CN85104146A

CN85104146A - Hand controled synchronous reversal valve

Info

Publication number: CN85104146A
Application number: CN 85104146
Authority: CN
Inventors: 叶光祖
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-06-03
Filing date: 1985-06-03
Publication date: 1986-12-03

Abstract

The present invention proposes a kind of complex hydraulic valve, be characterized in that the mobile of changeover valve core plays the role of changing, rotated and adjusted synchronously and control action with synchronous and commutation function.Easy to operate, two loops can be synchronously also can asynchronous work, can adjust separately apace and move.There are 5 kinds of operating devices can supply to select for use.

Description

Hand controled synchronous reversal valve

The present invention relates to a kind of hydrovalve, particularly a kind of hydrovalve that plays commutation and synchronization control effect simultaneously.

Synchronous valve and selector valve are two kinds of valves commonly used in the hydraulic system, the former equates the flow in two execution loops substantially or is proportional, thereby reaches the purpose of speed synchronization, and the latter mainly changes the liquid flow path direction, the two uses in the same system of being everlasting, but does not have inherent contact on the general utility functions.Because synchronous valve has inevitable diversity stream error, will cause journey error in actuator's (as oil cylinder), generally to take measures to eliminate or compensation.Can locate at actuator's terminal point in the system of (if can dieback, or two oil circuits can disconnect respectively), generally the terminal point repairing function by synchronous valve solves, and makes a side of stroke deficiency reach terminal point by low speed.Because compensation speed far below normal speed, often causes more time loss, a large amount of high pressure oils overflow from relief valve in Constant Pump System simultaneously, cause energy waste and have aggravated system's heating.In the system that terminal point can not be located, the way that then will take to drain the oil is revised journey error, and this will increase element and pipeline, make complex system, and cost improves, and troublesome poeration.Particularly handle increases in the manual system, operation inconvenience.Present in addition synchronous valve speed ratio is generally fixed, and when system requires synchronous working sometimes, does not require sometimes synchronously or when needing single movement, present valve just can not adapt to.

The objective of the invention is in the hand-hydraulic system, the correction of synchronization error and the change of working state of system can be carried out easily, and system should be very simple.

Realize that method of the present invention is that synchronous valve and hand-operated direction valve are made combination valve (referring to accompanying drawing 1), on changeover valve core (5), make notch (6) and be connected with oil back chamber, leave oil distributing hole (LK1), (LK2) on the valve body (2) and link to each other with oil duct with oil pocket (K1), (K2) at synchronous valve two ends, thereby the action of synchronous valve is controlled in the rotation that can utilize spool (5), and axial displacement still plays the role of changing.When spool did not rotate, oil distributing hole (LK1), (LK2) were closed, and synchronous valve plays normal branch, afflux effect.When a certain side oil circuit needs single movement such as need A1 oil return, the A2 sealing is then shifted to spool (5) left side and is rotated to an angle and makes (K1) chamber and oil return logical, and hook spool (3) moves to left and makes A2 seal A1 standard-sized sheet and oil return.Need export as A1, then spool (5) be moved to right and rotates to an angle, make the logical oil return in K2 chamber then two hook spools (3) draw back and move to right, be still the A2 sealing, the A1 standard-sized sheet, thereby realize single movement or adjustment.If angle of swing is less, locate to form restriction at (LK1) or (LK2), then the pressure drop in K1, K2 chamber is controlled, and for example restriction LK2 slightly opens under minute stream mode, the K2 cavity pressure descends, hook spool (3) moves to right, and the second throttle mouth of A2 turns down, and the A1 mouth is opened greatly, the K1 cavity pressure descends, the K2 cavity pressure gos up, and under new state balance, thereby make A1, A2 inequality output occur.Unnecessary oily stream enters oil back chamber.Too big for preventing that P1, P2 from descending, can go up at spool (3) as Fig. 4 and make a throttling pore (d), can limit its pressure drop.Spool sensitivity decreases, and stability increases.Stable state shunting performance there is not influence.When the hand adjustment inequality was worked, the working state of valve was between synchronous and throttling.Another kind method is that (LK1), (LK2) are linked to each other with A1, A2 chamber, directly drains the oil and adjusts, and also can play above-mentioned effect, and is little to the dynamic synchronization performance impact, but efficient is low slightly.Two kinds of methods all are practical.Below as can be seen, the present invention has following advantage:

One, easy to operate.Can finish commutation and synchronization control simultaneously by a handle, arrange, use all very flexible.

Two, with better function.Two kinds of working methods of any speed ratio of accurate fixed speed ratio and hand adjustment and conversion are at any time arranged, and two loops can be adjusted separately or move.

Three, adjust and compensate speed soon, save time, system effectiveness improves, the heating minimizing.

Four, system simplification replaces three or four valves with a combination valve, is convenient to install, and cost reduces.

Fig. 1 is an aufbauprinciple of the present invention;

Fig. 2 is oil distribution port and spool notch relation;

Fig. 3 is for eliminating the oily principle of joining of lateral force;

Fig. 4 is the structure of synchronous spool band throttle orifice;

Fig. 5,6,7,8 is an operating device.

The synchronous valve structure of implementing to be adopted when of the present invention can be a hook valve core type shown in Figure 1, also can be the reversing piston formula; Can be fixed, also can be self-regualting type.Can adopt whole valve body, also can adopt the synchronous valve superposition on selector valve or the way of side.Notch (6) on the spool (5) should be divided into two staggered parts, dotted line on the spool (5) and solid line two notches partly as shown in Figure 1, so that spool (5) is when turning to a certain side, no matter which end it is in, no matter being shunting or afflux two conditions promptly, all is the action in same loop of control.Notch (6) open on any of two outside shoulders can, also can all make notch on the shoulders in two outsides, K1, K2 two chambeies directly are attached thereto respectively, can simplify the processing of runner, but axial dimension are bigger.Monolateral notching construction shown in Figure 2 is simple, has lateral force to press to a side after the valve rotation.But the friction torque that can utilize it to cause.Shown in Figure 3ly join oily mode and can eliminate lateral force, but the runner processing complexity.Can consider to leave and join oily runner with the processing of simplifying valve body, join the way of oil respectively, then must make no lateral force and join oil, otherwise also have the side direction impacting force when commutating as adopting two shoulders at bonnet (7).The length that if can cast out semi-circular runner (dispensing window is answered machining) two valves on valve body is also just in time mated (do not match shown in Figure 1 not belonging to), and then the structure of valve can be simpler with processing.

The structure of selector valve also can be that other are various forms of.

The operating device of valve (1) is shown in Fig. 5,6,7,8.Rotary support among Fig. 5 (8) can be gone up at end cap (9) and rotate.Handle 20 can rotate in shaking cover (10) among Fig. 6, makes connecting rod (11) make valve core rotation by ball pin (12), perhaps moves.Fig. 7 is a dual handle type, and handle (21) is used for commutation, and auxiliary-handle (13) is used for synchronous adjustment.Cover (15) is at the overhead cover of spool (5), and overlaps (14) and spool (5) is fixed together.Also should there be return spring or steel ball positioning means etc. in above mechanism, not expression among the figure.Handle among Fig. 8 (22) is the shift fork structure, on the following shape spring sheet (16) of band earrings is arranged, top curved part is relative with groove on the cutting ferrule (17), can play the role of positioning.Cutting ferrule (17) is gone up the band auxiliary-handle and is played the synchronization control effect.Also can not be with auxiliary-handle and will sell (18) two ends and stretch out and be connected with backguy or pull bar, the other end of backguy or pull bar links to each other with the movable handle on handle (22) top, and the swing that utilizes handle is the rotation of controllable valve core (5).

Claims

1, a kind of by synchronous valve, the hydrovalve that hand-operated direction valve is combined into, it is characterized in that the body K1K2 of synchronous valve or oil distribution port [LK1], [LK2] of A1, A2 and selector valve communicate, notch (6) and oil back chamber 0 on the spool (5) communicate, can when rotating, spool (5) communicate with [LK1] or [LK2], and have a cover that spool (5) can be moved axially, the operating device that can rotate (1) again.

2, hydrovalve as claimed in claim 1 is characterized in that notch (6) on the spool (5) is arranged on 1 or two shoulders alternately.

3, as claim 1,2 described hydrovalves, it is characterized in that having on the synchronous valve spool (3), throttling pore (d) is arranged on it, but (LK1), (LK2) and K1, K2 are logical.

4, as claim 1,2,3 described hydrovalves, it is characterized in that having on the selector valve bonnet (7), handlebar on it (LK1) or (LK2) are linked to be the runner that opposed no lateral force is joined oil.

5,, it is characterized in that synchronous valve and selector valve are assemblied on the same valve body as claim 1,2,3 described hydrovalves.

6,, it is characterized in that the synchronous valve superposition is on selector valve or the side as claim 1,2,3 described hydrovalves.

7,, it is characterized in that operating device (1) forms by being installed in rotary support (8) on the end cover (9) and handle (19) etc. as claim 1,2,3 described hydrovalves.

8,, it is characterized in that handle (20) that operating device (1) might rotate is loaded on to shake in the cover (10) that by connecting rod (11), ball pin (12) links to each other with spool (5) as claim 1,2,3 described hydrovalves.

9, as claim 1,2,3 described hydrovalves, it is characterized in that the auxiliary-handle (13) of operating device (1) links to each other with spool (5) by cover (14), the cover (15) of the overhead cover of spool (5) links to each other with the handle (21) of dribbling head.

10, as claim 1,2,3 described hydrovalves, it is characterized in that the lower end of the handle (22) of operating device (1) is a shift fork shape, towering shape spring sheet (16) is loaded on handle (22) and upward and with the groove of cover (17) contacts, and on the cover (17) handle is arranged.

11, hydrovalve as claimed in claim 10 is characterized in that the pin 18 on the cover (17) overhangs out, links to each other with handle (22) upper movable handle by backguy or pull bar, and cover (17) is gone up no handle.