CN2071731U

CN2071731U - Muti-way change valve

Info

Publication number: CN2071731U
Application number: CN 90209287
Authority: CN
Inventors: 国文元; 梁喜武
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-06-30
Filing date: 1990-06-30
Publication date: 1991-02-20

Abstract

The utility model relates to a multi-way change valve. A plurality of radial passages which reach a valve core by passing through a valve bush is arranged on a valve body. The valve core is composed of a drive shaft and a spherical body which can rotate freely around a shaft axis, and an oblique passage is arranged inside the spherical body. The utility model has integrated switching function, and can completely replace a multi-way fluid valve arranged at the aspect of multi-way fluid switching. The utility model has the advantages of simple structure, safe and reliable work, and good economical efficiency. The utility model is particularly suitable for multi-way fluid automatic sampling systems of petrochemical industry production or experiment.

Description

Muti-way change valve

The utility model belongs to valve type, particularly relates to a kind of multiple cross valve that can integrated switching.

At present, multi-path fluid is handled used valve according to entering an equipment certain blanking time successively, be that every road fluid is established valve separately, these valves have pneumatic with electronic, produce or experiment in realize that by the single movement of each valve in these valve sets each road fluid switches.It installs complicated, and is less economical, and maintenance and maintenance are big, and reliability is bad.

The purpose of this utility model is from the Economy of valve and reliability, designs the multiple cross valve that a kind of simple in structure, easily manufactured, safe and reliable single spool drives, thereby replaces the multichannel valve sets.

The utility model is design like this:

Multiple cross valve is by valve body, and the valve gap, valve pad, spool, valve bush and the valve seat that are installed on the valve body are formed.Valve body and valve bush are the cylindrical shell of same axis, are provided with the radial passage that several see through the barrel of valve body and valve bush in axial one suitable parallel position; Valve gap and valve pad are the cylinder that is loaded on valve body one end, and central axis is provided with an axial passage; Spool is to constitute by one section live axle with around the spherical surface body that axis can freely rotate, and establishes a hole that communicates all the time with axial passage, communicates successively with the valve body radial passage in the spherical surface body.

One end of valve body is made the screw thread that is connected with valve gap, and the other end is made the through hole that valve bush is installed, and valve gap is made the screw thread adaptive with valve body, and establishes the nut that drives usefulness in the exterior edge face, with sealing state fixing and the adjustment spool; The shape of spool live axle and size and valve bush endoporus are suitable, and for movingly or transition fit connect; The shape of the protruding land portions of spool and size are suitable with the valve bush concave spherical surface, and surface of contact is a sealing surface structure; The channel position and the quantity of valve bush and valve body are suitable, and the two is the static connection structure; The valve bush valve pad adopts the nonmetallic material corrosion-resistant, wear-resisting, that friction ractor is little.

Working principle of the present utility model is: on the surface of contact of spool and valve bush, be that several lead to the passage outside the valve body on the valve bush face; In the hole of having only one one to communicate on the spool face with axial passage on the valve axis, the running orbit at center, hole, other end circle just with justify identical how much with valve bush face upper channel center.Therefore, when rotational valve core, revolution several angle, the passage on the valve bush face just can communicate with the passage on the spool, and fluid just can flow through from whole valve; Spool turns over several angle again, and the passage on the spool communicates with second passage on the valve bush again; When spool turns over a half of above-mentioned angle, the passage on the spool is just in the middle of two passages on place and the valve bush since surface of contact be sealing surface, then valve cuts out, but Infinite Cyclic is gone down like this.

The utility model has the advantages that significantly: in the multi-path fluid switching controls, the utility model can replace multi-path fluid control valve group fully, make control integrated, and simple in structure, easily manufactured, safe and reliable, the economical of this changing valve, be specially adapted to the multichannel automatic sampling system in petrochemical industry production or the experiment.

Accompanying drawing 1 is a structural representation of the present utility model.

Embodiment: multiple cross valve, shown in figure one, form by valve gap (1), valve pad (2), spool (3), valve bush (4), valve body (5) and the valve seat (6) that is welded on the valve body.Valve body (5) is made tubular, bores 8 radial direction through hole on its parallel of barrel appropriate location, and makes taper pipe thread, so that be connected with the fluid mouth of pipe.Be contained in valve bush (4) in the valve body and also bore the radial direction through hole of equal number, so that fluid enters spool (3) at the valve body openings place.Valve gap (1) and valve pad (2) are loaded on an end of valve body, and the center is opened a through hole and communicated with spool (3).Spool (3) is to drive circular shaft and can constitute around the hemisphere face body that axis freely rotates by one section, on sphere, offer a hole to the centre of sphere, centre of sphere place nose end is communicated with the through hole of valve pad (2), valve gap (1), sphere place nose end communicates with valve bush (4), the arbitrary through hole of valve body (5), in the present embodiment, the spool bore center line becomes 48 degree angles with the spool driving axis.The spool live axle stretches out outside the valve body, so that input power.

The land portions of spool (3) is a convex configuration, and contacted with it is the concave part of valve bush (4), and the shape of the two surface of contact and size are consistent, have selected the sealing configuration tolerance on tolerance for use, prevents to leak.The surface of contact of the drive axle segments of spool (3) and valve bush (4) is for being connected movingly, in order to reducing driving force.Live axle is provided with keyway, so that actuator is installed.For preventing that the loosening passage that causes between valve bush (4) and the valve body (5) from stopping up, and adopted tighter linkage structure in the cooperation of the two.Valve gap (1) adopts fine thread to be connected with valve body (5), and wherein valve gap is an outside thread.The outer end of valve gap is the nut structure profile, and taper pipe thread is made in the center hole outside.Valve pad is made the boss shape slice of cylinder, so that adjust the impacting force of valve core sealed cover.

For reducing the surface friction drag of spool, and consider corrosion factor, the material of valve pad and valve bush adopts ptfe plastic, and other adopts stainless steel.

Present embodiment adopts Pneumatic actuator as progressive power, promptly once drives, and valve core rotation 45 degree switch one the tunnel just, stop the time of one section setting then, the next path that automaticallyes switch again, and circulation is endlessly according to this.

Claims

1, a kind of multiple cross valve, form by valve body (5), the valve gap (1), valve pad (2), spool (3), valve bush (4) and the valve seat (6) that are installed on the valve body (5), it is characterized in that: valve body (5) and valve bush (4) are the cylindrical shells that is provided with several radial passages, and valve gap (1) and valve pad (2) are to be loaded on the cylinder that valve body (5) one ends and center are provided with an axial passage; Spool (3) is to constitute by one section live axle with around the spherical surface body that axis can freely rotate, and establishes a duct that communicates all the time with axial passage, communicates successively with each radial passage in the spherical surface body.

2, multiple cross valve as claimed in claim 1 is characterized in that an end of valve body (5) is made connecting thread, and the other end is provided with through hole.

3, multiple cross valve as claimed in claim 1 or 2 is characterized in that valve gap (1) excircle is made and the suitable screw thread of valve body (5).

4, multiple cross valve as claimed in claim 3, the outer end that it is characterized in that valve gap (1) are nut shape convex partss.

5, multiple cross valve as claimed in claim 1 it is characterized in that the shape of the protruding land portions of spool (3) and size are suitable with valve bush (4) concave spherical surface part, and surface of contact is a sealing surface structure.

6,, it is characterized in that shape, the size of the shape of live axle of spool (3) and size and valve bush (4) endoporus is suitable as claim 1 or 5 described multiple cross valves.

7,, it is characterized in that valve bush (4) is suitable with the channel position and the quantity of valve body (5) as claim 1 or 2 or 3 or 4 or 5 or 6 described multiple cross valves.

8, it is characterized in that as claim 1 or 7 described multiple cross valves valve bush (4), valve pad (2) are to be made by nonmetal.