High-precision sealing self-cleaning ball valve

Abstract

The high-precision sealing self-cleaning ball valve comprises a valve body, a valve element and a cut-off chamber, the cut-off chamber is arranged on the valve body, the valve element is arranged in the cut-off chamber, the cut-off chamber is communicated with a first channel and a second channel, each of the first channel and the second channel comprises a narrow part and a wide part, the narrow parts are attached to the valve element, and at least four sealing pieces are arranged in the valve body in a surrounding mode. At least one elastic piece is arranged between the sealing pieces, the valve element is provided with a sealing part which is attached to the sealing pieces and the valve body, and a rotatable rotating rod with the axis parallel to the horizontal direction is arranged in the valve element. And the ball valve can stably operate for a long time in a high-viscosity medium or a medium containing particulate matters, keeps an excellent sealing effect and has a self-cleaning function.

Description

Technical Field

[0001] The invention relates to a high-precision sealed self-cleaning ball valve. Background Art

[0002] With the continuous development of industrial automation and precision control technology, ball valves, as an important component of fluid control systems, are widely used in petroleum, chemical, electric power, natural gas, metallurgy, food and other industries. Especially in situations requiring high-precision sealing and long-term stable operation, the performance requirements of ball valves are getting higher and higher. However, existing ball valves cannot maintain sealing and self-cleaning properties at the same time in harsh environments.

[0003] The current ball valve sealing design mainly relies on the contact between the sealing ring and the valve seat to ensure the sealing performance. However, during long-term use, especially when dealing with high-viscosity or particulate-containing media, impurities are easily accumulated between the valve core and the valve seat, resulting in damage to the sealing surface or poor sealing, and even fluid leakage. In addition, the sealing performance of traditional ball valves mostly relies on a single sealing ring structure, lacking sufficient flexibility and multiple sealing guarantees, resulting in the sealing performance of the ball valve being difficult to maintain stability for a long time in some special working environments; at the same time, since the sealing part is easily eroded by the medium, the surface of the seal will be worn due to dirt or corrosion, thereby reducing the sealing effect. Although many existing designs increase the sealing performance by increasing the number of sealing rings, they often fail to effectively solve the self-cleaning problem, resulting in the valve's sealing performance being reduced after long-term operation.

[0004] Therefore, those skilled in the art need a self-cleaning ball valve with high-precision sealing, which can maintain high sealing performance for a long time in a medium with high viscosity or containing particulate matter, and has a self-cleaning function. Summary of the invention

[0005] The purpose of the present invention is to solve the above deficiencies in the prior art and provide a self-cleaning ball valve with high-precision sealing, which can ensure that the ball valve can operate stably for a long time in a medium with high viscosity or containing particulate matter, and maintain an excellent sealing effect. At the same time, it has a self-cleaning function, which solves the problems of sealing failure and insufficient self-cleaning in the prior art. The following is a specific solution:

[0006] A high-precision sealed self-cleaning ball valve comprises a valve body, a valve core and a cut-off chamber, the valve body is provided with a cut-off chamber, the valve core is arranged in the cut-off chamber, the cut-off chamber is connected with a first channel and a second channel, the first channel comprises a narrow portion and a wide portion, the second channel comprises a narrow portion and a wide portion, the narrow portion is both fitted with the valve core, a sealing member and an elastic member are also provided in the valve body, at least four of the sealing members are provided, the sealing members are arranged around the valve body, at least one elastic member is provided between the sealing members, the valve core is provided with a sealing portion, the sealing portion is fitted with the sealing portion, and the sealing portion is also fitted with the valve body, a rotatable rotating rod is provided inside the valve core, and the axis of the rotating rod is parallel to the horizontal direction.

[0007] The wide part and the narrow part are used for the flow of fluid. When the fluid flows through the narrow part, since the diameter of the narrow part is smaller than that of the wide part, the fluid will accelerate the flow, making it more difficult for the medium to deposit. There are at least four seals on the contact surface of the valve body and the valve core, and elastic parts are arranged between the seals. The seals work together with the raised structure and the elastic parts that cooperate with the valve core to ensure the sealing between the valve core and the valve body under different working conditions and prevent fluid leakage caused by poor sealing.

[0008] Furthermore, the valve core includes a ball portion and a protrusion portion, the protrusion portion is circumferentially arranged on the ball portion, and the sealing portion is arranged on upper and lower sides of the protrusion portion.

[0009] Furthermore, the cross-section of the sealing portion has an annular protrusion, and at least three of the annular protrusions are provided. The center of the annular protrusion overlaps with the center of the spherical portion, and the diameter of the annular protrusion gradually decreases inward. The diameters of the annular protrusions are all the same to adapt to the scouring of different media and the erosion of particulate matter. The design of the annular protrusion makes the contact between the valve core and the seal closer, effectively preventing leakage of the medium, especially in harsh environments, and can provide multiple sealing guarantees to extend the service life.

[0010] Furthermore, four sealing members are provided, two of which are provided on the upper side of the valve core and two are provided on the lower side of the valve core, an elastic member is provided between the sealing members on the upper side and an elastic member is provided between the sealing members on the lower side.

[0011] Furthermore, a valve channel is provided inside the valve body, a bracket is provided on the valve channel, and a rotating rod is provided on the bracket.

[0012] Furthermore, the cut-off chamber is in the shape of a disc.

[0013] Furthermore, the valve body is fixed to the first passage via bolts, and the valve body is fixed to the second passage via bolts.

[0014] Furthermore, the diameter of the narrow portion is half of the wide portion, and there is a continuous transition between the narrow portion and the wide portion.

[0015] Furthermore, the material of the sealing element is a combination of one or more of fluororubber, polytetrafluoroethylene and chloroprene rubber.

[0016] Furthermore, the elastic member is made of stainless steel.

[0017] Beneficial effects: The present invention effectively solves the problems of insufficient sealing of existing ball valves in harsh environments and easy accumulation of impurities in the sealing parts, so that the valve can operate stably in high-viscosity, particulate-rich or highly corrosive media; when the fluid passes through the valve, in addition to driving the rotary rod to rotate, the movement of the rotary rod also directly contacts and cleans impurities on the contact surface between the valve core and the valve body, reducing sealing failure caused by accumulation of particulate matter and impurities, and extending the service life of the valve;

[0018] Multiple seals and elastic parts are used to ensure the sealing effect. The sealing part of the valve core and the seal work well together to ensure the sealing performance under different working conditions. In addition, the elastic parts arranged between the seals can play a compensatory role when the fluid pressure changes, ensuring that the sealing surface always maintains close contact. Even in media with high viscosity or more particles, the structural design and elastic effect of the seal can effectively prevent fluid leakage and improve the long-term stability of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a self-cleaning ball valve with high-precision sealing from the front view;

[0020] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional view along AA;

[0021] Figure 3 It is a schematic diagram of a self-cleaning ball valve with high-precision sealing from a top view;

[0022] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional view along BB;

[0023] Figure 5 It is a side view schematic diagram of a self-cleaning ball valve with high-precision sealing;

[0024] Figure 6 It is a schematic diagram of a valve core of a high-precision sealed self-cleaning ball valve from a top view;

[0025] In the figure: 1, valve body, 2, stop chamber, 3, valve core, 4, first channel, 5, second channel, 6, elastic member, 7, wide portion, 8, narrow portion, 9, sealing member, 10, valve stem, 11, ball portion, 12, protrusion, 13, sealing portion, 14, bolt, 15, rotary rod, 16, bracket, 17, valve channel, 18, annular protrusion. DETAILED DESCRIPTION

[0026] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0027] Please see Figure 1-6 A high-precision sealed self-cleaning ball valve comprises a valve body 1, a valve core 3 and a cut-off chamber 2. The valve body 1 is provided with a cut-off chamber 2, the valve core 3 is arranged in the cut-off chamber 2, the cut-off chamber 2 is communicated with a first channel 4 and a second channel 5, the first channel 4 comprises a narrow portion 8 and a wide portion 7, the second channel 5 comprises a narrow portion 8 and a wide portion 7, the narrow portion 8 is both fitted with the valve core 3, a sealing member 9 and an elastic member 6 are also arranged in the valve body 1, at least four sealing members 9 are provided, the sealing members 9 are arranged around the valve body 1, at least one elastic member 6 is arranged between the sealing members 9, a sealing member 13 is provided in the valve core 3, the sealing member 13 is fitted with the sealing member 9, and the sealing member 13 is also fitted with the valve body 1, a rotatable rotary rod 15 is arranged inside the valve core 3, and the axis of the rotary rod 15 is parallel to the horizontal direction.

[0028] The valve core 3 includes a ball portion 11 and a protrusion 12, the protrusion 12 is circumferentially arranged on the ball portion 11, and the sealing portion 13 is arranged on the upper and lower sides of the protrusion 12; the cross section of the sealing portion 13 has an annular protrusion, and at least three annular protrusions are arranged, the center of the annular protrusion overlaps with the center of the ball portion 11, the diameter of the annular protrusion gradually decreases inward, and the diameters of the annular protrusions are the same; there are four sealing members 9, two are arranged on the upper side of the valve core 3, and two are arranged on the lower side of the valve core 3, an elastic member 6 is arranged between the upper sealing members 9, and the lower sealing members 9 An elastic member 6 is provided between the valve body 1; a valve channel 17 is provided inside the valve body 1, a bracket 16 is provided on the valve channel 17, and a rotating rod 15 is provided on the bracket 16; the cut-off chamber 2 is disc-shaped; the valve body 1 and the first channel 4 are fixed by bolts 14, and the valve body 1 and the second channel 5 are fixed by bolts 14; the diameter of the narrow part 8 is half of the wide part 7, and there is a continuous transition between the narrow part 8 and the wide part 7; the material of the sealing member 9 is a combination of one or more of fluororubber, polytetrafluoroethylene and chloroprene rubber; the material of the elastic member 6 is stainless steel.

[0029] For the purpose of greater clarity, the invention is described in detail through the following embodiments.

[0030] In this embodiment, the valve body 1 is made of high-strength carbon steel material and has good high-pressure resistance and corrosion resistance; the inner cavity of the valve body 1 is provided with a cut-off chamber 2, which is connected to the first channel 4 and the second channel 5. In the channel, the diameter of the narrow part 8 is 20 mm, and the diameter of the wide part 7 is 40 mm, which can control the flow of the fluid through the valve core 3; at least four sealing members 9 are arranged in the inner cavity of the valve body 1, which are respectively located on the upper and lower sides of the valve body 1 to ensure the sealing effect between the valve core 3 and the valve body 1; the valve body 1 and the first channel 4 and the second channel 5 are fixed by bolts 14 to ensure the stability of the valve body 1 under high-pressure environment.

[0031] In this embodiment, the valve core 3 is made of stainless steel material, the valve core 3 is fixed to the valve stem 10, and the surface is treated with anti-corrosion paint; the structure of the valve core 3 includes a ball portion 11 and a protrusion 12, the protrusion 12 is circumferentially arranged on the ball portion 11 to form a sealing portion 13; the sealing portion 13 is located on the upper and lower sides of the protrusion 12, and the cross-section of the sealing portion 13 is designed as an annular protrusion, and the diameter of the annular protrusion gradually decreases inward to adapt to the scouring of different media and the erosion of particles; a rotating rod 15 is provided in the valve core 3, the axis of the rotating rod 15 is parallel to the horizontal direction, and the rotating rod 15 can rotate in the valve body 1, thereby realizing the self-cleaning function of the sealing surface; the scouring of the water flow is limited, After the rotary rod 15 is set, the inner surface of the valve channel 17 is not only flushed by the water flowing through the surface, but also by the water flow in the middle that pushes the rotary rod 15; specifically, the rotary rod 15 is relatively perpendicular to the flow direction of the fluid and rotates due to the push of the fluid. The rotation of the rotary rod 15 forms shear force and friction force in the valve channel 17, which directly contacts the inner surface of the valve to remove surface sediments. When the fluid passes through the valve, in addition to pushing the rotary rod 15 to rotate, the movement of the rotary rod 15 also directly contacts and cleans impurities on the contact surface between the valve core 3 and the valve body 1. This design significantly reduces the sealing failure caused by the accumulation of particulate matter and impurities, and extends the service life of the valve.

[0032] In this embodiment, the seal 9 is made of a composite material of fluororubber and polytetrafluoroethylene, which has good high temperature resistance, corrosion resistance and wear resistance, and is suitable for media with high viscosity and rich in particulate matter; the seal 9 is divided into two parts, an upper side and a lower side, wherein two seals 9 are provided on the upper side and two seals 9 are provided on the lower side; the elastic member 6 is made of stainless steel material, specifically a spring structure, which has strong elasticity and wear resistance, ensuring that the seal 9 always maintains good sealing performance during long-term use.

[0033] In this embodiment, the shape of the stop chamber 2 is designed to be a disc shape to ensure that the valve core 3 can rotate smoothly in the stop chamber 2; the connection method between the stop chamber 2 and the first channel 4 and the second channel 5 ensures the smooth flow of the fluid and avoids blockage or uneven flow of the fluid when passing through the valve. The first channel 4 and the second channel 5 can be arranged horizontally or in other directions, such as at a vertical angle between the first channel 4 and the second channel 5; during the rotation of the valve core 3, the sealing portion 13 and the sealing member 9 maintain a high degree of sealing under the action of the annular protrusion 18.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A high-precision sealed self-cleaning ball valve, characterized in that: The utility model comprises a valve body, a valve core and a cut-off chamber, wherein the valve body is provided with a cut-off chamber, the valve core is arranged in the cut-off chamber, the cut-off chamber is communicated with a first channel and a second channel, the first channel comprises a narrow portion and a wide portion, the second channel comprises a narrow portion and a wide portion, the narrow portion is both fitted with the valve core, a sealing member and an elastic member are also provided in the valve body, at least four sealing members are provided, the sealing members are arranged around the valve body, at least one elastic member is arranged between the sealing members, a sealing member is provided in the valve core, the sealing member is fitted with the sealing member, the sealing member is also fitted with the valve body, a rotatable rotating rod is provided inside the valve core, and the axis of the rotating rod is parallel to the horizontal direction.

2. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: The valve core comprises a ball portion and a protrusion portion, wherein the protrusion portion is circumferentially arranged on the ball portion, and the sealing portion is arranged on upper and lower sides of the protrusion portion.

3. A high-precision sealed self-cleaning ball valve according to claim 2, characterized in that: The cross section of the sealing portion has an annular protrusion, and at least three annular protrusions are provided. The center of the annular protrusion overlaps with the center of the spherical portion, and the diameter of the annular protrusion gradually decreases inwardly, and the diameters of the annular protrusions are all the same.

4. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: There are four sealing members, two of which are arranged on the upper side of the valve core and two on the lower side of the valve core. An elastic member is arranged between the sealing members on the upper side and an elastic member is arranged between the sealing members on the lower side.

5. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: A valve channel is arranged inside the valve body, a bracket is arranged on the valve channel, and a rotating rod is arranged on the bracket.

6. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: The cut-off chamber is in the shape of a disc.

7. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: The valve body is fixed to the first passage via bolts, and the valve body is fixed to the second passage via bolts.

8. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: The diameter of the narrow portion is half of the wide portion, and there is a continuous transition between the narrow portion and the wide portion.

9. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: The material of the sealing element is one or more combinations of fluororubber, polytetrafluoroethylene and chloroprene rubber.

10. A high-precision sealed self-cleaning ball valve according to claim 1, characterized in that: The elastic member is made of stainless steel.

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