CN115435127A - Anti-backfire pressure reducer - Google Patents
Anti-backfire pressure reducer Download PDFInfo
- Publication number
- CN115435127A CN115435127A CN202210830261.0A CN202210830261A CN115435127A CN 115435127 A CN115435127 A CN 115435127A CN 202210830261 A CN202210830261 A CN 202210830261A CN 115435127 A CN115435127 A CN 115435127A
- Authority
- CN
- China
- Prior art keywords
- decompression chamber
- pressure reducer
- block
- base
- backfire
- Prior art date
- 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.)
- Pending
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 51
- 230000006837 decompression Effects 0.000 claims abstract description 59
- 230000000903 blocking effect Effects 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 abstract description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 14
- 239000001301 oxygen Substances 0.000 abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 abstract description 14
- 238000004200 deflagration Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gas Burners (AREA)
Abstract
The invention relates to the technical field of pressure reducers, and discloses an anti-backfire pressure reducer, which comprises: a housing having a first decompression chamber; the first joint is arranged on the shell and provided with a gas flow passage communicated with the first decompression chamber, and a check ring is arranged in the first joint; the plugging piece is arranged in the first joint and comprises a movable plugging block; the blocking block can be abutted against the check ring to block the gas flow passage. The invention has the advantages that when the flame flows back, the thrust generated by the flame deflagration can push the block, so that the block can be quickly abutted against the check ring to block the gas flow passage, thereby preventing the flame from flowing back to the oxygen tank and further ensuring the safety of workers.
Description
Technical Field
The invention relates to the technical field of pressure reducers, in particular to an anti-backfire pressure reducer.
Background
The pressure reducer is a device for reducing the pressure of the high-pressure oxygen stored in the oxygen cylinder to low-pressure oxygen required for gas welding. Because of the high pressure in the cylinder and the low pressure required for gas welding and gas cutting, a pressure reducer is required to reduce the high pressure gas stored in the cylinder to a low pressure gas and to ensure that the required working pressure remains stable throughout. In short, a pressure reducer is a regulating device that reduces high-pressure gas to low-pressure gas and keeps the pressure and flow rate of the output gas constant. At present, when the pressure reducer is closed, since the pressure in the decompression chamber of the pressure reducer gradually decreases, the flame extremely easily flows back into the decompression chamber of the pressure reducer, and then flows back into the oxygen tank, causing explosion.
Disclosure of Invention
The present invention has been made in view of the foregoing problems, and it is an object of the present invention to provide a flashback-preventing pressure reducer that can prevent a flame from flowing backward, ensuring the safety of workers.
To achieve the above object, the present invention provides a flashback-preventing pressure reducer, comprising:
a housing having a first decompression chamber;
the first joint is arranged on the shell and is provided with a gas flow passage communicated with the first decompression chamber, and a check ring is arranged in the gas flow passage;
the plugging piece is arranged on the first joint and comprises a movable plugging block; the blocking block can be abutted against the check ring to block the gas flow passage.
According to the anti-backfire pressure reducer, when gas flows from the first decompression chamber to the gas flow passage, the blocking block is separated from the check ring; when gas flows to the first decompression chamber from the gas flow passage, the blocking piece is abutted to the check ring.
According to the anti-backfire pressure reducer, the blocking piece further comprises a mounting seat and a first spring, and the mounting seat is arranged in the first joint; one end of the first spring is fixedly connected with the mounting seat, and the other end of the first spring is fixedly connected with the blocking block.
According to the anti-backfire pressure reducer, the shell comprises a base, a cover body, an elastic diaphragm, a valve and an adjusting piece, wherein the cover body is arranged on the base; the elastic membrane is arranged between the base and the cover body and surrounds the base to form the first decompression chamber, and the valve is arranged on the base; the adjusting piece is movably arranged on the cover body and can drive the elastic membrane to be abutted against the valve.
According to the anti-backfire pressure reducer, a second spring is arranged between the adjusting piece and the elastic diaphragm.
According to the anti-backfire pressure reducer, the adjusting piece is provided with the connecting support, the connecting support is provided with the protruding part, and the protruding part is inserted into the second spring.
According to the anti-backfire pressure reducer, the base is provided with the second decompression chamber, the base is provided with a communication hole for communicating the first decompression chamber with the second decompression chamber, and the communication hole is provided with an annular bulge; the valve is movably arranged in the second decompression chamber and can be abutted against the annular bulge.
According to the anti-backfire pressure reducer, a return spring is arranged between one end of the valve and the base, and a push rod is arranged at the other end of the valve; the ejector rod penetrates through the communicating hole and can be abutted to the elastic membrane.
According to the anti-backfire pressure reducer, the base is provided with an air inlet communicated with the second decompression chamber, the second decompression chamber is internally provided with a fire stopping pipe, and the fire stopping pipe is positioned at the air inlet.
According to the anti-backfire pressure reducer, the anti-backfire pressure reducer further comprises a second joint, the second joint is arranged at the air inlet, and a filter block is arranged in the second joint.
The invention has the following beneficial effects:
when the flame flows back, the thrust generated by the flame deflagration can push the block to quickly abut against the check ring, so that the gas flow passage is blocked, the flame is prevented from flowing back to the oxygen tank, and the safety of workers is ensured; when the flame flows back, the blocking block is under the thrust generated by flame deflagration and under the thrust action of the first spring, so that the time spent by the blocking block in abutting joint with the check ring can be shortened, and the flame is prevented from flowing into the first decompression chamber; the pressure reducer has a multiple anti-backfire structure, so that the anti-backfire capability of the pressure reducer can be improved, and flame is prevented from flowing back to the oxygen cylinder; when the elastic diaphragm is deformed, the second spring can enable the elastic diaphragm to generate larger deformation when being impacted, and the valve is ensured to be closed.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is an enlarged view of FIG. 2 at A
FIG. 4 is a schematic view of the construction of a first joint of the present invention; .
In the figure: 100. a housing; 110. a base; 111. a first decompression chamber; 112. a second decompression chamber; 113. a communicating hole; 114. an annular projection; 115. an air inlet; 116. a fire stopping pipe; 120. a cover body; 130. an elastic diaphragm; 131. a first rigid plate; 132. a second rigid plate; 140. a valve; 141. a return spring; 142. a top rod; 143. a seal member; 150. an adjustment member; 151. a second spring; 152. connecting a bracket; 153. a boss portion; 154. a connecting rod; 155. a handle; 200. a first joint; 210. a gas flow channel; 220. a check ring; 300. a blocking piece; 310. blocking; 320. a mounting base; 321. mounting holes; 330. a first spring; 400. a second joint; 410. and (7) a filtering block.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 4, a back-fire prevention pressure reducer is mainly installed at an air outlet of an oxygen tank, and includes a housing 100, a first joint 200, and a blocking piece 300. The casing 100 has a first decompression chamber 111; the first joint 200 is provided on the casing 100, and has a gas flow passage 210 communicating with the first decompression chamber 111, and a check ring 220 is provided in the gas flow passage 210; the blocking piece 300 is arranged on the first connector 200 and comprises a movable blocking piece 310; the blocking piece 310 may abut the check ring 220 to block the gas flow passage 210. It should be noted that when the flame flows back, the flame reacts with the oxygen in the pressure reducer to generate deflagration, and a large thrust is generated; when flame flows back, thrust generated by flame deflagration of the flame can push the block 310, so that the block 310 is quickly abutted against the check ring 220, the gas flow channel 210 is blocked, the flame is prevented from flowing back to the oxygen tank, and the safety of workers is ensured.
When gas flows from the first decompression chamber 111 to the gas flow passage 210, the block 310 is separated from the check ring 220, and the decompressor is in a normal operation state; when gas flows from the gas passage 210 to the first decompression chamber 111, that is, when flame is refluxed, the stopper 310 abuts against the check ring 220 to block the gas passage 210, thereby preventing the flame from being refluxed. Wherein, the first connector 200 is the output end of the pressure reducer, and by arranging the blocking piece 300 in the output end of the pressure reducer, when the flame backflow phenomenon occurs, the flame is stopped at the output end of the pressure reducer, which can prevent the flame from flowing into the first decompression chamber 111, and prevent the pressure reducer from being damaged. Preferably, the check ring 220 may be made of a material with good sealing performance, such as rubber or plastic, so as to prevent the flame from penetrating into the first decompression chamber 111 through the gap between the check ring 220 and the block 310.
The closure 300 further comprises a mounting seat 320 and a first spring 330, the mounting seat 320 being arranged in the first joint 200; one end of the first spring 330 is fixedly connected to the mounting base 320, and the other end is fixedly connected to the blocking piece 310. The first spring 330 can drive the blocking piece 310 to abut against the check ring 220, so as to block the gas flow passage 210, and when the pressure reducer is not used, the first spring 330 drives the blocking piece 310 to always abut against the check ring 220, so that external impurities can be prevented from entering the first decompression chamber 111. When the pressure reducer is in a normal operating state, that is, when gas flows from the first decompression chamber 111 to the gas channel 210, the gas in the first decompression chamber 111 needs to overcome the urging force of the spring to separate the blocking piece 310 from the check ring 220, so that the gas in the first decompression chamber 111 can be discharged; when the flame is returned, the block 310 receives the thrust generated by the explosion of the flame and also receives the thrust of the first spring 330, which can shorten the time taken for the block 310 to abut against the check ring 220 and prevent the flame from flowing into the first decompression chamber 111.
In this embodiment, the mounting base 320 is provided with a mounting hole 321, and one end of the first spring 330 is inserted into the mounting hole 321 and is fixedly connected with the mounting base 320; the installation hole 321 can prevent the first spring 330 from deviating, and ensure that the blocking piece 310 can timely block the gas channel 210.
The casing 100 comprises a base 110, a cover 120, an elastic membrane 130, a valve 140 and an adjusting piece 150, wherein the cover 120 is arranged on the base 110; the elastic membrane 130 is arranged between the base 110 and the cover 120, and surrounds the base 110 to form a first decompression chamber 111, and the valve 140 is arranged on the base 110; the adjusting member 150 is movably disposed on the cover 120 and drives the elastic membrane 130 to abut against the valve 140 to open the valve 140. Wherein, the elastic membrane 130 has a certain elasticity; when the plugging member 300 is not plugged in time, that is, when a part of flame flows into the first decompression chamber 111, the flame will detonate in the first decompression chamber 111, and the thrust generated by the detonation of the flame will drive the elastic diaphragm 130 to deform, so that the elastic diaphragm 130 is separated from the valve 140, and the valve 140 is rapidly closed, thereby achieving the purpose of preventing the flame from flowing back. The elastic membrane 130 can timely close the valve 140 when the plugging piece 300 is not plugged timely, so that further backflow of flame is avoided.
In this embodiment, the two end faces of the elastic diaphragm 130 are respectively provided with a first rigid plate 131 and a second rigid plate 132, and the adjusting member 150 drives the valve 140 to open by pushing the rigid plates on the elastic diaphragm 130, which enables the valve 140 to open more reliably.
A second spring 151 is disposed between the adjusting member 150 and the elastic diaphragm 130. When the elastic membrane 130 deforms, the elastic membrane 130 compresses the second spring 151, and the second spring 151 can enable the elastic membrane 130 to generate a larger deformation amount when being impacted, so as to ensure that the valve 140 is closed; meanwhile, the second spring 151 may provide a buffering force to prevent the elastic diaphragm 130 from being damaged.
The adjusting member 150 is provided with a coupling bracket 152, the coupling bracket 152 is provided with a boss 153, and the boss 153 is inserted into the second spring 151. The protrusion 153 may limit the position of the second spring 151, and prevent the second spring 151 from being biased. Preferably, the adjusting member 150 includes a connecting rod 154 and a handle 155, the connecting rod 154 is screwed with the cover 120, and the handle 155 is fixedly connected with the connecting rod 154.
The base 110 is provided with a second decompression chamber 112, a communication hole 113 for communicating the first decompression chamber 111 and the second decompression chamber 112 is arranged on the base 110, and an annular bulge 114 is arranged at the communication hole 113; the valve 140 is movably disposed in the second decompression chamber 112 and can abut against the annular projection 114 to close the communication hole 113. In operation, the high-pressure gas in the oxygen cylinder first enters the second decompression chamber 112, is decompressed for the first time, then enters the first decompression chamber 111 through the communication hole 113, is decompressed for the second time, and then is discharged from the gas flow passage 210. The high-pressure gas in the oxygen cylinder is discharged from the gas flow passage 210 after being decompressed in multiple stages, so that the gas outlet flow of the decompressor can be conveniently controlled.
In the present embodiment, the valve 140 is provided with a polygonal block (the polygonal block may be a nut or the like), corners of which are fitted to the inner wall of the second decompression chamber 112, and a gap is provided between the polygonal block and the inner wall of the second decompression chamber 112; when the valve 140 is separated from the annular projection 114, i.e., the communication hole 113 is opened, the gas can enter the first decompression chamber 111 through the gap and the communication hole 113 in order, and the secondary decompression is performed.
A return spring 141 is arranged between one end of the valve 140 and the base 110, and a push rod 142 is arranged at the other end; the stem 142 is inserted into the communication hole 113 and can abut against the elastic diaphragm 130. The return spring 141 can urge the valve 140 to abut against the annular protrusion 114, and when the pressure reducer is not used, the return spring 141 urges the valve 140 to always abut against the annular protrusion 114 to close the communication hole 113, so that the pressure reducer can be always in a closed state. Preferably, the valve 140 is provided with a sealing member 143, and the valve 140 is abutted to the annular protrusion 114 through the sealing member 143, so that the sealing effect is better.
An air inlet hole 115 communicating with the second decompression chamber 112 is provided on the base 110, a fire-stopping pipe 116 is provided in the second decompression chamber 112, and the fire-stopping pipe 116 is located at the air inlet hole 115. The fire-stopping tube 116 can isolate the flame when the valve 140 is not closed in time and the flame flows back to the second decompression chamber 112, so that the fire-stopping tube 116 can isolate the flame and prevent the flame from flowing back further.
The air inlet pipe further comprises a second joint 400, wherein the second joint 400 is arranged at the air inlet hole 115, and a filter block 410 is arranged in the second joint 400. The filter block 410 can filter impurities in the oxygen cylinder and reduce the accumulation of impurities in the pressure reducer.
The anti-backfire process of the pressure reducer is as follows: 1. when the flame reflows, the thrust generated by the explosion of the flame and the thrust of the first spring 330 can drive the blocking block 310 to be quickly abutted against the check ring 220, so as to block the gas flow channel 210, thereby achieving the purpose of preventing backfire; 2. when the blocking block 310 is not blocked in time, part of the flame flows back to the first decompression chamber 111, the flame detonates in the first decompression chamber 111, the generated thrust drives the elastic deformation, the elastic membrane 130 is separated from the ejector rod 142 of the valve 140, and the valve 140 is closed, so that the flame is prevented from further flowing back; 3. when the valve 140 is not closed in time, part of the flame will flow back into the second decompression chamber 112, and the flame-stopping tube 116 disposed at the air inlet hole 115 can isolate the flame and prevent the further flow back of the flame. The pressure reducer has a multiple anti-backfire structure, and the anti-backfire capability of the pressure reducer can be improved.
The scheme provides a backfire-proof pressure reducer which comprises a shell 100, a first connector 200 and a blocking piece 300. When the flame flows back, the thrust generated by the flame deflagration can push the block 310, so that the block 310 is rapidly abutted against the check ring 220, the gas flow passage 210 is blocked, the flame is prevented from flowing back to the oxygen tank, and the safety of workers is ensured.
The technical solutions of the present invention are explained in detail above with reference to the accompanying drawings, and the described embodiments are used to help understanding the idea of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
It should be noted that all directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. An anti-backfire pressure reducer, comprising:
a housing having a first decompression chamber;
the first joint is arranged on the shell and is provided with a gas flow passage communicated with the first decompression chamber, and a check ring is arranged in the gas flow passage;
the plugging piece is arranged on the first joint and comprises a movable plugging block; the blocking block can be abutted against the check ring to block the gas flow passage.
2. An anti-flashback pressure reducer according to claim 1, wherein the block separates from the check ring when gas flows from the first decompression chamber to the gas flow passage; when gas flows to the first decompression chamber from the gas flow channel, the blocking block is abutted to the check ring.
3. An anti-flashback pressure reducer according to claim 1, wherein the block piece further comprises a mount and a first spring, the mount being disposed in the first joint; one end of the first spring is fixedly connected with the mounting seat, and the other end of the first spring is fixedly connected with the blocking block.
4. The backfire pressure reducer as claimed in claim 1, wherein said housing comprises a base, a cover, an elastic diaphragm, a valve and an adjusting member, said cover being disposed on said base; the elastic diaphragm is arranged between the base and the cover body and surrounds the base to form the first decompression chamber, and the valve is arranged on the base; the adjusting piece is movably arranged on the cover body and can drive the elastic membrane to be abutted against the valve.
5. An anti-backfire pressure reducer as claimed in claim 4, wherein a second spring is arranged between said adjusting member and said elastic diaphragm.
6. An anti-backfire pressure reducer according to claim 5, wherein said adjusting member is provided with a connecting bracket, said connecting bracket is provided with a protruding portion, and said protruding portion is inserted into said second spring.
7. The backfire-proof pressure reducer as claimed in claim 4, wherein said base has a second decompression chamber, and a communication hole for communicating said first decompression chamber and said second decompression chamber is provided on said base, and an annular projection is provided at said communication hole; the valve is movably arranged in the second decompression chamber and can be abutted against the annular bulge.
8. The backfire-proof pressure reducer according to claim 7, wherein a return spring is arranged between one end of the valve and the base, and a mandril is arranged at the other end of the valve; the ejector rod penetrates through the communicating hole and can be abutted to the elastic membrane.
9. An anti-backfire pressure reducer according to claim 7, wherein said base is provided with an air inlet hole communicating with said second decompression chamber, and said second decompression chamber is provided with a fire-stopping pipe therein, said fire-stopping pipe being located at said air inlet hole.
10. The backfire-proof pressure reducer according to claim 9, further comprising a second joint, wherein said second joint is arranged at said air inlet, and a filter block is arranged in said second joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210830261.0A CN115435127A (en) | 2022-07-15 | 2022-07-15 | Anti-backfire pressure reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210830261.0A CN115435127A (en) | 2022-07-15 | 2022-07-15 | Anti-backfire pressure reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115435127A true CN115435127A (en) | 2022-12-06 |
Family
ID=84241230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210830261.0A Pending CN115435127A (en) | 2022-07-15 | 2022-07-15 | Anti-backfire pressure reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115435127A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1536769A (en) * | 1967-09-13 | 1968-08-16 | Ind G M B H & Co K G Fa | Central acetylene distribution facility |
| CN2187086Y (en) * | 1994-01-28 | 1995-01-11 | 常州市焊割工具厂 | Gas welding torch |
| CN2352840Y (en) * | 1998-09-28 | 1999-12-08 | 沈开桐 | Gaseous fuel range safety pressure-reducing valve |
| CN101614397A (en) * | 2009-07-27 | 2009-12-30 | 北京鹤华安吉电子技术研究所 | Combined mechanical pressure release anti-backfire device |
| CN102080825A (en) * | 2009-11-26 | 2011-06-01 | 宁波隆兴焊割科技股份有限公司 | Back-fire arrestor |
| CN202158350U (en) * | 2011-07-15 | 2012-03-07 | 车书秀 | Acetylene pressure reducer |
| CN207064752U (en) * | 2017-08-10 | 2018-03-02 | 宁波隆兴气割工具有限公司 | A kind of twin-stage argon decompressor |
| CN110206925A (en) * | 2019-06-27 | 2019-09-06 | 无锡明诚汽车部件有限公司 | A kind of respiratory pressure valve |
| CN214946648U (en) * | 2021-02-22 | 2021-11-30 | 宁波隆兴气割工具有限公司 | Gas pressure reducer |
-
2022
- 2022-07-15 CN CN202210830261.0A patent/CN115435127A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1536769A (en) * | 1967-09-13 | 1968-08-16 | Ind G M B H & Co K G Fa | Central acetylene distribution facility |
| CN2187086Y (en) * | 1994-01-28 | 1995-01-11 | 常州市焊割工具厂 | Gas welding torch |
| CN2352840Y (en) * | 1998-09-28 | 1999-12-08 | 沈开桐 | Gaseous fuel range safety pressure-reducing valve |
| CN101614397A (en) * | 2009-07-27 | 2009-12-30 | 北京鹤华安吉电子技术研究所 | Combined mechanical pressure release anti-backfire device |
| CN102080825A (en) * | 2009-11-26 | 2011-06-01 | 宁波隆兴焊割科技股份有限公司 | Back-fire arrestor |
| CN202158350U (en) * | 2011-07-15 | 2012-03-07 | 车书秀 | Acetylene pressure reducer |
| CN207064752U (en) * | 2017-08-10 | 2018-03-02 | 宁波隆兴气割工具有限公司 | A kind of twin-stage argon decompressor |
| CN110206925A (en) * | 2019-06-27 | 2019-09-06 | 无锡明诚汽车部件有限公司 | A kind of respiratory pressure valve |
| CN214946648U (en) * | 2021-02-22 | 2021-11-30 | 宁波隆兴气割工具有限公司 | Gas pressure reducer |
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