CN202284679U

CN202284679U - Corrugated pipe stop valve

Info

Publication number: CN202284679U
Application number: CN2011203896681U
Authority: CN
Inventors: 付仕学
Original assignee: GAODONG VALVE CO Ltd
Current assignee: GAODONG VALVE CO Ltd
Priority date: 2011-10-14
Filing date: 2011-10-14
Publication date: 2012-06-27
Anticipated expiration: 2021-10-14

Abstract

The utility model relates to a stop valve, provides a corrugated pipe stop valve with the advantages of simple structure, good tightness, high reliability and long service life, and solves the technical problems that the stop valve in the prior art is poor in tightness and low in reliability. The corrugated pipe stop valve includes a valve body, and a valve cover covering the valve body, wherein a valve rod lifting nut is arranged on the valve cover, a valve rod is screwed and connected on the valve rod lifting nut, the inner side end of the valve rod extends to the interior of the valve body and is connected with a valve clack, the valve clack is rotationally connected on the valve rod, the lower end of the valve rod is sleeved and covered with a corrugated pipe, the upper end of the corrugated pipe is hermetically connected with the valve cover, a clearance is reserved between the middle part of the corrugated pipe and the valve rod, the lower end of the corrugated pipe is held on the valve clack and is hermetically connected with the valve clack, and a radial positioning pin for limiting the rotation of the valve rod is arranged on the valve cover.

Description

Bellows stop valve

Technical field

The utility model relates to a kind of stop valve, relates in particular to a kind of good airproof performance, is particularly useful for carrying the bellows stop valve on the danger medium pipelines such as poisonous and harmful.

Background technique

Stop valve is mainly used in cut-out, closes ducted medium and regulates ducted rate-of flow; Wherein sealing is to estimate the important indicator of stop valve reliability; Stop valve in particular on the danger medium pipelines such as conveying poisonous and harmful requires to guarantee the medium zero leakage.In order to prevent dielectric leakage; Stop valve commonly used is normally dosed certain filler at valve rod and valve cover chamber; But since valve opening or when closing the relative filler of valve rod move up and down, cause filler very easily to wear and tear, therefore need constantly tighten the sealing that gland on the filler could guarantee valve; Using process is loaded down with trivial details, poor reliability.

Chinese patent discloses a kind of bellows stop valve (CN201162839Y); It comprises valve body, spool, valve rod, valve gap and bellows; Put bellows in stem lower portion, the fixed seal connection of bellows lower end mainly is that the bellows upper end is fixed between valve body and the valve gap through a ripple cap on spool; Fixed seal connection between bellows and the ripple cap; When valve rod moves, but utilize the elastic reaction of ripple cap to make bellows upper end elastic floating, thereby the tensile fatigue that reduces bellows in the valve opening and closing process damage.Though this device is through the suit bellows solves the sealing problem of valve in the lower end of valve rod; But because the bellows in the device tightly is enclosed within on the valve rod; When therefore valve rod goes up and down repeatedly, because valve rod and bellows friction not only cause the valve opening and closing difficulty; And very easily causing bellows to leak after the bellows inner wall abrasion, reliability reduces.Simultaneously because the spool in this device is fixed on the valve rod bottom; Very easily tilt under the effect of pipeline internal medium owing to valve rod during use to outlet side; Therefore when sluice gate sealing surface corresponding on the relative valve body of valve core sealed cover tilts, directly cause sluice gate to be not closed completely, cause valves leakage.

Summary of the invention

The utility model has provided mainly that a kind of simple in structure, good airproof performance, reliability are high, the bellows stop valve of long service life, the technical problem that has solved that the stop valve sealing that exists in the existing technology is poor, reliability is low etc.

The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals: a kind of bellows stop valve, and comprise valve body and cover at the valve gap on the valve body, on said valve gap, be provided with the valve rod lifting nut; Be connected with valve rod on the valve rod lifting nut; The medial extremity of said valve rod extends in the valve body and links to each other with flap, and said flap is rotatably connected on the valve rod, and cover is covered with bellows in the lower end of said valve rod; The upper end of bellows links to each other with valve gap is airtight; The middle part and the valve rod of bellows are provided with the gap, and the lower end of said bellows is clamped on the flap and with flap is airtight and links to each other, and on said valve gap, are provided with to limit the radial location pin that valve rod rotates.Through the shroud bellows in the lower end of valve rod, and an end of bellows is connected with valve gap is airtight, and the other end is connected with flap is airtight, thereby makes the medium in the valve body can't carry over valve rod upwards, and promptly bellows has been blocked medium and valve body leakage way outward, and is simple in structure; When the stressed generation of valve rod was squinted, because flap is rotatably connected on the valve rod, flap got final product automatically and the levelling of sluice gate sealing surface, sluice gate can normally be closed all the time, thereby avoided valves leakage phenomenon, good airproof performance; Through between the middle part of bellows and valve rod, the gap being set; Thereby reduced the friction between bellows and valve rod when valve rod goes up and down repeatedly, not only made valve opening and closing free and relaxed, and reduced abrasion of corrugated pipe; Prolong the working life of stop valve, and improved the reliability of valve; Can limit the radial location pin that valve rod rotates through on valve gap, being provided with, prevent to rotate when valve rod from going up and down, guarantee that the bellows two ends keep sealing state.

As preferably, on corresponding to the valve rod in the valve body, be with sub-gasket, said sub-gasket is folded between valve body and the valve gap, and the lower end of said bellows is welded on the flap, and the upper end of said bellows is welded on the sub-gasket.Through establishing sub-gasket at valve body and valve cover chamber folder, the upper end of bellows is connected on the sub-gasket, makes things convenient for the installation of bellows; The two ends of bellows are fixing through welding, and Placement is simple and reliable, and the two ends of guaranteeing bellows are respectively with flap and sub-gasket is airtight is connected.

As more preferably, be provided with annular groove in inboard corresponding to valve body and valve gap fitting surface, said sub-gasket is inlaid in the annular groove, and is folded with Upper gasket at sub-gasket end face and valve cover chamber, between sub-gasket bottom surface and valve body, is folded with lower levelling plate.Inboard through at valve body and valve gap fitting surface processes an annular groove, and promptly annular groove is surrounded jointly by valve body and valve gap and forms, and sub-gasket is inlaid in the annular groove and is clamped between valve body and the valve gap, and means of fixation is simple and reliable; Upper and lower pad can avoid medium from the upper and lower surfaces of sub-gasket to external leakage, improve the sealing of valve.

As more preferably; Said sub-gasket comprises positioning ring and the coaxial guide ring that is connected positioning ring one end of integral type; Said positioning ring is folded between valve body and the valve gap; Said guide ring is provided with counterbore downwards towards flap on the lower end surface corresponding to guide ring, said bellows extends in the counterbore.Sub-gasket is clamped between valve body and the valve gap through positioning ring; The upper end extension of bellows is arranged on the counterbore on the guide ring; Bellows carried over the compression of counterbore direction when valve rod was risen; Avoid bellows generation deflection, guarantee that the bellows inwall can not produce friction with valve rod, reduces the valve opening resistance.

As preferably; Said flap comprise with valve body on the sluice gate valve flap with conical head of joining mutually; Middle part, bottom surface at the valve flap with conical head vertically is connected with connecting rod; The valve flap with conical head is that integral type is connected with connecting rod, is provided with the location counterbore on the top of said connecting rod, and said valve rod is plugged in the counterbore of location and through horizontal bearing pin and is rotationally connected.Through valve flap with conical head and the mutual timing good airproof performance of sluice gate; Valve rod is rotatably connected on through horizontal bearing pin in the location counterbore on top of connecting rod, and Placement is simple.

As preferably, the medial extremity of said radial location pin radially is plugged on the valve rod, on said valve gap, is provided with the axial slide corresponding with the radial location pin, and the outboard end of said radial location pin is slidingly connected in the axial slide.One end of radial location pin is plugged on the valve rod, and the other end is slidingly connected in the axial slide corresponding on the valve gap, and when valve rod went up and down, the radial location pin carried over axial slide and slides up and down, thereby has avoided the valve rod circumferencial direction to rotate, and is simple in structure.

Therefore, the bellows stop valve of the utility model has following advantage: through the shroud bellows in the lower end of valve rod, the two ends of bellows are connected with sub-gasket and flap are airtight respectively; Make the medium in the valve body can't be from the fitting surface of valve rod to the valve body external leakage; Because flap is rotatably connected on the valve rod, flap can be automatically and the levelling of sluice gate sealing surface, makes sluice gate can guarantee all the time normally to close; Simple in structure, good airproof performance; Between bellows and valve rod the gap is set, has reduced the friction between bellows and valve rod, not only make valve opening and closing light, and, reduced abrasion of corrugated pipe, prolonged the working life of stop valve, reliability is high.

Description of drawings:

Fig. 1 is the structural representation of the utility model bellows stop valve.

Embodiment:

Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technological scheme of the utility model.

Embodiment:

As shown in Figure 1; A kind of bellows stop valve of the utility model comprises the liquid entering hole and the valve body between the liquid outlet 1 that are communicated in liquid medium through valve channel, above valve body 1, through bolt a valve gap that is connected with valve channel 2 is arranged; Valve rod lifting nut 4 of setting-in on valve gap 2; Valve rod lifting nut 4 can freely rotate on valve gap 2, the valve rod 3 that on valve rod lifting nut 4, spins, and the flap 6 of valve channel capable of blocking is fixedly linked in the medial extremity of valve rod 3 and the valve body 1; The outboard end of valve rod 3 links to each other with the handwheel that is positioned at valve gap 2 tops; The radial location pin 7 of radially pegging graft at the middle part of valve rod 3 has an axial slide 8 on the valve gap 2 corresponding with radial location pin 7, the outboard end of radial location pin 7 is slidingly connected in the axial slide 8.Flap 6 comprise with valve body 1 inner valve body passage on the sluice gate 11 valve flap with conical head 61 of joining mutually; At connecting rod 62 of the vertical connection in the middle part, bottom surface of valve flap with conical head 61; Both connect for integral type; Top middle portion at connecting rod 62 has a location counterbore 63, and the lower end of valve rod 3 is plugged in the location counterbore 63 and through a horizontal bearing pin 10 and is rotationally connected with flap 6.Bellows 9 of processing by stainless steel material of shroud in the lower end of valve rod 3; The lower end shroud of bellows 9 also is clamped in outside the connecting rod 62; And the lower loop of bellows 9 is welded on the bottom surface of valve flap with conical head 61, and guarantees that the lower end mouth of bellows 9 and 6 maintenances of flap are airtight.Inboard corresponding to valve body 1 and valve gap 2 fitting surfaces has an annular groove 12; On corresponding to the valve rod above the bellows 93, be with a sub-gasket; Sub-gasket comprises positioning ring 51 and the coaxial guide ring 52 that is connected on positioning ring 51 lower end surfaces of integral type, and positioning ring 51 is inlaid in the annular groove 12 and upper and lower surfaces is clamped between valve body 1 and the valve gap 2, in order to improve sealing; Upper gasket 13 in positioning ring 51 end faces and an annular of 2 folders of valve gap; Establish the lower levelling plate 14 of an annular in positioning ring 51 bottom surfaces and 1 folder of valve body, coaxially on the lower end surface of guide ring 52 have a counterbore 53, the upper end of bellows 9 extends in the counterbore 53; The top ring solid welding of bellows 9 fixes on the bottom surface of counterbore 53, and guarantees to keep airtight between upper end-hole and the sub-gasket of bellows 9.The gap that keeps 1mm between the internal face of bellows 9 and valve rod 3 outer ring surfaces.

During throttle down, the handwheel on rotary valve rod 3 tops rotates because radial location pin 7 defines valve rod 3; Handwheel drives valve rod 3 straight lines and descends, and valve flap with conical head 61 shutoff of flap 6 lower ends are on the sluice gate on the valve channel 11, because flap 6 is rotatably connected on the valve rod 3; Therefore valve flap with conical head 61 can be adjusted direction automatically; The periphery and sluice gate 11 edges of valve flap with conical head 61 are developed, guarantee that valve leaks phenomenon in can not producing, the medium in the valve channel is isolated in the valve body by bellows 9 fully simultaneously; Medium can't carry over the fitting surface of valve rod 3 and valve gap 2 to external leakage, good airproof performance.

Specific embodiment described herein only is that the design to the utility model illustrates.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.

Claims

1. bellows stop valve; Comprise valve body (1) and cover at the valve gap (2) on the valve body (1); On said valve gap (2), be provided with valve rod lifting nut (4), be connected with valve rod (3) on the valve rod lifting nut (4), the medial extremity of said valve rod (3) extends in the valve body (1) and links to each other with flap (6); It is characterized in that: said flap (6) is rotatably connected on the valve rod (3); Cover is covered with bellows (9) in the lower end of said valve rod (3), the upper end of bellows (9) and airtight linking to each other of valve gap (2), and the middle part of bellows (9) and valve rod (3) are provided with the gap; The lower end of said bellows (9) be clamped in that flap (6) is gone up and with airtight linking to each other of flap (6), on said valve gap (2), be provided with the radial location pin (7) that limits valve rod (3) rotation.

2. bellows stop valve according to claim 1; It is characterized in that: on corresponding to the valve rod (3) in the valve body (1), be with sub-gasket; Said sub-gasket is folded between valve body (1) and the valve gap (2); The lower end of said bellows (9) is welded on the flap (6), and the upper end of said bellows (9) is welded on the sub-gasket.

3. bellows stop valve according to claim 2; It is characterized in that: the inboard corresponding to valve body (1) and valve gap (2) fitting surface is provided with annular groove (12); Said sub-gasket is inlaid in the annular groove (12); And between sub-gasket end face and valve gap (2), be folded with Upper gasket (13), between sub-gasket bottom surface and valve body (1), be folded with lower levelling plate (14).

4. bellows stop valve according to claim 2; It is characterized in that: said sub-gasket comprises positioning ring (51) and the coaxial guide ring (52) that is connected positioning ring (51) one ends of integral type; Said positioning ring (51) is folded between valve body (1) and the valve gap (2); Said guide ring (52) is provided with counterbore (53) downwards towards flap (6) on the lower end surface corresponding to guide ring (52), said bellows (9) extends in the counterbore (53).

5. according to claim 1 or 2 or 3 or 4 described bellows stop valves; It is characterized in that: said flap (6) comprise with valve body (1) on sluice gate (11) the valve flap with conical head (61) of joining mutually; Middle part, bottom surface at valve flap with conical head (61) vertically is connected with connecting rod (62); Valve flap with conical head (61) is connected for integral type with connecting rod (62); Be provided with location counterbore (63) on the top of said connecting rod (62), said valve rod (3) is plugged in the location counterbore (63) and is rotationally connected through horizontal bearing pin (10).

6. according to claim 1 or 2 or 3 or 4 described bellows stop valves; It is characterized in that: on said valve rod (3), be provided with radial location pin (7); On said valve gap (2), be provided with the axial slide (8) corresponding with radial location pin (7), the outboard end of said radial location pin (7) is slidingly connected in the axial slide (8).

7. bellows stop valve according to claim 5; It is characterized in that: the medial extremity of said radial location pin (7) radially is plugged on the valve rod (3); On said valve gap (2), be provided with the axial slide (8) corresponding with radial location pin (7), the outboard end of said radial location pin (7) is slidingly connected in the axial slide (8).