CN110715109B - Self-cleaning multi-stage pressure reduction regulating valve - Google Patents
Self-cleaning multi-stage pressure reduction regulating valve Download PDFInfo
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- CN110715109B CN110715109B CN201910986310.8A CN201910986310A CN110715109B CN 110715109 B CN110715109 B CN 110715109B CN 201910986310 A CN201910986310 A CN 201910986310A CN 110715109 B CN110715109 B CN 110715109B
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- valve
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- cleaning
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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
- 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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
Abstract
The invention relates to a self-cleaning multistage pressure reduction regulating valve which comprises a valve body with a hollow interior, wherein a sleeve is arranged on the inner bottom surface of the valve body, an interlayer is arranged in the valve body and positioned outside the outer circumferential surface of the sleeve, a sewage discharge cavity is formed between the interlayer and the inner wall surface of the valve body, and a sewage discharge groove is formed in the interlayer; the middle part of the sleeve is provided with a valve core; the sleeve comprises a plurality of layers of disks which are overlapped at intervals, a plurality of through holes for fluid to flow are formed in each disk, and the fluid flows through the through holes in the disks and the interlayer flow channels to generate friction to realize the step-by-step pressure reduction; the valve rod drives the valve core to move so that the valve core is aligned with different discs to realize the adjustment of the pressure reduction coefficient; when the valve core moves upwards, the sleeve is finally driven to move, so that the interval between the discs is aligned with the sewage discharge groove, and fluid flows to the sewage discharge cavity through the interlayer flow channel and the sewage discharge groove, and self-cleaning is realized. The invention realizes self-cleaning of the regulating valve while realizing multi-stage depressurization, and greatly prolongs the service life and improves the service performance.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a self-cleaning multistage pressure reduction regulating valve.
Background
Regulating valves are commonly used in pipelines to regulate the flow of fluid in the pipeline. For the application occasions with larger difference of fluid pressure before and after adjustment, a multi-stage pressure reducing valve is usually adopted, and the fluid is gradually reduced in pressure by utilizing the multi-stage structure of a sleeve in the pressure reducing valve.
In the prior art, a sleeve of a multi-stage pressure reducing valve mainly has two structural forms, one is a structure that a plurality of coaxial sleeves are sleeved outside a valve core, a plurality of holes are arranged on each sleeve, and a plurality of layers of sleeves are overlapped to carry out multi-stage pressure reduction; the other is a labyrinth disk laminated structure, a multi-stage radial 90-degree bent flow channel is processed on the disk, and as shown in fig. 1, the resistance coefficient of the sleeve is improved through the multi-stage bent flow channel. The two existing multistage pressure reducing valves have the disadvantages that the size of a single through-flow hole or a single flow passage on a sleeve is small, the flow is circuitous and has more bending times in the flowing process, the through-flow hole or the flow passage has great blocking risks, once the blocking happens, the automatic clearing cannot be carried out, the performance of the valve is seriously reduced, and even the valve fails.
Disclosure of Invention
The applicant provides a rational-structure self-cleaning multistage depressurization regulating valve aiming at the defects in the prior art, so that self-cleaning during blockage of the regulating valve is realized while effective multistage depressurization is realized, the service performance of the regulating valve is greatly improved, and the service life of the regulating valve is greatly prolonged.
The technical scheme adopted by the invention is as follows:
a self-cleaning multistage depressurization regulating valve comprises a valve body with a hollow interior, wherein a sleeve is mounted on the inner bottom surface of the valve body, an interlayer is arranged in the valve body and positioned outside the outer circumferential surface of the sleeve, a sewage discharge cavity is formed between the interlayer and the inner wall surface of the valve body, and a sewage discharge groove is formed in the interlayer; the middle part of the sleeve is provided with a valve core;
the structure of the sleeve is as follows: the device comprises a plurality of layers of disks which are overlapped at intervals, wherein a plurality of through holes for fluid to flow are formed in each single disk;
the valve core drives the sleeve to move, so that the disks or the intervals among the disks are aligned with the sewage discharge groove.
As a further improvement of the above technical solution:
the single disc is of an annular structure, the inner circles of the discs form a valve core hole in the middle of the sleeve along the axial direction, and the valve core is positioned in the valve core hole and moves along the valve core hole; the diameter of the inner circle of the disc positioned at the top of the sleeve is smaller than that of the valve core, so that the movement of the valve core is axially limited.
The sectioning cross section of the valve body along the radial direction is of a structure in the shape of a Chinese character 'pin', and the sleeve is positioned in the middle of the bottom in the valve body; the inner space of the valve body positioned at the top of the sleeve forms a circulation cavity, and the inner space of the lower part of the valve body positioned outside the circumferential surface of the sleeve forms a sewage discharge cavity.
The bottom plate is arranged at the bottommost part of the multilayer disk, bolt holes are formed in the edge of the bottom plate and the edge of the multilayer disk, bolts penetrate through the bolt holes, and the bottom plate and the multilayer disk are sequentially sleeved on the bolts in a penetrating mode to form the multistage pressure reduction sleeve.
Bosses extend circumferentially at the edges of the individual disks and support and space adjacent disks to form inter-layer flow passages for fluid flow.
And a spring is arranged between the inner top surface of the valve body and the upper surface of the sleeve and is in a compression state and axially limits the sleeve.
The valve rod is installed through the top of the valve body, one end of the valve rod is located outside the valve body and connected with an external power mechanism, and the other end of the valve rod extends into the inside of the valve body and is provided with a valve core at the end.
The bottom of the valve body is provided with a first valve seat, and an inlet is formed through the first valve seat and the bottom of the valve body; and a second valve seat is arranged on the side surface of the valve body, and an outlet is formed by penetrating the second valve seat and the side wall of the valve body.
And a sewage discharge hole is formed in the side wall of the valve body, which is positioned beside the sewage discharge cavity, and the sewage discharge hole is used for communicating the sewage discharge cavity with the outside.
The through holes on the adjacent disks are arranged in a staggered manner; the sewage discharge grooves are arranged in one-to-one correspondence with the discs; the distance between the sewage discharge grooves is consistent with the interval between the adjacent discs.
The invention has the following beneficial effects:
the invention has compact and reasonable structure and convenient operation, and a plurality of fluid flowing through holes are arranged on a single disc through the sleeve of the multilayer disc structure, and the fluid flows through the through holes on the discs and the interlayer flow channels between the discs to generate friction with the discs, thereby causing energy loss and realizing the layer-by-layer pressure reduction of the regulating valve;
the valve rod drives the valve core to move, so that the bottom surface of the valve core is aligned with different discs, and fluid at an inlet enters the sleeve through channels among the disc layers with different numbers for pressure reduction, namely, the pressure reduction coefficient is adjusted through the movement of the valve core, and the adjustment is convenient and high in precision;
when the upper plane of the valve core is attached to the bottom surface of the top layer disk, the diameter of the inner circle of the top layer disk is smaller than that of the valve core, so that the upward force is applied to the top layer disk by the valve core in the upward moving process, the sleeve integrally moves upwards along with the valve core, the spring is pressed, the outer edge of an interlayer channel between adjacent disks is aligned with a sewage discharge groove in an interlayer, fluid scours the fluid channel in the flowing process to bring a blockage to a sewage discharge cavity, and the fluid flows out through the sewage discharge hole, the self-cleaning function of the regulating valve is realized, the blocking phenomenon of the regulating valve is greatly reduced or even avoided, and the service performance and the service life.
The invention also comprises the following advantages:
the spring is in a compressed state, and the compression elastic force of the spring axially acts on the sleeve, so that the sleeve is attached to the inner bottom surface of the valve body; during self-cleaning, the sleeve moves upwards under the action of the valve core, the spring is further compressed, and after the self-cleaning is finished, the sleeve is reset to the inner bottom surface of the valve body under the action of the spring;
the through holes on the adjacent disks are arranged in a staggered manner, so that the through holes on the adjacent disks are prevented from being opposite, the resistance of a fluid medium is increased while friction is generated between the fluid medium and the disks in the flowing process of the fluid, and the fluid medium is more assisted in effective pressure reduction.
Drawings
FIG. 1 is a schematic diagram of a disk structure of a conventional labyrinth-disk laminated-structure sleeve.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
FIG. 4 is a schematic view of the installation of the sleeve and the valve core of the present invention.
Fig. 5 is a schematic structural diagram of the bottom plate of the present invention.
FIG. 6 is a schematic diagram of a disk structure according to the present invention.
FIG. 7 is a schematic diagram of the multi-stage voltage reduction operation of the present invention.
Fig. 8 is a schematic diagram of the self-cleaning operation of the present invention.
Wherein: 1. a valve body; 2. a valve core; 3. a sleeve; 4. an interlayer; 5. a blowdown chamber; 6. a sewage draining groove; 7. a flow-through chamber; 8. a spring; 9. a valve stem; 10. a sewage draining hole; 11. a first valve seat; 12. a second valve seat; 13. an inlet; 14. an outlet; 15. a power mechanism; 31. a spool bore; 32. a disk; 33. a base plate; 34. bolt holes; 35. a through hole; 36. a boss; 50. and bending the flow channel.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 2 and 3, the self-cleaning multistage pressure-reducing regulating valve of the present embodiment includes a hollow valve body 1, a sleeve 3 is installed on the inner bottom surface of the valve body 1, an interlayer 4 is disposed in the valve body 1 outside the outer circumferential surface of the sleeve 3, a sewage discharge chamber 5 is formed between the interlayer 4 and the inner wall surface of the valve body 1, and a sewage discharge groove 6 is disposed on the interlayer 4; the middle part of the sleeve 3 is provided with a valve core 2;
the structure of the sleeve 3 is: the device comprises a plurality of layers of disks 32 which are overlapped at intervals, wherein a plurality of through holes 35 for fluid to flow are formed in each single disk 32;
the spool 2 moves the sleeve 3 so that the disks 32 or the spaces between the disks 32 are aligned with the dirt discharge grooves 6.
Through the sleeve 3 of the multilayer disc 32 structure, a plurality of fluid flowing through holes 35 are arranged on each disc 32, and fluid flows through the through holes 35 on each disc 32 and the interlayer flow channels between the discs 32 to generate friction with the discs 32, so that energy loss is caused, and the layer-by-layer pressure reduction of the regulating valve is realized;
when the sleeve 3 is driven by the valve core 2, the disk 32 on the sleeve 3 is aligned with the sewage discharge groove 6, namely the edge of the disk 32 blocks the sewage discharge groove 6, fluid cannot flow into the sewage discharge cavity 5, and the regulating valve is in a multi-stage pressure reduction working state;
when the sleeve 3 is driven by the valve core 2, the interlayer flow channel of the disc 32 on the sleeve 3 is aligned with the sewage draining groove 6, namely the sewage draining groove 6 is communicated with the interlayer flow channel, fluid sequentially passes through the interlayer flow channel and the sewage draining groove 6 to enter the sewage draining cavity 5, and the regulating valve is in a self-cleaning state at the moment.
As shown in fig. 4, each of the disks 32 is of an annular structure, the inner circles of the disks 32 form a valve core hole 31 in the middle of the sleeve 3 along the axial direction, and the valve core 2 is located in and moves along the valve core hole 31; the inner circle diameter of the disc 32 at the top of the sleeve 3 is smaller than the diameter of the spool 2, thereby axially limiting the movement of the spool 2.
When the upper plane of the valve core 2 is attached to the bottom surface of the top disc 32, the diameter of the inner circle of the top disc 32 is smaller than that of the valve core 2, so that the valve core 2 exerts upward force on the top disc 32 in the upward moving process, the sleeve 3 integrally moves upwards along with the valve core 2, the spring 8 is pressed, the outer edge of an interlayer channel between the adjacent discs 32 is aligned with the sewage discharge groove 6 on the interlayer 4, and therefore fluid scours the interlayer channel in the flowing process to bring a blockage to the sewage discharge cavity 5 and flows out through the sewage discharge hole 10, the self-cleaning function of the regulating valve is realized, the blocking phenomenon of the regulating valve is greatly reduced or even avoided, the service performance of the regulating valve is improved, and the service life of the regulating valve is.
The sectioning cross section of the valve body 1 along the radial direction is of a structure like a Chinese character 'pin', and the sleeve 3 is positioned in the middle of the bottom in the valve body 1; the inner space of the valve body 1 at the top of the sleeve 3 forms a circulation chamber 7, and the inner space at the lower part of the valve body 1 outside the circumferential surface of the sleeve 3 forms a sewage discharging chamber 5.
As shown in fig. 4, 5 and 6, a bottom plate 33 is installed at the bottommost portion of the multi-layer disk 32, bolt holes 34 are formed in the edge of the bottom plate 33 and the edge of the multi-layer disk 32, bolts penetrate through the bolt holes 34, and the bottom plate 33 and the multi-layer disk 32 are sequentially sleeved on the bolts to form the multi-stage pressure reducing sleeve 3.
The valve core 2 adopts a cylindrical structure, and the outer circular surface of the cylinder is in dynamic sealing fit with the valve core hole 31 in the sleeve 3 to form a piston type structure.
A spring 8 is arranged between the inner top surface of the valve body 1 and the upper surface of the sleeve 3, and the spring 8 is in a compressed state and axially limits the sleeve 3; the spring 8 is in a compressed state, and the compression elastic force of the spring acts on the sleeve 3 in the axial direction, so that the sleeve 3 is attached to the inner bottom surface of the valve body 1; during self-cleaning, the sleeve 3 moves upwards under the action of the valve core 2, the spring 8 is further compressed, and after the self-cleaning is finished, the sleeve 3 is reset to the inner bottom surface of the valve body 1 under the action of the spring 8.
The top of running through valve body 1 is installed valve rod 9, and valve rod 9 one end is located the outside of valve body 1 and is connected with external power unit 15, and the valve rod 9 other end stretches into inside the valve body 1 and installs case 2 at the end.
The bottom of the valve body 1 is provided with a first valve seat 11, and an inlet 13 is formed by penetrating the first valve seat 11 and the bottom of the valve body 1; and a second valve seat 12 is arranged on the side surface of the valve body 1, and an outlet 14 is arranged through the second valve seat 12 and the side wall of the valve body 1.
The side wall of the valve body 1, which is positioned beside the sewage discharging cavity 5, is provided with a sewage discharging hole 10, and the sewage discharging hole 10 communicates the sewage discharging cavity 5 with the outside.
The through holes 35 on the adjacent disks 32 are arranged in a staggered manner, so that the through holes 35 on the adjacent disks 32 are prevented from being over against, the resistance of a fluid medium is increased while friction is generated between the fluid medium and the disks 32 in the fluid flowing process, and the fluid medium is more assisted in effective pressure reduction; the sewage draining grooves 6 are arranged corresponding to the discs 32 one by one; the distance between the dirt discharge grooves 6 is the same as the distance between the adjacent disks 32.
The working principle of the invention is as follows:
the closing state of the pressure reducing valve:
under the drive of the valve rod 9, the valve core 2 moves to the bottommost part of the valve body 1, namely, when the bottom of the valve core 2 is level with the bottom plate 33 of the sleeve 3, fluid cannot flow into the valve body 1 through the sleeve 3 through the inlet 13, and at the moment, the pressure reducing valve is in a closed state.
Normal step-down working state:
as shown in fig. 7, under the action of the external power mechanism 15, the valve rod 9 drives the valve core 2 to move, so that the bottom surface of the valve core 2 is aligned with different discs 32, and in fig. 6, the valve core 2 is aligned with the third disc 32 below; the fluid entering from the inlet 13 flows into the sleeve 3 from the interlayer flow channels among the three lower disks 32, and flows upwards through the through holes 35 on the upper disks 32 and the interlayer flow channels in sequence, and energy loss is generated due to friction between the fluid and the disks 32, so that pressure reduction is realized;
the valve rod 9 drives the valve core 2 to move, so that the bottom surface of the valve core 2 is aligned with different discs 32, fluid at the inlet 13 enters the sleeve 3 through channels among layers of different numbers of discs 32 to be depressurized, and the depressurization coefficient can be adjusted through the movement of the valve core 2.
Blockage self-cleaning state:
closing the pipeline connected with the outlet 14 of the regulating valve and opening the external pipeline connected with the sewage draining hole 10;
as shown in fig. 8, under the action of the external power mechanism 15, the valve rod 9 drives the valve core 2 to move, when the upper plane of the valve core 2 is attached to the bottom surface of the top disk 32, because the diameter of the inner circle of the top disk 32 is smaller than that of the valve core 2, the valve core 2 exerts an upward force on the top disk 32 in the upward movement process, so that the sleeve 3 is integrally moved upward along with the valve core 2, the spring 8 is pressed, the outer edge of the fluid channel between adjacent disks 32 is aligned with the sewage discharge groove 6 on the partition layer 4, that is, the inlet 13 is communicated with the sewage discharge cavity 5 through the sleeve 3; the fluid washes the fluid channel in the flowing process, carries the blocking object to the sewage cavity 5 through the interlayer flow channel and flows out through the sewage discharge hole 10, and the self-cleaning function of the adjusting valve is realized.
The pressure regulating valve is simple and ingenious in structure, can realize effective multistage pressure reduction, and can automatically clean the pressure regulating valve, so that the service performance of the pressure regulating valve is greatly improved, and the service life of the pressure regulating valve is prolonged.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (8)
1. The utility model provides a multistage step-down governing valve of automatically cleaning which characterized in that: the valve comprises a valve body (1) with a hollow interior, wherein a sleeve (3) is arranged on the inner bottom surface of the valve body (1), an interlayer (4) is arranged in the valve body (1) positioned outside the outer circumferential surface of the sleeve (3), a sewage discharge cavity (5) is formed between the interlayer (4) and the inner wall surface of the valve body (1), and a sewage discharge groove (6) is formed in the interlayer (4); the middle part of the sleeve (3) is provided with a valve core (2);
the structure of the sleeve (3) is as follows: the device comprises a plurality of layers of disks (32) which are overlapped at intervals, wherein a plurality of through holes (35) for fluid to flow are formed in each single disk (32);
the valve core (2) drives the sleeve (3) to move, so that the discs (32) or the intervals among the discs (32) are aligned with the sewage discharge groove (6);
the single disc (32) is of an annular structure, the inner circles of the discs (32) form a valve core hole (31) in the middle of the sleeve (3) along the axial direction, and the valve core (2) is located in the valve core hole (31) and moves along the valve core hole; the diameter of the inner circle of the disc (32) positioned at the top of the sleeve (3) is smaller than that of the valve core (2), so that the valve core (2) is axially limited in movement;
the through holes (35) on the adjacent disks (32) are arranged in a staggered manner; the sewage discharge grooves (6) are arranged in one-to-one correspondence with the discs (32); the distance between the sewage discharge grooves (6) is consistent with the distance between the adjacent discs (32).
2. The self-cleaning, multi-stage pressure reducing regulator valve of claim 1, wherein: the sectioning cross section of the valve body (1) along the radial direction is of a structure in the shape of a Chinese character pin, and the sleeve (3) is positioned in the middle of the bottom in the valve body (1); the inner space of the valve body (1) positioned at the top of the sleeve (3) forms a circulation cavity (7), and the inner space of the lower part of the valve body (1) positioned outside the circumferential surface of the sleeve (3) forms a sewage discharge cavity (5).
3. The self-cleaning, multi-stage pressure reducing regulator valve of claim 1, wherein: the bottom plate (33) is arranged at the bottommost part of the multilayer disk (32), bolt holes (34) are formed in the edge of the bottom plate (33) and the edge of the multilayer disk (32), bolts penetrate through the bolt holes (34), and the bottom plate (33) and the multilayer disk (32) are sequentially sleeved on the bolts in a penetrating mode to form the multistage pressure reduction sleeve (3).
4. A self-cleaning multistage pressure reducing regulator valve as claimed in claim 1 or 3, characterized in that: bosses (36) extend circumferentially at each edge of a single disc (32), the bosses (36) supporting and spacing adjacent discs (32) to form inter-layer flow passages for fluid flow.
5. The self-cleaning, multi-stage pressure reducing regulator valve of claim 1, wherein: be located and install spring (8) between valve body (1) interior top surface and sleeve (3) upper surface, spring (8) are in compression state and carry out axial spacing to sleeve (3).
6. The self-cleaning, multi-stage pressure reducing regulator valve of claim 1, wherein: run through the top of valve body (1) and install valve rod (9), valve rod (9) one end is located the outside of valve body (1) and is connected with outside power unit (15), and valve rod (9) other end stretches into inside and install case (2) at the end of valve body (1).
7. The self-cleaning, multi-stage pressure reducing regulator valve of claim 1, wherein: a first valve seat (11) is installed at the bottom of the valve body (1), and an inlet (13) is formed in the position, which penetrates through the first valve seat (11) and the bottom of the valve body (1); and a second valve seat (12) is arranged on the side surface of the valve body (1), and an outlet (14) is arranged by penetrating through the second valve seat (12) and the side wall of the valve body (1).
8. The self-cleaning, multi-stage pressure reducing regulator valve of claim 1, wherein: a sewage draining hole (10) is formed in the side wall of the valve body (1) beside the sewage draining cavity (5), and the sewage draining cavity (5) is communicated with the outside through the sewage draining hole (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986310.8A CN110715109B (en) | 2019-10-17 | 2019-10-17 | Self-cleaning multi-stage pressure reduction regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986310.8A CN110715109B (en) | 2019-10-17 | 2019-10-17 | Self-cleaning multi-stage pressure reduction regulating valve |
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| Publication Number | Publication Date |
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| CN110715109A CN110715109A (en) | 2020-01-21 |
| CN110715109B true CN110715109B (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910986310.8A Active CN110715109B (en) | 2019-10-17 | 2019-10-17 | Self-cleaning multi-stage pressure reduction regulating valve |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113063026B (en) * | 2021-03-15 | 2022-11-22 | 瑞昌市金宇铜业制造有限公司 | Labyrinth type sleeve regulating valve |
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| US3732851A (en) * | 1971-05-26 | 1973-05-15 | R Self | Method of and device for conditioning steam |
| US3990475A (en) * | 1975-01-08 | 1976-11-09 | Honeywell Inc. | Low noise valve trim |
| DE2641761A1 (en) * | 1976-03-15 | 1977-09-22 | Crane Co | Spindle valve for compressed gas flow - has coaxial expansion bushes between bearing plate and seat ring to reduce decompression noise |
| JPS60196484A (en) * | 1984-03-19 | 1985-10-04 | Hayao Kabayama | High-pressure water switch valve |
| JP2779434B2 (en) * | 1994-03-24 | 1998-07-23 | 株式会社本山製作所 | Control valve cage and control valve |
| JPH09100945A (en) * | 1995-10-02 | 1997-04-15 | Nkk Corp | Cage type low noise adjusting valve |
| US6039076A (en) * | 1998-06-30 | 2000-03-21 | Copes-Vulcan, Inc. | High energy loss fluid control device |
| CN201241994Y (en) * | 2008-08-21 | 2009-05-20 | 中国石油天然气股份有限公司 | Sleeve type labyrinth structure of regulating valve layer |
| CN202901341U (en) * | 2012-09-17 | 2013-04-24 | 上海大通自控设备有限公司 | Self-cleaning structure of sleeve regulating valve |
| CN104061365A (en) * | 2014-06-04 | 2014-09-24 | 北京神州广安科技股份有限公司 | Self-cleaning valve |
| CN104857760A (en) * | 2015-04-28 | 2015-08-26 | 安庆市紫韵电子商务有限公司 | Full-automatic self-cleaning filter |
| CN106474800B (en) * | 2015-08-25 | 2019-03-15 | 华岁喜 | A kind of pressure balance self-cleaning filter |
| CN206309972U (en) * | 2016-12-19 | 2017-07-07 | 天津精通控制仪表技术有限公司 | A kind of Cascade Multistage decompression high-differential-pressure regulating valve |
| CN107654678A (en) * | 2017-11-03 | 2018-02-02 | 无锡斯考尔自动控制设备有限公司 | A kind of high-temperature molten salt regulating valve with self-cleaning function |
| CN207648157U (en) * | 2017-11-15 | 2018-07-24 | 四川长仪油气集输设备股份有限公司 | From cleaning multi-level throttle high temperature blowdown valve |
| CN108533828A (en) * | 2018-06-29 | 2018-09-14 | 华夏阀门有限公司 | A kind of labyrinth type disc and labyrinth adjusting valve |
| CN208519197U (en) * | 2018-07-24 | 2019-02-19 | 浙江力诺流体控制科技股份有限公司 | Variable diameter labyrinth multilevel decompression cage type regulating valve |
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2019
- 2019-10-17 CN CN201910986310.8A patent/CN110715109B/en active Active
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