CN87211533U

CN87211533U - Multi-functional valve

Info

Publication number: CN87211533U
Application number: CN 87211533
Authority: CN
Inventors: 吴声震
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-07-30
Filing date: 1987-07-30
Publication date: 1988-08-17

Abstract

The utility model discloses a four-function valve combining the throttling function, the stop function, the check function and the safety function into integration. When some parts are reduced, a three-function valve having the throttling function, the stop function and the check function, a three-function valve having the stop function, and the check function and the safety function, and a two-function valve having the stop function and the check function can be obtained. Compared with the publicly known technology, the utility model has the advantages of simple structure, less parts, easy fabrication, light weight, low cost, high reliability, long service life; b; the start and stop moment is small; c; the sealing surface is hard to be worn. Due to the fact that the four-function valve adopts the sealing of the cylindrical surface which changes the sealing of the end surface which is followed for a long term, the long-term usage valve is just like a new valve as long as the sealing ring and the bore of the valve body are changed.

Description

Multi-functional valve

The utility model relates to valve, particularly a kind of multifunction valve.

Valve is industrial being most widely used such as oil, chemical industry, medicine, metallurgy and food.Owing to often need the valve series connection of different purposes is used, and following known technology occurs: by-non-return, throttling-by-non-return and by-non-return-multifunction valves such as safety.But these valves are all based on existing stop valve, therefore, the complex structure of stop valve, open and close that moment is big, sealing surface is easy to wear and easily shortcoming such as leakage kept significantly.

The utility model purpose provide throttling-by-non-return-safety four duty valves and remove the throttling that obtains behind the some of them part-by-non-return, by-non-return-safe triple duty valve with end-non-return two duty valves, to replace existing multifunction valve.

Embodiment of the present utility model is: valve body is by left and right flanges, and straight length and dividing plate are formed (wherein left flange and straight length, right flange and dividing plate can and be one also), and some runners are arranged in the valve body wall, and its total sectional area is comparable to the valve apertures sectional area.Have in the valve body one be similar to piston, end face is the hollow circular cylinder spool of streamline convex surface shape, valve core outer surface has some annular grooves to be used for adorning piston ring or piston ring to add O type circle and realize sealing.When spool rotated gradually, the total sectional area of runner inlet increased thereupon or reduces (throttling) and directly reaches standard-sized sheet or full cut-off (ending) utilizes large and small two pressure springs of pressure to realize non-return and safety valve function respectively.Its unique distinction is to adopt the piston type cylndrical surface to seal and replaces the end face seal that follows for a long time.

Piston ring is adjacent to the cylindrical of ring and valve interior wall by the effect of itself elastic force and pressure medium, the end face and the piston ring groove end face of ring are adjacent to, then having only compressed gap in theory is to sew passage, is called theory and sews cross section (" mechanical engineering manual " 23-86).Its leakage rate, contained according to " piston ring " (25～26 pages) (on join factory through the country translate People's Transportation Press), work as piston diameter 100mm in the motor car engine, piston and cylinder clearance 0.15mm, piston ring gap 0.4mm, then the final outflow area of gas dwindles 770 times approximately.Obviously, when using in valve, as opened gap is reduced to 0.1mm, the then single leakage amount of rushing down can be dwindled 3000 times or more.Therefore, add O type circle again and then obtain better labyrinth effect when increasing number of rings or piston ring.It is to strike off the granule foreign that sticks on the casing wall that piston ring also has an advantage.Piston ring divides two kinds of metal ring and plastic hoops.The fluoroplastic packing ring of existing standard can be in aggressive medium in the plastic hoop.Standard piece O type circle has rubber and plastics two classes.

The utility model is achieved in that in valve body that except that spool also having to have between axle, driving body, spool and the axle has a safety spring between a check spring and axle and the driving body.There are two post Xiao of symmetry to expose outside two elongated slots on the valve body, within the driving wheel internal thread on the driving wheel and the formation of the outside thread on valve body power screw pair on the driving body.If valve is in connection.But be not fully open position, because the effect of check spring, spool still is in the runner hole of covering entry end.When medium entered the valve body entry end, the pressure of medium used spool to be compressed with its interior check spring to expose the runner hole, medium just enter runner to the outlet end of valve body in pipeline.When adopting the moving rotating drive of hand (or electricity, gas and liquid) to take turns, the power screw side effect is moved along the valve body elongated slot in post Xiao, so driving body, safety spring, axle, check spring and spool move the total sectional area that increases the runner hole, demonstrate the throttling function of valve this moment, indicates amount of restriction by the indication nameplate that is contained on the valve body.Being rotated further driving wheel ends until standard-sized sheet.If this moment, the loine pressure superelevation just made safety spring be compressed, promptly spool is pushed and exposes discharge orifice, thereby has reduced the overvoltage of pipeline.Should stagger with runner in the position of discharge orifice on the valve body and two elongated slots.

The utility model has the advantages that: 1. simple in structure, easy to manufacture, in light weight and cost is low; 2. it is little to open and close moment; 3. sealing surface is not easy to wear, sealing is reliable; 4. long service life; 5. easy to maintenance.

In conjunction with the accompanying drawings model utility is added description in detail now.

The structural principle sectional view of Fig. 1, set section stream-end-non-return-safety four duty valves is if the indication nameplate (5) that removes wherein just obtains ending-non-return-safe triple duty valve.

Fig. 2, be that Fig. 1 four duty valves remove the throttling that obtains behind wherein mandrel (2), safety spring (8) and the discharge orifice-by-non-return triple duty valve schematic representation.If removing (5) again is to end-non-return two duty valves.

Can and be one with reference to Fig. 1, valve body (1) by left flange a and straight length b() and right flange d can and be one with dividing plate c() form.In the wall of valve body (1) some runners are arranged, its total sectional area is close with the aperture sectional area.End at straight length b has outside thread and driving wheel (7) to constitute the slip that secondary and symmetrical two elongated slots of power screw limit post Xiao (6) on the driving body (4).One discharge orifice is arranged on the straight length b, and spool (3) endoporus is equipped with a check spring (9), and a safety spring (8) is housed in the driving body (4), and mandrel (2) is housed between (9) and (8).Seal ring (10) is housed, as piston ring or piston ring and O type circle on the piston valve core (1).

When medium enters entry end, the pressure of medium promotes spool (3) (check spring this moment (9) by compression), expose the runner hole, medium just enters runner to outlet, is positioned indication nameplate (5) position from driving wheel (7) and indicates amount of restriction (5) to be contained on valve body (1) the straight length b.When rotating drive wheel (7), the sectional area in runner hole increases, and its flow also increases, until standard-sized sheet.When loine pressure was too high, safety spring (8) was compressed, and exposed the discharge orifice on valve body (1) the straight length b so spool is pushed, and crossed piezodielectric and emitted from discharge orifice, had realized the pipeline overvoltage protection.

When being applied to aggressive medium, multifunction valve adopts corresponding corrosion-resistant metal materials or plastics or metal to contain the corrosion-resistant plastic layer.

Claims

A kind of multifunction valve that mainly is made of valve body, spool, seal ring, spring and drive unit is characterized in that:

(a) in the wall of the valve body of forming by left flange a and straight length b (can and being one) and right flange d and dividing plate c (can and be one) [1] some runners are arranged, its total sectional area is close with the aperture sectional area, and the slip of post Xiao [6] on outside thread and driving wheel [7] the formation secondary and symmetrical two elongated slots qualification driving bodies of power screw [4] is arranged at the end of straight length b;

(b) spool [3] be one be similar to piston, end face is the hollow circular cylinder of streamline convex surface shape, its outer surface has some annular grooves, and seal ring [10] is housed on the annular groove

(c) on the straight length b discharge orifice is arranged, a check spring [9] is housed in the spool [3], a safety spring [8] is housed in the driving body [4], between check spring [9] and the safety spring [8] mandrel [2] is housed;

(d) indication nameplate [5] is housed on the straight length b.