CN102494150A - Gate valve with novel sealing structure - Google Patents
Gate valve with novel sealing structure Download PDFInfo
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- CN102494150A CN102494150A CN2011104030286A CN201110403028A CN102494150A CN 102494150 A CN102494150 A CN 102494150A CN 2011104030286 A CN2011104030286 A CN 2011104030286A CN 201110403028 A CN201110403028 A CN 201110403028A CN 102494150 A CN102494150 A CN 102494150A
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Abstract
The invention relates to a gate valve with a novel sealing structure. The gate valve comprises a valve body, a valve rod, a valve plate and a handle, wherein a valve cavity with an inlet and an outlet is arranged in the valve body; the valve cavity comprises a bottom sealing cavity body and a sliding cavity body for the valve plate to slide; sealed bosses which are matched with each other are arranged among the axial side surface of the valve plate, the inlet of the valve cavity and the outlet of the valve cavity; the lower part of the radial side surface of the valve plate is set into a shape matched with the bottom of the sealing cavity body of the valve cavity; when the valve plate blocks the inlet of the valve cavity and the outlet of the valve cavity, the lower surface of the sealed boss of the valve plate exactly presses the upper surface of the sealed bosses of the inlet of the valve cavity and the outlet of the valve cavity; and meanwhile, the lower part of the radial side surface of the valve plate tightly presses the bottom of the sealing cavity body of the valve cavity. Since the sealed bosses which are matched with each other are arranged among the axial side surface of the valve plate, the inlet of the valve cavity and the outlet of the valve cavity, the sealing reliability is improved, the sealing surface of the valve plate is prevented from generating frictional force, and the service life of the valve plate of the gate valve is greatly prolonged.
Description
[technical field]
The present invention relates to a kind of gate valve, more particularly, relate to longer, the sealing of a kind of life-span more reliably with the gate valve of novel sealing structure.
[background technique]
Existing pipeline valve generally includes three kinds: butterfly valve, ball valve and gate valve.Wherein the pipeline flow resistance of butterfly valve is little, and 90 ° of switches, operation are rapidly, but can only be applied in normal pressure or the low-pressure line, and the sealing surface easy abrasion; Littler and the same 90 ° of switches of the pipeline flow resistance of ball valve, operation rapidly, though can high pressure resistant its manufacture cost high, and have the problem of sealing surface easy abrasion equally; Gate valve can be applied in the high pressure line, and low cost of manufacture, but also has the problem of sealing surface wear.In actual application, when taking all factors into consideration cost and application area, gate valve has certain advantage, so gate valve application quantity in three types of pipeline valves is maximum.
Gate valve generally includes valve body, valve plate, valve rod and handle, wherein is provided with valve pocket in the valve body, and valve body is provided with inlet tube and the outer pipe that is communicated with valve pocket, and inlet tube is the import of valve pocket with the place of connection of valve pocket, and outer pipe is the outlet of valve pocket with the place of connection of valve pocket; Valve plate can slide up and down and can seal up the import and the outlet of valve pocket in valve pocket, thereby intercepts inlet tube and outer pipe; The tapped hole that is provided with on valve rod and the valve body is threaded and an end is rotationally connected with valve plate in the valve pocket and the other end is fixedly connected with handle above the valve body.When rotating handwheel, thereby valve rod produces with respect to the valve body rotation, and then drives the valve plate up-down in the valve pocket, and then opens or closes the import of valve pocket and the connection between the outlet, realizes the switch of valve.
In order to guarantee that valve plate can reliable sealing import and outlet, at the sealing surface place of valve plate and body cavity outlet/inlet seal ring (metal) is set usually in the existing gate valve, reaches the effect of better sealing; And the sealing surface between valve plate and body cavity are imported and exported usually is set to the conical surface, makes when valve plate from top to bottom inserts the valve pocket bottom, and valve plate is pressed on the seal ring, forms sealing firmly.In addition, the also direct valve plate cover of a sheathed rubber on valve plate, through the valve plate that casts out is placed in the rubber pattern, encapsulate forms on the encapsulate machine usually, forms soft seal.But, when valve plate when the valve pocket import and export slides up and down, because function of friction makes the displacement difference to some extent of rubber valve sleeve-board each several part; Especially near the displacement of valve plate one side with to import and export the displacement difference of a side near valve pocket bigger; This makes rubber valve sleeve-board inside have shearing force, makes the rubber valve sleeve-board be easy to torn and damages, and shortens working life; And then cause seal failure, form and leak.For the valve plate of hard sealing, the frictional force at sealing surface place causes sealing surface to wear and tear fast easily and lost efficacy, and forms and leaks.
[summary of the invention]
The technical problem underlying that the present invention will solve is, has life-span defective short, that lost efficacy easily to the sealing configuration of gate valve in the existing technology, and a kind of gate valve of novel sealing structure is provided, and there is not friction in its sealing part, and the life-span is longer, sealing is more reliable.
The technical solution adopted for the present invention to solve the technical problems is: the gate valve of constructing a kind of novel sealing structure; Comprise valve body, valve rod, valve plate and handle; Be provided with the valve pocket of bringing mouth and outlet in the valve body, said valve pocket comprises the seal chamber of bottom and the slip cavity that the said valve plate of confession slides; Be provided with the seal boss that cooperatively interacts between the axial sides of said valve plate and the import and export of valve pocket, the bottom of said valve plate radial side is set to the shape that matches with the bottom of said valve pocket Seal cage; When said valve plate intercepted the valve pocket import and export, the lower surface of said valve plate seal boss just in time was pressed on the upper surface that said valve pocket is imported and exported seal boss, and the bottom of valve plate radial side is pressed on the bottom of valve pocket seal chamber simultaneously.
In gate valve of the present invention, said seal boss is set to arc, and the length of said valve plate seal boss is imported and exported the length of seal boss greater than said valve pocket; The two ends of said valve plate boss extend to the valve plate axial sides.
In gate valve of the present invention, said seal boss preferably is set to circular arc, and its radian is less than π.
In gate valve of the present invention, the internal diameter that said valve pocket is imported and exported seal boss equates with the internal diameter that said valve pocket is imported and exported.
In import and export of the present invention; The bottom of said valve plate radial side comprises intermediate section and the changeover portion that is positioned at the intermediate section both sides; Its changeover portion is set to downward-sloping, makes intermediate section perpendicular to the projected length of the projected length on the horizontal plane of valve rod less than the bottom of valve plate radial side.
In gate valve of the present invention, the lower surface of said valve plate seal boss comprises with said valve pocket imports and exports seal boss seal section that cooperates and the changeover portion that is positioned at the seal section two ends; The two ends of said valve plate seal boss extend to the basifacial changeover portion of said valve plate radial side; Make the upper surface of valve plate seal boss be connected, and the changeover portion of valve plate seal boss lower surface extend to the middle part of basifacial intermediate section of said valve plate radial side or changeover portion with the basifacial changeover portion of said valve plate radial side.
In gate valve of the present invention, the basifacial intermediate section of said valve plate radial side is set to arc shaped surface and changeover portion is set to the inclined-plane.
In gate valve of the present invention, be provided with slide rail and the chute that cooperatively interacts between the slip cavity radial side of said valve pocket and the said valve plate radial side.
In gate valve of the present invention, the end face that said valve pocket is imported and exported seal boss matches with said valve plate axial sides, makes valve plate between the end face of valve pocket import and export seal boss, slide up and down.
The gate valve of embodiment of the present invention has following beneficial effect: the valve pocket of valve is imported and exported and is arranged on usually on the relative bi-side of valve body, makes valve pocket import and export and is positioned on the axial sides of valve pocket.Through between valve plate axial sides and valve pocket import and export, the seal boss that cooperatively interacts being set; When valve plate in the valve pocket seal chamber during to lower slider; The lower surface of valve plate seal boss is pressed on the upper surface that valve pocket is imported and exported seal boss, between valve plate top and valve pocket import and export, forms sealing configuration; Owing to the seal boss that cooperatively interacts through setting forms face seal; The valve plate movement direction is identical with the movement direction of seal boss fitting surface; Can not produce the displacement parallel between valve plate seal boss and the import and export seal boss with sealing surface; For valve plate, do not have internal shear power, then sealing surface can not produce friction.Simultaneously; The bottom through the valve plate radial side is set and the bottom of valve pocket seal chamber are complementary; When valve plate in the valve pocket seal chamber during to lower slider, the bottom of valve plate radial side is pressed on the bottom of valve pocket seal chamber, at valve plate bottom and valve pocket bottom formation sealing configuration; Because bottom through the valve plate radial side is set and the pig of valve pocket seal chamber formation face seal; Equally; Because valve plate movement direction and valve pocket seal chamber bottom are perpendicular; Can not produce the displacement that parallels with surface of contact between the bottom of valve plate radial side and the valve pocket Seal cage body wall, for valve plate, not have internal shear power equally, same sealing face can not produce friction.
The seal combination of valve plate upper and lower has formed whole sealing like this, and the valve pocket that can effectively intercept valve pocket is imported and exported.Its sealing configuration is face seal, does not have friction or slight friction between the sealing surface, and sealing surface only bears impacting force, does not bear frictional force; For the metal valve plate, be sealed into hard sealing between the sealing surface, can not produce wearing and tearing between the sealing surface because of friction; For the valve plate of band rubber valve sleeve-board, be sealed into soft seal between the sealing surface, the valve plate cover does not bear frictional force, only bears impacting force, just is not easy to be torn, and makes big leap ahead of life-span of valve plate, and its sealing is more reliable, is not easy to produce leakage.In various pipelines,, can reduce the maintenance cost of pipeline greatly if all adopt the gate valve of this novel sealing structure.
Further; Comprise intermediate section and the changeover portion that is positioned at the intermediate section both sides through the bottom that the valve plate radial side is set; Its changeover portion is set to downward-sloping, makes intermediate section perpendicular to the projected length of the projected length on the horizontal plane of valve rod less than the bottom of valve plate radial side.Like this, make that the lower seal between valve plate and the valve pocket comprises intermediate section and changeover portion, wherein changeover portion can be pressed on the valve pocket Seal cage body wall towards having a down dip, and forms reliable sealing; When having avoided being connected with the top of valve plate radial side, exist vertically or towards the surface that tilts, pressure is not born on this surface when valve plate moves down can form the frictional force that sealing surfaces is caused wearing and tearing on the contrary because of intermediate section.
To combine accompanying drawing and embodiment that the present invention is described further below.
[description of drawings]
Shown in Figure 1 is the stereogram of the gate valve of novel sealing structure according to the invention;
Shown in Figure 2 is the explosive view of the gate valve of novel sealing structure according to the invention;
Fig. 3 a is depicted as the three-dimensional half sectional view of the gate valve of novel sealing structure according to the invention;
Fig. 3 b is depicted as another three-dimensional half sectional view of the gate valve of novel sealing structure according to the invention;
The gate valve that Fig. 3 c is depicted as novel sealing structure according to the invention is positioned at the three-dimensional cutaway view at valve plate lug boss position place;
The gate valve that Fig. 4 a is depicted as novel sealing structure according to the invention is in the three-dimensional cutaway view under the half-open position;
The gate valve that Fig. 4 b is depicted as novel sealing structure according to the invention is in the three-dimensional cutaway view under the full-gear;
Fig. 5 a is depicted as the sectional view of valve body body in the gate valve of novel sealing structure according to the invention;
Fig. 5 b is depicted as the three-dimensional cutaway view of valve body body in the gate valve of novel sealing structure according to the invention;
Fig. 6 a is depicted as the stereogram of valve plate in the gate valve of novel sealing structure according to the invention;
Fig. 6 b is depicted as the plan view of valve plate in the gate valve of novel sealing structure according to the invention.
[embodiment]
In the gate valve of novel sealing structure according to the invention, mainly comprise valve body 10, valve rod 20, valve plate 30 and handle 40.Wherein, be provided with the valve pocket 50 of bringing mouthful 51a and outlet 51b in the valve body 10, valve pocket 50 comprises the seal chamber 50a and the slip cavity 50b that supplies valve plate 30 to slide of bottom; The axial sides 30a of valve plate 30 and the valve pocket of valve pocket are imported and exported the fitting surface that is provided with seal boss 52,32, two seal bosses that cooperatively interact between 51a, the 51b and are formed the last sealing surface between valve plate and the valve pocket; The bottom of valve plate radial side 30b is set to the shape that matches with the bottom of valve pocket seal chamber 50a, makes the bottom of valve plate radial side and seal chamber bottom form lower sealing surface; When valve plate 30 intercepted valve pocket import and export 51a, 51b, the lower surface 32a of valve plate seal boss 32 just in time was pressed on the upper surface 52b that valve pocket is imported and exported seal boss 52, and the bottom of valve plate radial side 30b is pressed on the bottom of valve pocket seal chamber 50a simultaneously.
Like Fig. 1, shown in 2, in the preferred embodiment of the gate valve of novel sealing structure according to the invention, valve body 10 preferably is set comprises valve body body 11 and 12 two parts of valve gap, valve pocket 50 is combined to form by valve body body 11 and valve gap 12, with convenient processing and assembling.Valve body 10 relative both sides are provided with inlet tube 13 and outer pipe 14, are provided with valve pocket 50 in the valve body 10, and inlet tube 13 is the import 51a of valve pocket with the place of connection of valve pocket 50, and outer pipe 14 is the outlet 51b of valve pocket with the place of connection of valve pocket 50.Valve plate 30 is positioned at valve pocket 50 and can slides up and down; Tapped hole 15 screw-thread fit that are provided with on valve rod 20 and the valve gap, an end of valve rod 20 are rotationally connected with valve plate 30 and the other end is fixedly connected with handle 40 above the valve body.When handle with sleeve 40, thereby valve rod 20 rotates the upper and lower displacement that produces with respect to valve body 10 with respect to valve body 10, and then drives the slip cavity 50b up-down of valve plate 30 along valve pocket.When valve plate 30 was positioned at valve pocket 50 bottoms, the axial sides 30a of valve plate can import and export 51a with valve pocket respectively, 51b forms and is sealed and matched, and imported and exported 51a, 51b thereby intercept valve pocket, made gate valve be in closed condition; When valve plate 30 broke away from valve pocket 50 bottoms, the axial sides 30a of valve plate broke away from valve pocket and imports and exports 51a, 51b, thereby valve pocket is imported and exported 51a, 51b through valve pocket 50 connections, made gate valve be in open mode.
Shown in Fig. 3 a, 3b, 3c, 3d, the valve pocket of valve plate axial sides 30a and valve pocket is imported and exported between 51a, the 51b and is provided with the seal boss 52,32 that cooperatively interacts, and forms the sealing configuration on valve plate top; Matching with the bottom of valve pocket seal chamber 50a in the bottom of valve plate radial side 30b, forms the sealing configuration of valve plate bottom.
Shown in Fig. 6 a, 6b, valve pocket 50 comprises seal chamber 50a and slip cavity 50b, and the valve pocket valve pocket is imported and exported 51a, the 51b place is provided with seal boss 52, and sealing boss 52 is formed to valve plate 30 extensions by the Seal cage body wall.Valve pocket is imported and exported the shape of seal boss 52 and the shape of valve plate seal boss 32 is complementary, and makes valve plate 30 when intercepting valve pocket import and export 51a, 51b, and the lower surface 32a of valve plate seal boss just in time is pressed on the upper surface 52b that valve pocket is imported and exported seal boss.
Shown in Fig. 5 a, 5b, two axial sides of valve plate 30 are equipped with seal boss 32, and valve plate seal boss 32 is imported and exported 51a, 51b by valve plate axial sides 30a to valve pocket and extended and form.The bottom that valve plate radial side 30b preferably is set is set to the shape that is complementary with valve pocket seal chamber 50a; The bottom that valve plate radial side 30b preferably is set comprises intermediate section 30b1 and changeover portion 30b2; Changeover portion 30b2 is arranged on the both sides of intermediate section 30b1; Its changeover portion 30b2 is set to downward-sloping, and promptly intermediate section 30b1 is perpendicular to the projected length of the projected length on the horizontal plane of valve plate less than the bottom of valve plate radial side 30b; Like this when valve plate 30 when pressing down, can its changeover portion 30b2 be pressed on the seal chamber 50a wall so that the intermediate section 30b1 of valve plate radial side is pressed on valve pocket seal chamber 50a bottom, make that sealing is more reliable, and can be high pressure resistant.Particularly, the basifacial intermediate section 30b1 of valve plate radial side can be set is arc and changeover portion 30b2 is the inclined-plane.Wherein the angle of inclination on inclined-plane can be designed according to the required pressure and other parameters of bearing of gate valve, and when rated pressure was big, angle of inclination that can this changeover portion 30b2 was set to bigger, and this makes that the voltage endurance capability of this changeover portion 30b2 is stronger.
The arc that is shaped as of seal boss 52,32 preferably is set; And the length of valve plate seal boss 32 is imported and exported the length of seal boss 52 greater than valve pocket; Valve plate seal boss 32 can also extend to the bottom of valve plate radial side 30b to two ends when being pressed on the upper surface of valve pocket import and export seal boss 52 like this; Thereby form complete sealing, prevent to produce leakage at changeover portion 30b2.Preferably valve plate seal boss 32 and valve pocket are imported and exported seal boss 52 and all be set to circular arc, its radian is less than π.The internal diameter that valve pocket import and export seal boss 52 preferably is set equates that with the internal diameter that said valve pocket is imported and exported 51b the tube wall that the lower surface 52a of i.e. valve pocket import and export seal boss and valve pocket are imported and exported pipe 13,14 is continuous.
In the above-described embodiments; The two ends of valve plate seal boss 32 extend to the basifacial changeover portion 30b2 of valve plate radial side; The lower surface 32a that the valve plate seal boss preferably is set comprises seal section 32a1 and changeover portion 32a2; Its seal section 32a1 imports and exports seal boss 52 with valve pocket and matches, and its changeover portion 32a2 is positioned at the two ends of seal section 32a1, and the changeover portion 32a2 of valve plate seal boss lower surface extends to the middle part of basifacial intermediate section 30b1 of valve plate radial side or changeover portion 30b2.In valve pocket 50, can't directly be communicated with between the upper surface 32b of valve plate seal boss and the lower surface 32a like this, thereby form complete seal.
Comprise and valve pocket import and export seal boss seal section that cooperates and the changeover portion that is positioned at the seal section two ends through the lower surface that the valve plate seal boss is set; The two ends of valve plate seal boss extend to the basifacial changeover portion of valve plate radial side; Make the upper surface of valve plate seal boss be connected, and the changeover portion of valve plate seal boss lower surface extend to the middle part of basifacial intermediate section of valve plate radial side or changeover portion with the basifacial changeover portion of valve plate radial side.There are the juxtaposition part in last sealing surface and lower sealing surface at changeover portion between valve plate and the valve pocket like this; Make the lower sealing surface of valve plate can carry out the transition to sealing surface; Prevent to produce leakage, promptly in valve pocket 50, can't directly be communicated with between the upper surface 32b of valve plate seal boss and the lower surface 32a at transition position.
In the above-described embodiments, be provided with the slide rail 53 and chute 33 that cooperatively interact between the radial side 54b of valve pocket slip cavity and the said valve plate radial side 30b, in valve pocket 50, slide up and down to make things convenient for valve plate 30.Preferably slide rail 53 is arranged on the valve pocket sliding cavity body wall, chute 33 is arranged on the changeover portion 30b2 of valve plate radial side.The end face 52c that valve pocket import and export seal boss can be set matches with the axial sides 30a of valve plate; Make valve plate 30 between the end face 52c of valve pocket import and export seal boss, can slide up and down; And then can shorten the length of slide rail 53; Carrying out the working space that has increased cutter man-hour that adds of valve pocket 50, making that processing is more convenient.
Shown in Fig. 3 a, 3b, 3c; When gate valve is in closed condition; Valve plate 30 is positioned at valve pocket seal chamber 50a; Valve plate seal boss 32 was pressed on valve pocket and imported and exported on the seal boss 52 this moment, and valve plate 30 bottoms are pressed on the bottom of seal chamber 50a, made valve plate 30 and valve pocket import and export between 51a, the 51b and formed complete seal; Valve plate 30 is axially located and imports and exports between the end face 52c of seal boss at valve pocket simultaneously.Shown in Fig. 4 a; When handle with sleeve 40 moves up through valve rod 20 drive valve plates 30; The end face 52c that the axial sides 30a of valve plate imports and exports seal boss along valve pocket upwards slides, and this moment does not match with slide rail 53 in chute 33 below that is positioned at slide rail 53 of valve plate, and gate valve is in half-open position.Shown in Fig. 4 b; When further handle with sleeve 40; The chute 33 of valve plate slides to slide rail 53 lower ends and matches with slide rail 53, and this moment, the axial sides 30a of valve plate still matched with the end face 52c of valve pocket import and export seal boss, but its area of contact each other diminishes; Location through slide rail 53 and chute 33 makes that the slip of valve plate 30 in valve pocket 50 is more reliable, and this moment, gate valve was in full-gear.
The above embodiment has only expressed several kinds of mode of executions of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. the gate valve of a novel sealing structure comprises valve body, valve rod, valve plate and handle, is provided with the valve pocket of bringing mouth and outlet in the valve body, it is characterized in that, said valve pocket comprises the seal chamber of bottom and the slip cavity that the said valve plate of confession slides; The axial sides of said valve plate and the valve pocket of valve pocket are provided with the seal boss that cooperatively interacts between importing and exporting, and the bottom of said valve plate radial side is set to the shape that matches with the bottom of said valve pocket seal chamber; When said valve plate intercepted the valve pocket import and export, the lower surface of said valve plate seal boss just in time was pressed on the upper surface that said valve pocket is imported and exported seal boss, and the bottom of valve plate radial side is pressed on the bottom of valve pocket seal chamber simultaneously.
2. according to the said gate valve of claim 1, it is characterized in that said seal boss is set to arc, and the length of said valve plate seal boss is imported and exported the length of seal boss greater than said valve pocket; The two ends of said valve plate boss extend to the valve plate axial sides.
3. according to the said gate valve of claim 2, it is characterized in that said seal boss preferably is set to circular arc, its radian is less than π.
4. according to the said gate valve of claim 3, it is characterized in that the internal diameter that said valve pocket is imported and exported seal boss equates with the internal diameter that said valve pocket is imported and exported.
5. according to the said gate valve of claim 2; It is characterized in that; The bottom of said valve plate radial side comprises intermediate section and the changeover portion that is positioned at the intermediate section both sides; Its changeover portion is set to downward-sloping, makes intermediate section perpendicular to the projected length of the projected length on the horizontal plane of valve rod less than the bottom of valve plate radial side.
6. according to the said gate valve of claim 5, it is characterized in that the lower surface of said valve plate seal boss comprises with said valve pocket imports and exports seal boss seal section that cooperates and the changeover portion that is positioned at the seal section two ends; The two ends of said valve plate seal boss extend to the basifacial changeover portion of said valve plate radial side; Make the upper surface of valve plate seal boss be connected, and the changeover portion of valve plate seal boss lower surface extend to the middle part of basifacial intermediate section of said valve plate radial side or changeover portion with the basifacial changeover portion of said valve plate radial side.
7. according to the said gate valve of claim 6, it is characterized in that the basifacial intermediate section of said valve plate radial side is set to arc shaped surface and changeover portion is set to the inclined-plane.
8. according to each described gate valve in the claim 1 to 7, it is characterized in that, be provided with slide rail and the chute that cooperatively interacts between the slip cavity radial side of said valve pocket and the said valve plate radial side.
9. according to each described gate valve in the claim 1 to 7, it is characterized in that the end face that said valve pocket is imported and exported seal boss matches with said valve plate axial sides, make valve plate between the end face of valve pocket import and export seal boss, slide up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104030286A CN102494150A (en) | 2011-12-07 | 2011-12-07 | Gate valve with novel sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104030286A CN102494150A (en) | 2011-12-07 | 2011-12-07 | Gate valve with novel sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102494150A true CN102494150A (en) | 2012-06-13 |
Family
ID=46185997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104030286A Pending CN102494150A (en) | 2011-12-07 | 2011-12-07 | Gate valve with novel sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102494150A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374906A (en) * | 2018-04-25 | 2018-08-07 | 中海石油(中国)有限公司湛江分公司 | A kind of natural gas wellhead gate valve |
| JP6755573B1 (en) * | 2020-04-28 | 2020-09-16 | 株式会社水道技術開発機構 | A branch pipe forming device having a valve body combined lid and a valve body combined lid |
| CN112105854A (en) * | 2018-05-10 | 2020-12-18 | Smc 株式会社 | Gate valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374906A (en) * | 2018-04-25 | 2018-08-07 | 中海石油(中国)有限公司湛江分公司 | A kind of natural gas wellhead gate valve |
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| CN112105854A (en) * | 2018-05-10 | 2020-12-18 | Smc 株式会社 | Gate valve |
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| CN112105854B (en) * | 2018-05-10 | 2022-11-18 | Smc 株式会社 | Gate valve |
| JP6755573B1 (en) * | 2020-04-28 | 2020-09-16 | 株式会社水道技術開発機構 | A branch pipe forming device having a valve body combined lid and a valve body combined lid |
| JP2021173383A (en) * | 2020-04-28 | 2021-11-01 | Waterworks Technology Development Organization Co Ltd | Lid serving as valve body and branch pipe formation device including the same |
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Application publication date: 20120613 |