阅读说明：本技术 一种球阀 (Ball valve ) 是由 不公告发明人 于 2020-05-21 设计创作，主要内容包括：本发明公开了一种球阀,包括阀杆套、阀杆和阀芯,阀杆包括杆部、键部和径向凸出部,杆部至少部分位于阀杆套的轴向通孔,键部至少部分位于阀芯的凹槽,径向凸出部自键部朝径向凸出,径向凸出部凸出于杆部；阀杆套的下段包括轴向限位部和径向限位部,径向凸出部能够与径向限位部抵接限制阀杆的转动行程,径向凸出部能够与轴向限位部抵接限制阀杆轴向向上脱出。本方案优化了球阀的止动结构,相对于背景技术取消了定位销,无需加工定位销孔,降低了阀杆的加工难度。(The invention discloses a ball valve, which comprises a valve rod sleeve, a valve rod and a valve core, wherein the valve rod comprises a rod part, a key part and a radial bulge part, the rod part is at least partially positioned in an axial through hole of the valve rod sleeve, the key part is at least partially positioned in a groove of the valve core, the radial bulge part radially bulges from the key part, and the radial bulge part bulges out of the rod part; the hypomere of valve rod cover includes the spacing portion of axial and radial spacing portion, and radial bulge can restrict the rotation stroke of valve rod with radial spacing portion butt, and radial bulge can upwards deviate from with the spacing portion butt restriction valve rod axial of axial. The locking structure of ball valve has been optimized to this scheme, has cancelled the locating pin for the background art, need not to process the locating pin hole, has reduced the processing degree of difficulty of valve rod.)

1. The ball valve is characterized by comprising a shell, a valve rod sleeve, a valve rod and a valve core, wherein the shell is fixedly connected with the valve rod sleeve, and the valve core is arranged in an inner cavity of the shell ball valve;

the valve rod comprises a rod part, a key part and a radial protruding part, wherein at least part of the rod part is positioned in the axial through hole of the valve rod sleeve, at least part of the key part is positioned in the groove of the valve core, the valve rod can drive the valve core to rotate, the radial protruding part protrudes from the key part towards the radial direction, and the radial protruding part protrudes out of the rod part; the lower section of the valve rod sleeve comprises an axial limiting part and a radial limiting part, the radial protruding part can be abutted against and limited by the radial limiting part to limit the rotating stroke of the valve rod, and the radial protruding part can be abutted against and limited by the axial limiting part to limit the valve rod to axially and upwards separate.

2. The ball valve according to claim 1, wherein the stem sleeve includes a large diameter section and a small diameter section, an outer diameter of the large diameter section is larger than an outer diameter of the small diameter section, the small diameter section includes a lower end portion and an axial projecting portion projecting axially downward from the lower end portion, the lower end portion serves as the axial stopper portion, the axial projecting portion serves as the radial stopper portion, the housing includes a body portion and an extension portion extending from a circumferential outer wall of the body portion, the body portion and the extension portion are tubular, the small diameter section is located at least partially in the extension portion, and the extension portion is fixedly connected to the small diameter section.

3. The ball valve of claim 2, wherein the axial projection includes a first sidewall and a second sidewall, and wherein a plane of the first sidewall and a plane of the second sidewall form an angle θ of 90 degrees.

4. The ball valve according to claim 3, further comprising a bonnet, a seal ring, wherein an outer wall of the large diameter section includes an externally threaded portion, wherein an inner wall of the bonnet includes an internally threaded portion, wherein the bonnet is threadably coupled to the stem sleeve, wherein an upper section of the large diameter section includes a first tapered portion having an outer diameter that decreases away from the valve plug, wherein the bonnet further includes an inner stepped portion having a downward facing step, and wherein the seal ring is located between the inner stepped portion and the first tapered portion.

5. The ball valve of claim 3, wherein the lower section of the large diameter section includes a second tapered portion having an outer diameter that increases away from the valve spool.

6. The ball valve of claim 1, wherein the groove is a through groove, the groove bottom of the groove is a flat bottom, the key portion is a flat bottom, a gap is formed between the key portion and the groove bottom, the gap is defined as a, and the size of the key portion extending into the groove is B, so that a is less than or equal to B/2.

7. The ball valve of claim 1, wherein the valve stem includes a stem and a connecting member, a lower section of the stem including a radially extending transverse slot, an upper section of the connecting member including a boss located in the transverse slot, the stem including the stem, and the connecting member including the key and the radial projection.

8. The ball valve of claim 7, wherein the rod further includes a locating hole, the connector further includes a locating rod, the locating rod is located in the locating hole, the rod is machined from a stainless steel material, and the connector is made from a metal powder metallurgy.

9. The ball valve of any of claims 1-8, further comprising a second valve seat, a first gasket, and a second gasket, the spool positioned between the first valve seat and the second valve seat, the first gasket positioned between the first valve seat and the spool, the second gasket positioned between the second valve seat and the spool, the lower section of the spool including a land portion positioned between the first gasket and the second gasket.

10. The ball valve according to claim 9, wherein the outer wall of the first valve seat includes a first stepped portion, the outer wall of the second valve seat includes a second stepped portion, the first stepped portion is disposed opposite to the second stepped portion, one end of the housing is disposed at the first stepped portion, and the other end of the housing is disposed at the second stepped portion.

Technical Field

The invention relates to the technical field of fluid control, in particular to a ball valve.

Background

Fig. 1 is a schematic partial structure diagram of a ball valve in the background art. As shown in fig. 1, the ball valve includes a housing 01, a valve rod 02 and a positioning pin 03, a limiting boss 011 is arranged at the upper end of the housing 01, the positioning pin 03 transversely penetrates through the valve rod 02, and the positioning pin 03 abuts against the limiting boss 011 to limit the circumferential movement stroke of the valve rod 02. The ball valve in the background art is stopped by matching the positioning pin 03 with the limiting boss 011, the positioning pin 03 is generally manually pressed into a positioning pin hole 021 of the valve rod 02, the requirement on the size precision of the positioning pin hole 021 is high, and the processing difficulty of the valve rod 02 is high.

In view of the above, how to reduce the processing difficulty of the valve rod is a technical problem that those skilled in the art continuously pay attention to.

Disclosure of Invention

The invention aims to provide a ball valve which comprises a shell, a valve rod sleeve, a valve rod and a valve core, wherein the shell is fixedly connected with the valve rod sleeve, and the valve core is arranged in an inner cavity of the shell ball valve; the valve rod comprises a rod part, a key part and a radial protruding part, wherein at least part of the rod part is positioned in the axial through hole of the valve rod sleeve, at least part of the key part is positioned in the groove of the valve core, the valve rod can drive the valve core to rotate, the radial protruding part protrudes from the key part towards the radial direction, and the radial protruding part protrudes out of the rod part; the lower section of the valve rod sleeve comprises an axial limiting part and a radial limiting part, the radial protruding part can be abutted against and limited by the radial limiting part to limit the rotating stroke of the valve rod, and the radial protruding part can be abutted against and limited by the axial limiting part to limit the valve rod to axially and upwards separate.

The invention provides a ball valve, which comprises a valve rod sleeve, a valve rod and a valve core, wherein the valve rod comprises a rod part, a key part and a radial bulge part, the rod part is at least partially positioned in an axial through hole of the valve rod sleeve, the key part is at least partially positioned in a groove of the valve core, the radial bulge part radially bulges from the key part, and the radial bulge part bulges out of the rod part; the hypomere of valve rod cover includes the spacing portion of axial and radial spacing portion, and radial bulge can restrict the rotation stroke of valve rod with radial spacing portion butt, and radial bulge can upwards deviate from with the spacing portion butt restriction valve rod axial of axial. The locking structure of ball valve has been optimized to this scheme, has cancelled the locating pin for the background art, need not to process the locating pin hole, has reduced the processing degree of difficulty of valve rod.

Drawings

FIG. 1: a schematic partial structure diagram of a ball valve in the background art;

FIG. 2: the invention provides a schematic cross-sectional view of a ball valve;

FIG. 3 a: FIG. 2 is a schematic view of the stem sleeve;

FIG. 3 b: FIG. 3a is an inverted schematic view of the valve stem sleeve;

FIG. 4: FIG. 2 is a schematic illustration of the valve stem configuration;

FIG. 5: FIG. 2 is a schematic illustration of the valve stem and stem sleeve mating;

FIG. 6: the structure of the valve core in FIG. 2 is schematic;

FIG. 7: FIG. 2 is a schematic illustration of the valve stem, stem sleeve and valve cartridge mated together;

FIG. 8: FIG. 7 is an enlarged schematic view at I;

FIG. 9: another structure schematic diagram of the valve rod;

FIG. 10: FIG. 9 is a schematic view of the structure of the rod;

FIG. 11: fig. 9 is a schematic view of the structure of the connector.

In fig. 2 to 11:

1-shell, 100-lumen;

11-body portion, 12-extension portion;

2-first valve seat, 21-first step;

2 '-second valve seat, 21' -second stepped portion;

22-flow path inlet, 22' -flow path outlet;

3-valve rod sleeve, 30-axial through hole;

31-large diameter section, 32-small diameter section and 321-lower end part;

311-external threaded portion, 312-first tapered portion, 313-second tapered portion;

33-axial projection, 331-first side wall, 332-second side wall;

4/4' -valve stem, 41-stem, 42-key;

41' -rod part, 411' -positioning hole and 412 ' -transverse groove;

42' -connecting piece, 421 ' -boss and 422 ' -positioning rod;

43-a radial projection;

5-valve core, 51-groove, 511-groove bottom, 52-platform part;

6-valve cap, 61-internal thread part, 62-internal step part;

7-sealing ring, 8-first sealing gasket, 8' -second sealing gasket.

Detailed Description

The core of the invention is to provide a ball valve, which comprises a valve rod sleeve, a valve rod and a valve core, wherein the valve rod comprises a rod part, a key part and a radial bulge part; the hypomere of valve rod cover includes the spacing portion of axial and radial spacing portion, and radial bulge can restrict the rotation stroke of valve rod with radial spacing portion butt, and radial bulge can upwards deviate from with the spacing portion butt restriction valve rod axial of axial. The locking structure of ball valve has been optimized to this scheme, has cancelled the locating pin for the background art, need not to process the locating pin hole, has reduced the processing degree of difficulty of valve rod.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It should be noted that the terms "upper" and "lower" as used herein are defined in the drawings and the positions of the components in fig. 2 to 11, respectively, only for the sake of clarity and convenience. It is to be understood that the directional terms used herein are not intended to limit the scope of the claims.

FIG. 2 is a schematic cross-sectional view of a ball valve according to the present invention; FIG. 3a is a schematic structural view of the valve stem sleeve of FIG. 2; FIG. 3b is an inverted schematic view of the valve stem sleeve of FIG. 3 a; FIG. 4 is a schematic illustration of the valve stem of FIG. 2; FIG. 5 is a schematic illustration of the valve stem of FIG. 2 mated with a valve stem sleeve; FIG. 6 is a schematic structural view of the valve cartridge of FIG. 2; FIG. 7 is a schematic illustration of the valve stem, stem sleeve and valve cartridge of FIG. 2 in mating relationship; fig. 8 is an enlarged schematic view at I in fig. 7.

As shown in fig. 2 to 8, the ball valve includes a housing 1, a first valve seat 2, a second valve seat 2', a stem housing 3, a stem 4, and a valve core 5. The housing 1 is tubular and includes a main body 11 and a projecting portion 12, and the projecting portion 12 projects from a circumferential outer wall of the main body 11. Specifically, the main body 11 is formed by punching and drawing a stainless steel pipe or plate, and the protruding portion 12 is formed by punching, flanging and drawing the main body 11.

The first valve seat 2 and the second valve seat 2 'are formed by forging stainless steel section, the valve core 5 is located between the first valve seat 2 and the second valve seat 2', the peripheral wall of the first valve seat 2 comprises a first step part 21, the peripheral wall of the second valve seat 2 'comprises a second step part 21', the first step part 21 and the second step part 21 'are oppositely arranged, namely, the step surface of the first step part 21 is opposite to the step surface of the second step part 21'. One end of the housing 1 is disposed on the first step portion 21, the other end of the housing 1 is disposed on the second step portion 21 ', and the first valve seat 2 and the second valve seat 2' are welded and fixed with the housing 11. The first valve seat 2 comprises a flow path inlet 22, the second valve seat 2 'comprises a flow path outlet 22', a first gasket 8 is arranged between the first valve seat 2 and the valve element 5, and a second gasket 8 'is arranged between the second valve seat 2' and the valve element 5.

The valve rod sleeve 3 is approximately circular and is formed by turning stainless steel sectional materials. Valve rod cover 3 includes axial extension's axial through hole 30, and valve rod 4 runs through this axial through hole 30, and valve rod 4 and 5 keyway connections of case, valve rod 4 can drive case 5 and rotate. The valve rod sleeve 3 comprises an upper section and a lower section, wherein in the embodiment, the upper section is a large-diameter section 31, the lower section is a small-diameter section 32, and the outer diameter of the large-diameter section 31 is larger than that of the small-diameter section 32. The large diameter section 31 serves as an upper section, the small diameter section 32 serves as a lower section, the small diameter section 32 is at least partially positioned in the protruding portion 12 of the shell 1, and the outer wall of the small diameter section 32 is welded and fixed with the inner wall of the protruding portion 12. The small diameter section 32 includes a lower end 321 and an axial protrusion 33 axially protruding downward from the lower end 321, the axial protrusion 33 includes a first side wall 331 and a second side wall 332, an included angle formed by a plane of the first side wall 331 and a plane of the second side wall 332 is 90 degrees, the number of the axial protrusions 33 is 2, and the axial protrusions are symmetrically arranged with respect to a central axis of the axial through hole 30. In this embodiment, the lower end 321 of the small diameter section 32 serves as an axial stopper, and the axial protrusion 33 serves as a radial stopper.

The valve rod 4 is made of stainless steel bar material by integral turning, and comprises a rod part 41, a key part 42 and a radial bulge part 43, wherein the key part 42 is positioned below the rod part 41. The rod portion 41 is cylindrical, the rod portion 41 penetrates through the axial through hole 30 of the valve stem sleeve 3, and the rod portion 41 is at least partially located in the axial through hole 30. The key 42 is at least partially located in the groove 51 of the valve core 5, and the valve core 5 can be driven to rotate by the rotation of the valve rod 4. The radial protrusion 43 protrudes radially from the key portion 42, the radial protrusion 43 protrudes from the outer peripheral wall of the stem portion 41, the radial protrusion 43 can abut against the first side wall 331 or the second side wall 332 of the axial protrusion 33 (radial limiting portion) to limit the rotation stroke of the valve rod 4, and the radial protrusion 43 can abut against the lower end 321 (axial limiting portion) of the small diameter section 32 to limit the axial upward release of the valve rod 4.

In this embodiment, an axial limiting portion and a radial limiting portion are disposed on a lower section of the valve rod sleeve 3, the valve rod 4 includes a rod portion 41, a key portion 42 and a radial protruding portion 43, at least a portion of the rod portion 41 is located in the axial through hole 30 of the valve rod sleeve 3, at least a portion of the key portion 42 is located in the groove 51 of the valve core 5, the radial protruding portion 43 protrudes out of the outer peripheral wall of the rod portion 41, the radial protruding portion 43 can abut against the first side wall 331 or the second side wall 332 of the axial protruding portion 33 (the radial limiting portion) to limit the rotation stroke of the valve rod 4, and the radial protruding portion 43 can abut against the lower end portion 321 (the axial limiting portion) of the small diameter portion 32 to limit the axial upward release of the valve rod 4. The scheme optimizes the stop structure of the ball valve, and compared with the background technology, a positioning pin is omitted, and a positioning pin hole does not need to be processed on the valve rod 4, so that the processing difficulty of the valve rod is reduced; on the other hand, the length of the valve rod 4 can be shortened, which is advantageous for miniaturization.

Further, as shown in fig. 2, 3a and 3b, the globe valve further includes a bonnet 6 and a sealing ring 7. The outer wall of the large diameter section 31 of the stem cover 3 includes an external thread portion 311, and the inner wall of the bonnet 6 includes an internal thread portion 61, and the bonnet 6 is fixedly coupled to the stem cover 3 by screwing the external thread portion 311 into the internal thread portion 61. The upper section of the large diameter section 31 includes a first tapered portion 312, and the outer diameter of the first tapered portion 312 decreases away from the valve body 5, i.e., the tapered surface thereof is substantially toward the bonnet 6. The bonnet 6 further comprises an inner step portion 62 with a downward step surface, the sealing ring 7 is located between the inner step portion 62 and the first tapered portion 312, and the sealing performance of the ball valve is improved by tightening the bonnet 6 to press the sealing ring 7 to the first tapered portion 312.

Further, the lower section of the large diameter section 31 includes a second tapered portion 313, and the second tapered portion 313 has an outer diameter gradually increasing in a direction away from the valve body 5, that is, a tapered surface thereof is substantially directed toward the valve body 5. In this way, by providing the second tapered portion 313, a weld ring (not shown) is easily inserted between the upper end of the protruding portion 12 of the housing 1 and the second tapered portion 313 along the tapered surface of the second tapered portion 313 during the ball valve manufacturing process, so that the weld ring is easily installed, and the production efficiency is improved.

FIG. 9 is a schematic view of an alternative valve stem configuration; FIG. 10 is a schematic view of the rod assembly of FIG. 9; fig. 11 is a schematic structural view of the connector of fig. 9.

As shown in fig. 9, 10, and 11, the valve stem may be provided in a split structure. The valve stem 4 ' includes a rod 41' and a connecting member 42', the rod 41 being provided to the rod 41', and the key 42 and the radial projection 43 being provided to the connecting member 42 '. Specifically, the lower section of the rod member 41 'is provided with a transverse groove 412', the upper section of the connecting member 42 'is provided with a boss 422', the rod member 41 'and the connecting member 42' are connected with the boss 422 'through the transverse groove 412', and the rod member 41 'can drive the connecting member 42' to rotate. Further, in order to make the rod 41 'and the connecting member 42' more reliably located in a matching manner, the rod 41 'is further provided with an axial positioning hole 411', and correspondingly, the connecting member 42 'is provided with a positioning rod 421' at an upper section thereof, and the positioning rod 421 'is located in the positioning hole 411'. In this embodiment, the rod member 41 'is machined from stainless steel bar stock and the connecting member 42' is integrally formed from metal powder metallurgy. So design, compare the integrative car processing scheme of valve rod in the above-mentioned embodiment, the scheme of this embodiment can reduce material cost.

In this embodiment, as shown in fig. 7 and 8, the groove bottom 511 of the groove 51 is configured as a flat bottom, and correspondingly, the key portion 42 of the valve rod 4 engaged therewith is also configured as a flat bottom, i.e., the key portion 42 is a flat bottom. With the arrangement, the ball valve is beneficial to the displacement of the valve core 5 towards the flow path outlet 22 'under the action of fluid pressure difference in a valve closing state, so that the second sealing gasket 8' is pressed to improve the sealing property; on the other hand, the valve core 5 is not easy to shake, and the first sealing gasket 8 and the second sealing gasket 8 'matched with the valve core 5 cannot be scratched due to shaking of the valve core 5, so that the service lives of the first sealing gasket 8 and the second sealing gasket 8' can be prolonged.

Furthermore, as shown in FIG. 8, in the present embodiment, a gap A is provided between the key portion 42 and the bottom 511 of the groove 51, and the dimension B defining the key portion 42 extending into the groove 51 satisfies A ≦ B/2. By such arrangement, the action reliability of the ball valve during opening and closing can be improved.

As shown in fig. 2, the lower section of the valve body 5 has a land portion 52, and the land portion 52 is located between the first gasket 8 and the second gasket 8'. Therefore, on one hand, the material cost of the valve core 5 is reduced, and the weight of the valve core 5 is reduced, on the other hand, the height reduction of the valve core 5 is convenient for the valve core 5 to be installed in the shell 1, and is also beneficial to reducing the overall height of the ball valve and realizing miniaturization.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.