CN105604586A - Valve element assembly of safety valve - Google Patents
Valve element assembly of safety valve Download PDFInfo
- Publication number
- CN105604586A CN105604586A CN201610051829.3A CN201610051829A CN105604586A CN 105604586 A CN105604586 A CN 105604586A CN 201610051829 A CN201610051829 A CN 201610051829A CN 105604586 A CN105604586 A CN 105604586A
- Authority
- CN
- China
- Prior art keywords
- valve
- safety valve
- core assembly
- swivel nut
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Abstract
The invention discloses a valve element assembly of a safety valve. The valve element assembly comprises a slide seat, a screw sleeve which is arranged in the slide seat, and a valve pad which is arranged in the screw sleeve and is matched with a liquid feeding connector of the safety valve. The valve element assembly disclosed by the invention is applied to the safety valve, and can be used for controlling the on/off of an oil path from a liquid feeding hole to a liquid discharging hole; when the valve element assembly is far away from the liquid feeding connector, large-flow overflowing can be realized and the flow of the safety valve is greatly improved; axial displacement of the valve element assembly can be shortened by rapid overflowing within short time; the axial displacement of the valve element assembly is shortened so that axial deformation of a resetting spring can be reduced; finally, pressure fluctuation can be reduced.
Description
Technical field
The invention belongs to and relate to coal mine fully-mechanized mining hydraulic support, specifically, the present invention relates to a kind of safety valveCore assembly.
Background technology
Along with large-scale enforcement and the development of coal mine fully-mechanized mining hydraulic support, the requirement of working face to hydraulic supportAlso more and more stricter, so just the safety valve of protective cradle hydraulic jack is had to further requirement, especiallyThat service life and reliability to safety valve had further requirement, when the pressure from hydraulic support topWhen power causes by power, can safety valve in the situation that bearing high pressure, and the short time is fully stable unloading in timeLotus directly affects service life and the supporting safety of support. It not only can damage seal, pipeline and hydraulic pressure unitPart, but also can cause vibrations and noise; Sometimes make some pressure controlled Hydraulic Elements produce error.
The safety valve using at present, mainly comprise valve casing, liquid inlet joint, spool, valve pocket, back-moving spring,Spring base and voltage regulation screw. In valve casing contained spring chamber, it is that screw thread connects that back-moving spring one end is against with valve casingOn the voltage regulation screw connecing, the other end is against movably on spring base. Valve body inserts the valve casing other end and and valveShell is for being threaded, and valve inner is provided with the cavity for holding valve pocket, and spool is positioned at valve pocket, spoolEnd contacts with spring base, moves for promoting spring base the unlatching that realizes safety valve.
The overflow ducts of existing safety valve is to adopt around the liquid pass hole being arranged on spool sidewall, liquid pass hole holeFootpath is little, causes that draining flow is little, flow loss is large, and because spool matches with spring base, spring baseBear the axial force that back-moving spring applies, cause spool force-bearing situation bad, pressure wave in the course of workMoving larger, and then cause the closing presure of safety valve generally all undesirable, finally can cause being connected with safety valveHydraulic Elements too much run off and cause waste as the fluid of high-voltage oil cylinder. Sealing effectiveness between spool and valve pocketUndesirable, spool face setting wayward for the groove processing precision of seal is installed. In addition, valveThe spring cavity of shell inside is in open state, and dustproof, waterproof and rust-proof effect are poor, reduce the use of safety valveLife-span.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art. For this reason, the invention providesA core assembly for safety valve, object is to reduce pressure oscillation.
To achieve these goals, the technical scheme that the present invention takes is: the core assembly of safety valve, comprisesSliding seat, be arranged at the swivel nut in sliding seat and be arranged in swivel nut and for the liquid inlet joint phase of safety valveThe valve pad coordinating, valve pad has sunk structure.
Described liquid inlet joint comprises the joint body being connected with the valve body of safety valve and connects with joint body is fixingThe sealing that connects and match with described nut and valve pad, liquid inlet joint has inlet opening, and valve body has discharge opeingHole.
Described valve pad is fixedly clamped by described sliding seat and described swivel nut.
Described swivel nut has the first accommodating cavity for holding described sealing and holds described valve pad and with firstThe second accommodating cavity that accommodating cavity is communicated with, described sliding seat has the 3rd accommodating cavity that holds swivel nut.
The end face of described sliding seat is provided with the first oil duct for fluid being guided to outage, described swivel nutEnd face be provided with the second oil duct for fluid being guided to the first oil duct, when described valve pad and described sealingPart is from rear, and the fluid in described inlet opening flow to described outage place through the second oil duct, the first oil duct successively.
Described the first oil duct, the second oil duct and described outage are positioned on the same RADIAL of described valve body.
Described sealing is can embed in the first accommodating cavity of described swivel nut and the Step-edge Junction contacting with described valve padStructure, the diameter of described the second accommodating cavity is greater than the diameter of the first accommodating cavity.
Described sealing has and sets gradually and the first shaft part and the second shaft part that overall diameter increases gradually, and secondShaft part is fixedly connected with described joint body, and the first shaft part matches with described valve pad, and the first shaft part outsideDiameter is not more than the diameter of described the first accommodating cavity.
Core assembly of the present invention, is applied to safety valve, can be used for controlling inlet opening to the oil circuit of outageBreak-make can realize large flow overflow after core assembly is away from liquid inlet joint, and safety valve flow improves greatly,The quick overflow of short time can be dwindled the axial displacement of core assembly, and core assembly axial displacement is dwindled passableThe axial deformation of back-moving spring is reduced, finally can reduce pressure oscillation.
Brief description of the drawings
This description comprises the following drawings, shown in content respectively:
Fig. 1 is the cutaway view with the safety valve of core assembly of the present invention;
Fig. 2 is the cutaway view of core assembly of the present invention;
Fig. 3 is the cutaway view of liquid inlet joint;
Fig. 4 is the cutaway view of sliding seat;
Fig. 5 is the side view of sliding seat;
Fig. 6 is the cutaway view of swivel nut;
Fig. 7 is the side view of swivel nut;
Fig. 8 is the cutaway view of valve body;
Fig. 9 is the cutaway view of valve pad;
Figure 10 is the cutaway view of spring base;
Figure 11 is that the valve pad of the first structure coordinates schematic diagram with sealing;
Figure 12 is that the first structure valve pad coordinates schematic diagram with sealing in the time of opening;
Figure 13 is the cutaway view of the valve pad of the second structure;
Figure 14 is the stressed schematic diagram of the second structure valve pad in the time of closed condition;
Figure 15 is that the second structure valve pad coordinates schematic diagram with sealing in the time of opening;
Figure 16 is the cutaway view of the valve pad of the third structure;
Figure 17 is the stressed schematic diagram of the third structure valve pad in the time of closed condition;
Figure 18 is that the third structure valve pad coordinates schematic diagram with sealing in the time of opening;
In figure, be labeled as:
1, voltage regulation screw; 2, back-moving spring;
3, valve body; 31, outage; 32, unloading cavity;
4, spring base; 41, the first boss; 42, guide section; 43, the first locating hole;
5, swivel nut; 51, chamber, large footpath; 52, path chamber; 53, the second accommodating cavity; 54, the second oil duct; 6,Sliding seat; 61, the second locating hole; 62, the 3rd accommodating cavity; 63, the first oil duct;
7, valve pad; 71, inner bottom surface; 72, anchor ring; 73, sunk structure; 74, male cone (strobilus masculinus); 75, the endPlane; 8, liquid inlet joint; 81, joint body; 82, the first shaft part; 83, the second shaft part; 84, feed liquorHole; 9, valve casing; 10, spheroid; 11, the first sealing ring; 12, the second sealing ring.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is done furtherDetailed explanation, object is to help those skilled in the art to have completeer to design of the present invention, technical schemeWhole, accurate and deep understanding, and contribute to its enforcement.
As shown in Figures 1 to 10, for adopting a kind of safety valve of core assembly of the present invention, this safety valve comprisesThere is the valve body 3 of outage 31, the valve casing 9 that there is the liquid inlet joint 8 of inlet opening 84, is connected with valve body 3With the resetting-mechanism that is arranged at valve casing 9 inside, inlet opening 84 is by the unloading cavity 32 and row of valve body 3 insideLiquid hole 31 is communicated with and three forms the overflow ducts of safety valve. In order to solve existing problem in prior art,This safety valve also comprises core assembly of the present invention, and core assembly of the present invention is for being movably arranged at valve body 3In and for controlling water kick passage break-make, core assembly between liquid inlet joint 8 and resetting-mechanism, spoolAssembly and for controlling the switching of inlet opening 84, core assembly is controlled the switching of inlet opening 84 by movementRealize the control of overflow ducts break-make.
The safety valve of prior art is generally connected on coal mine fully-mechanized mining hydraulic support and the hydraulic pressure unit of pressure medium is housedPart is as on hydraulic cylinder, when in the work set pressure of hydraulic cylinder internal liquid in safety valve, and overflow safetyValve is under initial tension of spring effect, in closed condition; When hydraulic cylinder is subject to External Force Acting internal pressure higher than peaceWhen full valve set pressure, hydraulic medium pressure exceedes initial tension of spring and opens spool overflow, the moment quilt of unlatchingBe called the work opening pressure of safety valve; The overflow of a period of time by safety valve flows out medium to discharge to pressPower is to hydraulic cylinder internal pressure and spring pre-tightening dynamic balance, and now safety valve cuts out, and safety valve stops after overflowThe steady pressure keeping is called as closing presure,
Specifically, as shown in Fig. 1 and Fig. 8, liquid inlet joint 8, valve body 3 and valve casing 9 be both ends open,The cylindrical member of inner hollow, liquid inlet joint 8 insert in an end of valve body 3 and with valve body 3 be screw threadConnect, the other end of valve body 3 inserts in an end of valve casing 9 and with valve casing 9 as being threaded. Valve casing 9Inside has the spring cavity that holds resetting-mechanism, and resetting-mechanism is to make it towards entering for core assembly is appliedLiquid joint 8 places move to realize the axial force that inlet opening 84 is closed, resetting-mechanism comprise spring base 4,Back-moving spring 2 and voltage regulation screw 1, voltage regulation screw 1 is to screw in spring cavity and and valve at the other end of valve casing 9Shell 9 is threaded, and back-moving spring 2 is to be clipped between voltage regulation screw 1 and spring base 4, and spring base 4 is at valveCan be along the moving axially of valve casing 9 by the promotion of back-moving spring 2 and core assembly in shell 9, core assembly promotesSpring base 4 moves towards voltage regulation screw 1 place and can make safety valve open, and back-moving spring 2 promotes spring base 4 HesCore assembly moves and can make safety valve close.
As shown in figures 1 and 3, liquid inlet joint 8 be for the Hydraulic Elements of coal mine fully-mechanized mining hydraulic support asHydraulic cylinder socket connection, as shown in figures 1 and 3, liquid inlet joint 8 comprises that with valve body 3 be what be threadedJoint body 81 with joint body 81 sealing for being coaxially fixedly connected with and matching with core assembly,The outer surface of joint body 81 is provided with external screw thread, is correspondingly provided with internal thread at the end of valve body 3 inner surface. EnterLiquid hole 84 is for starting from the end face center of joint body 81 and being through to vertically passing through the end face of sealingPerforation, sealing is that to be positioned at valve body 3 inner and for matching with core assembly, with controlling water kick passageBreak-make.
As shown in Fig. 1 and Fig. 8, the part cavity that is positioned at joint body 81 inner sides of valve body 3 inside is as allowingThe unloading cavity 32 that fluid passes through, outage 31 is communicated with unloading cavity 32, because the relative feed liquor of core assembly connects8 for movably, and the volume of unloading cavity 32 is adjustable. Sealing by with the reality that contacts of core assemblyClosing of existing inlet opening 84, now unloading cavity 32 volume minimums, inlet opening 84 is not communicated with outage 31,And then overflow ducts is disconnected, safety valve realizes and cutting out. When core assembly is vertically towards away from liquid inlet joint 8When direction moves, the volume of unloading cavity 32 increases gradually, and inlet opening 84 can pass through unloading cavity 32 and discharge opeingHole 31 is communicated with, overflow ducts conducting, and safety valve is realized and being opened. Therefore, safety valve is by the axle of core assemblyTo movement, realize the control of overflow ducts break-make, and be communicated with inlet opening 84 and discharge opeing by unloading cavity 32Hole 31, unloading cavity 32 volumes are large, can realize large flow overflow, in inlet opening 84 in the time of overflow ducts conductingFluid to flow in outage 31 processes drag losses little, thereby can realize quick relief in the short time, withCorresponding, the quick overflow of short time can be dwindled the axial displacement of core assembly, and core assembly is at valve body 3Inside move vertically very little distance and can complete breakdown action. And the axial displacement of core assembly is dwindled, whenHaving the safety valve of core assembly of the present invention and the safety valve of prior art adopts and has answering of identical coefficient of elasticityPosition is when spring 2, and the stroke with the back-moving spring 2 in the safety valve of core assembly of the present invention is short, reset bulletThe axial deformation of spring 2 is little, finally makes the pressure oscillation of overflow relief valve little.
As shown in Fig. 1 and Fig. 8, outage 31 is arranged on the sidewall of valve body 3, outage 31 and be edgeRadially run through the through hole of setting. Outage 31 and on the sidewall of valve body 3 along circumferentially uniform multiple, and allThe sealing that outage 31 is distributed in unloading cavity 32 and liquid inlet joint 8 around, is opened at safety valve like thisTime, the fluid in inlet opening 84 can between sealing and core assembly by and flow to outage 31.This unloading way liquid flow area is large, and flow is more direct more greatly, and drag losses is little.
As depicted in figs. 1 and 2, core assembly comprise the sliding seat 6 that is movably arranged in valve body 3 inner chambers,Be arranged at the swivel nut 5 in sliding seat 6 and be arranged in swivel nut 5 and match with sealing and realize the valve of sealingPad 7, valve pad 7 and being fixedly clamped by sliding seat 6 and swivel nut 5.
As shown in Figure 2 and Figure 6, swivel nut 5 is the cylindrical structural of both ends open and inner hollow, swivel nut 5The cavity at inside center place is the first accommodating cavity for holding sealing and holds valve pad 7 and with first accommodatingChamber be communicated with the second accommodating cavity 53, the first accommodating cavities and the second accommodating cavity 53 for axially to set gradually along swivel nut 5,And diameter is for increasing gradually. One end of valve pad 7 is towards sealing, and this end end face of valve pad 7 is and feed liquorThe perpendicular circular flat of axis of joint 8, as shown in Figure 9, valve pad 7 is by putting down with sealingFace contact realizes the control that inlet opening 84 is closed, and adopts flat seal form, good sealing effect.
As shown in Figure 2 and Figure 6, the first accommodating cavity and second accommodating cavity 53 both coaxial and connections, first holdsPut chamber and on the end face of swivel nut 5, form the opening that allows the sealing of liquid inlet joint 8 insert. Valve pad 7 is for adoptingThe circular block structure that polyurethane is made, the diameter of valve pad 7 is not less than the diameter of the second accommodating cavity 53, due toThe diameter of the first accommodating cavity is less than the diameter of the second accommodating cavity 53, in the first accommodating cavity and the second accommodating cavity 53Form a limited step, valve pad 7 is to fill in the second accommodating cavity 53 while installation, valve pad 7 and with swivel nut 5Interference fit, finally clamps valve pad 7 by sliding seat 6, realizes the axial restraint of valve pad 7.
As shown in Figure 2 and Figure 4, sliding seat 6 is and valve body 3 and the coaxial cylindrical structural of swivel nut 5, slidingThe periphery of moving seat 6 contacts with the inner headed face of valve body 3, and sliding seat 6 is positioned at spring base 4 and liquid inlet joint 8Between, sliding seat 6 can move axially and can insert valve casing 9 inside along valve body 3. Sliding seat 6 has and holdsThe 3rd accommodating cavity 62, the three accommodating cavities 62 of swivel nut 5 are the end face that faces liquid inlet joint 8 at sliding seat 6The circular cavity that center arranges and extends to form towards sliding seat 6 inside. At installation valve pad 7 and by its plugAfter entering in the second accommodating cavity 53 of swivel nut 5, the swivel nut with valve pad 75 is filled in to the 3rd appearance of sliding seat 6Put in chamber 62, the diapire of the 3rd accommodating cavity 62 until valve pad 7 is conflicted, clamps valve pad 7.
As shown in Figure 2, as preferably, swivel nut 5 insert in the 3rd accommodating cavity 62 and with sliding seat 6 be spiral shellLine connects, and is correspondingly provided with external screw thread at swivel nut 5 outer surfaces, and the inner surface in the 3rd accommodating cavity 62 is provided with interior spiral shellLine. Swivel nut 5 is arranged to be threaded with sliding seat 6, and easy disassembly swivel nut 5, so that carry out valve pad 7Change.
As shown in Figure 4 and Figure 5, as preferably, on the end face that faces liquid inlet joint 8 of sliding seat 6, establishHave allow fluid by and fluid is guided to the first oil duct 63 of outage 31, this first oil duct 63 is fromThree accommodating cavity 62 places start along the groove on the periphery that radially extends to sliding seat 6 of sliding seat 6. As figure6 and Fig. 7 shown in, the end face that faces liquid inlet joint 8 of swivel nut 5 is provided with and allows fluid pass through and fluid is guidedTo the second oil duct 54 of the first oil duct 63, this second oil duct 54 is since the first accommodating cavity place along swivel nut 5The periphery that radially extends to swivel nut 5 on groove, the first oil duct 63 is communicated with the second oil duct 54, andDiametrically, the first oil duct 63 is between outage 31 and the second oil duct 54. By at swivel nut 5 and slidingOn the end face of moving seat 6, oil duct is set, when valve pad 7 and hermetic unit from after, these oil ducts will be from inlet opening 84The fluid flowing in unloading cavity 32 guides to outage 31 places, is conducive to safety valve and realizes the quick of short timeOverflow.
As depicted in figs. 1 and 2, as preferably, the first oil duct 63, the second oil duct 54 and outage 31Quantity equate and aligned in position, the first oil duct 63 and the second oil duct 54 are respectively at sliding seat 6 and swivel nut 5End face on for being uniformly distributed circumferentially. In the axial direction of valve body 3, outage 31 is positioned at spring base 4 and connectsBetween body 81, each oil duct is respectively with outage 31 aligned in position in outside and be positioned at valve body 3On same RADIAL, when valve pad 7 and hermetic unit from after, the fluid in inlet opening 84 is successively through the second oil duct54, the first oil duct 63 flow to outage 31 places.
As preferably, sealing be can embed in the first accommodating cavity of swivel nut 5 and contact with valve pad 7 manyLevel step-like structure, sealing can have multiple plane contact with core assembly like this, improves the reliable of sealingProperty.
As shown in figures 1 and 3, in the present embodiment, sealing is two-stage step-like structure, sealing toolHave and set gradually and the first shaft part 82 and the second shaft part 83, the first shaft parts 82 and that overall diameter increases graduallyBoth are coaxial for two shaft parts 83. The second shaft part 83 with the end of joint body 81 for being coaxially fixedly connected with, secondThe overall diameter of shaft part 83 is less than the overall diameter of joint body 81. The first shaft part 82 is for embedding swivel nut 5In the first accommodating cavity, the first shaft part 82 is match with valve pad 7 and can carry out plane contact, the first shaft part 82Overall diameter be not more than the diameter of an accommodating cavity.
As shown in figures 1 and 3, the length of the first shaft part 82 is not less than the degree of depth of the first accommodating cavity, to guaranteeThe end face of the first shaft part 82 can with the end contact of valve pad 7, realize sealing. Inlet opening 84 is at the first axleOn the end face of section 82, form the opening that allows fluid flow out, this end face of the first shaft part 82 is also liquid inlet joint 8The end face of insertion end. The overall diameter of the first shaft part 82 is less than the end face diameter of valve pad 7, thereby guarantees valve pad7 end face can seal the opening on the end face of the first shaft part 82 completely. And, sealing and spool groupWhen part contact, safety valve cuts out, and now the end face of the first shaft part 82 contacts with valve pad 7, the second shaft part 83End face and the end contact of swivel nut 5 and sliding seat 6, the end face of the first shaft part 82 and the second shaft part 83 is equalFor the plane paralleling with the end face of swivel nut 5, sliding seat 6 and valve pad 7, sealing has multiple planes and valveCore assembly contacts and realizes sealing, good sealing effect, and reliability is high. In addition, because the face of employing structure is crossed liquidMode, 7 of valve pads are subject to the end contact effect of liquid inlet joint 8, and the impact that valve pad 7 bears is little, uses the longevityLife is long.
As preferably, as shown in Figure 6, the first accommodating cavity in swivel nut 5 is divided into columniform path chamber 52With chamber, conical large footpath 51, chamber, large footpath 51 has bigger diameter end and miner diameter end, the miner diameter end in chamber, large footpath 51Diameter equates with the diameter in path chamber 52, and the miner diameter end in chamber, large footpath 51 is connected with path chamber 52. GreatlyChamber, footpath 51 is coaxial with path chamber 52, path chamber 52 between chamber, large footpath 51 and the second accommodating cavity 53,The diameter of the bigger diameter end in chamber, large footpath 51 is greater than the overall diameter of the first shaft part 82, and the second oil duct 54 is from chamber, large footpath51 places start to arrange and form opening at the inner surface in chamber, large footpath 51. The swivel nut 5 of this structure has towards closeEnvelope portion uncovered, is convenient to sealing and embeds, and conical inner surface has good water conservancy diversion effect to fluidReally.
As preferably, as shown in Figure 1, core assembly also comprises and is sheathed on the sealing of second on sliding seat 6Circle, the second sealing ring is clipped between valve body 3 and sliding seat 6, the second sealing ring and be positioned at spring base 4 and arrangeBetween liquid hole 31, for realizing the sealing between unloading cavity 32 and spring cavity, avoid fluid from sliding seat 6And in the gap between valve body 3, flow in spring cavity, thereby can avoid corroding back-moving spring 2.
As shown in figure 10, the spring base 4 of resetting-mechanism is to be made up of guide section 42 and the first boss 41, leadsBe circular block structure to section 42, the first boss 41 is at a side center and the guide section 42 of guide section 42Spring base 4, the first boss 41 of the structure that is connected to form one protrude towards voltage regulation screw 1. The first boss 41Coaxial with guide section 42, the first boss 41 is cylindrical, and the diameter of guide section 42 is greater than the first boss 41Diameter. Back-moving spring 2 is helical spring, and the first boss 41 is for inserting back-moving spring 2 to resettingOne end of spring 2 positions, and voltage regulation screw 1 has for inserting back-moving spring 2 to back-moving spring 2The boss that positions of the other end.
As shown in Fig. 1 and Figure 10, resetting-mechanism also comprises the spheroid being clipped between spring base 4 and sliding seat 610, spheroid 10 is complete ball, and the effect of spheroid 10 is to make spring base 4 and sliding seat 6 at moving processIn there is good adaptivity, spring base 4 is had good in disposition. Spring base 4 face slipSeat 6 end face center has that the spheroid of allowing 10 embeds and is conical the first locating hole 43, sliding seat 6The end face center that faces spring base 4 has that the spheroid of allowing 10 embeds and is conical the second locating hole 61, theConical inner surface in one locating hole 43 and the second locating hole 61 is as determining of fitting with the sphere of spheroid 10Plane. Spring base 4 is owing to being clipped between back-moving spring 2 and core assembly, and spring base 4 diametricallyAnd between valve casing 9 inwalls, leave gap (being that spring base 4 footpaths upwards lack support), core assembly and reset bulletSpring 2 all applies active force vertically to spring base 4, by spring base 4 and the interior circle that arranges of sliding seat 6The locating hole of taper matches with spheroid 10, forms sphere-contact, can guarantee that spring base 4 is stressed evenly,Make 4 of spring bases be subject to axial force, be not subject to diametral interference, prevent from being subject to radial load to cause back-moving spring 2 stuckOr flexural deformation, improves reliability.
As shown in Figure 11 and Figure 12, be the valve pad 7 of plane for two ends end face, one end of valve pad 7 towardsSealing, and this end end face of valve pad 7 is the plane perpendicular with the axis of liquid inlet joint 8, works as safety valveWhile opening overflow, when liquid flows out when overflow, produce shear flow, the center position of valve pad 7 can form vacuumNegative pressure pulling force, can cause valve pad 7 pull-outs to be lost efficacy, and affects the reliability of safety valve.
Therefore,, as distortion embodiment, as shown in FIG. 13 to 15, valve pad 7 is for adopting polyurethane systemThe circular block structure becoming, one end of valve pad 7 is towards sealing, and this end end face of valve pad 7 is by oneInner bottom surface 71 and a sealing surface 72 form, and this end end face of valve pad 7 forms towards valve pad 7 internal recessSunk structure 73. Sealing surface 72 is for having the annular plane of centre bore, and sealing surface 72 is for secondThe internal face contact of accommodating cavity 53, and for keeping in touch with the end face of the first shaft part 82 of liquid inlet joint,Inlet opening is closed. Inner bottom surface 71 is arranged in the centre bore of sealing surface 72, and both are coaxial, and the interior endThe inner edge of the outer rim of face and sealing surface 72 is connected to form complete end face. As preferably, inner bottom surface 71 isSphere, forms a ball recess towards internal recess in the center, end of valve pad 7, forms depressionStructure 73. Sealing surface 72 is to realize sealing for matching with liquid inlet joint, and the overall diameter of sealing surface 72 is notBe less than the diameter of the second accommodating cavity 53, the overall diameter of sealing surface 72 is greater than the overall diameter of the first shaft part 82, closeThe interior diameter of front cover 72 is not more than the overall diameter of the first shaft part 82, guarantees like this sealing in the time that safety valve cuts outFace 72 can keep in touch with the end face of the first shaft part 82, and inlet opening is closed.
For the valve pad 7 with sunk structure, as shown in figure 14, because valve pad 7 has inner concave arc surface effect,Highly pressurised liquid from liquid inlet joint can be divided into axial thrust load Fn and radial component Fr, component Fr on curved surfaceUnder the acting in conjunction of the directed force F a being produced by support member at cylindrical and the back side and Fb, butt joint sealingPosition produces extruding force, and increases with fluid pressure, and plane valve pad just can not produce such effect,Therefore compare and there is no the valve pad of sunk structure (shown in Fig. 9), can bear higher pressure. As Figure 15Shown in, when safety valve is opened and when large flow overflow, valve pad is because of the reflex of inner concave arc surface, mobile heightPress liquid produces unordered disorder and flows in the central area of valve pad, the mobile pressure fluid pair of this unordered disorderValve pad contact-making surface forms lasting pressure-acting, makes stable being pressed on supporting surface behind of valve pad; IfValve pad surface is in the situation of plane, and when overflow, liquid can directly radially flow out, and at valve pad centerPosition forms negative pressure of vacuum region, and the liquid of this negative pressure region can produce pulling force effect and cause valve pad valve padLeave supporting surface behind and cause seal failure until be drawn out damage.
Sunk structure 73 except be spherical, can also be other shapes, as shown in figure 16, as to figureThe distortion embodiment of valve pad shown in 13, the structure of the valve pad 7 of this structure is with respect to valve pad shown in Figure 13Structure difference is in the shape difference in sunk structure 73, and remainder is all identical. The valve pad 7 of this structureSunk structure 73 be cone-shaped groove, inner bottom surface is to be made up of male cone (strobilus masculinus) 74 and baseplane 75, male cone (strobilus masculinus)74 is taper seat, and male cone (strobilus masculinus) 74 is arranged in the centre bore of sealing surface 72, and both are coaxial, and male cone (strobilus masculinus) 74Outer rim is connected with the inner edge of sealing surface 72. Male cone (strobilus masculinus) 74 has bigger diameter end and miner diameter end, male cone (strobilus masculinus) 74 largeFootpath end is connected with the inward flange of sealing surface 72, and miner diameter end is connected with the outward flange of baseplane 75. Baseplane 75For the disk coaxial with sealing surface 72, baseplane 75 is arranged in the centre bore of male cone (strobilus masculinus) 74, and both are coaxial,And the outer rim of male cone (strobilus masculinus) 74 is connected with the bigger diameter end outer rim of inner conical surface 73, and forms complete with sealing surface 72End face. The valve pad of structure shown in Figure 16 has identical effect with the valve pad of structure shown in Figure 13, as Figure 17Shown in Figure 18, do not repeat them here.
Below by reference to the accompanying drawings the present invention is exemplarily described. Obviously, specific implementation of the present invention is not subject toThe restriction of aforesaid way. As long as the various non-reality that has adopted method design of the present invention and technical scheme to carry outThe improvement of matter; Or without improvement, above-mentioned design of the present invention and technical scheme are directly applied to otherClose, all within protection scope of the present invention.
Claims (8)
1. the core assembly of safety valve, is characterized in that: comprise sliding seat, be arranged at the swivel nut in sliding seatWith the valve pad being arranged in swivel nut and for matching with the liquid inlet joint of safety valve, valve pad has sunk structure.
2. the core assembly of safety valve according to claim 1, is characterized in that: described liquid inlet jointComprise the joint body being connected with the valve body of safety valve and be fixedly connected with joint body and with described nut andThe sealing that valve pad matches, liquid inlet joint has inlet opening, and valve body has outage.
3. the core assembly of safety valve according to claim 1, is characterized in that: described valve pad is by instituteState sliding seat and described swivel nut is fixedly clamped.
4. the core assembly of safety valve according to claim 2, is characterized in that: described swivel nut hasFor hold described sealing the first accommodating cavity and hold described valve pad and be communicated with the first accommodating cavity secondAccommodating cavity, described sliding seat has the 3rd accommodating cavity that holds swivel nut.
5. the core assembly of safety valve according to claim 2, is characterized in that: described sliding seatEnd face is provided with the first oil duct for fluid being guided to outage, the end face of described swivel nut be provided with forFluid is guided to the second oil duct of the first oil duct, when described valve pad and described hermetic unit from after, described in enterFluid in liquid hole flow to described outage place through the second oil duct, the first oil duct successively.
6. the core assembly of safety valve according to claim 5, is characterized in that: described the first oil duct,The second oil duct and described outage are positioned on the same RADIAL of described valve body.
7. the core assembly of safety valve according to claim 5, is characterized in that: described sealing isCan embed in the first accommodating cavity of described swivel nut and the ledge structure contacting with described valve pad, described second accommodatingThe diameter in chamber is greater than the diameter of the first accommodating cavity.
8. the core assembly of safety valve according to claim 5, is characterized in that: described sealing toolHave and set gradually and the first shaft part and the second shaft part that overall diameter increases gradually, the second shaft part and described joint thisBody is fixedly connected with, and the first shaft part matches with described valve pad, and the overall diameter of the first shaft part is not more than describedThe diameter of one accommodating cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610051829.3A CN105604586A (en) | 2016-01-25 | 2016-01-25 | Valve element assembly of safety valve |
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| CN201610051829.3A CN105604586A (en) | 2016-01-25 | 2016-01-25 | Valve element assembly of safety valve |
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Citations (8)
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|---|---|---|---|---|
| CN2242376Y (en) * | 1995-12-11 | 1996-12-11 | 姜立 | Valve for LPG bottle |
| CN2298390Y (en) * | 1997-04-24 | 1998-11-25 | 柳州第二空气压缩机总厂 | Safety valve |
| CN2388434Y (en) * | 1999-04-20 | 2000-07-19 | 刘洪刚 | Stop valve for gas pipeline |
| CN201474710U (en) * | 2009-04-30 | 2010-05-19 | 王润宏 | Large-flow relief valve |
| DE202009004753U1 (en) * | 2009-04-29 | 2010-09-16 | Bucyrus Europe Gmbh | Pressure relief valve |
| CN202469103U (en) * | 2012-03-07 | 2012-10-03 | 浙江华东矿用设备有限公司 | Safety valve |
| CN104153795A (en) * | 2014-08-06 | 2014-11-19 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
| CN204677839U (en) * | 2015-06-12 | 2015-09-30 | 宁德景腾橡胶工业有限公司 | A kind of spring micro-opening closes high voltage type Decompression valves |
-
2016
- 2016-01-25 CN CN201610051829.3A patent/CN105604586A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242376Y (en) * | 1995-12-11 | 1996-12-11 | 姜立 | Valve for LPG bottle |
| CN2298390Y (en) * | 1997-04-24 | 1998-11-25 | 柳州第二空气压缩机总厂 | Safety valve |
| CN2388434Y (en) * | 1999-04-20 | 2000-07-19 | 刘洪刚 | Stop valve for gas pipeline |
| DE202009004753U1 (en) * | 2009-04-29 | 2010-09-16 | Bucyrus Europe Gmbh | Pressure relief valve |
| CN201474710U (en) * | 2009-04-30 | 2010-05-19 | 王润宏 | Large-flow relief valve |
| CN202469103U (en) * | 2012-03-07 | 2012-10-03 | 浙江华东矿用设备有限公司 | Safety valve |
| CN104153795A (en) * | 2014-08-06 | 2014-11-19 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
| CN204677839U (en) * | 2015-06-12 | 2015-09-30 | 宁德景腾橡胶工业有限公司 | A kind of spring micro-opening closes high voltage type Decompression valves |
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Application publication date: 20160525 |