CN201228792Y - Pneumatic air pressure reducing valve - Google Patents
Pneumatic air pressure reducing valve Download PDFInfo
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- CN201228792Y CN201228792Y CNU2007200737189U CN200720073718U CN201228792Y CN 201228792 Y CN201228792 Y CN 201228792Y CN U2007200737189 U CNU2007200737189 U CN U2007200737189U CN 200720073718 U CN200720073718 U CN 200720073718U CN 201228792 Y CN201228792 Y CN 201228792Y
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Abstract
The utility model relates to a pneumatic air reducing valve belonging to the pneumatic control and transmission technical field, in particular to a pneumatic air reducing valve with larger caliber, also called a pneumatic reducing valve, an air reducing valve or a pressure regulating valve, which is characterized in that two-level combination with a cut-off overflow structure is adopted for a reducing and stabilizing structure, the first level is a small-caliber pressure regulating structure and the second level is a large-caliber pneumatic reducing valve structure, the first level is initiated by a lower operating force which supports to output air pressure controlling the second level- large-caliber reducing valve, as a hard regulating spring is not existed in the second level, influence to the reducing and stabilizing precision of the reducing valve due to the nonlinear deformation of the hard regulating spring can be basically eliminated, further, the difficulty of too large operating force resulted from manual and direction operation on the hard regulating spring in the large-caliber pneumatic air reducing valve and the shortage of low regulating precision due to larger nonlinear deformation of the spring can be solved, planar seal adopted in the cut-off overflow structure is favorable for eliminating pressure-relief lag, and the utility model is widely applied to gas source systems of various pneumatic tools, pneumatic instruments and pneumatic components which use compressed air as media.
Description
Technical field:
It is the pneumatic air reduction valve of working medium with pressurized air that the utility model relates to a kind of, it belongs to air pressure control and drive technology field, be widely used in the equipment pneumatic control system of machinery, oil, chemical industry, metallurgy, weaving, food, field of medicaments, compare with existing heavy caliber pneumatic air reduction valve, have decompression, precision of voltage regulation height, operate light advantage.
Background technique:
The pneumatic air reduction valve is used for pneumatic element, pneumatic tool, the air supply system of pneumatic instrument, its effect is that pressurized air is reduced pressure and the voltage stabilizing processing, at present existing heavy caliber pneumatic air reduction valve is to carry out balance with spring force and output pressure power that the thick cylindrical pressure adjusting spring of manual operation produces, export after making bleed pressure decompression and voltage stabilizing, this simple in structure, but the problem one that exists is that the pressure regulation precision is not high, though being the stressed and displacement relation of cylindrical pressure adjusting spring, reason has the linear ratio relation in theory, but in fact all there is the nonlinear deformation amount, the Spring Steel Wire diameter is big more, the nonlinear deformation amount is also just big more, therefore the thick pressure adjusting spring of heavy caliber makes the output pressure fluctuation bigger, pressure transient, the 2nd, rotate the pressure regulation handwheel with staff and need use very big power, operating difficulties, the 3rd, the elastic force of pressure adjusting spring is born on top during voltage regulation diaphragm work, the atmospheric pressure on the diaphragm is born in the bottom, because the pressure that top and bottom are subjected to is inequality, the yielding breakage of diaphragm, the 4th, the overflow unreasonable structure, existing overflow sealing configuration has two kinds, the one, hard sealing configuration (metallic seal), the 2nd, soft sealing configuration (rubber seal), hard sealing benefit pressure regulation sensitivity, shortcoming is that air leakage is big, the good seal performance of soft seal, but the release retardation phenomenon being arranged, resolve the above-mentioned deficiency that remains of heavy caliber pneumatic air reduction valve, is the purpose of this utility model.
Summary of the invention:
The purpose of this utility model is to provide a kind of and can overcomes above-mentioned shortcoming and have better pressure regulating performance; Operate light heavy caliber pneumatic air reduction valve, for achieving the above object, the skill that the utility model adopts
Art scheme one is secondary combined relief, structure of voltage regulation, the 2nd, and two diaphragm structures, the 3rd, cut-off type overflow structure, existing division is down:
1, secondary combined relief, structure of voltage regulation:
The top of first order structure is for being with discoidal pressure regulation handwheel, valve gap, pressure adjusting spring, the single-iris assembly, pressure adjusting spring place the single-iris assembly above, the built-in supported spring of pressure adjusting spring, form the complex spring structure, lean on the pressure regulation pad between pressure adjusting spring and the pressure regulation handwheel, spring seat transmits manual operation power to complex spring, spring composite structure and single-iris assembly all place within the valve gap, in the middle of the single-iris assembly is first order relief valve seat, the bottom is a first order diaphragm, on first order diaphragm, be pressing plate, first order nut is screwed on the first order relief valve seat, first order diaphragm and pressing plate are fixed together, the pressure regulation handwheel places the screw on the top of valve gap by its screw thread, the bottom of first order structure is a first order spool, little valve seat, first order balance spring, first order valve rod, these all place within the first order valve body, is furnished with first order overflow seal ring between first order valve rod and the first order valve body, first order spool top is furnished with first order seal spool pad, first order spool places among first order spool back pressure cavity and the first order air chamber, by the sealing of first order valve core seal ring, first order spool supports by first order balance spring, by the first order screw valve gap is fixed on the first order valve body, first order diaphragm is clipped between valve gap and the first order valve body, first order valve body is fixed tightly on the valve body of the second level with second level screw, the characteristics of first order structure are the air-flow paths that mutual connection is arranged: second level source of the gas passage is connected first order air chamber, first order spool back pressure cavity is connected first order output chamber, the first order is returned the feedback hole, first order chamber, in the middle of the first order relief valve seat is through hole, first order relief valve seat bottom configuration plane grommet type seal sheet;
The top of second level structure is intermediate, the middle part is middle spacer ring, the bottom is a second level valve body, intermediate, the center upper portion space of middle spacer ring and second level valve body is furnished with two diaphragm units, the bottom of second level valve body is furnished with second level spool, second level valve rod, big valve seat, the bottom of second level valve body is furnished with threaded tightening cover, be screwed in the screw of second level valve body by its screw thread, there is the tightening cover O-ring seals in the tightening cover outside, second level balance spring is arranged in the middle of the tightening cover, the top of second level spool is furnished with second level seal spool pad, the bottom is furnished with second level spool O-ring seals, the middle part of going up of second level valve body is furnished with second level overflow seal ring, and intermediate and first order valve body are furnished with intermediate seal ring and first order air source hole seal ring.
2, two diaphragm structures:
The centre of two diaphragm units is threaded second level relief valve seats, accompany the ring pad in the middle of the diaphragm of two ripple types, second level relief valve seat and ring pad inside all are provided with through hole and communicate with flow-off, second level relief valve seat is furnished with second level nut, with two second level diaphragms, the middle spacer ring and second relief valve seat form assembly, the second level gasket seal of plane shape is arranged at the bottom of second level relief valve seat, second level structural feature is that second level valve body is provided with input valve port and output valve port, the input valve port is divided into two the tunnel, one the road leads to second level spool chamber, one the road leads to second level source of the gas passage and the connection of first order air chamber, the output valve port also is divided into two the tunnel, one the tunnel enters output pipeline, and one the tunnel returns the feedback hole through the second level enters upper chamber, has formed and has returned feedback air pressure under two diaphragm units, on the output pressure of first order structure is arranged, thereby formed the decompression of second level air cavity type, the structure feature of voltage stabilizing.
3, cut-off type overflow structure:
Cut-off type overflow structure is to open and close sealing configuration by forming between the valve port that places second level gasket seal in the relief valve seat of the second level and second level valve rod front end, second level gasket seal includes the nitrile butadiene rubber diaphragm of nylon wire cloth interlayer for annular, second level valve rod front end valve port is a sealed-in nozzles, the overflow sealing configuration belongs to cut-off type, characteristics are that voltage stabilizing sealing displacement is little, and dirt exclusion capabilities is strong, the sensitivity of boosting, step-down is quick, does not have obvious release retardation phenomenon.
The utility model effect compared with prior art is:
1, first order structure adopts small-bore manual voltage regulation structure, second level structure adopts the Pneumatic-control type pressure adjusting structure, small-bore pressure adjusting spring is less, the spring nonlinear deformation is also little, the pressure regulation precision is better, manually light, with first order output pressure control second level pressure adjusting structure, avoided the non-linear influence of distortion that brings with strong pressure adjusting spring to the pressure regulation precision, and the pressure adjusting spring of existing one-level formula heavy caliber pneumatic air reduction valve is bigger to the influence of decompression voltage regulation performance, this secondary structure not only reduces pressure, voltage regulation performance is good, and operates light.
2, almost equal atmospheric pressure is all born in two diaphragm unit top and bottom, two diaphragm therebetween band pads, diaphragm is cracky not, and bear the pressure adjusting spring single force above the existing single-iris structure, and to bear uniform air pressure below to make a concerted effort, it is unbalanced that pressure is born in the diaphragm top and bottom, particularly outstanding in the heavy caliber structure, the yielding breakage of diaphragm, this twin-stage diaphragm is the convolution diaphragm of band nylon wire interlayer, intensity height; Displacement is big, is applicable to the big flow decompression of heavy caliber structure of voltage regulation.
3, overflow structure has two kinds usually: a kind of is soft sealing overflow structure; Another kind is the hard sealing configuration, and the soft structures tightness is better, is pressed with retardation phenomenon but unload, hard structure, the overflow sealing is a metal mold, the pressure regulation sensitivity, exist but have to leak, planarized structure is adopted in overflow sealing of the present utility model, belongs to soft sealing, but owing to adopted plane cut-off type sealing configuration, the sealing displacement is little, push rod leaves gasket seal fast during overflow, and release is quick, no retardation phenomenon.
4, the utility model secondary fabricated structure, the first order is universal small-bore structure of relief pressure valve, the second level is air pressure remote control type structure of relief pressure valve, this structure lid that can get on to break off the base on the basis of original structure of relief pressure valve, combine with the loam cake that removes the remote control type reduction valve, need not change main structure and just can make traditional heavy caliber reduction valve upgrade to the light precise pneumatic air reducing valve of operation.
Description of drawings:
Fig. 1: be the utility model internal structure schematic representation
Fig. 2: be existing pneumatic air reduction valve internal structure schematic representation
Fig. 3: be the utility model overflow structural representation
Embodiment:
As shown in Figure 1, bleed pressure (once pressing) enters from input valve port 57, and one the tunnel enters second level spool chamber 60, and another road enters first order air chamber 46 by second level source of the gas passage 48, according to the pressure nominal value rotation pressure regulation handwheel 28 of user's needs; Regulate the pressure of pressure adjusting spring 26, the pressure tabular value that makes the secondary of output valve port 9 press rating value and secondary to press is consistent, promptly finishes the output setting pressure, operate very light, below in detail decomposition reach and reduce pressure and the process of voltage stabilizing function:
Rotate pressure regulation handwheel 28, compression pressure adjusting spring 26, the elastic force of pressure adjusting spring orders about single-iris assembly 37 and moves down, pressing plate 35 in the single-iris assembly of first order structure, first order diaphragm 36, first order relief valve seat 32 are fastening by first order nut 33, first order relief valve seat 32 built-in first order gasket seals 34, after single-iris assembly 37 stressed moving down, first order valve rod 39 and the first order spool 18 that links together with valve rod also move down synchronously, first order spool is opened, and the pressurized air in the first order air chamber 46 just enters first order output chamber 20; The first order is returned feedback hole 21 and first order chamber 22, formation air pressure is made a concerted effort below single-iris assembly 37, upwards air pressure makes a concerted effort to compare with the elastic force of downward pressure adjusting spring 26, make a concerted effort greater than downward pressure adjusting spring power as the air pressure that makes progress, first order valve rod 39 upwards moves under the elastic force effect of first order balance spring 42 together with first order spool 18, aperture gap between first order spool and the little valve seat 40 reduces, the flow that flows in the first order output chamber 20 reduces, atmospheric pressure also decreases, as making a concerted effort of making progress less than downward pressure adjusting spring power, then first order spool aperture increases, the flow that flows into first order output chamber increases, atmospheric pressure also increases, constantly carry out transient equiliblium, when reaching transient equiliblium, the top of first order valve rod 39 and first order gasket seal 34 are in sealing state like this, no air pressure overflow in the first order relief valve seat 32 has promptly realized the decompression and the voltage stabilizing function of first order structure.This pressure arrives upper chamber 14 from first order output chamber 20 through first order output pore 19, air pressure forms downward air pressure and makes a concerted effort on two diaphragm units 55, middle spacer ring 50 in two diaphragm units, ring pad 51, second level diaphragm 52, second level relief valve seat 53 is tightened to assembly by second level nut 49, second level gasket seal 54 is installed in the second level relief valve seat 53, acting on two diaphragm unit 55 downward air pressure makes a concerted effort to order about second level valve rod 59 and moves down together with second level spool 6, the second level sealing gasket 7 that is built in the spool of the second level leaves big valve seat 8, be that second level spool 6 has had aperture (gap), gas in the second level spool chamber 60 just flows into output valve port 9, return feedback hole 10 simultaneously through the second level and flow into lower chambers 11, the upper and lower cavity of at this moment two diaphragm units is indoor all air pressure, the air pressure of upper and lower cavity all forms on diaphragm makes a concerted effort, and epicoele air pressure is specified setting pressure, the aperture size of second level spool 6 is by it and automatic setting, as flow into output valve port 9 pressure greater than setting pressure, be that epicoele air pressure makes a concerted effort to make a concerted effort less than cavity of resorption air pressure, the aperture of second level spool reduces automatically, the flow and the pressure that flow into delivery outlet reduce synchronously, following cavity pressure equals upper chamber's pressure, the setting value that promptly meets pressure adjusting spring, the aperture that at this moment the second corresponding spool has also just been arranged, it is stable that the pneumatic air reduction valve has just reached dynamic balancing, promptly be in decompression and steady state, if the pressure of upper chamber does not meet setting value, will readjust 26 compressive force of pressure adjusting spring this moment, whether reach setup pressure value, can see the pressure gauge show value of output valve port.The aperture size of the first order or second level spool depends on and acts on making a concerted effort up and down on the first order diaphragm 36 in a word, go up and make a concerted effort greater than making a concerted effort down, the spool aperture increases, its flow and pressure increase, less than making a concerted effort down, the spool aperture reduces, its flow and pressure reduce, when making a concerted effort to equate up and down, promptly reach dynamic balance state, this moment, the pressure of output was set point pressure, reached transient equiliblium, but this transient equiliblium is of short duration, when delivery outlet 9 one has had consumption gas, first order diaphragm 36, the bottom air pressure of second level diaphragm 52 makes a concerted effort to reduce, the making a concerted effort greater than the bottom with joint efforts of top, first order spool, the aperture of second level spool increases thereupon, and output flow and pressure increase synchronously, when making a concerted effort up and down to equate again, reached new transient equiliblium again, the working principle of first order structure and second level structure valve is in a word: carry out transient equiliblium again and again around setting pressure; Make it to reach the purpose of decompression and voltage stabilizing, setting pressure is to realize with the pressure regulation handwheel 28 of the first order, operates light.The pneumatic air reduction valve in use is higher than setting pressure as the pressure that the output valve port occurs, cut-off type overflow structure 62 is had an effect, as shown in Figure 3, this moment, lower chambers 11 air pressure were made a concerted effort greater than upper chamber 14, move second level relief valve seat 53 on two diaphragm units 55 and leave second level valve rod 59, the Pneumatic pipe cleaner that is higher than definite value is crossed second level overflow hole and is put into atmosphere from flow-off 12, makes air pressure get back to setting value, reaches the voltage stabilizing state again.If reduce setting pressure or inactive pneumatic air reduction valve, cut-off type overflow this moment structure 62 is had an effect too, pressure regulation handwheel 28 reverses this moment, reduce or decontrol the elastic force of pressure adjusting spring 26, first order chamber 22, the first order return in feedback hole 21, first order output chamber 20, first order output pore 19, the upper chamber 14 unnecessary air pressure just automatically the aperture first order flow-off 24 from first order relief valve seat 32 put into atmosphere.This moment, upper chamber's pressure lowered, move on two diaphragm units 55, second level relief valve seat 53 is opened, be higher than the definite value pressure by air pressure in the lower chambers 11 and make second level overflow hole 13 from second level relief valve seat 53, enter atmosphere through flow-off 12, thereby reach the purpose that reduces setting pressure or inactive release.
Among Fig. 1:
1, second level structure 42, first order balancing spring
2, tightening cover 43, first order valve core seal ring
3, second level balancing spring 44, first order valve body
4, tightening cover O-ring seals 45, second level screw
5, second level spool O-ring seals 46, first order air chamber
6, second level spool 47, first order air source hole seal ring
7, second level seal spool pad 48, second level source of the gas passage
8, big valve seat 49, second level nut
9, output valve port 50, middle spacer ring
10, feedback hole 51, ring pad are returned in the second level
11, lower chambers 52, second level diaphragm
12, flow-off 53, second level relief valve seat
13, second level overflow hole 54, second level gasket seal
14, upper chamber 55, two diaphragm unit
15, intermediate seal ring 56, second level overflow seal ring
16, intermediate 57, input valve port
17, first order spool back pressure cavity 58, second level valve body
18, first order spool 59, second level valve rod
19, first order output pore 60, second level spool chamber
20, first order output chamber 61, second level spool are pressed back of the body chamber
21, the first order is returned feedback hole 62, cut-off type overflow structure
22, first order chamber
23, first order screw explanation:
24, first order flow-off 62 is formed by 53,54,59,13,12
25, spring seat
26, pressure adjusting spring
27, supported spring
28, pressure regulation handwheel
29, first order structure
30, pressure regulation pad
31, valve gap
32, first order relief valve seat
33, first order nut
34, first order gasket seal
35, pressing plate
36, first order diaphragm
37, single-iris assembly
38, first order overflow seal ring
39, first order valve rod
40, little valve seat
41, first order seal spool pad
Claims (4)
1, a kind of pneumatic air reduction valve, be the secondary fabricated structure and have cut-off type overflow structure (62), first order structure (29) is small-bore pressure adjusting structure, second level structure is a heavy caliber gas control pressure reduction structure, on the top of the first order is pressure regulation handwheel (28), pressure regulation pad (30), pressure adjusting spring (26), supported spring (27), spring seat (25), single-iris assembly (37), they are all within valve gap (31), the built-in supported spring of spring seat (25) (27), the outside rests on the pressure adjusting spring, pressure regulation handwheel (28) is installed among the screw of valve gap (31) by its screw thread, pressure regulation handwheel (28) is being pressed pressure adjusting spring (26) and supported spring (27), at the middle part of first order structure (29) is first order valve rod (39), the bottom is little valve seat (40), first order spool (18), first order balance spring (42), they all are positioned within the first order valve body (44), first order spool (18) top is furnished with first order seal spool pad (41), the centre is connected with first order valve rod (39), the valve rod center has aperture that first order spool back pressure cavity (17) and first order output chamber (20) are communicated, the outer shroud mortise of first order spool (18) is furnished with first order valve core seal ring (43), the outer end is supported by first order balance spring (42), valve gap (31) is connected with first order screw (23) with first order valve body (44), on the top of second level structure is intermediate (16) and middle spacer ring (50), are furnished with two diaphragm units (55) between the two, the bottom is second level valve body (58), is furnished with second level spool (6) in it, second level valve rod (59), big valve seat (8), second level balance spring (3), second level seal spool pad (7), tightening cover (2), second level spool (6) is furnished with second level spool O-ring seals (5), tightening cover (2) is furnished with tightening cover 0 shape seal ring (4), tightening cover (2) is fixed in the screw of second level valve body (58) by the screw thread of self, first order valve body (44), intermediate (16) and two diaphragm unit are fixed together by the second level screw (45) that is screwed into second level valve body (58), it is characterized in that: there is source of the gas input valve port (57) in the left side of second level valve body (58), go up and communicate with second level source of the gas passage (48) and first order air chamber (46), communicate with second level spool chamber (60) down, there is the output valve port (9) of source of the gas on the right side of second level valve body (58), go up to return and present hole (10) and lower chambers (11) communicates with the second level, the bottom communicates with first order spool back pressure (61) by aperture in the middle of the second level valve rod (59), and the top first order chamber (22) of first order valve body (44) returns feedback hole (21) by the first order and communicates with first order output pore (19) and upper chamber (14).
2, according to the described a kind of pneumatic air reduction valve of claim (1), it is characterized in that: two diaphragm units (55) are by middle spacer ring (50), ring pad (51), second level diaphragm (52), second level relief valve seat (53), second level gasket seal (54) is combined, lean on second level nut (49) two second level diaphragm (52) up and down, ring pad (51), second level relief valve seat (53) is tightened to one, second level relief valve seat (53) is gone to the bottom and is provided with second level gasket seal, the flow-off (12) that the centre is provided with second level overflow hole (13) and communicates with it, second level diaphragm is the convolution diaphragm of intermediate course nylon wire.
3, a kind of pneumatic air reduction valve according to claim 1, it is characterized in that: the centre of single-iris assembly (37) is the first order diaphragm (36) of the circular band of a slice nylon wire laminated rubber material, it on it round metal dish type pressing plate (35), in its centre is the first order relief valve seat (32) of band endoporus, by first order nut (33) with pressing plate (35), first order diaphragm (36) is tightened to one, be equipped with narrow meshed first order gasket seal (34) in the endoporus of first order relief valve seat (32), middle aperture and first order flow-off (24) connect.
4, a kind of pneumatic air reduction valve according to claim 1, it is characterized in that: described cut-off type overflow structure (62) is to open and close sealing configuration by placing to form between interior second level gasket seal (54) of second level relief valve seat (53) and second level valve rod (59) the front end valve port, second level gasket seal (54) includes the elastomer diaphragm of interlayer for ring, and the top valve port of second level valve rod (59) is the nozzle with the sealing of being beneficial to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200737189U CN201228792Y (en) | 2007-08-16 | 2007-08-16 | Pneumatic air pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200737189U CN201228792Y (en) | 2007-08-16 | 2007-08-16 | Pneumatic air pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201228792Y true CN201228792Y (en) | 2009-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200737189U Expired - Fee Related CN201228792Y (en) | 2007-08-16 | 2007-08-16 | Pneumatic air pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201228792Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943282A (en) * | 2010-08-13 | 2011-01-12 | 陆桂义 | Equivalence self-control given instrument |
| CN102086949A (en) * | 2010-12-23 | 2011-06-08 | 陆桂义 | Intelligent exhaust device for pneumatic off valve execution mechanism |
| CN102619996A (en) * | 2012-04-25 | 2012-08-01 | 上海东震冶金工程技术有限公司 | Double-diaphragm two-stage reduced pressure oxygen regulating valve |
| CN103672060A (en) * | 2013-12-17 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Pneumatic reducing valve with overflow function |
| CN103672074A (en) * | 2013-12-17 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Pneumatic reducing value with diaphragm member and valve element |
| CN103672080A (en) * | 2013-12-17 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Pneumatic reducing valve with resetting device |
| CN104100748A (en) * | 2014-06-13 | 2014-10-15 | 苏州固基电子科技有限公司 | Pressure control valve |
| CN105673898A (en) * | 2016-04-01 | 2016-06-15 | 成都科盛石油科技有限公司 | Pressure-dropping main valve capable of improving outlet gas pressure regulating precision |
| CN114033880A (en) * | 2021-11-04 | 2022-02-11 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen pressure reducing valve |
| CN115655558A (en) * | 2022-12-28 | 2023-01-31 | 四川新川航空仪器有限责任公司 | Diaphragm piece for diaphragm type pressure signal device, pressure signal device and diaphragm damage detection method |
| CN117287541A (en) * | 2023-11-24 | 2023-12-26 | 科讯工业制造(深圳)有限公司 | Adjustable pressure stabilizing valve, assembling method thereof and semiconductor manufacturing equipment |
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2007
- 2007-08-16 CN CNU2007200737189U patent/CN201228792Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943282A (en) * | 2010-08-13 | 2011-01-12 | 陆桂义 | Equivalence self-control given instrument |
| CN102086949A (en) * | 2010-12-23 | 2011-06-08 | 陆桂义 | Intelligent exhaust device for pneumatic off valve execution mechanism |
| CN102619996A (en) * | 2012-04-25 | 2012-08-01 | 上海东震冶金工程技术有限公司 | Double-diaphragm two-stage reduced pressure oxygen regulating valve |
| CN102619996B (en) * | 2012-04-25 | 2013-08-07 | 上海东震冶金工程技术有限公司 | Double-diaphragm two-stage reduced pressure oxygen regulating valve |
| CN103672080A (en) * | 2013-12-17 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Pneumatic reducing valve with resetting device |
| CN103672074A (en) * | 2013-12-17 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Pneumatic reducing value with diaphragm member and valve element |
| CN103672060A (en) * | 2013-12-17 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Pneumatic reducing valve with overflow function |
| CN104100748A (en) * | 2014-06-13 | 2014-10-15 | 苏州固基电子科技有限公司 | Pressure control valve |
| CN105673898A (en) * | 2016-04-01 | 2016-06-15 | 成都科盛石油科技有限公司 | Pressure-dropping main valve capable of improving outlet gas pressure regulating precision |
| CN114033880A (en) * | 2021-11-04 | 2022-02-11 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen pressure reducing valve |
| CN114033880B (en) * | 2021-11-04 | 2024-02-09 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen pressure reducing valve |
| CN115655558A (en) * | 2022-12-28 | 2023-01-31 | 四川新川航空仪器有限责任公司 | Diaphragm piece for diaphragm type pressure signal device, pressure signal device and diaphragm damage detection method |
| CN115655558B (en) * | 2022-12-28 | 2023-04-11 | 四川新川航空仪器有限责任公司 | Diaphragm piece for diaphragm type pressure signal device, pressure signal device and diaphragm damage detection method |
| CN117287541A (en) * | 2023-11-24 | 2023-12-26 | 科讯工业制造(深圳)有限公司 | Adjustable pressure stabilizing valve, assembling method thereof and semiconductor manufacturing equipment |
| CN117287541B (en) * | 2023-11-24 | 2024-02-13 | 科讯工业制造(深圳)有限公司 | Adjustable pressure stabilizing valve, assembling method thereof and semiconductor manufacturing equipment |
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