CN204477357U - Smithwelding is from pressure-relief type gate valve - Google Patents
Smithwelding is from pressure-relief type gate valve Download PDFInfo
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- CN204477357U CN204477357U CN201520017599.XU CN201520017599U CN204477357U CN 204477357 U CN204477357 U CN 204477357U CN 201520017599 U CN201520017599 U CN 201520017599U CN 204477357 U CN204477357 U CN 204477357U
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Abstract
The utility model relates to a kind of smithwelding from pressure-relief type gate valve, comprise valve body, valve seat and support, described valve body is formed by upper valve body and lower valve body smithwelding, two valve seats in left and right are welded on valve body, left flap, determine block and right flap and be arranged on to be connected in valve seat and with valve rod valve body is divided into lumen, snout cavity and outlet plenum, lumen adopts positive toroidal, and the bottom of lumen adopts hemisphere end socket pattern; Described valve seat having the relief hole for being communicated with snout cavity and lumen, valve body being provided with the balance tube for being communicated with snout cavity and lumen, valve body is provided with the safety relief valve be connected with lumen.The effect that the utility model is useful is: this valve body adopts upper and lower valve body to weld, and upper and lower valve body all adopts forging to form, and weld seam is through 100% non-destructive inspection inspection, lumen adopts positive toroidal, bottom adopts hemisphere end socket pattern, makes valve body stress equalization, improves body strength further.
Description
Technical field
The utility model relates to valve field, and especially a kind of smithwelding is from pressure-relief type gate valve.
Background technique
Valve is the fluid control elements with movable agency of control media flowing.Gate valve is because fluid resistance is little, steering force is little and seal the feature such as reliable and be widely used in the fields such as oil, chemical industry, power station, long-distance transport pipes, shipbuilding, nuclear industry, aerospace and offshore oil production.Traditional gate valves, owing to there is the drawback of lumen cavitation, abnormal situation of boosting, can not be used for high temperature, high pressure operating mode.We devise Forging weldering from pressure-relief type gate valve to meet the needs of high temperature, high pressure operating mode.
Traditional gate valves Problems existing and formation mechenism: several kinds such as Single disc, double-flashboard, wedge-type, parallel type can be divided into according to basic structure gate valve, wherein wedge-type double-flashboard and flexible wedge gate most widely used, these two kinds of gate valves in use all have good sealing effect, but its excellent sealing structure affects also to gate valve safety and reliability and bringing working life significantly.In many industrial systems, the application of gate valve is all similar, and namely system media after powering, and by cold conditions heating state, flashboard cuts out in cold conditions, opens time hot.When gate valve is closed, high-pressure liquid is plugged in lumen by flashboard turn-off transient and cannot outflows, and is formed liquid residual.During system boot, the high-temperature, high pressure fluid of gate valve upstream, to lumen dielectric heating, makes the instantaneous intensification of lumen medium, according to Bernoulli's equation, the pressure increased is usually geometrical progression, far above upstream pressure, form an abnormal press area at lumen, pressure part bearing capacity is cut down greatly, the applied stress of valve rod and flashboard frame sharply increases, the driving of driving mechanism is unable to do what one wishes, even cannot start, and breaks valve rod, flashboard frame ruptures, motor burns out time serious.
Along with lumen hydrodynamic pressure raises, also can there is serious cavitation phenomenons in valve body lumen.Because the shape of valve body lumen and liquid stream such as to be swerved wherein at the flow feature, determine the uneven of lumen pressure distribution, valve body also exists some local depression district near valve seat direction.When the fluid of lumen is by snout cavity dielectric heating, when the fluid temperature (F.T.) of low pressure area is elevated to the vapourizing temperature under relevant pressure, fluid just starts vaporization, forms small bubble; Bubble coagulates instantaneously again when flowing to pressure higher position with fluid and loses, and crumbles and fall.Coagulate the moment of mistake at bubble, the liquid around bubble pours rapidly the hole that bubble coagulates mistake, and with high temperature, high pressure water hammer locally.Water attack is the feature of cavitation phenomenons, and the experimental research according to foreign scholar is reported, and the frequency once recording water attack during cavitation has 25000 times each second, and local compression is up to 30MPa (pressure measurement area 1.5mm
2).Because water attack is knocked repeatedly, valve body is caused to be subject to fatigue ruption.And under the effect of continuous print pressure wave, liquid can infiltrate and flow out the hole of metal, make metal particle depart from parent and be taken away by liquid, there is depression one by one in metal surface, produces serious spot corrosion.Valve interior surface is under the effect of so periodic active force, and surface can be cellular or spongy destruction.
These phenomenons are of common occurrence in many High Temperature High Pressure gate valves; have a strong impact on the security of operation of valve; even produce personal safety accident; cause serious stopping accident; if do not take measures to gate valve and even system; the abnormal boosting of lumen, supercharging cavitation are almost unavoidable to the destruction of system, thus start with from design proposal, and fundamentally in balance, cavity pressure, the abnormal boosting of elimination lumen are very necessary and urgent.
Summary of the invention
The utility model will solve the shortcoming of above-mentioned prior art, provides a kind of smithwelding from pressure-relief type gate valve.
The utility model solves the technological scheme that its technical problem adopts: this smithwelding is from pressure-relief type gate valve, comprise valve body, valve seat and support, described valve body is formed by upper valve body and lower valve body smithwelding, two valve seats in left and right are welded on valve body, left flap, determine block and right flap and be arranged on to be connected in valve seat and with valve rod valve body is divided into lumen, snout cavity and outlet plenum, lumen adopts positive toroidal, and the bottom of lumen adopts hemisphere end socket pattern; Described valve seat having the relief hole for being communicated with snout cavity and lumen, valve body being provided with the balance tube for being communicated with snout cavity and lumen, valve body is provided with the safety relief valve be connected with lumen; Be provided with the valve gap be sleeved on valve rod in the upper-end surface of valve body, valve gap is provided with self-tightening sealing ring, cushion block, pendant collet and gasket ring successively, be fixedly connected with by snap ring, screw bolt and nut between support with valve body and pass through finger setting.
Described valve gap is set with and pins down dish, pin down dish be fixedly connected with the Gland be sleeved on valve rod and be fixedly connected on support by screw, pin down between dish and valve gap and be provided with divided ring, be provided with Packing seat and filler between valve gap and valve rod, filler to be arranged on Packing seat and to be fixed by Gland compacting.
The effect that the utility model is useful is:
(1) this valve body adopts upper and lower valve body to weld, and upper and lower valve body all adopts forging to form, and weld seam is through 100% non-destructive inspection inspection, and lumen adopts positive toroidal, and bottom adopts hemisphere end socket pattern, makes valve body stress equalization, improves body strength further.Pore, the trachoma avoiding traditional gate valves valve body to adopt cast-internal problems, many casting defect problems such as loose, have voltage endurance capability by force, the features such as reliability high long service life;
(2) this valve is designed to lumen from pressure relief, prevents the generation of abnormal boosting and cavitation phenomenons, is applicable to the above operating mode of High Temperature High Pressure.
(3) connection of valve body and support adopts Snap ring structure, and assembly and disassembly is convenient.
(4) valve bonnet seal adopts pressure self-tightening sealing configuration, and pressure more high leak tightness is better.
(5) valve seat, valve clack sealing surface adopt cobalt base hard alloy plasma spray to form, wear-resisting, antifraying property good.
(6) stem surface is through corrosion stability nitriding treatment, has good corrosion stability and resistance to marring.
(7) opening and closing of valve can adopt Electronic control, pneumatic control and control of surging.There is the feature such as local operation, telecontrol.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the utility model.
Description of reference numerals: valve body 1, valve seat 2, left flap 3, determine block 4, right flap 5, valve rod 6, self-tightening sealing ring 7, cushion block 8, pendant collet 9, gasket ring 10, bolt 11, nut 12, snap ring 13, pin 14, pin down dish 15, safety relief valve 16, lumen 17, relief hole 18, balance tube 19, snout cavity 20, support 21, outlet plenum 22, valve gap 23, Packing seat 24, screw 25, Gland 26, divided ring 27, filler 28.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, this smithwelding is from pressure-relief type gate valve, comprise valve body 1, valve seat 2 and support 21, described valve body 1 is formed by upper valve body and lower valve body smithwelding, two valve seats 2 in left and right are welded on valve body 1, and weld seam, through 100% non-destructive inspection inspection, left flap 3, is determined block 4 and right flap 5 and is arranged on to be connected in valve seat 2 and with valve rod 6 valve body 1 is divided into lumen 17, snout cavity 20 and outlet plenum 22, lumen 17 adopts positive toroidal, and the bottom of lumen 17 adopts hemisphere end socket pattern; Make valve body stress equalization, improve body strength further.Pore, the trachoma avoiding traditional gate valves valve body to adopt cast-internal problems, many casting defect problems such as loose, have voltage endurance capability by force, the features such as reliability high long service life.Described valve seat 2 having the relief hole 18 for being communicated with snout cavity 20 and lumen 17, valve body 1 being provided with the balance tube 19 for being communicated with snout cavity 20 and lumen 17, valve body 1 is provided with the safety relief valve 16 be connected with lumen 17; The valve gap 23 be sleeved on valve rod 6 is provided with in the upper-end surface of valve body 1, valve gap 23 is provided with successively self-tightening sealing ring 7, cushion block 8, pendant collet 9 and gasket ring 10, is fixedly connected with by snap ring 13, bolt 11 and nut 12 between support 21 with valve body 1 and is located by pin 14.Described valve gap 23 is set with and pins down dish 15, pin down dish 15 be fixedly connected with the Gland 26 be sleeved on valve rod 6 and be fixedly connected with on the stent 21 by screw 25, pin down between dish 15 and valve gap 23 and be provided with divided ring 27, be provided with Packing seat 24 and filler 28 between valve gap 23 and valve rod 6, filler 28 to be arranged on Packing seat 24 and to be fixed by Gland 26 compacting.
This valve is designed to lumen from pressure relief, described valve seat 2 has the relief hole 18 for being communicated with snout cavity 20 and lumen 17, valve body 1 is provided with the balance tube 19 for being communicated with snout cavity 20 and lumen 17, valve body 1 is provided with the safety relief valve 16 be connected with lumen 17; Triple guarantee, prevents the generation of abnormal boosting and cavitation phenomenons, is applicable to the above operating mode of High Temperature High Pressure.
Valve bonnet seal adopts the pressure self-tightening sealing configuration of self-tightening sealing ring 7, and pressure more high leak tightness is better.Valve seat, valve clack sealing surface adopt cobalt base hard alloy plasma spray to form, wear-resisting, antifraying property good.Stem surface, through corrosion stability nitriding treatment, has good corrosion stability and resistance to marring.The opening and closing of valve can adopt Electronic control, pneumatic control and control of surging.There is the feature such as local operation, telecontrol.
In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (2)
1. a smithwelding is from pressure-relief type gate valve, comprise valve body (1), valve seat (2) and support (21), it is characterized in that: described valve body (1) is formed by upper valve body and lower valve body smithwelding, two valve seats (2) in left and right are welded on valve body (1), left flap (3), determine block (4) and right flap (5) to be arranged on to be connected in valve seat (2) and with valve rod (6) valve body (1) is divided into lumen (17), snout cavity (20) and outlet plenum (22), lumen (17) adopts positive toroidal, the bottom of lumen (17) adopts hemisphere end socket pattern, described valve seat (2) has the relief hole (18) for being communicated with snout cavity (20) and lumen (17), valve body (1) is provided with the balance tube (19) for being communicated with snout cavity (20) and lumen (17), valve body (1) is provided with the safety relief valve (16) be connected with lumen (17), the valve gap (23) be sleeved on valve rod (6) is provided with in the upper-end surface of valve body (1), valve gap (23) is provided with successively self-tightening sealing ring (7), cushion block (8), pendant collet (9) and gasket ring (10), is fixedly connected with nut (12) by snap ring (13), bolt (11) and is located by pin (14) between support (21) with valve body (1).
2. smithwelding according to claim 1 is from pressure-relief type gate valve, it is characterized in that: described valve gap (23) is set with and pins down dish (15), pin down dish (15) be fixedly connected with the Gland (26) be sleeved on valve rod (6) and be fixedly connected on support (21) by screw (25), pin down between dish (15) and valve gap (23) and be provided with divided ring (27), Packing seat (24) and filler (28) is provided with between valve gap (23) and valve rod (6), filler (28) is arranged on Packing seat (24) and goes up and fixed by Gland (26) compacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520017599.XU CN204477357U (en) | 2015-01-09 | 2015-01-09 | Smithwelding is from pressure-relief type gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520017599.XU CN204477357U (en) | 2015-01-09 | 2015-01-09 | Smithwelding is from pressure-relief type gate valve |
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| CN204477357U true CN204477357U (en) | 2015-07-15 |
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| CN201520017599.XU Active CN204477357U (en) | 2015-01-09 | 2015-01-09 | Smithwelding is from pressure-relief type gate valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090278A (en) * | 2016-08-22 | 2016-11-09 | 慎江阀门有限公司 | A kind of High Temperature High Pressure double-pin type double-flashboard gate valve |
| CN107724996A (en) * | 2017-09-22 | 2018-02-23 | 中国海洋石油总公司 | Natural gas wellhead block valve |
| CN111677895A (en) * | 2020-06-18 | 2020-09-18 | 南通国电阀门科技有限公司 | Multi-bypass pressure relief type gate valve of high-pressure forge welding structure for nuclear power |
-
2015
- 2015-01-09 CN CN201520017599.XU patent/CN204477357U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090278A (en) * | 2016-08-22 | 2016-11-09 | 慎江阀门有限公司 | A kind of High Temperature High Pressure double-pin type double-flashboard gate valve |
| CN107724996A (en) * | 2017-09-22 | 2018-02-23 | 中国海洋石油总公司 | Natural gas wellhead block valve |
| CN111677895A (en) * | 2020-06-18 | 2020-09-18 | 南通国电阀门科技有限公司 | Multi-bypass pressure relief type gate valve of high-pressure forge welding structure for nuclear power |
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