CN204329021U - A kind of flash-back arrestor - Google Patents
A kind of flash-back arrestor Download PDFInfo
- Publication number
- CN204329021U CN204329021U CN201420710647.9U CN201420710647U CN204329021U CN 204329021 U CN204329021 U CN 204329021U CN 201420710647 U CN201420710647 U CN 201420710647U CN 204329021 U CN204329021 U CN 204329021U
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- China
- Prior art keywords
- spring base
- valve
- check
- return
- pressing plate
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- Expired - Fee Related
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model relates to a kind of flash-back arrestor, comprise drive end bearing bracket, rear end cap, copper pipe, back-fire relief body and check (non-return) valve, the two ends of described copper pipe respectively with drive end bearing bracket, rear end cap connects, junction has packing ring A respectively, packing ring B, described back-fire relief body is cylindric, back-fire relief body two-port is closed by drive end bearing bracket and spring base respectively, described both ends of the spring is against on check (non-return) valve and spring base respectively, check (non-return) valve is made to seal gas access, described spring base there is resetting means, resetting means comprises push rod and pressing plate, push rod is connected with pressing plate is vertical, there is jogger hole at described spring base center, push rod is through jogger hole, pressing plate is positioned at outlet nozzle side, the utility model by having set up a resetting means on spring base, when there is tempering phenomenon, the reaction speed of resetting means is more Zao than spring, coordinate the elastic force effect of spring simultaneously, flash-back arrestor in the utility model is quick on the draw, safe and reliable.
Description
Technical field
The utility model relates to a kind of flash-back arrestor, particularly relates to a kind of flash-back arrestor be used on gas cutting equipment.
Background technology
The flash-back arrestor (also claiming flashback arrester) used in the market has two kinds, i.e. dry flashback arrestor and water-sealing back fire arrester.These two kinds of flash-back arrestor operation principles and structure different: water-sealing back fire arrester is when normally working, and acetylene enters from bottom air inlet, backs down check-valves, enters weldering (cutting) torch through cleaner from gas outlet.When flashing back, flame is from gas outlet tank switching, back down rubber membrane, make combustion flame escape into air from gas vent, combustion flame pressure closes check (non-return) valve on the other hand, cutting gas circuit, flame is made to enter acetylene gas generating device, in addition, the water in cylindrical shell has also blocked the path of flame, plays the effect of insurance.
Its major defect is the effect that the air-flow larger to combustion pressure does not have prevention, and then effectively can not stop tempering, and therefore, such flash-back arrestor now seldom has manufacturer in production; And the check (non-return) valve that its major defect of dry flashback arrestor is the flash-back arrestor inside of the type resets by the elastic force effect of spring, because spring works for a long time under alternate load effect, there is the possibility of spring failure, when spring failure, check (non-return) valve cannot effective sealing gas access, there is the risk being tempered to gas tank.
Utility model content
The utility model, in order to overcome deficiency of the prior art, provides a kind of check (non-return) valve reset speed fast, safe and reliable flash-back arrestor.
The utility model is achieved through the following technical solutions:
A kind of flash-back arrestor, comprise drive end bearing bracket, rear end cap, copper pipe, back-fire relief body and check (non-return) valve, the two ends of described copper pipe are threaded connection with drive end bearing bracket, rear end cap respectively, and junction has packing ring A, packing ring B respectively, to play sealing function, prevents gas leak; Described drive end bearing bracket has into valve, rear end cap has outlet nozzle; Described back-fire relief body is cylindric, what adopt is that 80-120 order stainless steel particle sintering is made, and back-fire relief body two-port is closed by drive end bearing bracket and spring base respectively, and described both ends of the spring is against on check (non-return) valve and spring base respectively, entering before valve place passes into gas, check (non-return) valve is made to seal gas access; Described spring base there is resetting means, resetting means comprises push rod and pressing plate, push rod is connected with pressing plate is vertical, spring base there is jogger hole, push rod on resetting means is through jogger hole, and be against on check (non-return) valve, pressing plate is positioned at outlet nozzle side, described check (non-return) valve there is ring washer, plays the effect of enhanced leaktightness.
Under normal operating operating mode, gas flows into from entering valve, under gas pressure, the check (non-return) valve sealing gas access is backed down, and move to gas vent side, simultaneously resetting means also by check (non-return) valve top to gas vent side, its extreme position of the pressing plate on resetting means is positioned at banking pin place, the effect of banking pin prevents pressing plate from crossing pore on spring base, avoids the outlet of pressing plate barrier gas; From the gas that check (non-return) valve flows into, flow into rear flank in back-fire relief body and, through the aperture on back-fire relief body, along the Cavity Flow that the external wall of back-fire relief and copper pipe inwall are formed, then flow through the pore on spring base, flow out from the outlet nozzle rear end cap.
When there is tempering phenomenon, outlet nozzle place gas pressure increases instantaneously, first pressure act on pressing plate, and promotion pressing plate and push rod move to side, gas access, under the effect of push rod, force check (non-return) valve to move to gas access, simultaneously, pressure inside back-fire relief body, also in increase, and enters valve side and forms positive differential pressure, under the elastic force effect of spring, check (non-return) valve seals gas access, stops gas to enter in flash-back arrestor; The flame of tempering channels to back-fire relief body place, fray-out of flame after back-fire relief body.
Compared with prior art, the beneficial effects of the utility model are: the utility model by having set up a resetting means on spring base, when there is tempering phenomenon, the reaction speed of resetting means is more Zao than spring, coordinate the elastic force effect of spring simultaneously, flash-back arrestor in the utility model is quick on the draw, safe and reliable.
Accompanying drawing explanation
Fig. 1 is sectional view of the present utility model;
Fig. 2 is partial schematic diagram of the present utility model.
In figure: 1, enter valve; 2, drive end bearing bracket; 3, packing ring A; 4, copper pipe; 5, packing ring B; 6, rear end cap; 7, check (non-return) valve; 7a, ring washer; 8, back-fire relief body; 9, spring; 10, resetting means; 10a, push rod; 10b, pressing plate; 11, spring base; 11a, pore; 11b, jogger hole; 12, outlet nozzle; 13, banking pin.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 2, Fig. 1 is structural representation of the present utility model, and Fig. 2 is partial schematic diagram of the present utility model.
Described a kind of flash-back arrestor, comprise drive end bearing bracket 2, rear end cap 6, copper pipe 4, back-fire relief body 8 and check (non-return) valve 7, the two ends of described copper pipe 4 are threaded connection with drive end bearing bracket 2, rear end cap 6 respectively, and junction has packing ring A3, packing ring B5 respectively, to play sealing function, prevent gas leak; Described drive end bearing bracket 2 has into valve 1, rear end cap 6 has outlet nozzle 12; Described back-fire relief body 8 is cylindric, what adopt is that 80-120 order stainless steel particle sintering is made, back-fire relief body 8 two-port is closed by drive end bearing bracket 2 and spring base 11 respectively, described spring 9 two ends are against on check (non-return) valve 7 and spring base 11 respectively, entering before valve 1 place passes into gas, check (non-return) valve 7 is made to seal gas access; Described spring base 11 there is resetting means 10, resetting means 10 comprises push rod 10a and pressing plate 10b, push rod 10a is connected with pressing plate 10b is vertical, spring base 11 there is jogger hole 11b, push rod 10a on resetting means 10 is through jogger hole 11b, and be against on check (non-return) valve 7, pressing plate 10b is positioned at outlet nozzle 12 side, described check (non-return) valve 7 there is ring washer 7a, plays the effect of enhanced leaktightness.
Under normal operating operating mode, gas flows into from entering valve 1, under gas pressure, the check (non-return) valve 7 sealing gas access is backed down, and move to gas vent side, resetting means 10 is also pushed up to gas vent side by check (non-return) valve 7 simultaneously, and its extreme position of the pressing plate 10b on resetting means 10 is positioned at banking pin 13 place, the effect of banking pin 13 prevents pressing plate 10b from crossing pore 11a on spring base 11, avoids the outlet of pressing plate 10b barrier gas; From the gas that check (non-return) valve 7 flows into, flow into rear flank in back-fire relief body 8 and, through the aperture on back-fire relief body 8, along the Cavity Flow that back-fire relief body 8 outer wall and copper pipe 4 inwall are formed, then flow through the pore 11a on spring base 11, flow out from the outlet nozzle 12 rear end cap 6.
When there is tempering phenomenon, outlet nozzle 12 place gas pressure increases instantaneously, first pressure act on pressing plate 10b, promotes pressing plate 10b and push rod 10a and move to side, gas access, force check (non-return) valve 7 to move to gas access under the effect of push rod 10a, simultaneously, pressure inside back-fire relief body 8, also in increase, and enters valve 1 side and forms positive differential pressure, under the elastic force effect of spring 9, check (non-return) valve 7 seals gas access, stops gas to enter in flash-back arrestor; The flame of tempering channels to back-fire relief body 8 place, fray-out of flame after back-fire relief body 8.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. a flash-back arrestor, comprise drive end bearing bracket (2), rear end cap (6), copper pipe (4), back-fire relief body (8) and check (non-return) valve (7), the two ends of described copper pipe (4) respectively with drive end bearing bracket (2), rear end cap (6) connects, junction has packing ring A (3) respectively, packing ring B (5), described drive end bearing bracket (2) is gas access, rear end cap (6) is gas vent, described back-fire relief body (8) is cylindric, back-fire relief body (8) two-port is closed by drive end bearing bracket (2) and spring base (11) respectively, described spring (9) two ends are against on check (non-return) valve (7) and spring base (11) respectively, check (non-return) valve (7) is made to seal gas access, it is characterized in that: described spring base (11) has resetting means (10), resetting means (10) comprises push rod (10a) and pressing plate (10b), push rod (10a) is connected with pressing plate (10b) is vertical, there is jogger hole (11b) at described spring base (11) center, push rod (10a) is through jogger hole (11b), pressing plate (10b) is positioned at outlet nozzle (12) side.
2. a kind of flash-back arrestor according to claim 1, it is characterized in that: upper limited location nail (13) of described spring base (11), the position of restriction pressing plate (10b), makes it be unlikely to the pore (11a) blocked on spring base (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420710647.9U CN204329021U (en) | 2014-11-13 | 2014-11-13 | A kind of flash-back arrestor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420710647.9U CN204329021U (en) | 2014-11-13 | 2014-11-13 | A kind of flash-back arrestor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204329021U true CN204329021U (en) | 2015-05-13 |
Family
ID=53165375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420710647.9U Expired - Fee Related CN204329021U (en) | 2014-11-13 | 2014-11-13 | A kind of flash-back arrestor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204329021U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941952A (en) * | 2015-05-28 | 2015-09-30 | 沪东中华造船(集团)有限公司 | Flashback arrestor maintaining method |
| CN105240856A (en) * | 2015-10-18 | 2016-01-13 | 桐城市丽琼金属制品有限公司 | Dry tempering flashback arrestor |
-
2014
- 2014-11-13 CN CN201420710647.9U patent/CN204329021U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941952A (en) * | 2015-05-28 | 2015-09-30 | 沪东中华造船(集团)有限公司 | Flashback arrestor maintaining method |
| CN105240856A (en) * | 2015-10-18 | 2016-01-13 | 桐城市丽琼金属制品有限公司 | Dry tempering flashback arrestor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20151113 |
|
| EXPY | Termination of patent right or utility model |