CN104405939A - Three-stage pressure reducer - Google Patents
Three-stage pressure reducer Download PDFInfo
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- CN104405939A CN104405939A CN201410649038.1A CN201410649038A CN104405939A CN 104405939 A CN104405939 A CN 104405939A CN 201410649038 A CN201410649038 A CN 201410649038A CN 104405939 A CN104405939 A CN 104405939A
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- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention provides a three-stage pressure reducer, which belongs to the technical field of a pipeline and solves the problems that the pressure change of the existing pressure reducer is great, and the air pressure is unstable. The three-stage pressure reducer comprises a valve body, an air inlet pipe, an air outlet pipe, a primary pressure reducing valve cover and a main pressure reducing valve cover, wherein the air inlet pipe, the air outlet pipe, the primary pressure reducing valve cover and the main pressure reducing valve are arranged on the valve body, a primary pressure reducing chamber is formed between the primary pressure reducing valve cover and the valve body, a primary valve and a main valve are arranged on the valve body, the inside of the primary pressure reducing valve cover is tightly butted against the primary valve, the air inlet pipe and the primary pressure reducing chamber are communicated or closed through the primary valve, a main pressure reducing chamber is formed between the main pressure reducing valve cover and the valve body, the main pressure reducing chamber is connected with the air outlet pipe, the inside of the main pressure reducing valve cover is tightly butted against the main valve, a secondary valve and a secondary pressure reducing valve cover are also arranged on the valve body, a secondary pressure reducing chamber is formed between the secondary pressure reducing valve cover and the valve body, primary air passages communicated to the secondary valve are respectively arranged inside the primary pressure reducing chamber, and a secondary air passage communicated to the main valve is arranged on the secondary pressure reducing chamber. The three-stage pressure reducer has the advantages that the air pressure is stable, and the structure is exquisite and ingenious.
Description
Technical field
The invention belongs to pipeline technical field, relate to a kind of decompressor, particularly a kind of three grades of decompressors.
Background technique
Reduction valve is by regulating, inlet pressure being reduced to the outlet pressure of a certain needs, and rely on the energy of medium itself, make the valve that outlet pressure keeps stable automatically.Be pressurized gas due to what export in gas cylinder, and the gas welding/equipment of cutting needs stable low-pressure gas, pressurized gas are adjusted to low-pressure gas by decompressor.
Chinese patent CN201339816Y discloses a kind of double-stage pressure reducer, comprises valve body, upper cover, lower cover, one-level valve, secondary valve; Described valve body and lower cover are connected to form one-level pressure reduction air chamber, described valve body and upper cover are connected to form second depressurized air chamber, described one-level valve is located at the suction port of one-level pressure reduction air chamber, described one-level pressure reduction air chamber is communicated with second depressurized air chamber by secondary valve, be provided with elastic film device in described one-level pressure reduction air chamber, one end of described elastic film device is provided with controlling device.
Above-mentioned double-stage pressure reducer only has two-stage decompression, in actual use, decompression progression is few, when high pressure reduces to low pressure, greatly, the low-pressure gas of output is unstable for the change of decompressor internal pressure, and when easily causing gas cutting/weldering, the breaking of workpiece/interface quality is bad, arrange multistage pressure change, topology layout is complicated.
Prior art is compared, and the present invention has following advantage:
1, these three grades of decompressors carry out three decompressions to pressurized gas, make pressurized gas be lowered into low-pressure gas step by step, and after decompression, pressurized gas reduce pressure further at secondary valve, and export after entering main valve decompression, the pressure range of decrease reduces, and stable gas pressure, fluctuates little.
2, one-level pressure relief valve lid and second depressurized valve gap and main decompression valve gap are separately positioned on valve body both sides, less installing space, distribution rationally, delicate structure.
3, one-level pressure relief valve lid and second depressurized valve gap symmetrical, rationally distributed, easy to process, use first time regulate pressure range after, do not need adjustment, formed constant pressure, easy to use.
4, the pressure that the cooperation playing diaphragm and spring conveniently can regulate main valve is set, the stable gas pressure that three grades of decompressors are exported, handwheel is set and rotates the pressure that adjusting screw rod can facilitate Regulation spring and bullet diaphragm, easy to operate.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose three grades of decompressors of a kind of stable gas pressure, delicate structure.
Object of the present invention realizes by following technical proposal: a kind of three grades of decompressors, comprise valve body, be arranged on the suction tude on valve body, steam outlet pipe, be arranged on the one-level pressure relief valve lid on valve body and main decompression valve gap respectively, one-level underpressure chamber is formed between described one-level pressure relief valve lid and valve body, described valve body is provided with one-level valve and main valve, push against in described one-level pressure relief valve lid to one-level valve, described suction tude and one-level underpressure chamber are communicated with by one-level valve or close, main underpressure chamber is formed between main decompression valve gap and valve body, main underpressure chamber is connected to steam outlet pipe, push against to main valve in described main decompression valve gap, it is characterized in that, described valve body is also provided with secondary valve and the second depressurized valve gap pushing against secondary valve, described second depressurized valve gap and valve body form second depressurized room, the primary airways being communicated to secondary valve is respectively offered in described one-level underpressure chamber, described second depressurized room offers the secondary air flue being communicated to main valve.
In above-mentioned one three grades of decompressors, described main decompression valve gap is arranged on the side of valve body, and described one-level pressure relief valve lid and second depressurized valve gap are arranged on the opposite side of valve body.
In above-mentioned one three grades of decompressors, described one-level pressure relief valve lid and second depressurized valve gap symmetrical.
In above-mentioned one three grades of decompressors, described valve body is also provided with high pressure gauge and low-pressure meter, and described high pressure gauge is communicated to one-level underpressure chamber, and described low-pressure meter is communicated to main underpressure chamber.
In above-mentioned one three grades of decompressors, described main decompression valve gap comprises handwheel, be arranged on the copper lid on valve body and be connected on handwheel and be screwed onto the adjusting screw rod that copper covers, spring and the bullet diaphragm being resisted against spring one end are installed in described copper lid, the other end of described spring is connected with adjusting screw rod, and described bullet diaphragm is resisted against on main valve.
In above-mentioned one three grades of decompressors, described copper covers and offers step hole, and smooth on described bullet diaphragm have packing ring, and the external diameter of described packing ring is equal with the external diameter playing diaphragm, described packing ring is arranged in step hole, and described copper lid to be threaded on valve body and to play diaphragm and pushes against packing ring and seal.
In above-mentioned one three grades of decompressors, described bullet diaphragm comprises shell fragment, the backing plate be flattened on shell fragment, run through and the jacking block of be connected shell fragment and backing plate, and described main valve is resisted against on jacking block, and described spring is pushed against on backing plate.
In above-mentioned one three grades of decompressors, the internal diameter of described packing ring is greater than the external diameter of backing plate.
Accompanying drawing explanation
Fig. 1 is the structural representation of one-level pressure relief valve lid and valve body in the present invention.
Fig. 2 is the structural representation of second depressurized valve gap in the present invention, main decompression valve gap and valve body.
Fig. 3 is the structure for amplifying schematic diagram at A place in the present invention.
Fig. 4 is plan structure schematic diagram of the present invention.
Fig. 5 of the present inventionly looks up structural representation.
In figure, 1, valve body; 11, from joint; 12, main joint; 13, one-level underpressure chamber; 14, second depressurized room; 15, main underpressure chamber; 16, primary airways; 17, secondary air flue; 2, one-level pressure relief valve lid; 21, one-level valve; 3, second depressurized valve gap; 31, secondary valve; 4, main decompression valve gap; 41, main valve; 42, handwheel; 43, adjusting screw rod; 44, Tong Gai; 45, spring; 46, diaphragm is played; 461, jacking block; 462, backing plate; 463, shell fragment; 47, packing ring; 5, suction tude; 6, steam outlet pipe; 7, low-pressure safety valve; 71, high-pressure safety valve; 8, low-pressure meter; 81, high pressure gauge; .
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figures 1 to 5, these three grades of decompressors, comprise valve body 1, be arranged on the suction tude 5 on valve body 1, steam outlet pipe 6, high pressure gauge 81, low-pressure meter 8, be arranged on the one-level pressure relief valve lid 2 on valve body 1 respectively, second depressurized valve gap 3 and main decompression valve gap 4, one-level underpressure chamber 13 is formed between one-level pressure relief valve lid 2 and valve body 1, second depressurized valve gap 3 and valve body 1 form second depressurized room 14, main underpressure chamber 15 is formed between main decompression valve gap 4 and valve body 1, one-level valve 21 has been pushed against in one-level pressure relief valve lid 2, second depressurized valve gap 3 has pushed against secondary valve 31, main valve 41 has been pushed against in main decompression valve gap 4, one-level underpressure chamber 13 controls both connection or closedown with suction tude 5 by the movement of one-level valve 21, main underpressure chamber 15 is connected to steam outlet pipe 6, the primary airways 16 being communicated to secondary valve 31 is respectively offered in one-level underpressure chamber 13, second depressurized room 14 offers the secondary air flue 17 being communicated to main valve 41, high pressure gauge 81 is communicated to one-level underpressure chamber 13, low-pressure meter 8 is communicated to main underpressure chamber 15, be arranged to cylindrical as preferred valve body 1, suction tude 5, steam outlet pipe 6, high pressure gauge 81 and low-pressure meter 8 are installed on arc surface, arc surface is also provided with high-pressure safety valve 71 and low-pressure safety valve 7, high-pressure safety valve 71 is connected to one-level underpressure chamber 13, low-pressure safety valve 7 is connected to main underpressure chamber 15, the ultimate pressure of valve body internal air pressure protected by high-pressure safety valve 71 and low-pressure safety valve 7, Overpressure of a safety valve gas is with regard to outside exits valve body 1, one-level pressure relief valve lid 2, second depressurized valve gap 3 and main decompression valve gap 4 are arranged in both ends of the surface.
One-level valve 21 is opened under the pressure effect of pressurized gas, pressurized gas enter to one-level underpressure chamber 13 along suction tude 5, first post-decompression pressurized gas flow into secondary valve 31 place through primary airways 16, secondary valve 31 is opened, second depressurized room 14 is flowed into after pressurized gas reduce pressure further, what second depressurized room 14 place existed is the gas of medium pressure, main valve 41 is flowed into further by secondary air flue 17, main valve 41 is regulated by the pressure on main decompression valve gap 4, control the pressure entering main underpressure chamber 15, the low-pressure gas that steam outlet pipe 6 output pressure making to be connected to main underpressure chamber 15 is stable, ensure to establish the stable of cushion gas, the workpiece quality of processing is good, adopt three grades of decompressions, the decompression progression effectively avoiding two stage pressure reducing is inadequate, the problem that the low-pressure gas exported is stable not, simultaneously, adopt more multistage decompression can cause complex structure again, the path of gas flow warp is long, gas is caused to circulate not smooth, adopt three grades of decompressions, the steady output of low-pressure gas can be ensured, can ensure that again the output of gas is smooth.
The main joint 12 of a ring is protruded in the side of valve body 1, main decompression valve gap 4 is arranged on the main joint 12 of valve body 1, inner space between main decompression valve gap 4 and main joint 12 forms main underpressure chamber 15, the opposite side of valve body 1 protrude two rings from joint 11, one-level pressure relief valve lid 2 and second depressurized valve gap 3 are arranged on from joint 11, one-level pressure relief valve lid 2 and second depressurized valve gap 3 and form one-level underpressure chamber 13 and second depressurized room 14 from the inner space between joint 11, one-level pressure relief valve lid 2 and second depressurized valve gap 3 symmetrical.
One-level pressure relief valve lid 2 and second depressurized valve gap 3 are separately positioned on the both sides of valve body 1 with main decompression valve gap 4, rationally distributed, one-level pressure relief valve lid 2 and second depressurized valve gap 3 are when elementary debugging, adjust the force value of the air pressure that one-level pressure relief valve lid 2 and second depressurized valve gap 3 are opened, one-level valve 21 and secondary valve 31 are opened automatically, thus be arranged in the same side, one-level pressure relief valve lid 2 and second depressurized valve gap 3 are symmetrical arranged and can make easy to process and layout is attractive in appearance; Main decompression valve gap 4 also needs the delivery pressure adjusting tracheae 6, thus in use needs frequent adjustment, thus Dan Chu side, is easy to operation.
As shown in Figures 2 and 3, main decompression valve gap 4 comprises handwheel 42, be arranged on copper lid on valve body 1 44 and be connected on handwheel 42 and the adjusting screw rod 43 be screwed onto on copper lid 44, spring 45 and the bullet diaphragm 46 being resisted against spring 45 one end are installed in copper lid 44, the other end of spring 45 is connected with adjusting screw rod 43, copper lid 44 offers step hole, smooth on bullet diaphragm 46 have packing ring 47, the external diameter of packing ring 47 is equal with the external diameter playing diaphragm 46, packing ring 47 is arranged in step hole, copper lid 44 to be threaded on valve body 1 and to play diaphragm 46 and pushes against packing ring 47 and seal, play diaphragm 46 to be resisted against on main valve 41.
Play diaphragm 46 to comprise shell fragment 463, the backing plate 462 be flattened on shell fragment 463, to run through and the jacking block 461 of be connected shell fragment 463 and backing plate 462, main valve 41 is resisted against on jacking block 461, spring 45 is pushed against on backing plate 462, and the internal diameter of packing ring 47 is greater than the external diameter of backing plate 462.
Handwheel 42 drives adjusting screw rod 43 to rotate, and spring 45 compresses and plays diaphragm 46 under the effect of adjusting screw rod 43, and the jacking block 461 played on diaphragm 46 pushes against main valve 41, controls the pressure that gas exports from main valve 41, plays the effect regulating pressure, easy to adjust; Arrange and play diaphragm 46 and packing ring 47, can effectively control to play the amount of deformation of diaphragm 46 and the position of deformation, air pressure adjustment is more convenient; Play diaphragm 46 and seal up main decompression valve gap 4 and valve body 1, low-pressure gas is exported by steam outlet pipe 6, the good sealing effect of jointing.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (8)
1. three grades of decompressors, comprise valve body, be arranged on the suction tude on valve body, steam outlet pipe, be arranged on the one-level pressure relief valve lid on valve body and main decompression valve gap respectively, one-level underpressure chamber is formed between described one-level pressure relief valve lid and valve body, described valve body is provided with one-level valve and main valve, push against in described one-level pressure relief valve lid to one-level valve, described suction tude and one-level underpressure chamber are communicated with by one-level valve or close, main underpressure chamber is formed between main decompression valve gap and valve body, main underpressure chamber is connected to steam outlet pipe, push against to main valve in described main decompression valve gap, it is characterized in that, described valve body is also provided with secondary valve and the second depressurized valve gap pushing against secondary valve, described second depressurized valve gap and valve body form second depressurized room, the primary airways being communicated to secondary valve is respectively offered in described one-level underpressure chamber, described second depressurized room offers the secondary air flue being communicated to main valve.
2. three grades of decompressors according to claim 1, is characterized in that, described main decompression valve gap is arranged on the side of valve body, and described one-level pressure relief valve lid and second depressurized valve gap are arranged on the opposite side of valve body.
3. three grades of decompressors according to claim 1 and 2, is characterized in that, described one-level pressure relief valve lid and second depressurized valve gap symmetrical.
4. three grades of decompressors according to claim 1 and 2, is characterized in that, described valve body is also provided with high pressure gauge and low-pressure meter, and described high pressure gauge is communicated to one-level underpressure chamber, and described low-pressure meter is communicated to main underpressure chamber.
5. three grades of decompressors according to claim 1 and 2, it is characterized in that, described main decompression valve gap comprises handwheel, be arranged on the copper lid on valve body and be connected on handwheel and be screwed onto the adjusting screw rod that copper covers, spring and the bullet diaphragm being resisted against spring one end are installed in described copper lid, the other end of described spring is connected with adjusting screw rod, and described bullet diaphragm is resisted against on main valve.
6. three grades of decompressors according to claim 5, it is characterized in that, described copper covers and offers step hole, smooth on described bullet diaphragm have packing ring, the external diameter of described packing ring is equal with the external diameter playing diaphragm, described packing ring is arranged in step hole, and described copper lid to be threaded on valve body and to play diaphragm and pushes against packing ring and seal.
7. three grades of decompressors according to claim 6, is characterized in that, described bullet diaphragm comprises shell fragment, the backing plate be flattened on shell fragment, run through and the jacking block of be connected shell fragment and backing plate, and described main valve is resisted against on jacking block, and described spring is pushed against on backing plate.
8. three grades of decompressors according to claim 7, is characterized in that, the internal diameter of described packing ring is greater than the external diameter of backing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410649038.1A CN104405939B (en) | 2014-11-14 | 2014-11-14 | A kind of three-level pressure reducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410649038.1A CN104405939B (en) | 2014-11-14 | 2014-11-14 | A kind of three-level pressure reducer |
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| CN104405939A true CN104405939A (en) | 2015-03-11 |
| CN104405939B CN104405939B (en) | 2017-09-29 |
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| CN201410649038.1A Active CN104405939B (en) | 2014-11-14 | 2014-11-14 | A kind of three-level pressure reducer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131334A (en) * | 2017-05-26 | 2017-09-05 | 张家港市鸿嘉数字科技有限公司 | A kind of effective carbon-dioxide pressure reducer |
| CN109723695A (en) * | 2019-03-08 | 2019-05-07 | 广东南曦液压机械有限公司 | A kind of extra-high pressure unloading valve |
| CN112797209A (en) * | 2021-01-28 | 2021-05-14 | 浙江元曜阀业有限公司 | Three-stage pressure reducing valve |
| CN113819285A (en) * | 2021-09-14 | 2021-12-21 | 上海猛轼流体机械有限公司 | Composite bipolar pressure reducing valve |
| CN115435123A (en) * | 2022-07-15 | 2022-12-06 | 宁波隆兴焊割科技股份有限公司 | High-pressure reducer with adjustable exhaust flow |
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| JP2000120895A (en) * | 1998-10-16 | 2000-04-28 | Nippon Walbro:Kk | Diaphragm type pressure reducing valve |
| CN2382918Y (en) * | 1999-08-06 | 2000-06-14 | 唐琳海 | Three stage directly function reversal pressure reducing valve for compressed natural gas automobile |
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| CN201339816Y (en) * | 2008-12-18 | 2009-11-04 | 宁波隆兴焊割科技股份有限公司 | Double-stage pressure reducer |
| CN203309258U (en) * | 2013-06-06 | 2013-11-27 | 重庆鼎辉汽车燃气***有限公司 | Secondary and tertiary pressure reducing devices of high-flow natural gas three-stage pressure reducer for vehicle |
| CN204226771U (en) * | 2014-11-14 | 2015-03-25 | 宁波隆兴焊割科技股份有限公司 | A kind of three grades of decompressors |
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000120895A (en) * | 1998-10-16 | 2000-04-28 | Nippon Walbro:Kk | Diaphragm type pressure reducing valve |
| CN2382918Y (en) * | 1999-08-06 | 2000-06-14 | 唐琳海 | Three stage directly function reversal pressure reducing valve for compressed natural gas automobile |
| CN201218343Y (en) * | 2007-09-19 | 2009-04-08 | 成都莱达机械电子有限公司 | Pressure-reducing regulator for compressed natural gas used in vehicle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131334A (en) * | 2017-05-26 | 2017-09-05 | 张家港市鸿嘉数字科技有限公司 | A kind of effective carbon-dioxide pressure reducer |
| CN109723695A (en) * | 2019-03-08 | 2019-05-07 | 广东南曦液压机械有限公司 | A kind of extra-high pressure unloading valve |
| CN109723695B (en) * | 2019-03-08 | 2023-10-20 | 广东南曦液压机械有限公司 | Ultrahigh pressure unloading valve |
| CN112797209A (en) * | 2021-01-28 | 2021-05-14 | 浙江元曜阀业有限公司 | Three-stage pressure reducing valve |
| CN113819285A (en) * | 2021-09-14 | 2021-12-21 | 上海猛轼流体机械有限公司 | Composite bipolar pressure reducing valve |
| CN115435123A (en) * | 2022-07-15 | 2022-12-06 | 宁波隆兴焊割科技股份有限公司 | High-pressure reducer with adjustable exhaust flow |
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| CN104405939B (en) | 2017-09-29 |
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