CN102954247A - Ball valve with double radial stem bearings - Google Patents
Ball valve with double radial stem bearings Download PDFInfo
- Publication number
- CN102954247A CN102954247A CN 201110243338 CN201110243338A CN102954247A CN 102954247 A CN102954247 A CN 102954247A CN 201110243338 CN201110243338 CN 201110243338 CN 201110243338 A CN201110243338 A CN 201110243338A CN 102954247 A CN102954247 A CN 102954247A
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- valve rod
- valve
- gland
- packing
- stuffing
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Abstract
The invention relates to a ball valve with double radial stem bearings. The ball valve comprises a valve body, a packing gland, a stem and packing, the packing gland comprises a cover plate and a gland, a packing box and a groove are disposed on the valve body, the gland is inserted into the packing box, the lower portion of the stem is connected with the valve body, and the upper portion of the stem sequentially penetrates through the groove, the packing box and the gland to penetrate out of the packing gland. The stem, the packing box and the gland enclose to form an annular packing cavity, the ball valve further comprises a first radial stem bearing, a second radial stem bearing and two packing gaskets, the first radial stem bearing is sleeved between the gland body and the stem, the second radial stem bearing is sleeved between the groove and the stem, one packing gasket is arranged at the top of the annular packing cavity, and the other packing gasket is arranged at the bottom of the annular packing cavity. Compared with the prior art, the ball valve with the double radial stem bearings has the advantages that the stem can be prevented from radial deflection, jamming and friction with the packing gland, medium leakage of the packing and the packing gaskets can also be prevented, and the like.
Description
Technical field
The present invention relates to a kind of ball valve, especially relate to a kind of ball valve of valve rod biradial bearing.
Background technique
In at present ball valve production and the design, many employing Gland formula valves mainly are comprised of valve body 2, Gland 3, valve rod 4 and filler 1.These Gland formula valves compress filler at the Gland bolt of locking, and Gland endoporus and valve rod external diameter and valve body stuffing hole all leave the gap, valve rod just might rotate and be unlikely locked like this, and the bolt hole on the Gland and bolt are also gapped.And valve rod is large at the gap Yi Over of filler bottom.
The valve of these structures lacks the radial positioning structure of Gland and bottom, and in assembly process, Gland is easy to occur radial deflection, with the valve rod friction, thereby has increased the opening and closing moment of torsion, and also easily leak at the filler place.
Summary of the invention
Purpose of the present invention be exactly provide a kind of in order to overcome the defective that above-mentioned prior art exists and prevent the valve rod radial deflection, killed, with the friction of filler pressure sensitivity, also can prevent the ball valve of valve rod biradial bearing of the dielectric leakage of filler and filler pad.
Purpose of the present invention can be achieved through the following technical solutions: a kind of ball valve of valve rod biradial bearing, this ball valve comprises valve body, Gland, valve rod and filler, described Gland comprises cover plate and Ge Nan, the integral type setting of cover plate dative south, have stuffing-box on the described valve body, this stuffing-box bottom has internal diameter less than the groove of stuffing-box internal diameter, stuffing-box is inserted in described lattice south, cover plate is connected by fastening piece with valve body, the bottom of described valve rod is connected with valve body, groove is passed on the top of valve rod successively, stuffing-box, lattice pass Gland behind the south, described valve rod, stuffing-box, lattice south surrounds a ring packing chamber, described filler is filled in the ring packing chamber, it is characterized in that, described ball valve also comprises the first valve rod radial bearing, the second valve rod radial bearing and filler pad, described the first valve rod radial bearing is enclosed between Ge Nan and the valve rod, described the second valve rod radial bearing is enclosed between groove and the valve rod, described filler pad is provided with two, one is located at the ring packing top of chamber, and another is located at bottom, ring packing chamber.
Described fastening piece is bolt or flange.
Described filler pad is the metallic stuffing pad.
Described the first valve rod radial bearing and the second valve rod radial bearing are made by teflon (PTFE), soluble tetrafluoroethylene (PFA), 50%SS316 stainless steel or wear-resisting lubricated metal.
Described filler is teflon or soluble tetrafluoroethylene or graphite.
Compared with prior art, the present invention has the following advantages:
One, the upper and lower end face of filler is equipped with the filler pad, and when valve body and valve lever clearance were excessive, the filler pad can prevent that filler is owing to squeezing action enters into gap between valve rod and the valve body.
Two, the internal diameter of the step hole of the external diameter of the first valve rod radial bearing and Gland movingly, the internal diameter of the first valve rod radial bearing and valve rod are movingly.Between the first valve rod radial bearing and step hole and the valve rod all for movingly, when preventing the valve rod radial deflection, be unlikely also that valve rod is killed or with the Gland friction.
Three, the outside of the second valve rod radial bearing and valve body are movingly, the inner face of the second valve rod radial bearing and valve rod are movingly, all for movingly, when preventing the valve rod radial deflection, also be unlikely valve rod and killed between the second valve rod radial bearing and valve body and the valve rod.
Four, the first valve rod radial bearing and the second valve rod radial bearing are made by teflon or soluble tetrafluoroethylene.Teflon or soluble tetrafluoroethylene have toughness and the little characteristic of rub resistance coefficient all as the preferred material of valve packing.Application according to valve is different, and the filling material of selecting also can be different.
Five, the stuffing hole Spielpassung of Gland and valve body, monolateral gap is between 0.1～0.15mm.
Six, have the effect that well prevents the valve rod radial deflection, adopt simultaneously the filler pad also can prevent the dielectric leakage of filler and filler pad.
Description of drawings
Fig. 1 is the structural representation of traditional Gland formula valve;
Fig. 2 is structural representation of the present invention.
1 is that filler, 2 is that valve body, 3 is that Gland, 4 is valve rod among Fig. 1;
21 is that the second valve rod radial bearing, 22 is that filler, 23 is that valve body, 24 is that filler pad, 25 is that the first valve rod radial bearing, 26 is that Gland, 27 is that fastening piece, 28 is valve rod among Fig. 2.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 2, a kind of ball valve of valve rod biradial bearing, this ball valve comprise valve body 23, Gland 26, valve rod 28, filler 22, the first valve rod radial bearing 25, the second valve rod radial bearing 21 and filler pad 24.Gland 26 comprises cover plate and Ge Nan, and the integral type setting of cover plate dative south has stuffing-box on the valve body, and this stuffing-box bottom has internal diameter less than the groove of stuffing-box internal diameter.Stuffing-box is inserted in lattice south, and cover plate is connected by fastening piece 27 with valve body 23.The bottom of valve rod 28 is connected with valve body 23, and the top of valve rod 28 passes Gland 26 after passing successively groove, stuffing-box, lattice south, and valve rod 28, stuffing-box, Ge Nan surround a ring packing chamber, and filler 22 is filled in the ring packing chamber.The first valve rod radial bearing 25 is enclosed between Ge Nan and the valve rod 28, and the second valve rod radial bearing 21 is enclosed between groove and the valve rod 28, and filler pad 24 is provided with two, and one is located at the ring packing top of chamber, and another is located at bottom, ring packing chamber.Fastening piece is bolt or flange, and the present embodiment is selected bolt.The filler pad is the metallic stuffing pad.The first valve rod radial bearing is made by teflon (PTFE), soluble tetrafluoroethylene (PFA), 50%SS316 stainless steel or wear-resisting lubricated metal.The second valve rod radial bearing is made by teflon or soluble tetrafluoroethylene.Filler is teflon, soluble tetrafluoroethylene or graphite.
Gland is fixed by fastening piece and valve body, is provided with filler between valve body and the valve rod.Valve rod is provided with the first valve rod radial bearing and the second valve rod radial bearing outward, is provided with the step hole that cooperates with the first valve rod radial bearing in the Gland, is provided with the filler pad between the first valve rod radial bearing and the filler.Fastening piece can also can be other fastening pieces such as flange for bolt.The valve rod hole place of Gland increases a step hole, with thinner flexible and little external diameter cooperates internal diameter to cooperate with valve rod with step hole the first valve rod radial bearing of material (such as 50%SS+PTFE or TFM1600) design of rub resistance coefficient.For preventing that the filler stress deformation from pushing the first valve rod radial bearing, increase respectively a metallic stuffing pad in top and the bottom of filler.
Ball valve increase of the present invention has two valve rod radial bearings, the first valve rod radial bearing is engaged between Gland and the valve rod upper end, the second valve rod radial bearing (double L-shaped 50%SS+PTFE or TFM1600) structural member is engaged between valve rod lower end and the valve body, guarantees that radial deflection does not occur at the up and down two ends of valve rod.
Working principle: ball valve changes and originally directly to compress filler at the gland bolt of locking, and Gland endoporus and valve rod external diameter and valve body stuffing hole all leave the gap, valve rod for be unlikely to locked and valve body between also leave the problems such as gap, between valve rod and Gland, valve rod and valve body, be equipped with the valve rod radial bearing, guarantee like this cooperating between valve rod and Gland, valve body, guaranteed that also radial deflection does not occur valve rod; Increase in addition the metallic stuffing pad, also can prevent the leakage of filler.
Claims (5)
1. the ball valve of a valve rod biradial bearing, this ball valve comprises valve body, Gland, valve rod and filler, described Gland comprises cover plate and Ge Nan, the integral type setting of cover plate dative south, have stuffing-box on the described valve body, this stuffing-box bottom has internal diameter less than the groove of stuffing-box internal diameter, stuffing-box is inserted in described lattice south, cover plate is connected by fastening piece with valve body, the bottom of described valve rod is connected with valve body, groove is passed on the top of valve rod successively, stuffing-box, lattice pass Gland behind the south, described valve rod, stuffing-box, lattice south surrounds a ring packing chamber, and described filler is filled in the ring packing chamber, it is characterized in that, described ball valve also comprises the first valve rod radial bearing, the second valve rod radial bearing and filler pad, described the first valve rod radial bearing is enclosed between Ge Nan and the valve rod, and described the second valve rod radial bearing is enclosed between groove and the valve rod, and described filler pad is provided with two, one is located at the ring packing top of chamber, and another is located at bottom, ring packing chamber.
2. the ball valve of a kind of valve rod biradial bearing according to claim 1 is characterized in that, described fastening piece is bolt or flange.
3. the ball valve of a kind of valve rod biradial bearing according to claim 1 is characterized in that, described filler pad is the metallic stuffing pad.
4. the ball valve of a kind of valve rod biradial bearing according to claim 1, it is characterized in that, described the first valve rod radial bearing and the second valve rod radial bearing are made by teflon (PTFE), soluble tetrafluoroethylene (PFA), 50%SS316 stainless steel+PTFE or wear-resisting lubricated metal.
5. the ball valve of a kind of valve rod biradial bearing according to claim 1 is characterized in that, described filler is teflon, soluble tetrafluoroethylene or graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110243338 CN102954247A (en) | 2011-08-23 | 2011-08-23 | Ball valve with double radial stem bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110243338 CN102954247A (en) | 2011-08-23 | 2011-08-23 | Ball valve with double radial stem bearings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102954247A true CN102954247A (en) | 2013-03-06 |
Family
ID=47763445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110243338 Pending CN102954247A (en) | 2011-08-23 | 2011-08-23 | Ball valve with double radial stem bearings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102954247A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440000A (en) * | 2021-12-24 | 2022-05-06 | 合肥通用机械研究院有限公司 | Composite packing sealing system for ultrahigh-pressure hydrogen energy valve |
-
2011
- 2011-08-23 CN CN 201110243338 patent/CN102954247A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440000A (en) * | 2021-12-24 | 2022-05-06 | 合肥通用机械研究院有限公司 | Composite packing sealing system for ultrahigh-pressure hydrogen energy valve |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130306 |