CN110657251A - Series connection valve core double sealing surface multistage pressure reduction regulating valve - Google Patents
Series connection valve core double sealing surface multistage pressure reduction regulating valve Download PDFInfo
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- CN110657251A CN110657251A CN201910898882.0A CN201910898882A CN110657251A CN 110657251 A CN110657251 A CN 110657251A CN 201910898882 A CN201910898882 A CN 201910898882A CN 110657251 A CN110657251 A CN 110657251A
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- 238000007789 sealing Methods 0.000 title claims abstract description 53
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 23
- 230000009467 reduction Effects 0.000 title abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 57
- 230000000903 blocking effect Effects 0.000 claims description 27
- 238000000926 separation method Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 45
- 238000005516 engineering process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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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
- F16K1/36—Valve members
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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
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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
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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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
Abstract
The invention discloses a series valve core double sealing surface multistage depressurization regulating valve which comprises a valve body, an upper valve cover and a valve rod, wherein the valve body is provided with a valve body inner cavity, a fluid inlet and a fluid outlet which are communicated with the valve body inner cavity; a valve seat is arranged in the inner cavity of the valve body, the valve seat is of a cavity structure, and a first through hole is formed in the side wall of the valve seat; an outer valve core, an inner sleeve and an outer sleeve are sequentially arranged outside the valve seat; a second through hole is formed in the side wall of the inner-layer sleeve, a third through hole is formed in the side wall of the outer-layer sleeve, and the second through hole, the first through hole and the third through hole are not in the same horizontal line; the valve rod penetrates through the upper valve cover, an inner-layer valve core and a check ring are arranged at the bottom of the upper valve cover, an annular limiting block is arranged below the check ring, and the inner-layer valve core is positioned in the valve seat; the outer valve core is fixed on the upper end face of the inner valve core and is embedded at the bottom of the valve rod; a belleville spring is arranged between the upper end face of the outer-layer valve core and the annular limiting block. Has the advantages that: by adopting a flow-off type multi-layer sleeve pressure reduction structure, the bubble-level sealing is realized, the process fluid can be accurately regulated, and the service life of the device is prolonged.
Description
Technical Field
The technology belongs to the field of industrial process control valves, and particularly relates to a series valve core double-sealing surface multistage pressure reduction regulating valve.
Background
The sleeve regulating valve is a terminal element for industrial process control, is commonly used for regulating parameters such as fluid flow, temperature, pressure and the like in a control system, and is particularly suitable for occasions with large unbalanced force and large pressure drop at two ends. For a common sleeve regulating valve, a large pressure drop is formed when fluid flows out through a throttling port, bubbles are generated inside the fluid when the pressure drops below saturated steam pressure to form two-phase flow, when the fluid continuously passes through the valve, the pressure is slowly restored to the pressure behind the valve, the bubbles are broken at the moment, cavitation is generated, huge impact is formed on valve internals, violent vibration is generated, the sealing surface of the valve is damaged, sealing is difficult, and the service life of the valve is greatly reduced. In order to avoid cavitation, a multi-stage pressure reduction regulating valve is usually adopted to distribute huge pressure reduction to each stage of channel, so that the flow velocity in the fluid channel is effectively controlled, the scouring is reduced, and the service life of the valve is prolonged.
The traditional multistage pressure reduction regulating valve mostly adopts labyrinth disc formula, multilayer telescopic or cascade case to control fluid speed and pressure, but all is the structure that adopts single case, and the sealed face of case directly faces the washing away of upper reaches medium fluid, and in case the medium does not totally exist the particulate matter, sealed face just has very big washing away, causes sealed phenomenon such as not tight leakage, and life shortens, influences the safe operation of production, simultaneously also greatly increased maintenance and running cost.
Disclosure of Invention
The technology aims to overcome the defects of large leakage amount, low control precision and poor sealing of a sleeve regulating valve in the prior art, and provides a pressure reduction structure adopting a flow-off type multilayer sleeve, which can ensure sealing to realize bubble-level sealing and accurately regulate process fluid. The technical scheme is as follows:
a series valve core double sealing surface multistage pressure reduction regulating valve comprises a valve body, an upper valve cover and a valve rod, wherein the valve body is provided with a valve body inner cavity, a fluid inlet and a fluid outlet which are communicated with the valve body inner cavity; a valve seat is arranged in the inner cavity of the valve body, the valve seat is of a cavity structure and is communicated with the fluid outlet, and a first through hole is formed in the side wall of the valve seat; an outer valve core, an inner sleeve and an outer sleeve are sequentially arranged outside the valve seat; a second through hole is formed in the side wall of the inner-layer sleeve, a third through hole is formed in the side wall of the outer-layer sleeve, and the second through hole, the first through hole and the third through hole are not in the same horizontal line; the valve rod penetrates through the upper valve cover, an inner-layer valve core and a check ring are arranged at the bottom of the upper valve cover, an annular limiting block is arranged below the check ring, and the inner-layer valve core is positioned in the valve seat; the outer valve core is fixed on the upper end face of the inner valve core and is embedded at the bottom of the valve rod; a belleville spring is arranged between the upper end face of the outer-layer valve core and the annular limiting block.
Preferably, at least two annular inner blocking pieces are arranged in the inner-layer sleeve, the through hole II is positioned between the annular inner blocking pieces, annular outer blocking pieces are arranged on the outer side wall of the inner-layer sleeve and at the same horizontal line position with the annular inner blocking pieces, each annular outer blocking piece comprises an annular outer blocking piece I and an annular outer blocking piece II, and the annular outer blocking pieces I and the annular outer blocking pieces II are different in diameter and distributed at intervals; the number of the annular outer blocking pieces is not less than two, and the annular outer blocking pieces are in close contact with the outer sleeve.
Preferably, the valve seat is of a stepped structure, the positions of the bottom of the outer-layer valve core and the stepped structure of the valve seat are chamfered, and the bottom of the outer-layer valve core and the stepped structure of the valve seat are complementary chamfers; the cavity structure of the valve seat comprises a sliding cavity and a fluid cavity, and the inner-layer valve core can slide up and down along the sliding cavity; the outer side wall of the bottom of the sliding cavity is provided with a groove.
Preferably, the inner cavity of the valve cover is of a stepped cylindrical structure gradually enlarged from top to bottom and comprises a guide sliding cavity, a guide protection cavity and a guide limiting cavity, and the outer-layer valve core can slide along the inner side wall of the guide limiting cavity.
Preferably, the fluid chamber is in communication with the fluid outlet, and a valve body bushing is disposed between the valve seat and the fluid outlet.
Preferably, a filler is arranged between the inner side wall of the upper valve cover and the guide moving cavity, a pressing plate is arranged at the top of the upper valve cover, and the pressing plate is fixedly connected with the upper valve cover through bolts.
Preferably, a sealing gasket is arranged between the valve body and the valve seat; a sealing gasket is arranged between the valve body and the outer sleeve; a sealing gasket is arranged between the upper valve cover and the inner sleeve.
Preferably, the fluid outlet is a hardened venturi tube.
Preferably, the valve body and the upper valve cover are made of F11 or F22 materials; the surfaces of the valve core, the valve seat, the inner layer sleeve, the outer layer sleeve, the inner layer valve core and the outer layer valve core are all hardened.
Preferably, the valve rod and the inner-layer valve core are of an integral structure.
Compared with the prior art, the technology has the advantages that:
1. the valve core is changed from a traditional single valve core into a series connection double valve core, the sealing surface of the outer layer valve core is not directly opposite to the washing of fluid in the valve opening and closing process, and the sealing mainly depends on the primary sealing surface between the inner layer valve core and the valve seat, so that the sealing can be ensured to realize bubble-level sealing, the process fluid can be accurately regulated, and the service life is greatly prolonged.
2. The inner sleeve, the outer sleeve and the valve seat realize a flow-off type multi-layer sleeve pressure reduction structure, and the valve is closed more and more tightly by the pressure of medium fluid when closed, so that the sealing performance is ensured.
3. The inner sleeve, the outer sleeve and the valve seat form a three-level pressure reduction fluid channel, and when fluid passes through the expanding multi-level pressure reduction channel, a series of pressure reduction means such as compression, flow division, confluence, expansion and the like can achieve the pressure reduction and anti-cavitation effects better than a single-layer drilling sleeve, and can effectively control the flow rate of the valve internals and prolong the service life.
4. The series valve core is always guided by the full-stroke sleeve in the valve opening and closing process, the concentricity is good, the motion is stable, and the left and right vibration is not easy to be generated by the influence of fluid unbalanced force.
Drawings
FIG. 1 is a cross-sectional view of the structure of the present invention;
FIG. 2 is a schematic view of the outer sleeve construction;
FIG. 3 is a schematic view of the inner sleeve construction;
FIG. 4 is a schematic view of a valve seat structure;
fig. 5 is a partially enlarged view of fig. 1.
The labels in the figure are: 1-a valve body; 101-valve body inner cavity; 2-upper valve cover; 201-a guide limit cavity; 202-a guide protection cavity; 203-a guide moving cavity; 3-a valve stem; 4-a bolt; 5-inner layer valve core; 6-valve seat; 61-a first through hole; 62-a stepped structure; 63-grooves; 64-a sliding cavity; 65-a fluid chamber; 7-an annular limiting block; 8-a gasket; 9-inner sleeve; 91-annular outer baffle I; 92-a second annular outer baffle plate; 93-through hole two; 94-ring-shaped inner baffle plate; 10-an outer sleeve; 1001-Via three; 11-a retainer ring; 12-a pin; 13-a belleville spring; 14-a filler; 15-outer layer valve core; 16-a valve body bushing; 17-a platen; 18-a fluid inlet; 19-a fluid outlet; a-a fluid conditioning zone; b-primary seal face; c-secondary seal face.
Detailed Description
The following further description of the technology, in conjunction with the accompanying figures 1-5 and specific examples, is provided to assist in understanding the present invention.
A series valve core double sealing surface multistage pressure reduction regulating valve comprises a valve body 1, an upper valve cover 2 and a valve rod 3, wherein the valve body 1 is provided with a valve body inner cavity 101, and a fluid inlet 18 and a fluid outlet 19 which are communicated with the valve body inner cavity 101; a valve seat 6 is arranged in the inner cavity 101 of the valve body, the valve seat 6 is of a cavity structure and is communicated with the fluid outlet 19, and a first through hole 61 is formed in the side wall of the valve seat 6; an outer-layer valve core 15, an inner-layer sleeve 9 and an outer-layer sleeve 10 are sequentially arranged outside the valve seat 6; a second through hole 93 is formed in the side wall of the inner sleeve 9, a third through hole 1001 is formed in the side wall of the outer sleeve 10, and the second through hole 93, the first through hole 61 and the third through hole 1001 are not on the same horizontal line; the valve rod 3 penetrates through the upper valve cover 2, an inner-layer valve core 5 and a check ring 11 are fixedly installed at the bottom, and the inner-layer valve core 5 is positioned in the valve seat 6; the outer-layer valve core 15 is fixed on the upper end face of the inner-layer valve core 5 and is embedded at the bottom of the valve rod 3; a belleville spring 13 is arranged between the upper end face of the outer valve core 15 and the check ring 11, the valve body 1 and the upper valve cover 3 are fixedly connected through a bolt 4, the inner sleeve 9 and the outer sleeve 10 are fixedly connected through a pin 12, an annular limiting block 7 is arranged below the check ring 11, and one end of the belleville spring 13 is fixed on the annular limiting block 7.
In order to facilitate processing, use and maintenance, the valve rod 3 and the inner-layer valve core 5 are of an integral structure.
In order to better realize pressure reduction and prolong the service life of the valve, at least two annular inner blocking pieces 94 are arranged in the inner layer sleeve 5, the through hole II 93 is positioned between the annular inner blocking pieces 94, the outer side wall of the inner layer sleeve 9 and the annular inner blocking pieces 94 are provided with annular outer blocking pieces at the same horizontal line, the annular outer blocking pieces comprise annular outer blocking pieces I91 and annular outer blocking pieces II 92, and the annular outer blocking pieces I91 and the annular outer blocking pieces II 92 have different diameters and are distributed at intervals; the number of the annular outer blocking pieces is not less than two, the second annular outer blocking piece 92 is in close contact with the outer sleeve 10, the number of the annular inner blocking pieces 94 is four, and the first annular outer blocking piece 91 and the second annular outer blocking piece 92 are two respectively, as shown in fig. 3. The number of the annular inner separation blades and the annular outer separation blades can be increased or decreased according to actual requirements, and the best implementation mode is provided in the embodiment.
In order to adjust the flow, the diameters of the first through holes 61 are the same, the number of the first through holes is gradually increased from bottom to top, the number of the lowest layers in the embodiment is two, and the number of the lowest layers is two, four and four upwards in sequence; the diameters of the second through holes 93 are the same, the number of the second through holes is gradually increased from bottom to top, and in the embodiment, the number of the lowest layers is two, and four, six and six are arranged in sequence from top to bottom; the diameter of the third through hole 1001 is gradually increased from bottom to top, the number of each row is eight, and similarly, the diameters and the numbers of the first through hole, the second through hole and the third through hole can be adjusted according to actual requirements, and the best scheme is provided in the embodiment.
The bottom chamfer of the inner spool 5 extends into the fluid chamber 65 of the valve seat 6 and makes intimate contact therewith to form a primary sealing surface B against which the seal is primarily seated, as shown in fig. 4 and 5.
As shown in fig. 1 and 4, the valve seat 6 is of a stepped structure, the positions of the bottom of the outer-layer valve core 15 and the stepped structure 62 of the valve seat 6 are chamfered, and the chamfers are complementary; the cavity structure of the valve seat 6 comprises a sliding cavity 64 and a fluid cavity 65, and the inner layer valve core 5 can slide up and down along the sliding cavity 64; the outer side wall of the bottom of the sliding cavity 64 is provided with a groove 63, so that the damage of cavitation to a sealing surface in a small opening degree is avoided. The inner sleeve 9, the valve seat 6 and the outer valve core 15 form a fluid adjusting area A, the outer valve core 15 and the stepped structure 62 of the valve seat 6 form a second-stage sealing surface C, the second-stage sealing surface C is not directly subjected to scouring on fluid in the valve opening and closing process, and the service life of the valve is prolonged.
The inner cavity 21 of the valve cover is a stepped cylindrical structure gradually enlarged from top to bottom, and comprises a guide sliding cavity 203, a guide protection cavity 202 and a guide limiting cavity 201, and the outer-layer valve core 15 can slide along the inner side wall of the guide limiting cavity 201. The series valve core is always guided by the full-stroke sleeve in the valve opening and closing process, the concentricity is good, the motion is stable, and the left and right vibration is not easy to be generated by the influence of fluid unbalanced force.
The fluid chamber 65 communicates with the fluid outlet 19, and a valve body bushing 16 is provided between the valve seat 6 and the fluid outlet 19, the fluid outlet 19 preferably being a hardened venturi tube.
In order to enhance the sealing effect, a sealing gasket 8 is arranged between the valve body 1 and the valve seat 6; a sealing gasket 8 is arranged between the valve body 1 and the outer sleeve 10; a sealing gasket 8 is arranged between the upper valve cover 2 and the inner sleeve 9.
The valve body 1 and the upper valve cover 3 are made of F11 or F22 materials; the surfaces of the valve seat 6, the inner layer sleeve 9, the outer layer sleeve 10, the inner layer valve core 5 and the outer layer valve core 15 are all hardened.
The working principle is as follows:
fluid enters the inner cavity 101 of the valve body through the fluid inlet 18, because of large pressure difference, the acting force of the fluid can impact on the outer sleeve 10 and then enters the inner sleeve 9 through the third through hole 1001, when the valve is not opened, the fluid can block the periphery of the outer valve core 15, the inner valve core 5 plays a double-insurance effect, the primary sealing surface B and the secondary sealing surface C are both in a coated state, when the valve is gradually opened, the fluid passes through the fluid adjusting area A and the secondary sealing surface B and enters the primary sealing surface C which is already separated through the third through hole 1001 through the second through hole 93, leaves the inner cavity 101 of the valve body and flows out of the valve body 1 through the fluid outlet 19, in the flowing process of the fluid, the multi-stage pressure reduction of the outer sleeve 10, the inner sleeve 9 and the valve seat 6 is firstly carried out, the multi-stage loss of the pressure is realized, and then the adjustment and the switching of the double-sealing surfaces are carried, the control of high-flow-rate media is realized through the first through hole 61, the second through hole 93 and the third through hole 1001, and in the control process, the sealing surface is well protected through the special design of the position of the double sealing surfaces, so that the product can effectively run for a long time. When the valve is closed, the outer valve core 15 is closed in place, then the butterfly spring 13 is compressed by the thrust of the actuating mechanism to close the inner valve core 5, and the double-layer sealing surface ensures sealing to realize bubble-level sealing. When the valve is opened, the inner-layer valve core 5 is firstly opened, the outer-layer valve core 15 is opened again due to the existence of the pretightening force of the disc spring 13, and the valve seat is provided with the groove 63, so that the damage of cavitation to a sealing surface in small opening is avoided, and meanwhile, the outer-layer valve core 15 participates in adjustment when being opened, so that no dead adjusting area caused by the existence of clearance flow exists, and the adjustment precision of the valve is greatly improved.
Of course, the above description is not intended to limit the present technology, and the present technology is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a multistage step-down governing valve of series connection case double containment face which characterized in that: the valve comprises a valve body, an upper valve cover and a valve rod, wherein the valve body is provided with a valve body inner cavity, and a fluid inlet and a fluid outlet which are communicated with the valve body inner cavity; a valve seat is arranged in the inner cavity of the valve body, a cavity structure is arranged in the valve seat and is communicated with the fluid outlet, and a first through hole is formed in the side wall of the valve seat; an outer valve core, an inner sleeve and an outer sleeve are sequentially arranged outside the valve seat; a second through hole is formed in the side wall of the inner-layer sleeve, a third through hole is formed in the side wall of the outer-layer sleeve, and the second through hole is not on the same horizontal line with the first through hole and the third through hole; the valve rod penetrates through the upper valve cover, an inner-layer valve core and a check ring are arranged at the bottom of the valve rod, an annular limiting block is arranged below the check ring, and the inner-layer valve core is positioned in the valve seat; the outer-layer valve core is fixed on the upper end face of the inner-layer valve core and is nested at the bottom of the valve rod; and a belleville spring is arranged between the upper end surface of the outer-layer valve core and the annular limiting block.
2. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: at least two annular inner separation blades are arranged in the inner sleeve, a through hole II is positioned between the annular inner separation blades, annular outer separation blades are arranged on the outer side wall of the inner sleeve and at the same horizontal line with the annular inner separation blades, each annular outer separation blade comprises an annular outer separation blade I and an annular outer separation blade II, and the annular outer separation blades I and the annular outer separation blades II have different diameters and are distributed at intervals; the number of the annular outer blocking pieces is not less than two, and the annular outer blocking pieces are in close contact with the outer sleeve.
3. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: the valve seat is of a stepped structure, the positions of the bottom of the outer-layer valve core and the stepped structure of the valve seat are chamfered, and the bottom of the outer-layer valve core and the stepped structure of the valve seat are complementary chamfers; the cavity structure of the valve seat comprises a sliding cavity and a fluid cavity, and the inner-layer valve core can slide up and down along the sliding cavity; and a groove is arranged on the outer side wall of the bottom of the sliding cavity.
4. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: the inner cavity of the valve cover is of a stepped cylindrical structure which gradually increases from top to bottom and comprises a guide sliding cavity, a guide protection cavity and a guide limiting cavity, and the outer-layer valve core can slide along the inner side wall of the guide limiting cavity.
5. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 3, wherein: the fluid cavity is communicated with the fluid outlet, and a valve body bushing is arranged between the valve seat and the fluid outlet.
6. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: and a filler is arranged between the inner side wall of the upper valve cover and the guide moving cavity, a pressing plate is arranged at the top of the upper valve cover, and the pressing plate is fixedly connected with the upper valve cover through a bolt.
7. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: a sealing gasket is arranged between the valve body and the valve seat; a sealing gasket is arranged between the valve body and the outer sleeve; and a sealing gasket is arranged between the upper valve cover and the inner sleeve.
8. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: the fluid outlet employs a hardened venturi.
9. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: the valve body and the upper valve cover are made of F11 or F22 materials; the surfaces of the valve core, the valve seat, the inner layer sleeve, the outer layer sleeve, the inner layer valve core and the outer layer valve core are all subjected to hardening treatment.
10. The multi-stage pressure reducing regulating valve with the series valve cores and the double sealing surfaces as claimed in claim 1, wherein: the valve rod and the inner-layer valve core are of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898882.0A CN110657251A (en) | 2019-09-23 | 2019-09-23 | Series connection valve core double sealing surface multistage pressure reduction regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898882.0A CN110657251A (en) | 2019-09-23 | 2019-09-23 | Series connection valve core double sealing surface multistage pressure reduction regulating valve |
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| Publication Number | Publication Date |
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| CN110657251A true CN110657251A (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910898882.0A Pending CN110657251A (en) | 2019-09-23 | 2019-09-23 | Series connection valve core double sealing surface multistage pressure reduction regulating valve |
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| CN (1) | CN110657251A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810649A (en) * | 2020-07-25 | 2020-10-23 | 浙江中德自控科技股份有限公司 | Noise-reducing impurity-removing pressure-reducing regulating valve |
| CN114617453A (en) * | 2021-04-21 | 2022-06-14 | 九阳股份有限公司 | Food processing machine |
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| CN210890160U (en) * | 2019-09-23 | 2020-06-30 | 山东菲特自控阀门制造有限公司 | Series connection valve core double sealing surface multistage pressure reduction regulating valve |
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2019
- 2019-09-23 CN CN201910898882.0A patent/CN110657251A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202195155U (en) * | 2011-07-28 | 2012-04-18 | 陈月标 | Integrated minimum flow regulating valve |
| CN202769030U (en) * | 2012-08-29 | 2013-03-06 | 江阴万讯自控设备有限公司 | High pressure difference classification protection type adjusting valve |
| CN205824224U (en) * | 2016-07-28 | 2016-12-21 | 自贡自高阀门有限公司 | A kind of flow control valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810649A (en) * | 2020-07-25 | 2020-10-23 | 浙江中德自控科技股份有限公司 | Noise-reducing impurity-removing pressure-reducing regulating valve |
| CN111810649B (en) * | 2020-07-25 | 2022-02-11 | 浙江中德自控科技股份有限公司 | Noise-reducing impurity-removing pressure-reducing regulating valve |
| CN114617453A (en) * | 2021-04-21 | 2022-06-14 | 九阳股份有限公司 | Food processing machine |
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