CN103511682A - Method and special check valve for preventing contraflow of oil circuit of transformer - Google Patents
Method and special check valve for preventing contraflow of oil circuit of transformer Download PDFInfo
- Publication number
- CN103511682A CN103511682A CN201310433213.9A CN201310433213A CN103511682A CN 103511682 A CN103511682 A CN 103511682A CN 201310433213 A CN201310433213 A CN 201310433213A CN 103511682 A CN103511682 A CN 103511682A
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- CN
- China
- Prior art keywords
- baffle plate
- flange
- clack box
- transformer oil
- limiting board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
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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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0227—Check valves or pivoted valves with the valve members swinging around an axis located at the edge of or outside the valve member
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Transformer Cooling (AREA)
Abstract
The invention relates to a method and special check valve for preventing contraflow of an oil circuit of a transformer and belongs to the technical field of transformers. According to the technical scheme, a supporting plate is welded on the upper wall of a valve box, the supporting plate is of a shaft sleeve structure, a rotary shaft is arranged in the shaft sleeve, and a baffle is fixed on the rotary shaft; the upper end of the baffle is fixed on the rotary shaft, a first limiting base and a second limiting base are arranged on the two sides of the lower end of the baffle respectively, a first limiting plate is arranged on the lower wall of the interior of the valve box and is matched with the first limiting base, and a second limiting plate is arranged on the upper wall of the interior of the valve box and is matched with the second limiting base. The method and special check valve for preventing contraflow of the oil circuit of the transformer have the advantages that the structure is simple, installation is convenient, feasibility is strong, and the oil flow can be unblocked and cut off reliably. According to the method and special check valve for preventing contraflow of the oil circuit of the transformer, by means of the gravity principle, the check valve is superior to an electric check valve or a spring type check valve, and the problem that the oil flow of the check valve is blocked due to a power failure or spring failure is solved; due to the fact that the rotary shaft is located at the position of the protruding supporting plate, the influence on the forward oil flow is reduced, and the reverse oil flow is blocked more quickly and completely.
Description
Technical field
The present invention relates to method and Special check valve that a kind of transformer oil circuit prevents reverse flow, belong to transformer technology field.
Background technique
Transformer oil pump is the cooling power source of large oil immersed formula transformer forced oil-circulation, when transformer oil pump is standby, owing to there is no Special check valve, transformer oil reverse flow may occurs, and then cause oil circuit short circuit, is unfavorable for transformer heat radiation.
Summary of the invention
The object of this invention is to provide method and Special check valve that a kind of transformer oil circuit prevents reverse flow, increased oily Flow Velocity, improve reaction precision, and can stop more up hill and dale reverse oil flow, simple in structure, it is convenient to install, good manufacturability, easy to maintenance, circulation and the cut-off of oil stream are reliable, solve the problems referred to above that background technique exists.
Technological scheme of the present invention is: a kind of transformer oil circuit prevents the Special check valve of reverse flow, comprise dunnage, clack box, baffle plate, flange one, limiting board one, position limit socket one, position limit socket two, flange two, limiting board two, rotating shaft, transformer oil pump and transformer radiator, clack box is welded between flange one and flange two, the flow direction of transformer oil is from flange one to clack box, arrive again flange two, flange one is connected with transformer radiator collecting pipe, and flange two-way is crossed pipeline and is connected with transformer oil pump; The upper wall welding dunnage of clack box, dunnage is axle sleeve structure, and rotating shaft is set in axle sleeve, fixed dam in rotating shaft, baffle plate is positioned at clack box, and the area of baffle plate and the sectional area of clack box match; The upper end of baffle plate is fixed in rotating shaft, the two sides of baffle plate lower end arranges respectively position limit socket one and position limit socket two, limiting board one is set on clack box lower inner wall, match with position limit socket one, in clack box, on upper wall, limiting board two is set, matches with position limit socket two, with respect to transformer oil flow direction, dunnage is front, and limiting board two is rear; During use, the axis of flange one, clack box and flange two and 35 ° of placements of vertical line inclination, the flow direction of transformer oil is downward, and under normal state, baffle plate gravitate, naturally droops, and baffle plate arrives limiting board two places to be stopped, and forward transformer oil stream passes through smoothly; When producing reverse transformer oil stream, while being subject to transformer oil stream, act on, baffle plate is impacted, got back to limiting board Er position, now baffle plate is vertical with the axis of flange two with clack box, and clack box is closed and blocks, transformer oil circuit is blocked, thereby suppress reverse transformer oil stream.
Described clack box cross section is square, and baffle plate is also square; Dunnage is in the outer wall projection of clack box, and rotating shaft is arranged on high spot, has increased oily Flow Velocity, improves reaction precision, and can stop more up hill and dale reverse oil flow.
Because rotating shaft has been placed on protruding dunnage place, during transformer oil forward flow, because the obstacles such as rotating shaft are at high spot, pipeline is inner not to be hindered, little to the flow rate effect of transformer oil; When there is reverse oil flow, the impulse force of transformer oil acts on baffle plate completely, and baffle plate can, fast by plugging pipelines, stop reverse oil flow like this.
Described clack box arranges nameplate outward, marks transformer oil flow path direction on nameplate, is convenient to install and use.
On described position limit socket one and position limit socket two, be respectively equipped with beam one and beam two.
A kind of transformer oil circuit prevents the method for reverse flow, adopt above-mentioned Special check valve, this Special check valve comprises dunnage, clack box, baffle plate, flange one, limiting board one, position limit socket one, position limit socket two, flange two, limiting board two and rotating shaft, clack box is welded between flange one and flange two, the flow direction of transformer oil is from flange one to clack box, arrive flange two, flange one is connected with transformer radiator collecting pipe again, and flange two-way is crossed pipeline and is connected with transformer oil pump; The upper wall welding dunnage of clack box, dunnage is axle sleeve structure, and rotating shaft is set in axle sleeve, fixed dam in rotating shaft, baffle plate is positioned at clack box, and the area of baffle plate and the sectional area of clack box match; The upper end of baffle plate is fixed in rotating shaft, the two sides of baffle plate lower end arranges respectively position limit socket one and position limit socket two, limiting board one is set on clack box lower inner wall, match with position limit socket one, in clack box, on upper wall, limiting board two is set, matches with position limit socket two, with respect to transformer oil flow direction, dunnage is front, and limiting board two is rear; During use, the axis of flange one, clack box and flange two and 35 ° of placements of vertical line inclination, the flow direction of transformer oil is downward, and under normal state, baffle plate gravitate, naturally droops, and baffle plate arrives limiting board two places to be stopped, and forward transformer oil stream passes through smoothly; When producing reverse transformer oil stream, while being subject to transformer oil stream, act on, baffle plate is impacted, got back to limiting board Er position, now baffle plate is vertical with the axis of flange two with clack box, and clack box is closed and blocks, transformer oil circuit is blocked, thereby suppress reverse transformer oil stream.
Described clack box cross section is square, and baffle plate is also square; Dunnage is in the outer wall projection of clack box, and rotating shaft is arranged on high spot, has increased oily Flow Velocity, improves reaction precision, and can stop more up hill and dale reverse oil flow.
Described clack box arranges nameplate outward, on nameplate, mark transformer oil flow path direction, with arrow, indicate, during installation, arrow, should check before installation that whether arrow mark, rotating shaft position be correct down, check whether baffle plate rotates flexibly simultaneously, check valve and vertical line tilt 35 ° while placing, and baffle plate naturally droops, and with hand push, plays baffle plate, after stable, loosen baffle plate reciprocating swing number of times when there is no external force and be no less than three times, during installation, transformer radiator collecting pipe is positioned at flange one upside.
The present invention is open type check valve, can guarantee that oil stream only does one way flow, when transformer oil stream stipulates that with check valve oily flow path direction is contrary, and flapper closure, prevention transformer oil reverse flow; In addition, this structure has increased protruding dunnage on clack box, and rotating shaft is placed on to protruding dunnage place, has increased oily Flow Velocity, improves reaction precision, and can stop more up hill and dale reverse oil flow.This check valve is simple in structure, and it is convenient to install, and good manufacturability is easy to maintenance, and circulation and the cut-off of oil stream are reliable.
Good effect of the present invention: simple in structure, easy for installation, feasibility is strong; The circulation of oil stream and to block reliability strong; The present invention utilizes gravity principle to be better than the check valve of electronic or spring mode, because power supply or spring fault cause check valve oil stream to be obstructed; Rotating shaft position, at protruding dunnage place, reduces the impact on forward oil stream, stops more fast, thoroughly reverse oil flow.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention;
Fig. 2 is the side view of the embodiment of the present invention;
Fig. 3 is the plan view of the embodiment of the present invention;
Fig. 4 is the A-A cross-sectional schematic of the embodiment of the present invention;
Fig. 5 is embodiment of the present invention dunnage schematic diagram;
Fig. 6 is the side view of embodiment of the present invention dunnage;
Fig. 7 is embodiment of the present invention dunnage A-A cross-sectional schematic;
Fig. 8 is that the K of embodiment of the present invention dunnage is to schematic diagram;
Fig. 9 is the embodiment of the present invention one scheme of installation;
Figure 10 is the embodiment of the present invention two scheme of installations;
In figure: dunnage 1, clack box 2, baffle plate 3, flange 1, limiting board 1, beam 1, position limit socket 1, position limit socket 28, beam 29, flange 2 10, limiting board 2 11, rotating shaft 12, nameplate 13, transformer oil pump 14, transformer radiator 15, axis hole 16 and baffle plate rotation slot 17.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention will be further described.
A kind of transformer oil circuit prevents the Special check valve of reverse flow, comprise dunnage 1, clack box 2, baffle plate 3, flange 1, limiting board 1, position limit socket 1, position limit socket 28, flange 2 10, limiting board 2 11, rotating shaft 12, transformer oil pump 14 and transformer radiator 15, clack box is welded between flange one and flange two, the flow direction of transformer oil is from flange one to clack box, arrive again flange two, flange one is connected with transformer radiator collecting pipe, and flange two-way is crossed pipeline and is connected with transformer oil pump; The upper wall welding dunnage of clack box, dunnage is axle sleeve structure, and rotating shaft is set in axle sleeve, fixed dam in rotating shaft, baffle plate is positioned at clack box, and the area of baffle plate and the sectional area of clack box match; The upper end of baffle plate is fixed in rotating shaft, the two sides of baffle plate lower end arranges respectively position limit socket one and position limit socket two, limiting board one is set on clack box lower inner wall, match with position limit socket one, in clack box, on upper wall, limiting board two is set, matches with position limit socket two, with respect to transformer oil flow direction, dunnage is front, and limiting board two is rear; During use, the axis of flange one, clack box and flange two and 35 ° of placements of vertical line inclination, the flow direction of transformer oil is downward, and under normal state, baffle plate gravitate, naturally droops, and baffle plate arrives limiting board two places to be stopped, and forward transformer oil stream passes through smoothly; When producing reverse transformer oil stream, while being subject to transformer oil stream, act on, baffle plate is impacted, got back to limiting board Er position, now baffle plate is vertical with the axis of flange two with clack box, and clack box is closed and blocks, transformer oil circuit is blocked, thereby suppress reverse transformer oil stream.
Described clack box cross section is square, and baffle plate is also square; Dunnage is in the outer wall projection of clack box, and rotating shaft is arranged on high spot, has increased oily Flow Velocity, improves reaction precision, and can stop more up hill and dale reverse oil flow.
Described clack box arranges nameplate 13 outward, marks transformer oil flow path direction on nameplate, is convenient to install and use.
On described position limit socket one and position limit socket two, be respectively equipped with beam 1 and beam 29.
A kind of transformer oil circuit prevents the method for reverse flow, adopt above-mentioned Special check valve, this Special check valve comprises dunnage 1, clack box 2, baffle plate 3, flange 1, limiting board 1, position limit socket 1, position limit socket 28, flange 2 10, limiting board 2 11 and rotating shaft 12, clack box is welded between flange one and flange two, the flow direction of transformer oil is from flange one to clack box, arrive again flange two, flange one is connected with transformer radiator 15 collecting pipes, and flange two-way is crossed pipeline and is connected with transformer oil pump 14; The upper wall welding dunnage of clack box, dunnage is axle sleeve structure, and rotating shaft is set in axle sleeve, fixed dam in rotating shaft, baffle plate is positioned at clack box, and the area of baffle plate and the sectional area of clack box match; The upper end of baffle plate is fixed in rotating shaft, the two sides of baffle plate lower end arranges respectively position limit socket one and position limit socket two, limiting board one is set on clack box lower inner wall, match with position limit socket one, in clack box, on upper wall, limiting board two is set, matches with position limit socket two, with respect to transformer oil flow direction, dunnage is front, and limiting board two is rear; During use, the axis of flange one, clack box and flange two and 35 ° of placements of vertical line inclination, the flow direction of transformer oil is downward, and under normal state, baffle plate gravitate, naturally droops, and baffle plate arrives limiting board two places to be stopped, and forward transformer oil stream passes through smoothly; When producing reverse transformer oil stream, while being subject to transformer oil stream, act on, baffle plate is impacted, got back to limiting board Er position, now baffle plate is vertical with the axis of flange two with clack box, and clack box is closed and blocks, transformer oil circuit is blocked, thereby suppress reverse transformer oil stream.
Described clack box cross section is square, and baffle plate is also square; Dunnage is in the outer wall projection of clack box, and rotating shaft is arranged on high spot, has increased oily Flow Velocity, improves reaction precision, and can stop more up hill and dale reverse oil flow.
Described clack box arranges nameplate 13 outward, on nameplate, mark transformer oil flow path direction, with arrow, indicate, during installation, arrow, should check before installation that whether arrow mark, rotating shaft position be correct down, check whether baffle plate rotates flexibly simultaneously, check valve and vertical line tilt 35 ° while placing, and baffle plate naturally droops, and with hand push, plays baffle plate, after stable, loosen baffle plate reciprocating swing number of times when there is no external force and be no less than three times, during installation, transformer radiator collecting pipe is positioned at flange one upside.
With reference to accompanying drawing 5,6,7,8, dunnage is axle sleeve structure, and inside arranges axis hole 16 and baffle plate rotation slot 17, and rotating shaft is arranged in axis hole, and baffle plate is fixed in rotating shaft, and baffle plate is positioned at baffle plate rotation slot, is convenient to rotate.
Embodiment one, with reference to accompanying drawing 9, and during use, the axis of flange one, clack box and flange two and 35 ° of placements of vertical line inclination, during installation, transformer radiator collecting pipe is positioned at flange Yi upper left side.The flow direction of transformer oil is downward, and under normal state, baffle plate gravitate, naturally droops, and baffle plate arrives limiting board two places to be stopped, and forward transformer oil stream passes through smoothly; When producing reverse transformer oil stream, while being subject to transformer oil stream, act on, baffle plate is impacted, got back to limiting board Er position, now baffle plate is vertical with the axis of flange two with clack box, and clack box is closed and blocks, transformer oil circuit is blocked, thereby suppress reverse transformer oil stream.
Embodiment two, with reference to accompanying drawing 10, during use, the axis of flange one, clack box and flange two with the vertical line 35 ° of placements of tilting, during installation, transformer radiator collecting pipe is positioned at flange Yi upper right.
Claims (6)
1. a transformer oil circuit prevents the Special check valve of reverse flow, it is characterized in that: comprise dunnage (1), clack box (2), baffle plate (3), flange one (4), limiting board one (5), position limit socket one (7), position limit socket two (8), flange two (10), limiting board two (11), rotating shaft (12), transformer oil pump (14) and transformer radiator (15), clack box is welded between flange one and flange two, the flow direction of transformer oil is from flange one to clack box, arrive again flange two, flange one is connected with transformer radiator collecting pipe, flange two-way is crossed pipeline and is connected with transformer oil pump, the upper wall welding dunnage of clack box, dunnage is axle sleeve structure, and rotating shaft is set in axle sleeve, fixed dam in rotating shaft, baffle plate is positioned at clack box, and the area of baffle plate and the sectional area of clack box match, the upper end of baffle plate is fixed in rotating shaft, the two sides of baffle plate lower end arranges respectively position limit socket one and position limit socket two, limiting board one is set on clack box lower inner wall, match with position limit socket one, in clack box, on upper wall, limiting board two is set, matches with position limit socket two, with respect to transformer oil flow direction, dunnage is front, and limiting board two is rear, during use, the axis of flange one, clack box and flange two and 35 ° of placements of vertical line inclination, the flow direction of transformer oil is downward, and under normal state, baffle plate gravitate, naturally droops, and baffle plate arrives limiting board two places to be stopped, and forward transformer oil stream passes through smoothly, when producing reverse transformer oil stream, while being subject to transformer oil stream, act on, baffle plate is impacted, got back to limiting board Er position, now baffle plate is vertical with the axis of flange two with clack box, and clack box is closed and blocks, transformer oil circuit is blocked, thereby suppress reverse transformer oil stream.
2. a kind of transformer oil circuit according to claim 1 prevents the Special check valve of reverse flow, it is characterized in that: described clack box cross section is square, and baffle plate is also square; Dunnage is in the outer wall projection of clack box, and rotating shaft is arranged on high spot.
3. a kind of transformer oil circuit according to claim 1 and 2 prevents the Special check valve of reverse flow, it is characterized in that: on described position limit socket one and position limit socket two, be respectively equipped with beam one (6) and beam two (9).
4. a transformer oil circuit prevents the method for reverse flow, it is characterized in that: the Special check valve that adopts claim 1 to limit, this Special check valve comprises dunnage (1), clack box (2), baffle plate (3), flange one (4), limiting board one (5), position limit socket one (7), position limit socket two (8), flange two (10), limiting board two (11) and rotating shaft (12), clack box is welded between flange one and flange two, the flow direction of transformer oil is from flange one to clack box, arrive again flange two, flange one is connected with transformer radiator (15) collecting pipe, flange two-way is crossed pipeline and is connected with transformer oil pump (14), the upper wall welding dunnage of clack box, dunnage is axle sleeve structure, and rotating shaft is set in axle sleeve, fixed dam in rotating shaft, baffle plate is positioned at clack box, and the area of baffle plate and the sectional area of clack box match, the upper end of baffle plate is fixed in rotating shaft, the two sides of baffle plate lower end arranges respectively position limit socket one and position limit socket two, limiting board one is set on clack box lower inner wall, match with position limit socket one, in clack box, on upper wall, limiting board two is set, matches with position limit socket two, with respect to transformer oil flow direction, dunnage is front, and limiting board two is rear, during use, the axis of flange one, clack box and flange two and 35 ° of placements of vertical line inclination, the flow direction of transformer oil is downward, and under normal state, baffle plate gravitate, naturally droops, and baffle plate arrives limiting board two places to be stopped, and forward transformer oil stream passes through smoothly, when producing reverse transformer oil stream, while being subject to transformer oil stream, act on, baffle plate is impacted, got back to limiting board Er position, now baffle plate is vertical with the axis of flange two with clack box, and clack box is closed and blocks, transformer oil circuit is blocked, thereby suppress reverse transformer oil stream.
5. a kind of transformer oil circuit according to claim 4 prevents the method for reverse flow, it is characterized in that: described clack box cross section is square, and baffle plate is also square; Dunnage is in the outer wall projection of clack box, and rotating shaft is arranged on high spot, has increased oily Flow Velocity, improves reaction precision, and can stop more up hill and dale reverse oil flow.
6. according to a kind of transformer oil circuit described in claim 4 or 5, prevent the method for reverse flow, it is characterized in that: described clack box arranges nameplate (13) outward, on nameplate, mark transformer oil flow path direction, with arrow, indicate, during installation, arrow down, before installation, should check arrow mark, whether rotating shaft position is correct, check whether baffle plate rotates flexibly simultaneously, check valve and vertical line tilt 35 ° while placing, baffle plate naturally droops, with hand push, play baffle plate, after stable, loosening baffle plate reciprocating swing number of times when there is no external force is no less than three times, during installation, transformer radiator collecting pipe is positioned at flange one upside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310433213.9A CN103511682A (en) | 2013-09-23 | 2013-09-23 | Method and special check valve for preventing contraflow of oil circuit of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310433213.9A CN103511682A (en) | 2013-09-23 | 2013-09-23 | Method and special check valve for preventing contraflow of oil circuit of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103511682A true CN103511682A (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310433213.9A Pending CN103511682A (en) | 2013-09-23 | 2013-09-23 | Method and special check valve for preventing contraflow of oil circuit of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103511682A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701734A (en) * | 2017-10-23 | 2018-02-16 | 盐城市威隆管夹制造有限公司 | The vertical one-way pipeline valve that a kind of anti-non-return water pours in down a chimney |
| CN110863885A (en) * | 2019-12-04 | 2020-03-06 | 宁波楷世环保科技有限公司 | Ignition unit and low-energy-consumption diesel engine tail gas treatment system based on ignition unit |
| CN110905631A (en) * | 2019-12-04 | 2020-03-24 | 宁波楷世环保科技有限公司 | Low-energy-consumption diesel engine tail gas treatment system suitable for high exhaust flow |
| CN112420341A (en) * | 2020-12-07 | 2021-02-26 | 国网辽宁省电力有限公司电力科学研究院 | Automatic locking device of transformer respirator |
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| CN2168141Y (en) * | 1993-06-28 | 1994-06-08 | 尹玉兰 | Gas-water check valve of drainage horizontal tube |
| JP2000130617A (en) * | 1998-10-22 | 2000-05-12 | Seiichi Tan | Check valve for sanitary piping |
| CN2888211Y (en) * | 2005-12-16 | 2007-04-11 | 陆平 | Check valve for transportation |
| WO2007079658A1 (en) * | 2006-01-06 | 2007-07-19 | Yan Fai Yuen | A valve |
| CN201392707Y (en) * | 2009-01-19 | 2010-01-27 | 保定天威集团有限公司 | Check valve |
| CN202220887U (en) * | 2011-08-24 | 2012-05-16 | 宜兴市迪凡特机械制造有限公司 | Press-plate-type check valve |
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2013
- 2013-09-23 CN CN201310433213.9A patent/CN103511682A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2168141Y (en) * | 1993-06-28 | 1994-06-08 | 尹玉兰 | Gas-water check valve of drainage horizontal tube |
| JP2000130617A (en) * | 1998-10-22 | 2000-05-12 | Seiichi Tan | Check valve for sanitary piping |
| CN2888211Y (en) * | 2005-12-16 | 2007-04-11 | 陆平 | Check valve for transportation |
| WO2007079658A1 (en) * | 2006-01-06 | 2007-07-19 | Yan Fai Yuen | A valve |
| CN201392707Y (en) * | 2009-01-19 | 2010-01-27 | 保定天威集团有限公司 | Check valve |
| CN202220887U (en) * | 2011-08-24 | 2012-05-16 | 宜兴市迪凡特机械制造有限公司 | Press-plate-type check valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701734A (en) * | 2017-10-23 | 2018-02-16 | 盐城市威隆管夹制造有限公司 | The vertical one-way pipeline valve that a kind of anti-non-return water pours in down a chimney |
| CN110863885A (en) * | 2019-12-04 | 2020-03-06 | 宁波楷世环保科技有限公司 | Ignition unit and low-energy-consumption diesel engine tail gas treatment system based on ignition unit |
| CN110905631A (en) * | 2019-12-04 | 2020-03-24 | 宁波楷世环保科技有限公司 | Low-energy-consumption diesel engine tail gas treatment system suitable for high exhaust flow |
| CN110905631B (en) * | 2019-12-04 | 2021-02-26 | 宁波楷世环保科技有限公司 | Low-energy-consumption diesel engine tail gas treatment system suitable for high exhaust flow |
| CN112420341A (en) * | 2020-12-07 | 2021-02-26 | 国网辽宁省电力有限公司电力科学研究院 | Automatic locking device of transformer respirator |
| CN112420341B (en) * | 2020-12-07 | 2023-08-18 | 国网辽宁省电力有限公司电力科学研究院 | Automatic locking device of transformer respirator |
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Application publication date: 20140115 |