CN111365491A - Full-lining ceramic three-way ball valve and valve ball structure thereof - Google Patents

Full-lining ceramic three-way ball valve and valve ball structure thereof Download PDF

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Publication number
CN111365491A
CN111365491A CN202010262611.9A CN202010262611A CN111365491A CN 111365491 A CN111365491 A CN 111365491A CN 202010262611 A CN202010262611 A CN 202010262611A CN 111365491 A CN111365491 A CN 111365491A
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China
Prior art keywords
valve
ball
lining
ceramic
valve rod
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Pending
Application number
CN202010262611.9A
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Chinese (zh)
Inventor
李中庆
王海龙
乔桂荣
李振福
肖佐华
宋建生
赵玲
赵艳艳
李泽锦
李泽昊
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Zhengzhou Xinyuyuan Machinery Industrial Co ltd
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Zhengzhou Xinyuyuan Machinery Industrial Co ltd
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Application filed by Zhengzhou Xinyuyuan Machinery Industrial Co ltd filed Critical Zhengzhou Xinyuyuan Machinery Industrial Co ltd
Priority to CN202010262611.9A priority Critical patent/CN111365491A/en
Publication of CN111365491A publication Critical patent/CN111365491A/en
Pending legal-status Critical Current

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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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
    • F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
    • F16K11/0873—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0647—Spindles or actuating means
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0657—Particular coverings or materials
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/205—Sealing effected by the flowing medium

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

A full-lining ceramic three-way ball valve comprises a valve body, a valve seat and a valve ball, wherein the valve body is internally provided with a valve cavity and a flow passage, the inner wall of the valve cavity is sleeved with a valve cavity lining, the inner wall of the flow passage is sleeved with a flow passage lining, the valve cavity lining and the flow passage lining are ceramic linings, and the valve seat is a ceramic valve seat; the ball valve is a ceramic ball valve, the upper part of the ball valve is provided with a valve rod connecting hole which is vertically communicated with a central flow passage of the ball valve, the valve rod connecting hole is matched with an upper valve rod in a sleeved mode, a ball valve lining is sleeved in the central flow passage of the ball valve, the lower end of the upper valve rod is attached to the ball valve lining in a contacted mode, and the ball valve is high in hardness and abrasion resistant and can prevent the upper ball part of the ceramic ball valve from being suddenly subjected to torsion from the valve rod to be instantaneously fractured.

Description

Full-lining ceramic three-way ball valve and valve ball structure thereof
Technical Field
The invention relates to the technical field of ball valves, in particular to a full-lining ceramic three-way ball valve and a ball structure thereof.
Background
A ball valve is a pipe element that controls the movement of a fluid. Most of the existing valve bodies, valve seats and valve balls are made of metal, and when the fluid is high-temperature fluid or acid-base fluid with strong corrosivity, the metal valve balls and the inner walls of the valve bodies are easily corroded by the fluid, so that the sealing performance between the valve seats and the valve balls is reduced, and the flow blocking effect cannot be achieved.
Ceramic ball valve has now, compares that metal ball valve ceramic ball valve is then more corrosion-resistant and high temperature, but still follow between valve rod and the valve ball with metal valve ball and the connection structure of valve rod, closely cooperate the suit between valve rod and the ball groove promptly, make the valve rod drive the valve ball and rotate. The problem is that when the valve ball is replaced with a ceramic structure, although the hardness increase is also more resistant to high temperatures, other problems can result: because the ductility and the ductility of the metal material are good, but the opposite ceramics show brittleness and are limited by the structure, the valve rod can only be connected with the upper part of the valve ball, after the valve rod is subjected to the torsion action, the ceramic valve ball only at the upper end part is subjected to the torsion, and the ceramic valve ball at the lower part is subjected to the pressure and the friction force from the valve seat, so that the upper part and the lower part of the valve ball are easy to break at the moment of the larger torsion of the valve rod. In particular to a three-way or four-way ball valve, the side holes of the valve ball are large in quantity, the cavity area is large, the middle part connected with the upper end and the lower end of the valve ball is thinner, and stress is more easily concentrated on the upper part of the valve ball to cause the fracture of the upper part and the lower part.
Disclosure of Invention
The invention aims to provide a full-lining ceramic three-way ball valve and a ball structure thereof, and aims to solve the problem that the upper part and the lower part of a ceramic ball valve in the prior art are easy to break.
In order to solve the problems, the invention relates to a full-lining ceramic three-way ball valve and a ball structure thereof, which adopt the following technical scheme:
the utility model provides a valve ball structure, includes the valve ball, the valve ball is ceramic valve ball, offers the valve rod that link up perpendicularly with valve ball center flow channel on the upper portion of valve ball and connects the hole, the valve rod connects the hole and goes up the valve rod suit of matcing each other, overlaps in valve ball center flow channel and is equipped with the valve ball inside lining, the lower extreme of going up the valve rod pastes with the valve ball inside lining and touches.
In the valve ball structure, the lower end of the upper valve rod is integrally provided with the torque transmission end surface, the torque transmission end surface is a cylindrical end surface, and the radian of the torque transmission end surface is consistent with that of the outer side wall of the valve ball lining.
In the valve ball structure, the valve ball comprises the metal valve core and the ceramic coating coated on the outer surface of the metal valve core, the valve rod connecting hole is replaced by the valve rod connecting groove, the valve rod connecting groove is not communicated with the valve ball central flow passage, and the lower end of the upper valve rod is contacted with the groove bottom of the valve rod connecting groove in a sticking manner.
A full-lining ceramic three-way ball valve comprises a valve body, a valve seat and the valve ball structure as claimed in any one of claims 1 to 3, wherein a valve cavity and a flow channel are arranged in the valve body, a valve cavity lining is sleeved on the inner wall of the valve cavity, a flow channel lining is sleeved on the inner wall of the flow channel, the valve cavity lining and the flow channel lining are ceramic linings, and the valve seat is a ceramic valve seat.
The lower end of the valve ball in the valve body is provided with the lower valve rod, the end part of the lower valve rod extends into the limiting groove of the lower spherical surface of the valve ball, the groove bottom of the limiting groove is pressed and contacted with the end part of the lower valve rod, and meanwhile, floating gaps are formed between the front inner wall and the rear inner wall of the limiting groove and the rod wall of the lower valve rod respectively, so that the lower valve rod can move forwards and backwards in the limiting groove along the flowing direction of fluid.
In the fully-lined ceramic three-way ball valve, the lower valve rod is a cylindrical rod, the limiting groove is a kidney-shaped groove, inner walls of two sides of the kidney-shaped groove are parallel to the flowing direction of fluid, and inner walls of two ends of the kidney-shaped groove are in a semicircular shape consistent with the radian of the cylindrical rod.
The invention has the following beneficial effects:
1. the valve ball adopts the ceramic valve ball, and keeps the characteristics of wear resistance and high hardness of the ceramic valve ball, and the key point is that the slot at the upper end of the ceramic valve ball is changed into the jack penetrating through the upper part of the whole valve ball, and the upper valve rod is sleeved in the jack at the upper part of the valve ball. For the ceramic ball valve, the weakness that the plasticity of the ceramic is lower than that of metal is effectively made up, and the upper ball part of the ceramic ball valve is prevented from being instantaneously fractured by the torsion from the valve rod suddenly.
2. The invention adds the ceramic valve ball lining in the central flow passage of the ceramic valve ball, which has two functions, on one hand, the ceramic valve ball lining is matched with the upper valve rod, the lower end surface of the upper valve rod is designed into a cylindrical surface with the radian consistent with that of the valve ball lining, the upper valve rod encircles the outer side wall of the valve ball lining, when the valve rod is twisted, the valve ball can be driven to rotate, the valve ball lining can be pulled to synchronously rotate, and conversely, the rotation of the valve ball lining can react on the lower ball part of the ceramic valve ball, so that the upper ball part of the valve ball and the ball valve lining jointly drive the lower ball part of the valve ball to simultaneously rotate, and the valve ball lining is positioned in the center of the whole valve ball, partial torsion of the valve rod can be uniformly transmitted to the whole valve ball through the lining, the valve ball is equivalently subjected to the torsion from the center of the valve ball, the torsion between the upper ball part and the lower ball part of the valve ball is equivalent, and the layer fracture caused by uneven stress on the upper part and the lower part of the ball body can be effectively avoided.
3. The inner wall of the valve cavity and the inner wall of the flow passage are respectively sleeved with a ceramic valve cavity lining, and when high-temperature or highly corrosive fluid flows through the ball valve, the fluid is in contact with the ceramic lining and the ceramic valve seat, so that the valve body is protected from being in contact.
4. Add lower valve rod, utilize the clearance that floats between valve rod and the spacing groove, when blocking the fluid, can allow the valve ball to take place the unsteady of small distance, make the fluid sealed on the disk seat of valve ball rear end, make the inside fluid that is full of ball valve, offset each other with outside fluid pressure, protection ball valve itself, lower valve rod provides ascending holding power to the valve ball simultaneously, make the valve ball support ground that floats more stable, prevent that the nonstandard aversion from appearing in the valve ball, guarantee the better leakproofness of valve ball and disk seat.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a front view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a side view of the present invention.
Fig. 4 is a schematic structural diagram of the valve ball and the upper valve rod.
Fig. 5 is a cross-sectional view taken along line a-a' of fig. 4.
Fig. 6 is a schematic structural view of the valve ball in embodiment 2.
FIG. 7 is a schematic structural view of embodiment 3.
The reference numbers in the figures illustrate: 1-valve body, 2-valve seat, 3-valve ball, 31-metal valve core, 32-ceramic coating, 4-valve rod connecting hole, 5-upper valve rod, 6-torque transfer end face, 7-valve ball central flow passage, 8-valve ball lining, 10-valve rod connecting groove, 11-valve cavity, 12-flow passage, 13-valve cavity lining, 14-flow passage lining, 15-lower valve rod, 16-limiting groove and 17-floating gap.
Detailed Description
In order to make the technical purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are further described below with reference to the accompanying drawings and specific embodiments.
Example 1:
a full-lining ceramic three-way ball valve is shown in figures 1-3 and comprises a valve body 1, a valve seat 2 and a valve ball 3, wherein a valve cavity 11 and a flow channel 12 are arranged in the valve body, a valve cavity lining 13 is sleeved on the inner wall of the valve cavity through precision machining, a flow channel lining 14 is sleeved on the inner wall of the flow channel through precision machining, the valve cavity lining and the flow channel lining are both ceramic linings, the valve seat 2 is a ceramic valve seat, the valve cavity lining 13, the flow channel lining 14 and the valve seat form a layer of complete lining, and when high-temperature or high-corrosivity fluid flows through the ball valve, the fluid is in contact with the ceramic lining and the ceramic valve seat, so that the valve body 1.
The valve ball 3 is a ceramic valve ball, and the interior of the ceramic is bonded by covalent bonds, so that the bonding force is strong, and the ceramic has high hardness and has the characteristics of wear resistance and high hardness. But at the same time the hardness and plasticity of the material are mutually exclusive. Although ceramics is harder than metals bonded by metal bonds, ceramics is more ductile than metals, and therefore, in the case of a ceramic valve ball, when the ceramic valve ball 3 is subjected to a large torsional force, dislocation is hard to slip, and elastic deformation and plastic deformation are hard to occur, so that instantaneous fracture is likely to occur between the upper ball part and the lower ball part of the valve ball 3. Therefore, the invention changes the slot at the upper end of the valve ball in the prior art into the jack penetrating through the upper part of the whole valve ball, the upper part of the valve ball is provided with the valve rod connecting hole 4 vertically penetrating with the central flow passage of the valve ball, the valve rod connecting hole 4 and the upper valve rod 5 are mutually matched and sleeved, and the upper valve rod 5 is sleeved in the valve rod connecting hole 4 at the upper part of the valve ball. The depth of the upper valve rod 5 sleeved in the valve ball 3 is increased, for the spherical valve ball, the closer to the center of the valve ball 3, the thicker the valve ball around the valve rod connecting hole 4 is, therefore, after the slot is changed to penetrate through the valve rod connecting hole 4 on the upper part of the whole valve ball, for the spherical valve ball 3, the thickness of the valve ball 3 corresponding to the inner wall surface directly subjected to the torsion of the upper valve rod 5 can be obviously increased, therefore, the fracture critical torsion value which can be born by the whole valve ball 3 can also be obviously increased, after the test after the actual processing, the fracture critical torsion value is increased to 1.6-2 times of the original value (the slot is formed at the upper end of the ceramic valve ball), and the fracture resistance of the ceramic valve ball is obviously improved.
In addition, after the slot at the upper end of the valve ball in the prior art is changed to penetrate through the valve rod connecting hole 4 at the upper part of the valve ball, the depth of the inner wall surface of the valve ball 3, which is contacted with the upper valve rod 5, is increased. When the upper valve rod 5 rotates, the torsion of the upper valve rod 5 can be transmitted to the contact inner wall surface of the valve rod connecting hole 4 with a larger area, and then is transmitted to the valve ball 3 uniformly, so that the upper ball part of the valve ball 3 integrally generates the torsion to drive the lower ball part of the valve ball to rotate, and the phenomenon of stress concentration of the upper ball part of the valve ball 3 is weakened. For the ceramic ball valve, on the basis of keeping the characteristics of wear resistance and high hardness of the ceramic ball valve, the invention effectively makes up the weakness that the plasticity of the ceramic is lower than that of metal, and achieves the purpose of preventing the upper ball part of the ceramic ball valve 3 from being suddenly subjected to the torsion from the upper valve rod 5 to generate instantaneous fracture.
Meanwhile, a ball liner 8 is sleeved in the ball central flow passage 7, as shown in fig. 4-5, a torque transfer end surface 6 is integrally designed at the lower end of the upper valve rod 5, the torque transfer end surface is a cylindrical end surface, the radian of the torque transfer end surface 6 is consistent with that of the outer side wall of the ball liner 8, the torque transfer end surface 6 at the lower end of the upper valve rod 5 is attached to the ball liner 8, and the torque transfer end surface 6 of the upper valve rod 5 surrounds the outer side wall of the ball liner 8.
On one hand, the ball lining 8 is matched with the torsion transfer end surface of the upper valve rod 5, the torsion transfer end surface 6 of the upper valve rod 5 encircles the outer side wall of the ball lining 8, when the upper valve rod 5 is twisted, the valve ball 3 is driven to rotate, the valve ball lining 8 is pulled to synchronously rotate, and conversely, the rotation of the valve ball lining 8 can react with the lower ball part of the ceramic valve ball 3, so that the upper ball part of the valve ball 3 and the ball valve lining jointly drive the lower ball part of the valve ball to simultaneously rotate, and the ball lining 8 is positioned at the center of the whole valve ball 3, the partial torsion of the upper valve rod 5 can be evenly transmitted to the whole valve ball 3 through the ball lining 8, the valve ball is equivalently subjected to the torsion from the center of the valve ball, therefore, the torsion between the upper ball part and the lower ball part of the valve ball 3 is equivalent, and the layer fracture caused by uneven stress on the upper part and the lower part of the valve ball 3 can be effectively avoided. On the other hand, the torque transmission end surface 6 at the lower end of the upper valve rod 5 is contacted with the valve ball lining 8, so that the fluid in the valve ball central flow passage 7 can be prevented from leaking from the upper valve rod 5.
Example 2: the following description will focus on differences from embodiment 1 in a fully lined ceramic three-way ball valve of the present embodiment.
As shown in fig. 5, in the present embodiment, the valve ball 3 is a metal valve ball whose outer surface is sprayed with a ceramic coating, that is, the valve ball includes a metal valve core 31 and a ceramic coating 32 coated on the outer surface of the metal valve core, a valve ball lining 8 is also sleeved in the central flow passage of the metal valve ball, and the ceramic coating 32 and the valve ball lining 8 are in direct contact with the fluid, thereby protecting the metal valve core 31 from the fluid. At this time, since the inside of the metal valve core 31 is bonded by a metal bond, when a large torsion is applied, the inside of the metal valve core 31 is elastically deformed and plastically deformed, so that the fracture critical torsion value of the metal valve core 31 is large. Therefore, in this embodiment, the valve rod connection hole 4 in the upper portion of the valve ball 3 still uses the valve rod connection groove 10 in the prior art, at this time, the valve rod connection groove 10 is not communicated with the central flow passage of the valve ball 3, and the lower end of the upper valve rod 5 is contacted with the groove bottom of the valve rod connection groove 10.
Example 3: the following description will focus on differences from embodiment 1 in a fully lined ceramic three-way ball valve of the present embodiment.
As shown in fig. 6, in the full-lining ceramic three-way ball valve of the present embodiment, a lower valve rod 15 is installed at the lower end of a valve ball 3 in a valve body 1, a limiting groove 16 is opened on the lower spherical surface of the valve ball 3, the upper end of the lower valve rod 15 extends into the limiting groove 16, and the groove bottom of the limiting groove 16 is pressed against the end of the lower valve rod 15, the valve ball 3 can be supported on the lower valve rod, and the lower valve rod 15 is limited in the limiting groove 16. The lower valve rod provides upward supporting force for the valve ball 3, so that the floating valve ball is supported more stably, the valve ball is prevented from nonstandard displacement, and better sealing performance between the valve ball 3 and the valve seat 2 is ensured. Meanwhile, floating gaps 17 are reserved between the front inner wall and the rear inner wall of the limiting groove 16 and the rod wall of the lower valve rod 15 respectively, namely the left side and the right side of the lower valve rod are in contact with the limiting groove, the lower valve rod 15 can only move back and forth in the limiting groove 16, and the lower valve rod can only move in the limiting groove along the flowing direction of the fluid. When the fluid is blocked, the valve ball can be allowed to float for a small distance, so that the fluid is sealed on the valve seat 2 at the rear end of the valve ball 3, the valve cavity 11 is filled with the fluid, the fluid and the external fluid pressure are mutually offset, and the ball valve is protected. In this embodiment, the lower valve rod 15 is a cylindrical rod, the limiting groove 16 is a kidney-shaped groove, and the inner walls of two sides of the kidney-shaped groove are parallel to the fluid flowing direction and contact with the outer wall of the lower valve rod 15, so that the lower valve rod 15 is ensured not to deviate in the process of moving forward and backward slightly. And the inner walls of the two ends of the kidney-shaped groove are in a semicircular shape consistent with the radian of the cylindrical rod, so that no edges and corners exist on the inner wall of the limiting groove 16, and dirt is not easy to accumulate.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto, and any equivalent substitutions and modifications or partial substitutions made without departing from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims (6)

1. A valve ball structure characterized by: the valve ball is a ceramic valve ball, a valve rod connecting hole vertically communicated with a valve ball central flow passage is formed in the upper portion of the valve ball, the valve rod connecting hole is matched with an upper valve rod in a sleeved mode, a valve ball lining is sleeved in the valve ball central flow passage, and the lower end of the upper valve rod is in contact with the valve ball lining.
2. The valve ball structure of claim 1, wherein: the lower extreme an organic whole of going up the valve rod is equipped with torsion transmission terminal surface, torsion transmission terminal surface is the cylindricality terminal surface to the radian of torsion transmission terminal surface is unanimous with the radian of valve ball inside lining lateral wall.
3. The valve ball structure of claim 1, wherein: the valve ball comprises a metal valve core and a ceramic coating coated on the outer surface of the metal valve core, the valve rod connecting hole is replaced by a valve rod connecting groove, the valve rod connecting groove is not communicated with a valve ball central flow passage, and the lower end of the upper valve rod is contacted with the bottom of the valve rod connecting groove in a contact mode.
4. The utility model provides a full lining pottery three-way ball valve which characterized in that: the ball valve comprises a valve body, a valve seat and the ball valve structure as claimed in any one of claims 1 to 3, wherein a valve cavity and a flow channel are arranged in the valve body, a valve cavity lining is sleeved on the inner wall of the valve cavity, a flow channel lining is sleeved on the inner wall of the flow channel, the valve cavity lining and the flow channel lining are ceramic linings, and the valve seat is a ceramic valve seat.
5. The fully lined ceramic three-way ball valve of claim 4, wherein: the lower end of the valve ball in the valve body is provided with a lower valve rod, the end part of the lower valve rod extends into a limiting groove of the lower spherical surface of the valve ball, the groove bottom of the limiting groove is pressed and contacted with the end part of the lower valve rod, and meanwhile, floating gaps are arranged between the front inner wall and the rear inner wall of the limiting groove and the rod wall of the lower valve rod respectively, so that the lower valve rod can move forwards and backwards in the limiting groove along the flowing direction of fluid.
6. The fully lined ceramic three-way ball valve of claim 5, wherein: the lower valve rod is a cylindrical rod, the limiting groove is a kidney-shaped groove, inner walls of two sides of the kidney-shaped groove are parallel to the flowing direction of fluid, and inner walls of two ends of the kidney-shaped groove are in a semicircular shape consistent with the radian of the cylindrical rod.
CN202010262611.9A 2020-04-07 2020-04-07 Full-lining ceramic three-way ball valve and valve ball structure thereof Pending CN111365491A (en)

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CN202010262611.9A CN111365491A (en) 2020-04-07 2020-04-07 Full-lining ceramic three-way ball valve and valve ball structure thereof

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Application Number Priority Date Filing Date Title
CN202010262611.9A CN111365491A (en) 2020-04-07 2020-04-07 Full-lining ceramic three-way ball valve and valve ball structure thereof

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932432A (en) * 1988-02-05 1990-06-12 Metalpraecis Berchem + Schaberg Gesellschaft Fur Metallformgebung Mit Beschrankter Haftung Shutoff and flow-control valve
US5127628A (en) * 1991-11-04 1992-07-07 Fike Corporation Means for rotating ball valves between open and closed positions
CN101545546A (en) * 2008-03-28 2009-09-30 辽宁华运控制设备制造有限公司 Tungsten-carbide cermet composite-material wear-resistant ball valve
CN201621319U (en) * 2009-10-12 2010-11-03 天津市圣恺工业技术发展有限公司 Enhanced ceramic sphere
CN206754457U (en) * 2017-05-16 2017-12-15 永嘉东峰阀门有限公司 A kind of floating ball valve
CN206860930U (en) * 2017-05-27 2018-01-09 浙江永联阀门有限公司 A kind of Fluorine-lined ball valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932432A (en) * 1988-02-05 1990-06-12 Metalpraecis Berchem + Schaberg Gesellschaft Fur Metallformgebung Mit Beschrankter Haftung Shutoff and flow-control valve
US5127628A (en) * 1991-11-04 1992-07-07 Fike Corporation Means for rotating ball valves between open and closed positions
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CN201621319U (en) * 2009-10-12 2010-11-03 天津市圣恺工业技术发展有限公司 Enhanced ceramic sphere
CN206754457U (en) * 2017-05-16 2017-12-15 永嘉东峰阀门有限公司 A kind of floating ball valve
CN206860930U (en) * 2017-05-27 2018-01-09 浙江永联阀门有限公司 A kind of Fluorine-lined ball valve

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