CN113236801A - Anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type and flow regulating method thereof - Google Patents
Anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type and flow regulating method thereof Download PDFInfo
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- CN113236801A CN113236801A CN202110542928.2A CN202110542928A CN113236801A CN 113236801 A CN113236801 A CN 113236801A CN 202110542928 A CN202110542928 A CN 202110542928A CN 113236801 A CN113236801 A CN 113236801A
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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
- F16K1/36—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
- F16K1/52—Means for additional adjustment of the rate of flow
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to an anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type, which comprises a valve body; the staggered opening and closing structure comprises a valve cover and a valve rod which are arranged in a valve body, a plurality of throttling windows are arranged on a valve cage, the valve clack is matched with a medium in a flow channel along with the ascending and descending of the valve rod so as to enable the lower side end of an upper adjusting pair to be matched with the throttling windows, the outer wall of the lower end of the lower sealing pair of the valve clack is provided with a sealing surface A matched with a valve seat in a sealing mode, the inner wall of the upper end of the valve seat is provided with a sealing surface B matched with the sealing surface A, and the outer wall of the upper adjusting pair is provided with a plurality of flow balance holes. The invention has the following advantages: through the structure form that seals and flow control stagger between valve clack, valve cage and disk seat, avoid the medium to sealed face erode, thereby balanced cage cover internal pressure guarantees the stationarity of valve rod oscilaltion operation simultaneously.
Description
The technical field is as follows:
the invention belongs to the field of regulating valves, and particularly relates to an anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type.
Background art:
in the automatic control of modern electric and chemical industries, where the production depends on the correct distribution and control of the flowing medium, the regulating valves are subjected to more severe operating conditions than other components, such as temperature, pressure, corrosion and pollution, which however, when controlling the flow of the process fluid, require stable operation and minimum maintenance. The small-flow and high-pressure-difference regulating valve is applied more in the power station or petroleum field, and because the sealing surface of the valve body is subjected to flash evaporation and cavitation under the working environment with high pressure difference and small flow, the service life is short, and the normal operation of equipment is seriously influenced.
An isolated regulating valve of patent No. 201320175100.9, in a built-in packing gland type high pressure stop valve of patent No. 201320175146.0, a valve clack (valve core) at the lower end of a valve rod is in sealing fit with a valve seat, the lower end of the valve clack is a sealing surface A, the upper end of the valve seat is a sealing surface B, the valve rod enables the sealing surface A of the valve clack at the lower end of the valve rod to be in sealing fit with the sealing surface B of the valve seat along with the downward driving of an actuator, the communication with a medium inlet and a medium outlet of a valve body is blocked, the sealing surface A of the valve clack at the lower end of the valve rod is separated from the sealing surface B along with the upward driving of the actuator, the covering of the throttling area of the valve seat is gradually cancelled through the ascending of the valve clack, so that a medium is discharged to the medium outlet through the medium inlet and the throttling window, therefore, the opening and closing of medium circulation and flow regulation depend on the lower end of the valve clack, the medium is throttled when discharged to the medium outlet through the valve seat, the medium, the relative flow rate is fast, the scouring of the sealing surface A and the sealing surface B is extremely large, so that the sealing surface A and the sealing surface B are blown, and the high-pressure regulating valve is opened and closed for a plurality of times for a long time, so that the sealing property between the sealing surface A and the sealing surface B is influenced, and the service life and the normal operation of the high-pressure regulating valve are further influenced.
Secondly, the pressure of the medium is extremely high when the medium flows to the valve cage, once the medium flows to the inner upper end of the valve cage through a gap between the valve clack and the valve cage, because the volume modulus of the working medium is large enough, the extremely small volume can generate extremely high pressure to the upper end of the valve clack, and because the medium is throttled, the lower end of the valve clack generates relatively small pressure, so that larger pressure difference occurs at the upper end and the lower end of the valve clack, the valve rod fluctuates up and down in the opening and closing process, and the stability of normal lifting of the valve rod is influenced.
The invention content is as follows:
the invention aims to overcome the defects and provide the anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type.
The purpose of the invention is realized by the following technical scheme: an anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type comprises
The valve body is internally provided with a flow passage for medium circulation, and the valve body is also internally provided with a medium inlet and a medium outlet which are communicated with the flow passage;
the staggered opening and closing structure comprises a valve cover and a valve rod which are arranged in a valve body, the lower end of the valve rod is arranged in a flow channel, the lower end of the valve rod is connected with a valve clack, the valve clack consists of an upper adjusting pair and a lower sealing pair, the valve clack is of a T-shaped structure with the upper part wide and the lower part narrow, a valve cage and a valve seat which are distributed up and down are arranged in the flow channel, a winding gasket is arranged between the valve body and the valve seat, the valve clack is arranged in the valve cage, a plurality of throttling windows are arranged on the valve cage, the upper adjusting pair of the valve clack is attached to the inner wall of the valve cage, the lower side end of the upper adjusting pair is matched with the throttling windows along with the up-down lifting of the valve rod so as to adjust the flow of a medium in the flow channel, the outer wall of the lower end of the lower sealing pair of the valve clack is provided with a sealing surface A which is in sealing fit with the valve seat, the inner wall of the upper end of the valve seat is provided with a sealing surface B, the outer wall of the upper adjusting pair is provided with a plurality of flow balancing holes, the flow balance holes are arranged from top to bottom;
the driving structure comprises an actuator which is arranged at the upper end of the valve rod and drives the valve rod to lift up and down, and the actuator is connected with an actuator support;
the sealing structure comprises a cavity between a valve rod and a valve cover and a filler arranged in the cavity, and further comprises a cavity between the valve cover and the valve body, a sealing gasket ring and a sealing gasket ring arranged in the cavity, wherein the sealing gasket ring is arranged above the sealing gasket, the sealing gasket ring and the sealing gasket ring are pre-compressed by screwing a pressing disc and threads on the inner wall of the valve body in the cavity, a plurality of pressing screws distributed in an equal circumference are arranged on the pressing disc, the pressing screws completely compress the sealing gasket ring, the sealing gasket, the valve cover, the cage, the valve seat and the winding gasket, and the filler compresses the filler through the filler gland.
The invention is further improved in that: the throttling window adopts a parabolic, equal-percentage, straight-line, quick-opening and multi-combination flow characteristic curved surface linear structure.
The invention is further improved in that: the plurality of throttling windows are uniformly distributed in the radial center of the valve cage.
The invention is further improved in that: the sealing surface A of the lower sealing pair of the valve clack is a conical guide surface.
The invention is further improved in that: the valve rod is sleeved with a sealing ring on the outer circumference of the upper end face of the valve clack, and the sealing ring is tightly attached to the inner wall of the valve cage.
The invention is further improved in that: the outer circumference threaded connection of valve gap has the bolt clamp plate, realizes balanced fastening through a plurality of stud between the outside of gland and the bolt clamp plate, and the position cover that the gland upper end was arranged in to the stud is equipped with the nut, has tension compensation piece between the lower terminal surface of nut and the upper end of gland.
When a valve rod descends, a sealing surface A and a sealing surface B of a valve clack are tightly attached and sealed, meanwhile, the outer wall of an upper adjusting pair of the valve clack covers a plurality of throttling windows on a valve cage, so that a flow channel, a medium inlet and a medium outlet are closed, when the valve rod ascends, the sealing surface A and the sealing surface B of the valve clack are separated, meanwhile, the outer wall of the upper adjusting pair of the valve clack moves upwards, and the medium flow is adjusted through the size of the throttling area between the outer wall of the lower end of the upper adjusting pair and the throttling windows.
Compared with the prior art, the invention has the following advantages:
1. in the staggered opening and closing structure, the valve clack adopts a T-shaped structure of an upper adjusting pair and a lower sealing pair, a sealing surface A of the lower sealing pair is mutually sealed and attached with a sealing surface B of a valve seat to realize the closing of a flow channel and a medium outlet, and the area of the outer side of the lower end of the upper adjusting pair and a throttling window of a valve cage is adjusted to realize the adjustment of medium flow, so that the flushing damage of the sealing surface A and the sealing surface B by a medium is avoided through the structural form that the sealing and the flow adjustment between the valve clack, the valve cage and the valve seat are staggered.
2. When the medium passes through the throttling window along with the rising of the valve clack and is discharged to the medium outlet, the pressure generated by the medium passing through the throttling window can not scour the sealing surface A of the lower sealing pair of the valve clack, and even if scouring damage is generated on the outer side of the lower end of the upper adjusting pair, the sealing property between the valve seat and the valve clack can not be influenced, so that the sealing and flow adjusting staggered structural form ensures the sealing property and the adjusting property of the high-pressure adjusting valve.
3. According to the invention, a sealing gasket ring and a sealing gasket are arranged in a cavity between a valve body and a valve cover to seal and separate media in a valve cage and a flow channel, the sealing gasket ring and the sealing gasket are pre-pressed with the cavity through a pressing disc, and the sealing gasket ring, the sealing gasket, the valve cover, a cage, a valve seat and a winding gasket are completely pressed by a plurality of pressing screws distributed on the pressing disc in an equal circumference manner; secondly, packing is arranged in a cavity between the valve rod and the valve cover and is compressed through the packing gland and the stud bolts, so that leakage of media caused by the vertical lifting of the valve rod is avoided, a uniform integral structure is formed by the mutual connection among the compressing disc, the valve cover, the packing gland and the actuator support, and the sealing gasket ring, the sealing gasket, the valve cover, the cage, the valve seat and the winding gasket are compressed integrally; the high-stability integral locking among the pressing disc, the valve cover, the valve body, the packing gland and the actuator bracket improves the service life and the service performance of the regulating valve with high pressure difference and small flow.
Description of the drawings:
fig. 1 is a structural schematic diagram of an anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type according to the invention.
FIG. 2 is a schematic diagram of the connection of the cage, the flap, and the valve seat of the staggered opening and closing structure of FIG. 1.
Fig. 3 is a schematic structural diagram of the throttle window in fig. 1.
Fig. 4 is a schematic view of the valve flap of fig. 1.
Reference numbers in the figures:
1-valve body, 2-staggered opening and closing structure, 3-driving structure and 4-sealing structure;
11-flow channel, 12-medium inlet, 13-medium outlet;
21-valve cover, 22-valve rod, 23-valve clack, 231-upper adjusting pair, 232-lower sealing pair, 24-valve cage, 25-valve seat, 26-throttling window, 27-sealing surface A, 28-sealing surface B, 29-sealing ring, 210-flow balancing hole and 211-winding gasket;
31-actuator, 32-actuator holder;
41-chamber, 42-packing, 43-cavity, 44-sealing gasket ring, 45-sealing gasket, 46-pressing cover and 47-packing gland; 48-bolt pressure plate, 410-stud bolt, 411-nut, 412-tension compensation piece and 50-compression screw.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship, such as one based on the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the structure or unit indicated must have a specific orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise specified and limited, terms such as "connected," "provided," "having," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, or directly connected, and may be connected through an intermediate medium, so that those skilled in the art can understand the basic meaning of the above terms in the present invention according to specific situations.
FIG. 1 shows an embodiment of the invention for realizing a staggered type anti-scouring high-pressure regulating valve for sealing and regulating, which comprises
The valve body 1 is provided with a flow passage 11 for medium circulation in the valve body 1, and the valve body 1 is also provided with a medium inlet 12 and a medium outlet 13 which are communicated with the flow passage 11;
a staggered opening and closing structure 2, as shown in fig. 2, the staggered opening and closing structure 2 comprises a valve cover 21 and a valve rod 22 which are arranged in a valve body 1, the lower end of the valve rod 22 is arranged in a flow channel 11, and the lower end of the valve rod 22 is connected with a valve clack 23, as shown in fig. 4, the valve clack 23 is composed of an upper adjusting pair 231 and a lower sealing pair 232, the valve clack 23 is a T-shaped structure with a wide upper part and a narrow lower part, a valve cage 24 and a valve seat 25 which are distributed up and down are arranged in the flow channel 11, a winding gasket 211 is arranged between the valve body 1 and the valve seat 25, the valve clack 23 is arranged in the valve cage 24, a plurality of throttling windows 26 are arranged on the valve cage 24, the upper adjusting pair 231 of the valve clack 23 is attached to the inner wall of the valve cage 24, the valve clack 23 is lifted up and down along with the valve rod 22 to make the lower side end of the upper adjusting pair 231 match with the throttling windows 26 so as to regulate the flow of the medium in the flow channel 11, the outer wall of the lower sealing pair 232 of the valve clack 23 is provided with a sealing surface a27 which is matched with the valve seat 25, the inner wall of the upper end of the valve seat 25 is provided with a sealing surface B28 matched with the sealing surface A27, the outer wall of the upper adjusting pair 231 is provided with a plurality of flow balance holes 210, and the flow balance holes 210 are arranged from top to bottom;
the driving structure 3 comprises an actuator 31 which is arranged at the upper end of the valve rod 22 and drives the valve rod 22 to lift up and down, and the actuator 31 is connected with an actuator support 32;
a sealing structure 4, the sealing structure 4 includes a cavity 41 between a valve rod 22 and a valve cover 21 and a packing 42 arranged in the cavity 41, and further includes a cavity 43 between the valve cover 21 and a valve body 1, a sealing gasket ring 44 and a sealing gasket 45 arranged in the cavity 43, the sealing gasket ring 44 is arranged above the sealing gasket 45, pre-compression of the sealing gasket ring 44 and the sealing gasket 45 is realized by screwing a compression disc 46 and the inner wall of the valve body 1 through threads, the compression disc 46 is provided with a plurality of compression screws 50 distributed in an equal circumference, the compression screws 50 completely compress the sealing gasket ring 44, the sealing gasket 45, the valve cover 21, the cage 24, the valve seat 25 and the winding gasket 211, and the packing 42 compresses the packing 42 through a packing gland 47.
In the staggered opening and closing structure, the valve clack 23 adopts a T-shaped structure of the upper adjusting pair 231 and the lower sealing pair 232, the sealing surface A27 of the lower sealing pair 232 is in sealing fit with the sealing surface B28 of the valve seat 25 to realize the closing of the flow channel 11 and the medium outlet 13, and the area of the outer side of the lower end of the upper adjusting pair 231 and the throttling window 26 of the valve cage 24 is adjusted to realize the adjustment of the medium flow, so that the flushing damage of the medium to the sealing surface A27 and the sealing surface B28 is avoided through the structure form of staggered sealing and flow adjustment among the valve clack 23, the valve cage 24 and the valve seat 25.
When the medium passes through the throttling window 26 along with the rising of the valve clack 23 and is discharged to the medium outlet 13, cavitation and flash evaporation generated when the medium passes through the throttling window 26 cannot damage the sealing surface A27 of the lower sealing pair 232 of the valve clack 23, and even if scouring and blowing damage is generated on the outer side of the lower end of the upper adjusting pair 231, the sealing performance when the valve seat 25 is inosculated with the valve clack 23 cannot be influenced, so that the sealing and flow regulation staggered structural form ensures the sealing performance of the high-pressure regulating valve, and the long-term use of the high-pressure-difference and small-flow regulating valve is realized.
According to the invention, the sealing gasket ring 44 and the sealing gasket 45 are arranged in the cavity 43 between the valve body 1 and the valve cover 21 to seal and separate media in the valve cage 24 and the flow channel 11, the sealing gasket ring 44 and the sealing gasket 45 are compressed with the cavity 43 through the compression disc 46, then the packing 42 is arranged in the cavity 41 between the valve rod 22 and the valve cover 21, and the packing 42 is compressed through the packing gland 47 and the stud 410, so that the leakage of the media caused by the vertical lifting of the valve rod 22 is avoided, and a uniform integral structure is formed by the mutual connection among the compression disc 46, the valve cover 21, the packing gland 47 and the actuator support 32, so that the valve cover 21, the valve body 1, the packing gland 47 and the actuator support 32 are locked in a high-stability integral mode, and the service life and the service performance of the high-pressure valve are prolonged.
In the present embodiment, the throttling window 26 adopts a parabolic, equal percentage, straight line, quick-opening, and various combination forms of flow characteristic curve linear structure.
As shown in fig. 3, 4a is a schematic structural diagram of a parabolic flow curved linear throttling window 26, 4b is a schematic structural diagram of an equal percentage flow curved linear throttling window 26, 4c is a schematic structural diagram of a straight-line curved linear throttling window 26, 4d is a schematic structural diagram of a quick-opening flow curved linear throttling window 26, the flow regulation opening degree is increased according to the corresponding flow characteristic curve amplitude, and a suitable throttling window 26 structure is selected according to the use condition. Because the pressure difference is larger during flow regulation, a curved surface linear structure is adopted for the throttling window 26, the opening degree of flow regulation is gradually increased in a small range, and the flow stability regulation is facilitated.
Wherein the plurality of throttling windows 26 are evenly distributed at a radially central location of the cage 24.
Further, the sealing surface a27 of the lower sealing pair 232 of the valve clack 23 is a conical guide surface.
Furthermore, a sealing ring 29 is sleeved on the outer circumference of the valve rod 22 on the upper end face of the valve clack 23, and the sealing ring 29 is closely attached to the inner wall of the valve cage 24.
The setting of sealing ring 29 of valve clack 23 upper end prevents the medium seepage of upper reaches to the upside position in the valve cage 24, the pressure imbalance about valve clack 23 in the valve cage 24 is avoided, have a plurality of flow balance hole 210 on the vice 231 of adjusting on the valve clack 23 simultaneously, can follow the flow balance hole 210 to the medium of the interior upside position of valve cage 24 whereabouts of flow balance hole 210 in to medium export 13 then, consequently, the setting of sealing ring 29 and flow balance hole 210 plays the effect of balanced valve cage 24 internal pressure, thereby guarantee the stationarity of the upper and lower open and close operation of valve rod 22.
In the sealing structure 4, the bolt pressure plate 48 is connected to the outer circumference of the valve cover 21 in a threaded manner, the outer side of the packing gland 47 and the bolt pressure plate 48 are fastened in a balanced manner through a plurality of stud bolts 410, the stud bolts 410 are sleeved with nuts 411 at the positions where the upper ends of the packing gland 47 are placed, and tension compensation pieces 412 are arranged between the lower end faces of the nuts 411 and the upper end faces of the packing gland 47.
When a valve rod 22 descends to enable a sealing surface A27 of a valve clack 23 and a sealing surface B28 to be tightly attached and sealed, and meanwhile, the outer wall of an upper adjusting pair 231 of the valve clack 23 covers a plurality of throttling windows 26 on a valve cage 24, so that the flow channel 11, a medium inlet 12 and a medium outlet 13 are closed, when the valve rod 22 ascends to enable the sealing surface A27 of the valve clack 23 to be separated from the sealing surface B28, meanwhile, the outer wall of the upper adjusting pair 231 of the valve clack 23 moves upwards, and the medium flow is adjusted through the size of the throttling area between the outer wall of the lower end of the upper adjusting pair 231 and the throttling windows 26.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a realize sealed and adjust open anti-scouring high-pressure regulating valve which characterized in that: comprises that
The valve body is internally provided with a flow channel for accommodating a medium to circulate, and the valve body is also internally provided with a medium inlet and a medium outlet which are communicated with the flow channel;
the staggered opening and closing structure comprises a valve cover and a valve rod which are arranged in a valve body, the lower end of the valve rod is arranged in a flow channel, the lower end of the valve rod is connected with a valve clack, the valve clack consists of an upper adjusting pair and a lower sealing pair, the valve clack is of a T-shaped structure with a wide upper part and a narrow lower part, a valve cage and a valve seat which are distributed up and down are arranged in the flow channel, a wound gasket is arranged between the valve body and the valve seat, the valve clack is arranged in the valve cage, a plurality of throttling windows are arranged on the valve cage, the upper adjusting pair of the valve clack is attached to the inner wall of the valve cage, the lower side end of the upper adjusting pair is matched with the throttling windows along with the up-down lifting of the valve rod so as to adjust the flow of a medium in the flow channel, the outer wall of the lower end of the lower sealing pair of the valve clack is provided with a sealing surface A which is in sealing fit with the valve seat, the inner wall of the upper end of the valve seat is provided with a sealing surface B which is matched with the sealing surface A, the outer wall of the upper adjusting pair is provided with a plurality of flow balance holes, and the flow balance holes are arranged from top to bottom;
the driving structure comprises an actuator which is arranged at the upper end of the valve rod and drives the valve rod to lift up and down, and the actuator is connected with an actuator support;
a seal structure, seal structure includes the cavity between valve rod and the valve gap and arranges the packing in the cavity in, still includes the cavity between valve gap and the valve body and arranges the sealed backing ring, sealed the pad in the cavity in, sealed top of filling up is arranged in to the sealed backing ring, screw through compressing tightly dish and valve body inner wall in the cavity is screwed and is realized the precompression to sealed backing ring, sealed pad, compressing tightly has a plurality of compressing screws that wait the circumference to distribute on the dish, compressing tightly screw compresses tightly sealed backing ring, sealed pad, valve gap, cage, disk seat, winding gasket completely, the packing realizes compressing tightly to the packing through gland.
2. The anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type according to claim 1, characterized in that: the throttling window adopts a parabolic, equal-percentage, straight-line, quick-opening and multi-combination flow characteristic curved surface linear structure.
3. The anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type according to claim 2, characterized in that: the plurality of throttling windows are uniformly distributed in the radial center position of the valve cage.
4. The anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type according to claim 3, characterized in that: and a sealing surface A of a lower sealing pair of the valve clack is a conical guide surface.
5. The anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type according to claim 4, characterized in that: the valve rod is sleeved with a sealing ring on the outer circumference of the upper end face of the valve clack, and the sealing ring is tightly attached to the inner wall of the valve cage.
6. The anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type according to claim 5, characterized in that: the outer circumference threaded connection of valve gap has the bolt clamp plate, realize balanced fastening through a plurality of stud between gland's the outside and the bolt clamp plate, the position cover that gland upper end was arranged in to the stud is equipped with the nut, tension compensation spare has between the lower terminal surface of nut and the upper end face of gland.
7. A flow rate adjusting method for realizing sealing and adjusting of a staggered anti-scouring high-pressure adjusting valve by using the valve as claimed in claim 6, which is characterized in that: when the valve rod descends, the sealing surface A and the sealing surface B of the valve clack are tightly attached and sealed, and meanwhile, the outer wall of the upper adjusting pair of the valve clack covers a plurality of throttling windows on the valve cage, so that the closing of a flow channel, a medium inlet and a medium outlet is realized, when the valve rod ascends, the sealing surface A and the sealing surface B of the valve clack are separated, and meanwhile, the outer wall of the upper adjusting pair of the valve clack moves upwards and realizes the adjustment of the medium flow through the size of the throttling area between the outer wall of the lower end of the upper adjusting pair and the throttling windows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110542928.2A CN113236801A (en) | 2021-05-19 | 2021-05-19 | Anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type and flow regulating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110542928.2A CN113236801A (en) | 2021-05-19 | 2021-05-19 | Anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type and flow regulating method thereof |
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| CN113236801A true CN113236801A (en) | 2021-08-10 |
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| CN202110542928.2A Pending CN113236801A (en) | 2021-05-19 | 2021-05-19 | Anti-scouring high-pressure regulating valve for realizing sealing and regulating staggered type and flow regulating method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017540A (en) * | 2021-11-03 | 2022-02-08 | 哈尔滨工程大学 | Low-power consumption governing valve |
| WO2024098733A1 (en) * | 2022-11-08 | 2024-05-16 | 苏州纽威阀门股份有限公司 | Regulating valve |
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| CN203202256U (en) * | 2013-01-25 | 2013-09-18 | 江苏宇达电站辅机阀门制造有限公司 | Small flow control valve |
| CN209524091U (en) * | 2018-12-25 | 2019-10-22 | 成都斯杰化工机械有限公司 | A kind of multi-layer sealed balanced type regulating valve |
| CN211715800U (en) * | 2019-12-17 | 2020-10-20 | 依蔼希(江苏)管道控制系统有限公司 | Straight-through regulating valve internal part capable of being tightly shut off under particle working condition |
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| US4971099A (en) * | 1989-12-15 | 1990-11-20 | Cooper Industries, Inc. | Pressure balanced cartridge choke valve |
| CN203202256U (en) * | 2013-01-25 | 2013-09-18 | 江苏宇达电站辅机阀门制造有限公司 | Small flow control valve |
| CN209524091U (en) * | 2018-12-25 | 2019-10-22 | 成都斯杰化工机械有限公司 | A kind of multi-layer sealed balanced type regulating valve |
| CN211715800U (en) * | 2019-12-17 | 2020-10-20 | 依蔼希(江苏)管道控制系统有限公司 | Straight-through regulating valve internal part capable of being tightly shut off under particle working condition |
| CN111853306A (en) * | 2020-07-24 | 2020-10-30 | 浙江大学 | Valve core assembly capable of changing inherent valve characteristics, regulating valve and flow control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017540A (en) * | 2021-11-03 | 2022-02-08 | 哈尔滨工程大学 | Low-power consumption governing valve |
| WO2024098733A1 (en) * | 2022-11-08 | 2024-05-16 | 苏州纽威阀门股份有限公司 | Regulating valve |
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Application publication date: 20210810 |