CN106979340B - Small-flow high-pressure difference regulating valve - Google Patents
Small-flow high-pressure difference regulating valve Download PDFInfo
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- CN106979340B CN106979340B CN201710265603.8A CN201710265603A CN106979340B CN 106979340 B CN106979340 B CN 106979340B CN 201710265603 A CN201710265603 A CN 201710265603A CN 106979340 B CN106979340 B CN 106979340B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
- F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
A small-flow high-pressure difference regulating valve relates to a regulating valve. The labyrinth disc regulating valve has the following defects due to the structure: the cost is high and the user's choice of adjustment characteristics is limited. The invention comprises a valve body, a valve core, a valve cover and a valve rod; the valve core comprises a pressing sleeve, a valve seat and discs, wherein the pressing sleeve is provided with lateral liquid inlet holes which are uniformly distributed in the circumferential direction, the discs are provided with vertical holes which are uniformly distributed in the circumferential direction and penetrate up and down, the bottom surfaces of the pressing sleeve and each disc are provided with annular grooves which are recessed upwards, the annular grooves are communicated with the vertical holes, the vertical holes between the upper disc and the lower disc are rotationally staggered, and the inner side of the annular groove of the disc at the bottom of the valve core is provided with a liquid outlet channel which is communicated with a valve rod hole vertical to the valve core; the lower end of the valve rod is a downward convex curved surface. The technical scheme can effectively realize high pressure difference and equal percentage adjustment of liquid flow, has simple structure, simplifies the manufacturing process, shortens the manufacturing period and reduces the manufacturing cost.
Description
Technical Field
The invention relates to a regulating valve, in particular to a small-flow high-pressure difference regulating valve.
Background
In petrochemical industry, the working condition parameters of the regulating valve with small Cv value (below 10) and large pressure difference (about 30 MPa) are frequently met, and a labyrinth disc type regulating valve is usually selected during type selection. The labyrinth disc regulating valve has the following defects due to the structure: firstly, the manufacturing cost is high, and the market competition is not strong; secondly, the valve flow characteristic curve is a linear or approximately equal percentage flow characteristic curve, and the selection of the user on the adjustment characteristic is limited.
Disclosure of Invention
The invention aims to solve the technical problems and the technical task, improves the prior art, and provides a small-flow high-pressure difference regulating valve, so as to realize the flow characteristic curve of a standard equal-percentage valve and improve the market competitiveness. For this purpose, the present invention adopts the following technical scheme.
The small-flow high-pressure difference regulating valve comprises a valve body, a valve core arranged in the valve body, a valve cover pressed on the valve core and a valve rod capable of moving up and down to regulate flow, wherein valve rod holes matched with the valve rod are formed in the middle parts of the valve cover and the valve core, and the valve rod is arranged in the valve rod holes; the valve core comprises a pressing sleeve positioned at the top of the valve core, a valve seat positioned at the bottom of the valve core and a plurality of vertically superposed disks positioned between the pressing sleeve and the valve seat, wherein the pressing sleeve is provided with lateral liquid inlet holes uniformly distributed in the circumferential direction, the disks are provided with vertical holes penetrating up and down uniformly distributed in the circumferential direction, the bottom surfaces of the pressing sleeve and each disk are provided with annular grooves recessed upwards, the annular grooves are communicated with the vertical holes, the vertical holes between the upper adjacent disk and the lower adjacent disk are rotationally staggered, and the inner side of the annular groove of the disk at the bottom of the valve core is provided with a liquid outlet channel communicated with the valve rod hole of the valve core vertically; the lower end of the valve rod is a downward convex curved surface. Through the vertical arrangement of the discs, liquid flows in from the side surface of the top, passes through the annular grooves of each layer and the vertical holes staggered in the upper layer and the lower layer, flows into the vertical valve rod holes through the liquid outlet channels at the bottom, and can effectively realize the adjustment of the liquid flow rate with high pressure difference, standard percentage and the like through the lifting of the regulating valve rod.
As a further improvement and supplement to the above-mentioned technical solutions, the present invention also includes the following additional technical features.
The disc include locate the upper disc of cover below, locate the lower disc of disk seat top, locate a plurality of well discs between upper disc and the lower disc, the inboard of upper disc upwards is protruding to have annular neck, the top surface of annular neck pastes with the bottom surface of valve gap, the outside up end of upper disc pastes with the lower terminal surface of cover, the cover that presses in the outside of annular neck, the top surface of cover pastes with the bottom surface of valve gap, the well lower part inboard of cover is equipped with the step, the ring channel of cover is the region between step lateral wall and the annular neck outer wall presses, the side direction feed liquor hole communicate with each other with the upper portion of the ring channel of cover. The pressure is reduced from top to bottom through the disc structures and the pressing sleeve structures at the top, the middle and the bottom, and the disc has simple structure and convenient processing and manufacturing.
The top surfaces of the middle disc and the lower disc are provided with upward protruding annular positioning ribs, the bottom surfaces of the upper disc and the middle disc are provided with upward annular grooves, the annular positioning ribs extend into the annular grooves of the upper disc upwards, the inner side walls of the annular positioning ribs are attached to the inner side walls of the annular grooves, and the annular grooves of the upper disc and the middle disc are parts of the annular grooves located on the outer sides of the annular positioning ribs. The upper and lower positioning of the disc is realized through the annular positioning rib, the annular groove is used for positioning and liquid pressure regulating buffering, and the structure is exquisite and practical.
The annular grooves on the pressing sleeve, the upper disc, the middle disc and the lower disc have the same width as the radial positions on the discs, and the vertical holes on the upper disc, the middle disc and the lower disc have the same diameter as the radial positions on the discs. The same size specification is convenient for batch processing, and the size does not need to be adjusted during processing, so that the processing and manufacturing period is shortened.
The liquid outlet channel is a cutting groove on the bottom surface of the lower disc. The cutting groove can be directly processed by a milling cutter, so that the processing is convenient and the cost is low.
The outside of the top of the valve seat is provided with an annular step, and the outside of the bottom of the lower disc is provided with a downward convex ring matched with the annular step of the valve seat. Through the cooperation of annular step and bulge loop, location simple structure, processing is convenient.
The middle lower part of the vertical central hole of the valve seat is a conical surface with a small diameter and a large diameter. The conical surface with the smaller diameter and the larger diameter is convenient to process, compared with the traditional cylindrical surface, the flow blocking phenomenon of the side wall is not easy to occur when water is discharged, and the outflow efficiency is high.
The middle of the bottom of the valve seat is provided with a round table which extends downwards, the round table is embedded into the valve body, and the end face of the bottom of the valve seat at the outer side of the round table is attached to the valve body. The positioning and fixing are convenient, and the structure is simple.
The round platform outside of disk seat bottom is equipped with the recess that encircles, is equipped with the metal winding pad in the recess. The metal winding pad has the advantages of convenient installation, good sealing performance, adaptability to various corrosive liquids and stable and reliable performance.
The curved surface at the lower end of the valve rod is a standard equal-percentage flow characteristic curved surface for realizing equal-percentage flow regulation.
The beneficial effects are that: the high pressure difference and equal percentage adjustment of the liquid flow can be effectively realized, the structure is simple, the manufacturing process is simplified, the manufacturing period is shortened, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention.
Fig. 2 is a schematic bottom view of the lower disc of the present invention.
In the figure: 1-a valve body; 2-metal winding pad; 3-valve seat; 4-lower disc; 5-middle disc; 6-loading a disc; 7-pressing the sleeve; 8-a valve rod; 9-a valve cover; 10-valve stem bore; 101-inlet; 102-outlet; 401-a liquid outlet channel; 501-annular positioning ribs; 502-vertical holes; 503-annular groove; 601-annular neck; 701-lateral inlet.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
As shown in fig. 1 and 2, the low-flow high-pressure difference regulating valve comprises a valve body 1, a valve core arranged in the valve body 1 and a valve cover 9 pressed on the valve core, wherein a valve rod 8 for regulating flow is arranged in a vertical valve rod hole 10 of the valve cover 9 and the valve core, the valve core comprises a pressing sleeve 7 positioned at the top of the valve core, a valve seat 3 positioned at the bottom of the valve core, and 5 disks vertically arranged between the pressing sleeve 7 and the valve seat 3, the pressing sleeve 7 is provided with lateral liquid inlet holes 701 uniformly distributed in the circumferential direction, the disks are provided with vertical holes 502 penetrating up and down uniformly distributed in the circumferential direction, the bottom surfaces of the pressing sleeve 7 and each disk are provided with annular grooves 503 recessed upwards, the annular grooves 503 are communicated with the vertical holes 502, the vertical holes 502 between the upper adjacent disk and the lower adjacent disk are rotationally dislocated, and the inner side of the annular grooves 503 of the disk at the bottom of the valve core is provided with a liquid outlet channel 401 communicated with the vertical valve rod hole 10 of the valve core; the lower end of the valve rod 8 is a standard equal-percentage flow characteristic curved surface for realizing equal-percentage flow regulation.
In order to realize pressure decrease and convenient processing and manufacturing, the disc comprises an upper disc 6 arranged below a pressing sleeve 7, a lower disc 4 arranged above a valve seat 3, 3 middle discs 5 arranged between the upper disc 6 and the lower disc 4, an annular neck 601 is upwards protruded on the inner side of the upper disc 6, the top surface of the annular neck 601 is attached to the bottom surface of a valve cover 9, the outer side upper end surface of the upper disc 6 is attached to the lower end surface of the pressing sleeve 7, the pressing sleeve 7 is sleeved on the outer side of the annular neck 601, the top surface of the pressing sleeve 7 is attached to the bottom surface of the valve cover 9, a step is arranged on the inner side of the middle lower portion of the pressing sleeve 7, an annular groove 503 of the pressing sleeve 7 is an area between the side wall of the step and the outer wall of the annular neck 601, and a lateral liquid inlet 701 is communicated with the upper portion of the annular groove 503 of the pressing sleeve 7. The pressure is effectively reduced from top to bottom through the disc structures of the upper, middle and lower parts and the pressing sleeve 7 structure, and the disc has simple structure and convenient processing and manufacturing.
For convenient positioning assembly and liquid pressure regulating buffering, the top surfaces of the middle disc 5 and the lower disc 4 are provided with upward protruding annular positioning ribs 501, the bottom surfaces of the upper disc 6 and the middle disc 5 are provided with upward annular grooves, the annular positioning ribs 501 extend upward into the annular grooves of the upper disc, the inner side walls of the annular positioning ribs 501 are attached to the inner side walls of the annular grooves, and the annular grooves 503 of the upper disc 6 and the middle disc 5 are parts of the annular grooves located on the outer sides of the annular positioning ribs 501. The upper and lower positioning of the disc is realized through the annular positioning rib 501, the annular groove 503 is used for positioning and liquid pressure regulating buffering, and the structure is exquisite and practical.
For unifying processing dimensions, the widths of the annular grooves 503 on the pressing sleeve 7, the upper disc 6, the middle disc 5 and the lower disc 4 are the same as the radial positions on the discs, and the diameters of the vertical holes 502 on the upper disc 6, the middle disc 5 and the lower disc 4 are the same as the radial positions on the discs. The same size specification is convenient for batch processing, the size does not need to be adjusted during processing, the processing and the manufacturing are convenient, and the processing and the manufacturing period is shortened.
For convenience of processing, the liquid outlet channel 401 is a blanking groove on the bottom surface of the lower disc 4. The cutting groove can be directly processed by a milling cutter, so that the processing is convenient and the cost is low.
In order to achieve a simple positioning structure and facilitate processing, the outer side of the top of the valve seat 3 is provided with an annular step, and the outer side of the bottom of the lower disc 4 is provided with a downward convex ring matched with the annular step of the valve seat 3. Through the cooperation of annular step and bulge loop, location simple structure can directly mill the processing, and processing is convenient.
In order to eliminate the choked flow phenomenon, the middle lower part of the vertical central hole of the valve seat 3 is a conical surface with a small diameter and a large diameter. The conical surface with the smaller diameter and the larger diameter is convenient to process, compared with the traditional cylindrical surface, the flow blocking phenomenon of the side wall is not easy to occur when water is discharged, and the outflow efficiency is high.
In order to realize the connection, positioning and fixing of the valve seat 3 and the valve body 1, a circular truncated cone extending downwards is arranged in the middle of the bottom of the valve seat 3, the circular truncated cone is embedded into the valve body 1, and the end face of the bottom of the valve seat 3 outside the circular truncated cone is attached to the valve body 1. The positioning and fixing are convenient, and the structure is simple.
In order to realize stable and reliable sealing performance, the outer side of a round table at the bottom of the valve seat 3 is provided with a surrounding groove, and a metal winding pad 2 is arranged in the groove. The metal winding pad 2 has the advantages of convenient installation, good sealing performance, adaptability to various corrosive liquids and stable and reliable performance.
The lower section of the valve rod 8 is a large-diameter section, the upper section is a small-diameter section, and the small-diameter section of the valve rod 8 is matched with the valve cover 9; the large diameter section of the valve rod is matched with the valve body 1, and the large diameter section of the valve rod 8 is provided with a vertical groove which is vertically communicated, so that the upper pressure and the lower pressure of the valve rod 8 can be basically equal, and the stress of the valve rod is reduced. The working reliability is improved.
Liquid flows into the lateral liquid inlet 701 from the inlet 101 of the valve body 1, sequentially and alternately flows through the annular groove 503 and the vertical hole 502, flows into the vertical valve rod hole 10 from the liquid outlet 401, and flows out from the outlet 102 of the valve body 1 by adjusting the lifting of the valve rod 8, so that the pressure reduction, the standard and other percentages of liquid flow adjustment are realized.
The technical proposal
1. A labyrinth runner is canceled, and an orifice plate disc with concave-convex upper and lower positioning is adopted;
2. closing the inlet and outlet ports of the middle-layer disc;
3. the runner inlet is arranged on the uppermost pressing sleeve and flows in from the small hole;
4. the runner outlet is arranged at the bottom of the disc at the lowest layer and flows out from the milling groove;
5. the lower end of the valve core rod is designed into a standard equal-percentage flow characteristic curved surface.
Thereby bringing about the following significant effects:
1. the disc is processed by common turning, drilling and milling equipment, so that the difficulty is low, the working procedures are few, the construction period is short, and the cost is low;
2. a plurality of flow characteristic curved surface designs, and a user can select the flow characteristic curved surface designs;
3. the radial size of the valve is small, the height space is rich, and the radial size of the pressure reduction progression is unchanged;
4. the orifice plate disc is increased or decreased, and the stroke is unchanged; the pressure difference can be changed by adding or reducing the disc, and the pressure difference is convenient to adjust so as to meet different requirements.
5. The valve body is selectable from straight-through or angular. Simple design and assembly, easy use and structure, reliable operation,
the small-flow high-pressure difference regulating valve shown in the above figures 1 and 2 is a specific embodiment of the invention, has already shown the essential characteristics and improvements of the invention, and can be equivalently modified in terms of shape, structure and the like according to practical use requirements under the teaching of the invention, and is within the scope of protection of the scheme.
Claims (8)
1. The small-flow high-pressure difference regulating valve comprises a valve body (1), a valve core arranged in the valve body (1), a valve cover (9) pressed on the valve core, and a valve rod (8) capable of moving up and down to regulate flow, wherein valve rod holes (10) matched with the valve rod (8) are formed in the middle of the valve cover (9) and the valve core, and the valve rod (8) is arranged in the valve rod holes (10); the method is characterized in that: the valve core comprises a pressing sleeve (7) positioned at the top of the valve core, a valve seat (3) positioned at the bottom of the valve core, and a plurality of vertically stacked discs positioned between the pressing sleeve (7) and the valve seat (3);
the disc comprises an upper disc (6) arranged below the pressing sleeve (7), a lower disc (4) arranged above the valve seat (3) and a plurality of middle discs (5) arranged between the upper disc (6) and the lower disc (4);
the pressing sleeve (7) is provided with lateral liquid inlet holes (701) which are uniformly distributed in the circumferential direction, the discs are provided with vertical holes (502) which are uniformly distributed in the circumferential direction and penetrate up and down, the bottom surfaces of the pressing sleeve (7) and each disc are provided with annular grooves (503) which are concave upwards, the annular grooves (503) are communicated with the vertical holes (502), the vertical holes (502) between the upper disc and the lower disc are rotationally staggered, and the inner side of the annular groove (503) of the lower disc of the valve core is provided with a liquid outlet channel (401) which is communicated with a vertical valve rod hole (10) of the valve core; the lower end of the valve rod (8) is a downward convex curved surface;
the top surfaces of the middle disc (5) and the lower disc (4) are provided with upward protruding annular positioning ribs (501), the bottom surfaces of the upper disc (6) and the middle disc (5) are provided with upward annular grooves, the annular positioning ribs (501) extend into the annular grooves of the upper disc upwards, the inner side walls of the annular positioning ribs (501) are attached to the inner side walls of the annular grooves, and the annular grooves (503) of the upper disc (6) and the middle disc (5) are parts of the annular grooves located on the outer sides of the annular positioning ribs (501).
2. The low flow high differential pressure regulating valve as defined in claim 1, wherein: the inner side of the upper disc (6) is provided with an annular neck (601) in an upward protruding mode, the top surface of the annular neck (601) is attached to the bottom surface of the valve cover (9), the upper end surface of the outer side of the upper disc (6) is attached to the lower end surface of the pressing sleeve (7), the pressing sleeve (7) is sleeved on the outer side of the annular neck (601), the top surface of the pressing sleeve (7) is attached to the bottom surface of the valve cover (9), the inner side of the middle lower portion of the pressing sleeve (7) is provided with a step, an annular groove (503) of the pressing sleeve (7) is an area between the side wall of the step and the outer wall of the annular neck (601), and the lateral liquid inlet (701) is communicated with the upper portion of the annular groove (503) of the pressing sleeve (7); the widths of annular grooves (503) on the pressing sleeve (7), the upper disc (6), the middle disc (5) and the lower disc (4) are the same as the radial positions on the discs, and the diameters of vertical holes (502) on the upper disc (6), the middle disc (5) and the lower disc (4) are the same as the radial positions on the discs.
3. The low flow high differential pressure regulating valve as defined in claim 1, wherein: the liquid outlet channel (401) is a cutting groove on the bottom surface of the lower disc (4).
4. The low flow high differential pressure regulating valve as defined in claim 1, wherein: the outside of the top of the valve seat (3) is provided with an annular step, and the outside of the bottom of the lower disc (4) is provided with a downward convex ring matched with the annular step of the valve seat (3).
5. The low flow high pressure differential regulator valve according to claim 4, wherein: the middle lower part of the vertical central hole of the valve seat (3) is a conical surface with a small diameter and a big bottom.
6. The low flow high differential pressure regulating valve as defined in claim 1, wherein: the middle of the bottom of the valve seat (3) is provided with a round table which extends downwards, the round table is embedded into the valve body (1), and the end face of the bottom of the valve seat (3) at the outer side of the round table is attached to the valve body (1).
7. The low flow high pressure differential regulator valve according to claim 6, wherein: the outer side of the round table at the bottom of the valve seat (3) is provided with a surrounding groove, and a metal winding pad (2) is arranged in the groove.
8. A low flow high pressure differential regulator valve according to any one of claims 1-7, wherein: the curved surface at the lower end of the valve rod (8) is a standard equal-percentage flow characteristic curved surface for realizing equal-percentage flow regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265603.8A CN106979340B (en) | 2017-04-21 | 2017-04-21 | Small-flow high-pressure difference regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265603.8A CN106979340B (en) | 2017-04-21 | 2017-04-21 | Small-flow high-pressure difference regulating valve |
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| Publication Number | Publication Date |
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| CN106979340A CN106979340A (en) | 2017-07-25 |
| CN106979340B true CN106979340B (en) | 2023-08-22 |
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| CN201710265603.8A Active CN106979340B (en) | 2017-04-21 | 2017-04-21 | Small-flow high-pressure difference regulating valve |
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| CN (1) | CN106979340B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906251A (en) * | 2017-12-18 | 2018-04-13 | 青岛电站阀门有限公司 | High-differential-pressure regulating valve |
| CN109139929B (en) * | 2018-09-29 | 2020-04-24 | 合肥通用机械研究院有限公司 | Groove type series multistage pressure reduction regulating valve |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2314203Y (en) * | 1997-07-25 | 1999-04-14 | 清华大学 | Labyrinth style high pressure differential fluid regulating valve |
| CN201087765Y (en) * | 2007-10-23 | 2008-07-16 | 秦皇岛五洲电力设备有限公司 | Compact cascade-decompressing regulating valve with high pressure difference |
| CN101504079A (en) * | 2009-03-07 | 2009-08-12 | 无锡智能自控工程有限公司 | Screw-in forged high pressure air defense small-flow corner valve |
| CN201526678U (en) * | 2009-11-20 | 2010-07-14 | 重庆川仪十一厂有限公司 | Multistage decompression high-differential-pressure regulating valve |
| WO2011118863A1 (en) * | 2010-03-26 | 2011-09-29 | System D&D Co.,Ltd. | Fluid flow control device |
| CN202733154U (en) * | 2012-07-24 | 2013-02-13 | 镇江市铸造阀门厂有限公司 | Multi-stage pressure-reducing pore plate type high-pressure difference regulating valve |
| CN104006170B (en) * | 2014-06-13 | 2016-03-02 | 江南阀门有限公司 | High Pressure Difference boiler periodical blowdown modulating valve |
| CN206708385U (en) * | 2017-04-21 | 2017-12-05 | 杭州东辰热力辅机有限公司 | A kind of small flow high-differential-pressure regulating valve |
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2017
- 2017-04-21 CN CN201710265603.8A patent/CN106979340B/en active Active
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Address after: Building 5, No. 101 Qihang Road, Renhe Street, Yuhang District, Hangzhou City, Zhejiang Province, 311107 Applicant after: Dongchen Intelligent Technology Co.,Ltd. Address before: 311115 No. 7 Xiuyan Road, Fengdu Village, Pingyao Town, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: HANGZHOU DONGCHEN HEATING POWER AUXILIARY Co.,Ltd. |
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Inventor after: Wang Lihua Inventor after: Liu Qingqing Inventor before: Liu Qingqing |
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