CN104373615A - Gate valve high in sealing performance and operating method thereof - Google Patents
Gate valve high in sealing performance and operating method thereof Download PDFInfo
- Publication number
- CN104373615A CN104373615A CN201410567972.9A CN201410567972A CN104373615A CN 104373615 A CN104373615 A CN 104373615A CN 201410567972 A CN201410567972 A CN 201410567972A CN 104373615 A CN104373615 A CN 104373615A
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- Prior art keywords
- valve
- flange
- gate valve
- leak tightness
- high leak
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/12—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with wedge-shaped arrangements of sealing faces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Sliding Valves (AREA)
Abstract
The invention discloses a gate valve high in sealing performance. The gate valve high in sealing performance comprises a valve body, a valve seat, a valve rod, a gasket, a valve deck, a pressing sleeve, a pressing plate, a locking nut and a hand wheel, wherein a valve nut is arranged below the hand wheel, a pressing nut is installed outside the valve nut, an oil nozzle is arranged outside the pressing nut, packing is arranged in the pressing sleeve and is divided into an upper section and a lower section by a partition ring, a sealing base is arranged at the position where the lower end of the pressing sleeve is connected with the valve deck, a rivet is arranged outside a flange at the upper end of the valve body, a flashboard is arranged below the valve rod in the valve body, and the flashboard and the valve seat are fixed together through welding. The invention further discloses an operating method of the gate valve high in sealing performance. According to the gate valve high in sealing performance and the operating method of the gate valve high in sealing performance, a medium channel in the valve body is straight through, a medium flows linearly, flowing resistance is low, the moving direction of the flashboard is perpendicular to the flowing direction of the medium all the time, a water hammer is unlikely to appear, the structure is simple, sealing is reliable, operation is easy and flexible, and the application range is wide.
Description
Technical field
The invention belongs to technical field of valve manufacturing, relate to a kind of high leak tightness gate valve and operating method thereof.
Background technique
Valve is controlling component in pipeline fluid transporting system, and it is used to change path section and media flow direction, has the functions such as water conservancy diversion, cut-off, throttling, non-return, shunting or overflow release.In the technical support that valve is produced and researched and developed, state's inner valve falls behind unlike external valve, and products a lot of on the contrary can compare favourably with international business in technology and innovation, and the development of domestic valve industry moves ahead toward the direction of high-end modern.
Along with the development of valve gate technology, constantly widening of valve applications field, valve standard corresponding is with it also more and more indispensable; In the period of valve industry product introduction one innovation, not only product category needs to update, and enterprise internal management also needs to deepen reforms according to the standard of industry; Therefore, need, while fully using existing standard, to look forward to the future, work out and can apply to new standard in the future and new system, thus the development that propulsion valve technology is higher level.
Wherein, the open-shut device of gate valve is flashboard, moving direction and the flow direction of flashboard are perpendicular, and gate valve can only make standard-sized sheet and complete shut-down, and the general gate valve ubiquity for a long time market used phenomenon of leaking or get rusty, and easily cause erosion and scratch between sealing surface, keep in repair more difficult, boundary dimension is comparatively large, opens and needs certain space, opening/closing time is long, and structure is more complicated.
Summary of the invention
Technical problem to be solved by this invention is, overcome the shortcoming of prior art, provide a kind of high leak tightness gate valve and operating method thereof, valve inner medium channel is straight-through, medium is in line flowing, flow resistance is little, and ram movement direction is all perpendicular with media flow direction, not easily produces water hammer, body is simple, sealing is reliable, operation light and flexible, applied widely.
In order to solve above technical problem, the invention provides a kind of high leak tightness gate valve, comprise valve body, valve seat, valve rod, pad, valve gap, gland, pressing plate, locknut and handwheel, valve seat is provided with in valve body, valve seat installs valve rod, and the upper end portion of valve body is fixedly connected with middle flange bolt by middle flange nut with valve gap, valve body and valve cover chamber are provided with pad, be positioned at valve rod outer side wall inside valve gap and be provided with gland, valve gap upper end is provided with articulated pin, gland is provided with pressing plate, pressing plate and valve gap upper end portion adopt swing bolt and movable joint nut to be connected and fixed, by adopting locknut, handwheel is fixed on valve stem tip, valve mother is provided with below handwheel, pressure is installed female outside valve mother, the female outside of pressure is provided with oil nozzle, filler is provided with in gland, filler adopts spacer ring to be divided into two sections, gland lower end and valve gap joint are provided with sealing seat, rivet is provided with outside valve body upper flanges, the below of valve body inner valve stem is provided with flashboard, together with flashboard is welded and fixed with valve seat,
Valve body both sides are imported and exported and are respectively equipped with flange, and the flange of both sides is respectively large convex flange and large female flange, and large convex flange is corresponding with large female flange, the convex neck height d1 of large convex flange is 7mm, there is car waterline end, and the recessed throat depth degree d2 of large female flange is 5mm, and end is without car waterline.
Two side flanges of product valve body of the present invention, the convex neck height d1 of large convex flange is 7mm, there is car waterline end, the recessed throat depth degree d2 of large female flange is 5mm, end is without car waterline, when carrying out Flange joint with pipeline, convex neck height is slightly larger than recessed throat depth degree, a middle hard gasket can be installed inside the convex neck of large convex flange, then be connected with the recessed neck of pipeline, the recessed neck of large female flange is connected with the convex neck of pipeline, and installs a middle hard gasket inside the convex neck of pipeline, the bearing capacity of connection part can be improved, improve connection sealing and steadiness.
The technological scheme that the present invention limits further is:
Aforementioned pad is annular rubber tissue or copper sheet structure; Filler is teflon or braiding asbestos; Rubber seal is equipped with in sealing seat.
Further,
Present invention also offers a kind of operating method of high leak tightness gate valve, comprise following concrete steps:
A. high leak tightness gate valve level be placed in and keep fire away and shady and cool place, its feed liquor accent is connected fluid pipeline respectively with fluid accent, checks that all pipelines ensure sealing, and installs its upstream additional at least one filter;
B. by high leak tightness gate valve feed liquor accent and fluid accent place setting pressure table and U-gauge respectively, and check pressure gauge and U-gauge whether intact and ensure that its range is accurate;
C. high leak tightness gate valve and outlet valve is opened, as required regulates liquid force value, wherein:
When needing to cut off feed flow, first cut off liquid supply valve, then close the front and back valve of high leak tightness gate valve, then rotate handwheel and tighten;
When needing to recover feed flow, first rotate handwheel and unscrew, the outlet valve of high leak tightness gate valve cuts out, more slowly opens outlet valve, can feed flow be recovered.
The invention has the beneficial effects as follows:
The present invention selects teflon or braiding asbestos to use as filler, wherein, teflon has fabulous chemical inertness and excellent lubricity, can overall suppress, also shape (V-ring) can be made by car, also can as the oiling agent of asbestos packing, overall V-ring will add spring force makes it have minimum pretightening force to valve rod; And braiding asbestos can be made and be separated circle, it can surround valve rod, maintenance is convenient to after valve installation, and the highest temperature extremes of asbestos is close to 10000F, adopts the bonnet of heat radiation can significantly reduce filler temperature, make it still can use higher than during 10000F in fluid temperature (F.T.).
Valve inner medium channel is straight-through, and medium is in line flowing, and flow resistance is little, and ram movement direction is all perpendicular with media flow direction, not easily produces water hammer, and body is simple, and sealing is reliable, operation light and flexible, applied widely.
Accompanying drawing explanation
Fig. 1 is sectional view of the present invention;
Wherein, 1-valve body, 2-valve seat, 3-flashboard, 4-valve rod, 5-pad, 6-valve gap, 7-sealing seat, 8-filler, 9-spacer ring, 10-filler, 11-gland, 12-pressing plate, 13-valve is female, and 14-presses mother, 15-locknut, 16-handwheel, 17-oil nozzle, 18-swing bolt, 19-movable joint nut, 20-articulated pin, flange nut in 21-, flange bolt in 22-, 23-rivet.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
The present embodiment provides a kind of high leak tightness gate valve, structure as shown in Figure 1, comprise valve body 1, valve seat 2, valve rod 4, pad 5, valve gap 6, gland 11, pressing plate 12, locknut 15 and handwheel 16, valve seat 2 is provided with in valve body 1, valve seat 2 is installed valve rod 4, and the upper end portion of valve body 1 is fixedly connected with middle flange bolt 22 by middle flange nut 21 with valve gap 6, pad 5 is provided with between valve body 1 and valve gap 6, be positioned at valve rod 4 outer side wall inside valve gap 6 and be provided with gland 11, valve gap 6 upper end is provided with articulated pin 20, gland 11 is provided with pressing plate 12, pressing plate 12 and valve gap 6 upper end portion adopt swing bolt 18 and movable joint nut 19 to be connected and fixed, by adopting locknut 15, handwheel 16 is fixed on valve rod 4 top, valve mother 13 is provided with below handwheel 16, pressure female 14 is installed outside valve mother 13, oil nozzle 17 is provided with outside pressure female 14, filler is provided with in gland 11, filler adopts spacer ring 9 to be divided into two sections, gland 11 lower end and valve gap 6 joint are provided with sealing seat 7, rivet 23 is provided with outside valve body 1 upper flanges, the below of valve body 1 inner valve stem 4 is provided with flashboard 3, together with flashboard 3 is welded and fixed with valve seat 2, valve body 1 both sides are imported and exported and are respectively equipped with flange, the flange of both sides is respectively large convex flange and large female flange, large convex flange is corresponding with large female flange, described valve body (1) both sides are imported and exported and are respectively equipped with flange, and the flange of described both sides is respectively large convex flange and large female flange, and described large convex flange is corresponding with large female flange, the convex neck height d1 of described large convex flange is 7mm, there is car waterline end, and the recessed throat depth degree d2 of described large female flange is 5mm, and end is without car waterline.
Aforementioned pad 5 is annular rubber tissue structure, and filler is teflon; Rubber seal is equipped with in sealing seat 7.
The present embodiment also provides a kind of operating method of high leak tightness gate valve, comprises following concrete steps:
A. high leak tightness gate valve level be placed in and keep fire away and shady and cool place, its feed liquor accent is connected fluid pipeline respectively with fluid accent, checks that all pipelines ensure sealing, and installs its upstream additional at least one filter;
B. by high leak tightness gate valve feed liquor accent and fluid accent place setting pressure table and U-gauge respectively, and check pressure gauge and U-gauge whether intact and ensure that its range is accurate;
C. high leak tightness gate valve and outlet valve is opened, as required regulates liquid force value, wherein:
When needing to cut off feed flow, first cut off liquid supply valve, then close the front and back valve of high leak tightness gate valve, then rotate handwheel and tighten;
When needing to recover feed flow, first rotate handwheel and unscrew, the outlet valve of high leak tightness gate valve cuts out, more slowly opens outlet valve, can feed flow be recovered.
The present embodiment product due in opening and closing process between sealing surface frictional force little, more durable, Lift is little, easy to manufacture, easy to maintenance, is not only applicable to mesolow, and is applicable to high pressure; This product relies on valve thick stick pressure, and valve clack sealing surface and sealing surface of seat are fitted tightly, and stops medium circulation.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technological scheme basis is done, all falls within scope.
Claims (5)
1. a high leak tightness gate valve, comprise valve body (1), valve seat (2), valve rod (4), pad (5), valve gap (6), gland (11), pressing plate (12), locknut (15) and handwheel (16), valve seat (2) is provided with in described valve body (1), described valve seat (2) is installed valve rod (4), and the upper end portion of described valve body (1) is fixedly connected with middle flange bolt (22) by middle flange nut (21) with valve gap (6), pad (5) is provided with between described valve body (1) and valve gap (6), described valve gap (6) inner side is positioned at described valve rod (4) outer side wall and is provided with gland (11), described valve gap (6) upper end is provided with articulated pin (20), described gland (11) is provided with pressing plate (12), described pressing plate (12) and described valve gap (6) upper end portion adopt swing bolt (18) and movable joint nut (19) to be connected and fixed, by adopting locknut (15), handwheel (16) is fixed on described valve rod (4) top, it is characterized in that, described handwheel (16) below is provided with valve mother (13), pressure female (14) is installed in described valve mother (13) outside, described pressure female (14) outside is provided with oil nozzle (17), described gland is provided with filler in (11), described filler adopts spacer ring (9) to be divided into two sections, described gland (11) lower end and valve gap (6) joint are provided with sealing seat (7), rivet (23) is provided with outside described valve body (1) upper flanges, the below of described valve body (1) inner valve stem (4) is provided with flashboard (3), together with described flashboard (3) is welded and fixed with described valve seat (2),
Described valve body (1) both sides are imported and exported and are respectively equipped with flange, the flange of described both sides is respectively large convex flange and large female flange, described large convex flange is corresponding with large female flange, the convex neck height d1 of described large convex flange is 7mm, there is car waterline end, the recessed throat depth degree d2 of described large female flange is 5mm, and end is without car waterline.
2. high leak tightness gate valve according to claim 1, is characterized in that, described pad (5) is annular rubber tissue or copper sheet structure.
3. high leak tightness gate valve according to claim 1, is characterized in that, described filler is teflon or braiding asbestos.
4. high leak tightness gate valve according to claim 1, is characterized in that, described sealing seat is equipped with rubber seal in (7).
5. an operating method for high leak tightness gate valve, is characterized in that, comprises following concrete steps:
A. high leak tightness gate valve level be placed in and keep fire away and shady and cool place, its feed liquor accent is connected fluid pipeline respectively with fluid accent, checks that all pipelines ensure sealing, and installs its upstream additional at least one filter;
B. by high leak tightness gate valve feed liquor accent and fluid accent place setting pressure table and U-gauge respectively, and check pressure gauge and U-gauge whether intact and ensure that its range is accurate;
C. high leak tightness gate valve and outlet valve is opened, as required regulates liquid force value, wherein:
When needing to cut off feed flow, first cut off liquid supply valve, then close the front and back valve of high leak tightness gate valve, then rotate handwheel and tighten;
When needing to recover feed flow, first rotate handwheel and unscrew, the outlet valve of high leak tightness gate valve cuts out, more slowly opens outlet valve, can feed flow be recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410567972.9A CN104373615B (en) | 2014-10-22 | A kind of high leakproofness gate valve and operational approach thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410567972.9A CN104373615B (en) | 2014-10-22 | A kind of high leakproofness gate valve and operational approach thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104373615A true CN104373615A (en) | 2015-02-25 |
| CN104373615B CN104373615B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687535A (en) * | 2016-11-10 | 2018-02-13 | 林之铠 | A kind of gate valve for having hydraulic pressure indicator function |
| CN109973665A (en) * | 2019-03-15 | 2019-07-05 | 汉工阀门股份有限公司 | A kind of blowdown drain valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6247679B1 (en) * | 1998-03-02 | 2001-06-19 | T&S Solutions, Inc. | Valve stem and method of manufacture; improved stem packing |
| CN202215768U (en) * | 2011-09-01 | 2012-05-09 | 江苏苏高流体机械有限公司 | Wedge gate valve |
| CN202349239U (en) * | 2011-11-17 | 2012-07-25 | 盐城思达德民力阀门有限公司 | Gate valve |
| CN203131074U (en) * | 2013-02-22 | 2013-08-14 | 江苏天泰电站阀门有限公司 | Wedge gate valve |
| CN203131075U (en) * | 2013-02-22 | 2013-08-14 | 江苏天泰电站阀门有限公司 | Double-sealing wedge gate valve with reinforcing gate plate |
| CN204226696U (en) * | 2014-10-22 | 2015-03-25 | 盐城奥克阀门有限公司 | A kind of high leak tightness gate valve |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6247679B1 (en) * | 1998-03-02 | 2001-06-19 | T&S Solutions, Inc. | Valve stem and method of manufacture; improved stem packing |
| CN202215768U (en) * | 2011-09-01 | 2012-05-09 | 江苏苏高流体机械有限公司 | Wedge gate valve |
| CN202349239U (en) * | 2011-11-17 | 2012-07-25 | 盐城思达德民力阀门有限公司 | Gate valve |
| CN203131074U (en) * | 2013-02-22 | 2013-08-14 | 江苏天泰电站阀门有限公司 | Wedge gate valve |
| CN203131075U (en) * | 2013-02-22 | 2013-08-14 | 江苏天泰电站阀门有限公司 | Double-sealing wedge gate valve with reinforcing gate plate |
| CN204226696U (en) * | 2014-10-22 | 2015-03-25 | 盐城奥克阀门有限公司 | A kind of high leak tightness gate valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687535A (en) * | 2016-11-10 | 2018-02-13 | 林之铠 | A kind of gate valve for having hydraulic pressure indicator function |
| CN109973665A (en) * | 2019-03-15 | 2019-07-05 | 汉工阀门股份有限公司 | A kind of blowdown drain valve |
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