CN103162088B - Safety type cylinder valve - Google Patents
Safety type cylinder valve Download PDFInfo
- Publication number
- CN103162088B CN103162088B CN201210325674.XA CN201210325674A CN103162088B CN 103162088 B CN103162088 B CN 103162088B CN 201210325674 A CN201210325674 A CN 201210325674A CN 103162088 B CN103162088 B CN 103162088B
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- 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 23
- 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
- 230000015572 biosynthetic process Effects 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, first after cylinder valve is discharged into one-level pressure relief valve, then after the decompression of steam supply valve secondary, enters full face mask, finally provides wearer to breathe use by face shield.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, once cylinder valve ruptures, high pressure compressed space moment in gas cylinder is released, the enormous impact power producing will allow whole gas cylinder fly out as shell, and this is all a very large potential safety hazard to user and near personnel.But the cylinder valve using in existing market does not possess the safeguard function after cylinder valve surprisingly disconnects.
Summary of the invention
The object 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 cylinder valve and surprisingly rupture; the object that pressurized air in gas cylinder slowly discharges; thereby the danger that the gas cylinder producing because of the uncontrolled release of pressurized gas of large flow after avoiding cylinder valve surprisingly to rupture impacts, avoids cylinder valve surprisingly to rupture 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 being 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 radial cross section of described the second cavity is long-pending, and to be greater than the radial cross section of the first cavity long-pending;
The current limliting piston of one hollow, it is arranged in described the second cavity, and can in described the second cavity, move along axial direction; The upper end portion of described current limliting piston has the sealing surface of a taper, sealing face mates to form sealing with described sealing seat, the upper end portion of described current limliting piston also offers an axial metering hole, to realize the conducting of current limliting piston and restrictor body interior cavity of hollow; On described current limliting piston, be also provided with the overflow hole radially arranging, 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 current limliting piston.
When gas cylinder is in the time inflating, gas enters overcurrent protector through valve body, is filtering protector inside, and first gas enter the first cavity of restrictor main body, then enter current limliting internal piston by the metering hole on current limliting piston and overflow hole, then enters gas cylinder.
In the time that cylinder valve surprisingly ruptures; pressurized gas in gas cylinder will outwards discharge by overcurrent protector; first pressurized air enter current limliting piston; due to the relation of pressure reduction; pressurized air overcomes and promotes current limliting piston after the elastic force of piston limit spring and move towards the sealing seat of restrictor main body, until sealing seat contacts to realize sealing with sealing surface.Now the pressurized air in gas cylinder can only outwards slowly discharge by metering hole, discharges so slowly the rebounce that can not cause 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 it is fixedly connected with the lower end of restrictor main body, 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 being provided with after filter, and from current limliting piston, effluent air, entering before gas cylinder, is introduced into filter and filters, and then enters gas cylinder.
Further, described overcurrent protector is connected with valve body screw thread.
Further, between described overcurrent protector and valve body, be also provided with a seal washer.
Further, the aperture of the metering hole of safety type cylinder valve of the present invention is 0.65mm-0.75mm.By being set, the size in metering hole aperture can limit the flow of gas.
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.
Compared 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, ensure gas cylinder user and staff's use safety around.
Brief description of the 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 the work structuring of the overcurrent protector shown in Fig. 2 under inflated condition.
Fig. 4 has shown the work structuring of the overcurrent protector shown in Fig. 2 in the time that valve body meets accident fracture.
Embodiment
Below will be according to a particular embodiment of the invention and Figure of description safety type cylinder valve of the present invention is described further, but this explanation does not form limitation of the invention.
In the present embodiment, the bottom that is connected of valve body 3 and gas cylinder 2 is provided with an overcurrent protector 1, between overcurrent protector 1 and valve body 3, is threaded connection, and 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 1 in the present embodiment 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 the long-pending radial cross section that is greater than the first cavity 14 of the 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 interior movement of the second cavity 13; The upper end portion of this current limliting piston 7 has the sealing surface 12 of a taper, thereby sealing face 12 mates formation sealing with sealing seat 11, the upper end portion of current limliting piston 7 also offers an axial metering hole 9, to realize the current limliting piston 7 of hollow and the conducting of restrictor main body 5 internal cavities, the aperture of this metering hole 9 is set as 0.65mm to 0.75mm, especially suitable in the time that setting value is 0.7mm; On current limliting piston 7, be also provided with the overflow hole 10 radially arranging, 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.
Continue referring to Fig. 3; when gas cylinder is in the time inflating; gas A enters the inside of overcurrent protector 1 after valve body 3; 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 the cavity 16 that enters filter 8, enters gas cylinder 2 after filtering.
Fig. 4 has shown the working state of the overcurrent protector shown in Fig. 2 in the time that valve body meets accident fracture.As shown in Figure 4, when valve body surprisingly ruptures, the pressurized gas P in gas cylinder will outwards discharge by overcurrent protector 1, and 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, pressurized gas P promotes current limliting piston 7 and overcomes after the elastic force of piston limit spring 6, press on the sealing seat 11 of restrictor main body 5, finally realize sealing by the close contact between the sealing surface 12 of current limliting piston 7 upper ends and the sealing seat 11 of restrictor main body 5.Now the pressurized air P in gas cylinder can only outwards discharge by metering hole 9.The in the situation that of current limliting piston 7 closure, be per minute 1200 to rise to 1400 liters by the air mass flow of this metering hole 9.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 is only 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. a 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 being 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 radial cross section of described the second cavity is long-pending, and to be greater than the radial cross section of the first cavity long-pending;
The current limliting piston of one hollow, it is arranged in described the second cavity, and can in described the second cavity, move along axial direction; The upper end portion of described current limliting piston has the sealing surface of a taper, sealing face mates to form sealing with described sealing seat, the upper end portion of described current limliting piston also offers an axial metering hole, to realize the conducting of current limliting piston and restrictor body interior cavity of hollow; On described current limliting piston, be also provided with the overflow hole radially arranging, 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 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 it is fixedly connected with the lower end of restrictor main body, 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, is also provided with a seal washer between described overcurrent protector and valve body.
5. the 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 CN103162088A (en) | 2013-06-19 |
| CN103162088B true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109469822A (en) * | 2018-12-22 | 2019-03-15 | 显通向庆（台州）安全设备有限公司 | A kind of new type of safe bottle valve |
Citations (6)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095878A1 (en) * | 2002-05-08 | 2003-11-20 | Tepsa, Gordon, E. | Gas safety valve |
-
2012
- 2012-09-05 CN CN201210325674.XA patent/CN103162088B/en active Active
Patent Citations (6)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103162088A (en) | 2013-06-19 |
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| C14 | Grant of patent or utility model | ||
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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 |