CN102313054B - Piston type pressure reducing valve - Google Patents
Piston type pressure reducing valve Download PDFInfo
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- CN102313054B CN102313054B CN201110238587.6A CN201110238587A CN102313054B CN 102313054 B CN102313054 B CN 102313054B CN 201110238587 A CN201110238587 A CN 201110238587A CN 102313054 B CN102313054 B CN 102313054B
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- 230000008859 change Effects 0.000 claims abstract description 9
- 230000009467 reduction Effects 0.000 claims description 24
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000008676 import Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- 210000004894 snout Anatomy 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 210000000214 mouth Anatomy 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000008358 core component Substances 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Abstract
The invention discloses a piston type pressure reducing valve, which comprises a valve body with an inlet and an outlet and a valve core component which is arranged in the valve body, wherein a medium passage for communicating the inlet with the outlet is formed in the valve body; a throttle port is formed in the medium passage; the valve core component corresponds to the throttle port and comprises a valve core frame, a valve rod and a valve flap; the valve core frame is fixed in the valve body; the valve rod is arranged in the valve core frame to move up and down relative to the valve core frame; the valve flap is arranged at the lower end of the valve rod to move up and down along with the valve rod so as to change medium flow of the medium passage; a sealing device is arranged between the valve rod and the valve core frame to separate the upper part from the lower part of the valve core frame; a pressure reducing structure for reducing medium pressure in the medium passage is arranged between the lower part of the valve core frame and the valve rod; and an adjusting structure for adjusting pressure reducing capacity of the pressure reducing structure is arranged above the valve core frame. In the valve, a single-spring internal adjustment structure is adopted, so that error operation is avoided; and by changing the throttle area, the flow velocity and kinetic energy of fluid are changed to cause different pressure loss and automatically keep constant outlet pressure.
Description
Technical field
The present invention relates to a kind of Piston reducing valve.
Background technique
The patent No. is that the utility model patent of CN200820083711.X discloses a kind of adjustable compression release valve, and it is little that it has solved the automatic regulation range of existing reduction valve, the problem that sensitivity is low.This adjustable compression release valve comprises having the valve body of water-inlet cavity and water chamber and be arranged on the valve rod in valve body, in described water-inlet cavity and the valve body between water chamber, be provided with lumen, water-inlet cavity and water chamber communicate by lumen, in lumen, be provided with sealing surface and can form with sealing surface the spool of sealing, be arranged in water-inlet cavity above-mentioned valve handle activity, its one end passes water-inlet cavity and spool is connected, in water chamber, be provided with lower piston, the other end of valve rod oppositely passes water-inlet cavity and above-mentioned lower piston is connected, bottom at lower piston is provided with spring, one end of spring withstands on lower piston, the other end withstand on can the controlling mechanism of Regulation spring elastic force on.This adjustable compression release valve is fixed with lower piston in the lower end of valve rod, by piston, increase sensitivity, on valve body, be provided for the controlling mechanism of Regulation spring elastic force simultaneously, increased the Applicable scope of adjustable compression release valve, regulation structure is only comprised of adjustment seat and adjusting nut, simple in structure.Having in addition the patent No. is that the utility model patent of CN201020153923.8 discloses a kind of Piston reducing valve, and it has solved existing Piston reducing valve cannot be to opening and closing the problems such as element is directly removed for repair or replacement.This Piston reducing valve comprise have into, the valve body of outlet, valve body upper end is provided with the bonnet being tightly connected, valve body lower end is provided with the bottom flange being tightly connected, valve body, the chamber that bonnet and bottom flange form forms a piston cylinder, the outlet of valve body is communicated with piston cylinder, its import was passed through water channel with piston cylinder and was communicated with, in piston cylinder, be provided with the base and the screw mandrel that seal and can be slidably connected with valve interior wall, between base and valve gap, be provided with and can promote above-mentioned base and the descending spring of screw mandrel, screw mandrel upper end and base are connected, its lower end is fixed with and can regulates the above-mentioned open-shut device of crossing water channel aperture size.The lower valve body of this Piston reducing valve and valve body are and removably connect, thus can by the open-shut device from the dismounting of screw mandrel lower end by the connection hole of valve body and valve body take apart, realize maintenance and the replacing of open-shut device.
But, all there is following shortcoming in the disclosed two kinds of structure of relief pressure valve of above-mentioned two patent of invention:
1, spool is a peninsula in valve body, be a part for valve body, it is not individual components, therefore manufacture as larger in difficulty such as forging and stamping, castings, moreover due to the restriction of valve inner peninsular structure, so connect the runner limited size that water-inlet cavity communicates with lumen, cause runner mouth to have effect of easing stress, and this part effect of easing stress is to be determined by valve body structure, nonadjustable, even controlling mechanism is set on valve body as described in above-mentioned patent, increased the Applicable scope of reduction valve, but in fact the pressure-adjustable scope of reduction valve is still limited;
2, the seal plate on reduction valve or claim spool all in bottom flange or claim in the chamber of bonnet, increase along with reduction valve aperture, seal plate or claim spool to stretch into valve gap or claim in the chamber of bonnet more, compression area on seal plate or title spool is diminishing, as described in above-mentioned patent, in the lower end of valve rod, be fixed with lower piston, by piston, increased its sensitivity, these two kinds of results cause a certain pressure of valve inner or compression area to change a little also can affect outlet pressure, makes outlet pressure non-constant;
3, lower valve body or claim bonnet and valve body to be to removably connect, realized maintenance and the replacing of open-shut device, also caused thus valve body bottom space to diminish, reduced pressure capabilities declines, thus function is influenced, and component increase, and small product size and weight become greatly.
Summary of the invention
Problem to be solved by this invention is just to provide a kind of Piston reducing valve, simple and reasonable, manufactures easy for installationly, and the runner position with effect of easing stress is concentrated, and reduces the decompression problem causing because of valve mechanism simultaneously, realizes adjustable pressure scope and maximizes; Solve the constant problem that regulates flap openings of sizes to cause the variation of the interior a certain pressure of valve body or compression area and affect downstream pressure; In the situation that not increasing component and small product size and weight, make product manufacture, assembling and maintenance and dismounting become convenient.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme: a kind of Piston reducing valve, comprise and be provided with the valve body of import and outlet and be located at the mangetic core assembly in valve body, in valve body, be provided with the medium channel of import and outlet connection, in medium channel, be provided with restriction, mangetic core assembly is corresponding with restriction and change the pressure medium before and after restriction, it is characterized in that: described mangetic core assembly comprises the valve core frame being fixed in valve body, be located at the valve rod that in valve core frame, valve core frame moves up and down relatively and be located at valve rod lower end and with valve rod, move up and down to change the flap of medium channel rate-of flow, between valve rod and valve core frame, being provided with seal arrangement completely cuts off valve core frame upper and lower to come, between valve core frame bottom and valve rod, be provided with the pressure reduction structure that reduces medium channel medium pressure, above valve core frame, be provided with the regulation structure that regulates pressure reduction structure reduced pressure capabilities.Adopt valve core frame structure that valve body manufacture difficulty is reduced, make assembling, maintenance and dismounting become simple, convenient.
Further, described seal arrangement comprises the seal ring that is fixed on valve rod top, and the madial wall at the outer side surface of seal ring and valve core frame middle part closely cooperates.
Further, described pressure reduction structure is the throttling boss that is located at valve rod middle part, throttling boss is positioned at restriction top, between throttling boss and seal ring, forms snout cavity, has gap formation upstream pressure transmission channel import is communicated with snout cavity between throttling boss and valve core frame madial wall.
Further, lower end outer side wall and the restriction of described valve core frame are sealed and matched, described pressure reduction structure also comprises the throttle orifice being located on valve core frame, throttle orifice is corresponding with throttling boss height position, and flap moves up and down with the lower end surface of valve core frame and coordinates the rate-of flow that changes medium channel with valve rod.
Further, described pressure reduction structure also comprises the channel cylinder that is located at valve core frame lower end, the equal opening in the upper and lower two ends of channel cylinder, and valve rod passes channel cylinder downwards, and flap moves up and down with channel cylinder lower end surface and coordinates the rate-of flow that changes medium channel with valve rod.The runner position with effect of easing stress is concentrated on to channel cylinder and throttling lug boss position, increased pressure regulation precision and scope.
Further, described regulation structure comprise the valve gap that is connected with valve seal, be located at the screw adjustments in valve gap and be located at screw adjustments and valve rod between pressure adjusting spring, valve gap upper end open, the upper end of pressure adjusting spring withstands on the lower end surface of screw adjustments, the lower end of pressure adjusting spring be against valve rod upper end and by valve rod to pressing down, valve gap madial wall is provided with the internal thread coordinating with screw adjustments.
Further, described screw adjustments is the thread plate with inner hexagonal hole, the side of thread plate be provided with valve gap madial wall on the outside thread of screw-internal thread fit, valve gap upper end is provided with the block of end closure on valve gap.
Further, between described valve gap and valve core frame, be provided with compression spring.
Further, described valve rod upper end is provided with gag, the lower end of pressure adjusting spring is against on gag upper surface, between gag and valve core frame, be sealed and matched, between gag lower surface and valve core frame upper surface, form oral cavity, valve core frame is provided with through hole, is provided with through hole and coordinates the downstream pressure transmission channel that outlet plenum is communicated with outlet in valve body.
Further, on described valve body, be positioned at restriction rear and be provided with the pressure gauge connection for pressure medium after external pressure gauge detection valve.
Adopt after technique scheme, tool of the present invention has the following advantages: adopt mode-structure in single spring, and anti-misoperation, volume is little, lightweight, be convenient to manufacture, assembling and maintenance and dismounting; By changing orifice size, the kinetic energy of flow velocity and fluid is changed, cause the different pressure losses, make outlet pressure automatically keep constant.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the structural representation of mangetic core assembly;
Fig. 3 is A-A sectional drawing in Fig. 2;
Fig. 4 is the schematic diagram that the present invention makes italic formula structure on architecture basics shown in Fig. 1.
Embodiment
The structural representation of an embodiment of the present invention as illustrated in fig. 1 and 2, a kind of Piston reducing valve, comprise and be provided with the valve body 1 of import 11 and outlet 12 and be located at the mangetic core assembly in valve body, in valve body, be provided with the medium channel 13 of import and outlet connection, in medium channel, be provided with restriction 14, mangetic core assembly is corresponding with restriction and change the pressure medium before and after restriction, described mangetic core assembly comprises the valve core frame 2 being fixed in valve body, be located at the valve rod 3 that in valve core frame, valve core frame moves up and down relatively and be located at valve rod lower end and with valve rod, move up and down to change the flap 4 of medium channel rate-of flow, between valve rod and valve core frame, being provided with seal arrangement completely cuts off valve core frame upper and lower to come, between valve core frame bottom and valve rod, be provided with the pressure reduction structure that reduces pressure medium, above valve core frame, be provided with the regulation structure that regulates pressure reduction structure reduced pressure capabilities.
Described seal arrangement comprises the seal ring 31 that is fixed on valve rod top, the madial wall at the outer side surface of seal ring and valve core frame middle part closely cooperates, in the present embodiment, the axially locating of seal ring realizes by gag and shaft block ring, can certainly adopt other common modes to realize, not repeat them here.Described pressure reduction structure is the throttling boss 32 that is located at valve rod middle part, throttling boss is positioned at restriction top, between throttling boss and seal ring, form snout cavity 33, between throttling boss and valve core frame madial wall, there is gap and form upstream pressure transmission channel 34 import is communicated with snout cavity, on this basis, can also extend valve core frame downwards, lower end outer side wall and the restriction of valve core frame are sealed and matched, described pressure reduction structure also comprises the throttle orifice 21 being located on valve core frame, throttle orifice is corresponding with throttling boss height position, therefore, flap moves up and down with the lower end surface of valve core frame and coordinates the rate-of flow that changes medium channel with valve rod, in this structure, as shown in Figure 3, throttle orifice is provided with altogether four and circumferential hoop and is located in valve core frame sidewall bodies, the one, can eliminate the decompression problem that the snout cavity structure of valve core frame causes, the 2nd, prevent that valve core frame unbalance stress from causing valve to shake even play and sound, can make some improvement in addition, in valve core frame lower end, increase channel cylinder 22, the equal opening in the upper and lower two ends of channel cylinder, valve rod passes channel cylinder downwards, flap moves up and down with channel cylinder lower end surface and coordinates the rate-of flow that changes medium channel with valve rod, the design of channel cylinder, has solved and has regulated the variation of a certain pressure in the valve causing after channel cylinder openings of sizes or compression area and affect the problem that downstream pressure is constant, in the present embodiment, the independent moulding of throttling boss is installed on valve rod, also throttling boss and valve rod can be made to one, or by throttling boss and the one-body molded manufacture of valve core frame, correspondingly between valve core frame and throttling boss, through hole is set as upstream pressure transmission channel, channel cylinder is threaded fixing with valve core frame, manufacture is installed all very simple and convenient.In throttling boss lower end, outer side surface is provided with tapering face, and channel cylinder inner side surface upper end oral area is provided with tapering face, and while making like this medium through channel cylinder, pressure drop is more stable.
Described regulation structure comprise the valve gap 5 that is connected with valve seal, be located at the screw adjustments 6 in valve gap and be located at screw adjustments and valve rod between pressure adjusting spring 7, valve gap upper end open, the upper end of pressure adjusting spring withstands on the lower end surface of screw adjustments, the lower end of pressure adjusting spring be against valve rod upper end and by valve rod to pressing down, valve gap madial wall is provided with the internal thread 51 coordinating with screw adjustments.By adjusting screw adjustments, in valve gap different heights position, change the spring force of pressure adjusting spring, thereby the reduced pressure capabilities that changes pressure reduction structure, within the reduced pressure capabilities scope of reduction valve, the position of the relative valve gap of screw adjustments is lower, the reduced pressure capabilities of pressure reduction structure is larger, otherwise just less.Screw adjustments can adopt the common threaded pieces such as bolt, in the present embodiment, in order to realize, prevent that people from being misoperation and preventing that pollutant from entering and affect the reduction valve function in working life, by screw adjustments, it is the thread plate with inner hexagonal hole 61, the side of thread plate be provided with valve gap madial wall on the outside thread of screw-internal thread fit, valve gap upper end is provided with the block of end closure on valve gap 8.In valve rod upper end, be provided with gag 35, the lower end of pressure adjusting spring is against on gag upper surface, between gag and valve core frame, be sealed and matched, between gag lower surface and valve core frame upper surface, form oral cavity 91, valve core frame is provided with through hole 23, is provided with through hole and coordinates the downstream pressure transmission channel 15 that outlet plenum is communicated with outlet in valve body.In addition in the present embodiment, the boss that the lower surface of thread plate is provided with downward protrusion comes the upper end of retaining spring, and gag upper surface is provided with the lower end that boss protruding upward carrys out retaining spring, so that stable when the installation of spring and pressure regulation.
In above-described embodiment, between valve gap and valve core frame, be provided with compression spring 9, prevent the loosening even problem such as seepage of valve core frame play that causes of reduction valve valve gap in long-term using process; On valve body, be positioned at restriction rear and be provided with the pressure gauge connection 16 for pressure medium after external pressure gauge detection valve, be convenient to the downstream pressure that external pressure gauge detects medium.
Valve core frame in the present invention and gag form first stage piston structure, valve core frame and seal ring form second piston structure, and make pressure that seal ring lower end surface and gag lower end surface be subject to and reach balance with the active force that gag upper-end surface is subject to spring by upstream pressure transmission channel and downstream pressure transmission channel and pressure adjusting spring, realize stable decompression.The present invention can select upright structures or italic formula structure according to the difference of use occasion in addition.As shown in Figure 1, valve volume is little, lightweight for upright structures; Pressure gauge connection is symmetrical arranged, and is convenient to the installation of diverse location and direction; As shown in Figure 4, WATER AS FLOW MEDIUM force characteristic is good for italic formula structure, and valve body is easily processed; Pressure gauge installation and measuring is convenient, attractive in appearance.
Except above preferred embodiment, the present invention also has other mode of execution, and those skilled in the art can make according to the present invention various changes and distortion, only otherwise depart from spirit of the present invention, all should belong to the defined scope of claims of the present invention.
Claims (7)
1. a Piston reducing valve, comprise and be provided with the valve body (1) of import (11) and outlet (12) and be located at the mangetic core assembly in valve body, in valve body, be provided with the medium channel (13) of import and outlet connection, in medium channel, be provided with restriction (14), mangetic core assembly is corresponding with restriction and change the pressure medium before and after restriction, described mangetic core assembly comprises the valve core frame (2) being fixed in valve body, be located at the valve rod (3) that in valve core frame, valve core frame moves up and down relatively and be located at valve rod lower end and with valve rod, move up and down to change the flap (4) of medium channel rate-of flow, between valve rod and valve core frame, being provided with seal arrangement completely cuts off valve core frame upper and lower to come, described seal arrangement comprises the seal ring (31) that is fixed on valve rod top, the madial wall at the outer side surface of seal ring and valve core frame middle part closely cooperates, between valve core frame bottom and valve rod, be provided with the pressure reduction structure that reduces pressure medium, above valve core frame, be provided with the regulation structure that regulates pressure reduction structure reduced pressure capabilities, it is characterized in that: described pressure reduction structure is the throttling boss (32) that is located at valve rod middle part, throttling boss is positioned at restriction top, between throttling boss and seal ring, form snout cavity (33), between throttling boss and valve core frame madial wall, there is gap, described gap forms upstream pressure transmission channel (34) import is communicated with snout cavity, described valve rod upper end is provided with gag (35), the lower end of pressure adjusting spring is against on gag upper surface, between gag and valve core frame, be sealed and matched, between gag lower surface and valve core frame upper surface, form oral cavity (91), valve core frame is provided with through hole (23), is provided with through hole and coordinates the downstream pressure transmission channel (15) that outlet plenum is communicated with outlet in valve body.
2. a kind of Piston reducing valve according to claim 1, it is characterized in that: lower end outer side wall and the restriction of described valve core frame are sealed and matched, described pressure reduction structure also comprises the throttle orifice (21) being located on valve core frame, throttle orifice is corresponding with throttling boss height position, and flap moves up and down with the lower end surface of valve core frame and coordinates the rate-of flow that changes medium channel with valve rod.
3. a kind of Piston reducing valve according to claim 2, it is characterized in that: described pressure reduction structure also comprises the channel cylinder (22) that is located at valve core frame lower end, the equal opening in the upper and lower two ends of channel cylinder, valve rod passes channel cylinder downwards, and flap moves up and down with channel cylinder lower end surface and coordinates the rate-of flow that changes medium channel with valve rod.
4. a kind of Piston reducing valve according to claim 1, it is characterized in that: described regulation structure comprise the valve gap (5) that is connected with valve seal, be located at the screw adjustments (6) in valve gap and be located at screw adjustments and valve rod between pressure adjusting spring (7), valve gap upper end open, the upper end of pressure adjusting spring withstands on the lower end surface of screw adjustments, the lower end of pressure adjusting spring be against valve rod upper end and by valve rod to pressing down, valve gap madial wall is provided with the internal thread (51) coordinating with screw adjustments.
5. a kind of Piston reducing valve according to claim 4, it is characterized in that: described screw adjustments is the thread plate of band inner hexagonal hole (61), the side of thread plate be provided with valve gap madial wall on the outside thread of screw-internal thread fit, valve gap upper end is provided with the block of end closure on valve gap (8).
6. according to a kind of Piston reducing valve described in claim 4 or 5, it is characterized in that: between described valve gap and valve core frame, be provided with compression spring (9).
7. a kind of Piston reducing valve according to claim 1, is characterized in that: on described valve body, be positioned at restriction rear and be provided with the pressure gauge connection (16) for pressure medium after external pressure gauge detection valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110238587.6A CN102313054B (en) | 2011-08-19 | 2011-08-19 | Piston type pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110238587.6A CN102313054B (en) | 2011-08-19 | 2011-08-19 | Piston type pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
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| CN102313054A CN102313054A (en) | 2012-01-11 |
| CN102313054B true CN102313054B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110238587.6A Active CN102313054B (en) | 2011-08-19 | 2011-08-19 | Piston type pressure reducing valve |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277553B (en) * | 2013-05-25 | 2016-01-20 | 铜陵市三圆特种铸造有限责任公司 | A kind of large discharge balanced type pressure regulator valve |
| CN105333187A (en) * | 2015-11-27 | 2016-02-17 | 扬中市通发实业有限公司 | Pressure regulating valve |
| CN109210241B (en) * | 2017-07-03 | 2024-02-23 | 芜湖美的厨卫电器制造有限公司 | Safety valve and water heater |
| CN112113014B (en) * | 2019-06-19 | 2025-01-24 | 赖政 | A multi-layer pneumatic pressure reducing valve |
| CN111042764B (en) * | 2019-12-09 | 2021-10-01 | 陕西航天泵阀科技集团有限公司 | Emergency breaking device for natural gas wellhead adjustment |
| CN112682549B (en) * | 2020-12-25 | 2022-08-19 | 上海百图低温阀门有限公司 | Compact pressure regulating valve suitable for low-temperature storage tank |
| CN113175560A (en) * | 2021-06-15 | 2021-07-27 | 浙江金隆铜业股份有限公司 | Valve body with pre-filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1259565A (en) * | 1969-05-30 | 1972-01-05 | ||
| CN101270829A (en) * | 2008-05-06 | 2008-09-24 | 济南角度科技发展有限公司 | Embedded valve container type adjustable dynamic flow equalizing valve |
| CN201339738Y (en) * | 2008-11-07 | 2009-11-04 | 湖南湘天源阀门制造有限公司 | Hydraulic control membrane type pressure regulator with high step-down ratio |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58106273A (en) * | 1981-12-16 | 1983-06-24 | Sotokazu Rikuta | Constant flow valve |
| JPS5940073A (en) * | 1982-08-31 | 1984-03-05 | Chiyoda Chem Eng & Constr Co Ltd | Device for attenuating acting force of valve rod for speed regulating valve |
| JPS59190587A (en) * | 1983-04-14 | 1984-10-29 | Toshiba Corp | High differential pressure control valve |
| JP2006127332A (en) * | 2004-11-01 | 2006-05-18 | Mitsubishi Heavy Ind Ltd | Flow control valve |
-
2011
- 2011-08-19 CN CN201110238587.6A patent/CN102313054B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1259565A (en) * | 1969-05-30 | 1972-01-05 | ||
| CN101270829A (en) * | 2008-05-06 | 2008-09-24 | 济南角度科技发展有限公司 | Embedded valve container type adjustable dynamic flow equalizing valve |
| CN201339738Y (en) * | 2008-11-07 | 2009-11-04 | 湖南湘天源阀门制造有限公司 | Hydraulic control membrane type pressure regulator with high step-down ratio |
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| CN102313054A (en) | 2012-01-11 |
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Address after: 311835 Zhuji port industrial area, Zhejiang Patentee after: ZHEJIANG DUNAN VALVE Co.,Ltd. Address before: 311835 Zhuji City, Zhejiang Province Industrial Zone, mouth shop Patentee before: ZHEJIANG DUNAN VALVE Co.,Ltd. |
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Address after: 311800 Zhejiang city in Shaoxing Province town of Zhuji city shop Industrial Zone Patentee after: Zhejiang deai Intelligent Control Technology Co.,Ltd. Address before: 311835 Zhuji port industrial area, Zhejiang Patentee before: ZHEJIANG DUNAN VALVE Co.,Ltd. |
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Denomination of invention: Piston type pressure reducing valve Effective date of registration: 20211220 Granted publication date: 20140416 Pledgee: Diankou sub branch of Zhejiang Zhuji Rural Commercial Bank Co.,Ltd. Pledgor: Zhejiang deai Intelligent Control Technology Co.,Ltd. Registration number: Y2021980015397 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230724 Granted publication date: 20140416 Pledgee: Diankou sub branch of Zhejiang Zhuji Rural Commercial Bank Co.,Ltd. Pledgor: Zhejiang deai Intelligent Control Technology Co.,Ltd. Registration number: Y2021980015397 |