CN102678994B - Automatic decompression voltage and current stabilizer - Google Patents
Automatic decompression voltage and current stabilizer Download PDFInfo
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- CN102678994B CN102678994B CN201210157189.6A CN201210157189A CN102678994B CN 102678994 B CN102678994 B CN 102678994B CN 201210157189 A CN201210157189 A CN 201210157189A CN 102678994 B CN102678994 B CN 102678994B
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Abstract
The invention belongs to the technical field of hydraulic transmission and discloses a novel automatic decompression voltage and current stabilizer, wherein a liquid inlet and a liquid outlet are arranged on the side wall of a shell, an upper end cover and a lower end cover are respectively connected on the upper end and the lower end of the shell, a valve seat is arranged at the middle part of the inner cavity of the shell, a valve rod component is inserted in the valve seat, the upper and lower ends of the valve rod component respectively stretch out from the upper and lower ends of the valve seat, the valve rod component stretching out from the upper end of the valve seat divides the inner cavity of the shell into an upper cavity and a lower cavity, which are not communicated with each other, the upper part of the valve rod component is in slide and seal fit with the upper opening of the valve seat, a pressure regulating device is arranged between the valve rod component stretching out from the upper end of the valve seat and the upper end cover, a valve core matched with the pressure regulating device and the valve seat for controlling the liquid pressure and flow rate in the shell is arranged on the valve rod component stretching out from the lower end of the valve seat, the liquid inlet is communicated with the inner cavity of the valve seat, and the liquid outlet is communicated with the lower cavity of the shell. The novel automatic decompression voltage and current stabilizer disclosed by the invention saves energy and water and has good decompression voltage and current stabilization effects, so that the novel automatic decompression voltage and current stabilizer is suitable for such fields as toilet bowl without a water tank.
Description
Technical field:
The invention belongs to hydraulic transmission technology field, refer in particular to a kind of have reduce outlet end pressure, steady pressure, regime flow, degree of regulation high, can adapt to high low pressure working environment, outlet end pressure surge is little and changes in flow rate is little new type auto pressure-reduced and-regulated current stabilizer.
Background technique:
The effect of common valve is to be to open and close fluid line, and it is normally controlled by the aperture of regulating spool the control of flow.But in actual use, the pressure of valve inlet end is unsettled, thereby its flow is also unstable, and, in most occasions, the hydrodynamic pressure of valve inlet end in other words the hydrodynamic pressure in fluid supply tube road conventionally higher inconvenience directly use, and the delivery pressure of common valve outlet end is conventionally directly related with flow, specifically, flow greatly decompression is little, delivery pressure is large, otherwise little.Therefore, common valve cannot meet the requirement of some special occasions.
Reduction valve is a kind of device that is specifically designed to automatic reduction working pressure of pipeline, it can be reduced to the higher fluid pressure (inlet pressure) in pipeline before valve after a certain valve required fluid pressure (outlet pressure) in pipeline as required, and relies on the energy of the medium (being mainly water) of transmission itself to control with the adjusting of regulating system to make downstream pressure automatically keep stablizing.From hydromechanical viewpoint, reduction valve is a throttle element that local resistance can change, by changing orifice size, the kinetic energy of flow velocity and fluid is changed, cause the different pressure losses, thereby reach the object of decompression, and rely on the adjusting of controlling with regulating system, fluctuation and the spring force of downstream pressure are balanced each other, make downstream pressure keep constant in certain margin of error.Existing reduction valve exists following deficiency: degree of regulation is lower, adapts to occasion narrower (generally just working under high pressure or environment under low pressure).And have high pressure normal operation, low pressure cannot be opened, low pressure normal operation, high pressure relief weak effect, outlet pressure fluctuation is large, spool vibration is large, the defect such as large, the instability of flow of noise in working procedure.
Summary of the invention:
The object of this invention is to provide a kind of have reduce outlet end pressure, steady pressure, regime flow, degree of regulation high, can adapt to high low pressure working environment, outlet end pressure surge is little and changes in flow rate is little new type auto pressure-reduced and-regulated current stabilizer.
The present invention is achieved in that
New type auto pressure-reduced and-regulated current stabilizer, on the sidewall of housing, offer liquid entering hole and liquid outlet, housing upper, lower end is connected with respectively, lower end cap, the middle part of housing inner chamber is provided with valve seat, between the inwall of housing and the outer wall of valve seat, be provided with gap, in valve seat, be equipped with valve rod assembly, valve rod assembly upper, the upper of valve seat stretched out respectively in lower end, lower end, the valve rod assembly that stretches out valve seat upper end by housing inner chamber cut apart form two disconnected on, lower chamber, the top of valve rod assembly and the upper opening of valve seat slide and are sealed and matched, be provided with pressure regulator stretching out between the valve rod assembly of valve seat upper end and upper end cap, stretch out to be provided with on the valve rod assembly of valve seat lower end and coordinate the fluid pressure controlled in housing and the spool of flow with pressure regulator and valve seat, liquid entering hole is communicated with the inner chamber of valve seat, liquid outlet is communicated with the lower chamber of housing.
In above-mentioned valve seat, being equipped with valve rod assembly is: the middle part of valve seat is equipped with valve rod, between the inwall of valve seat and the outer wall of valve rod, be provided with gap, the top of valve rod is stretched out the upper end of valve seat and is installed with the piston coordinating with housing seal, the necking part of piston bottom stretches in the opening on valve seat top and with valve base inner wall and slides and be sealed and matched, the upper surface of piston is provided with the rope mother on the top that is screwed onto valve rod, piston is cut apart housing inner chamber to form two disconnected upper and lower cavitys, and the lower end of valve rod is stretched out the lower end of valve seat and is provided with the spool that opens and closes valve seat.
Above-mentioned spool is: the bottom at valve rod is provided with annular boss, on the valve rod of annular boss downside, be set with seal ring, seal ring compresses by the nut being screwed onto on valve rod, and the upper surface moving up and down with dynamic seal ring of valve rod coordinates the path of closing or open liquid entering hole and liquid outlet with valve seat.
Between the above-mentioned valve rod assembly that stretches out valve seat upper end and upper end cap, being provided with pressure regulator is: the top of upper end cap is provided with tapped hole, the pressure regulation nut that is provided with bottom band spring seat on tapped hole, the top of pressure adjusting spring holds out against in spring seat upper and lower part and holds out against above piston.
Above-mentioned pressure adjusting spring comprises one-level spring and is set in the two-level spring outside one-level spring, the spring seat upper and lower end that the upper end of described one-level spring is arranged on pressure regulation nut holds out against on nut, the upper surface that the unsettled setting in upper end of described two-level spring, lower end are arranged on piston.
Between the above-mentioned valve rod assembly that stretches out valve seat upper end and upper end cap, being provided with pressure regulator is: the top of upper end cap is provided with tapped hole one, on tapped hole one, be provided with pressure regulation nut, outer surface on the top of upper end cap is provided with outside thread, on outside thread, be bolted with pressure cap, on pressure cap, be provided with between two parties tapped hole two, on pressure regulation nut, be provided with between two parties the through hole one with tapped hole two coaxial lines, in tapped hole two, be bolted with bottom with the screw press of spring seat, on screw press, be axially provided with between two parties through hole two, the top of valve rod is located in the through hole two of screw press, the top of pressure adjusting spring holds out against on spring seat, bottom holds out against above piston.
Above-mentioned pressure adjusting spring comprises one-level spring and is set in the two-level spring outside one-level spring, one-level spring housing is located at outside valve rod, the spring seat upper and lower end that upper end holds out against on adjusting screw rod holds out against on nut, two-level spring is set in outside one-level spring, and the upper end of two-level spring holds out against at the bottom plane of adjusting nut upper and lower end and holds out against the upper surface at piston.
Between above-mentioned valve seat outer wall and the inwall of housing, form supporting rib.
Between above-mentioned lower end cap and housing, be provided with seal ring.
The present invention compared to existing technology outstanding advantage is:
1, the position of the pressure regulation nut in upper cover of the present invention and fluid output aperture are once fixing, at outlet end pressure and flow, automatically keep stable, and not because the variation of the pressure of fluid inlet end has large variation, substantially tend towards stability, voltage stabilizing, steady flow result are good;
2, the bottom of valve rod assembly of the present invention is provided with spool, and spool and valve seat interact, and can effectively prevent from taking off pressure adjusting spring and change while operating, and fluid overflows;
3, the present invention includes two-level spring, one-level spring has guaranteed to open certain aperture between the spool of fluid low-pressure state lower valve rod assembly and valve seat effectively;
4, the present invention has the function that reduces outlet end pressure, steady pressure and regime flow, and can not produce noise in working procedure, and quality is high;
5, the present invention is convenient to assembling, is regulated, and volume is little, and convenient formation is specially adapted in cistern free effective toilets, has solved the difficult problem that extraneous water pressure fluctuations is rinsed, and has effectively saved water resources.
Accompanying drawing explanation:
Fig. 1 is embodiment 1 schematic perspective view;
Fig. 2 is embodiment 1 sectional view;
Fig. 3 be embodiment 1 along the liquid entering hole of housing and the sectional schematic diagram of liquid outlet;
Fig. 4 is embodiment 2 schematic perspective view;
Fig. 5 is embodiment 2 sectional view.
Embodiment:
With specific embodiment, the invention will be further described below,
Embodiment 1: referring to Fig. 1-3:
New type auto pressure-reduced and-regulated current stabilizer, on the sidewall of housing 1, offer liquid entering hole 2 and liquid outlet 3, housing 1 upper, lower end is bolted with respectively upper end cap 4, lower end cap 5, the middle part of housing 1 inner chamber is provided with valve seat 6, between the outer wall of the inwall of housing 1 and valve seat 6, be provided with gap, in valve seat 6, be equipped with valve rod assembly 7, valve rod assembly 7 upper, the upper of valve seat 6 stretched out respectively in lower end, lower end, the valve rod assembly 7 that stretches out valve seat 6 upper ends is cut apart housing 1 inner chamber to form two disconnected upper cavities 8, lower chamber 9, the upper opening of the top of valve rod assembly 7 and valve seat 6 slides and is sealed and matched, be provided with pressure regulator 10 stretching out between the valve rod assembly 7 of valve seat 6 upper ends and upper end cap 4, stretch out to be provided with on the valve rod assembly 7 of valve seat 6 lower ends and coordinate the fluid pressure controlled in housing 1 and the spool of flow with pressure regulator 10 and valve seat 6, liquid entering hole 2 is communicated with the inner chamber of valve seat 6, liquid outlet 3 is communicated with the lower chamber 9 of housing 1.
In above-mentioned valve seat 6, being equipped with valve rod assembly 7 is: the middle part of valve seat 6 is equipped with valve rod 71, between the outer wall of the inwall of valve seat 6 and valve rod 71, be provided with gap, the top of valve rod 71 is stretched out the upper end of valve seat 6 and is installed with the piston 72 being sealed and matched with housing 1, the necking part of piston 72 bottoms stretches in the opening on valve seat 6 tops and with valve seat 6 inwalls and slides and be sealed and matched, the upper surface of piston 72 is provided with the rope mother 73 on the top that is screwed onto valve rod 71, piston 72 by housing 1 inner chamber cut apart form two disconnected on, lower chamber 8, 9, the lower end of valve rod 71 is stretched out the lower end of valve seat 6 and is provided with the spool that opens and closes valve seat 6.Wherein: it is to be provided with piston seal glue 74 between housing 1 inwall and piston 72 that piston 72 and housing 1 are sealed and matched; The inwall on the bottom of piston 72 and valve seat 6 tops slides and is sealed and matched is to be provided with between seal ring 75 and valve rod 71 and piston 72 and to be provided with seal ring 76 between the inwall of valve seat 6 and piston 72.
Above-mentioned spool is: in the bottom of valve rod 71, be provided with annular boss 11, the external diameter of annular boss 11 is less than the internal diameter of valve seat 6, on the valve rod 71 of annular boss 11 downsides, be set with seal ring 13, seal ring 13 compresses by the nut 12 being screwed onto on valve rod 71, the upper surface moving up and down with dynamic seal ring 13 of valve rod 71 coordinates with valve seat 6 path of closing or open liquid entering hole and liquid outlet, and the external diameter of described nut 12 is less than the external diameter of piston 72.
Above-mentionedly between the valve rod assembly 7 of valve seat 6 upper ends and upper end cap 4, be provided with pressure regulator 10 and be stretching out: the top of upper end cap 4 is provided with tapped hole, the pressure regulation nut 101 that is provided with bottom band spring seat on tapped hole, the upper end of pressure adjusting spring holds out against at spring seat upper and lower end and holds out against above piston 72.
Above-mentioned pressure adjusting spring comprises one-level spring 102 and is set in the two-level spring 103 outside one-level spring 102, the spring seat upper and lower end that the upper end of described one-level spring 102 is arranged on pressure regulation nut 101 holds out against on rope mother 73, the upper surface that the unsettled setting in upper end of described two-level spring 103, lower end are arranged on piston 72.
When pressure being regulated fixedly by pressure regulation nut 101, fluid acts on valve rod assembly 7 through feed liquor pipeline and fluid pipeline, and the power that spring force and fluid are acted on valve rod assembly 7 balances each other, thereby realizes the function of automatic reducing pressure stabilizing and current stabilization.
When liquid outlet has fluid to flow out, the pressure drop of fluid outlet, piston 72 promotes valve rod assembly 7 and moves down under the effect of spring force, until acting on power and the spring pressure of valve rod assembly 7, housing 1 internal flow balances each other, now, the aperture that the seal ring 13 of spool is certain with valve seat 6 face openings of housing 1 inner chamber, and produce certain liquid resistance, it is constant that outlet end pressure keeps, stability of flow.Its reason is: when fluid inlet end pressure becomes large, the area that acts on piston 72 because of fluid acts on the area of spool by valve seat 6 much larger than fluid, fluid is greater than the pressure of fluid to spool to the pressure of piston 72, so total active force is to promote piston 72 to overcome spring force and move up, valve rod assembly 7 moves on the whole, on band movable valve plug, move, make the gap smaller between spool and valve seat 6 end faces, thereby kept the stable of flow, and because diminishing, spool and valve seat 6 end clearances increased liquid resistance, the pressure of fluid outlet also remains unchanged substantially, otherwise, entrance point pressure diminishes, the gap of spool and valve seat 6 end faces becomes large, same flow keeps stable, outlet pressure is substantially constant.For cistern free effective toilets, be example: adopt the present invention to be connected on toilet, liquid entering hole 2 connects extraneous water source, the rising pipe on liquid outlet 3 connecting base closets.At inlet pressure, from 0.07MPa, be changed in the process of 0.8MPa, in 12 seconds, water-outlet quantity is 2.6L-3.5L, fluid output end pressure is: inlet pressure < 0.1MPa, and outlet end pressure equates with entrance point pressure, 0.1MPa≤inlet pressure≤0.8MPa, outlet end pressure is 0.1MPa-0.11MPa, as can be seen here, flow is basicly stable, and outlet end pressure changes also very little, greatly saved water resources, echoed mutually with the theme of current energy-conserving and environment-protective.
When liquid outlet flows out without fluid, in housing 1 inside, feed liquor pipeline equates with instantaneous the reaching of pressure between fluid pipeline, the pressure that now fluid acts on piston 2 is greater than spring force, valve rod assembly 7, under the drive of piston 72, moves on moment, on band movable valve plug, moves, make the end face sealing of seal ring 13 with the valve seat 6 of spool, outlet end pressure remains setting value.
Between above-mentioned valve seat 6 outer walls and the inwall of housing 1, form supporting rib 15, improved working life of the present invention and reliability.
Between above-mentioned lower end cap 5 and housing 6, be provided with seal ring 16.
Embodiment 2: referring to Fig. 4-5:
The present embodiment and embodiment's 1 structure is basic identical, and its difference is:
Above-mentionedly between the valve rod assembly 7 of valve seat upper end and upper end cap 4, be provided with pressure regulator and be stretching out: the top of upper end cap 4 is provided with tapped hole one, on tapped hole one, be provided with look nut 24, outer surface on the top of upper end cap 4 is provided with outside thread, on outside thread, be bolted with pressure cap 17, on pressure cap 17, be provided with between two parties tapped hole two, on look nut 24, be provided with between two parties the through hole 1 with tapped hole two coaxial lines, in tapped hole two, be bolted with bottom with the screw press 19 of spring seat, on screw press 19, be axially provided with between two parties through hole 2 20, the top of valve rod 71 is located in the through hole 2 20 of screw press 19, the upper end of pressure adjusting spring holds out against on spring seat, lower end holds out against above piston moving plate 72.
Above-mentioned pressure adjusting spring comprises one-level spring 21 and is set in the two-level spring 22 outside one-level spring 21, one-level spring 21 is set in outside valve rod 71, one end holds out against on the spring seat on adjusting screw rod 19, the other end holds out against on rope mother 73, two-level spring 22 is set in outside one-level spring 21, and one end of two-level spring 22 holds out against on the bottom plane of look nut 24, the other end holds out against the upper surface at piston 72.
Above-described embodiment is only one of preferred embodiment of the present invention, not with this, limits practical range of the present invention, therefore: all equivalences of doing according to shape of the present invention, structure, principle change, within all should being covered by protection scope of the present invention.
Claims (8)
1. new type auto pressure-reduced and-regulated current stabilizer, it is characterized in that: on the sidewall of housing, offer liquid entering hole and liquid outlet, housing upper, lower end is connected with respectively, lower end cap, the middle part of housing inner chamber is provided with valve seat, between the inwall of housing and the outer wall of valve seat, be provided with gap, in valve seat, be equipped with valve rod assembly, valve rod assembly upper, the upper of valve seat stretched out respectively in lower end, lower end, the valve rod assembly that stretches out valve seat upper end by housing inner chamber cut apart form two disconnected on, lower chamber, the top of valve rod assembly and the upper opening of valve seat slide and are sealed and matched, be provided with pressure regulator stretching out between the valve rod assembly of valve seat upper end and upper end cap, stretch out to be provided with on the valve rod assembly of valve seat lower end and coordinate the fluid pressure controlled in housing and the spool of flow with pressure regulator and valve seat, liquid entering hole is communicated with the inner chamber of valve seat, liquid outlet is communicated with the lower chamber of housing, between the described valve rod assembly that stretches out valve seat upper end and upper end cap, being provided with pressure regulator is: the top of upper end cap is provided with tapped hole one, on tapped hole one, be provided with look nut, outer surface on the top of upper end cap is provided with outside thread, on outside thread, be bolted with pressure cap, on pressure cap, be provided with between two parties tapped hole two, on look nut, be provided with between two parties the through hole one with tapped hole two coaxial lines, in tapped hole two, be bolted with bottom with the screw press of spring seat, on screw press, be axially provided with between two parties through hole two, the top of valve rod is located in the through hole two of screw press, the upper end of pressure adjusting spring holds out against on spring seat, lower end holds out against above piston.
2. new type auto pressure-reduced and-regulated current stabilizer according to claim 1, it is characterized in that: in described valve seat, being equipped with valve rod assembly is: the middle part of valve seat is equipped with valve rod, between the inwall of valve seat and the outer wall of valve rod, be provided with gap, the top of valve rod is stretched out the upper end of valve seat and is installed with the piston coordinating with housing seal, the necking part of piston bottom stretches in the opening on valve seat top and with valve base inner wall and slides and be sealed and matched, the upper surface of piston is provided with the rope mother on the top that is screwed onto valve rod, piston by housing inner chamber cut apart form two disconnected on, lower chamber, the lower end of valve rod is stretched out the lower end of valve seat and is provided with the spool that opens and closes valve seat.
3. new type auto pressure-reduced and-regulated current stabilizer according to claim 2, it is characterized in that: described spool is: the bottom at valve rod is provided with annular boss, on the valve rod of annular boss downside, be set with seal ring, seal ring compresses by the nut being screwed onto on valve rod, and the upper surface moving up and down with dynamic seal ring of valve rod coordinates the path of closing or open liquid entering hole and liquid outlet with valve seat.
4. new type auto pressure-reduced and-regulated current stabilizer according to claim 1, it is characterized in that: described in stretch out and between the valve rod assembly of valve seat upper end and upper end cap, be provided with pressure regulator and be: the top of upper end cap is provided with tapped hole, the pressure regulation nut that is provided with bottom band spring seat on tapped hole, the upper end of pressure adjusting spring holds out against at spring seat upper and lower end and holds out against above piston.
5. new type auto pressure-reduced and-regulated current stabilizer according to claim 4, it is characterized in that: described pressure adjusting spring comprises one-level spring and is set in the two-level spring outside one-level spring, the spring seat upper and lower end that the upper end of described one-level spring is arranged on pressure regulation nut holds out against on rope mother, and the unsettled setting in the upper end of described two-level spring, lower end are arranged on the upper surface of piston.
6. new type auto pressure-reduced and-regulated current stabilizer according to claim 1, it is characterized in that: described pressure adjusting spring comprises one-level spring and is set in the two-level spring outside one-level spring, one-level spring housing is located at outside valve rod, the spring seat upper and lower end that upper end holds out against on adjusting screw rod holds out against on rope mother, two-level spring is set in outside one-level spring, and the upper end of two-level spring holds out against at the bottom plane of adjusting nut upper and lower end and holds out against the upper surface at piston.
7. new type auto pressure-reduced and-regulated current stabilizer according to claim 1, is characterized in that: between described valve seat outer wall and the inwall of housing, form supporting rib.
8. new type auto pressure-reduced and-regulated current stabilizer according to claim 1, is characterized in that: between described lower end cap and housing, be provided with seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210157189.6A CN102678994B (en) | 2012-05-17 | 2012-05-17 | Automatic decompression voltage and current stabilizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210157189.6A CN102678994B (en) | 2012-05-17 | 2012-05-17 | Automatic decompression voltage and current stabilizer |
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| CN102678994A CN102678994A (en) | 2012-09-19 |
| CN102678994B true CN102678994B (en) | 2014-03-05 |
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| CN201210157189.6A Active CN102678994B (en) | 2012-05-17 | 2012-05-17 | Automatic decompression voltage and current stabilizer |
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| CN203571137U (en) | 2013-10-17 | 2014-04-30 | 成霖企业股份有限公司 | Regulator valve |
| CN104563242A (en) | 2013-10-17 | 2015-04-29 | 成霖企业股份有限公司 | A control system and method for a flush toilet |
| CN106090363B (en) * | 2016-08-31 | 2018-02-23 | 常德翔宇设备制造有限公司 | Two-stage gas pressure reducing valve |
| CN108227771B (en) * | 2016-12-14 | 2020-10-16 | 中国航空工业集团公司北京长城计量测试技术研究所 | Adjustable double-variable-volume gas micro-pressure adjusting device and method |
| CN107237383B (en) * | 2017-05-26 | 2023-02-28 | 厦门倍杰特科技有限公司 | Large-flow voltage stabilizer |
| CN107299665B (en) * | 2017-05-26 | 2023-04-07 | 厦门倍杰特科技有限公司 | Water distribution device of toilet without water tank |
| CN108843463B (en) * | 2018-05-04 | 2020-04-28 | 凯迈（洛阳）气源有限公司 | Pressure regulating and reducing valve, thruster assembly and engine |
| CN110017381A (en) * | 2019-04-04 | 2019-07-16 | 北消安全设备(北京)有限公司 | A kind of pilot valve for pressure reducing valve |
| CN112113013B (en) * | 2019-06-19 | 2025-01-28 | 赖政 | A double-layer pneumatic pressure reducing valve |
| CN110594461B (en) * | 2019-09-29 | 2021-06-22 | 重庆宏广机电工程有限公司 | Compensation pressure-stabilizing valve |
| CN111081480B (en) * | 2019-12-25 | 2021-11-23 | 湖南法恩莱特新能源科技有限公司 | Electrolyte pressure adjusting device |
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| CN113108241A (en) * | 2021-04-25 | 2021-07-13 | 杭州春江阀门有限公司 | Ultrahigh pressure cylinder valve of hydrogen energy vehicle |
| CN113108240A (en) * | 2021-04-25 | 2021-07-13 | 杭州春江阀门有限公司 | Ultrahigh pressure cylinder valve |
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| CN202597827U (en) * | 2012-05-17 | 2012-12-12 | 浙江维卫电子洁具有限公司 | Novel automatic pressure reducing and stabilizing and current stabilizing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201190823Y (en) * | 2008-03-14 | 2009-02-04 | 孔军波 | Pressure reducing valve with improved structure |
| CN101649926B (en) * | 2008-08-15 | 2011-07-20 | 费海鸿 | Pressure valve |
| JP2010186353A (en) * | 2009-02-12 | 2010-08-26 | Danrei:Kk | Pressure reducing valve |
| CN201475437U (en) * | 2009-07-17 | 2010-05-19 | 泉州中宇卫浴科技实业有限公司 | Constant-current non-return valve |
| CN201772117U (en) * | 2009-11-02 | 2011-03-23 | 王金龙 | Novel reducing valve |
| CN201672118U (en) * | 2010-05-07 | 2010-12-15 | 常州市汇丰船舶附件制造有限公司 | High pressure gas pressure reducer valve |
| CN201706027U (en) * | 2010-06-19 | 2011-01-12 | 奉化市盛灵气动机电有限公司 | Compressed air pressure regulating valve |
| CN201884739U (en) * | 2010-11-24 | 2011-06-29 | 广东联塑科技实业有限公司 | Adjustable plastic pressure-reducing valve with double springs |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202597827U (en) * | 2012-05-17 | 2012-12-12 | 浙江维卫电子洁具有限公司 | Novel automatic pressure reducing and stabilizing and current stabilizing device |
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