CN2120942U - Lift one-way check valve - Google Patents

Abstract

The utility model discloses a one-way check valve. A valve rod is respectively in sliding supporting on a valve body and a supporting seat in two points through the supporting seat which is arranged in the input cavity of the valve body, wherein, both sides of the supporting seat are respectively provided with a damping hole and a pressure sharing hole. A damping cavity is arranged in the supporting seat, and a valve hole is arranged in the valve rod. A valve core with a valve pad seals and presses the valve hole under the action of a spring. The damping cavity is rapidly filled when the medium is in the positive pressure, and the valve block is rapidly opened. When the medium is reversed in the negative pressure, a valve block is dropped down. A through hole in the valve, the pressure sharing hole and the damping hole of the supporting seat simultaneously and smoothly draine the medium in the damping cavity at first, and then the damping hole smoothly draines the medium in the damping cavity. The damping is obvious, and meanwhile the valve block and the stopping opening of the valve body are provided with sealing rings.

Description

Lift one-way check valve

The utility model relates to a kind of one way stop peturn valve body, especially a kind of one way stop peturn valve body that belongs to rise-fall type.

At present, common one way stop peturn valve body on the market, be divided into two types substantially, a kind of is Swing check valve, its major character is, in valve body, a kind of folk prescription of realizing is set to the valve block that opens and closes, this valve block is connected with the valve body hinge with an end, valve block can be made folk prescription and start shipment moving to 90 ° of commentaries on classics in valve body, when the valve body working medium is imported with certain pressure from input end, back down valve block, making valve block is basic point with an end hinge, Open valve, the working medium circulation, flow to defeated not-go-end, when the output terminal working medium pressure is made reverse flow greater than the input end desire, the rotary valve valve block is rotated and is fallen, and pushes down the valve seam, realizes that non-return turn-offs, it is higher that the one way stop peturn valve working state changes frequency in real work, so in the prior art, valve block and valve body seam are all pressed the pressing ring that Cu alloy material is made, pressing valve body seam with edge usually, both the phenomenon that occurs leaking to keep the unlikely oxidation corrosion of stop portion as far as possible simultaneously also had certain non-rigid buffering and hit effect; The one way stop peturn valve of another type promptly is common rise-fall type one way stop peturn valve, this one way stop peturn valve, usually all be that body end at whole valve covers and supporting a valve rod, valve rod is ined succession or is being driven valve block and relies on own wt, and the valve block seam in the valve body in pressing, when the valve body working medium relies on certain pressure from input end, overcome the gravity of valve block one, just back down valve block, make the medium circulation, export from the valve body output terminal.When in a single day pressure medium did not overcome valve block one gravity, the valve block one fell according to center of gravity, covered the valve body seam, finished the work that medium turn-offs.Otherwise greater than input end pressure, because the folk prescription of valve body seam is to effect, working medium can not circulate as output end pressure.Above-mentioned two types one-way valve, for the rotary-open type valve body structure, because one way stop peturn valve work inversion frequency is higher, so valve block and the identical of valve body seam are had relatively high expectations, leakage phenomenon is difficult to avoid; For rise-fall type valve body structure of the prior art, " water hammer " phenomenon is very serious, because " water hammer " impacts great efforts, so valve block is extremely short working life, durability is poor, and operating noise is big, is difficult to be suitable for the needs of producing reality.

The utility model then is the above deficiency at prior art, provides a kind of durable in use, easy to maintenance, noiseless, and the long lifetime, existing very high manufacturing efficiency has the one way stop peturn valve body of medium damping function again, with the update as prior art.

Scheme of the present utility model is achieved like this, on existing rise-fall type one way stop peturn valve basis, assemble on one and the supporting base that be positioned at input cavity at the valve body end cap with valve body by 2 sliding bearings with the valve rod of valve block together with one.The interior bottom of this supporting base, space beyond the valve handle activity stroke, be provided with a damping cavity, the supporting base bi-side are respectively equipped with damping hole and dividing potential drop hole, damping hole communicates with damping cavity all the time in the supporting base bottom, dividing potential drop pore-throat mouth and supporting base and valve rod cunning are joined the hole inner face and are intersected, and hole heart height is positioned at when valve block is in the limit position of cut-off valve body seam, because valve rod cylinder bottom is lower than the dividing potential drop hole, can pass through valve rod cylinder involution dividing potential drop aperture, the hole heart height of damping hole is lower than the dividing potential drop position, and the aperture of damping hole is less than the dividing potential drop hole; Open and close by the spring roof pressure together with valve pad with a small valve core with being provided with a little valve opening, little valve opening in the valve rod bottom bar of valve block together with one, spring then relies on a blind nut to support the envelope location.A distance, upper end of little valve opening is communicated with input cavity by the two-way crossing through hole of axial-radial in the valve rod in valve rod.In valve block and pressing place of valve body seam, valve block and valve body all co-located are provided with a step, the thin type seal ring of making at the material that plastically deformable is installed with the step place, valve block and valve body seam leave assemblage gap, its gap numerical quantity is less than thin type seal ring existing amount of plastic deformation of plastic material when falling according to valve block, thereby when valve block was changed in working order, its main contact force can be passed through the thin type seal ring, bears indirectly in the valve body seam.

Compared with prior art, the utility model is owing to utilize the medium damping function preferably, therefore valve body working state transfer speed is fast, operate steadily, it is big to have improved in the prior art noise fully, and " water hammer " impacts serious, life-span is short, easy leakage defect, production technology processing is easy, and cost of production also decreases.

Accompanying drawing is the utility model embodiment's a generalized section

Again the utility model is done the explanation of detailed operation principle below in conjunction with embodiment's accompanying drawing.

When the working medium positive pressure, working medium is entered by input cavity 1, with valve rod 2 together with the valve block 3 of one because of the positive pressure unblank, working medium flows to output cavity 4 by input cavity 1, this moment, working medium communicated with damping cavity 7 owing to valve rod supporting base 5 side damping holes 6, filled full water so damping cavity 7 progressively rises with valve block 3.When valve rod 2 bottom ends rise to above 8 positions, dividing potential drop hole, dividing potential drop hole 8 is also simultaneously to damping cavity 7 water fillings, when valve block 3 rates of climb are very fast, also therefore negative pressure value is higher in the damping cavity 7, cause in the valve rod 2 the small valve core 11 that has the valve pad 10 that plastic material makes in the little valve openings 9 under the gland effect, to begin to overcome the top power of spring 12, little valve opening 9 breakdowns, working medium is adjusted chamber 15 synchronously by through hole 13 beginnings that communicate with input cavity 1 in off normal slotted eye 14 flows through valve rod 2, import damping cavity 7, quicken valve block 3 breakdown speed, make it to reach ideal effect.

When the working medium backpressure, be that working medium is entered by output cavity 4, begin be cut-off valve body seam 16 trend together with the valve block 3 of one because of backpressure with valve rod 2, this moment, damping cavity 7 and coupled logical adjustment chamber 15 negative pressure value disappeared, spring 12 returns to normal and suppresses small valve core 11, rely on the little valve opening 9 in valve pad 10 envelope positions, working medium is no longer mobile in the through hole 13, and the working medium in the damping cavity 7 is because valve block 3 whereabouts, mainly then drain to input cavity 1 by dividing potential drop hole and damping hole 6, when dropping under the bottom end of valve rod 2 under the dividing potential drop hole 8, when the cylinder of valve rod 2 is blocked dividing potential drop hole 8, working medium in the damping cavity 7 only can rely on 6 one apertures of damping hole to drain to input cavity, thereby realize damping function well.When valve block 3 during soon near valve body seam 16, what at first touch valve block 3 then is the surface that is connected thin type seal ring 17 on the valve body seam 16, and valve block 3 leaves 0.3～2mm assemblage gap C with valve body seam 16, because the Manufacturing material of the thin type seal ring 17 fit up gap C that amount of plastic deformation leaves less than valve block 3 and valve body seam 16 when falling according to valve block 3, therefore valve block 3 press the valve body 18 that falls is mild, has overcome " water hammer " phenomenon fully.Simultaneously, make valve block phenomenal growth in 3 working life.

Claims (2)

1, a kind of rise-fall type one way stop peturn valve is made up of the valve rod 2, supporting base 5, valve body 18, input cavity 1, the output cavity 4 that fuse with valve block 3, it is characterized in that:

(1) valve rod 2 that fuses with valve block by 2 sliding bearings valve body 18 end caps and with the supporting base 5 of valve body 18 assembling one on, supporting base 5 is positioned at input cavity 1;

(2) space of bottom beyond valve rod 2 movable strokes in the supporting base 5, be provided with a damping cavity 7, supporting base 4 bi-side are respectively equipped with damping hole 6 and dividing potential drop hole 8, damping hole 6 communicates with damping cavity 7 all the time in supporting base 5 bottoms, the hole heart position height in dividing potential drop hole 8 is positioned at when valve block 3 is in cut-off valve body seam 16 limit positions, the cylinder bottom of valve rod 2 is lower than dividing potential drop hole 8, and damping hole 6 hole heart height are lower than the position in dividing potential drop hole 8, and the aperture of damping hole 6 is less than dividing potential drop hole 8;

(3) bottom is provided with a little valve opening 9 in valve rod 2 bars, and the small valve core 11 that has valve pad 10 is complied with in adjusting chamber 15 with the little valve opening 9 of spring 12 elastic force glands; Adjust in the chamber 15 and be provided with off normal slotted eye 14.Be connected with input cavity 1 through damping cavity 7 and through hole 13 respectively;

(4) valve block 3 and 16 pressings place of valve body seam all co-located be provided with step, the step place is equipped with the thin type seal ring 17 that plastic material is made, valve block 3 leaves 0.3～2mm assemblage gap C, the amount of plastic deformation that its gap numerical value exists when falling according to valve block 3 less than thin type seal ring 17 with valve body seam 16;

2, according to the described one way stop peturn valve of claim 1, it is characterized in that: the valve pad 10 usefulness plastic materials that bottom small valve core 11 is had in the valve rod 2 are made.

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