CN202560679U - Damping and balancing valve - Google Patents
Damping and balancing valve Download PDFInfo
- Publication number
- CN202560679U CN202560679U CN2012202429319U CN201220242931U CN202560679U CN 202560679 U CN202560679 U CN 202560679U CN 2012202429319 U CN2012202429319 U CN 2012202429319U CN 201220242931 U CN201220242931 U CN 201220242931U CN 202560679 U CN202560679 U CN 202560679U
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Abstract
The utility model discloses a damping and balancing valve. The utility model mainly develops a small-sized balancing valve, and the valve simultaneously has the functions of the balancing valve, dual-overflow protection, control pressure damping and the like. The damping and balancing valve is characterized in that a threaded connecting sleeve (4) and a transition joint (5) are sequentially connected to a valve body (1); an adjustable spring seat (6), a first spring (7) and a spring seat (8) are sequentially arranged in the threaded connecting sleeve (4) from top to bottom; a balancing valve component comprises a main valve core (9) and a one-way valve sleeve (10); and the main valve core (9) penetrates through the one-way valve sleeve (10). The balancing valve adopts the floating type one-way valve sleeve to realize the structural unification of one-way flow and external control flow and has the functions of a one-way valve, a liquid control throttle valve, an overflow valve and the like; and simultaneously, the arrangement of a plurality of dampers can reduce the fluctuation of flow rate passing through the valve due to the fluctuation of external control pressure, and the valve further has the characteristics of advanced functions and compact structure, and is convenient to mount.
Description
Technical field
The utility model relates to the equilibrium valve of control load motion in a kind of engineering machinery hydraulic control system, is specifically related to a kind of equilibrium valve with one-way valve, hydraulic control throttle valve, relief valve and pilot pressure weakening function and compact structure.
Background technique
Equilibrium valve is as the critical elements in the construction machinery hydraulic system; But be a kind of positive freedom unlatching, reverse hydraulic control and multi-functional special valve with pressure limiting effect; It is used for having the hydraulic actuator under the negative load behavior more, guarantees the safe action of the final controlling element under the load effect.In practical applications, equilibrium valve has played and has kept the stable effect of load, accurate operation of its performance impact and safe operation.In the construction machinery hydraulic system field, especially higher in the hydraulic control system of concrete pump truck arm to the requirement of equilibrium valve.Concrete mixer requires respectively to save jib when operation flexible stable, keeps job position after accomplish the location.And that the characteristics of its operation form are jibs is longer, has comparatively significantly vibration, and pilot pressure of its control oil cylinder is also with its variation.Therefore, the equilibrium valve of controlling its motion not only needs to stablize the oil cylinder movement velocity, need realize that also zero leakage is to keep job position constant.
The model utility content
In order to satisfy the requirement of background technique; The utility model provides a kind of weakening equilibrium valve; This equilibrium valve adopts floating type valve seat to realize one-way valve and the structural unification of throttle valve; Have one-way valve, hydraulic control throttle valve, relief valve and pilot pressure weakening function simultaneously, have compact structure, cost is low and the characteristics being convenient to install.
The technological scheme of the utility model is: a kind of weakening equilibrium valve, comprise valve body, relief valve, equilibrium valve assembly and some dampings, and said valve body is provided with the first actuator port F, the second actuator port V, control port S, drain tap R; Be connected with bell tap and transit joint on the valve body in turn, be provided with adjustable spring seat, first spring and spring seat in the bell tap from top to bottom successively, said equilibrium valve assembly comprises main valve plug and unidirectional valve pocket; Unidirectional valve pocket can slide in valve body; Main valve plug passes unidirectional valve pocket, and main valve plug cooperates with unidirectional valve pocket can realize opening or closing passage, and an end and the spring seat of main valve plug offset; The other end of main valve plug cooperates with valve body and communicates with control port S; Be provided with packing ring in the valve body, be provided with second spring between packing ring and the unidirectional valve pocket, the two ends of unidirectional valve pocket are communicated with the first actuator port F and the second actuator port V respectively; The second actuator port V communicates with drain tap R through relief valve.
Described relief valve is a cone valve type adjustable in pressure type relief valve, and relief valve communicates with control port S through control oil channel a1.
Described some dampings lay respectively in the front end oil circuit a2 and control oil channel a1 of control port S, main valve plug, and the damping value scope is: 0.4-1.0mm.
Described control port S connects with control oil channel a1, front end oil circuit a2 respectively through internal oil passages a3.
Be provided with little web plate, stainless steel filter disc and screw thread baffle ring among the described control port S from inside to outside successively.
The utlity model has following beneficial effect: since take such scheme, compact type equilibrium valve structure dwindled equilibrium valve installing space, reduced equilibrium valve weight; The design of relief valve has guaranteed that hydraulic oil can the Yin Wendu rising not cause the danger of sealing the interior oil pressure rising of cavity volume and explosion taking place in the actuator cavity; The design of some dampings has reduced the influence of control port pressure surge.This valve arrangement is reasonable in design, and function is complete, stable performance.
Description of drawings
Accompanying drawing 1 is the plan view of the utility model.
Accompanying drawing 2 is A-A parting face views of the utility model.
Accompanying drawing 3 is B-B parting face views of the utility model.
Accompanying drawing 4 is that the utility model is applied in the hydraulic schematic diagram on the concrete pump truck arm oil cylinder.
1-valve body among the figure, 2-relief valve, 3-damping, 4-bell tap, 5-transit joint, 6-adjustable spring seat, 7-first spring, 8-spring seat, 9-main valve plug, the unidirectional valve pocket of 10-, 11-packing ring, 12-second spring; The little web plate of 13-, 14-stainless steel filter disc, 15-screw thread baffle ring.
F-first actuator port, V-second actuator port, S-control port, R-drain tap, a1-control oil channel, a2-front end oil circuit, a3-internal oil passages.
P-pressure hydraulic fluid port, T-return opening, A, B-actuator port, A1-rodless cavity, B1-rod chamber, J-oil cylinder, I-selector valve, G-load, L1, L2-draining case.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Combine Fig. 2, Fig. 3, shown in Figure 4 by Fig. 1, a kind of weakening equilibrium valve comprises valve body 1, relief valve 2, equilibrium valve assembly and some dampings 3, and said valve body 1 is provided with the first actuator port F, the second actuator port V, control port S, drain tap R; Be connected with bell tap 4 and transit joint 5 on the valve body 1 in turn; Be provided with adjustable spring seat 6, first spring 7 and spring seat 8 in the bell tap 4 from top to bottom successively; Said equilibrium valve assembly comprises main valve plug 9 and unidirectional valve pocket 10, and unidirectional valve pocket 10 can slide in valve body 1, and main valve plug 9 passes unidirectional valve pocket 10; Main valve plug 9 cooperates with unidirectional valve pocket 10 can realize opening or closing passage; One end and the spring seat 8 of main valve plug 9 offset, and the other end of main valve plug 9 cooperates with valve body 1 and communicates with control port S, is provided with packing ring 11 in the valve body 1; Be provided with second spring 12 between packing ring 11 and the unidirectional valve pocket 10, the two ends of unidirectional valve pocket 10 are communicated with the first actuator port F and the second actuator port V respectively; The second actuator port V communicates with drain tap R through relief valve 2.
Described relief valve 2 is a cone valve type adjustable in pressure type relief valve, and relief valve 2 communicates with control port S through control oil channel a1.
Described some dampings 3 lay respectively in the front end oil circuit a2 and control oil channel a1 of control port S, main valve plug 9, and the damping value scope is: 0.4-1.0mm.
Described control port S connects with control oil channel a1, front end oil circuit a2 respectively through internal oil passages a3.
Be provided with little web plate 13, stainless steel filter disc 14 and screw thread baffle ring 15 among the described control port S from inside to outside successively.
The utility model connects transit joint 5 and control port S in use with bolt valve body 1, is that example is explained upward to be applied in amplitude oil cylinder J; Adopt the use that matches of two described weakening equilibrium valves of the utility model; Oil cylinder J goes up rodless cavity A1 and communicates with first equilibrium valve through hydraulic fluid port V1, and communicates with actuator port one A through the first equilibrium valve hydraulic fluid port F1, and rod chamber B1 communicates with second equilibrium valve through hydraulic fluid port V2; And communicate through actuator port two B on the second equilibrium valve hydraulic fluid port F2 and the selector valve; Simultaneously, control port S1 communicates with the second equilibrium valve hydraulic fluid port F2 on first equilibrium valve, and control port S2 communicates with the first equilibrium valve hydraulic fluid port F1 on second equilibrium valve; Pressure hydraulic fluid port P on the selector valve I and oil return inlet T insert hydraulic system, and drain tap R1, R2 communicate with draining case L1, L2 respectively on first and second equilibrium valve.Situation during below with regard to the amplitude oil cylinder proper functioning is analyzed:
The normal lifting operating mode of load: change selector valve I to the work of right position, pressure hydraulic fluid port P communicates with oil outlet one A, gets into equilibrium valve hydraulic fluid port F1; Promote unidirectional valve pocket 10 and move, and main valve plug 9 lower ends and valve body 8 in first equilibrium valve offset, and then form hydraulic fluid port F1 to be connected with hydraulic fluid port V1 to opening direction; Pressure oil is by the rodless cavity A1 of hydraulic fluid port V1 inflow oil cylinder J, and simultaneously, hydraulic fluid port F1 communicates with control port S2; After hydraulic fluid port F1 pressure rose to the main valve plug of opening in second equilibrium valve 9, rod chamber B1 was communicated with oil return inlet T through hydraulic fluid port V2, hydraulic fluid port F2, realized oil return; At this moment, oil cylinder is action smoothly, and the speed of action is relevant with the aperture of two main valve plugs 9.
Load keeps operating mode: change selector valve I to meta, pressure hydraulic fluid port P and oil return inlet T are broken off, and at this moment, receive load G effect, and first equilibrium valve, the second equilibrium valve hydraulic fluid port V1, V2 bear back pressure in various degree, and it is motionless that load keeps.
Operating mode is steadily transferred in load: change selector valve I to the work of position, a left side, pressure hydraulic fluid port P communicates with oil outlet one B, gets into equilibrium valve hydraulic fluid port F2; Promote unidirectional valve pocket 10 and move, and main valve plug 9 lower ends and valve body 1 in second equilibrium valve offset, and then form hydraulic fluid port F2 to be connected with hydraulic fluid port V2 to opening direction; Pressure oil is by the rodless cavity B1 of hydraulic fluid port V2 inflow oil cylinder J, and simultaneously, hydraulic fluid port F2 communicates with control port S1; After hydraulic fluid port F2 pressure rose to the main valve plug of opening in first equilibrium valve 19, rodless cavity A1 was communicated with oil return inlet T through hydraulic fluid port V1, hydraulic fluid port F1, realized oil return; At this moment, oil cylinder is action smoothly, and the speed of action is relevant with the aperture of two main valve plugs 19.
Overflow protection operating mode: when engineering machinery is in bad working environments and selector valve I and is in meta, or unsettled situation possibly appear in load G, or the oil cylinder temperature raises and causes oil cylinder rodless cavity A1 or rod chamber B1 surge pressure possibly surpass the ability to bear of oil cylinder J; This moment, the propagation of pressure to two of a rodless cavity A1 or rod chamber equilibrium valve hydraulic fluid port V1, V2 at first opened relief valve 2 in order to protect oil cylinder J; Fluid flows to draining case L1, L2, if relief valve 2 lost efficacy, owing between main valve plug 9 upper ends and the unidirectional valve pocket 10 difference in areas is arranged; Propagation of pressure to the first spring 16 of hydraulic fluid port V1 or V2; Pressure increases, and then main valve plug 9 is opened, and hydraulic fluid port V1 or V2 communicate with hydraulic fluid port F1 or F2; And then one B1 of the oil outlet on the selector valve I communicates realization overflow protection with oil return inlet T.
Control oily weakening function: when being in lifting or transferring state; System pressure is determined by load; If load state is abominable, oil liquid pressure is prone to produce significantly fluctuation, then also obviously fluctuation of control port S1 or S2 mouth pressure; Because the effect of some dampings 3, the pressure surge that arrives main valve plug 9 control ante-chambers obviously reduces.Stablized the movement speed of oil cylinder, the significantly swing of avoiding jib to cause because of the fluctuation of load.
Because adopting bell tap 4 to connect transit joint 5 structures, the utility model make valve body structure compact; The design of unidirectional valve pocket 10 makes when the utlity model has one-way valve, hydraulic control throttle functionality to possess the function that relief valve is arranged again, compact structure, and cost is low, is convenient to install.Main valve plug 9 cooperates with unidirectional valve pocket 10, but self-aligning, and sealing is reliable; Under the effect of big rigidity second spring 23, reset rapidly, deflection is few; The setting of some dampings 3 has guaranteed derricking cylinder stable action, reliable.This valve arrangement is reasonable in design, and function is complete, stable performance.
The preferred example of the utility model is illustrated, and various variations of being made by those of ordinary skills or remodeling can not break away from the scope of the utility model.
Claims (5)
1. a weakening equilibrium valve comprises valve body (1), relief valve (2), equilibrium valve assembly and some dampings (3), and said valve body (1) is provided with first actuator port (F), second actuator port (V), control port (S), drain tap (R); It is characterized in that: be connected with bell tap (4) and transit joint (5) on the valve body (1) in turn; Be provided with adjustable spring seat (6), first spring (7) and spring seat (8) in the bell tap (4) from top to bottom successively; Said equilibrium valve assembly comprises main valve plug (9) and unidirectional valve pocket (10), and unidirectional valve pocket (10) can slide in valve body (1), and main valve plug (9) passes unidirectional valve pocket (10); Main valve plug (9) cooperates with unidirectional valve pocket (10) can realize opening or closing passage; One end of main valve plug (9) and spring seat (8) offset, and the other end of main valve plug (9) cooperates with valve body (1) and communicates with control port (S), is provided with packing ring (11) in the valve body (1); Be provided with second spring (12) between packing ring (11) and the unidirectional valve pocket (10), the two ends of unidirectional valve pocket (10) are communicated with first actuator port (F) and second actuator port (V) respectively; Second actuator port (V) communicates with drain tap (R) through relief valve (2).
2. a kind of weakening equilibrium valve according to claim 1 is characterized in that: described relief valve (2) is a cone valve type adjustable in pressure type relief valve, and relief valve (2) communicates with control port (S) through control oil channel (a1).
3. a kind of weakening equilibrium valve according to claim 2 is characterized in that: described some dampings (3) lay respectively in the front end oil circuit (a2) and control oil channel (a1) of control port (S), main valve plug (9), and the damping value scope is: 0.4-1.0mm.
4. a kind of weakening equilibrium valve according to claim 3 is characterized in that: control port (S) connects with control oil channel (a1), front end oil circuit (a2) respectively through internal oil passages (a3).
5. according to claim 1,2,3 or 4 described a kind of weakening equilibrium valves, it is characterized in that: be provided with little web plate (13), stainless steel filter disc (14) and screw thread baffle ring (15) in the control port (S) from inside to outside successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202429319U CN202560679U (en) | 2012-05-23 | 2012-05-23 | Damping and balancing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202429319U CN202560679U (en) | 2012-05-23 | 2012-05-23 | Damping and balancing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202560679U true CN202560679U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202429319U Expired - Lifetime CN202560679U (en) | 2012-05-23 | 2012-05-23 | Damping and balancing valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN202560679U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156404A (en) * | 2015-09-21 | 2015-12-16 | 北京精密机电控制设备研究所 | Hydraulic system dynamic correction device capable of effectively inhibiting load resonance |
| CN112145494A (en) * | 2020-10-09 | 2020-12-29 | 山东大学 | Ultrahigh-pressure overflow valve driven by servo motor and working method thereof |
| CN112855633A (en) * | 2021-02-08 | 2021-05-28 | 北京鸣天液压技术有限公司 | Anti-vibration damping type balance valve and control method thereof |
| CN114808815A (en) * | 2022-06-07 | 2022-07-29 | 安徽酷哇机器人有限公司 | Cleaning device, control method thereof and sweeper |
-
2012
- 2012-05-23 CN CN2012202429319U patent/CN202560679U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156404A (en) * | 2015-09-21 | 2015-12-16 | 北京精密机电控制设备研究所 | Hydraulic system dynamic correction device capable of effectively inhibiting load resonance |
| CN105156404B (en) * | 2015-09-21 | 2017-05-10 | 北京精密机电控制设备研究所 | Hydraulic system dynamic correction device capable of effectively inhibiting load resonance |
| CN112145494A (en) * | 2020-10-09 | 2020-12-29 | 山东大学 | Ultrahigh-pressure overflow valve driven by servo motor and working method thereof |
| CN112855633A (en) * | 2021-02-08 | 2021-05-28 | 北京鸣天液压技术有限公司 | Anti-vibration damping type balance valve and control method thereof |
| CN112855633B (en) * | 2021-02-08 | 2021-11-30 | 北京鸣天液压技术有限公司 | Anti-vibration damping type balance valve and control method thereof |
| CN114808815A (en) * | 2022-06-07 | 2022-07-29 | 安徽酷哇机器人有限公司 | Cleaning device, control method thereof and sweeper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |