CN103162088A - Safety type cylinder valve - Google Patents
Safety type cylinder valve Download PDFInfo
- Publication number
- CN103162088A CN103162088A CN201210325674XA CN201210325674A CN103162088A CN 103162088 A CN103162088 A CN 103162088A CN 201210325674X A CN201210325674X A CN 201210325674XA CN 201210325674 A CN201210325674 A CN 201210325674A CN 103162088 A CN103162088 A CN 103162088A
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- cavity
- current limliting
- piston
- cylinder valve
- safety type
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- 230000001012 protector Effects 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003116 impacting effect Effects 0.000 abstract 1
- 208000002925 dental caries Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
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Abstract
The invention discloses a safety type cylinder valve which comprises a valve body. The bottom of the valve body is connected with an overflow protector which comprises a flow limiter main body, a hollow flow-limiting piston and a piston limiting spring. A first cavity and a second cavity are formed inside the flow limiter main body, wherein the first cavity is used for gas transferring, the second cavity is linked up with the first cavity, and a conical seal seat is arranged at a linkage position of the first cavity and the second cavity. The hollow flow-limiting piston is arranged inside the second cavity and can move inside the second cavity in the axial direction. A conical seal surface is arranged on the upper end portion of the flow-limiting piston, and is matched with the seal seat to form a seal. An axial flow-limiting hole is formed on the upper end portion of the flow-limiting piston which is further provided with a radial overflow hole. The piston limiting spring is arranged between the flow limiter main body and the flow-limiting piston so as to exert axial force on the flow-limiting piston. The safety type cylinder valve is capable of preventing the impacting danger of a gas cylinder after the sudden failure of the cylinder valve.
Description
Technical field
The present invention relates to a kind of engineering part, relate in particular to a kind of gas cylinder valve.
Background technique
At present, positive-pressure air respirator is equipped as respiratory protection, is widely used in the every field such as fire-fighting, rescue, metallurgy, chemical industry, boats and ships and army.Its working principle is to store clean pressurized air by gas cylinder, after first being discharged into one-level pressure relief valve through cylinder valve, then enters full face mask after the decompression of steam supply valve secondary, provides the wearer to breathe use by face shield at last.The gas cylinder and the cylinder valve that wherein carry high pressure air play vital effect.
Under the pressure of 300bar, it is particularly important that the Safety performance of cylinder valve seems, in case cylinder valve fracture, high pressure compressed space moment in gas cylinder is released, the enormous impact power that produces will allow whole gas cylinder fly out as shell, and this is all a very large potential safety hazard to user and near personnel.Yet the cylinder valve that uses in existing market does not possess the safeguard function after the unexpected disconnection of cylinder valve.
Summary of the invention
The purpose of this invention is to provide a kind of safety type cylinder valve; this safety type cylinder valve is by after arranging overcurrent protector and realizing the unexpected fracture of cylinder valve; the purpose that pressurized air in gas cylinder slowly discharges; thereby the danger that the gas cylinder of avoiding after the unexpected fracture of cylinder valve the uncontrolled release of pressurized gas because of large flow to produce impacts is avoided unexpected fracture of cylinder valve and the potential safety hazard that causes.
In order to achieve the above object, the invention provides a kind of safety type cylinder valve, it comprises a valve body, and the bottom of this valve body is connected with an overcurrent protector, and this overcurrent protector comprises:
One restrictor main body, its inside has the first cavity of a supplied gas transmission, and second cavity that is connected with the first cavity, the joining place of described the first cavity and the second cavity has the sealing seat of a taper, and the long-pending radial cross section greater than the first cavity of the radial cross section of described the second cavity is long-pending;
The current limliting piston of one hollow, it is arranged in described the second cavity, and can move in described the second cavity along axial direction; The upper end portion of described current limliting piston has the sealing surface of a taper, sealing face and described sealing seat mate to form sealing, the upper end portion of described current limliting piston also offers an axial metering hole, with the current limliting piston of realizing hollow and the conducting of restrictor body interior cavity; Also be provided with the overflow hole that radially arranges on described current limliting piston, the diameter of described overflow hole is greater than the diameter of described metering hole;
One piston limit spring, it is arranged between described restrictor main body and current limliting piston to apply an axial force on the current limliting piston.
When inflating, gas enters overcurrent protector through valve body when gas cylinder, and inner at the filtration protector, at first gas enter the first cavity of restrictor main body, then enter the current limliting internal piston by the metering hole on the current limliting piston and overflow hole, then enters gas cylinder.
When the unexpected fracture of cylinder valve; pressurized gas in gas cylinder will outwards discharge by overcurrent protector; at first pressurized air enter the current limliting piston; relation due to pressure reduction; pressurized air overcomes the sealing seat that promotes current limliting piston towards restrictor main body after the elastic force of piston limit spring and moves, until sealing seat contacts to realize with sealing surface to seal.The interior pressurized air of gas cylinder this moment can only outwards slowly discharge by metering hole, and release so slowly can not cause the rebounce of gas cylinder, can play a protective role.
Further, the overcurrent protector in safety type cylinder valve of the present invention also comprises a filter, and its lower end with the restrictor main body is fixedly connected with, and has a filter cavity in described filter, this filter cavity and the conducting of current limliting piston.Safety type cylinder valve of the present invention is after being provided with filter, and effluent air before entering gas cylinder, is introduced into filter and filters from the current limliting piston, and then enters gas cylinder.
Further, described overcurrent protector is connected with valve body screw thread.
Further, also be provided with a seal washer between described overcurrent protector and valve body.
Further, the aperture of the metering hole of safety type cylinder valve of the present invention is 0.65mm-0.75mm.Can limit the flow of gas by the size that the metering hole aperture is set.
Further, the aperture of the metering hole in safety type cylinder valve of the present invention is 0.7mm.
Further, the described filter of safety type cylinder valve of the present invention is sintered filter.
Compare with existing cylinder valve, safety type cylinder valve of the present invention has higher Safety performance, can prevent the danger that gas cylinder impacts after cylinder valve chance failure, eliminate the potential safety hazard of bringing because of cylinder valve chance failure, guarantee gas cylinder user and staff's use safety on every side.
Description of drawings
Fig. 1 has shown that safety type cylinder valve of the present invention is arranged on the schematic diagram in gas cylinder.
Fig. 2 is the Split type structure schematic diagram of the overcurrent protector in one embodiment of safety type cylinder valve of the present invention.
Fig. 3 has shown overcurrent protector shown in Figure 2 work structuring under inflated condition.
Fig. 4 has shown overcurrent protector shown in Figure 2 work structuring when valve body meets accident fracture.
Embodiment
Below will reach according to a particular embodiment of the invention Figure of description safety type cylinder valve of the present invention is described further, but this explanation does not consist of limitation of the invention.
In the present embodiment, valve body 3 is equipped with an overcurrent protector 1 with the bottom that is connected of gas cylinder 2, is threaded connection between overcurrent protector 1 and valve body 3, seals with an O shape seal washer 4, as shown in Figure 1.
Fig. 2 has shown the Split type structure of overcurrent protector in the present embodiment.Fig. 3 has shown the sectional structure of this overcurrent protector.As shown in Figures 2 and 3, the overcurrent protector in the present embodiment 1 comprises current limliting piston 7 and the filter 8 of restrictor main body 5, piston limit spring 6, hollow.Restrictor main body 5, its inside has the first cavity 14 of supplied gas transmission, and the joining place of the second cavity 13, the first cavitys 14 that are connected with the first cavity 14 and the second cavity 13 to have a long-pending radial cross section greater than the first cavity 14 of radial cross section of sealing seat 11, the second cavitys 13 of taper long-pending.Current limliting piston 7, it is arranged in above-mentioned the second cavity 13, and can be along axial direction in the second interior movement of cavity 13; The upper end portion of this current limliting piston 7 has the sealing surface 12 of a taper, thereby sealing face 12 forms sealing with sealing seat 11 couplings, the upper end portion of current limliting piston 7 also offers an axial metering hole 9, with the conducting with restrictor main body 5 internal cavities of the current limliting piston 7 of realizing hollow, the aperture of this metering hole 9 is set as 0.65mm to 0.75mm, and is especially suitable when setting value is 0.7mm; Also be provided with the overflow hole 10 that radially arranges on current limliting piston 7, the diameter of overflow hole 10 is much larger than the diameter of metering hole 9; Piston limit spring 6 is arranged between restrictor main body 5 and current limliting piston 7 to apply an axial force on current limliting piston 7; Filter 8 is fixedly connected with the lower end of restrictor main body 5, the cavity 16 of filter 8 and current limliting piston 7 conductings of hollow.In the present embodiment, filter 8 adopts sintered filter.
Continuation is referring to Fig. 3; when gas cylinder in when inflation; gas A is through entering the inside of overcurrent protector 1 after valve body 3; at first gas A enters the first cavity 14 of restrictor main body 5; then enter the hollow cavity 15 of current limliting piston 7 by the metering hole 9 on current limliting piston 7 and overflow hole 10; then enter the cavity 16 of filter 8, enter after filtering gas cylinder 2.
Fig. 4 has shown overcurrent protector shown in Figure 2 working state when valve body meets accident fracture.As shown in Figure 4, during the unexpected fracture of valve body, the pressurized gas P in gas cylinder will outwards discharge by overcurrent protector 1, and at first pressurized gas P enters the hollow cavity 15 of current limliting piston 7 by the cavity 16 of sintered filter 8; Then due to the relation of pressure reduction, after pressurized gas P promotion current limliting piston 7 overcomes the elastic force of piston limit spring 6, press on the sealing seat 11 of restrictor main body 5, the close contact between the sealing seat 11 of the sealing surface 12 by current limliting piston 7 upper ends and restrictor main body 5 is realized sealing at last.The interior pressurized air P of gas cylinder this moment can only outwards discharge by metering hole 9.In the situation that current limliting piston 7 closures, the air mass flow by this metering hole 9 is per minute 1200 to rise to 1400 liters.Releasing compressed gas can not cause the rebounce of gas cylinder so slowly, thereby can play a protective role.
It should be noted that above cited embodiment only is specific embodiments of the invention.Obviously the present invention is not limited to above embodiment, and the similar variation of thereupon making or distortion are that those skilled in the art can directly draw or be easy to from content disclosed by the invention and just associate, and all should belong to protection scope of the present invention.
Claims (7)
1. safety type cylinder valve, it comprises a valve body, it is characterized in that, and the bottom of described valve body is connected with an overcurrent protector, and described overcurrent protector comprises:
One restrictor main body, its inside has the first cavity of a supplied gas transmission, and second cavity that is connected with the first cavity, the joining place of described the first cavity and the second cavity has the sealing seat of a taper, and the long-pending radial cross section greater than the first cavity of the radial cross section of described the second cavity is long-pending;
The current limliting piston of one hollow, it is arranged in described the second cavity, and can move in described the second cavity along axial direction; The upper end portion of described current limliting piston has the sealing surface of a taper, sealing face and described sealing seat mate to form sealing, the upper end portion of described current limliting piston also offers an axial metering hole, with the current limliting piston of realizing hollow and the conducting of restrictor body interior cavity; Also be provided with the overflow hole that radially arranges on described current limliting piston, the diameter of described overflow hole is greater than the diameter of described metering hole;
One piston limit spring, it is arranged between described restrictor main body and current limliting piston to apply an axial force on the current limliting piston.
2. safety type cylinder valve as claimed in claim 1, is characterized in that, described overcurrent protector also comprises a filter, and its lower end with the restrictor main body is fixedly connected with, and has a filter cavity in described filter, this filter cavity and the conducting of current limliting piston.
3. safety type cylinder valve as claimed in claim 1 or 2, is characterized in that, described overcurrent protector is connected with valve body screw thread.
4. safety type cylinder valve as claimed in claim 3, is characterized in that, also is provided with a seal washer between described overcurrent protector and valve body.
5. safety type cylinder valve as described in any one in claim 1,2 or 4, is characterized in that, the aperture of described metering hole is 0.65mm-0.75mm.
6. safety type cylinder valve as claimed in claim 5, is characterized in that, the aperture of described metering hole is 0.7mm.
7. safety type cylinder valve as claimed in claim 2, is characterized in that, described filter is sintered filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210325674.XA CN103162088B (en) | 2012-09-05 | 2012-09-05 | Safety type cylinder valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210325674.XA CN103162088B (en) | 2012-09-05 | 2012-09-05 | Safety type cylinder valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103162088A true CN103162088A (en) | 2013-06-19 |
| CN103162088B CN103162088B (en) | 2014-09-10 |
Family
ID=48585422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210325674.XA Active CN103162088B (en) | 2012-09-05 | 2012-09-05 | Safety type cylinder valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103162088B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345625A (en) * | 2016-05-06 | 2017-11-14 | 上海依格安全装备有限公司 | Safety relief device, cylinder valve and corresponding pressure bottle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161348A2 (en) * | 1984-05-15 | 1985-11-21 | Brian Tepsa | Gas fuse |
| CN2416311Y (en) * | 2000-04-18 | 2001-01-24 | 朱元海 | Pressure reducer for pressure bottle |
| WO2003095878A1 (en) * | 2002-05-08 | 2003-11-20 | Tepsa, Gordon, E. | Gas safety valve |
| CN2837662Y (en) * | 2005-05-26 | 2006-11-15 | 张珉 | Complete gas safety device |
| CN201137732Y (en) * | 2007-12-07 | 2008-10-22 | 张用军 | Safety protector for air duct |
| CN201992148U (en) * | 2011-03-16 | 2011-09-28 | 丹阳市飞轮气体阀门有限公司 | Natural gas cylinder valve flow-limiting device for vehicles |
| CN202938018U (en) * | 2012-09-05 | 2013-05-15 | 上海宝亚安全装备有限公司 | Safety-type cylinder valve |
-
2012
- 2012-09-05 CN CN201210325674.XA patent/CN103162088B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161348A2 (en) * | 1984-05-15 | 1985-11-21 | Brian Tepsa | Gas fuse |
| CN2416311Y (en) * | 2000-04-18 | 2001-01-24 | 朱元海 | Pressure reducer for pressure bottle |
| WO2003095878A1 (en) * | 2002-05-08 | 2003-11-20 | Tepsa, Gordon, E. | Gas safety valve |
| CN2837662Y (en) * | 2005-05-26 | 2006-11-15 | 张珉 | Complete gas safety device |
| CN201137732Y (en) * | 2007-12-07 | 2008-10-22 | 张用军 | Safety protector for air duct |
| CN201992148U (en) * | 2011-03-16 | 2011-09-28 | 丹阳市飞轮气体阀门有限公司 | Natural gas cylinder valve flow-limiting device for vehicles |
| CN202938018U (en) * | 2012-09-05 | 2013-05-15 | 上海宝亚安全装备有限公司 | Safety-type cylinder valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345625A (en) * | 2016-05-06 | 2017-11-14 | 上海依格安全装备有限公司 | Safety relief device, cylinder valve and corresponding pressure bottle |
| CN107345625B (en) * | 2016-05-06 | 2021-10-15 | 3M材料技术（广州）有限公司 | Safety relief device, cylinder valve and corresponding pressure cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103162088B (en) | 2014-09-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 201206 Shanghai city Pudong New Area jinzang Road No. 258 building 4 room 406 Patentee after: SHANGHAI BAOYA SAFETY EQUIPMENT CO.,LTD. Address before: 201206 Shanghai city Pudong New Area jinzang Road No. 258 building 4 room 406 Patentee before: SHANGHAI BAOYA SAFETY EQUIPMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |