CN205858838U - A kind of balanced valve - Google Patents
A kind of balanced valve Download PDFInfo
- Publication number
- CN205858838U CN205858838U CN201620876122.1U CN201620876122U CN205858838U CN 205858838 U CN205858838 U CN 205858838U CN 201620876122 U CN201620876122 U CN 201620876122U CN 205858838 U CN205858838 U CN 205858838U
- Authority
- CN
- China
- Prior art keywords
- valve
- main
- chamber
- back cavity
- valve rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Check Valves (AREA)
Abstract
This utility model relates to a kind of balanced valve, it is at existing valve body, improve on the basis of main valve plug and nonreturn valve core etc., displacement controller is i.e. installed on valve body, this displacement controller includes the valve rod in third channel and the 3rd spring in valve body that slide, valve rod coordinates with the 3rd control mouth on third channel and third channel is separated into valve rod ante-chamber and back cavity, 3rd spring and valve rod offset and make valve rod have the trend opening the 3rd control mouth all the time, valve rod back cavity is connected with main valve back cavity, valve rod ante-chamber is connected with check valve ante-chamber, and one end of valve rod stretches out in and becomes operating side outside valve body.In use, can control commutating period of valve rod well, just can control stroke when load rises the most easily, when being applied to amplitude oil cylinder, it become convenient substantially that control the upper height of lorry-mounted crane, i.e. need not its height para-position is confirmed, thus greatly increase work efficiency and handling, and displacement controller is arranged in valve body, compact conformation, it is simple to control.
Description
Technical field
This utility model relates to a kind of hydraulic control valve, is specifically related to a kind of hydraulically balanced valve.
Background technology
In the field such as engineering machinery, handling machinery, in order to prevent load from hypervelocity danger occurring when declining, generally make
The decrease speed of load is controlled with balanced valve.Such as " hydraulically balanced valve " that Chinese patent Authorization Notice No. is CN1170067C and
Chinese patent Authorization Notice No. is the structure that " the combination hydraulic balanced valve " of CN20273256U all discloses balanced valve.
At present, though the structure of balanced valve is in any number of forms, but in load uphill process, pressure oil is generally from balance
The A hydraulic fluid port of valve enters, and after backing down check valve, flows out from B hydraulic fluid port, and the inside of balanced valve does not has other spool pair the most in the process
Fluid is controlled.And to control to load upward stroke, as telescopic oil cylinder stretches the angle of stroke, amplitude oil cylinder, the most logical
Cross outside frame for movement or oil cylinder stroke limits and realizes.Adopt in such a way, though use requirement can be met, but need every
The secondary upper height para-position to lorry-mounted crane confirms, causes work efficiency low, and processing safety has much room for improvement.
And along with the development of society, crane gear application scenario is the most extensive, and the railway such as occurred hangs, city
The extraordinary crane gear such as narrow space crane gear, they need to use in some specific regions, this handling to balanced valve
(such as stationarity, fine motion) has higher requirement, and therefore needs to be improved further to existing balanced valve.
Utility model content
Technical problem to be solved in the utility model is the present situation for prior art, it is provided that one can be controlled easily
The balanced valve of system load lifting height.
The technical scheme that the above-mentioned technical problem of this utility model solution is used is: a kind of balanced valve, includes valve body, master
Spool and nonreturn valve core, have the first main hydraulic fluid port, the second main hydraulic fluid port and control port on described valve body, set in described valve body
Have on the first passage and second channel, described main valve plug and first passage slided for above-mentioned main valve plug, nonreturn valve core respectively
First controls mouth coordinates and first passage is separated into main valve ante-chamber and main valve back cavity, is provided with main in described main valve ante-chamber
The piston that body core is connected, is provided with in described main valve back cavity and offsets with main valve plug and make main valve plug have closedown first all the time
Control the first spring of mouth trend；Described nonreturn valve core coordinates with the second control mouth on second channel and is separated by second channel
Become check valve ante-chamber and check valve back cavity, described check valve back cavity is provided with and offsets with nonreturn valve core and make nonreturn valve core all the time
There is the second spring closing the second control mouth trend；Described first main hydraulic fluid port is connected with main valve back cavity, the second main hydraulic fluid port with
Main valve ante-chamber, check valve back cavity are connected, and described control port is connected with the rodless cavity of piston, it is characterised in that: described
Being also equipped with displacement controller on valve body, this displacement controller includes the valve rod slided in third channel in valve body and the
Three springs, after described valve rod coordinates with the 3rd control mouth on third channel and third channel is separated into valve rod ante-chamber and valve rod
Chamber, described 3rd spring and valve rod offset and make valve rod have the trend opening the 3rd control mouth all the time, described valve rod back cavity with
Main valve back cavity is connected, and described valve rod ante-chamber is connected with check valve ante-chamber, and one end of described valve rod stretches out in outside valve body
And become operating side.
In such scheme, it is formed with chamber between the other end and the third channel of described valve rod, it is preferred that described
Valve body on a threaded venting stud, this venting stud has the aperture connecting this chamber.So move at valve rod
During Dong, chamber carries out " breathing ", to avoid building the pressure by the aperture of venting stud, it is ensured that the flexible of valve rod is moved.
Force in valve rod for convenience, it is preferred that threaded on the operating side of described valve rod have manipulation joint, this behaviour
Handle hole is had, in order to actuator is connected on longitudinal joint.
In order to reduce from controlling the fluid impulsive force to piston that mouth enters, the rodless cavity of described piston is provided with band damping
The damping block in hole, described control port is connected with the rodless cavity of piston by the damping hole on this damping block.
In above-mentioned each scheme, it is preferred that described nonreturn valve core is designed to hollow structure and is formed and described check valve
The cavity that core back cavity is connected, has connection main valve ante-chamber and the through hole of check valve back cavity on this nonreturn valve core sidewall, and
And one end of described second spring is seated in the cavity of this nonreturn valve core, the other end and the first bullet being threaded on valve body
Spring abutment offsets.To facilitate the location of the second spring, it is ensured that the steady of nonreturn valve core moves.
In above-mentioned each scheme, it is further preferred that, the most threaded on described first passage it is enclosed within outside main valve plug
Valve pocket, the inner of this valve pocket is adjacent at the first control mouth, in described valve pocket formed for described first spring place bullet
Spring chamber, has the through hole of connection spring cavity and main valve back cavity in described sleeve side wall.When main valve plug moves, spring cavity is through logical
Hole " is breathed ", it is ensured that the steady of main valve plug moves, and is simultaneously also beneficial to the installation of the first spring.
In order to regulate the unlatching pressure of main valve plug easily, the outer end of described valve pocket is exposed to described valve body, at this valve pocket
Threaded on exposed junction have pressure regulating screw, and the inner face of this pressure regulating screw offsets with described first spring.
More practical, described valve body is provided with the counterbore of multiple genesis analysis, and the bottom of each counterbore has installing hole, and
The bottom of each counterbore is adjacent to the bottom surface of valve body.So when installing this balanced valve, tighten installation screw, be also not result in valve body
Deformation, thus can be further assured that the easy slide of valve rod, main valve plug and nonreturn valve core.
Compared with prior art, owing to this utility model is additionally arranged displacement controller in balanced valve body, by driving valve
The operating side of bar, on-demand can make to move outside valve rod and close the 3rd control mouth, make main valve back cavity and check valve ante-chamber cut off mutually, because of
And when actually used, commutating period of valve rod can be controlled well, it is possible to control stroke when load rises the most easily,
When being applied to amplitude oil cylinder, it become convenient substantially that control the upper height of lorry-mounted crane, i.e. need not its height para-position
Confirm, thus greatly increase work efficiency and handling, and displacement controller is arranged in valve body, compact conformation,
It is easy to control.
Accompanying drawing explanation
Fig. 1 is the front view of this utility model embodiment；
Fig. 2 is the upward view of Fig. 1；
Fig. 3 is that the A-A in Fig. 2 is to sectional view；
Fig. 4 is this utility model embodiment schematic diagram when being applied to amplitude oil cylinder and telescopic oil cylinder.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
As shown in Figure 1 to Figure 3, this balanced valve includes valve body 1, main valve plug 2 and nonreturn valve core 3 and displacement controller 4,
Wherein displacement controller 4 includes valve rod 41, is provided with and slides for above-mentioned main valve plug 2, nonreturn valve core 3, valve rod 41 respectively in valve body 1
First passage 11, second channel 12 and third channel 13, in the present embodiment, this first passage 11, second channel the 12, the 3rd
The equal cross direction profiles of passage 13 and arranging the most separately, main valve plug 2 and the first control mouth 111 on first passage 11
Coordinating and first passage 111 is separated into main valve ante-chamber 112 and main valve back cavity 113, main valve plug 2 is provided with and controls mouth with first
The throttling channel 21 that 111 match, is provided with the piston 22 being connected with main core 2, in main valve back cavity 113 in main valve ante-chamber 112
Threaded have the valve pocket 5 being enclosed within outside main valve plug 2, and the inner of this valve pocket 5 is adjacent at the first control mouth 111, the outer end of valve pocket 5
Being exposed to valve body 1, threaded on the exposed junction of this valve pocket 5 have pressure regulating screw 6, is formed and place for the first spring a1 in valve pocket 5
Spring cavity, the two ends of this first spring a1 offset with this pressure regulating screw 6 and main valve plug 2 respectively, make main valve plug 2 have pass all the time
Close the trend of the first control mouth 111.
Above-mentioned nonreturn valve core 3 coordinates with the second control mouth 121 on second channel 12 and second channel 12 is separated into list
To valve ante-chamber 122 and check valve back cavity 123, in the present embodiment, nonreturn valve core 3 is designed to hollow and is formed and described nonreturn valve core
The cavity that back cavity 123 is connected, has connection main valve ante-chamber 112 and the passing through of check valve back cavity 123 on this nonreturn valve core 3 sidewall
Perforation 31；Second spring a2 is seated in the cavity of this nonreturn valve core 3, and its one end offsets with nonreturn valve core, the other end and screw thread
The the first spring base b1 being connected on valve body 1 offsets, and makes nonreturn valve core 3 have the trend closing the second control mouth 121 all the time.
Before above-mentioned valve rod 41 coordinates with the 3rd control mouth 131 on third channel 13 and third channel 13 is separated into valve rod
Chamber 132 and valve rod back cavity 133, the 3rd spring a3 is positioned in valve rod back cavity 133, the two ends of the 3rd spring a3 respectively with valve rod
41, the second spring base b2 offset and make valve rod 41 have all the time open the 3rd control mouth 133 trend, the most in its natural state,
3rd controls mouth 133 is in open mode, and the second spring base b2 is also threaded on valve body 1, and one end of valve rod 41 is by the
Two spring base b2 stretch out in becomes operating side outside valve body 1, in order to force in this valve rod 41, and screw thread on the operating side of this valve rod
Connect and have manipulation joint 42, this manipulation joint has handle hole 421, in order to external actuator.The other end of valve rod 41 with
A chamber 134 it is formed with between third channel, a venting stud 7 threaded on valve body, this venting stud 7 has
Connect the aperture 71 of this chamber.
In the present embodiment, it is further opened with the first vertical passage 14, second the most spaced apart in valve body the most logical
Road the 15, the 3rd vertical passage 16, first, second vertical passage all runs through the upper surface of valve body, and sets in respective upper port
Being equipped with plug c, the 3rd the most logical 16 roads run through the bottom surface of valve body 1.First vertical passage 14 respectively with main valve back cavity 113, valve
Bar back cavity 133 is connected, and the second vertical passage 15 is connected with check valve ante-chamber 122, valve rod ante-chamber 112, the 3rd vertical passage
16 are connected with main valve ante-chamber 112, check valve back cavity 123.On above-mentioned valve pocket 5 sidewall, have connection spring cavity and main valve simultaneously
The through hole 51 of back cavity 113, i.e. spring cavity are connected with the first vertical passage 14 by through hole 51.
Have on valve body 1 first main hydraulic fluid port A (the auxiliary hydraulic fluid port A ' being connected with the first main hydraulic fluid port A), the second main hydraulic fluid port B and
Control port X (or controlling mouth G), the first main hydraulic fluid port A is connected with main valve back cavity 113；Second main hydraulic fluid port B is the 3rd vertical passage
The 16 bottom surface ports running through valve body 1, i.e. this second main hydraulic fluid port B are connected with main valve ante-chamber 112, check valve back cavity 133；Control
Hydraulic fluid port X is connected with the rodless cavity of piston 22, in the present embodiment, is provided with the damping block of band damping hole 81 in the rodless cavity of piston 22
8, control port X are connected with the rodless cavity of piston by the damping hole 81 on this damping block.Pass through damping hole so that from control
The fluid of the certain pressure that mouth enters is more steady, reduces the impulsive force to piston.
During installation, valve body is installed screws 9 by four and is fixed at desired area, in order to ensure main valve plug 2, valve rod 41
The most mobile, in the present embodiment, valve body has four counterbores 17 the deepest, the bottom of each counterbore 17 has installing hole, uses
Installing screw in planting, in the present embodiment, the bottom of each counterbore has been adjacent to the bottom surface of valve body, it is therefore an objective to prevent counterbore shallower
Time, tighten installation screw and valve body deformation can be caused relatively large, and valve rod, the main valve plug inflexible phenomenon of slip occurs.
When the present embodiment is applied in amplitude oil cylinder, as shown in Figure 4, its operation principle is as follows: when pressure oil is main from first
Hydraulic fluid port A enters, and now, fluid enters into successively after main valve back cavity, the first vertical passage, third channel, the second vertical passage
The ante-chamber of check valve, overcomes the pretightning force of the second spring, promotes nonreturn valve core to move right, pressure oil through second control mouth, the
Flow into the rodless cavity of amplitude oil cylinder from the second main hydraulic fluid port B after two vertical passages, drive and move on the piston rod of amplitude oil cylinder 10, when
When moving on to desired location on the piston rod of amplitude oil cylinder, external force drives valve rod overhanging, overcomes the active force of the 3rd spring, makes valve rod
Closing the 3rd control mouth, cut off the first vertical passage and second longitudinal road, in this moving process, chamber is by venting stud
Aperture carries out " breathing ", to avoid building the pressure.Obviously, if the piston rod of telescopic oil cylinder 20 all stretches out, the height of distance barrier
When difference is α for L, change angle, for required duty, as long as that controls the time starting to drive valve rod overhanging well, really
The piston rod protecting amplitude oil cylinder is exposed to amplitude oil cylinder cylinder body X distance.Therefore, when actually used, it is not necessary to every time to rising
The upper height para-position of heavy-duty machine confirms, as long as controlling the beginning operating time of valve rod, thus improves work efficiency and behaviour significantly
Make safety.
When the piston rod of amplitude oil cylinder needs to move down, when control port X connected by pressure oil, the pressure of control port X divides
Tong Guo not be transferred to the rodless cavity of piston after damping hole, now overcome the first spring, promote main valve plug to move to left, make the first control mouth
Opening, the fluid entered from the second main hydraulic fluid port B flows out to the first main hydraulic fluid port A through the first control mouth successively.In the process, bullet
Spring chamber is connected by through hole and the first vertical passage, and during to prevent main valve plug from moving to left, spring cavity builds the pressure.And open main valve plug
Pressure size, can be adjusted by rotating pressure regulating screw, the tightest with nut after having regulated.
Claims (8)
1. a balanced valve, includes valve body (1), main valve plug (2) and nonreturn valve core (3), has first on described valve body (1)
Main hydraulic fluid port (A), the second main hydraulic fluid port (B) and control port (X), be provided with in described valve body (1) respectively for above-mentioned main valve plug (2),
First passage (11) that nonreturn valve core (3) slides and second channel (12), described main valve plug (2) and the first control on first passage
Donsole (111) coordinates and first passage is separated into main valve ante-chamber (112) and main valve back cavity (113), at described main valve ante-chamber
(112) piston (22) being connected with main core (2) is installed in, is provided with and main valve plug in described main valve back cavity (113)
(2) offset and make main valve plug (2) have the first spring (a1) closing the first control mouth (111) trend all the time；Described check valve
Core (3) coordinates with the second control mouth (121) on second channel and second channel is separated into check valve ante-chamber (122) and unidirectional
Valve back cavity (123), is provided with in described check valve back cavity (123) and offsets with nonreturn valve core (3) and make nonreturn valve core (3) have all the time
There is the second spring (a2) closing the second control mouth (121) trend；Described first main hydraulic fluid port (A) is connected with main valve back cavity (113)
Logical, the second main hydraulic fluid port (B) is connected with main valve ante-chamber (112), check valve back cavity (123), described control port (X) and piston
(22) rodless cavity is connected, it is characterised in that: on described valve body, it is also equipped with displacement controller (4), this displacement controller
Include the valve rod (41) and the 3rd spring (a3) slided in third channel (13) in valve body (1), described valve rod (41) and
The 3rd control mouth (131) on third channel coordinates and third channel is separated into valve rod ante-chamber (132) and valve rod back cavity
(133), described 3rd spring (a3) and valve rod (41) offset and make valve rod (41) have all the time and open the 3rd control mouth (131)
Trend, described valve rod back cavity (133) is connected with main valve back cavity (113), described valve rod ante-chamber (132) and check valve ante-chamber
(122) it is connected, and one end of described valve rod (41) stretches out in valve body (1) and becomes operating side outward.
Balanced valve the most according to claim 1, it is characterised in that: the other end of described valve rod (41) and third channel (13)
Between be formed with chamber (134), on described valve body, threaded venting stud (7), opens on this venting stud (7)
There is the aperture (71) connecting this chamber.
Balanced valve the most according to claim 1, it is characterised in that: threaded on the operating side of described valve rod (41) have behaviour
Longitudinal joint (42), this manipulation joint has handle hole (421).
Balanced valve the most according to claim 1, it is characterised in that: the rodless cavity of described piston (22) is provided with band damping hole
(81) damping block (8), described control port (X) is by the rodless cavity phase of the damping hole (81) on this damping block with piston (22)
Connection.
Balanced valve the most according to claim 1, it is characterised in that: described nonreturn valve core (3) is designed to hollow structure and shape
Become the cavity being connected with described nonreturn valve core back cavity (133), this nonreturn valve core (3) sidewall has connection main valve ante-chamber
And the through hole (31) of check valve back cavity (123), and one end of described second spring (a2) is seated in this nonreturn valve core (112)
(3), in cavity, the other end offsets with the first spring base (b1) being threaded on valve body (1).
6. according to the balanced valve described in claim 1 to 5 any claim, it is characterised in that: on described first passage (11)
The most threaded have the valve pocket (5) being enclosed within main valve plug (2) outward, and the inner of this valve pocket (5) is adjacent to the first control mouth (111) place,
In described valve pocket (5), form the spring cavity placed for described first spring (a1), described valve pocket (5) sidewall has connection
Spring cavity and the through hole (51) of main valve back cavity (113).
Balanced valve the most according to claim 6, it is characterised in that: the outer end of described valve pocket (5) is exposed to described valve body (1),
Threaded on the exposed junction of this valve pocket (5) have pressure regulating screw (6), the inner face of this pressure regulating screw (6) and described first bullet
Spring (a1) offsets.
8. according to the balanced valve described in claim 1 to 5 any claim, it is characterised in that: described valve body is provided with multiple
The counterbore (17) of genesis analysis, the bottom of each counterbore (17) has installing hole, and the bottom of each counterbore (17) is adjacent to valve body
Bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620876122.1U CN205858838U (en) | 2016-08-14 | 2016-08-14 | A kind of balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620876122.1U CN205858838U (en) | 2016-08-14 | 2016-08-14 | A kind of balanced valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205858838U true CN205858838U (en) | 2017-01-04 |
Family
ID=57593746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620876122.1U Withdrawn - After Issue CN205858838U (en) | 2016-08-14 | 2016-08-14 | A kind of balanced valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205858838U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050784A (en) * | 2016-08-14 | 2016-10-26 | 宁波市博尔法液压有限公司 | Balance valve |
-
2016
- 2016-08-14 CN CN201620876122.1U patent/CN205858838U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050784A (en) * | 2016-08-14 | 2016-10-26 | 宁波市博尔法液压有限公司 | Balance valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201443544U (en) | Multichannel hydraulic control valve used for prorating load flow | |
| CN203271597U (en) | Leveling system of supporting drilling machine component, drilling machine and hydraulic jack of mining machine | |
| CN106481613B (en) | A kind of machine liquid dual fail-safe locked hydraulic cylinder | |
| CN105822618B (en) | A kind of descending valve plate of fork truck electro-hydraulic proportional multi-way valve | |
| CN205858838U (en) | A kind of balanced valve | |
| CN204961455U (en) | Hydro -cylinder, use full cut -off formula hydraulic system of this hydro -cylinder | |
| CN106050784A (en) | Balance valve | |
| CN201096115Y (en) | Hydraulic combined valve | |
| CN201232784Y (en) | Load holding valve | |
| CN202451485U (en) | Hydraulic synchronization independent control device, synchronous hydraulic system and crane | |
| CN203978967U (en) | A kind of high-volume hydraulic commutation loop with interlocking function | |
| CN205639132U (en) | A balance control valve for hydraulic traveling motor | |
| CN203023169U (en) | Synchronous secondary telescopic cylinder | |
| CN103015473A (en) | Priority control method of excavator and movable arm to rotation and priority valve | |
| CN204755443U (en) | Bidirectional balance valve | |
| CN2293690Y (en) | Hydraulic opening & closing device for valve | |
| CN201786791U (en) | Three-position four-way pneumatically-controlled reversing valve | |
| CN201916269U (en) | Integral manual multi-way change valve | |
| CN205779975U (en) | A kind of descending valve plate of fork truck electro-hydraulic proportional multi-way valve | |
| CN103133448A (en) | Energy-saving hydraulic valve with independently-controllable load throttle mouths and hydraulic valve control system | |
| CN204628110U (en) | A kind of car lift deceleration pressure dwelling loop | |
| CN210087713U (en) | Action interlocking type hydraulic cylinder speed regulating valve group | |
| CN208345604U (en) | Closed system integrates switching valve | |
| CN208281258U (en) | A kind of hydraulic drill rig hydraulic control one-way valve | |
| CN204164080U (en) | A kind of oil hydraulic cylinder, pumping mechanism and concrete pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170104 Effective date of abandoning: 20171003 |