CN103322257A - Protection device of fuel gas valve - Google Patents
Protection device of fuel gas valve Download PDFInfo
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- CN103322257A CN103322257A CN2013102896635A CN201310289663A CN103322257A CN 103322257 A CN103322257 A CN 103322257A CN 2013102896635 A CN2013102896635 A CN 2013102896635A CN 201310289663 A CN201310289663 A CN 201310289663A CN 103322257 A CN103322257 A CN 103322257A
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Abstract
The invention provides a protection device of a fuel gas valve and belongs to the technical field of machines. The protection device of the fuel gas valve solves the problems that an existing fuel gas valve is low in safety performance and the like. The protection device of the fuel gas valve comprises a valve body, a valve rod and a valve element, wherein the valve body is provided with an air inlet pipe and an air outlet pipe, and the valve element is arranged in the valve body. One end of the valve rod is connected with the valve element, and the other end of the valve rod penetrates out of the valve body. The protection device is fixed in the valve body. The protection device comprises a shaft sleeve, a sealing shaft, a sealing gasket and a spring. The shaft sleeve is fixed in the valve body, and the sealing shaft is axially arranged in the shaft sleeve in a sliding and penetrating mode. One end of the sealing shaft is provided with the sealing gasket, the spring is sleeved on the sealing shaft, one end of the spring abuts against the sealing gasket, and the other end of the spring abuts against the shaft sleeve. When the spring is compressed, sealing is formed between the sealing gasket and the shaft sleeve so as to block circulation of fuel gas. The protection device of the fuel gas valve has the advantages of being simple in structure, good in safety performance, long in service life and the like.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of protective gear, particularly a kind of protective gear of gas valve.
Background technique
At present, combustion gas acts as a fuel, and has been deep into huge numbers of families, particularly big and medium-sized cities, and pipeline gas has been installed to the kitchen, and wherein gas valve is very important parts, opens or block pipeline gas by the switching of control gas valve.When using pipeline gas, particularly cooking when cooking, gaseous-pressure may make positive utensil extinguish when surpassing certain pressure, at this moment people just can't learn since pipeline gas air pressure too high that cause or since the problem of burner own cause.
In order to overcome the above problems, people have invented the gas valve that detects the combustion gas air pressure function that has of all kinds, and for example the Chinese patent literature data discloses the gas valve [application number: 200810120670.1 with pressure-detecting device; Notice of authorization number: CN101354097B], it comprises valve body, the valve rod with suction tude and steam outlet pipe and the spool that is positioned at valve body, one end and the spool of valve rod link, the other end passes valve body, have pressure tap on the suction tude, be provided with pressure-detecting device in the suction tude outside, suction tude is provided with and is axially fixed on the suction tude and the valve pocket that can circumferentially rotate, form sealing between valve pocket and the suction tude, move into the annular groove that all the time pressure tap is connected with pressure-detecting device when tracheae circumferentially rotates being provided with between valve pocket and the suction tude when valve pocket.
The gas valve of this kind structure, valve pocket are to be axially fixed on the suction tude and can circumferentially to rotate, and no matter how this gas pipeline is laid, and only need to rotate a valve pocket and just can make pressure valve be in best test position, and be easy to detect.But the gas valve of this kind structure in use; when gas flow is crossed gas valve; when the flow of combustion gas, pressure surpass normal pressure; the perhaps situation such as the damaged leakage of sebific duct; because the gas valve of this kind structure; itself does not have safety protection device, can't in time alleviate even discharges dangerous situation, and Safety performance is lower.
Summary of the invention
The objective of the invention is for the above-mentioned problems in the prior art, a kind of protective gear of simple in structure, gas valve that Safety performance is good is provided.
Purpose of the present invention can realize by following technical proposal: a kind of protective gear of gas valve; gas valve comprises the valve body with suction tude and steam outlet pipe; valve rod and the spool that is positioned at valve body; one end of described valve rod links to each other with spool; the other end passes valve body; it is characterized in that; described protective gear is fixed in the valve body; described protective gear comprises axle sleeve; seal shaft; gasket seal and spring; described axle sleeve is fixed in the valve body; described seal shaft is located in the axle sleeve along axial setting and the slip of axle sleeve; one end of described seal shaft is provided with described gasket seal; described spring housing is on seal shaft, and an end of described spring is resisted against on the gasket seal, and the other end is resisted against on the axle sleeve; when described spring was compressed, above-mentioned gasket seal can form sealing blocking-up gas circulation with axle sleeve.
Itself has elastic force spring, and the value of elastic of spring is certain, and the flow of combustion gas, when pressure is in normal state has the passage for gas circulation between the effect lower seal pad of spring force and axle sleeve, and combustion gas is normally circulated; When in case the flow of combustion gas surpasses normal flow rate or paranormal pressure, produce the thrust greater than spring force during fuel gas flow, combustion gas promotes the gasket seal Compress Spring, seal shaft moves axially along axle sleeve, makes gasket seal abut against a side of axle sleeve, forms airtight between gasket seal and the axle sleeve, the circulation of blocking-up combustion gas, combustion gas can not revealed, and gas accidents can not occur, and Safety performance is good; The purpose of blocking-up pipeline gas is simple in structure when just realizing the super stream of combustion gas, superpressure by spring, gasket seal, seal shaft and axle sleeve.
In the protective gear of above-mentioned a kind of gas valve; described protective gear also comprises adjusting nut; described adjusting nut and seal shaft are connected by screw thread, and described adjusting nut is positioned at the outside of gasket seal, and described gasket seal and seal shaft are slidingly connected.By precession or back-out adjusting nut, adjust the decrement of spring, thereby change the elastic force of spring, make the value of elastic of spring reach default value, regulate simple.
In the protective gear of above-mentioned a kind of gas valve, described gasket seal comprises hard gasket and soft sealing gasket, and described hard gasket and soft sealing gasket are connected by stickup.Can excessive deformation when hard gasket makes soft sealing gasket along the seal shaft move left and right, play the effect of support, soft sealing gasket is rubber gasket, produces certain deformation, good sealing effect during sealing.
In the protective gear of above-mentioned a kind of gas valve, the edge of described soft sealing gasket sidepiece has the convex annular ball, has the annular slope that is complementary with the convex annular ball on the described axle sleeve.When gasket seal and axle sleeve formation sealing, the convex annular ball is embedded in and forms sealing on the annular slope, increases sealing area, good sealing effect.
In the protective gear of above-mentioned a kind of gas valve; the center of described soft sealing gasket sidepiece has annular projection; the external diameter of described annular projection and the internal diameter of spring are complementary, and described spring housing is in the outside of annular projection, and an end of spring is resisted against on the soft sealing gasket.The annular projection plays the effect of retaining spring, makes the spring can double swerve, the spring good stability, and it is constant that the spring force value just keeps, and the spring force precision is high, makes the protection of this protective gear effective.
In the protective gear of above-mentioned a kind of gas valve, the center of described axle sleeve is fixed with guide cylinder, and described seal shaft is located in the guide cylinder, and the other end of described seal shaft has annular shoulder block.Guide cylinder play the guiding role, the internal diameter of guide cylinder and the external diameter of seal shaft are complementary, can not rock when making seal shaft along the axial left and right sides translation of axle sleeve, thereby make spring keep stable, the spring force precision is high, the annular shoulder block can not come off because of the elastic force of spring seal shaft in guide cylinder, simple in structure.
In the protective gear of above-mentioned a kind of gas valve, described guide cylinder is connected by fastener rings mutually with axle sleeve.Join strength is high.
In the protective gear of above-mentioned a kind of gas valve, the external diameter of described guide cylinder and the internal diameter of spring are complementary, and described spring housing is located at the outside of guide cylinder, and the other end of spring is resisted against on the fastener rings.Guide cylinder plays the effect of retaining spring, makes the spring can double swerve, the spring good stability, and it is constant that the spring force value just keeps, and the spring force precision is high, makes the protection of this protective gear effective.
In the protective gear of above-mentioned a kind of gas valve; one end of described axle sleeve is fixed with the air inlet cover by screw thread; described air inlet puts has inlet hole, and the cross-section area of described inlet hole is slightly less than the cross-section area of gasket seal, and described adjusting nut, gasket seal all are positioned at the air inlet cover.Inlet hole and gasket seal are over against setting, and air inlet cover steering flow flows into from inlet hole and all focuses on the gasket seal, makes the gasket seal front bear flow velocity and the pressure of combustion gas, and the thrust that produces is passed to spring accurately.
In the protective gear of above-mentioned a kind of gas valve, described protective gear is fixed in the spool, has seal ring between described axle sleeve and the spool.There is not potential safety hazard in gas valve when closing, this moment, protective gear was positioned at spool, did not bear the impact of the out-of-date generation of gas flow, reduced the operating time of this protective gear, long service life; When gas valve was opened, this protective gear was simultaneously in running order, effectively avoided because of gas accidentses such as overpressure of gas, super stream and the damaged leakages of sebific duct; slit between seal ring sealing axle sleeve and the spool; combustion gas can be from this slit seepage, good sealing effect, and the pressure sensitive precision is high.
In the protective gear of above-mentioned a kind of gas valve; described axle sleeve and spool drive fit are connected; have annular groove one on the madial wall of described spool, have annular groove two on the outer side wall of described axle sleeve, described seal ring is positioned at annular groove one and annular groove two.Axle sleeve and spool drive fit are connected, connect simple, annular groove one and annular groove two provide the mounting point of seal ring, seal ring is positioned at annular groove one and annular groove two, and the slit between sealing axle sleeve and the spool can not oozed out combustion gas between axle sleeve and spool, good sealing effect, and seal ring makes axle sleeve all be positioned at this position, place of spool in when location, during batch production, and the high conformity of product.
Compared with prior art, the protective gear of gas valve provided by the invention has the following advantages:
1, the protective gear of this gas valve is fixed in the spool; when gas valve is closed; do not exist combustion gas to surpass the problems such as stream, hypervelocity; this protective gear is in off working state; when gas valve was opened, this protective gear was in protective position and plays a protective role, this kind structure; effectively reduce the operating time of this protective gear, long service life.
2, the protective gear of this gas valve is adjusted the decrement of spring by adjusting nut, makes the elastic force of spring meet predefined value, regulates simple.
3, the protective gear spring housing of this gas valve is in the outside of seal shaft; one end of spring is enclosed within the outside of annular projection; the other end is enclosed within the outside of guide cylinder; the external diameter of annular projection and guide cylinder all is complementary with the internal diameter of spring, all spring is played the effect of location, the phenomenon that spring can not be offset; the spring good stability; the elastic constant of spring, the elastic force precision is high, and the protection of this protective gear is effective.
4, the protective gear of this gas valve is provided with the air inlet cover, and air inlet cover steering flow focuses on the gasket seal, and the thrust that fuel gas flow produces is born in the gasket seal front, and the thrust with combustion gas passes to spring accurately, and transmitting accuracy is high.
5, the soft sealing gasket of the protective gear of this gas valve week the outward side edge the convex annular ball and the annular slope on the circumferential inner side edge of axle sleeve edge be complementary, during sealing, the convex annular ball is close to and is combined on the annular slope good sealing effect.
Description of drawings
Fig. 1 is that this is with the overall structure sectional view of protective gear gas valve.
Sectional view when Fig. 2 is the protective gear normal operating condition of this gas valve.
Sectional view when Fig. 3 is the super stream of the protective gear of this gas valve, superpressure cut-off.
Fig. 4 is the side view of the protective gear axle sleeve of this gas valve.
Among the figure, 1, valve body; 1a, suction tude; 1b, steam outlet pipe; 2, valve rod; 3, spool; 4, axle sleeve; 4a, annular slope; 5, seal shaft; 5a, annular shoulder block; 6, gasket seal; 6a, hard gasket; 6b, soft sealing gasket; 6b1, convex annular ball; 6b2, annular projection; 7, spring; 8, seal ring; 9, adjusting nut; 10, guide cylinder; 11, fastener rings; 12, air inlet cover; 12a, inlet hole.
Embodiment
Below be specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, this gas valve comprises valve body 1, the valve rod 2 with suction tude 1a and steam outlet pipe 1b and the spool 3 that is positioned at valve body 1, one end of valve rod 2 links to each other with spool 3, the other end passes outside the valve body 1 and links to each other with handle, have pressure-detecting device on the steam outlet pipe 1b, and this pressure-detecting device can lay out tracheae 1b rotation.This protective gear is fixed in the spool 3, comprises axle sleeve 4, seal shaft 5, gasket seal 6, spring 7, adjusting nut 9, seal ring 8 and air inlet cover 12.
The internal diameter of the external diameter of axle sleeve 4 and spool 3 is complementary, axle sleeve 4 is by being tightly fixed in spool 3, has annular groove one on the madial wall of spool 3, has annular groove two on the outer side wall of axle sleeve 4, seal ring 8 is arranged in annular groove one and annular groove two, the slit between seal shaft 5 covers 4 and the spool 3, and the installation of axle sleeve 4 is played the effect of location, in the batch production, make each axle sleeve 4 be installed in same position in the spool 3.As shown in Figure 4, the center of axle sleeve 4 is fixed with guide cylinder 10 by fastener rings 11, guide cylinder 10 interior slips are equipped with seal shaft 5, seal shaft 5 is along the axial setting of guide cylinder 10, one end of seal shaft 5 is fixed with adjusting nut 9 by screw thread, the place, end that seal shaft 5 is positioned at the other end of guide cylinder 10 has annular shoulder block 5a, and adjusting nut 9 and annular shoulder block 5a can not come off seal shaft 5 in guide cylinder 10.The be slidingly located in outside of seal shaft 5 of gasket seal 6, comprise hard gasket 6a and soft sealing gasket 6b, hard gasket 6a is made by metallic material, and soft sealing gasket 6b is made by rubber material, and both are connected by stickup, and hard gasket 6a and adjusting nut 9 fit.The edge of soft sealing gasket 6b sidepiece has convex annular ball 6b1, has to the inside the annular slope 4a that is complementary with convex annular ball 6b1 the week of axle sleeve 4.The center of soft sealing gasket 6b sidepiece has annular projection 6b2, the external diameter of annular projection 6b2 and the internal diameter of spring 7 are complementary, the external diameter of guide cylinder 10 also is complementary with the internal diameter of spring 7, spring 7 is set on the seal shaft 5, one end of spring 7 is enclosed within the outside of annular projection 6b2, and be resisted against on the soft sealing gasket 6b, the other end is enclosed within the outside of guide cylinder 10, and be resisted against on the fastener rings 11, annular projection 6b2 and guide cylinder 10 all play the effect of location to spring 7, spring 7 can double swerve, the good stability of spring 7, elastic constant.One end of axle sleeve 4 is fixed with air inlet cover 12 by screw thread, has inlet hole 12a on the air inlet cover 12, when gas valve is opened, air inlet cover 12 is near the suction tude 1a of valve body 1, the cross-section area of inlet hole 12a is slightly less than the rank street area of gasket seal 6, and adjusting nut 9 and gasket seal 6 all are positioned at air inlet cover 12.
As shown in Figure 2; this kind state is the state of this protective gear when being in normal use; combustion gas enters in the spool 3 from suction tude 1a; all concentrate impact gasket seal 6 by the guiding function of air inlet cover 12; fuel gas flow is impacted the elastic force that the thrust that produces is less than or equals spring 7; be in the state of unlatching between gasket seal 6 and the axle sleeve 4, have the passage that passes through for combustion gas between gasket seal 6 and the axle sleeve 4.
As shown in Figure 3; this kind state is the state that this protective gear is in the protection cut-off; combustion gas is advanced as in spool 3 from suction tude 1a; all concentrate impact gasket seal 6 by the guiding function of air inlet cover 12; because combustion gas is in the situations such as super stream, superpressure; combustion gas is impacted the thrust of gasket seal 6 generations greater than the elastic force of spring 7; spring 7 is compressed; the interior formation of annular slope 4a that the convex annular ball 6b1 of soft sealing gasket 6b is resisted against axle sleeve 4 seals; the circulation of combustion gas in the cut-off gas valve; combustion gas can not revealed, and effectively avoids the generation of gas accidents.
Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has more used the terms such as valve body 1, suction tude 1a, steam outlet pipe 1b, valve rod 2, spool 3, axle sleeve 4, annular slope 4a, seal shaft 5, annular shoulder block 5a, gasket seal 6, hard gasket 6a, soft sealing gasket 6b, convex annular ball 6b1, annular projection 6b2, spring 7, seal ring 8, adjusting nut 9, guide cylinder 10, fastener rings 11, air inlet cover 12, inlet hole 12a, do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present invention; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (10)
1. the protective gear of a gas valve; gas valve comprises the valve body (1) of have suction tude (1a) and steam outlet pipe (1b); valve rod (2) and be positioned at the spool (3) of valve body (1); one end of described valve rod (2) links to each other with spool (3); the other end passes valve body (1); it is characterized in that; described protective gear is fixed in the valve body (1); described protective gear comprises axle sleeve (4); seal shaft (5); gasket seal (6) and spring (7); described axle sleeve (4) is fixed in the valve body (1); described seal shaft (5) is located in the axle sleeve (4) along axial setting and the slip of axle sleeve (4); one end of described seal shaft (5) is provided with described gasket seal (6); described spring (7) is enclosed within on the seal shaft (5); one end of described spring (7) is resisted against on the gasket seal (6); the other end is resisted against on the axle sleeve (4); when described spring (7) was compressed, above-mentioned gasket seal (6) can form sealing blocking-up gas circulation with axle sleeve (4).
2. the protective gear of a kind of gas valve according to claim 1; it is characterized in that; described protective gear also comprises adjusting nut (9); described adjusting nut (9) is connected by screw thread with seal shaft (5); and described adjusting nut (9) is positioned at the outside of gasket seal (6), and described gasket seal (6) is slidingly connected with seal shaft (5).
3. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; described gasket seal (6) comprises hard gasket (6a) and soft sealing gasket (6b), and described hard gasket (6a) and soft sealing gasket (6b) are connected by stickup.
4. the protective gear of a kind of gas valve according to claim 3; it is characterized in that; the edge of described soft sealing gasket (6b) sidepiece has convex annular ball (6b1), has the annular slope (4a) that is complementary with convex annular ball (6b1) on the described axle sleeve (4).
5. the protective gear of a kind of gas valve according to claim 3; it is characterized in that; the center of described soft sealing gasket (6b) sidepiece has annular projection (6b2); the internal diameter of the external diameter of described annular projection (6b2) and spring (7) is complementary; described spring (7) is enclosed within the outside of annular projection (6b2), and an end of spring (7) is resisted against on the soft sealing gasket (6b).
6. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; the center of described axle sleeve (4) is fixed with guide cylinder (10), and described seal shaft (5) is located in the guide cylinder (10), and the other end of described seal shaft (5) has annular shoulder block (5a).
7. the protective gear of a kind of gas valve according to claim 6 is characterized in that, described guide cylinder (10) is connected by fastener rings (11) mutually with axle sleeve (4).
8. the protective gear of a kind of gas valve according to claim 7; it is characterized in that; the internal diameter of the external diameter of described guide cylinder (10) and spring (7) is complementary, and described spring (7) is set in the outside of guide cylinder (10), and the other end of spring (7) is resisted against on the fastener rings (11).
9. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; one end of described axle sleeve (4) is fixed with air inlet cover (12) by screw thread; has inlet hole (12a) on the described air inlet cover (12); the cross-section area of described inlet hole (12a) is slightly less than the cross-section area of gasket seal (6), and described adjusting nut (9), gasket seal (6) all are positioned at air inlet cover (12).
10. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; described protective gear is fixed in the spool (3); has seal ring (8) between described axle sleeve (4) and the spool (3); described axle sleeve (4) is connected with spool (3) drive fit; have annular groove one on the madial wall of described spool (3), have annular groove two on the outer side wall of described axle sleeve (4), described seal ring (8) is positioned at annular groove one and annular groove two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310289663.5A CN103322257B (en) | 2013-07-10 | 2013-07-10 | Protection device of fuel gas valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310289663.5A CN103322257B (en) | 2013-07-10 | 2013-07-10 | Protection device of fuel gas valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103322257A true CN103322257A (en) | 2013-09-25 |
| CN103322257B CN103322257B (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310289663.5A Active CN103322257B (en) | 2013-07-10 | 2013-07-10 | Protection device of fuel gas valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103322257B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499849A (en) * | 2016-12-30 | 2017-03-15 | 玉环县中良铜业有限公司 | A kind of burnt gas leakage security valve |
| CN108980430A (en) * | 2018-07-18 | 2018-12-11 | 苏州福特曼机器人系统有限公司 | Overcurrent stop valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4846221A (en) * | 1987-05-21 | 1989-07-11 | Kitz Corporation | Ball valve with built-in check valve |
| CN2498423Y (en) * | 2001-08-21 | 2002-07-03 | 叶云勤 | Security valve against leakage of gas pipeline |
| JP2002310314A (en) * | 2001-04-10 | 2002-10-23 | Hitachi Metals Ltd | Excessive flow-preventing valve |
| EP1508730A1 (en) * | 2003-08-22 | 2005-02-23 | Metallwerke Otto Dingerkus GmbH | Excess flow valve for pipelines |
| CN201071946Y (en) * | 2007-08-06 | 2008-06-11 | 山东力诺瑞特新能源有限公司 | Ball check valve |
| CN201827468U (en) * | 2010-11-03 | 2011-05-11 | 标准液压独股公司 | Ball valve with check valve and filter |
| CN203384437U (en) * | 2013-07-10 | 2014-01-08 | 玉环燃具实业有限公司 | Protection device of fuel gas valve |
-
2013
- 2013-07-10 CN CN201310289663.5A patent/CN103322257B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4846221A (en) * | 1987-05-21 | 1989-07-11 | Kitz Corporation | Ball valve with built-in check valve |
| JP2002310314A (en) * | 2001-04-10 | 2002-10-23 | Hitachi Metals Ltd | Excessive flow-preventing valve |
| CN2498423Y (en) * | 2001-08-21 | 2002-07-03 | 叶云勤 | Security valve against leakage of gas pipeline |
| EP1508730A1 (en) * | 2003-08-22 | 2005-02-23 | Metallwerke Otto Dingerkus GmbH | Excess flow valve for pipelines |
| CN201071946Y (en) * | 2007-08-06 | 2008-06-11 | 山东力诺瑞特新能源有限公司 | Ball check valve |
| CN201827468U (en) * | 2010-11-03 | 2011-05-11 | 标准液压独股公司 | Ball valve with check valve and filter |
| CN203384437U (en) * | 2013-07-10 | 2014-01-08 | 玉环燃具实业有限公司 | Protection device of fuel gas valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499849A (en) * | 2016-12-30 | 2017-03-15 | 玉环县中良铜业有限公司 | A kind of burnt gas leakage security valve |
| CN108980430A (en) * | 2018-07-18 | 2018-12-11 | 苏州福特曼机器人系统有限公司 | Overcurrent stop valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103322257B (en) | 2015-05-06 |
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