CN207298042U - Multistage pilot control valve - Google Patents

Abstract

The utility model discloses a kind of multistage pilot control valve, it is related to pilot valve technical field.Valve chamber is equipped with the piston slided in valve chamber for folding valve port, piston is equipped with groove, groove is equipped with the spool slided along recess sidewall, the side wall of groove and the outer peripheral sidewall of spool, which coordinate to slide spool, to be oriented to, spool is separated out second chamber in groove, piston is separated out first chamber in valve chamber, spool is equipped with the first segment discharge orifice of connection first chamber and second chamber, piston is equipped with the second throttle orifice of connection second chamber and import, piston is equipped with the second centre bore of connection second chamber and outlet, spool is equipped with the first centre bore of connection first chamber and the second centre bore.The load loaded is needed when the utility model can effectively reduce the mode of direct valve opening；So that valve body structure is compacter, the volume smaller of valve body；The stuck situation of valve body can be effectively reduced, reduces the maintenance to valve body and the interference to normal operation so that valve body work efficiency higher.

Description

Multistage pilot control valve

Technical field

It the utility model is related to pilot valve technical field, and in particular to a kind of multistage pilot control valve.

Background technology

Zero pressure difference or the medium from stream mode, small latus rectum generally select direct-acting electromagnetic valve；There are pressure differential before and after valve, greatly Latus rectum then selects guide electromagnetic valve.

Existing valve has throttle clearance between piston valve core and valve opening, and existing throttle clearance size is smaller, By the way that during rubbish pollution thing, pollutant is easily blocked in throttle clearance so that piston valve core can not be in valve in the fluid of valve body Normally moved up and down in hole, influence the normal use of valve so that valve can only use in the pipe-line system of pure fluid, make The smaller scope of application of valve is obtained, have impact on the applicability of valve.

Utility model content

In view of the deficiencies of the prior art, the utility model discloses a kind of multistage pilot control valve, can solve existing valve The problem of throttle clearance easily blocks.

In order to achieve the above object, the utility model is achieved by the following technical programs：

Multistage pilot control valve, including valve seat, valve seat are equipped with valve chamber and the inlet and outlet that is connected with valve chamber, in valve chamber The piston slided in valve chamber for folding valve port is equipped with equipped with valve port, in the valve chamber, piston is equipped with groove, is equipped with groove The spool slided along recess sidewall, the side wall of groove and the outer peripheral sidewall of spool, which coordinate to slide spool, to be oriented to, and spool exists It is separated out second chamber in groove, piston is separated out first chamber in valve chamber, and spool is equipped with connection first chamber and second chamber First segment discharge orifice, piston are equipped with the second throttle orifice of connection second chamber and import, and piston is equipped with connection second chamber and outlet The second centre bore, the second seal for the second centre bore of folding is equipped with second chamber, spool is equipped with the first chamber of connection Room and the first centre bore of the second centre bore, the interior first seal being equipped with for the first centre bore of folding of first chamber.

Preferably, first centre bore is reducing hole, and opening diameter of first centre bore close to outlet is more than in first Opening diameter of the heart hole away from outlet.During fluid is from the first cavity to output flow, the diameter of the first centre bore is slowly Increase so that fluid flows more smooth, ensure that during opening piston be not in interim card, improves valve body work Reliability.

Preferably, second centre bore is reducing hole, and opening diameter of second centre bore close to outlet is more than in second Opening diameter of the heart hole away from outlet.During fluid is from the second cavity to output flow, the diameter of the first centre bore is slowly Increase so that fluid flows more smooth, ensure that during opening piston be not in interim card, improves valve body work Reliability.

Preferably, it is straight to be more than opening of first centre bore close to outlet for opening diameter of second centre bore away from outlet Footpath.During fluid is from the first cavity to output flow, successively by the first centre bore, the second cavity and the second centre bore, First centre bore slowly increases to the diameter of the second centre bore so that fluid flows more smooth, ensure that and opens piston During be not in interim card, improve valve body work reliability.

Preferably, the valve seat, which is equipped with, makes the actuator that spool is slided to import, and actuator includes core iron and is located at core iron The coil in outside, core iron are driven by coil and are slided in valve seat.Drive core iron to move up and down by coil, realize to spool Control, and then the opening and closing of control piston, work efficiency is high, is swift in response, improves the work efficiency of valve body.

Preferably, being equipped with the second chamber makes first elastic component of the spool to the reverse slide of import, the first elasticity One end connection spool of part, the other end connection piston of the first elastic component.First elastic component and fluid collective effect on spool, So that spool, in opening process, reaction is rapider, is not in the situation of interim card, reliable journey during valve body work is added Degree, and the first elastic component is located at the volume that will not increase valve body in valve body, does not interfere with the compactness of valve body.

Preferably, being equipped with the valve chamber makes second elastic component of the piston to the reverse slide of import, the second elastic component One end connects piston, the other end connecting valve seat of the second elastic component.Second elastic component and fluid collective effect are on piston so that For piston in opening process, reaction is rapider, is not in the situation of interim card, adds degree of reliability during valve body work, And the second elastic component is located at the volume that will not increase valve body in valve body, the compactness of valve body is not interfered with.

The utility model discloses a kind of multistage pilot control valve, by setting the spool that can be slided in piston guiding simultaneously Band piston opens or closes valve port, and the load loaded is needed when can effectively reduce the mode of direct valve opening, reduces valve opening When the power that applies so that electromagnetic coil minimizes, and reduces the volume of valve body so that valve body minimizes；Pass through the groove in piston Slip to spool guides, without increasing framework so that valve body structure is compacter, the volume smaller of valve body；Pass through section Discharge orifice replaces traditional throttle clearance, can effectively avoid occurring causing seizure of piston during impurity in fluid, valve body can not be normal The problem of work, reduce the stuck situation of valve body, reduces the maintenance to valve body and the interference to normal operation so that valve body Work efficiency higher.

Brief description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other attached drawings can also be obtained according to these attached drawings.

Fig. 1 is the schematic cross-sectional view of the utility model embodiment；

Fig. 2 is the partial enlargement structural representation of the utility model embodiment.

1, valve seat in figure, 2, valve chamber, 3, import, 4, outlet, 5, valve port, 6, piston, 7, groove, 8, spool, the 9, second chamber Room, 10, first chamber, 11, first segment discharge orifice, the 12, second throttle orifice, the 13, second centre bore, 14, second seal, 15, One centre bore, 16, first seal, 17, core iron, 18, coil, the 19, first elastic component, the 20, second elastic component.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, those of ordinary skill in the art's all other embodiments obtained without making creative work, belongs to The scope of the utility model protection.

As shown in Figure 1 to Figure 2, multistage pilot control valve described in the utility model embodiment, including valve seat 1, lead in valve seat 1 The mode for crossing machining offers valve chamber 2 and the import 3 connected with valve chamber 2 and outlet 4, and import 3 and the opening of outlet 4 are equal On the lateral wall of valve seat 1, for being fed and being excluded fluid into valve seat 1.Also pass through the side of machining in valve chamber 2 Formula offers valve port 5, and the piston 6 that can be slided in valve chamber 2 for folding valve port is provided with valve chamber 2, and piston 6 passes through cutting The mode of processing opens up fluted 7, and the spool 8 along 7 side walls of groove, side wall and the spool 8 of groove 7 are provided with groove 7 Outer peripheral sidewall coordinate slip to spool 8 to be oriented to, guide spool 8 slides in piston 6.

Spool 8 is separated out second chamber 9 in groove 7, and second chamber 9 is collectively forming by piston 6 and spool 8, and piston 6 is in valve First chamber 10 is separated out in chamber 2, first chamber 10 is collectively forming by valve seat 1 and spool 8, and spool 8 is by way of machining Offer the first segment discharge orifice 11 of connection first chamber 10 and second chamber 9, the company of offering by way of machining of piston 6 Logical second chamber 9 and the second throttle orifice 12 of import 3, piston 6 offer connection 9 He of second chamber by way of machining Second centre bore 13 of outlet 4, valve seat 1, which is equipped with, makes the actuator that spool 8 is slided to import 3, and actuator includes core iron 17 and sets Coil 18 in the outside of core iron 17, core iron 17 are driven by coil 18 under the action of electromagnetic induction and slided, in first chamber 10 Equipped with the first seal 16 for the first centre bore of folding 15, first seal 16 is welded on the lower end of core iron 17, alternatively, the One seal 16 is integrally formed with core iron 17, and the second seal 14 for the second centre bore of folding 13 is equipped with second chamber 9, Second seal 14 is welded on the lower end of spool 8, alternatively, second seal 14 is integrally formed with spool 8, spool 8 passes through cutting The mode of processing offers the first centre bore 15 of connection 10 and second centre bore 13 of first chamber.Wherein actuator is except electromagnetism Can also be the other modes such as manual outside mode.

First centre bore 15 is reducing hole, and opening diameter of first centre bore 15 close to one end of outlet 4 is more than in first The opening diameter of the one end of heart hole 15 away from outlet 3, the second centre bore 13 are reducing hole, and the second centre bore 13 is close to outlet 4 The opening diameter of one end is more than the diameter of one end of the second opening of the centre bore 13 away from outlet 4.Second centre bore 13 is away from going out The diameter of one end of the opening of mouth 4 is more than opening diameter of first centre bore 15 close to one end of outlet 4.

Being equipped with second chamber 9 makes first elastic component 19 of the spool 8 to the reverse slide of import 3, and the first elastic component 19 is Compression spring, the first elastic component 19 are installed on the end of spool 8 and the end face of piston 6.Being equipped with valve chamber 2 makes piston 6 to the anti-of import 3 To the second elastic component 20 of slip, the second elastic component 20 is also compression spring, one end of the second elastic component 20 and the end of piston 6 or Sidewall weld, the other end and the valve seat 1 of the second elastic component 20 weld.

The course of work divides air-tight state and connected state.

Under air-tight state, piston 6 is closed with valve port 5, and fluid is flowed into from import 3, passes sequentially through the second throttle orifice 12 and One throttle orifice stream 11 enters second chamber 9 and first chamber 10, and the pressure of 9 both sides fluid of first chamber 10 and second chamber keeps flat Weighing apparatus, piston 6 and 8 transfixion of spool.

Under connected state, core iron 17 is raised above under the action of 18 electromagnetic induction of coil, and the first of 17 end of core iron is close Sealing 16 is separated with the first centre bore 15, and the first centre bore 15 is connected with first chamber 10, and the fluid in first chamber 10 is successively By the first centre bore 15 and the second centre bore 13 flow direction outlet 4, the pressure of 8 both sides fluid of spool changes, first chamber Pressure in 10 is less than the pressure in second chamber 9, and spool 8 slides up under the action of oil liquid pressure and the first elastic component 19 Dynamic, second seal 14 follows core to move up, and opens the second centre bore 13.Second centre bore 13 is opened, and second chamber 9 is with going out Mouth 4 connects, and the fluid in second chamber 9 changes to the flowing of outlet 4, the pressure of 6 both sides of piston, the pressure in second chamber 9 Power is less than the pressure of import, and piston 6 upward sliding, piston 6 under the action of oil liquid pressure and the second elastic component 20 divide with valve port 5 From valve chamber is opened.

The utility model discloses a kind of multistage pilot control valve in summary, by setting the valve that can be slided in piston Core guides and is opened with piston or close valve port, and the load loaded is needed when can effectively reduce the mode of direct valve opening, Reduce the power applied during valve opening so that electromagnetic coil minimizes, and reduces the volume of valve body so that valve body minimizes；Pass through piston Slip of the interior groove to spool guides, without increasing framework so that valve body structure is compacter, and the volume of valve body is more It is small；Traditional throttle clearance is replaced by throttle orifice, can effectively avoid occurring causing seizure of piston, valve body during impurity in fluid The problem of can not working normally, reduce the stuck situation of valve body, reduces the maintenance to valve body and the interference to normal operation, So that valve body work efficiency higher.

It should be noted that herein, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those Element, but also including other elements that are not explicitly listed, or further include as this process, method, article or equipment Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that Also there are other identical element in process, method, article or equipment including the key element.

Above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to foregoing reality Example is applied the utility model is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to preceding State the technical solution described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and model of various embodiments of the utility model technical solution Enclose.

Claims (7)

1. multistage pilot control valve, including valve seat, valve seat is equipped with valve chamber and the inlet and outlet connected with valve chamber, is set in valve chamber There is valve port, it is characterised in that：The piston slided in valve chamber for folding valve port is equipped with the valve chamber, piston is equipped with groove, The spool slided along recess sidewall is equipped with groove, the side wall of groove and the outer peripheral sidewall of spool, which coordinate to slide spool, to be led Second chamber is separated out in groove to, spool, and piston is separated out first chamber in valve chamber, and spool is equipped with connection first chamber and the The first segment discharge orifice of two chambers, piston are equipped with the second throttle orifice of connection second chamber and import, and piston is equipped with the second chamber of connection Room and the second centre bore of outlet, the interior second seal being equipped with for the second centre bore of folding of second chamber, spool, which is equipped with, to be connected First centre bore of logical first chamber and the second centre bore, interior the first sealing being equipped with for the first centre bore of folding of first chamber Part.

2. multistage pilot control valve as claimed in claim 1, it is characterised in that：First centre bore is reducing hole, in first Opening diameter of the heart hole close to outlet is more than opening diameter of first centre bore away from outlet.

3. multistage pilot control valve as claimed in claim 1, it is characterised in that：Second centre bore is reducing hole, in second Opening diameter of the heart hole close to outlet is more than opening diameter of second centre bore away from outlet.

4. multistage pilot control valve as claimed in claim 1, it is characterised in that：Opening of second centre bore away from outlet is straight Footpath is more than opening diameter of first centre bore close to outlet.

5. multistage pilot control valve as claimed in claim 1, it is characterised in that：The valve seat, which is equipped with, makes what spool was slided to import Actuator, actuator include core iron and the coil being located on the outside of core iron, and core iron is driven by coil and slided.

6. multistage pilot control valve as claimed in claim 1, it is characterised in that：Being equipped with the second chamber makes spool to import Reverse slide the first elastic component, the first elastic component one end connection spool, the first elastic component the other end connection piston.

7. multistage pilot control valve as claimed in claim 1, it is characterised in that：Being equipped with the valve chamber makes piston to the anti-of import To the second elastic component of slip, one end connection piston of the second elastic component, the other end connecting valve seat of the second elastic component.