CN114382904B - Cone valve and valve seat matching structure of reciprocating pump - Google Patents
Cone valve and valve seat matching structure of reciprocating pump Download PDFInfo
- Publication number
- CN114382904B CN114382904B CN202210068901.9A CN202210068901A CN114382904B CN 114382904 B CN114382904 B CN 114382904B CN 202210068901 A CN202210068901 A CN 202210068901A CN 114382904 B CN114382904 B CN 114382904B
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- valve
- cone
- valve seat
- cone valve
- reciprocating pump
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Classifications
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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
- F16K1/38—Valve members of conical shape
-
- 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
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
Abstract
The invention relates to a cone valve and valve seat matching structure of a reciprocating pump, which comprises a valve seat, a cone valve and a gland which are arranged in a valve body; the lower part of the inner wall of the valve seat is a straight hole section, and the upper end of the straight hole section is gradually flared to form a conical valve seat sealing surface; the valve leg connecting part of the cone valve is fixedly connected with a plurality of valve legs along the radial direction; the free ends of the valve legs extend radially outwardly and upwardly to the inner wall of the straight bore section, the tops of the free ends of the valve legs being below the valve seat sealing surface when the cone valve is in the maximum lift position. According to the invention, the valve leg of the traditional cone valve is not used, but is designed to be inclined upwards, and meanwhile, when the cone valve is positioned at the maximum lift position, the free end of the valve leg is lower than the sealing surface of the valve seat, so that the influence of the valve leg on the flow state of fluid entering the cone-shaped circumferential seam can be reduced, the flow speed of the fluid at the position is improved, the pressure of the valve block at the position is more uniform, and the possibility of damage of the valve block is reduced.
Description
Technical Field
The invention belongs to the technical field of reciprocating pumps, and particularly relates to a cone valve and valve seat matching structure of a reciprocating pump.
Background
In the conventional structure for matching the cone valve and the valve seat of the reciprocating pump, referring to fig. 1 and 2, serious scour damage, i.e. contact fatigue failure, often occurs at the corresponding position where the cone valve 2 (or the valve seat 1) is matched with the valve leg 6, which is a fatigue peeling damage phenomenon caused after repeated long-term actions of contact compressive stress. The greatest feature is pitting or shallow spalling on the contact surface, and fatigue striations are visible in spalling pits.
Specifically, referring to fig. 1 and 2, in the partial view a corresponding to the closed and maximum lift state of the valve set under the conventional cone valve and valve seat matching structure, the edge of the bottom surface of the cone valve 2 forms a sharp angle, and the cone valve sealing surface 23 acts on the valve seat sealing surface 12, so that a large impact load exists, and the stress concentration at the position a is too large, which is easy to cause damage; when the cone valve 2 is at the maximum lift position in the partial view B, the free end of the valve leg 6 is higher than the valve seat sealing surface 12, so that the flow state of fluid entering the cone-shaped circular seam is seriously changed, the flow speed and the pressure at the B are uneven, and the damage is easy to form; at the position of the partial view C, the welding position of the cone valve 2 and the valve leg 6 can only be subjected to fillet welding treatment, the welding space is narrow, the welding construction is inconvenient, the welding quality is not easy to be ensured, and the connection strength of fillet welding is low; in the partial view D, the valve leg 6 has a rectangular cross-section, so that the fluidity of the fluid is seriously hindered, and the flow speed and the pressure near the valve leg 6 are extremely uneven, so that the valve group is easy to damage; in the partial view E, the valve leg 6 is inclined upwards, and the matching structure of the cone valve 2 and the valve seat 1 is close to the annular surface of the valve gap, so that the flow of fluid is seriously affected, and the valve group is easily damaged.
In summary, the matching structure of the traditional cone valve and the valve seat seriously hinders the fluid flow, and contact fatigue failure can occur to damage the valve set.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a cone valve and valve seat matching structure of a reciprocating pump, so as to avoid the problem that the valve set is damaged due to the influence of a medium flow state form caused by unreasonable matching structure, and achieve the effect of reducing repeated flushing of the corresponding positions of the valve seat and the valve legs to protect the valve set.
In order to solve the technical problems, the invention adopts the following technical scheme:
the cone valve and valve seat matching structure of the reciprocating pump comprises a valve seat, a cone valve and a gland, wherein the valve seat, the cone valve and the gland are arranged in a valve body, a valve rod is fixedly connected above the cone valve, the valve rod is in threaded connection with the gland through external threads, and a sealing rubber is arranged between the gland and the cone valve; the valve seat is cylindrical, the lower part of the inner wall of the valve seat is a straight hole section, the upper end of the straight hole section is gradually flared to form a conical valve seat sealing surface, and the outer circumferential surface of the cone valve is matched with the valve seat sealing surface and forms a cone valve sealing surface; the bottom surface of the cone valve faces the straight hole section, the middle part of the bottom surface protrudes downwards and is formed into a valve leg connecting part, and a plurality of valve legs are fixedly connected to the valve leg connecting part along the radial direction; the free ends of the valve legs extend radially outwardly and upwardly to the inner wall of the straight bore section for stable guiding during cone valve lift, the tops of the free ends of the valve legs being below the valve seat sealing surface when the cone valve is in the maximum lift position.
The technical scheme is further perfected, and the junction of the conical valve sealing surface and the bottom surface of the conical valve is in arc transition.
Further, the cross section of the valve leg is elliptic, the major axis of the ellipse corresponds to the axis of the cone valve, and the minor axis of the ellipse is perpendicular to the axis of the cone valve.
Further, the valve legs are uniformly distributed and connected to a sleeve in the circumferential direction, the lower part of the valve leg connecting part is transited to the small-diameter section through a step surface, the sleeve is sleeved on the small-diameter section, the upper end surface of the sleeve is abutted to the step surface and butt-welded, and the edge of the bottom surface of the small-diameter section is fixedly welded with the sleeve in a circle.
Further, the sealing rubber sleeve is arranged outside the gland.
Further, a circle of annular gap is formed at the lower part of the outer circumferential surface of the gland in the radial inward direction, and the sealing rubber is arranged in the annular gap; the outer circumferential surface of the sealing rubber is matched with the sealing surface of the valve seat.
Further, a plurality of conical grooves are formed in the contact surface of the conical valve and the sealing rubber.
Further, two sealing ring grooves are formed in the outer circumferential surface of the valve seat, and sealing rings are arranged in the sealing ring grooves.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the cone valve and valve seat matching structure of the reciprocating pump, the valve legs of the traditional cone valve are not used, but are designed to be inclined upwards, and meanwhile, when the cone valve is positioned at the maximum lift position, the free ends of the valve legs are lower than the sealing surface of the valve seat, so that the influence of the valve legs on the flow state of fluid entering the cone-shaped annular seam by the fluid can be reduced, the flow rate of the fluid at the position is improved, the pressure born by the valve group at the position is more uniform, and the possibility of damage to the valve group is reduced.
2. According to the cone valve and valve seat matching structure of the reciprocating pump, the outer edge of the bottom surface of the cone valve is in arc transition, so that stress concentration is greatly reduced on the premise that the overall sealing performance of the valve set is not affected, the impact fatigue resistance and the contact stress bearing capacity of the whole valve set are improved under the impact load of the cone valve, the abrasion speed is delayed, and the service life of the valve set is further prolonged.
3. According to the cone valve and valve seat matching structure of the reciprocating pump, the cross section shape of the valve leg is designed to be elliptical, so that the obstruction of the valve leg to fluid is greatly reduced, the flow speed and the pressure of the fluid near the valve leg are more uniform, and the possibility of damage to the valve group is reduced.
Drawings
FIG. 1 is a schematic diagram of a valve block in a closed state under a conventional cone valve and valve seat matching structure;
FIG. 2 is a schematic diagram of a maximum lift state of a valve group under a conventional cone valve and valve seat matching structure;
FIG. 3 is a schematic diagram showing a closed state of a valve block under a cone valve and valve seat matching structure of a reciprocating pump according to an embodiment;
FIG. 4 is a schematic diagram of a maximum lift state of a valve block under a cone valve and valve seat mating structure of a reciprocating pump according to an embodiment;
the valve seat 1, the straight hole section 11, the valve seat sealing surface 12, the sealing ring groove 13, the cone valve 2, the valve leg connecting part 21, the cone groove 22, the cone valve sealing surface 23, the sleeve 24, the gland 3, the valve rod 4, the sealing rubber 5 and the valve leg 6.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Referring to fig. 3-4, a cone valve and valve seat matching structure of a reciprocating pump in a specific embodiment includes a valve seat 1, a cone valve 2 and a gland 3 disposed in a valve body (not shown in the figure), a valve rod 4 is fixedly connected above the cone valve 2, the valve rod 4 is in threaded connection with the gland 3 through external threads, and a sealing rubber 5 is disposed between the gland 3 and the cone valve 2; the valve seat 1 is cylindrical, the lower part of the inner wall of the valve seat 1 is provided with a straight hole section 11, the upper end of the straight hole section 11 is gradually flared to form a conical valve seat sealing surface 12, and the outer circumferential surface of the conical valve 2 is matched with the valve seat sealing surface 12 and is formed into a conical valve sealing surface 23; the bottom surface of the cone valve 2 faces the straight hole section 11, the middle part of the bottom surface protrudes downwards and is formed into a valve leg connecting part 21, and a plurality of valve legs 6 are fixedly connected to the valve leg connecting part 21 along the radial direction; the free end of the valve leg 6 extends radially outwardly and upwardly to the inner wall of the straight bore section 11 for stable guiding during the lift of the cone valve 2, the top of the free end of the valve leg 6 being below the valve seat sealing surface 12 when the cone valve 2 is in the maximum lift position. When the cone valve sealing surface 23 is abutted against the valve seat sealing surface 12, the top of the free end of the valve leg 6 does not come out of the lower edge of the straight hole section 11.
According to the cone valve and valve seat matching structure of the reciprocating pump, a valve leg 6 of a traditional cone valve is not used any more in an inclined downward mode (as shown in fig. 1), the valve leg 6 is designed to be in an inclined upward mode, and meanwhile, when the cone valve 2 is in a maximum lift position, the free end of the valve leg 6 is lower than a valve seat sealing surface 12, so that the influence of the valve leg 6 on the flow state of fluid entering a cone-shaped circular seam can be reduced, the flow speed of the fluid at the position is improved, the pressure applied to the valve block at the position is more uniform, and the possibility that the valve block is damaged is reduced.
With continued reference to fig. 3-4, the junction between the cone valve sealing surface 23 and the bottom surface of the cone valve 2 is in an arc transition.
In this way, the outer edge of the bottom surface of the cone valve 2 is in arc transition, so that the stress concentration is greatly reduced on the premise that the overall sealing performance of the valve bank is not affected, the impact fatigue resistance and the contact stress bearing capacity of the whole valve bank are improved under the impact load of the cone valve, the abrasion speed is delayed, and the service life of the valve bank 2 is further prolonged.
The cross section of the valve leg 6 is elliptical, the major axis of the ellipse corresponds to the axis of the cone valve 2, and the minor axis of the ellipse is perpendicular to the axis of the cone valve 2.
In this way, the obstruction of the valve legs 6 to the fluid is greatly reduced, so that the flow speed and the pressure of the fluid near the valve legs 6 are more uniform, and the possibility of damaging the valve group is reduced.
The valve legs 6 are circumferentially and uniformly distributed and connected on a sleeve 24, the lower part of the valve leg connecting part 21 is transited to a small-diameter section through a step surface, the sleeve 24 is sleeved on the small-diameter section, the upper end surface of the sleeve 24 is abutted to the step surface and butt-welded, and the bottom edge of the small-diameter section is fixedly welded with the sleeve 24.
Therefore, the welding space is increased, the welding construction is facilitated, the butt welding coupling strength is higher than that of the traditional fillet welding, and the coupling strength between the valve leg 6 and the cone valve 2 is ensured.
Wherein, sealing rubber 5 cover is located outside gland 3. The lower part of the outer circumferential surface of the gland 3 is radially inwards provided with a circle of annular gap, and the sealing rubber 5 is arranged in the annular gap; the outer circumferential surface of the sealing rubber 5 is matched with the valve seat sealing surface 12.
In this way, the tightness among the gland 3, the cone valve 2 and the valve seat 1 is ensured by arranging the sealing rubber 5, and when the cone valve and the valve seat sealing surface 12 are tightly contacted under the action of certain pressure, an oil way is disconnected, and the whole valve group is in a closed state.
Wherein, a plurality of conical grooves 22 are arranged on the contact surface of the conical valve 2 and the sealing rubber 5.
In this way, the plurality of conical grooves 22 are arranged, so that the sealing rubber 5 is prevented from moving when the valve rod 4 impacts the conical valve 2, and the stability of the whole valve bank during operation is improved.
Wherein, two sealing ring grooves 13 are arranged on the outer circumferential surface of the valve seat 1, and sealing rings (not shown in the figure) are arranged in the sealing ring grooves 13.
In this way, the tightness of the valve seat 1 when it reciprocates on the valve body is improved.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and 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 modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (8)
1. The cone valve and valve seat matching structure of the reciprocating pump comprises a valve seat, a cone valve and a gland, wherein the valve seat, the cone valve and the gland are arranged in a valve body, a valve rod is fixedly connected above the cone valve, the valve rod is in threaded connection with the gland through external threads, and a sealing rubber is arranged between the gland and the cone valve; the valve seat is cylindrical, the lower part of the inner wall of the valve seat is a straight hole section, the upper end of the straight hole section is gradually flared to form a conical valve seat sealing surface, and the outer circumferential surface of the cone valve is matched with the valve seat sealing surface and forms a cone valve sealing surface; the method is characterized in that: the bottom surface of the cone valve faces the straight hole section, the middle part of the bottom surface protrudes downwards and is formed into a valve leg connecting part, and a plurality of valve legs are fixedly connected to the valve leg connecting part along the radial direction; the free ends of the valve legs extend radially outwardly and upwardly to the inner wall of the straight bore section for stable guiding during cone valve lift, the tops of the free ends of the valve legs being below the valve seat sealing surface when the cone valve is in the maximum lift position.
2. The cone valve and valve seat mating structure of a reciprocating pump of claim 1, wherein: the junction of the cone valve sealing surface and the bottom surface of the cone valve is in arc transition.
3. The cone valve and valve seat mating structure of a reciprocating pump of claim 1, wherein: the cross section of valve leg is oval, and oval major axis corresponds with the axis of cone valve, and oval minor axis is perpendicular with the axis of cone valve.
4. A cone valve and valve seat mating structure for a reciprocating pump as defined in claim 3, wherein: the valve legs are uniformly distributed and connected on a sleeve in the circumferential direction, the lower parts of the valve leg connecting parts are transited to the small-diameter section through a step surface, the sleeve is sleeved on the small-diameter section, the upper end surface of the sleeve is abutted to the step surface and butt-welded, and the bottom edge of the small-diameter section is fixedly welded with the sleeve in a circle.
5. The cone valve and valve seat mating structure of a reciprocating pump of claim 1, wherein: the sealing rubber sheath is sleeved outside the gland.
6. The cone valve and valve seat mating structure of a reciprocating pump of claim 5, wherein: the lower part of the outer circumferential surface of the gland forms a circle of annular gap inwards along the radial direction, and the sealing rubber is arranged in the annular gap; the outer circumferential surface of the sealing rubber is matched with the sealing surface of the valve seat.
7. The cone valve and valve seat mating structure of a reciprocating pump of claim 6, wherein: and a plurality of conical grooves are formed in the contact surface of the conical valve and the sealing rubber.
8. The cone valve and valve seat mating structure of a reciprocating pump of claim 1, wherein: two sealing ring grooves are formed in the outer circumferential surface of the valve seat, and sealing rings are arranged in the sealing ring grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210068901.9A CN114382904B (en) | 2022-01-20 | 2022-01-20 | Cone valve and valve seat matching structure of reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210068901.9A CN114382904B (en) | 2022-01-20 | 2022-01-20 | Cone valve and valve seat matching structure of reciprocating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114382904A CN114382904A (en) | 2022-04-22 |
| CN114382904B true CN114382904B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210068901.9A Active CN114382904B (en) | 2022-01-20 | 2022-01-20 | Cone valve and valve seat matching structure of reciprocating pump |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206694599U (en) * | 2017-03-30 | 2017-12-01 | 陕西航天动力高科技股份有限公司 | Inner elements of check valve and check valve |
| CN211117803U (en) * | 2019-08-05 | 2020-07-28 | 钟浩杰 | Check valve core assembly with long service life |
| CN212536671U (en) * | 2020-06-04 | 2021-02-12 | 青岛天时油气装备服务集团有限公司 | Modular valve seat barrel of slurry pump |
| CN213954352U (en) * | 2020-11-11 | 2021-08-13 | 段宏康 | Pump valve of reciprocating pump in field of petroleum engineering equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190120389A1 (en) * | 2017-10-24 | 2019-04-25 | Kerr Machine Co. | Fluid End Valve With Dual Inserts |
| US10400764B2 (en) * | 2016-04-15 | 2019-09-03 | S.P.M. Flow Control, Inc. | Well service valve seat removal |
-
2022
- 2022-01-20 CN CN202210068901.9A patent/CN114382904B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206694599U (en) * | 2017-03-30 | 2017-12-01 | 陕西航天动力高科技股份有限公司 | Inner elements of check valve and check valve |
| CN211117803U (en) * | 2019-08-05 | 2020-07-28 | 钟浩杰 | Check valve core assembly with long service life |
| CN212536671U (en) * | 2020-06-04 | 2021-02-12 | 青岛天时油气装备服务集团有限公司 | Modular valve seat barrel of slurry pump |
| CN213954352U (en) * | 2020-11-11 | 2021-08-13 | 段宏康 | Pump valve of reciprocating pump in field of petroleum engineering equipment |
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| Publication number | Publication date |
|---|---|
| CN114382904A (en) | 2022-04-22 |
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