CN102777670A - Lever valve - Google Patents

Abstract

The invention relates to a lever valve, relates to the technical field of valves, and solves the technical problems that the existing valve is not easy to use. The lever valve comprises a valve body and a valve core arranged in the valve body in a sliding manner. The lever valve is characterized in that the air inlet and the air outlet of the valve body are cut off by a thimble type valve core; the air inlet of the valve core is communicated with the air inlet of the valve body, and the air outlet of the valve core is communicated with the air outlet of the valve body; a valve plug is columnar; the sliding shaft line of the valve plug is coincided with the central shaft line of the valve plug; the top of the valve plug extends out of the valve body; the combining part of the valve plug and the inner wall of the valve body is in a hermetic seal, and the bottom end of the valve plug is over against the thimble of the valve core; the valve body is internally provided with a return spring, the return spring is a telescopic spring, one end of the return spring is abutted against the valve plug, the other end of the return spring is abutted against the valve body, and a telescopic shaft line is coincided with the shaft line of the valve plug; and the top of the valve body is provided with a lever, and the bottom end of a shorter rod part of the lever is abutted against the top end of a column valve core. The lever valve provided by the invention is suitable for gas path control.

Description

Lever valve

Technical field

The present invention relates to the valve technology, particularly relate to a kind of technology of lever valve.

Background technique

The open and close controlling of air valve all drives valve core movement through valve rod and realizes.Existing air valve is when control opens and closes, and the power that acts on valve rod all is directly passed to spool, therefore need apply bigger pushing dynamics to valve rod, could realize the control of air valve switch, uses very inconvenient.

Summary of the invention

To the defective that exists in the above-mentioned existing technology, technical problem to be solved by this invention provides a kind of need and applies less pushing dynamics, can realize valve switch control, lever valve easy to use.

In order to solve the problems of the technologies described above, a kind of lever valve provided by the present invention comprises valve body, and is slidingly mounted on the spool in the valve body;

It is characterized in that: the suction port of said valve body and air outlet are cut off by a centre lathe type valve inside, and the suction port of said valve inside is communicated with the suction port of valve body, and the air outlet of valve inside is communicated with the air outlet of valve body;

Said spool is column, the slip axis of spool and himself central axes, and the top of spool extends the valve body outside, and spool and the hermetic seal of valve interior wall connecting part, and the bottom of spool is over against the thimble of valve inside;

Be provided with a return spring in the said valve body, this return spring is a telescopic spring, and an end of return spring props up spool, and the other end props up valve body, the dead in line of its flexible axis and spool;

The top of said valve body is provided with a lever, and column valve core top is supported in the quarter butt portion bottom of said lever.

Lever valve provided by the invention converts the racking that acts on lever into spool move axially, and opens thereby promote valve inside; During the inoperation lever, spool automatically resets under the effect of returning spring, can valve inside cut out; Amplification through lever; Only less pushing dynamics need be applied, valve switch control can be realized, very easy to use.

Description of drawings

Fig. 1 is the sectional view of the lever valve of the embodiment of the invention.

Embodiment

Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.

A kind of lever valve as shown in Figure 1, that the embodiment of the invention provided comprises valve body 5, and is slidingly mounted on the spool 2 in the valve body 5;

It is characterized in that: the suction port 7 of said valve body 5 is cut off by a centre lathe type valve inside 4 with air outlet 6, and the suction port of said valve inside 4 is communicated with the suction port 7 of valve body 5, and the air outlet of valve inside 4 is communicated with the air outlet 6 of valve body 5;

Said spool 2 is column, the slip axis of spool 2 and himself central axes, and the top of spool 2 extends valve body 5 outsides, and spool 2 and valve body 5 inwall connecting part hermetic seals, and the bottom of spool 2 is over against the thimble 8 of valve inside 4;

Be provided with a return spring 3 in the said valve body 5, this return spring 3 is telescopic springs, and an end of return spring 3 props up spool 2, and the other end props up valve body 5, the dead in line of its flexible axis and spool 2;

The top of said valve body 5 is provided with a lever 1, and column valve core 2 tops are supported in the quarter butt portion bottom of said lever 1.

The working principle of the embodiment of the invention is following:

Under original state, the thimble of valve inside is in the ejection state, and this moment, valve inside was blocked the suction port and the gas circuit between the air outlet of valve body, and valve body is in blocking state;

The stock portion of pushing lever; The quarter butt portion promotion spool of lever is moved towards the valve inside direction; The thimble that makes spool roof pressure valve inside is to the gas circuit conducting that makes valve inside; The suction port and the also conducting thereupon of the gas circuit between the air outlet of valve body at this moment, this moment, valve body was on state, can flow to the air outlet of valve body through valve inside from the pressurized gas of valve body suction port inflow;

, unclamps valve body the pushing force that acts on lever stock portion when being on state; Spool promptly returns back to initial position under the elastic force effect of return spring; The roof pressure power that spool acts on the valve inside thimble also removes thereupon, and the thimble of valve inside also ejects thereupon, makes the gas circuit of valve inside return back to blocking state; This moment, the suction port and the gas circuit between the air outlet of valve body were also blocked thereupon, and valve body also returns back to blocking state thereupon.

Claims (1)

1. a lever valve comprises valve body, and is slidingly mounted on the spool in the valve body;

It is characterized in that: the suction port of said valve body and air outlet are cut off by a centre lathe type valve inside, and the suction port of said valve inside is communicated with the suction port of valve body, and the air outlet of valve inside is communicated with the air outlet of valve body;

Said spool is column, the slip axis of spool and himself central axes, and the top of spool extends the valve body outside, and spool and the hermetic seal of valve interior wall connecting part, and the bottom of spool is over against the thimble of valve inside;

Be provided with a return spring in the said valve body, this return spring is a telescopic spring, and an end of return spring props up spool, and the other end props up valve body, the dead in line of its flexible axis and spool;

The top of said valve body is provided with a lever, and column valve core top is supported in the quarter butt portion bottom of said lever.