CN2755379Y

CN2755379Y - High and low pressure switch rotary valve

Info

Publication number: CN2755379Y
Application number: CN 200420098485
Authority: CN
Inventors: 尹人奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-19
Filing date: 2004-11-19
Publication date: 2006-02-01
Anticipated expiration: 2014-11-19

Abstract

The utility model relates to a high and low pressure switch rotary valve. In particular, the high and low pressure switch rotary valve is used for switching high and low pressure for mechanical double oil cylinders of a pumping machine used for concrete, ash (sand), plasm, channel cleanout, etc., and the utility model belongs to the technical field of a hydraulic fluid pressure switch valve. The utility model is mainly composed of a valve body, valve cores O-shaped sealing rings, a left and a right end covers, connecting bolts and a handle and is provided with three sets of oil ports. Each set of oil ports is provided with two oil ports, wherein the two oil ports of one set are communicated with oil inlet and returning pipes of circuit oil passages. Additionally, two sets of oil ports are respectively communicated with the oil ports of a rod cavity and a rodless cavity of two oil cylinders to complete the switch of the high and low pressure. The handle needs to be only switched on two positions, such as 0 and 90 DGE (adjacent two sets of the oil ports of three oil ports corresponding to the side surface of the valve body are separated with 90 DGE); or the handle is switched on three positions, such as 0, 120 and 240 DGE (the adjacent two sets of the oil ports of three oil ports corresponding to the side surface of the valve body are separated with 120 DGE). The utility model has the advantages of simple structure, convenient operation, environmental protection, no pollution of the inner part of a hydraulic system, etc.

Description

A kind of high low pressure switches stopcock

One, technical field

The utility model relates to a kind of high low pressure switching valve, and the two oil cylinder high low pressures switchings in particular for machine pumping machines such as concrete, ash (sand) slurry, channel cleanouts belong to hydraulic fluid pressure changing valve technical field.

Two, background technique:

Domestic existing technical scheme mainly contains following three kinds of structural types: a kind of is the oil pipe that directly exchanges rod chamber rodless cavity on the pumping mechanism master cylinder, this mode is simple, the pressure loss is little, shortcoming is to need the dismounting oil connection, easily cause fluid loss befouling environment and hydraulic system internal contamination, frequently switching excessive fuel consumption wastes time and energy; Second kind is to install the polylith valve plate additional at pumping mechanism two master cylinder afterbodys, need dismantle valve piece cover plate when high low pressure switches, transposing cover plate direction, and same the existence gone up a kind of shortcoming; The third is that sharp six logic cartridge valves, solenoid directional control valve and the long-pending very high valve seat of big requirement on machining accuracy of a block realize that automatic high low pressure switches, and this mode involves great expense, inconvenient maintenance.

Three, the content of model utility:

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, and provides a kind of simple in structure, and is cheap, and no fluid runs off, and handover operation conveniently high low pressure switches stopcock

For achieving the above object, the utility model is achieved in that a kind of high low pressure switches stopcock, mainly comprise the valve body that is provided with left and right end cap, be provided with a center through hole that is used for installing cylindrical spool in the inside of valve body, one end of spool is connected with handle, its special way is in side of valve body three groups of hydraulic fluid ports are arranged, two every group; Each hydraulic fluid port on the side all connects with center through hole.

According to different needs, above-mentioned valve body can be designed to quadrangular or six prisms or cylindrical body.

When valve body is quadrangular, be separated by 90 ° for two groups that three groups of hydraulic fluid ports on its side are whenever adjacent; The spool cylndrical surface is provided with four kidney slots, and wherein two grooves are along the cylndrical surface generatrix direction, in addition two groove vertical cylinder shaft axiss; Handle can only be 0 ° and 90 ° of two positions conversions.

When valve body is six prisms, be separated by 120 ° for two groups that three groups of hydraulic fluid ports on its side are whenever adjacent; The cylndrical surface of spool is provided with three kidney slots, and wherein a groove is along the cylndrical surface generatrix direction, in addition two groove vertical cylinder shaft axiss; Handle can come back rotation on any adjacent two positions, 0 °, 120 °, 240 ° three positions.

When valve body is cylindrical body, be separated by 90 ° or 120 ° for two groups that three groups of hydraulic fluid ports on its side are whenever adjacent.

Compared with the prior art the utility model has simple in structurely, cheap, and no fluid runs off, free from environmental pollution and hydraulic system, the also very convenient advantage such as quick of handover operation.

Four, description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is that A-A among Fig. 1 is to sectional view.

Fig. 3 is the schematic representation of spool half-twist among Fig. 1.

Fig. 4 is the sectional view of valve body 2;

Fig. 5 is that B-B among Fig. 4 is to sectional view;

Fig. 6 is the spool plan view;

Fig. 7 is the C-C sectional view of spool;

Fig. 8 is the operating on low voltage state;

Fig. 9 is the high-pressure work state.

Five, embodiment:

For better understanding the utility model, it is described in further detail below in conjunction with drawings and Examples.

With reference to Fig. 1-Fig. 9 as seen, high low pressure described in the utility model switches stopcock mainly to be made up of valve body 2, spool 3, left end cap 1, right end cap 5, connecting bolt 6 and handle 7, and there are three groups of hydraulic fluid ports the side of valve body 2, two every group; In the valve body 2, between the both ends of the surface a columniform center through hole is arranged, columniform spool 3 is installed in it, and is fixed in the valve body, " O " shape seal ring 4 is housed between the two ends of spool and the valve body by connecting bolt 6, one end of spool 3 links to each other with handle 7, and can rotate thereupon; Each hydraulic fluid port on the valve body side all connects with center through hole.

According to different needs, valve body 2 can be designed to any one in quadrangular, six prisms, the cylindrical body, when valve body 2 is designed to quadrangular, be separated by 90 ° between every adjacent two groups of three groups of hydraulic fluid ports on its side, in this case, the cylndrical surface of spool 3 is provided with four kidney slots, and wherein two grooves are along the cylndrical surface generatrix direction, two groove vertical cylinder shaft axiss in addition, this moment, handle 7 can only be changed 0 ° and 90 ° of two positions; When if valve body 2 is six prisms, be separated by 120 ° between every adjacent two groups of three groups of hydraulic fluid ports on its side, in this case, the cylndrical surface of spool 3 is provided with three kidney slots, one of them groove is along the cylndrical surface generatrix direction, two groove vertical cylinder shaft axiss in addition, the handle 7 of this moment can come back rotation on any adjacent two positions, 0 °, 120 °, 240 ° three positions; If valve body 2 is when be cylindrical body, being separated by between whenever adjacent two groups of three groups of hydraulic fluid ports on its side can be 90 °, also can be 120 °.

When operating on low voltage, as shown in Figure 8, oil inlet pipe P, return tube T connect by the internal oil passages of stopcock and the rod chamber of two oil cylinders, and the rodless cavity of two oil cylinders directly communicates by inner another oil circuit of stopcock, and pumping mechanism is in the operating on low voltage state;

When switching to high-pressure work, handle is rotated 90 ° together with core, the stopcock core is in Fig. 9 position, at this moment oil inlet pipe P, return tube T connect by the internal oil passages of stopcock and the rodless cavity of two oil cylinders, the rod chamber of two oil cylinders directly communicates by inner another oil circuit of stopcock, and pumping mechanism is in the high-pressure work state;

When need switch back operating on low voltage again, only need can get back to operating on low voltage state recited above with handle together with 90 ° of core reverse turns.

Convenient and flexible operation, environmental protection and do not cause the hydraulic system internal contamination, cost is low, and is economical and practical.

Claims

1, a kind of high low pressure switches stopcock, mainly comprise the valve body (2) that is provided with left end cap (1) and right end cap (5), the inside of valve body (2) is provided with a center through hole that is used for installing cylindrical spool (3), one end of spool (3) is connected with handle (7), it is characterized in that: there are three groups of hydraulic fluid ports the side of valve body (2), two every group; Each hydraulic fluid port on the side all connects with center through hole.

2, a kind of high low pressure according to claim 1 switches stopcock, it is characterized in that: when valve body (2) was quadrangular, three groups of hydraulic fluid port two adjacent groups on its side were separated by 90 °; Spool (3) cylndrical surface is provided with four kidney slots, and wherein two grooves are along the cylndrical surface generatrix direction, in addition two groove vertical cylinder shaft axiss; Handle (7) can only be 0 ° and 90 ° of two positions conversions.

3, a kind of high low pressure according to claim 1 switches stopcock, it is characterized in that: when valve body (2) was six prisms, three groups of hydraulic fluid port two adjacent groups on its side were separated by 120 °; The cylndrical surface of spool (3) is provided with three kidney slots, and wherein a groove is along the cylndrical surface generatrix direction, in addition two groove vertical cylinder shaft axiss; Handle (7) can come back rotation on any adjacent two positions, 0 °, 120 °, 240 ° three positions.

4, a kind of high low pressure according to claim 1 switches stopcock, it is characterized in that: when valve body (2) was cylindrical body, three groups of hydraulic fluid port two adjacent groups on its side were separated by 90 ° or 120 °.