusts and sets spring between screw and pilot valve.
Preferably, the fit clearance between the front of the main valve plug and main valve seat inner cavity is in 0.3-0.4mm.
Preferably, the filter is set in main valve plug front end.
Preferably, the structure of the filter is circular configuration, and filter is equipped with filter screen, the filtering essence of filter screen
Degree is 20~25 μm；The material of filter screen is 40Cr.
Preferably, it is sealed between the small outer circle of guide's valve seat and the inner wall of main valve plug by K-type Te Kangsite
Connection.
Preferably, it is connected through a screw thread between guide's valve seat and main valve seat, is set between guide's valve seat and main valve seat
There is the first O-ring to be sealed.
Preferably, it is connected through a screw thread between the rear end of guide's valve seat and adjusting screw.
Preferably, it is sealed and is fixed by locking nut for non-metal inserts between the adjusting screw and guide's valve seat.
Preferably, pass through retaining ring and third seal with O ring, main valve between the first outer circle and connecting hole of the main valve seat
Second outer circle of seat is fastenedly connected by screw thread and connecting hole, and with the second seal with O ring.
Of the invention compact-sized, good airproof performance, it is interior let out small, and have filter device at guide oil inlet, reduce two
The failure of secondary overflow valve hair fastener, increases the stability of excavator hydraulic system, ensure that the normal opening and closing of guide spool, thus
The antifouling property for strengthening main-control valve of excavating machine extends its service life.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of main-control valve of excavating machine secondary relief with filter device.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
The present invention is a kind of main-control valve of excavating machine secondary relief with filter device, as shown in Figure 1 comprising main valve
Core 8, main valve plug 8 are set to the front of 6 inner cavity of main valve seat, the front of main valve plug 8 and 6 inner cavity clearance fit of main valve seat, fit clearance
In 0.3-0.4mm, 6 front of main valve seat and 8 front of main valve plug form linear sealing.Matched with filter 16 by being full of 8 front end of main valve plug
Connection is closed, filter 16 is set in 8 front end of main valve plug (at guide oil inlet), and sundries is prevented to enter secondary relief guide's valve portion
Point, intracavitary be equipped with buffers spool 13 in main valve plug 8, between 8 front inner wall of small outer circle and main valve plug for buffering 13 front section of spool
Gap cooperation, the small outer circle in 3 front end of guide's valve seat are protruded into 8 inner wall of main valve plug and are fitted close, and close by K-type Te Kangsite envelope 9
Envelope, be connected through a screw thread between guide's valve seat 3 and the rear end of main valve seat 6, and with the first O-ring 5 seal, guide's valve seat 3 with delay
It rushes and is equipped with inner spring 11 between spool 13, outer spring 12 is equipped between guide's valve seat 3 and main valve plug 8, pilot valve 7 is located at guide
3 ante-chamber of valve seat simultaneously forms linear sealing, adjusts screw 1 and protrudes into guide's valve seat 3, is connected through a screw thread to adjust pressure, adjusts spiral shell
Spring 4 is set between nail 1 and pilot valve 7,4 sets of spring on the rear portion of pilot valve 7, are withstood the preceding part of pilot valve 7, are adjusted
Screw 1 and guide's valve seat 3 is saved to be sealed with locking nut for non-metal inserts 2.Pass through gear between 6 first outer circle of main valve seat and connecting hole
Circle 14 and third O-ring 15 seal, and the second outer circle is fastenedly connected by screw thread and connecting hole, and are sealed with the second O-ring 10.
The structure of filter 16 is circular configuration, and filter 16 is equipped with filter screen, the filtering accuracy of filter screen is 20~
25μm；The material of filter screen is 40Cr.
8 inner cavity of main valve plug is hollow, and ante-chamber sets buffering spool 13, and centre is equipped with inner spring 11 and outer spring 12 each one, after
Chamber and guide's valve seat 3 are tightly connected by K-type Te Kangsite envelope 9.3 inner cavity of guide's valve seat is hollow, and ante-chamber sets pilot valve 7, after
Chamber, which is set, adjusts screw 1.It adjusts 1 leading portion of screw to be connected through a screw thread with guide's valve seat 3, rear end fills locking nut for non-metal inserts 2
Sealing.Main valve seat 6 is equipped with 2~6 holes as oil return hole.
The course of work of the invention is as follows:
Under normal condition, pilot valve 7 and main valve plug 8 are in close state, and when pressure rise, high pressure oil is by trimmer valve
Core 13 pours 8 inner cavity of main valve plug, contacts and seals with pilot valve 7, pushes pilot valve 7, and pilot valve 7 is opened emptying, made
8 chamber pressure of main valve plug is lower than P mouthfuls of pressure, and main valve plug 8, which is pushed, to be opened, and P mouthfuls mutually lead to pressure release purpose with T mouthfuls.At P mouthfuls
When pressure is in negative pressure, T mouthfuls of pressure are greater than P mouthfuls of pressure, and hydraulic oil washes main valve plug 8 open and reaches repairing purpose into P mouthfuls.
Claims (9)
1. a kind of main-control valve of excavating machine secondary relief with filter device, which is characterized in that including main valve plug (8), main valve
Core (8) is set to the front of main valve seat (6) inner cavity, the front of main valve plug (8) and main valve seat (6) inner cavity clearance fit, main valve seat (6)
Front and main valve plug (8) front form linear sealing, and main valve plug (8) front end and filter (16) pass through interference fit connection, main valve
Intracavitary in core (8) to be equipped with buffering spool (13), buffering spool (13) front section is small outer circle, buffers the small outer circle of spool (13)
With main valve plug (8) front inner wall clearance fit, the inner wall of main valve plug (8) and the small outer circle of guide's valve seat (3) front end are tightly connected,
Guide's valve seat (3) is connect with the back-end sealing of main valve seat (6), and inner spring is equipped between guide's valve seat (3) and buffering spool (13)
(11), outer spring (12) are equipped between guide's valve seat (3) and main valve plug (8), guide's valve seat (3) ante-chamber is equipped with pilot valve (7)
And linear sealing is formed, it is equipped with the adjusting screw (1) for adjusting pressure in the rear end of guide's valve seat (3), adjusts screw (1) and first
Spring (4) are set between guide valve core (7).
2. a kind of main-control valve of excavating machine secondary relief with filter device as described in claim 1, which is characterized in that institute
Fit clearance between the front and main valve seat (6) inner cavity of the main valve plug (8) stated is in 0.3-0.4mm.
3. a kind of main-control valve of excavating machine secondary relief with filter device as described in claim 1, which is characterized in that institute
The filter (16) stated is set in main valve plug (8) front end.
4. a kind of main-control valve of excavating machine secondary relief with filter device as claimed in claim 1 or 3, feature exist
In the structure of the filter (16) is circular configuration, and filter (16) is equipped with filter screen, and the filtering accuracy of filter screen is
20~25 μm；The material of filter screen is 40Cr.
5. a kind of main-control valve of excavating machine secondary relief with filter device as described in claim 1, which is characterized in that institute
It is tightly connected between the small outer circle for the guide's valve seat (3) stated and the inner wall of main valve plug (8) by K-type Te Kangsite envelope (9).
6. a kind of main-control valve of excavating machine secondary relief with filter device as described in claim 1, which is characterized in that institute
It is connected through a screw thread between the guide's valve seat (3) stated and main valve seat (6), first is equipped between guide's valve seat (3) and main valve seat (6)
O-ring (5) is sealed.
7. a kind of main-control valve of excavating machine secondary relief with filter device as described in claim 1, which is characterized in that institute
It is connected through a screw thread between the rear end and adjusting screw (1) of the guide's valve seat (3) stated.
8. a kind of main-control valve of excavating machine secondary relief with filter device as described in claim 1, which is characterized in that institute
It is fixed between the adjusting screw (1) stated and guide's valve seat (3) by locking nut for non-metal inserts (2) sealing.
9. a kind of main-control valve of excavating machine secondary relief with filter device as described in claim 1, which is characterized in that institute
It is sealed between the first outer circle and connecting hole of the main valve seat (6) stated by retaining ring (14) and third O-ring (15), main valve seat (6)
The second outer circle be fastenedly connected by screw thread and connecting hole, and with the second O-ring (10) seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443868.1A CN110242632A (en) | 2019-05-27 | 2019-05-27 | Main-control valve of excavating machine secondary relief with filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443868.1A CN110242632A (en) | 2019-05-27 | 2019-05-27 | Main-control valve of excavating machine secondary relief with filter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110242632A true CN110242632A (en) | 2019-09-17 |
Family
ID=67885105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910443868.1A Pending CN110242632A (en) | 2019-05-27 | 2019-05-27 | Main-control valve of excavating machine secondary relief with filter device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110242632A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456977A (en) * | 2020-04-09 | 2020-07-28 | 上海诺玛液压系统有限公司 | High-pressure large-flow inverse proportion overflow valve |
| CN113294398A (en) * | 2021-06-07 | 2021-08-24 | 龙工（上海）精工液压有限公司 | Secondary overflow valve for main control valve of excavator |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201037425Y (en) * | 2006-11-13 | 2008-03-19 | 浙江丰隆液压元件有限公司 | Safety valve |
| CN202252194U (en) * | 2011-09-13 | 2012-05-30 | 龙工（上海）桥箱有限公司 | Overflow valve for excavator main control valve |
| CN202955053U (en) * | 2012-10-19 | 2013-05-29 | 宁波海伯天工液压有限公司 | Threaded pilot-operated secondary overflow valve |
| CN203009431U (en) * | 2012-12-26 | 2013-06-19 | 龙工（上海）桥箱有限公司 | Cushion valve for excavator motor |
| CN203321921U (en) * | 2013-06-21 | 2013-12-04 | 泸州国邦机械有限公司 | Pilot-operated type overflow valve |
| CN103697019A (en) * | 2013-12-27 | 2014-04-02 | 龙工（上海）精工液压有限公司 | Safety valve for motor of excavator |
| CN204458619U (en) * | 2015-03-06 | 2015-07-08 | 丹佛斯动力系统（浙江）有限公司 | Relief valve |
| CN105587701A (en) * | 2015-10-23 | 2016-05-18 | 上海立新液压有限公司 | Load maintaining valve |
| CN108167253A (en) * | 2017-12-27 | 2018-06-15 | 邵立坤 | Buffer overflow valve |
| CN208587347U (en) * | 2018-07-20 | 2019-03-08 | 江苏二马液压元件有限公司 | A kind of structure of new multistage trimmer valve |
| CN210799546U (en) * | 2019-05-27 | 2020-06-19 | 龙工（上海）精工液压有限公司 | Secondary overflow valve with filter device for excavator main control valve |
-
2019
- 2019-05-27 CN CN201910443868.1A patent/CN110242632A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201037425Y (en) * | 2006-11-13 | 2008-03-19 | 浙江丰隆液压元件有限公司 | Safety valve |
| CN202252194U (en) * | 2011-09-13 | 2012-05-30 | 龙工（上海）桥箱有限公司 | Overflow valve for excavator main control valve |
| CN202955053U (en) * | 2012-10-19 | 2013-05-29 | 宁波海伯天工液压有限公司 | Threaded pilot-operated secondary overflow valve |
| CN203009431U (en) * | 2012-12-26 | 2013-06-19 | 龙工（上海）桥箱有限公司 | Cushion valve for excavator motor |
| CN203321921U (en) * | 2013-06-21 | 2013-12-04 | 泸州国邦机械有限公司 | Pilot-operated type overflow valve |
| CN103697019A (en) * | 2013-12-27 | 2014-04-02 | 龙工（上海）精工液压有限公司 | Safety valve for motor of excavator |
| CN204458619U (en) * | 2015-03-06 | 2015-07-08 | 丹佛斯动力系统（浙江）有限公司 | Relief valve |
| CN105587701A (en) * | 2015-10-23 | 2016-05-18 | 上海立新液压有限公司 | Load maintaining valve |
| CN108167253A (en) * | 2017-12-27 | 2018-06-15 | 邵立坤 | Buffer overflow valve |
| CN208587347U (en) * | 2018-07-20 | 2019-03-08 | 江苏二马液压元件有限公司 | A kind of structure of new multistage trimmer valve |
| CN210799546U (en) * | 2019-05-27 | 2020-06-19 | 龙工（上海）精工液压有限公司 | Secondary overflow valve with filter device for excavator main control valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456977A (en) * | 2020-04-09 | 2020-07-28 | 上海诺玛液压系统有限公司 | High-pressure large-flow inverse proportion overflow valve |
| CN113294398A (en) * | 2021-06-07 | 2021-08-24 | 龙工（上海）精工液压有限公司 | Secondary overflow valve for main control valve of excavator |
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