CN103775666B - Gate valve - Google Patents
Gate valve Download PDFInfo
- Publication number
- CN103775666B CN103775666B CN201310753622.7A CN201310753622A CN103775666B CN 103775666 B CN103775666 B CN 103775666B CN 201310753622 A CN201310753622 A CN 201310753622A CN 103775666 B CN103775666 B CN 103775666B
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- Prior art keywords
- plane
- valve rod
- sealing
- sealing inclined
- valve
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Classifications
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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
- F16K3/14—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 with special arrangements for separating the sealing faces or for pressing them together
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
- F16K27/047—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members with wedge-shaped obturating members
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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
- F16K3/0209—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 the valve having a particular passage, e.g. provided with a filter, throttle or safety device
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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
- F16K3/0227—Packings
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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
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
Abstract
The invention discloses a kind of gate valve, comprise valve body, material feeding mouth and discharge port, right sealing inclined-plane and left sealing inclined-plane, flashboard, and this flashboard is connected with valve rod, handle is provided with above this valve rod, this flashboard comprises left plate body and right flank that left surface and this left sealing inclined-plane match and the right panel body that this right sealing inclined-plane matches, simultaneously, the bottom of the right flank of this left plate body is connected with left connecting rod prepared by rigid material, the bottom of the left surface of this right panel body is connected with right connecting rod prepared by rigid material, and this left side, the upper end of right connecting rod is all hinged at the lower end of this valve rod, this left side, the length sum of right connecting rod is greater than this left side, spacing between the bottom on right sealing inclined-plane, and, the lower slide of this valve rod is provided with connecting sleeve, the top of the top of the right flank of this left plate body and the left surface of this right panel body is hinged at left side and the right side of this connecting sleeve respectively, and this left side, extension spring is connected with between the bottom of right panel body.Advantage of the present invention is: sealing effect is better all the time.
Description
Technical field
The present invention relates to valve technology field, especially relate to a kind of gate valve.
Background technique
Gate valve is an of paramount importance class valve at present, and it is widely used in circulation and the cut-off of the media such as liquid, gas, dust.Usually, this gate valve comprises valve body, and this valve body lower portion has material feeding mouth and discharge port, and the right-hand member of the left end of this material feeding mouth and this discharge port all has sealing surface, and being provided with that between these 2 sealing surfaces, motive sealing coordinates can move up and down and the flashboard that can not rotate.Meanwhile, this flashboard top is connected with valve rod, and this valve rod top is connected with handle by screw-nut body.That is, after this rotatable handle, drive this valve rod to move up and down by this screw-nut body, this flashboard moves up and down and these 2 sealing inclined-planes is formed to sealing or open then, the final through or cut-off forming this material feeding mouth and this discharge port.
Along with the development of gate valve technology, in order to keep better sealing, these 2 sealing surfaces are all prepared as inclined-plane by the producer.Corresponding, this flashboard be prepared as small end under wedge shape, thus improve the sealing effect of this gate valve largely.
But even if after adopting aforesaid improvement, this gate valve also also exists following defect: 1, flashboard is slightly through time, namely may occur wearing and tearing, thus namely the inclination on this flashboard and/or sealing inclined-plane changes, sealing effect is had a greatly reduced quality then; 2, because valve rod does not stop the trend rotating or have rotation, thus the connecting part sealing effect of this valve rod top and this valve body is poor; 3, in screw-nut body, between leading screw outside thread and the internal thread of nut, there is machining error, thus there is matching gap between this leading screw and this nut, cause the action of this valve rod stable not; 4, seal inevitable existing sealing gasket on inclined-plane to be easy to be washed out by medium.
Summary of the invention
The object of this invention is to provide a kind of gate valve, it is better all the time that it has sealing effect, and the feature that the rotation of valve rod is comparatively stable.Further, it also has the feature of sealing gasket difficult drop-off.
The technical solution adopted in the present invention is: gate valve, comprise valve body, this valve body lower portion has material feeding mouth and discharge port, and the left side of this material feeding mouth has right sealing inclined-plane, the right side of this discharge port has left sealing inclined-plane, is provided with mating cavity, simultaneously between this left sealing inclined basifacial and the bottom on this right sealing inclined-plane, this gate valve comprises the flashboard that left and right sides match with this left and right sealing inclined-plane, and this flashboard is connected with valve rod, be provided with handle above this valve rod
---described flashboard comprises left plate body and right flank that left surface and this left sealing inclined-plane match and the right panel body that this right sealing inclined-plane matches, simultaneously, the bottom of the right flank of this left plate body is connected with left connecting rod prepared by rigid material, the bottom of the left surface of this right panel body is connected with right connecting rod prepared by rigid material, and this left side, the upper end of right connecting rod is all hinged at the lower end of this valve rod, this left side, the length sum of right connecting rod is greater than this left side, spacing between the bottom on right sealing inclined-plane, and, the lower slide of this valve rod is provided with connecting sleeve, the top of the top of the right flank of this left plate body and the left surface of this right panel body is hinged at left side and the right side of this connecting sleeve respectively, and this left side, extension spring is connected with between the bottom of right panel body,
---the bottom of described valve rod is provided with first step, and this first step is positioned at the top of this connecting sleeve;
---the middle part of described valve body is provided with Seal cage, top is provided with connection chamber, this valve rod is from bottom to up through sealing chamber, the upper end of this valve rod is positioned at this connection chamber, the top of this valve rod is provided with screw along the shaft axis of this valve rod, this screw has trapezoidal internal thread, and meanwhile, the shaft axis place of this handle is fixed with in vertical stud, this stud has trapezoidal outside thread, this stud and this screw threaded; The upper end of this valve rod is provided with second step, is provided with the first stage clip between this second step and bottom of this connection chamber, and the middle part of this stud is provided with the 3rd step, and the 3rd is provided with the second stage clip between step and the top of this connection chamber;
---the middle part of this valve rod is provided with the 4th step, and the 4th step is positioned at sealing chamber, and the cover that the 4th step is sealed and matched has thread bush, and the upper end of this thread bush is sealedly attached to the top in sealing chamber.
Be lined with a sheet rubber in described mating cavity, the left and right two ends of this sheet rubber are individually fixed in the lower right part on this left sealing inclined-plane and the lower left quarter on this right sealing inclined-plane.
The lower left quarter of described material feeding mouth is provided with a guide ramp upwards extended.
The present invention is advantageously: 1, sealing effect is better all the time.The flashboard of gate valve of the present invention is made up of the left plate body that can change along with the angle change on sealing inclined-plane (comprising left sealing inclined-plane and right sealing inclined-plane) and right panel body, thus being no matter that this flashboard or sealing inclined-plane are worn and angle of inclination changes, this flashboard and sealing inclined-plane can remain good sealing all the time.Simultaneously, this gate valve is by directly forming the mode of leading screw by the top at this valve rod of original technology, being improved to this leading screw is positioned on this handle, and the nut be mated is fixed on the top of this valve rod, avoid situation when this valve rod moves up and down with larger rotating tendency, making to be able between the top in this valve rod and sealing chamber can connecting thread cover, and then effectively ensure that the excellent sealing of connecting part of this valve rod and this valve body.2, the rotation of valve rod is comparatively stable.By the setting of 2 stage clips (i.e. the first stage clip and the second stage clip), this valve rod is had all the time and to the trend of top offset, this stud, there is trend to bottom offset all the time, eliminate the mismatch error between the outside thread of this stud and the internal thread of this screw, make the movement of this valve rod comparatively stable and accurate.3, sealing gasket difficult drop-off.Be easy to be washed away and mostly being of coming off is arranged at the oblique basifacial sealing gasket of sealing, and gate valve of the present invention is by arranging guide ramp, makes medium reduce to wash away dynamics to the oblique basifacial sealing gasket of sealing.Meanwhile, sealing pad is prepared as the preparation of employing one monoblock sheet rubber, also reduces the probability that sealing pad comes off.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is the front sectional view of embodiments of the invention.
In figure: 10, valve body, 11, material feeding mouth, 111, right sealing inclined-plane, 112, guide ramp, 12, discharge port, 121, left sealing inclined-plane, 13, Seal cage, 14, connection chamber, 15, mating cavity; 21, left plate body, 22, right panel body, 231, left connecting rod, 232, right connecting rod, 24, connecting sleeve, 25, extension spring; 30, valve rod, 31, first step, 32, screw, 33, second step, the 34, the 4th step, 35, limited step; 40, handle, 41, stud, the 411, the 3rd step; 51, the first stage clip, the 52, second stage clip; 60, thread bush; 70, sheet rubber.
Embodiment
Embodiment, as shown in Figure 1: gate valve, comprise valve body 10, this valve body 10 bottom has material feeding mouth 11 and discharge port 12, and the left side of this material feeding mouth 11 has right sealing inclined-plane 111, the right side of this discharge port 12 has left sealing inclined-plane 121, is provided with mating cavity 15 between this left bottom, sealing inclined-plane 121 and the bottom on this right sealing inclined-plane 111.Meanwhile, this gate valve comprises the flashboard that left and right sides match with this left sealing inclined-plane 121, right sealing inclined-plane 111, and this flashboard is connected with valve rod 30, is provided with handle 40 above this valve rod 30.Obviously, this mating cavity 15, for when the downward translation of this flashboard seals with sealing inclined-plane then, makes the bottom of this flashboard have holding space.
Further say:
This flashboard comprises left plate body 21 and right flank that left surface and this left sealing inclined-plane 121 match and the right panel body 22 that this right sealing inclined-plane 111 matches.The bottom of the right flank of this left plate body 21 is connected with left connecting rod 231 prepared by rigid material, the bottom of left surface of this right panel body 22 is connected with right connecting rod 232 prepared by rigid material, and the upper end of this left connecting rod 231, this right connecting rod 232 is all hinged at the lower end of this valve rod 30.The length sum of this left connecting rod 231, this right connecting rod 232 is greater than the spacing between the bottom on this left sealing inclined-plane 121, this right sealing inclined-plane 111.And the lower slide of this valve rod 30 is provided with connecting sleeve 24, the top of the top of the right flank of this left plate body 21 and the left surface of this right panel body 22 is hinged at left side and the right side of this connecting sleeve 24 respectively.Certainly, the below this valve rod 30 being positioned at this connecting sleeve 24 also can be provided with limited step 35, excessively glides along this valve rod 30 for avoiding this connecting sleeve 24.And, be connected with extension spring 25 between the bottom of this left plate body 21, this right panel body 22.
The bottom of this valve rod 30 is provided with first step 31, and this first step 31 is positioned at the top of this connecting sleeve 24.This first step 31 can not only avoid this connecting sleeve 24 undue along this valve rod 30 on move, and by rational adjusted position postpone, to force this flashboard to form better sealing to bottom offset and then to sealing inclined-plane on the upper-end surface that can withstand on this connecting sleeve 24.
The middle part of this valve body 10 is provided with Seal cage 13, top is provided with connection chamber 14.This valve rod 30 is from bottom to up through sealing chamber 13, and the upper end of this valve rod 30 is positioned at this connection chamber 14.The top of this valve rod is provided with screw 32 along the shaft axis of this valve rod 30, and this screw 32 has trapezoidal internal thread.Meanwhile, the shaft axis place of this handle 40 is fixed with in vertical stud 41, and this stud 41 has trapezoidal outside thread.This stud 41 and this screw 23 threaded.The upper end of this valve rod 30 is provided with second step 33, is provided with the first stage clip 51 between this second step 33 and bottom of this connection chamber 14.The middle part of this stud 41 is provided with between the 3rd step the 411, three step 411 and the top of this connection chamber 14 and is provided with the second stage clip 52.
The middle part of this valve rod 30 is provided with the 4th step the 34, four step 34 and is positioned at the cover that sealing chamber the 13, four step 34 is sealed and matched and has thread bush 60, and the upper end of this thread bush 60 is sealedly attached to the top in sealing chamber 13.Certainly, this thread bush 60 is enclosed within this valve rod 30.
Be lined with a sheet rubber 70 in this mating cavity 15, the left and right two ends of this sheet rubber 70 are individually fixed in the lower right part on this left sealing inclined-plane 121 and the lower left quarter on this right sealing inclined-plane 111.
The lower left quarter of this material feeding mouth 11 is provided with a guide ramp upwards extended 112.
In sum: 1, when this gate valve of needs ends, turn handle, this handle drives stud to rotate, and by the cooperation of this stud with this screw, makes this valve rod irrotational to bottom offset.Owing to being connected with extension spring between left plate body now and right panel body bottom, and any friction can not be subject between this left plate body and outside of this right panel body, so this left plate body and this right panel body move downwards smoothly, until the bottom of the left surface of this left plate body and this left sealing contact of incline plane, after the bottom of the right flank of this right panel body and the lower contacts on this right sealing inclined-plane, the angle of this left connecting rod and right connecting rod progressively increases, the width of this left plate body and this right panel body bottom is progressively increased, the angle of inclination of this left plate body final is same as the angle of inclination on this left sealing inclined-plane, the angle of inclination of this right panel body is same as the angle of inclination on this right sealing inclined-plane, then this flashboard and sealing inclined-plane form fabulous sealing and can remain.Simultaneously, when this gate valve of needs is opened, when after this handle of counterrotating, this valve rod drives this flashboard to move up, first the width of the bottom of this left plate body and this right panel body narrows, make, between this flashboard and sealing inclined-plane, there is gap, and then be not only beneficial to this flashboard upwards frictionless to move and comparatively laborsaving, and be beneficial to the wearing and tearing reduced between this flashboard and sealing inclined-plane.2, the connecting part of valve rod and this valve body has excellent sealing.This gate valve is by directly forming the mode of leading screw by the top at this valve rod of original technology, being improved to this leading screw is positioned on this handle, and the nut be mated is fixed on the top of this valve rod, avoiding must be adjoint to be subject to the situation compared with high pulling torque when this valve rod moves up and down, making to be able between the top in this valve rod and sealing chamber can connecting thread cover, and then effectively ensure that the excellent sealing of connecting part of this valve rod and this valve body.3, the rotation of valve rod is comparatively stable.By the setting of 2 stage clips (i.e. the first stage clip and the second stage clip), this valve rod is had all the time and to the trend of top offset, this stud, there is trend to bottom offset all the time, eliminate the mismatch error between the outside thread of this stud and the internal thread of this screw, make the movement of this valve rod comparatively stable and accurate.3, sealing gasket difficult drop-off.The sealing gasket mostly being the bottom being arranged at sealing inclined-plane come off owing to being easy to be washed away, gate valve of the present invention, by arranging guide ramp, reduces after making medium have suitable flow trace to wash away dynamics to the oblique basifacial sealing gasket of sealing.Meanwhile, sealing pad is prepared as the preparation of employing one monoblock sheet rubber, also reduces the probability that sealing pad comes off.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (1)
1. gate valve, comprise valve body (10), this valve body (10) bottom has material feeding mouth (11) and discharge port (12), and the left side of this material feeding mouth (11) has right sealing inclined-plane (111), the right side of this discharge port (12) has left sealing inclined-plane (121), mating cavity (15) is provided with between the bottom of this (121) bottom, left sealing inclined-plane and this right sealing inclined-plane (111), simultaneously, this gate valve comprises left and right sides and this left side, right sealing inclined-plane (121, 111) flashboard matched, and this flashboard is connected with valve rod (30), this valve rod (30) top is provided with handle (40), it is characterized in that:
---described flashboard comprises left plate body (21) and right flank that left surface and this left sealing inclined-plane (121) match and the right panel body (22) that this right sealing inclined-plane (111) matches, simultaneously, the bottom of the right flank of this left plate body (21) is connected with left connecting rod (231) prepared by rigid material, the bottom of the left surface of this right panel body (22) is connected with right connecting rod (232) prepared by rigid material, and this left side, right connecting rod (231, 232) upper end is all hinged at the lower end of this valve rod (30), this left side, right connecting rod (231, 232) length sum is greater than this left side, right sealing inclined-plane (121, 111) spacing between bottom, and, the lower slide of this valve rod (30) is provided with connecting sleeve (24), the top of the top of the right flank of this left plate body (21) and the left surface of this right panel body (22) is hinged at left side and the right side of this connecting sleeve (24) respectively, and this left side, right panel body (21, 22) extension spring (25) is connected with between bottom,
---the bottom of described valve rod (30) is provided with first step (31), and this first step (31) is positioned at the top of this connecting sleeve (24);
---the middle part of described valve body (10) is provided with Seal cage (13), top is provided with connection chamber (14), this valve rod (30) is from bottom to up through sealing chamber (13), the upper end of this valve rod (30) is positioned at this connection chamber (14), the top of this valve rod is provided with screw (32) along the shaft axis of this valve rod (30), this screw (32) has trapezoidal internal thread, simultaneously, the shaft axis place of this handle (40) is fixed with in vertical stud (41), this stud (41) has trapezoidal outside thread, this stud (41) and this screw (32) threaded, the upper end of this valve rod (30) is provided with second step (33), the first stage clip (51) is provided with between the bottom of this second step (33) and this connection chamber (14), the middle part of this stud (41) is provided with the 3rd step (411), is provided with the second stage clip (52) between the 3rd step (411) and the top of this connection chamber (14),
---the middle part of this valve rod (30) is provided with the 4th step (34), 4th step (34) is positioned at sealing chamber (13), the cover that 4th step (34) is sealed and matched has thread bush (60), and the upper end of this thread bush (60) is sealedly attached to the top of sealing chamber (13);
Be lined with a sheet rubber (70) in described mating cavity (15), the left and right two ends of this sheet rubber (70) are individually fixed in the lower right part of this left sealing inclined-plane (121) and the lower left quarter of this right sealing inclined-plane (111);
The lower left quarter of described material feeding mouth (11) is provided with a guide ramp upwards extended (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753622.7A CN103775666B (en) | 2013-12-30 | 2013-12-30 | Gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753622.7A CN103775666B (en) | 2013-12-30 | 2013-12-30 | Gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103775666A CN103775666A (en) | 2014-05-07 |
| CN103775666B true CN103775666B (en) | 2016-03-16 |
Family
ID=50568244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310753622.7A Active CN103775666B (en) | 2013-12-30 | 2013-12-30 | Gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103775666B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523727B (en) * | 2017-01-12 | 2018-01-23 | 江苏圣泰阀门有限公司 | A kind of HTHP gate valve |
| CN108506515B (en) * | 2018-06-19 | 2020-06-26 | 上海亚核阀业成套有限公司 | Ball valve with spiral guide rail |
| US11486499B2 (en) | 2018-12-14 | 2022-11-01 | Kitz Corporation | Gate valve |
| CN113418018A (en) * | 2021-07-07 | 2021-09-21 | 洛阳三旋智能装备有限公司 | Long-life propane dehydrogenation reactor valve |
| CN113898742A (en) * | 2021-10-19 | 2022-01-07 | 浙江中控流体技术有限公司 | Lower-expansion type discharge valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2046166U (en) * | 1989-04-17 | 1989-10-18 | 王佐才 | Expanding dual valve clacks sluice valve |
| EP1061301A2 (en) * | 1999-06-14 | 2000-12-20 | SMC Kabushiki Kaisha | Gate valve |
| CN202852035U (en) * | 2012-10-29 | 2013-04-03 | 宣达实业集团有限公司 | Gate valve |
| CN203335900U (en) * | 2013-06-28 | 2013-12-11 | 温州蓝天管件阀门有限公司 | Stretching type double-flat-plate gate valve |
| CN103470797A (en) * | 2013-09-24 | 2013-12-25 | 宣达实业集团有限公司 | Friction-free flat gate valve resistant to high temperature and high pressure |
| CN203703202U (en) * | 2013-12-30 | 2014-07-09 | 宁波市天基隆智控技术有限公司 | Gate valve |
-
2013
- 2013-12-30 CN CN201310753622.7A patent/CN103775666B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2046166U (en) * | 1989-04-17 | 1989-10-18 | 王佐才 | Expanding dual valve clacks sluice valve |
| EP1061301A2 (en) * | 1999-06-14 | 2000-12-20 | SMC Kabushiki Kaisha | Gate valve |
| CN202852035U (en) * | 2012-10-29 | 2013-04-03 | 宣达实业集团有限公司 | Gate valve |
| CN203335900U (en) * | 2013-06-28 | 2013-12-11 | 温州蓝天管件阀门有限公司 | Stretching type double-flat-plate gate valve |
| CN103470797A (en) * | 2013-09-24 | 2013-12-25 | 宣达实业集团有限公司 | Friction-free flat gate valve resistant to high temperature and high pressure |
| CN203703202U (en) * | 2013-12-30 | 2014-07-09 | 宁波市天基隆智控技术有限公司 | Gate valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103775666A (en) | 2014-05-07 |
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