CN103122883A - Adjustable pilot reducing valve - Google Patents
Adjustable pilot reducing valve Download PDFInfo
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- CN103122883A CN103122883A CN201110367759XA CN201110367759A CN103122883A CN 103122883 A CN103122883 A CN 103122883A CN 201110367759X A CN201110367759X A CN 201110367759XA CN 201110367759 A CN201110367759 A CN 201110367759A CN 103122883 A CN103122883 A CN 103122883A
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Abstract
The invention discloses an adjustable pilot reducing valve. In order to overcome the defects that an opening device of an existing reducing valve is easy to damage when through impacts and noise is high, the invention provides a reducing valve, wherein a differential pilot valve is adopted, a first containing cavity communicated with an oil inlet of the pilot valve is formed in one side of the pilot valve, a second containing cavity communicated with the first containing cavity through an oil way is formed in the other side of the pilot valve, a pilot valve core is arranged inside a pilot valve seat in a sliding mode, a pyramid portion of the pilot valve core is located inside the first containing cavity and connected with a buffer spring, a pressure adjusting spring and a screw adjusting mechanism are arranged on one side of the second containing cavity, a gap between the pilot valve seat and the pilot valve core, a radial through hole and an oil outlet compose a leakage oil way opened by the pilot valve, and opening pressure is convenient to adjust through the screw adjusting mechanism. According to the adjustable pilot reducing valve, the differential pilot valve, the invert-installed pilot valve core, the pilot valve seat capable of moving along an axial direction and the pilot valve core are utilized to reduce impact force when the pilot valve is closed, the pilot valve core is enabled to be always in a stable state, so that the adjustable pilot reducing valve has the advantages of being small in pilot valve impact, long in service life, stable and low in noise and easy to adjust.
Description
Technical field
The present invention relates to the adjustable guide's reduction valve in the hydraulic element of hydraulic system, particularly hydraulic system.
Technical background
Reduction valve is pressure control valve commonly used in hydraulic system, is a kind of pressure regulator valve, is commonly used for and stablizes the oil circuit working pressure.Existing reduction valve is different with working principle by structure, can be divided into direct acting pressure and piloted reducer.And the piloted reducer use is especially extensive.
In existing piloted reducer, guide valve seat is fixed, pilot valve cone (also claiming guide valve core) withstands on guide valve seat by pressure adjusting spring, the filler opening of pilot valve is communicated with the Returnning spring chamber of reduction valve main valve plug, the low pressure oil outlet port of Returnning spring chamber and reduction valve is communicated with by throttle orifice, and the pressure adjusting spring chamber of pilot valve is and the hydraulic oil container circuit communication.When the pressure in reduction valve low pressure oil outlet port during lower than the set pressure of pressure adjusting spring, pilot valve is in closed condition, the pressure in low pressure oil outlet port equals the pressure in the Returnning spring chamber, main valve plug move under the elastic force effect of Returnning spring and the high pressure oil entrance that increases reduction valve to the oil circuit valve port opening in low pressure oil outlet port, improve the flow of the hydraulic oil that enters into the low pressure oil outlet port and improve the pressure in low pressure oil outlet port; When the pressure in low pressure oil outlet port during higher than the set pressure of pilot valve pressure adjusting spring, pilot valve is opened the pressure in Returnning spring chamber is reduced rapidly, main valve plug is at the effect lower compression Returnning spring of high pressure oil and move, reduce from the high pressure oil ingress to the valve port opening of the oil circuit in low pressure oil outlet port, and then reduce the flow that enters into the low pressure oil outlet port and reduce the pressure in low pressure oil outlet port.
Owing to there being a plurality of hydraulic actuators in hydraulic system, whether the work of these hydraulic actuators can cause the fluctuation of system pressure, and pilot valve is the also open and close continually along with the fluctuation of system liquid pressure pressure of pressure at stabilizing low voltage oil export place.And in existing piloted reducer, guide valve seat is fixed, when pilot valve cuts out, the pilot valve cone can impact guide valve seat under the promotion of pressure adjusting spring, and pilot valve opens and closes continually, makes also to exist frequently between pilot valve cone and guide valve seat to impact, guide valve seat and pilot valve cone are also fragile because impacting frequently, cause the life-span of reduction valve low, when pilot valve was opened simultaneously, the pilot valve cone was in vacant state, easy and valve seat collides and causes very large noise, has increased the noise radiation of machine.
Summary of the invention
The object of the invention is to pilot valve for existing piloted reducer be hit large and fragile, the life-span is short, and pilot valve guide valve core when opening is in the shortcoming that quick condition easily produces vibration and utters long and high-pitched sounds, and provide a kind of good stability, noise is little, adjustable guide's reduction valve that the low pressure oil outlet pressure of long service life is adjustable.
Technological scheme of the present invention is achieved in that a kind of adjustable guide's reduction valve of structure, and it comprises main valve and the main valve opening device that is fixedly connected with main valve, and main valve comprises main valve body, and main valve body is provided with main valve plug chamber, high pressure filler opening, low pressure oil outlet; The main valve plug that in the main valve plug chamber, setting can be moved therein vertically, one end of main valve plug is connected with Returnning spring, main valve plug is provided with the epicoele with the main valve plug adjacency in the same side of Returnning spring, epicoele is the control chamber that main valve plug is opened, when upper cavity pressure reduces certain value, being subjected to force unbalance of main valve plug both sides and upwards cavity direction move.Described main valve plug is along with it moves and change valve port opening from the high pressure filler opening to the low pressure oil outlet along its axial direction in the main valve plug valve pocket.the main valve opening device comprises a valve body, establish a valve pocket in valve body, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume, opposite side has the second cavity volume, the first cavity volume is communicated with epicoele, the first cavity volume detects oil circuit by oil pressure and is communicated with the low pressure oil outlet, detect on oil circuit at oil pressure and be provided with the main valve throttle orifice, , liquid effects acts on axial area on pilot valve in the axial area on pilot valve greater than the second intracavity liquid in the first cavity volume, be provided with oil circuit between the chamber that is communicated with the first cavity volume and the second cavity volume in pilot valve, pilot valve comprises guide valve core and guide valve seat, guide valve seat and valve pocket inwall sliding fit, guide valve seat is provided with one and axially connects the pilot valve hole of guide valve seat, guide valve core comprises the guide portion of head, the tapering of afterbody, the joint that connects guide portion and tapering, guide portion and described pilot valve hole sliding fit, has the pilot valve gap between joint and pilot valve hole hole wall, the tapering is positioned at the first cavity volume, when the tapering disengages with point limit, pilot valve hole, the first cavity volume is communicated with the pilot valve gap, guide valve seat is provided with the radial direction through hole that is communicated with the pilot valve gap, valve body is provided with the pilot valve oil outlet that is communicated with radial direction through hole, be provided with damping spring in the first cavity volume, one end of damping spring is connected with the valve body contact, the other end is connected with the tapering contact of guide valve core, the guide spool applies towards the elastic force of the second cavity volume direction, establish pressure adjusting spring and controlling device in the second cavity volume side, one end of pressure adjusting spring is connected with the guide valve seat contact, the contact of the other end and valve body is connected, controlling device make guide valve core to the shift motion of the second cavity volume direction less than guide valve seat to the second cavity volume direction shift motion and can regulate guide valve core stroke final position.
The working principle of the adjustable guide's reduction valve of the present invention is as follows: when the pressure at low pressure oil outlet place during not higher than the pilot valve cracking pressure of reduction valve, the first cavity volume of pilot valve, the epicoele of main valve have identical pressure with low pressure oil outlet place, main valve plug is subjected to the effect of hydraulic oil in Returnning spring, epicoele, low pressure oil outlet place hydraulic oil and keeps stress balance, constant to the gap size of low pressure oil outlet from the high pressure filler opening, keeping the pressure at low pressure oil outlet place is certain value.
when the pressure of low pressure oil outlet raises gradually, the axially loaded area that is positioned at the first cavity volume due to pilot valve is positioned at the axially loaded area of the second cavity volume greater than pilot valve, the active force increase value that hydraulic oil in the first cavity volume acts on pilot valve acts on active force increase value on pilot valve greater than hydraulic oil in the second cavity volume, when the pressure in the first cavity volume reaches the set pressure of opening device, hydraulic oil in the first cavity volume and damping spring to the active force of pilot valve greater than hydraulic oil and the pressure adjusting spring active force to pilot valve in the second cavity volume, make pilot valve move (hydraulic oil of the second cavity volume also flows to the first cavity volume by oil circuit between the chamber) to the second cavity volume, when guide valve core contacts with controlling device, guide valve core stops mobile, guide valve seat continues to move to the direction of the second cavity volume, the valve opening of the tapering of guide valve core and guide valve seat point limit disengages at this moment, the first cavity volume is communicated with the pilot valve gap, hydraulic oil in the first cavity volume is by the pilot valve gap, radial direction through hole, the pilot valve oil outlet flows out the first cavity volume, pressure in the first cavity volume is reduced rapidly, thereby reduce the interior pressure of epicoele of the main valve plug that is connected with the first cavity volume, make the main valve plug cavity direction that makes progress move, gap from the high pressure filler opening to the low pressure oil outlet reduces, also namely reduced valve port opening, make the pressure decreased of low pressure oil outlet.during the set pressure of closing to opening device when the pressure decreased in the first cavity volume, hydraulic oil in the first cavity volume and damping spring to the axial force of pilot valve less than hydraulic oil and the pressure adjusting spring axial force to pilot valve in the second cavity volume, guide valve seat moves to the first cavity volume direction under the effect of pressure adjusting spring, the valve opening point limit of guide valve seat is contacted with the conical surface in the tapering of guide valve core, disconnection is from the oil circuit in the first cavity volume and pilot valve gap, make the boost in pressure of the first cavity volume and epicoele, main valve plug again reaches stress balance and keeps current location, the valve port opening of maintenance from the high pressure filler opening to the low pressure oil outlet, also namely keep the pressure of low pressure oil outlet.In the present invention, regulate the stroke of guide valve core by controlling device, also namely regulate guide valve core and contact the reduction length that when namely pilot valve is opened when spacing, pressure adjusting spring is compressed by guide valve seat with controlling device, also namely regulate the cracking pressure that the elastic force of pressure adjusting spring when pilot valve is opened realizes regulating this opening device, namely regulate the pressure at low pressure oil outlet place.The guide valve core of the pilot valve of the present invention by differential type, upside-down mounting is the measures such as the guide valve core side that is arranged on the pilot valve oil-feed, damping spring, axially movable guide valve seat and guide valve core impact forces when reducing pilot valve and closing, and make guide valve core be in all the time a steady state, impact the advantage little, that the life-span is long, noise is low to realize this pilot valve.
In the present invention, be provided with the pilot valve throttle orifice between the chamber on oil circuit, in the process that pilot valve cuts out, pressure adjusting spring promotes guide valve seat and moves to the first cavity volume direction, and the volume of the second cavity volume increases, and hydraulic oil flows to the second cavity volume by oil circuit between the chamber from the first cavity volume, owing to being provided with throttle orifice on oil circuit between the chamber, the hydraulic oil that is by convection in the second cavity volume has damping function, therefore can slow down the speed that guide valve seat moves to the first cavity volume direction, thereby reduces the impact between guide valve seat and guide valve core.
In the present invention, controlling device comprises adjustable lever, and an end of adjustable lever is the spacing adjustable side that can contact with the guide portion termination of guide valve core, the connecting end that the other end is connected with valve body by screw mechanism.Regulate the position of the adjustable side of adjustable lever by screw mechanism and realize regulating stroke and the position that guide valve core contacts with adjustable lever.Screw mechanism comprises the adjustable lever mounting hole that is arranged on connecting valve inside and outside on valve body and is arranged on the regulating nut that the mounting hole outside and valve body are spirally connected, and the connecting end of adjustable lever contacts with regulating nut with mounting hole sliding fit and termination and is connected.By rotary nut, realize that adjustable lever slides and stroke and position when regulating guide valve core and contacting with adjustable lever in mounting hole.Screw mechanism can also be to comprise the adjustable lever mounting hole that is arranged on connecting valve inside and outside on valve body, the connecting end of adjustable lever is arranged in mounting hole, the connecting end of adjustable lever and mounting hole hole wall are provided with the screw thread that cooperatively interacts, and are provided with inner hexagonal hole on the end face of adjustable lever connecting end.
In the present invention, the end face of the contiguous controlling device of guide valve seat is provided with a cavity, and the sidewall of cavity coordinates described the second cavity volume of formation with the side of adjustable lever.
In the present invention, between the chamber, oil circuit can be arranged on guide valve seat, also can be arranged on guide valve core, in the time of on being arranged on guide valve core, the spacing adjustable side of adjustable lever is provided with from the logical oily passage that end face flows into, flow out the side, when the contact of spacing adjustable side and guide valve core is connected, between the chamber, oil circuit can be communicated with the second cavity volume by leading to oily passage.Logical oil duct can be taked various ways, for example be provided with counterbore on the end face of spacing adjustable side, the side is provided with the perforation that runs through the counterbore sidewall, counterbore when guide valve core and the contact of spacing adjustable side are connected with the chamber between oil circuit be communicated with, the end face oil groove run through whole spacing adjustable side end face perhaps is set on the end face of spacing adjustable side, contacts in guide valve core and spacing adjustable side when being connected that between end face oil groove and chamber, oil circuit is communicated with.
The present invention provides another kind of technological scheme for solving its technical problem, this scheme is a kind of adjustable guide's reduction valve of structure, it comprises main valve and the main valve opening device that is fixedly connected with main valve, and main valve comprises main valve body, and main valve body is provided with main valve plug chamber, high pressure filler opening, low pressure oil outlet; The main valve plug that in the main valve plug chamber, setting can be moved therein vertically, one end of main valve plug is connected with Returnning spring, main valve plug is provided with the epicoele with the main valve plug adjacency in the same side of Returnning spring, epicoele is the control chamber that main valve plug is opened, when upper cavity pressure reduces certain value, being subjected to force unbalance of main valve plug both sides and upwards cavity direction move.Described main valve plug is along with it moves and change valve port opening from the high pressure filler opening to the low pressure oil outlet along its axial direction in the main valve plug valve pocket.the main valve opening device comprises a valve body, establish a valve pocket in valve body, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume, opposite side has the second cavity volume, the first cavity volume is communicated with epicoele, the first cavity volume detects oil circuit by oil pressure and is communicated with the low pressure oil outlet, detect on oil circuit at oil pressure and be provided with the main valve throttle orifice, liquid effects acts on axial area on pilot valve in the axial area on pilot valve greater than the second intracavity liquid in the first cavity volume, be provided with oil circuit between the chamber that is communicated with the first cavity volume and the second cavity volume in pilot valve, described pilot valve comprises guide valve core and guide valve seat, described guide valve seat and pilot valve cavity wall sliding fit, guide valve seat is provided with one and axially connects the pilot valve hole of guide valve seat, described guide valve core comprises the guide portion of head, the tapering of afterbody, the joint that connects guide portion and tapering, described guide portion and described pilot valve hole sliding fit, has the pilot valve gap between described joint and pilot valve hole hole wall, described tapering is positioned at the first cavity volume, when the tapering disengages with point limit, pilot valve hole, the first cavity volume is communicated with the pilot valve gap, guide valve seat is provided with the radial direction through hole that is communicated with the pilot valve gap, valve body is provided with the pilot valve oil outlet that is communicated with radial direction through hole, be provided with damping spring in the first cavity volume, one end of damping spring is connected with the valve body contact, the other end is connected with the tapering contact of guide valve core, the guide spool applies towards the elastic force of the second cavity volume direction, be provided with pressure adjusting spring, adjustable diameter and screw adjusting mechanism in the second cavity volume side, one end of described pressure adjusting spring is connected with the guide valve seat contact, the other end is connected with adjustable diameter and screw adjusting mechanism and can be regulated by adjustable diameter and screw adjusting mechanism the pretension elastic force of pressure adjusting spring, be provided with spacing shoulder on the sidewall of the first cavity volume, be provided with the spacing preiection of spacing shoulder Corresponding matching in the tapering of guide valve core.When the reduction valve in the present invention is worked, when the pressure in the first cavity volume during higher than the setting of pressure adjusting spring, the limit dais shoulder grafting of the positive stop lug boss in guide valve core tapering and the first cavity volume sidewall touches and makes guide valve core stop moving, guide valve seat continues mobile and causes pilot valve to be opened, and makes the pressure decreased in the first cavity volume.Can regulate the pressure that pilot valve is opened by the pretension elastic force of adjustable diameter and screw adjusting mechanism Regulation spring in the present invention, realize that the low pressure oil outlet pressure of reduction valve is regulated.
Adjustable diameter and screw adjusting mechanism comprises adjustable lever, is provided for the pilot hole of adjustable lever sliding fit on valve body, is arranged on the nut that the pilot hole outside is connected with valve body screw thread in the present invention, the inner end of described adjustable lever is connected with the pressure adjusting spring contact, and the outer end is connected with the nut contact.Adjustable diameter and screw adjusting mechanism can also be directly and the adjustable lever that is spirally connected of valve body in addition, and the inner end of adjustable lever contacts with pressure adjusting spring, and the outer end is positioned at outside valve body, available instrument rotary regulating lever.
The present invention compared with prior art has following beneficial effect:
1. in adjustable guide's reduction valve of the present invention, guide valve core and guide valve seat all can endwisely slip, and when pilot valve cut out, guide valve seat guide spool moved, and guide valve core is subjected to the effect of damping spring, the impact when the available buffer guide valve seat contacts with guide valve core; The present invention can make pilot valve be subjected to the lifting surface area of hydraulic oil axial action in the second cavity volume to be slightly less than the lifting surface area that pilot valve is subjected to hydraulic oil axial action in the first cavity volume by design in addition, thereby can select the less pressure adjusting spring of rigidity, the impact of guide valve seat and guide valve core when reducing the pilot valve open and close.The present invention by can axially movable guide valve seat, impact force when the reduction guide valve seat such as the buffering of guide valve core, damping spring and guide valve core are closed, thereby extend working life of pilot valve.
2. in the present invention, guide valve core is by its guide rod and valve opening sliding fit, it only can endwisely slipped along guide's valve opening, can not produce skew radially, when pilot valve was opened, an end of guide valve core was subjected to the extruding of damping spring in addition, the other end and controlling mechanism or limit dais shoulder grafting touch, make it be in a kind of steady state, even do not utter long and high-pitched sounds so can not produce vibration, can not increase the noise radiation of machine.
3. the stroke when regulating guide valve core and contact with controlling device by controlling device in the present invention and final position or the elastic force by adjustable diameter and screw adjusting mechanism Regulation spring are conveniently realized in the adjusting of this reduction valve cracking pressure and using process the correction adjustment to cracking pressure.
Description of drawings
Fig. 1 is the structural representation of adjustable guide's reduction valve in the embodiment of the present invention 1;
Fig. 2 is the structural representation of main valve opening device in adjustable guide's reduction valve in embodiment 1;
Fig. 3 is the structural representation of pilot valve and controlling mechanism in embodiment 1;
Fig. 4 is the structural representation of main valve in embodiment 1;
Fig. 5 is the structural representation of adjustable guide's reduction valve in the embodiment of the present invention 2;
Fig. 6 is the structural representation of adjustable guide's reduction valve in the embodiment of the present invention 3;
Fig. 7 is the structural representation of adjustable guide's reduction valve in the embodiment of the present invention 4;
Fig. 8 is the structural representation of adjustable guide's reduction valve in the embodiment of the present invention 5.
Component title and sequence number in figure:
1, plug screw 11, valve pocket 12, pilot valve filler opening 13, pilot valve oil outlet 14, valve seat 15, spacing shoulder 16, oil pressure detect oil circuit entrance 17;
2, the first cavity volume 21, the second cavity volume 22, damping spring 23, pressure adjusting spring 24;
3, main valve plug 3, main valve throttle orifice 31, epicoele 34, main valve sleeve 35;
4, oil circuit 44 between guide valve core 4, guide portion 41, tapering 42, joint 43, chamber, pilot valve gap 45, pilot valve throttle orifice 46, spacing preiection 47;
5, guide valve seat 5, radial direction through hole 51;
6, main valve body 61, main valve oil pressure detect oil circuit 62, Returnning spring 64, pilot valve overflow oil circuit 65, high pressure filler opening 66, low pressure oil outlet 67;
8, adjustable lever 8, counterbore 81, radial perforation 82, end face oil groove 83, inner hexagonal hole 84, spacing section 85, regulate section 86, spherojoint 87;
9, nut 9, fastening screw nut 91.
Embodiment
Below in conjunction with drawings and Examples, the adjustable guide's reduction valve of the present invention is described.
Embodiment 1:
As shown in Figure 1, adjustable guide's reduction valve comprises main valve B and the main valve opening device A that is fixedly connected with main valve, as shown in Figure 4, main valve B comprises main valve body 61, main valve body 61 is provided with high pressure filler opening 66, low pressure oil outlet 67, be provided with main valve sleeve 35 in main valve body, the interior cunning of main valve sleeve 35 is established main valve plug 3;
In the present embodiment, when the pressure at low pressure oil outlet 67 places lower than reduction valve in the cracking pressure of pilot valve, when also namely the pressure in the first cavity volume is lower than the pilot valve cracking pressure, under the effect of damping spring 23 and pressure adjusting spring 24, tapering 42 contacts with the tactile formation sealing of sharp edge joint in pilot valve hole, pilot valve is in closed condition, and main valve plug 3 is in a certain position under the effect of Returnning spring 64 and hydraulic oil, makes valve port opening keep certain value.after the pressure rising at low pressure oil outlet 67 places, after also namely the first interior hydraulic fluid pressure of cavity volume 21 raises, act on the active force in pilot valve left side greater than the active force that acts on the pilot valve right side, pilot valve moves right, when guide valve core 4 contacts with adjustable lever 8, pressure in the first cavity volume 21 equals the cracking pressure of pilot valve, if the pressure in the first cavity volume 21 is during higher than this cracking pressure, guide valve core 4 stops mobile, guide valve seat 5 continues to move right, this moment, the tapering 42 of guide valve core 4 disengaged with point limit, pilot valve hole, make the first cavity volume 21 be communicated with pilot valve gap 45, hydraulic oil in the first cavity volume 21 is by pilot valve gap 45, radial direction through hole 51, pilot valve oil outlet 14, pilot valve overflow oil circuit 65 enters fuel tank, cause pressure and epicoele 34 interior pressure in the first cavity volume 21 to reduce rapidly, damping function due to main valve throttle orifice 31, pressure in the first cavity volume is lower than the pressure at low pressure oil outlet 67 places, pressure in epicoele is also lower than the pressure at low pressure oil outlet 67 places, main valve plug 3 moves to epicoele 34 directions under the effect of the pressure difference of its both sides, make the degree of misalignment aggravation of through hole on through hole on main valve plug 3 and main valve sleeve 35, also namely reduce valve port opening, make the pressure decreased at low pressure oil outlet 66 places.
When the pressure in the first cavity volume 21 during lower than the cracking pressure of pilot valve, act on the active force on pilot valve right side greater than the active force that acts on the pilot valve upper left side, guide valve seat 5 is moved to the left under the promotion of pressure adjusting spring 24, make the sharp limit in pilot valve hole be connected with tapering 42 contacts, disconnect the first cavity volume 21 to the pilot valve gap 45 oil circuit, make pressure in the first cavity volume 21 be promoted and make the active force of the pilot valve left and right sides be able to balance.Pressure in epicoele 34 also raises, and main valve plug again reaches stress balance and keeps current location, keeps the valve port opening from the high pressure filler opening to the low pressure oil outlet, also namely keeps the pressure of low pressure oil outlet.when the point limit, pilot valve hole of guide valve seat 5 contacts with tapering 42, guide valve core 4 is moved to the left the impact of snubber guide valve seat 5 under the effect of damping spring 23, reduce the percussion of guide valve seat 5, in the process that pilot valve cuts out, guide valve seat 5 is moved to the left, cause the volume of the second cavity volume 22 to increase, hydraulic oil enters from the first cavity volume 21 by oil circuit between the chamber 44 and enters into the second cavity volume 22, damping function due to the pilot valve throttle orifice 46 on oil circuit between the chamber 44, can slow down the inflow of hydraulic oil, also can slow down the travelling speed of guide valve seat 5, thereby can further reduce guide valve seat to the impact of guide valve core, extend the working life of pilot valve.Guide valve core 4 offset collisions radially can not occur between guide valve core 4 and guide valve seat 5 and produce noise, so the reduction valve operational noise in the present embodiment is little due to the leading role of guide portion 41.can rotate the position that adjustable lever 8 changes the spacing adjustable side of adjustable lever 8 by tool using in the present embodiment, when guide valve core 4 contacts with adjustable lever 8 in the present invention, pilot valve is opened, spacing adjustable side is in different positions, when guide valve core 4 contacts from adjustable lever 8, the reduction length of 5 pairs of pressure adjusting springs 24 of guide valve seat is different, also namely has different cracking pressures, for example when rotating adjustable lever 8, adjustable lever is moved right, pilot valve moves right under the effect of hydraulic oil, when guide valve core 4 contacts with adjustable lever 8, the compressed length of pressure adjusting spring 24 increases, therefore the cracking pressure of pilot valve also namely increases, in like manner, when the rotation adjustable lever is moved to the left the spacing adjustable side of adjustable lever 8, during the contacting of guide valve core 4 and adjustable lever 8, the compressed length of pressure adjusting spring 24 reduces and cracking pressure is reduced, therefore this enforcement can be by the cracking pressure of rotary nut 9 conveniently adjusted pilot valves, realize regulating the pressure at reduction valve low pressure oil outlet 66 places.
Embodiment 2:
As shown in Figure 5, compare with embodiment 1, the difference of the guide's reduction valve in the present embodiment is the structure of controlling device and main valve, in the present embodiment, the end face of the spacing adjustable side of adjustable lever 8 has end face oil groove 83, when 8 contacts of guide valve core 4 and adjustable lever are connected between the chamber oil circuit pass through end face oil groove 83 and be communicated with the second cavity volume.Adjustable lever mounting hole and nut 9 contacts that the other end of adjustable lever 8 passes on valve pocket 12 are connected, and nut 9 is positioned at the outside of adjustable lever mounting hole and is spirally connected with valve pocket 12, and the place of being spirally connected is provided with fastening screw nut 91 and prevents the improper movement of nut 9.On main valve, main valve throttle orifice 31 is arranged on main valve plug 3, main valve throttle orifice 31 is communicated with epicoele 34 and low pressure oil outlet 67, pilot valve filler opening 13, epicoele 34, main valve throttle orifice 31 consists of the oil pressure that is communicated with the first cavity volumes 21 and low pressure oil outlet 67 and detects oil circuit, and the first cavity volume 21 when pilot valve cuts out, epicoele 34 have identical pressure with low pressure oil outlet 67 places.
Embodiment 3:
As shown in Figure 6, compare with embodiment 2, the difference of the guide's reduction valve in the present embodiment is valve body and the guide valve seat 5 of main valve opening device A, in the present embodiment, valve body is made of valve seat 15 and valve pocket 12 bolts, and the left section intracavity sidewall with valve seat 15 of guide valve seat 5 coordinates, and pilot valve filler opening 13 arranges on valve seat 15 on record with pilot valve oil outlet 14, pilot valve filler opening 13 is communicated with epicoele 34 with the first cavity volume 21, pilot valve oil outlet 14 is communicated with pilot valve overflow oil circuit 65 and radial direction through hole 51.The right side of guide valve seat 5 is provided with cavity, the side sliding fit of the sidewall of cavity and adjustable lever 8 and form the second cavity volume 22 between pilot valve and adjustable lever 8, wherein the diameter of adjustable lever 8 and guide valve seat 5 cooperation places is less than the diameter of left section of guide valve seat 5 and valve seat 15 intracavity sidewall cooperation places.
Embodiment 4:
as shown in Figure 7, compare with embodiment 3, the difference of the guide's reduction valve in the present embodiment is on the formation of adjustable lever 8, in the present embodiment, adjustable lever comprises two sections, spacing section 85 of coordinating with guide valve seat 5 of the first, another section is to raise the adjusting section 86 of pole mounting hole sliding fit with valve pocket 12, be provided with spherojoint 87 is connected with spacing section 85 contact in the termination of regulating section, allowing to regulate section 86 rotates in the several angle scope with spacing section 85, can reduce like this valve seat 15 inner chambers, guide valve seat 5 and adjustable lever 8, the coaxality requirement of adjustable lever mounting hole, reduce difficulty of processing, prevent that guide valve seat 5 is conditioned bar and blocks.
Embodiment 5:
as shown in Figure 8, compare with embodiment 2, the difference of the guide's reduction valve in the present embodiment is: the spacing shoulder 16 that is provided with annular on the sidewall of the first cavity volume 21, afterbody at guide valve core 4 is provided with spacing preiection 47, when guide valve core 4 moves right, spacing preiection 47 can contact with spacing shoulder 16, thereby the stroke final position to the right of restriction guide valve core 4, in the second cavity volume 22, pressure adjusting spring 24 is connected with adjustable lever 8 contacts, can realize by the pretension elastic force that rotary nut 9 is regulated pressure adjusting spring 24 adjusting of different cracking pressures, in the present embodiment, when after spacing preiection 47 contacts with spacing shoulder 16, guide valve seat 5 continues to move right, pilot valve is opened.
Claims (10)
1. adjustable guide's reduction valve, comprise main valve (B) and the main valve opening device (A) that is fixedly connected with main valve, described main valve (B) comprises main valve body (61), and main valve body (61) is provided with main valve plug chamber, high pressure filler opening (66), low pressure oil outlet (67), the main valve plug (3) that in the main valve plug chamber, setting can be moved therein vertically, one end of main valve plug (3) is connected with Returnning spring (64), described main valve plug (3) is provided with the epicoele (34) with main valve plug (3) adjacency in the same side of Returnning spring (64), described main valve plug (3) is along with it moves and change valve port opening from high pressure filler opening (66) to low pressure oil outlet (67) along its axial direction in the main valve plug valve pocket, it is characterized in that, described main valve opening device (A) comprises a valve body, establish a valve pocket in valve body, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume (21), opposite side has the second cavity volume (22), the first cavity volume (21) is communicated with epicoele (34), the first cavity volume (21) detects oil circuit by oil pressure and is communicated with low pressure oil outlet (67), detect on oil circuit at oil pressure and be provided with main valve throttle orifice (31), the axial area of the interior liquid effects of the first cavity volume (21) on pilot valve is greater than the axial area of (22) liquid effects on pilot valve in the second chamber, be provided with oil circuit (44) between the chamber that is communicated with the first cavity volume (21) and the second cavity volume (22) in pilot valve, described pilot valve comprises guide valve core (4) and guide valve seat (5), described guide valve seat (5) and valve pocket sidewall sliding fit, guide valve seat (5) is provided with one and axially connects the pilot valve hole of guide valve seat, described guide valve core (4) comprises the guide portion (41) of head, the tapering of afterbody (42), the joint (43) that connects guide portion (41) and tapering (42), described guide portion (41) and described pilot valve hole sliding fit, has pilot valve gap (45) between described joint (43) and pilot valve hole hole wall, described tapering (42) is positioned at the first cavity volume (21), when tapering (42) disengages with point limit, pilot valve hole, the first cavity volume (21) is communicated with pilot valve gap (45), guide valve seat (5) is provided with the radial direction through hole (51) that is communicated with pilot valve gap (45), valve body is provided with the pilot valve oil outlet (14) that is communicated with radial direction through hole (51), be provided with damping spring (23) in described the first cavity volume (21), one end of described damping spring (23) is connected with the valve body contact, the other end is connected with the tapering contact of guide valve core, establish pressure adjusting spring (24) and controlling device in the second cavity volume (22) side, one end of described pressure adjusting spring (24) is connected with guide valve seat (5) contact, the other end is connected with the valve body contact, described controlling device make guide valve core (4) to the shift motion of the second cavity volume (22) direction less than guide valve seat (5) to the second cavity volume (22) direction shift motion and can regulate guide valve core (4) stroke final position.
2. adjustable guide's reduction valve according to claim 1, is characterized in that, is provided with pilot valve throttle orifice (46) on oil circuit between described chamber (44).
3. adjustable guide's reduction valve according to claim 1, it is characterized in that, described controlling device comprises adjustable lever (8), one end of described adjustable lever (8) is the spacing adjustable side that can be connected with guide portion (41) the termination contact of guide valve core, the connecting end that the other end is connected with valve body by screw mechanism.
4. adjustable guide's reduction valve according to claim 3, it is characterized in that, described screw mechanism comprises the adjustable lever mounting hole that is arranged on connecting valve inside and outside on valve body and is arranged on the regulating nut (9) that the mounting hole outside and valve body are spirally connected, and the connecting end of described adjustable lever (8) contacts with the mounting hole sliding fit and with regulating nut (9) and is connected.
5. adjustable guide's reduction valve according to claim 3, it is characterized in that, described screw mechanism comprises the adjustable lever mounting hole that is arranged on connecting valve inside and outside on valve body, the connecting end of described adjustable lever (8) is arranged in mounting hole, connecting end and the mounting hole hole wall of adjustable lever (8) are provided with the screw thread that cooperatively interacts, and are provided with inner hexagonal hole (84) on the end face of adjustable lever connecting end.
6. adjustable guide's reduction valve according to claim 3, is characterized in that, the end face of the contiguous controlling device of described guide valve seat is provided with a cavity, and the sidewall of described cavity coordinates formation described the second cavity volume (22) with the side of described adjustable lever (8).
7. the described adjustable guide's reduction valve of any one according to claim 1 to 6, is characterized in that, oil circuit between described chamber (44) is arranged on guide valve seat.
8. the described adjustable guide's reduction valve of any one according to claim 3 to 6, is characterized in that, oil circuit between described chamber (44) arranges on guide valve core, and the spacing adjustable side of described adjustable lever is provided with from the logical oily passage that end face flows into, flow out the side.
9. adjustable guide's reduction valve, comprise main valve (B) and the main valve opening device (A) that is fixedly connected with main valve, described main valve (B) comprises main valve body (61), and main valve body (61) is provided with main valve plug chamber, high pressure filler opening (66), low pressure oil outlet (67), the main valve plug (3) that in the main valve plug chamber, setting can be moved therein vertically, one end of main valve plug (3) is connected with Returnning spring (64), described main valve plug (3) is provided with the epicoele (34) with main valve plug (3) adjacency in the same side of Returnning spring (64), described main valve plug (3) is along with it moves and change valve port opening from high pressure filler opening (66) to low pressure oil outlet (67) along its axial direction in the main valve plug valve pocket, it is characterized in that, described main valve opening device (A) comprises a valve body, establish a valve pocket in valve body, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume (21), opposite side has the second cavity volume (22), the first cavity volume (21) is communicated with epicoele (34), the first cavity volume (21) detects oil circuit by oil pressure and is communicated with low pressure oil outlet (67), detect on oil circuit at oil pressure and be provided with main valve throttle orifice (31), the axial area of the interior liquid effects of the first cavity volume (21) on pilot valve is greater than the axial area of (22) liquid effects on pilot valve in the second chamber, be provided with oil circuit (44) between the chamber that is communicated with the first cavity volume (21) and the second cavity volume (22) in pilot valve, described pilot valve comprises guide valve core (4) and guide valve seat (5), described guide valve seat (5) and valve pocket sidewall sliding fit, guide valve seat (5) is provided with one and axially connects the pilot valve hole of guide valve seat, described guide valve core (4) comprises the guide portion (41) of head, the tapering of afterbody (42), the joint (43) that connects guide portion (41) and tapering (42), described guide portion (41) and described pilot valve hole sliding fit, has pilot valve gap (45) between described joint (43) and pilot valve hole hole wall, described tapering (42) is positioned at the first cavity volume (21), when tapering (42) disengages with point limit, pilot valve hole, the first cavity volume (21) is communicated with pilot valve gap (45), guide valve seat (5) is provided with the radial direction through hole (51) that is communicated with pilot valve gap (45), valve body is provided with the pilot valve oil outlet (14) that is communicated with radial direction through hole (51), be provided with damping spring (23) in described the first cavity volume (21), an end of described damping spring (23) is connected with the valve body contact, and the other end is connected with the tapering contact of guide valve core, be provided with pressure adjusting spring (24) and adjustable diameter and screw adjusting mechanism in the second cavity volume (22) side, one end of described pressure adjusting spring (24) is connected with guide valve seat (5) contact, the other end is connected with adjustable diameter and screw adjusting mechanism and can be regulated by adjustable diameter and screw adjusting mechanism the pretension elastic force of pressure adjusting spring (24), be provided with spacing shoulder (16) on the sidewall of the first cavity volume (21), be provided with in the tapering (42) of guide valve core and the spacing preiection (47) of spacing shoulder (16) Corresponding matching restriction guide valve core to the second cavity volume method shift motion.
10. adjustable guide's reduction valve according to claim 9, it is characterized in that, adjustable diameter and screw adjusting mechanism comprises adjustable lever (8), be provided for the pilot hole of adjustable lever (8) sliding fit on valve body, be arranged on the nut (9) that the pilot hole outside is connected with valve body screw thread, the inner end of described adjustable lever (8) is connected with pressure adjusting spring (24) contact, and the outer end is connected with nut (9) contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367759.XA CN103122883B (en) | 2011-11-18 | 2011-11-18 | Adjustable pilot reduction valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367759.XA CN103122883B (en) | 2011-11-18 | 2011-11-18 | Adjustable pilot reduction valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103122883A true CN103122883A (en) | 2013-05-29 |
| CN103122883B CN103122883B (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110367759.XA Active CN103122883B (en) | 2011-11-18 | 2011-11-18 | Adjustable pilot reduction valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103122883B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289174A (en) * | 2016-04-01 | 2017-10-24 | 浙江盾安机械有限公司 | Magnetic valve |
| CN108087364A (en) * | 2017-12-19 | 2018-05-29 | 番禺珠江钢管（珠海）有限公司 | A kind of double pressure unloading valves |
| CN108506261A (en) * | 2018-04-11 | 2018-09-07 | 王爱菊 | Pressure regulating method based on valve gear |
| CN116181940A (en) * | 2023-04-26 | 2023-05-30 | 青岛开元阀门有限公司 | Air pressure reducing valve for ship |
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| GB1465798A (en) * | 1973-05-21 | 1977-03-02 | Bennes Marrel | Safety valve |
| CN1040420A (en) * | 1989-05-19 | 1990-03-14 | 刘长年 | Multifunctional floating pressure control valve |
| CN201144914Y (en) * | 2007-12-29 | 2008-11-05 | 上海立新液压有限公司 | Pilot type pressure reducing valve |
| CN201209603Y (en) * | 2008-02-01 | 2009-03-18 | 上海立新液压有限公司 | Guiding sequence valve |
| DE102008044800A1 (en) * | 2008-08-28 | 2010-03-04 | Robert Bosch Gmbh | Pilot-controlled pressure control valve, particularly pressure shut-off valve, pressure relief valve or pressure reducing valve, comprises master valve with master piston and pilot valve, where master piston is pre-stressed by spring |
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2011
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1465798A (en) * | 1973-05-21 | 1977-03-02 | Bennes Marrel | Safety valve |
| CN1040420A (en) * | 1989-05-19 | 1990-03-14 | 刘长年 | Multifunctional floating pressure control valve |
| CN201144914Y (en) * | 2007-12-29 | 2008-11-05 | 上海立新液压有限公司 | Pilot type pressure reducing valve |
| CN201209603Y (en) * | 2008-02-01 | 2009-03-18 | 上海立新液压有限公司 | Guiding sequence valve |
| DE102008044800A1 (en) * | 2008-08-28 | 2010-03-04 | Robert Bosch Gmbh | Pilot-controlled pressure control valve, particularly pressure shut-off valve, pressure relief valve or pressure reducing valve, comprises master valve with master piston and pilot valve, where master piston is pre-stressed by spring |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289174A (en) * | 2016-04-01 | 2017-10-24 | 浙江盾安机械有限公司 | Magnetic valve |
| CN108087364A (en) * | 2017-12-19 | 2018-05-29 | 番禺珠江钢管（珠海）有限公司 | A kind of double pressure unloading valves |
| CN108087364B (en) * | 2017-12-19 | 2024-03-19 | 番禺珠江钢管（珠海）有限公司 | Double-pressure unloading valve |
| CN108506261A (en) * | 2018-04-11 | 2018-09-07 | 王爱菊 | Pressure regulating method based on valve gear |
| CN116181940A (en) * | 2023-04-26 | 2023-05-30 | 青岛开元阀门有限公司 | Air pressure reducing valve for ship |
| CN116181940B (en) * | 2023-04-26 | 2023-07-07 | 青岛开元阀门有限公司 | Air pressure reducing valve for ship |
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| Publication number | Publication date |
|---|---|
| CN103122883B (en) | 2015-09-02 |
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