CN214699209U - Black water regulating valve - Google Patents

Abstract

The utility model discloses a black water governing valve, including disk seat, valve body, disk seat ring, guide ring, valve rod, upper valve cover and flange, flange joint is in the exit end of valve body, disk seat and disk seat ring centre gripping form axial positioning between flange and valve body, the disk seat lower extreme forms radial positioning through the annular boss and the ring channel cooperation of evagination with disk seat ring upper end. The utility model discloses a cooperation of annular arch and ring channel makes disk seat and disk seat ring realize coaxial assembly, improves the assembly precision of the two, can effectively prevent the emergence of the disk seat ring offset stroke damage condition, prevents droing that the case atress inequality leads to, improves case card pause or pause phenomenon, improves the life of valve body, reduces later stage cost of maintenance.

Description

Black water regulating valve

Technical Field

The utility model relates to the technical field of valves, in particular to black water governing valve.

Background

The black water regulating valve is used in a gas-liquid-solid three-phase flow medium with a large inlet-outlet pressure difference for a long time, the field working condition is severe, and the valve is required to be corrosion-resistant, scour-resistant, safe and reliable, is convenient to maintain and replace, and has the requirements of long service life and the like. The lower end of the valve seat and the upper end of the valve seat ring in the traditional black water regulating valve are of a plane matching structure, the matching structure enables the assembling precision of the valve seat and the valve seat ring to be seriously dependent on the positioning of the valve body and other parts on the valve seat and the valve seat ring, and once the valve body and other parts have manufacturing errors, the valve seat and the valve seat ring are easily installed in an assembling process to be inclined, so that the valve seat ring is inclined to the direction in the using process, and the valve is damaged.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a black water governing valve, disk seat and disk seat ring realize the assembly through self location structure, improve its assembly precision, can effectively prevent the emergence of the valve seat ring offset damage condition.

The utility model provides a black water governing valve, including disk seat, valve body, disk seat ring, guide ring, valve rod, upper valve cover and flange, flange joint is in the exit end of valve body, disk seat and disk seat ring centre gripping form axial positioning between flange and valve body, the disk seat lower extreme forms radial positioning with disk seat ring upper end through the annular boss and the ring channel cooperation of evagination.

Furthermore, a spiral groove is formed in the outer circle of the matched position of the valve rod and the guide ring.

Further, the inner circle of the matching position of the guide ring and the valve rod is provided with a straight groove which vertically extends to the lower end of the guide ring.

Further, the valve seat comprises a valve seat body and a valve seat hard alloy layer attached to the inner wall of the valve seat body.

Further, the valve seat ring includes a valve seat ring body and a valve seat ring hard alloy layer attached to an inner wall of the valve seat ring body.

Further, the inner cavity of the valve seat body is a stepped hole with a small upper part and a large lower part, and the hard alloy layer of the valve seat is of a stepped sleeve structure with an outer circle matched with the inner cavity of the valve seat body.

Further, the inner cavity of the valve seat ring body is a stepped hole with a large top and a small bottom, and the hard alloy layer of the valve seat ring is of a stepped sleeve structure matched with the inner cavity of the valve seat ring body in an excircle mode.

Furthermore, the excircle of the guide ring is a tapered surface which is reduced from top to bottom.

Furthermore, a plurality of flow guide rib plates are distributed on the outer circumference of the guide ring, the flow guide rib plates extend from top to bottom along the inclined plane of the outer circumference of the guide ring, and each flow guide rib plate is obliquely arranged along the same circumferential direction.

Further, the valve seat inner hole is a tapered hole with a small upper part and a large lower part, the valve seat ring inner hole is a tapered hole with a small upper part and a large lower part, and the diameter of the large-diameter end of the valve seat inner hole is smaller than the diameter of the small-diameter end of the valve seat ring inner hole.

The utility model has the advantages that:

the radial positioning of the middle valve seat and the valve seat ring of the utility model does not depend on the valve body and the flange, the valve seat and the valve seat ring realize coaxial assembly through the matching of the annular bulge and the annular groove, the assembly precision of the valve seat and the valve seat ring is improved, the occurrence of the offset impact damage condition of the valve seat ring can be effectively prevented, the falling caused by uneven stress of the valve core is prevented, the blocking phenomenon of the valve core is improved, the service life of the valve body is prolonged, and the later maintenance cost is reduced; in addition, the valve seat and the valve seat ring can effectively prevent the valve body from being damaged by washing through the hard alloy layer, the hard alloy layer can effectively prevent the valve body from falling off in a shaft shoulder matching mode, and the reliability and the stability of the valve are improved;

the spiral groove and the straight groove are used as scrapers, and attachments attached to the inner wall of the guide ring and the valve rod can be automatically and continuously removed in the vertical movement process of the valve rod, so that the valve is effectively prevented from being locked; the spiral groove and the straight flute are also favorable to holding the medium that peels off as the storage tank simultaneously, improve the friction between valve rod and the guide ring, and spiral groove and straight flute do benefit to the discharge of medium as the conveyer trough in addition, and the setting of spiral groove and straight flute can effectively reduce the area of contact between guide ring and the valve rod, effectively prevent that guide ring and valve rod card from stumbling or even blocking.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the enlarged partial structure of FIG. 1;

FIG. 3 is a schematic view of a portion of the enlarged structure of FIG. 1;

FIG. 4 is a schematic view of a valve seat ring configuration;

FIG. 5 is a schematic view of a valve seat structure;

Detailed Description

The embodiment provides a black water regulating valve, which is shown by combining the attached drawing and comprises a valve seat 4, a valve body 5, a valve seat ring 3, a guide ring 7, a valve rod 6, an upper valve cover 9 and a flange 1, wherein the flange is connected at the outlet at the lower end of the valve body, the inner circle of the flange and the outer circle of the valve seat ring are sealed by a metal winding gasket 2, the bottom of the valve rod is connected with a valve core 8, the valve rod is sleeved in the guide ring and is in sliding fit with the guide ring, a valve rod driving valve core is inserted into the valve seat to form a closed state or drives the valve core to slide out of the valve seat to form an open state, the upper valve cover is sealed and covered on the valve body, the upper valve cover is sealed and provided with a packing gland 10, the packing gland presses a packing 11 between the valve cover and the upper valve cover, a sliding bearing 12 is arranged between the packing gland and the valve rod, the lower end of the valve rod is slidably sleeved in the guide ring, the size of an inner cavity of the valve body is large, and a smooth flow passage is arranged in the valve body, the valve body is internally provided with a Venturi valve seat structural design, the valve core is made of integrally sintered hard alloy, a cylindrical pin is driven into the valve rod after the valve core is embedded into the valve rod, two ends of the cylindrical pin are welded, and the valve core is effectively prevented from falling off, wherein the valve seat 4, the valve body 5, the valve seat ring 3, the guide ring 7, the valve rod 6, the upper valve cover 9 and the flange 1 can adopt the existing structure, and details are not repeated;

the flange 1 is connected to the outlet end of the valve body, the valve seat and the valve seat ring are clamped between the flange and the valve body to form axial positioning, and the lower end of the valve seat and the upper end of the valve seat ring form radial positioning through the matching of an outer-convex annular boss and an outer-convex annular groove. Referring to fig. 1, the outer circle of the valve seat is of a small-top and large-bottom structure, the outer circle of the valve seat ring is of a large-top and small-bottom structure, the outlet of the valve body is provided with a stepped hole which is small-top and large-bottom and is matched with the outer circle of the valve seat, the inlet end of the flange is provided with a stepped hole which is large-top and small-bottom and is matched with the outer circle of the valve seat ring, and the valve seat ring are axially clamped and mounted in the corresponding stepped holes; an annular groove can be arranged at the lower end of the valve seat, an annular bulge is arranged at the upper end of the valve seat ring, or an annular bulge is arranged at the lower end of the valve seat, and an annular groove is arranged at the upper end of the valve seat ring, wherein the annular bulge can be a bulge structure protruding from the end surface, or the annular bulge can be a structure of the lower end of the valve seat or the upper end of the valve seat ring, and as shown in the attached drawing, the valve seat hard alloy layer 4b of the valve seat in the embodiment protrudes downwards from the surface of the lower end of the valve seat to form the annular bulge, the annular bulge is embedded into the annular groove at the upper end of the valve seat ring, and the annular groove is arranged on the upper end surface of the valve seat hard alloy layer 3 b; disk seat and disk seat ring pass through flange and valve body centre gripping axial positioning to cooperation through annular arch and ring channel makes disk seat and disk seat ring realize coaxial assembly, disk seat and disk seat ring axial and radial positioning are independent each other, improve the assembly precision of the two, can effectively prevent the emergence of the valve seat ring offset towards the damage condition, prevent droing that the case atress inequality leads to, improve case card pause phenomenon, improve the life of valve body, reduce later stage cost of maintenance.

In this embodiment, the valve seat includes a valve seat body 4a and a valve seat hard alloy layer 4b attached to an inner wall of the valve seat body. The valve seat ring comprises a valve seat ring body 3a and a valve seat ring hard alloy layer 3b attached to the inner wall of the valve seat ring body. The hard alloy layer 3b of the valve seat ring and the hard alloy layer 4b of the valve seat are made of tungsten carbide alloy, of course, other known hard alloys can be adopted, the contact surface of the valve seat and the inner wall of the valve seat ring with a medium is made of supersonic spraying hard alloy, the hard alloy layer, the valve seat body and the metal layer of the valve seat ring body are embedded into a whole in a hot way, and the hard alloy layer can effectively prevent the valve body from being damaged by washing.

In this embodiment, the upper end of the inner cavity of the valve seat is provided with a chamfer used for matching with the valve core. The upper end of the inner hole of the valve seat forms a reasonable inclined plane through the chamfer, the inclination angle alpha of the chamfer is 25-35 degrees, the inclination angle of the chamfer is 30 degrees in the embodiment, the valve core is also provided with an inclined plane matched with the inclination angle, the sealing of the valve core is facilitated through the inclined plane, and meanwhile, the medium accumulation can be effectively prevented in the closing process of the valve, and the valve core and the valve seat are prevented from being clamped.

In this embodiment, the aperture of the lower end of the inner hole of the valve seat is larger than the aperture of the upper end of the inner hole of the valve seat ring. The inner hole of the valve seat is the inner cavity of the hard alloy layer 4b of the valve seat, the inner hole of the valve seat ring is the inner cavity of the hard alloy layer 3b of the valve seat, and the valve seat inner hole and the inner hole of the valve seat ring are coaxially arranged, the lower end of the valve seat inner hole is slightly larger than the upper end of the inner hole of the valve seat ring, so that the valve core can not interfere with the valve seat ring when inserted into the valve seat, and a certain small allowance is reserved for the bias of the valve seat ring.

In this embodiment, the inner cavity of the valve seat body 4a is a stepped hole with a small top and a large bottom, and the valve seat hard alloy layer 4b is a stepped sleeve structure with an outer circle matched with the inner cavity of the valve seat body. The shaft shoulder of the valve seat hard alloy layer 4b upwards abuts against the shaft shoulder of the inner cavity of the valve seat body 4a to prevent the valve seat hard alloy layer 4b on the valve seat from upwards falling off;

in this embodiment, the inner cavity of the valve seat ring body 3a is a stepped hole with a large top and a small bottom, and the valve seat ring hard alloy layer 3b is a stepped sleeve structure with an outer circle matched with the inner cavity of the valve seat ring body 3 a. The shaft shoulder of the valve seat ring hard alloy layer 3b is downwards supported at the shaft shoulder of the inner cavity of the valve seat ring body 3a to prevent the valve seat ring hard alloy layer 3b from falling downwards;

in this embodiment, the disk seat hole is big end down's bell mouth, 3 holes of disk seat ring are big end down's bell mouth, disk seat hole major diameter end diameter is less than disk seat ring hole minor diameter end diameter. The inclination angle of the conical surface of the inner hole of the valve seat is beta, the beta is 1-3 degrees, the inclination angle of the conical surface of the inner hole of the valve seat ring is gamma, and the gamma is 4-10 degrees, namely the expansion degree of the inner hole of the valve seat ring is greater than that of the inner hole of the valve seat, so that a Venturi effect is formed when a medium passes through the valve seat and the valve seat ring, the medium is prevented from being retained by the valve body, the flow capacity is increased, and the blockage is prevented.

In this embodiment, the tapered slot 4c that contracts downwards and set up with the disk seat hole is seted up to disk seat up end, the chamfer sets up in the minor diameter end of tapered slot. It is shown to combine the attached drawing, and this tapered groove does benefit to guide case and gets into the disk seat hole, and tapered groove cooperation chamfer structure does benefit to and further prevents that the medium from piling up, prevents that case and disk seat card are dead.

In this embodiment, the outer circle of the matching position of the valve rod and the guide ring is provided with a spiral groove 13. In the embodiment, the vertical direction is consistent with the axial direction of the valve rod; the valve rod is provided with a spiral groove which can be a rectangular groove, a triangular groove or a groove body in other shapes, and the spiral groove is used as a scraper, so that attachments attached to the inner wall of the guide ring can be automatically and continuously removed in the vertical movement process of the valve rod, and the valve is effectively prevented from being locked; meanwhile, the spiral groove is used as a containing groove to contain peeled media, friction between the valve rod and the guide ring is improved, the spiral groove is used as a conveying groove to discharge the media, the contact area between the guide ring and the valve rod can be effectively reduced due to the arrangement of the spiral groove, and the guide ring and the valve rod are effectively prevented from being jammed or even dead.

In this embodiment, the inner circle of the matching position of the guide ring and the valve rod is provided with a straight groove 14 vertically extending to the lower end of the guide ring. The straight groove is uniformly distributed on the inner wall of the guide ring in the circumferential direction, the straight groove can also play a role of a scraper to assist in peeling off attachments in the up-and-down sliding process of the valve rod, the straight groove is matched with the spiral groove to improve the efficiency of scraping off the attachments, the straight groove can also contain peeled media, and the straight groove can also be used as a channel to discharge the peeled media to the outside of the guide ring.

In this embodiment, the outer circle of the guide ring is a tapered surface which is reduced from top to bottom. The conical outer circle structure of the guide ring is beneficial to guiding media at a horizontal inlet of the valve body, so that the media flow downwards along the inclined plane of the guide ring towards the outlet of the valve, the impact of the medium guide ring and the valve rod is reduced, and the problem of valve core vibration is solved.

In this embodiment, a plurality of flow guide rib plates 15 are circumferentially distributed on the outer circumference of the guide ring, the flow guide rib plates extend from top to bottom along the inclined plane of the outer circumference of the guide ring, and each flow guide rib plate is obliquely arranged along the same circumferential direction. Each flow guide rib plate can incline along the clockwise direction or the anticlockwise direction, and the arrangement of each flow guide rib plate is favorable for guiding a medium to flow downwards and guiding the medium to flow circumferentially at the same time, so that the downward impact force of the medium can be effectively reduced, the impact of the medium on the valve core and the valve seat is reduced, the problem of valve core vibration is solved, and the breakage of a valve core head is prevented.

In this embodiment, the inner cavity of the guide ring is of a stepped hole structure with a large upper part and a small lower part, the valve rod is in sliding fit with the small-diameter section of the guide ring, and the straight groove is vertically arranged on the inner circle of the small-diameter section of the guide ring and upwards penetrates through the shaft shoulder. As shown in the attached drawing, the shaft shoulder can be used as a cutter to assist in stripping attachments on the valve rod, and meanwhile, the upper end of the straight groove is communicated with the inner cavity of the guide ring, so that stripping media can be discharged conveniently.

In this embodiment, the valve rod is a stepped shaft with a small upper part and a large lower part, and the spiral groove 13 is arranged on a large-diameter section of the valve rod. The valve rod of the structure can enable a gap to be formed between the small-diameter section and the inner cavity of the guide ring, and the contact area between the small-diameter section and the inner wall of the guide ring is reduced.

In this embodiment, a cutting edge is disposed at the notch of the spiral groove 13. The spiral groove can be set to be a trapezoid groove structure with a small inside and a large outside or a parallelogram structure which is obliquely arranged, so that the notch of the spiral groove automatically forms a sharp cutting edge, and the medium is shoveled and removed through the cutting edge.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (10)

1. The utility model provides a black water governing valve, includes disk seat, valve body, disk seat ring, guide ring, valve rod, goes up valve cap and flange, its characterized in that: the flange joint is in the exit end of valve body, disk seat and disk seat ring centre gripping form axial positioning between flange and valve body, the disk seat lower extreme forms radial positioning through the annular boss and the ring channel cooperation of evagination with disk seat ring upper end.

2. The black water adjusting valve according to claim 1, wherein: and a spiral groove is formed in the outer circle of the matching part of the valve rod and the guide ring.

3. The black water adjusting valve according to claim 2, wherein: the inner circle of the matching part of the guide ring and the valve rod is provided with a straight groove which vertically extends to the lower end of the guide ring.

4. The black water adjusting valve according to claim 1, wherein: the valve seat comprises a valve seat body and a valve seat hard alloy layer attached to the inner wall of the valve seat body.

5. The black water adjusting valve according to claim 1, wherein: the valve seat ring includes a valve seat ring body and a valve seat ring hard alloy layer attached to an inner wall of the valve seat ring body.

6. The black water adjusting valve according to claim 4, wherein: the inner cavity of the valve seat body is a stepped hole with a small upper part and a large lower part, and the hard alloy layer of the valve seat is of a stepped sleeve structure with an outer circle matched with the inner cavity of the valve seat body.

7. The black water adjusting valve according to claim 5, wherein: the inner cavity of the valve seat ring body is a stepped hole with a large top and a small bottom, and the hard alloy layer of the valve seat ring is of a stepped sleeve structure matched with the inner cavity of the valve seat ring body in an excircle mode.

8. The black water adjusting valve according to claim 1, wherein: the excircle of the guide ring is a tapered surface which is reduced from top to bottom.

9. The black water adjusting valve according to claim 8, wherein: the guide ring is characterized in that a plurality of flow guide rib plates are distributed on the outer circumference of the guide ring in the circumferential direction, the flow guide rib plates extend from top to bottom along the outer circular inclined plane of the guide ring, and the flow guide rib plates are obliquely arranged along the same circumferential direction.

10. The black water adjusting valve according to claim 1, wherein: the valve seat inner hole is big end down's bell mouth, valve seat ring hole is big end down's bell mouth, valve seat inner hole major diameter end diameter is less than valve seat ring inner hole minor diameter end diameter.

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