CN102313054A - Piston type pressure reducing valve - Google Patents
Piston type pressure reducing valve Download PDFInfo
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- CN102313054A CN102313054A CN201110238587A CN201110238587A CN102313054A CN 102313054 A CN102313054 A CN 102313054A CN 201110238587 A CN201110238587 A CN 201110238587A CN 201110238587 A CN201110238587 A CN 201110238587A CN 102313054 A CN102313054 A CN 102313054A
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- 230000008859 change Effects 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims description 25
- 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
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000008358 core component Substances 0.000 abstract 2
- 238000012423 maintenance Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process 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 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005266 casting 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
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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 the valve body valve rod interior with being arranged on valve body with water-inlet cavity and water chamber, is provided with lumen in the valve body between described water-inlet cavity and the water chamber, and water-inlet cavity and water chamber communicate through lumen; In lumen, be provided with sealing surface and the spool that can form sealing with sealing surface; Be arranged in the water-inlet cavity, the one of which end passes water-inlet cavity and spool is connected above-mentioned valve handle activity, in water chamber, is 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, and an end of spring withstands on the 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; Increase sensitivity through piston, 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 formed by regulating seat and adjusting nut, and is simple in structure.It is that the utility model patent of CN201020153923.8 discloses a kind of Piston reducing valve that the patent No. is arranged in addition, and it has solved existing piston formula reduction valve can't directly dismantle problems such as maintenance or replacing to opening and closing element.This Piston reducing valve comprises the valve body with inlet/outlet; The valve body upper end is provided with the bonnet that is tightly connected, and valve body lower end is provided with the bottom flange that is tightly connected, and the chamber that valve body, bonnet and bottom flange are formed 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, and was provided with the base and the screw mandrel that seal and can be slidingly connected with valve interior wall in the piston cylinder, was provided with between base and the valve gap and can promotes above-mentioned base and the descending spring of screw mandrel; The screw mandrel upper end is connected with base, and its lower end is fixed with can regulate the above-mentioned open-shut device of crossing water channel aperture size.The following valve body of this Piston reducing valve and valve body are and removably connect, and can the open-shut device of the dismounting from the screw mandrel lower end be taken apart the maintenance and the replacing of realization open-shut device by the connection hole of valve body down and valve body thus.
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 the valve body, is the part of valve body, is not individual components; Therefore difficulty such as manufacturing as forging and pressing, casting are bigger, moreover because the restriction of valve inner peninsular structure, so connect the runner limited size that water-inlet cavity communicates with lumen; Cause the runner mouth that effect of easing stress is arranged; And this part effect of easing stress is to be determined by valve body structure, is nonadjustable, even like the said controlling mechanism that on valve body, is provided with of above-mentioned patent; Increased the Applicable scope of reduction valve, but but in fact the range of regulation of reduction valve is still limited;
2, seal plate on the reduction valve or title spool all are in bottom flange or claim in the chamber of bonnet; Along with the increase of reduction valve aperture, seal plate or claim spool stretch into valve gap or claim in the chamber of bonnet many more, seal plate or claim that the compression area on the spool is diminishing; Be fixed with lower piston like the said lower end of above-mentioned patent at valve rod; Increased its sensitivity through piston, these two kinds of results cause a certain pressure of valve inner or compression area to change a little also can influence outlet pressure, makes outlet pressure non-constant;
3, following valve body or claim that bonnet and valve body are and removably connect has been realized the maintenance and the replacing of open-shut device, has also caused the valve body bottom space to diminish thus, and reduced pressure capabilities descends, thereby function is influenced, and component increase, and small product size and weight change are greatly.
Summary of the invention
Problem to be solved by this invention just provides a kind of Piston reducing valve, and is simple and reasonable, makes easy for installationly, and concentrate the runner position that will have effect of easing stress, reduces the decompression problem that causes because of valve mechanism simultaneously, realizes the maximization of adjustable pressure scope; Solve to regulate the flap openings of sizes to cause the variation of a certain pressure in the valve body or compression area and influence the constant problem of downstream pressure; Under the situation that does not increase component and small product size and weight, make product manufacturing, 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 the valve body that is provided with import and outlet and be located at the mangetic core assembly in the valve body; Be provided with the medium channel that import and outlet are communicated with in the valve body; Be provided with restriction in the medium channel; Mangetic core assembly is corresponding with restriction and change the pressure medium before and after the restriction, it is characterized in that: said mangetic core assembly comprises the valve core frame that is fixed in the valve body, be located in the valve core frame valve rod that valve core frame relatively moves up and down and be located at the valve rod lower end and move up and down the flap that changes the medium channel rate-of flow with valve rod, is provided with seal arrangement between valve rod and the valve core frame and comes the valve core frame upper and lower is isolated; 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 of regulating the pressure reduction structure reduced pressure capabilities.Adopt the valve core frame structure that the valve body manufacture difficulty is reduced, make assembling, maintenance and dismounting become simple, convenient.
Further, said 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; Said pressure reduction structure is the throttling boss that is located at the valve rod middle part; The throttling boss is positioned at restriction top, forms snout cavity between throttling boss and the seal ring, has gap formation upstream pressure transmission channel between throttling boss and the valve core frame madial wall import is communicated with snout cavity.
Further; The lower outside wall and the restriction of said valve core frame are sealed and matched; Said pressure reduction structure also comprises the throttle orifice that is located on the valve core frame; Throttle orifice is corresponding with throttling boss height and position, and flap moves up and down with the lower end surface of valve core frame with valve rod and cooperates the rate-of flow that changes medium channel.
Further, said pressure reduction structure also comprises the channel cylinder that is located at the valve core frame lower end, and channel cylinder is the equal opening in two ends up and down, and valve rod passes channel cylinder downwards, and flap moves up and down with the channel cylinder lower end surface with valve rod and cooperates the rate-of flow that changes medium channel.The runner position that will have effect of easing stress concentrates on channel cylinder and throttling lug boss position, has increased pressure regulation precision and scope.
Further; Said regulation structure comprise the valve gap that is connected with valve seal, be located at the screw adjustments in the valve gap and be located at screw adjustments and valve rod between pressure adjusting spring; The valve gap open upper end; 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 with valve rod to pressing down, the valve gap madial wall is provided with the internal thread that cooperates with screw adjustments.
Further, said screw adjustments is the thread plate of band inner hexagonal hole, the side of thread plate be provided with the valve gap madial wall on the outside thread of screw-internal thread fit, the valve gap upper end is provided with the block with end closure on the valve gap.
Further, be provided with compression spring between said valve gap and the valve core frame.
Further; Said valve rod upper end is provided with gag; The lower end of pressure adjusting spring is against on the gag upper surface, is sealed and matched between gag and the valve core frame, forms outlet plenum between gag lower surface and the valve core frame upper surface; Valve core frame is provided with through hole, is provided with in the valve body with through hole to cooperate the downstream pressure transmission channel that outlet plenum is communicated with outlet.
Further, being positioned at the restriction rear on the said valve body is provided with and is used for the pressure gauge connection that external pressure gauge detects pressure medium behind the valve.
After adopting technique scheme, the present invention has following advantage: adopt mode-structure in single spring, and anti-misoperation, volume is little, in light weight, be convenient to make, assembling and maintenance and dismounting; Through changing orifice size, the kinetic energy of flow velocity and fluid is changed, cause the different pressure losses, make outlet pressure keep constant automatically.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
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 an A-A sectional drawing among Fig. 2;
Fig. 4 makes the schematic representation of italic formula structure on architecture basics shown in Figure 1 for the present invention.
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 the valve body 1 that is provided with import 11 and outlet 12 and be located at the mangetic core assembly in the valve body; Be provided with the medium channel 13 that import and outlet are communicated with in the valve body; Be provided with restriction 14 in the medium channel; Mangetic core assembly is corresponding with restriction and change the pressure medium before and after the restriction, and said mangetic core assembly comprises the valve core frame 2 that is fixed in the valve body, be located in the valve core frame valve rod 3 that valve core frame relatively moves up and down and be located at the valve rod lower end and move up and down the flap 4 that changes the medium channel rate-of flow with valve rod, is provided with seal arrangement between valve rod and the valve core frame and comes the valve core frame upper and lower is isolated; 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 of regulating the pressure reduction structure reduced pressure capabilities.
Said 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 through gag and shaft block ring, can certainly adopt other common modes to realize, repeats no more at this.Said pressure reduction structure is the throttling boss 32 that is located at the valve rod middle part; The throttling boss is positioned at the restriction top; Form snout cavity 33 between throttling boss and the seal ring, have gap formation upstream pressure transmission channel 34 between throttling boss and the valve core frame madial wall import is communicated with snout cavity; On this basis, can also prolong valve core frame downwards, the lower outside wall and the restriction of valve core frame are sealed and matched; Said pressure reduction structure also comprises the throttle orifice 21 that is located on the valve core frame, and throttle orifice is corresponding with throttling boss height and position, therefore; Flap moves up and down with the lower end surface of valve core frame with valve rod and cooperates the rate-of flow that changes medium channel; In this structure, as shown in Figure 3, throttle orifice is provided with four and circumferential hoop altogether and is located on the 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 the valve core frame unbalance stress from causing valve vibrations even play and sound; Can make some improvement in addition; Increase channel cylinder 22 in the valve core frame lower end; Channel cylinder is the equal opening in two ends up and down, and valve rod passes channel cylinder downwards, and flap moves up and down with the channel cylinder lower end surface with valve rod and cooperates the rate-of flow that changes medium channel; The design of channel cylinder has solved the variation of regulating a certain pressure in the valve that causes after the channel cylinder openings of sizes or compression area and has influenced the constant problem of downstream pressure; In the present embodiment; The independent moulding of throttling boss is installed on the valve rod; Also can throttling boss and valve rod be processed one, perhaps, correspondingly between valve core frame and throttling boss, through hole is set as the upstream pressure transmission channel with throttling boss and the one-body molded manufacturing of valve core frame; Channel cylinder is threaded fixing with valve core frame, manufacturing is installed all very simple and convenient.Be provided with the tapering face at throttling boss lower outside face, channel cylinder inner side surface upper end oral area is provided with the tapering face, and when making medium through channel cylinder like this, pressure descends more stable.
Said regulation structure comprise the valve gap 5 that is connected with valve seal, be located at the screw adjustments 6 in the valve gap and be located at screw adjustments and valve rod between pressure adjusting spring 7; The valve gap open upper end; 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 with valve rod to pressing down, the valve gap madial wall is provided with the internal thread 51 that cooperates with screw adjustments.Change the spring force of pressure adjusting spring in valve gap different heights position through the adjustment screw adjustments; Thereby change the reduced pressure capabilities of pressure reduction structure, within the reduced pressure capabilities scope of reduction valve, the position of the relative valve gap of screw adjustments is low more; The reduced pressure capabilities of pressure reduction structure is big more, otherwise just more little.Screw adjustments can adopt common threaded pieces such as bolt; In the present embodiment; In order to realize preventing that the people from being misoperation and prevent that the pollutant entering from influencing the reduction valve function in working life; With the thread plate of screw adjustments for band inner hexagonal hole 61, the side of thread plate be provided with the valve gap madial wall on the outside thread of screw-internal thread fit, the valve gap upper end is provided with the block 8 with end closure on the valve gap.Be provided with gag 35 in the valve rod upper end; The lower end of pressure adjusting spring is against on the gag upper surface; Be sealed and matched between gag and the valve core frame; Form outlet plenum 91 between gag lower surface and the valve core frame upper surface, valve core frame is provided with through hole 23, is provided with in the valve body with through hole to cooperate the downstream pressure transmission channel 15 that outlet plenum is communicated with outlet.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 the gag upper surface is provided with the lower end that boss protruding upward comes retaining spring, so that stable when the installation of spring and pressure regulation.
In the foregoing description, be provided with compression spring 9 between valve gap and the valve core frame, prevent the loosening problems such as valve core frame play even seepage that cause of reduction valve valve gap in long-term using process; Be positioned at the restriction rear on the valve body and be provided with and be used for the pressure gauge connection 16 that external pressure gauge detects pressure medium behind the valve, be convenient to the downstream pressure that external pressure gauge detects medium.
Valve core frame among the present invention and gag form the first stage piston structure; Valve core frame and seal ring form the second piston structure; And make pressure that seal ring lower end surface and gag lower end surface receive and reach balance with active force that the gag upper-end surface receives spring through 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.Upright structures is as shown in Figure 1, and valve volume is little, in light weight; Pressure gauge connection is symmetrical set, and is convenient to the installation of diverse location and direction; Italic formula structure is as shown in Figure 4, and the WATER AS FLOW MEDIUM force characteristic is good, and valve body is processed easily; The pressure gauge installation and measuring is convenient, attractive in appearance.
Except that above-mentioned preferred embodiment, the present invention also has other mode of execution, and those skilled in the art can make various changes and distortion according to the present invention, only otherwise break away from spirit of the present invention, all should belong to the defined scope of accompanying claims of the present invention.
Claims (10)
1. Piston reducing valve; Comprise the valve body (1) that is provided with import (11) and outlet (12) and be located at the mangetic core assembly in the valve body; Be provided with the medium channel (13) that import and outlet are communicated with in the valve body; Be provided with restriction (14) in the medium channel; Mangetic core assembly is corresponding with restriction and change the pressure medium before and after the restriction, it is characterized in that: said mangetic core assembly comprises the valve core frame (2) that is fixed in the valve body, be located in the valve core frame valve rod (3) that valve core frame relatively moves up and down and be located at the valve rod lower end and move up and down the flap (4) that changes the medium channel rate-of flow with valve rod, is provided with seal arrangement between valve rod and the valve core frame and the valve core frame upper and lower is completely cut off comes; 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 of regulating the pressure reduction structure reduced pressure capabilities.
2. a kind of Piston reducing valve according to claim 1 is characterized in that: said seal arrangement comprises the seal ring (31) 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.
3. a kind of Piston reducing valve according to claim 1; It is characterized in that: said pressure reduction structure is the throttling boss (32) that is located at the valve rod middle part; The throttling boss is positioned at the restriction top; Form snout cavity (33) between throttling boss and the seal ring, have the gap between throttling boss and the valve core frame madial wall and form upstream pressure transmission channel (34) import is communicated with snout cavity.
4. a kind of Piston reducing valve according to claim 3; It is characterized in that: the lower outside wall and the restriction of said valve core frame are sealed and matched; Said pressure reduction structure also comprises the throttle orifice (21) that is located on the valve core frame; Throttle orifice is corresponding with throttling boss height and position, and flap moves up and down with the lower end surface of valve core frame with valve rod and cooperates the rate-of flow that changes medium channel.
5. a kind of Piston reducing valve according to claim 4; It is characterized in that: said pressure reduction structure also comprises the channel cylinder (22) that is located at the valve core frame lower end; Channel cylinder is the equal opening in two ends up and down; Valve rod passes channel cylinder downwards, and flap moves up and down with the channel cylinder lower end surface with valve rod and cooperates the rate-of flow that changes medium channel.
6. a kind of Piston reducing valve according to claim 1; It is characterized in that: said regulation structure comprise the valve gap (5) that is connected with valve seal, be located at the screw adjustments (6) in the valve gap and be located at screw adjustments and valve rod between pressure adjusting spring (7); The valve gap open upper end; 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 with valve rod to pressing down, the valve gap madial wall is provided with the internal thread (51) that cooperates with screw adjustments.
7. a kind of Piston reducing valve according to claim 6; It is characterized in that: said screw adjustments is the thread plate of band inner hexagonal hole (61); The side of thread plate be provided with the valve gap madial wall on the outside thread of screw-internal thread fit, the valve gap upper end is provided with the block (8) with end closure on the valve gap.
8. according to claim 6 or 7 described a kind of Piston reducing valves, it is characterized in that: be provided with compression spring (9) between said valve gap and the valve core frame.
9. according to claim 1,2,3 or 6 described a kind of Piston reducing valves; It is characterized in that: said valve rod upper end is provided with gag (35); The lower end of pressure adjusting spring is against on the gag upper surface, is sealed and matched between gag and the valve core frame, forms outlet plenum (91) between gag lower surface and the valve core frame upper surface; Valve core frame is provided with through hole (23), is provided with in the valve body with through hole to cooperate the downstream pressure transmission channel (15) that outlet plenum is communicated with outlet.
10. a kind of Piston reducing valve according to claim 9 is characterized in that: be positioned at the restriction rear on the said valve body and be provided with and be used for the pressure gauge connection (16) that external pressure gauge detects pressure medium behind the 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 |
|---|---|
| CN102313054A true CN102313054A (en) | 2012-01-11 |
| CN102313054B CN102313054B (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110238587.6A Active CN102313054B (en) | 2011-08-19 | 2011-08-19 | Piston type pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102313054B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277553A (en) * | 2013-05-25 | 2013-09-04 | 铜陵市三圆特种铸造有限责任公司 | Mass-flow balanced type pressure regulating valve |
| CN105333187A (en) * | 2015-11-27 | 2016-02-17 | 扬中市通发实业有限公司 | Pressure regulating valve |
| CN109210241A (en) * | 2017-07-03 | 2019-01-15 | 芜湖美的厨卫电器制造有限公司 | Safety valve and water heater |
| CN111042764A (en) * | 2019-12-09 | 2020-04-21 | 陕西航天泵阀科技集团有限公司 | Emergency breaking device for natural gas wellhead adjustment |
| CN112682549A (en) * | 2020-12-25 | 2021-04-20 | 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 |
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| GB1259565A (en) * | 1969-05-30 | 1972-01-05 | ||
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| 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 |
| 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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| GB1259565A (en) * | 1969-05-30 | 1972-01-05 | ||
| 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 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277553A (en) * | 2013-05-25 | 2013-09-04 | 铜陵市三圆特种铸造有限责任公司 | Mass-flow balanced type pressure regulating valve |
| CN105333187A (en) * | 2015-11-27 | 2016-02-17 | 扬中市通发实业有限公司 | Pressure regulating valve |
| CN109210241A (en) * | 2017-07-03 | 2019-01-15 | 芜湖美的厨卫电器制造有限公司 | Safety valve and water heater |
| 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 |
| CN111042764A (en) * | 2019-12-09 | 2020-04-21 | 陕西航天泵阀科技集团有限公司 | Emergency breaking device for natural gas wellhead adjustment |
| CN112682549A (en) * | 2020-12-25 | 2021-04-20 | 上海百图低温阀门有限公司 | Compact pressure regulating valve suitable for low-temperature storage tank |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102313054B (en) | 2014-04-16 |
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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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