CN202938018U - Safety-type cylinder valve - Google Patents
Safety-type cylinder valve Download PDFInfo
- Publication number
- CN202938018U CN202938018U CN 201220448806 CN201220448806U CN202938018U CN 202938018 U CN202938018 U CN 202938018U CN 201220448806 CN201220448806 CN 201220448806 CN 201220448806 U CN201220448806 U CN 201220448806U CN 202938018 U CN202938018 U CN 202938018U
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- China
- Prior art keywords
- cavity
- piston
- current limliting
- cylinder valve
- type cylinder
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a safety-type cylinder valve. The safety-type cylinder valve comprises a valve body, wherein the bottom of the valve body is connected with an overcurrent protector, which comprises a current limiter main body, a hollow current-limiting piston and a piston limiting spring; the current limiter main body is internally provided with a first cavity for gas transmission and a second cavity connected with the first cavity, and a conical sealing base is arranged at the connection part between the first cavity and the second cavity; the hollow current-limiting piston is arranged in the second cavity and can move in the second cavity in the axial direction; a conical sealing surface is formed at the upper end part of the current-limiting piston and matched with the sealing base to form sealing, an axial current-limiting hole is further formed at the upper end part of the current-limiting piston, and an overflow hole is also formed on the current-limiting piston in the radial direction; and the piston limiting spring is arranged between the current limiter main body and the current-limiting piston so as to exert an axial force on the current-limiting piston. The safety-type cylinder valve can prevent the risk of cylinder impact after the cylinder valve falls into a sudden failure.
Description
Technical field
The utility model relates to a kind of engineering part, relates 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.
The model utility content
The purpose of this utility model 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 utility model provides a kind of safety type cylinder valve, and 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 described in the utility model 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 described in the utility model 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 described in the utility model 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 described in the utility model is 0.7mm.
Further, the described filter of safety type cylinder valve described in the utility model is sintered filter.
Compare with existing cylinder valve, safety type cylinder valve described in the utility model 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, guaranteed gas cylinder user and staff's use safety on every side.
Description of drawings
Fig. 1 has shown that safety type cylinder valve described in the utility model 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 described in the utility model.
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 be described further safety type cylinder valve described in the utility model according to specific embodiment of the utility model and Figure of description, but this explanation does not consist of restriction of the present utility model.
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 embodiment of the utility model.Obviously the utility model 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 the disclosed content of the utility model and just associate, and all should belong to protection domain of the present utility model.
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 |
|---|---|---|---|
| CN 201220448806 CN202938018U (en) | 2012-09-05 | 2012-09-05 | Safety-type cylinder valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220448806 CN202938018U (en) | 2012-09-05 | 2012-09-05 | Safety-type cylinder valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202938018U true CN202938018U (en) | 2013-05-15 |
Family
ID=48322255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220448806 Withdrawn - After Issue CN202938018U (en) | 2012-09-05 | 2012-09-05 | Safety-type cylinder valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202938018U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162088A (en) * | 2012-09-05 | 2013-06-19 | 上海宝亚安全装备有限公司 | Safety type cylinder valve |
| CN112212022A (en) * | 2020-10-27 | 2021-01-12 | 杨波 | Gas cylinder valve |
-
2012
- 2012-09-05 CN CN 201220448806 patent/CN202938018U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162088A (en) * | 2012-09-05 | 2013-06-19 | 上海宝亚安全装备有限公司 | Safety type cylinder valve |
| CN103162088B (en) * | 2012-09-05 | 2014-09-10 | 上海宝亚安全装备有限公司 | Safety type cylinder valve |
| CN112212022A (en) * | 2020-10-27 | 2021-01-12 | 杨波 | Gas cylinder valve |
| CN112212022B (en) * | 2020-10-27 | 2022-08-02 | 科哲(上海)阀门有限公司 | Gas cylinder valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130515 Effective date of abandoning: 20140910 |
|
| RGAV | Abandon patent right to avoid regrant |