CN118998357A - High-temperature graphite-free hard sealing ball valve - Google Patents
High-temperature graphite-free hard sealing ball valve Download PDFInfo
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- CN118998357A CN118998357A CN202411127293.XA CN202411127293A CN118998357A CN 118998357 A CN118998357 A CN 118998357A CN 202411127293 A CN202411127293 A CN 202411127293A CN 118998357 A CN118998357 A CN 118998357A
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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
- 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
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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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
- 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
- F16K5/0663—Packings
- F16K5/0673—Composite packings
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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
- 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
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
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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
- 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
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
本发明涉及一种高温无石墨硬密封球阀，属于硬密封球阀技术领域，包括阀体、与阀体一体化设置的阀座、球体、与球体垂直连接的阀杆和密封组件，球体可转动设置在阀座上，密封组件设置在正对流体的球体一侧的阀体内，然后在正对流体的球体一侧的阀体内设置受热膨胀件，两个限位块均设置在球体与弹性件之间，且两个限位块对称分布，阀体、受热膨胀件、限位块和球体两两之间均相互贴合，受热膨胀件通过受热膨胀，使限位块、球体和阀体之间形成一个密闭整体，解决了在禁用石墨和碳的工况中，当在高温状态下，很难保证阀体与阀座之间的密封效果。
The present invention relates to a high-temperature graphite-free hard-sealed ball valve, belonging to the technical field of hard-sealed ball valves, comprising a valve body, a valve seat integrally arranged with the valve body, a sphere, a valve stem vertically connected to the sphere and a sealing component, wherein the sphere is rotatably arranged on the valve seat, the sealing component is arranged in the valve body on the side of the sphere facing the fluid, and then a heat expansion component is arranged in the valve body on the side of the sphere facing the fluid, two limit blocks are arranged between the sphere and the elastic component, and the two limit blocks are symmetrically distributed, the valve body, the heat expansion component, the limit blocks and the sphere are all fitted with each other, and the heat expansion component expands by heat to form a closed whole between the limit blocks, the sphere and the valve body, thereby solving the problem that it is difficult to ensure the sealing effect between the valve body and the valve seat under high temperature conditions in working conditions where graphite and carbon are prohibited.
Description
Technical Field
The invention belongs to the technical field of hard seal ball valves, and particularly relates to a high-temperature graphite-free hard seal ball valve.
Background
The main function of the high-temperature hard sealing ball valve is to provide a reliable and safe fluid control solution under the high-temperature working condition, and the high-temperature hard sealing ball valve is widely applied to industries such as petroleum, chemical industry, electric power, papermaking, pharmacy and the like, the main structure of the current high-temperature hard sealing ball valve generally comprises a valve body, a valve seat, a ball body, a valve rod and a graphite sealing ring, and the specific connection mode among the valve body, the valve seat, the ball body, the valve rod and the graphite sealing ring is as follows: the valve body is connected with the ball body through the valve seat, the valve seat is tightly pressed and attached through the graphite sealing ring, the valve seat is tightly pressed and attached with the ball body, the valve rod is connected with the ball body, and the valve rod is sealed with the valve body through the graphite sealing ring, when the valve rod is rotated during use, when the valve rod drives the ball body to rotate 90 degrees, the valve can be opened or closed, the function of cutting off or guiding flow is achieved, through the high-temperature graphite hard sealing ball valve, the sealing effect is good during use can be guaranteed, the design and the material of the high-temperature graphite hard sealing ball valve can be kept in the structural integrity under the high-temperature state, deformation or damage due to high temperature is avoided, and the valve is guaranteed to still work normally under emergency conditions.
However, the prior high-temperature hard sealing ball valve also has some problems in use: because the hard sealing ball valve adopts the graphite sealing ring during sealing, and the high-temperature hard sealing ball valve is widely applied to industries such as petroleum, chemical industry, electric power, papermaking, pharmacy and the like, when the hard sealing ball valve is used in the chemical industry, the electric power and the pharmacy, environments with special requirements on material conductivity, chemical reactivity, impurity adsorptivity and corrosion resistance can be met, and the working conditions of graphite and carbon are forbidden under the environments, so that the graphite sealing ring cannot be adopted at the moment, and when the sealing effect between a valve body and a valve seat is difficult to ensure in a high-temperature state, the high-temperature graphite-free hard sealing ball valve is provided.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the high-temperature graphite-free hard sealing ball valve, which solves the problem that in the working condition of forbidden graphite and carbon, the sealing effect between the valve body and the valve seat is difficult to ensure in a high-temperature state.
The aim of the invention can be achieved by the following technical scheme:
The high-temperature graphite-free hard sealing ball valve comprises a valve body, a valve seat, a ball body, a valve rod and a sealing assembly, wherein the valve seat is integrally arranged with the valve body; the sealing assembly comprises two limiting blocks and an elastic piece for thermal expansion, the thermal expansion piece is arranged in a valve body on one side of a sphere opposite to fluid, the two limiting blocks are arranged between the sphere and the elastic piece and are symmetrically distributed, the valve body, the thermal expansion piece, the limiting blocks and the sphere are mutually attached, and the thermal expansion piece enables the limiting blocks, the sphere and the valve body to form a closed whole through thermal expansion.
As a further scheme of the invention, a guide sleeve is arranged between the two limiting blocks, four surfaces of each limiting block are respectively attached to the outer wall of the guide sleeve, the inner wall of the valve seat, the heated expansion piece and the outer wall of the sphere, the attaching surface of each limiting block and the outer wall of the sphere is an arc-shaped surface, and the arc-shaped surface is matched with the arc shape of the sphere.
As a further scheme of the invention, the sealing parts of the valve body are all sealed by stainless steel tooth-shaped gaskets.
As a further aspect of the invention, the length of the valve stem is greater than four times the diameter of the sphere and less than six times the diameter of the sphere.
As a further aspect of the invention, the valve stem is connected to the valve body by a guide block which is used to ensure proper alignment of the valve stem with the ball.
As a further scheme of the invention, a sealing part is arranged between the valve rod far away from the ball body and the guide block, and the sealing part consists of an upper part, a middle part and a lower part.
As a further scheme of the invention, the valve rod is provided with a groove matched with the sealing part of the lower layer part, and the sealing part of the lower layer part is a high-temperature-resistant perfluoro ether material O-shaped ring.
As a further proposal of the invention, the middle layer part of the sealing part is Wen Fansai circles high in 250 ℃, and the Wen Fan stopper ring is made of stainless steel and PEEK.
As a further scheme of the invention, the upper layer part of the sealing part consists of two annular sealing rings, one annular sealing ring is positioned inside, the other annular sealing ring is positioned outside, and the two annular sealing rings are mutually matched for sealing.
The beneficial effects of the invention are as follows:
Through directly processing out the disk seat shape in the valve body, then adopt supersonic spraying or high temperature to spout the welding technology, spout the carbide and adhere to, then grind in the spheroid in the lump, form sealedly at last, do not have the clearance between disk seat and the valve body, make sealing effect between disk seat and the valve body reach best, then set up the thermal expansion spare in the valve body just facing sphere one side of fluid, two stopper all set up between spheroid and elastic component, and two stopper symmetric distributions, the valve body, thermal expansion spare, each other laminating between stopper and the spheroid, thermal expansion spare is through thermal expansion, make a airtight whole between stopper, spheroid and the valve body, under the condition of meeting and taking place conflagration or high temperature, thermal expansion spare thermal expansion will further extrude valve body and stopper, make the extrusion more tight between stopper and the spheroid, make firm airtight whole between stopper, the valve body, the disk seat, spheroid and the thermal expansion spare, in the operating mode of forbidden graphite and carbon, when under high temperature state, it is difficult to guarantee sealing effect between valve body and the disk seat.
Drawings
The present invention is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is a cross-sectional view of a prior art high temperature graphite hard seal ball valve;
FIG. 2 is a cross-sectional view of a high temperature graphite-free hard seal ball valve of the present invention;
FIG. 3 is a schematic view of a seal assembly according to the present invention;
FIG. 4 is a schematic view of a seal structure according to the present invention;
fig. 5 is a three-dimensional block diagram of the valve body of the present invention.
Description of main reference numerals:
In the figure: 1. a valve body; 2. a valve seat; 3. a sphere; 4. a valve stem; 5. a seal assembly; 51. a limiting block; 52. an elastic member; 6. a guide sleeve; 7. stainless steel tooth-shaped pads; 8. a guide block; 9. a sealing part; 91. an annular seal ring; 92. a Wen Fan plug ring is high; 93. an O-ring; 10. flexible graphite; 11. stainless steel is wound around the graphite gasket.
Detailed Description
In order to further describe the technical means and effects adopted by the invention for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the attached drawings and the preferred embodiment.
Referring to fig. 1-5, this embodiment provides a high temperature graphite-free hard seal ball valve, which comprises a valve body 1, a valve seat 2 integrally arranged with the valve body 1, a ball 3, a valve rod 4 vertically connected with the ball 3, and a seal assembly 5, wherein the ball 3 is rotatably arranged on the valve seat 2, the valve seat 2 is directly processed in the valve body 1, then the ball 3 is ground together by adopting a supersonic spraying or high temperature spray welding process, the spray hard alloy is adhered, and finally a seal is formed, so that no gap exists between the valve seat 2 and the valve body 1, the seal effect between the valve seat 2 and the valve body 1 can be best without adding a graphite seal ring, the seal assembly 5 is arranged in the valve body 1 on one side of the ball 3 facing the fluid, the seal assembly 5 is designed to open or close the valve when the valve rod 4 drives the ball 3 to rotate 90 degrees, therefore, the ball 3 needs to rotate, so that a gap between the ball 3 and the valve seat 2 cannot be left at a small point, but the gap between the ball 3 and the valve seat 2 needs to be avoided from influencing the sealing effect, and therefore, the sealing assembly 5 is designed, the sealing assembly 5 comprises two limiting blocks 51 and an elastic piece 52 for thermal expansion, the thermal expansion piece is arranged in the valve body 1 on one side of the ball 3 facing the fluid, the two limiting blocks 51 are arranged between the ball 3 and the elastic piece 52, the two limiting blocks 51 are symmetrically distributed, the valve body 1, the thermal expansion piece, the limiting blocks 51 and the ball 3 are mutually attached, the thermal expansion piece forms a closed whole among the limiting blocks 51, the ball 3 and the valve body 1 through thermal expansion, when the thermal expansion piece is installed, the thermal expansion piece is tightly attached to the limiting blocks 51 and the valve body 1 when the thermal expansion piece is not heated, in case of fire or high temperature, the heated expansion member is heated and expanded to further squeeze the valve body 1 and the limiting block 51, so that the limiting block 51 and the ball 3 are squeezed more tightly, and a firm airtight whole is formed among the limiting block 51, the valve body 1, the valve seat 2, the ball 3 and the heated expansion member, wherein the heated expansion member is arranged in the valve body 1 on the side of the ball 3 facing the fluid, as shown in fig. 2, the left side is the side of the ball 3 facing the fluid, the right side is the side of the ball 3 facing the fluid, and the heated expansion member is arranged in the valve body 1 on the side of the ball 3 facing the fluid, because the fluid leakage mainly occurs on the side of the ball 3 facing the fluid.
The main structure of the prior high-temperature hard seal ball valve generally comprises a valve body 1, a valve seat 2, a ball body 3, a valve rod 4, flexible graphite 10 and a stainless steel winding graphite gasket 11, and the specific connection modes among the valve body 1, the valve seat 2, the ball body 3, the valve rod 4, the flexible graphite 10 and the stainless steel winding graphite gasket 11 are as follows: the valve body 1 is connected with the ball body 3 through the valve seat 2, the valve seat 2 is pressed and jointed with the valve body 1 through flexible graphite 10, the valve seat 2 is pressed and jointed with the ball body 3, the valve rod 4 is connected with the ball body 3, and the valve rod 4 is sealed with the valve body 1 through flexible graphite 10 and stainless steel winding graphite gasket 11, when in use, the valve rod 4 is rotated, the valve rod 4 drives the ball body 3 to rotate 90 degrees, the valve can be opened or closed to play the role of cutting off or guiding flow, through the high-temperature graphite hard sealing ball valve, not only the good sealing effect in use can be ensured, but also the design and the material of the high-temperature graphite hard sealing ball valve can keep the structural integrity in high-temperature state, the valve can not deform or damage due to high temperature, the valve can still work normally under emergency condition is ensured, the description is shown in figure 1, fig. 1 is a sectional view of a prior art high temperature graphite-free hard sealing ball valve, and in addition, the valve body 1, the valve seat 2, the ball 3 and the valve rod 4 in this paragraph refer to the structure in fig. 1 only, for convenience of comparison with fig. 2, and the arrow in fig. 1 represents the flow direction, but the current high temperature hard sealing ball valve also has some problems in use, for example, since the hard sealing ball valve adopts a graphite sealing ring in sealing, whereas the high temperature hard sealing ball valve is widely used in industries of petroleum, chemical industry, electric power, paper making, pharmaceutical industry and the like, but in chemical industry, electric power and pharmaceutical industry, an environment having special requirements on material conductivity, chemical reactivity, impurity adsorptivity and corrosion resistance is encountered, and the environment is a condition where graphite and carbon are disabled, so that the graphite sealing ring cannot be adopted at this time, and in a high temperature state, it is difficult to ensure the sealing effect between the valve body 1 and the valve seat 2.
In order to solve the above problem, through directly processing the valve seat 2 shape in the valve body 1, then adopt supersonic spraying or high temperature to spout the welding process, spout the carbide and adhere to, then grind in the spheroid 3 altogether, finally form sealedly, make there is not the clearance between valve seat 2 and the valve body 1, make sealing effect between valve seat 2 and the valve body 1 reach best, then set up the thermal expansion piece in the valve body 1 just facing one side of the fluidic spheroid 3, two stopper 51 all set up between spheroid 3 and elastic component 52, and two stopper 51 symmetric distributions, each other laminating between valve body 1, the thermal expansion piece, stopper 51 and the spheroid 3, the thermal expansion piece is through thermal expansion, make a airtight whole between stopper 51, spheroid 3 and the valve body 1, under the condition that the conflagration is met or high temperature condition, thermal expansion piece will further extrude valve body 1 and stopper 51, make the extrusion more tight between stopper 51 and the spheroid 3, make stopper 51, valve body 1, valve seat 2, spheroid 3 and thermal expansion piece form firm airtight whole between, in the operating mode of graphite and carbon, when guaranteeing under high temperature, sealing effect between valve seat 2 is difficult to guarantee under high temperature condition.
It should be noted that, because the surface of spheroid 3 is the arc, two stopper 51 need guarantee promptly can compress tightly spheroid 3, need guarantee again can not harm spheroid 3, still need guarantee that spheroid 3 can open and close, this, in an embodiment, be equipped with uide bushing 6 between two stopper 51, four faces of stopper 51 respectively with uide bushing 6's outer wall, disk seat 2's inner wall, the laminating of thermal expansion spare and spheroid 3's outer wall, and the face that stopper 51 and spheroid 3's outer wall laminating is the arcwall face, arcwall face cooperatees with the arc of spheroid 3 sphere, here through having designed with spheroid 3 sphere matched with arcwall face, can make the arcwall face firmly hug tightly the sphere, thereby increased the laminating degree, and guaranteed the leakproofness, simultaneously, when spheroid 3 rotates, friction between spheroid 3 and the arcwall face can also be guaranteed not too big, the rotation of being convenient for.
Because the valve body 1 is designed to comprise a valve cover, the valve cover can improve the stability of the valve body 1, and the conventional valve body 1 and the valve cover are sealed by adopting a conventional stainless steel graphite winding gasket, as shown in fig. 1, but the high-temperature graphite-free hard sealing ball valve designed by the application also needs to adopt a sealing piece between the valve body 1 and the valve cover, but cannot adopt a stainless steel graphite winding gasket, in order to solve the problem, in one embodiment, the sealing part of the valve body 1 is sealed by adopting a stainless steel tooth gasket 7, the sealing part of the valve body 1 comprises the sealing part between the valve body 1 and the valve cover by adopting the stainless steel tooth gasket 7, and also comprises the sealing between the guide block 8 and the valve body 1 which are mentioned below, and the sealing gasket is beneficial to that firstly, the stainless steel has good corrosion resistance, and the stability can be kept even under a strong corrosive environment, so that the durability of the sealing effect is ensured.
Because it is the emergent condition such as conflagration that takes place, this emergent condition temperature is higher, it is more likely to lead to high temperature hard seal ball valve to appear the problem, in order to avoid high temperature hard seal ball valve to appear the problem at emergent condition such as conflagration, this, in an embodiment, valve rod 4's length is greater than the quadruple of spheroid 3 diameter and is less than six times of spheroid 3 diameter, this is to the restriction of valve rod 4's length is compared with prior art in fig. 1, when this valve rod 4 lengthens to the quadruple of spheroid 3 diameter length, can guarantee valve rod 4 position extension, the sealing portion 9 position is kept away from the valve high temperature source, its temperature is far lower than valve body 1 temperature, and can not exceed six times of spheroid 3 diameter, in order to facilitate the operation, the extravagant resource of overlength here, valve rod 4 position is prolonged, valve rod 4 sealing portion 9 position is kept away from valve body 1 high temperature position, it is kept at 200 ℃ below to need to guarantee valve rod 4 sealing member temperature, valve rod 4 extension still helps improving the sealing performance of valve, under high temperature operating condition, valve rod 4 is probably because of thermal expansion produces the deformation, valve rod 4 position extension can more than the compensation space can be kept at this moment, the high temperature is still can help reducing thermal conduction to reduce the heat conduction effect is compared with the valve rod 4 to reduce the risk relatively, and is reduced.
Besides the above, the lengthened valve rod 4 can reduce the corrosion speed of the valve rod 4 due to high-temperature oxidation, improve the service life of the valve rod 4, and prolong the service life of the whole valve, meanwhile, the valve rod 4 is lengthened to enable an operator to operate at a position far away from a high-temperature medium, so that the risk of injury to the operator caused by heat radiation and medium leakage is reduced, in addition, the valve rod 4 is connected with the valve body 1 through the guide block 8, the guide block 8 is used for ensuring the correct alignment of the valve rod 4 and the ball body 3, and the guide block 8 can facilitate the alignment between the valve rod 4 and the ball body 3.
In order to avoid the problem that the temperature is higher than that of the ball 3 and the sealing component 5 in a high-temperature state such as a fire disaster, the temperature is higher than that of the ball 3 and the sealing component 5, once the ball 3 and the sealing component 5 are in danger of cracking, the fluid leakage is caused, and the larger loss is caused, in this way, in one embodiment, a sealing part 9 is arranged between a valve rod 4 far away from the ball 3 and a guide block 8, the sealing part 9 consists of an upper part, a middle part and a lower part, a groove matched with the sealing part 9 is arranged on the valve rod 4, the sealing part 9 is a high-temperature-resistant perfluoro ether material O-shaped ring 93, the O-shaped ring 93 can bear a high-temperature environment up to 300 ℃, the sealing part is suitable for working under the high-temperature condition, the perfluoro ether material has excellent chemical stability, the middle part of the sealing part 9 is a high-temperature-resistant Wen Fan plug 92, and the high Wen Fan plug 92 is made of stainless steel and the PEEK.
The working principle and the using flow of the invention are as follows:
The valve seat 2 is directly processed in the valve body 1, then a supersonic spraying or high-temperature spraying welding process is adopted, hard alloy is sprayed and adhered to the valve body 1, then the valve body 3 is ground together to form sealing, so that a gap is not reserved between the valve seat 2 and the valve body 1, the sealing effect between the valve seat 2 and the valve body 1 is best, then a heated expansion piece is arranged in the valve body 1 on one side of the valve body 3 opposite to fluid, the two limiting pieces 51 are arranged between the valve body 3 and the elastic piece 52, the two limiting pieces 51 are symmetrically distributed, the valve body 1, the heated expansion piece, the limiting pieces 51 and the valve body 3 are mutually adhered, the heated expansion piece is heated and expanded to form a sealed whole among the limiting pieces 51, the valve body 1 and the limiting pieces 51 are further extruded under the condition of fire disaster or high temperature, so that the sealing effect between the limiting pieces 51, the valve body 1, the valve seat 2, the valve body 3 and the heated expansion piece are firmly sealed, and the problem that the sealing effect between the valve body 1 and the valve body 2 is very difficult to be guaranteed under the working conditions of disabling graphite and carbon is solved; in addition, if the ball 3 is damaged and leaks because of fire, the sealing part 9 between the valve rod 4 and the guide block 8 and the sealing part between the lengthened valve rod 4 and the valve body 1 are sealed by the stainless steel tooth-shaped pad 7, so that the sealing performance is good.
The present invention is not limited in any way by the above-described preferred embodiments, but is not limited to the above-described preferred embodiments, and any person skilled in the art will appreciate that the present invention can be embodied in the form of a program for carrying out the method of the present invention, while the above disclosure is directed to equivalent embodiments capable of being modified or altered in some ways, it is apparent that any modifications, equivalent variations and alterations made to the above embodiments according to the technical principles of the present invention fall within the scope of the present invention.
Claims (9)
1. The high-temperature graphite-free hard sealing ball valve is characterized by comprising a valve body, a valve seat, a ball body, a valve rod and a sealing assembly, wherein the valve seat is integrally arranged with the valve body; the sealing assembly comprises two limiting blocks and an elastic piece for thermal expansion, the thermal expansion piece is arranged in a valve body on one side of a sphere opposite to fluid, the two limiting blocks are arranged between the sphere and the elastic piece and are symmetrically distributed, the valve body, the thermal expansion piece, the limiting blocks and the sphere are mutually attached, and the thermal expansion piece enables the limiting blocks, the sphere and the valve body to form a closed whole through thermal expansion.
2. The high-temperature graphite-free hard sealing ball valve according to claim 1, wherein a guide sleeve is arranged between two limiting blocks, four surfaces of each limiting block are respectively attached to the outer wall of the guide sleeve, the inner wall of the valve seat, the heated expansion piece and the outer wall of the sphere, the attaching surface of each limiting block and the outer wall of the sphere is an arc-shaped surface, and the arc-shaped surface is matched with the arc shape of the sphere.
3. The high temperature graphite-free hard seal ball valve of claim 1, wherein the sealing portions of the valve body are all sealed by stainless steel tooth gaskets.
4. The high temperature graphite free hard seal ball valve of claim 1 wherein the length of the valve stem is greater than four times the diameter of the sphere and less than six times the diameter of the sphere.
5. The high temperature graphite free hard seal ball valve of claim 1 wherein the valve stem is connected to the valve body by a guide block which ensures proper alignment of the valve stem with the ball.
6. The high-temperature graphite-free hard sealing ball valve according to claim 5, wherein a sealing part is arranged between the valve rod far away from the ball body and the guide block, and the sealing part consists of an upper part, a middle part and a lower part.
7. The high temperature graphite free hard seal ball valve of claim 6, wherein the valve stem is provided with a groove which mates with a lower seal, the lower seal being a high temperature resistant O-ring of perfluoroether material.
8. The high temperature graphite free hard seal ball valve of claim 6 wherein the middle layer portion of the seal is Wen Fansai turns high in 250 ℃ and the high Wen Fan plug is made of stainless steel and PEEK.
9. The high temperature graphite free hard seal ball valve according to claim 6, wherein the upper portion of said seal portion is comprised of two ring-shaped seal rings, one ring-shaped seal ring being located inside and the other ring-shaped seal ring being located outside, said ring-shaped seal rings being cooperatively used for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411127293.XA CN118998357A (en) | 2024-08-16 | 2024-08-16 | High-temperature graphite-free hard sealing ball valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411127293.XA CN118998357A (en) | 2024-08-16 | 2024-08-16 | High-temperature graphite-free hard sealing ball valve |
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| CN118998357A true CN118998357A (en) | 2024-11-22 |
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| CN202411127293.XA Pending CN118998357A (en) | 2024-08-16 | 2024-08-16 | High-temperature graphite-free hard sealing ball valve |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203297659U (en) * | 2013-06-04 | 2013-11-20 | 方圆阀门集团有限公司 | Hard-sealing and high-temperature ball valve |
| CN203718008U (en) * | 2013-12-18 | 2014-07-16 | 雷蒙德（北京）阀门制造有限公司 | Floating type rigid sealing ball valve |
| CN204628625U (en) * | 2015-04-08 | 2015-09-09 | 东一阀门制造(南通)有限公司 | A kind of full-metallic hard seal ball valve |
| CN205896251U (en) * | 2016-08-16 | 2017-01-18 | 方正阀门集团有限公司 | High temperature ball valve that floats sealed firmly |
| CN106900480A (en) * | 2017-02-14 | 2017-06-30 | 杭州亦侬农业科技有限公司 | A kind of transplanting support meanss of gardens large-scale tree and its application |
| CN107756602A (en) * | 2017-10-18 | 2018-03-06 | 浙江搏正铜业有限公司 | A kind of production technology of high temperature leakage-free ball valve |
| CN211288826U (en) * | 2019-10-31 | 2020-08-18 | 昆山维萨阀门股份有限公司 | High-temperature metal hard seal floating ball valve |
| CN214743301U (en) * | 2021-04-19 | 2021-11-16 | 大庆隆锋机械设备制造有限公司 | Metal tooth-shaped pad with positioning loose ring |
| CN216201087U (en) * | 2021-11-16 | 2022-04-05 | 依蔼希(江苏)管道控制系统有限公司 | Low-loss regulating valve packing structure |
| CN217301683U (en) * | 2022-01-14 | 2022-08-26 | 远康阀门科技(浙江)有限公司 | High stability ball valve that floats sealed firmly |
| CN219209192U (en) * | 2022-09-26 | 2023-06-20 | 大连祥瑞阀门制造有限公司 | Anti-blocking ball valve |
-
2024
- 2024-08-16 CN CN202411127293.XA patent/CN118998357A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203297659U (en) * | 2013-06-04 | 2013-11-20 | 方圆阀门集团有限公司 | Hard-sealing and high-temperature ball valve |
| CN203718008U (en) * | 2013-12-18 | 2014-07-16 | 雷蒙德（北京）阀门制造有限公司 | Floating type rigid sealing ball valve |
| CN204628625U (en) * | 2015-04-08 | 2015-09-09 | 东一阀门制造(南通)有限公司 | A kind of full-metallic hard seal ball valve |
| CN205896251U (en) * | 2016-08-16 | 2017-01-18 | 方正阀门集团有限公司 | High temperature ball valve that floats sealed firmly |
| CN106900480A (en) * | 2017-02-14 | 2017-06-30 | 杭州亦侬农业科技有限公司 | A kind of transplanting support meanss of gardens large-scale tree and its application |
| CN107756602A (en) * | 2017-10-18 | 2018-03-06 | 浙江搏正铜业有限公司 | A kind of production technology of high temperature leakage-free ball valve |
| CN211288826U (en) * | 2019-10-31 | 2020-08-18 | 昆山维萨阀门股份有限公司 | High-temperature metal hard seal floating ball valve |
| CN214743301U (en) * | 2021-04-19 | 2021-11-16 | 大庆隆锋机械设备制造有限公司 | Metal tooth-shaped pad with positioning loose ring |
| CN216201087U (en) * | 2021-11-16 | 2022-04-05 | 依蔼希(江苏)管道控制系统有限公司 | Low-loss regulating valve packing structure |
| CN217301683U (en) * | 2022-01-14 | 2022-08-26 | 远康阀门科技(浙江)有限公司 | High stability ball valve that floats sealed firmly |
| CN219209192U (en) * | 2022-09-26 | 2023-06-20 | 大连祥瑞阀门制造有限公司 | Anti-blocking ball valve |
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