CN205260974U

CN205260974U - Novel case structure

Info

Publication number: CN205260974U
Application number: CN201521137983.XU
Authority: CN
Inventors: 刘宇坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-05-25
Anticipated expiration: 2025-12-30

Abstract

The utility model relates to a novel case structure, including the inside case that sets up of valve body, the peripheral installation case uide bushing of case, the conical surface top of case tip is advanced on the jiao kou and sealed through this conical contact the valve body, the case uide bushing is equipped with the diaphragm with the valve body department of meeting, has the arc surface on the diaphragm. The utility model discloses beneficial effect does: spool position cancellation elevated -temperature seal is enclosed and is used the high temperature resistance diaphragm to replace to having avoided sealing washer shrink under the effect of high temperature hot melt adhesive, also having avoided case wear out failure in the motion process, the life -span of diaphragm is also more permanent.

Description

A kind of Novel valve core structure

Technical field

The utility model relates to valve technology field, relates in particular to one and for low pressure molding technique, injection moulding is pressedThe Novel valve core structure of power control.

Background technology

Safety valve is that opening and closing element is subject under External Force Acting in normally off, when the pressure medium in equipment or pipelineWhen rising exceedes setting, prevent that by discharge medium outside system in pipeline or equipment, pressure medium exceedesThe Special valve of specified value. Safety valve belongs to automatic valve class, is mainly used in boiler, pressure vessel and pipelineUpper, controlled pressure is no more than setting, and personal safety and equipment have been moved to important protective effect.

Conventional security valve is by valve body, spool, high-temperature seal ring, push rod, chain connected nut, cylinder support column, gasThe compositions such as cylinder piston, cylinder block. First,, because PUR serviceability temperature is higher, normal temperature can reach 235DEG C, the sealing ring that uses fluorubber or other high temperature material to make, can bear 250 DEG C of high temperature in theory,But due to spool frequent activity, add that PUR use for a long time can occur aging, caking, the hard spot meeting of generationBe adsorbed on valve body, seals and other component, thereby make O type circle wearing and tearing, shrink, the stuck or hot melt of spoolGlue leaks and finally causes safety valve to lose efficacy; Secondly, high-temperature seal ring, for a long time 230 DEG C of work, is easily receivedContracting, finally also causes spool place PUR to leak and lost efficacy.

Therefore,, for above aspect, need to reasonably improve prior art.

Utility model content

For above defect, the utility model provides a kind of Novel valve core structure, high to solve existing sealing ringThe lower easy contraction of temperature, wearing and tearing, aging and cause and leak the defects such as glue is stuck.

For achieving the above object, the utility model is by the following technical solutions:

A kind of Novel valve core structure, comprises the spool that valve inner arranges, valve body outer end by attaching nut withThe melten gel cylinder block of hot melt adhesive machine is joined, and cylinder block outer end is with air inlet, and spool is installed in described spool peripheryFairlead, the conical surface of spool end withstands on the glue-feeder of valve body and by this conical surface contact sealing; DescribedSpool fairlead and valve body joint are provided with barrier film, on barrier film with arc surface.

Correspondingly, the glue-feeder of described valve end is communicated with injection machine runner, valve body with pressure relief opening andThis pressure relief opening communicates with the melten gel position low-pressure area of melten gel.

Between described cylinder block and attaching nut, be fixedly installed cylinder supports post.

The beneficial effect of Novel valve core structure described in the utility model is: by cancelling high temperature at spool positionSealing ring and use resistant to elevated temperatures barrier film to replace, thus avoid sealing ring to shrink under the effect of high temperature PUR,Also avoided spool wear out failure in motion process; In the time that spool is movable to the right, PUR enters into barrier filmLeft side, because runner is now connected with the low-pressure side of glue cylinder, therefore, the now pressure of bearing of diaphragm sheetPower is very little, does not have the risk of breaking; When spool left and right is movable, diaphragm sheet is by the circular arc generation bullet of mouldingProperty distortion, has stopped that PUR leaks to spool right side, spool aging and that cause is stuck or safety valve lost efficacy;Meanwhile, fairlead plays guide effect to the activity of spool, makes the conical surface of spool and the conical surface seal of valve body moreReliably, also avoided the inclination of spool to cause diaphragm gauffer, the life-span of diaphragm is also more permanent.

Brief description of the drawings

With reference to the accompanying drawings the utility model is described in further detail below.

Fig. 1 is the spool closed condition schematic diagram of Novel valve core structure described in the utility model embodiment;

Fig. 2 is the spool open mode schematic diagram of Novel valve core structure described in the utility model embodiment;

Fig. 3 is the conventional security valve principle schematic of Novel valve core structure described in the utility model embodiment.

In figure:

1, valve body; 2, spool; 3, barrier film; 4, spool fairlead; 5, push rod; 6, attaching nut; 7,Cylinder supports post; 8, cylinder piston; 9, cylinder block; 10, glue-feeder; 11, air inlet; 12, pressure releaseMouthful.

Detailed description of the invention

As shown in Figure 1-2, the Novel valve core structure described in the utility model embodiment, comprises valve body 1 insideThe spool 2 arranging, the peripheral spool fairlead 4 of installing of described spool 2, described valve body 1 outer end is by connecting spiral shellFemale 6 join with the melten gel cylinder block 9 of hot melt adhesive machine, and the glue-feeder 10 of valve body 1 end connects with injection machine runnerLogical, valve body 1 communicates with the melten gel position low-pressure area of melten gel with pressure relief opening 12 and this pressure relief opening 12; WithTime, in described cylinder block 9 inner chambers, cylinder piston 8 be set and on cylinder piston 8, fixedly mount push rod 5,Between described cylinder block 9 and attaching nut 6, be fixedly installed cylinder supports post 7, cylinder block 9 outer ends are with enteringGas port 11; Correspondingly, described spool fairlead 4 is provided with barrier film 3 and this barrier film 3 with valve body 1 jointMutually vertical with spool 2.

Novel valve core structure described in above the utility model embodiment, when work, compressed air passes through cylinderThe air inlet 11 of body 9 enters in cylinder, and the air pressure of air inlet 11 is accurately controlled by precise pressure regulating valve,Thereby can calculate the active force acting on cylinder piston 8; Cylinder piston 8 is connected with push rod 5, topBar 5 withstands on spool by bulb, reduces contact area, reduces the heat transmitting; The cone at spool 2 topsFace withstands on the glue-feeder of valve body 1, contacts sealing by the conical surface; Due to glue-feeder 10 left sides and injection machineHigh pressure runner is connected, and therefore, PUR can have an active force to the right, effect to the right to spool 2Power also can calculate by the area of the pressure of PUR and glue-feeder 10.

Definition:

F1: PUR is to spool active force to the right;

F2: cylinder piston active force left;

A1: glue-feeder flow area;

A2: cylinder piston area;

P1: PUR runner internal pressure;

P2: cylinder piston inner air pressure;

In the time of F2 > F1, the spool conical surface withstands on valve body, and PUR can not reflux, and pressure can rise;

In the time of F2 < F1, spool moves right, and PUR refluxes, pressure drop;

In the time of F2=F1, spool is in poised state;

Now, F1=F2, that is: P1*A1=P2*A2,

: P1=P2 (A2/A1)

P2 can pass through accurate voltage regulating valve regulation control, and A1, A2 time draw by design, thereby can lead toOverregulate P2 and control P1 value.

In the time that spool is movable to the right, PUR enters into the left side of barrier film, due to runner now with glue cylinderLow-pressure side is connected, and therefore, now the pressure bearing of diaphragm sheet is very little, does not have the risk of breaking; SpoolWhen left and right is movable, diaphragm sheet, by the circular arc generation strain of moulding, has been stopped PUR to spool right sideLeak, spool aging and that cause is stuck, safety valve lost efficacy.

Meanwhile, fairlead plays guide effect to the activity of spool, makes the conical surface of spool and the conical surface of valve body closeSeal more reliably, also avoided the inclination of spool to cause diaphragm gauffer, therefore the life-span of diaphragm is also more permanent.

As shown in Figure 3, the Novel valve core structure described in the utility model embodiment, conventional security valve seal is formerReason is for being used high-temperature resistant seal ring to be arranged on spool, and high temperature PUR can be aging after using a period of time,The hard spot producing can be adsorbed on valve body, sealing ring etc., thereby causes ring wear, and PUR leaks,Finally cause safety valve to lose efficacy; Secondly, high-temperature seal ring, for a long time 230 DEG C of work, easily shrinks, finalAlso cause spool place PUR to leak and lost efficacy.

The above-mentioned description to embodiment is can to understand and answer for the ease of those skilled in the artUse this case technology, person skilled in the art obviously can make various amendments to these examples easily, andGeneral Principle described herein is applied in other embodiment and needn't passes through performing creative labour. Therefore,This case is not limited to above embodiment, and those skilled in the art, according to the announcement of this case, makes for this caseImproving and revise all should be in the protection domain of this case.

Claims

1. a Novel valve core structure, comprises the inner spool (2) arranging of valve body (1), outside valve body (1)End joins with the melten gel cylinder block (9) of hot melt adhesive machine by attaching nut (6), cylinder block (9) outer end bandThere is air inlet (11), it is characterized in that: peripheral spool fairlead (4), the spool installed of described spool (2)(2) it is upper and by this conical surface contact sealing that the conical surface of end withstands on the glue-feeder (10) of valve body (1);Described spool fairlead (4) is provided with barrier film (3) with valve body (1) joint, and barrier film (3) is upper with circular arcFace.

2. Novel valve core structure according to claim 1, is characterized in that: described valve body (1) endThe glue-feeder (10) of portion is communicated with injection machine runner, and valve body (1) is with pressure relief opening (12) and this pressure releaseMouth (12) communicates with the melten gel position low-pressure area of melten gel.

3. Novel valve core structure according to claim 1, is characterized in that: described cylinder block (9)And between attaching nut (6), be fixedly installed cylinder supports post (7).