CN201116554Y

CN201116554Y - Multi-port valve with lock

Info

Publication number: CN201116554Y
Application number: CNU2007200807815U
Authority: CN
Inventors: 王德华; 胡菁琼; 王增亮
Original assignee: SICHUAN CHANGJIANG HYDRAULIC COMPONENT CO Ltd
Current assignee: SICHUAN CHANGJIANG HYDRAULIC COMPONENT CO Ltd
Priority date: 2007-08-24
Filing date: 2007-08-24
Publication date: 2008-09-17
Anticipated expiration: 2017-08-24

Abstract

The utility model discloses a multi-way valve provided with a lock, which comprises a three unit four passage reversing valve and two working oil ports on the valve body of the reversing valve. The utility model is characterized in that one working oil port is mounted with a plug-in type hydraulic control one-way valve whose upper chamber above the ball cup is connected with another working oil port via an oil line arranged on the hydraulic control one-way valve sleeve and the valve body of the reversing valve, and the lower chamber between the steel ball of the hydraulic control one-way valve and the push rod is connected with one working chamber via the oil line arranged on the hydraulic control one-way valve sleeve and the valve body of the reversing valve, the lower chamber of the push rod of the hydraulic control one-way valve is connected with another working chamber of the reversing valve via the oil line on the valve body of the reversing valve. The multi-way valve has the advantages of simple structure, small volume, low cost, high reliability and easy maintenance.

Description

Multi-way valve with lock

Technical field

The utility model relates to a kind of multi-way valve with lock, particularly is applied to the multi-way valve with lock on the combine-harvester.

Background technique

At present, a lot of agricultural and engineering machinery, as combine-harvester, the ceding of Taiwan or worktable settling amount are had relatively high expectations, after the ceding of Taiwan rises to a certain height, require in its operation process, the ceding of Taiwan can remain on a certain height, otherwise will influence the length of the wheat head that cuts, therefore, the multi-way valve actuator port that drives the ceding of Taiwan must be with lock; Adopt the earliest at multi-way valve hydraulic fluid port working surface one fluid-control one-way lock (being equivalent to board-like installation) is installed, this kind hydraulic lock is complex structure not only, and is bulky, and cost is higher, and attachment face leaks poor reliability easily; Changed built-in lock afterwards into, structure is also too complicated, is difficult to maintenance, cost is higher.

The model utility content

The purpose of this utility model is the above-mentioned deficiency at prior art, provide a kind of simple in structure, volume is little, cost is lower, be convenient to keep in repair and the multi-way valve with lock of good reliability.

For achieving the above object, multi-way valve with lock of the present utility model, comprise a three position four-way directional control valve, and be arranged on two actuator ports on this change valve, it is characterized in that wherein in the actuator port plug-in type Pilot operated check valve being installed, the epicoele of this Pilot operated check valve ball seat top links to each other with another actuator port with oil circuit on the change valve by being located at the Pilot operated check valve valve pocket, cavity of resorption between Pilot operated check valve steel ball and the push rod links to each other with an active chamber of selector valve with oil circuit on the change valve by being located at the Pilot operated check valve valve pocket, and the push rod cavity of resorption of Pilot operated check valve links to each other with another active chamber of selector valve by the oil circuit that is located on the change valve;

Working principle of the present utility model is:

The meta position:

When the guiding valve of selector valve is in meta, at this moment two active chambers communicate by throttling groove on the guiding valve and oil back chamber, pressure chamber and two active chambers are obstructed simultaneously, two active chambers do not have oil pressure (return oil pressure is only arranged), the push rod cavity of resorption and the steel ball cavity of resorption that communicate respectively with two active chambers do not have oil pressure yet, can guarantee that like this Pilot operated check valve reliably and rapidly closes;

Commutation position:

When the operation guiding valve makes it from meta during respectively to two side shiftings, pressure chamber is communicated with two active chambers respectively, pressure chamber fluid enters steel ball cavity of resorption and push rod cavity of resorption by the oil circuit that is located on Pilot operated check valve valve pocket and the change valve respectively, push steel ball open by fluid and push rod respectively, fluid is flowed out and backflow from actuator port, realize the rising and the decline of worktable respectively;

In sum, the utility model has made full use of the structural feature of existing multi-way valve, and Pilot operated check valve is the plug-in type structure, be difficult for to leak, have simple in structure, volume is little, cost is lower and good reliability, the advantage of maintenance easily.

Description of drawings

Fig. 1 is the utility model embodiment's a hydraulic schematic diagram.

Fig. 2 is the utility model embodiment's a plan view.

Fig. 3 is the plan view of change valve among Fig. 2.

Embodiment

Is example below in conjunction with accompanying drawing with the multi-way valve with lock that links to each other with the harvester header oil cylinder, and the utility model is described in further detail.

By Fig. 1, Fig. 2 and shown in Figure 3, the utility model embodiment's multi-way valve with lock, comprise a three position four-way directional control valve 1, and be arranged on two actuator port A1 on this change valve 2, B1, wherein by screw thread one Pilot operated check valve 3 is installed in the actuator port A1, the internal structure of this Pilot operated check valve 3 is a prior art, comprise limited post 4, Returnning spring 5, ball seat 6 (can be metal or on-metallic article), valve pocket 7, steel ball 8, valve seat 9, push rod 10, the epicoele of ball seat 6 tops links to each other with another actuator port B1 with oil circuit 14 on the change valve 2 by being located at valve pocket 7, cavity of resorption between steel ball 8 and the push rod 10 links to each other with the active chamber B of selector valve 1 with oil circuit 13 on the change valve 2 by being located at valve pocket 7, and the push rod cavity of resorption links to each other with the active chamber A of selector valve 1 by the oil circuit that is located on the change valve 2;

The working principle of this multi-way valve with lock is as follows:

The meta position:

When the guiding valve 11 of selector valve 1 is in meta, at this moment two active chamber A, B communicate by throttling groove on the guiding valve 11 12 and oil back chamber T, pressure chamber P and two active chamber A, B are obstructed simultaneously, two active chamber A, B do not have oil pressure (return oil pressure is only arranged), the push rod cavity of resorption and the steel ball cavity of resorption that communicate respectively with two active chamber A, B do not have oil pressure yet, can guarantee that like this Pilot operated check valve 3 reliably and rapidly closes;

Commutation position:

A, move to the right from meta when operation guiding valve 11 makes it, pressure chamber P and active chamber B are communicated with, and active chamber A and oil back chamber T are communicated with, at this moment the fluid of pressure chamber P enters the steel ball cavity of resorption by oil circuit 13, push the epicoele that steel ball 8 enters ball seat 6 open,, finish the rising of the ceding of Taiwan to actuator port B1; Shut-down operation guiding valve 11, guiding valve 11 is got back to meta under the effect of spring, and steel ball 8 falls and seal valve seat 9, stops fluid to reflux, and makes the ceding of Taiwan keep present level;

B,, moves to the left by operation guiding valve 11 from meta when making it, pressure chamber P and active chamber A are communicated with, active chamber B and oil back chamber T are communicated with, and at this moment the fluid of pressure chamber P enters the push rod cavity of resorption by oil circuit, promote push rod 10 and move up, this moment is if the ceding of Taiwan is in running order, the oil pressure reaction of actuator port B1 is on steel ball 8, and when the thrust of push rod 10 surpassed this oil pressure, push rod 10 was pushed steel ball 8 open, fluid in the actuator port B1 flows back to active chamber B by oil circuit 14, and the ceding of Taiwan descends.

Claims

1. multi-way valve with lock, comprise a three position four-way directional control valve, and be arranged on two actuator ports on this change valve, it is characterized in that wherein in the actuator port plug-in type Pilot operated check valve being installed, the epicoele of this Pilot operated check valve ball seat top links to each other with another actuator port with oil circuit on the change valve by being located at the Pilot operated check valve valve pocket, cavity of resorption between Pilot operated check valve steel ball and the push rod links to each other with an active chamber of selector valve with oil circuit on the change valve by being located at the Pilot operated check valve valve pocket, and the push rod cavity of resorption of Pilot operated check valve links to each other with another active chamber of selector valve by the oil circuit that is located on the change valve.