V-shaped ball valve with variable-profile V-shaped opening

Abstract

A V-shaped ball valve with a variable-profile V-shaped opening comprises a valve body, a valve seat, a valve element and a valve rod. The valve body is formed by hermetically butting a left valve body and a right valve body; the valve element is of a spherical structure and is arranged in the valve body, and a flow channel inlet in the valve element is a variable-contour V-shaped opening. The valve rod penetrates through the valve body, is fixedly connected with the valve element and is used for driving the valve element to rotate and adjusting whether an inlet of the valve rod and / or an outlet in the valve element is communicated with a flow channel of the valve body or not and adjusting the size of the communication section so as to achieve the opening, closing and flow adjusting functions of the valve. By optimizing the profile of the V-shaped opening and the runner structure on the inner wall of the valve element, the small-opening-degree adjusting precision is remarkably improved, flowing resistance, vortexes and dead zones are reduced, the anti-blocking and anti-scaling performance is enhanced, vibration noise is reduced, and the valve element has the advantages of being high in adjusting precision, low in flow resistance, stable in operation, wide in application range and the like; the device is suitable for high-precision adjustment and particle-containing medium working conditions such as chemical engineering, energy, metallurgy and water treatment.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, specifically relating to a V-type ball valve with a variable profile V-shaped orifice, which is particularly suitable for V-type ball valve structures with a variable profile V-shaped orifice and smooth transition of the internal flow channel of the valve core under conditions of high-precision adjustment, low flow resistance, and anti-clogging. Background Technology

[0002] V-type ball valves, with their excellent regulating performance and strong shearing capacity, are widely used in industrial fields such as chemical, energy, metallurgy, and water treatment. However, existing V-type ball valves still have many technical defects, making it difficult to balance regulating accuracy and flow performance, as follows: The design of the V-shaped port of the valve core is unreasonable: the V-shaped port of the existing V-type ball valves mostly adopts a straight structure with a single slope. When the opening is small, the non-linear distortion of the flow is obvious, and the accuracy of the small flow regulation is poor, which cannot meet the needs of high-end working conditions such as precise quantitative feeding and fluid ratio. When the opening is large, the flow area increases slowly, the flow resistance is large, and the energy consumption of fluid transportation is increased.

[0003] Unreasonable internal flow channels of valve core: The connection between the internal flow channels of valve core and the V-shaped port is often a sharp angle or a non-smooth transition. When the fluid flows through this area, it is easy to generate eddies, dead zones and local backflow. This not only increases pressure loss, but also easily leads to particle deposition and scaling in the medium, affecting the valve's regulating performance and service life. The jamming problem is more prominent, especially in the case of media containing particles and high viscosity.

[0004] Poor flow channel smoothness: There is no smooth transition structure between the inner wall of the valve core and the valve core outlet of the traditional V-type ball valve. The fluid impact and flow separation are obvious, the operation vibration is large, and the flow loss and particle deposition are further aggravated.

[0005] Patent application CN207178754U discloses a flow regulating V-type ball valve. In this patented technology, the ball valve core has a media flow channel with a single V-shaped orifice. Flow regulation is achieved through the V-shaped orifice, and the valve stem drives the ball to rotate, completing opening and closing and flow control. However, this prior art has significant drawbacks: First, the V-shaped orifice uses a single slope and single curvature structure without segmented contour design. When adjusting at small openings, the flow area changes too much, making it impossible to achieve precise linear control of small flow rates within a small opening range, resulting in insufficient regulation accuracy. Second, the media flow channel inside the ball has an irregular structure, and there is no smooth transition between the inner wall of the channel and the V-shaped orifice. When the media flows through, it strongly impacts the inner wall, easily forming large-area eddies and dead zones, significantly reducing fluid flow efficiency and exacerbating media deposition and valve wear. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention aims to provide a V-type ball valve with a variable profile V-shaped orifice. By optimizing the conventional V-shaped cut of the traditional valve core with a single slope and single profile into a variable profile V-shaped orifice, and combining it with a smooth transition internal flow channel formed by a continuously smooth curved surface throughout the entire range, differentiated flow regulation effects are achieved in different opening ranges. At the same time, it eliminates abrupt structural changes such as sharp corners and steps in the flow channel, reduces eddies and dead zones, and lowers flow resistance and the risk of media deposition. Through the synergistic design of the segmented variable profile V-shaped orifice and the smooth internal flow channel throughout the entire range, the problems of low regulation accuracy, high flow resistance, easy clogging, and high vibration and noise of traditional valves are solved from the root.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A V-shaped ball valve with a variable profile V-shaped orifice includes a valve body 1, a valve seat 2, a valve core 3, and a valve stem 4. The valve body 1 is formed by sealing and connecting a left valve body and a right valve body. The valve core 3 has a spherical structure and is disposed inside the valve body 1. The flow inlet on the valve core 3 is a variable profile V-shaped orifice 5. The valve stem 4 passes through the valve body 1 and is fixedly connected to the valve core 3. It is used to drive the valve core 3 to rotate, adjust whether its inlet and / or its internal outlet 7 are connected to the flow channel of the valve body 1, and adjust the size of the connection cross section, so as to realize the valve's opening and closing and flow regulation functions.

[0008] The contour shape of the variable contour V-shaped opening 5 is as follows: A closed profile consisting of two curved sections symmetrically connected along a direction perpendicular to the flow channel; Each of the aforementioned curve segments is formed by two contours with different slopes, a small opening segment 51 and a large opening segment 52, which are smoothly connected by an arc. Among them, the small opening segment 51 of the two curved sections forms a V-shape at the connection.

[0009] The large opening section 52 of the two curved sections forms an arc shape at the connection, and the arc apex direction is away from the flow channel.

[0010] The small opening segment 51 corresponds to a rotation angle of 9°~24° and adopts a small slope profile with a slope of 1:3~1:4; the large opening segment 52 corresponds to a rotation angle of 24°~78° and adopts a large slope profile with a slope of 1:2~1:3; the small opening segment 51 and the large opening segment 52 are smoothly transitioned by a curve, and the rotation angle is the rotation angle of the valve core 3 compared to the initial angle, the initial angle is 0-9 degrees, which is the valve closed state.

[0011] The outline shape of the valve core internal outlet 7 is as follows: A closed profile consisting of two curved sections symmetrically connected along a direction perpendicular to the flow channel; The upper part of the two curved sections connects to form an arc, with the apex of the arc pointing away from the flow channel, while the lower part connects to a near-horizontal position.

[0012] The contour curves of the variable profile V-shaped port 5 are not on the same plane; the contour curves of the valve core internal outlet 7 are not on the same plane.

[0013] The variable profile V-shaped notch 5 cutting edge is treated with a rounded corner 8, the radius of which is 0.8mm~1.0mm.

[0014] The inner wall of the valve core 3 transitions from the edge of the variable profile V-shaped opening 5 to the valve core internal outlet 7 with a continuous and smooth curved surface, forming a smooth transition valve core internal flow channel 6.

[0015] The smooth transition valve core internal flow channel 6 extends from the edge of the variable profile V-shaped opening 5 towards the valve core internal outlet 7, and adopts a continuous smooth curved surface transition throughout, forming a smooth transition valve core internal flow channel 6 without dead angles, steps, or sharp corners.

[0016] The surfaces of the variable profile V-shaped port 5, the smooth transition valve core internal flow channel 6, and the valve core internal outlet 7 are all polished, with a surface roughness Ra≤0.8μm.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention achieves multiple technological improvements by designing a variable profile V-shaped port 5 and combining it with a smooth, all-around structure of the internal flow channel 6 of the smooth transition valve core. Relying on the gentle contour of the small opening section 51 and the steep contour of the large opening section 52 of the variable profile V-shaped port 5, with the two sections smoothly connected by an arc, it effectively solves the drawback of flow distortion at small openings in traditional single-slope V-shaped ports. In the small opening section 51 of the strain-contrast V-shaped port, the flow area changes slowly when the rotation angle is adjusted, and the flow rate changes slowly. In the large opening section 52 of the strain-contrast V-shaped port, the flow area increases rapidly when the rotation angle is adjusted, and the flow rate changes rapidly. This achieves precise linear control of small flow rates while also meeting the needs of large flow rates, significantly optimizing flow linearity. The smooth, continuous curved surface transition design inside the valve core 3, from the variable profile V-shaped port 5 to the valve core internal outlet 7, forms a smooth transition internal flow channel 6. Combined with the same diameter straight-through flow channel structure of the valve body 1 and valve seat 2, it completely eliminates abrupt structural changes such as sharp corners and steps in the flow channel, significantly reducing medium flow eddies and dead zones, lowering overall flow resistance, and improving flow efficiency. Furthermore, the polished surface treatment of the flow channel and the rounded corner structure 8 of the variable profile V-shaped port 5 not only reduce the deposition and scaling of medium particles and enhance anti-clogging and anti-scaling performance, adapting to various complex working conditions, but also weaken the impact of the medium, reduce operating vibration and noise, and improve the stability and service life of the valve operation. In addition, the valve body 1 adopts a left and right split docking structure, which also facilitates the disassembly and maintenance of core components such as the valve core 3 and valve seat 2. The overall practicality and adaptability to working conditions are far superior to existing similar V-type ball valves. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the valve core 3 of the present invention.

[0020] Figure 3 This is a front view of the valve core 3 of the present invention.

[0021] Figure 4 This is a top view of the valve core 3 of the present invention.

[0022] Figure 5 This is a cross-sectional schematic diagram of the valve core 3 of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the variable contour V-shaped opening 5 of the present invention.

[0024] In the figure: 1—valve body, 2—valve seat, 3—valve core, 4—valve stem, 5—variable profile V-shaped port, 51—small opening section, 52—large opening section, 6—smooth transition valve core internal flow channel, 7—valve core internal outlet, 8—rounded corner. Detailed Implementation

[0025] The following describes specific embodiments and... Figures 1-6 The present invention will be further described in detail below. This embodiment is a preferred implementation and is only used to explain the present invention. It does not constitute a limitation on the scope of protection.

[0026] In this embodiment, the overall structure of the V-type ball valve is as follows: Figure 1 .

[0027] A V-shaped ball valve with a variable profile V-shaped orifice includes a valve body 1, a valve seat 2, a valve core 3, and a valve stem 4. The valve body 1 is divided into a left valve body and a right valve body, which are connected by bolts to form a whole for easy assembly and maintenance of internal components. The valve core 3 is a spherical structure made of 304 stainless steel and is located inside the valve body 1. The flow inlet on the valve core 3 is a variable profile V-shaped orifice 5. The valve stem 4 passes through the top of the valve body 1 and is fixedly connected to the valve core 3 by welding at its bottom end. By rotating the valve stem 4, the valve core 3 is rotated synchronously, adjusting whether its inlet and / or its internal outlet 7 is connected to the flow channel of the valve body 1 and the size of the connection cross section, so as to realize the valve's opening and closing and flow regulation functions.

[0028] Combination Figure 2 , Figure 3 and Figure 6As shown, a variable profile V-shaped opening 5 is provided on one side wall of the valve core 3 corresponding to the flow channel position. The contour shape of the variable profile V-shaped opening 5 is: a closed contour composed of two curved sections symmetrically connected in a direction perpendicular to the flow channel; each curved section is formed by two contours with different slopes, a small opening section 51 and a large opening section 52, smoothly connected by an arc; wherein, the small opening section 51 of the two curved sections forms a V-shape at the connection. The large opening section 52 of the two curved sections forms an arc shape at the connection, and the apex of the arc is away from the flow channel.

[0029] The valve is fully closed when the valve is at 0°~9°, and there is no medium flow.

[0030] The small opening section 51 corresponds to a rotation angle of 9°~24° and adopts a small slope profile with a slope of 1:3~1:4, so that the flow area changes smoothly when the valve core 3 rotates, achieving precise adjustment of small flow rate and excellent linearity, which fully meets the requirements of precision proportioning and micro-feeding conditions.

[0031] The large opening section 52 corresponds to a rotation angle of 24°~78° and adopts a large slope profile with a slope of 1:2~1:3, which enables the flow area to expand rapidly when the valve core 3 rotates, greatly improving the flow capacity of large flow and reducing the overall flow resistance of the valve.

[0032] The rotation angle is the rotation angle of the valve core 3 compared to the initial angle, where the initial angle is 0-9 degrees, representing the valve closed state.

[0033] The junction of the small opening segment 51 and the large opening segment 52 adopts a smooth curve transition to ensure that the contour is continuous without abrupt changes or sharp angles, thus completely avoiding local disturbances, eddies, and impacts of the medium.

[0034] The variable profile V-shaped cutting edge 5 is treated with a rounded corner 8, with the radius of the rounded corner 8 set at 0.8mm~1.0mm, preferably 1.0mm, to enhance the cutting edge's resistance to erosion and wear, weaken the impact noise of the medium, and at the same time retain the function of shearing fine particulate impurities to prevent valve jamming.

[0035] Combination Figure 5 A schematic diagram of the valve core section 3, and Figure 4The inner wall of valve core 3 extends from the edge of the variable contour V-shaped port 5 to the valve core outlet 7, using a continuous and smooth curved surface transition to form a smooth transition internal flow channel 6 without dead angles, steps, or sharp corners. This avoids sharp corners, steps, and structural abrupt changes in the flow channel, ensuring a smooth transition in the flow direction and uniform flow velocity distribution when the medium enters the valve core 3 from the variable contour V-shaped port 5, reducing eddies, dead zones, and local backflow. The smooth transition at the junction of the inner wall curved surface is smooth and natural, without abrupt turns, further ensuring the smoothness of medium flow. The internal flow channel of valve body 1 and valve seat 2 are straight-through channels of the same diameter. The outlet of valve seat 2 and the valve core 3 form a smooth transition at the docking position, without abrupt changes in cross-section, further reducing the impact of medium flow and achieving low-resistance smooth flow throughout the entire process, reducing the generation of eddies and dead zones.

[0036] The outline shape of the valve core internal outlet 7 is as follows: A closed profile consisting of two curved sections symmetrically connected along a direction perpendicular to the flow channel; The upper part of the two curved sections connects to form an arc, with the apex of the arc pointing away from the flow channel, while the lower part connects to a near-horizontal position.

[0037] The contour curves of the variable profile V-shaped port 5 are not on the same plane; the contour curves of the valve core internal outlet 7 are not on the same plane.

[0038] The surfaces of the variable profile V-shaped port 5, the smooth transition internal flow channel 6, and the internal outlet 7 of the valve core are all mechanically polished, with a surface roughness Ra≤0.8μm, preferably Ra=0.6μm. The smooth wall reduces flow friction resistance, reduces particle deposition and scaling, and improves anti-clogging and anti-scaling performance.

[0039] The working principle of this invention is as follows: When the valve opening is between 0° and 9°, it is in a fully closed and sealed state with no medium flow. When precise adjustment of a small flow rate is required, the valve stem 4 drives the valve core 3 to rotate to a small opening range of 9° to 24°. The smooth contour of the small opening section 51 of the variable profile V-shaped port 5 allows the flow area to change slowly and uniformly, achieving precise linear control of the micro-flow rate. The medium enters sequentially through the valve body 1 and valve seat 2, and after passing through the variable profile V-shaped port 5, it flows smoothly to the valve core outlet 7 under the smooth guidance of the smooth transition internal flow channel 6. The entire flow path is continuous with minimal disturbance and no obvious eddies or dead zones. The variable profile V-shaped port 5 and the smooth transition internal flow channel 6 work together to give the valve high adjustment linearity, low flow resistance, anti-clogging, and low vibration and noise characteristics throughout the full opening range.

[0040] When a large flow of medium is required, the valve stem 4 drives the valve core 3 to rotate to a large opening range of 24°~78°. The steep profile of the large opening section 52 of the variable profile V-shaped port 5 rapidly increases the flow area. After the medium enters through the valve seat 2 and the variable profile V-shaped port 5, it flows smoothly to the valve core outlet 7 through the smooth transition internal flow channel 6, which greatly reduces the overall pressure loss of the valve and improves the medium flow efficiency.

[0041] During the entire adjustment process of the valve, there are no obvious dead angles, abrupt changes in cross-section, or local impacts in the entire flow channel. This effectively avoids the deposition of media particles, scaling, and valve blockage. The valve operates smoothly with minimal vibration and noise, and its adjustment accuracy and operational reliability are significantly better than those of traditional V-type ball valves.

Claims

1. A V-type ball valve with a variable profile V-shaped orifice, characterized in that, The valve includes a valve body (1), a valve seat (2), a valve core (3), and a valve stem (4). The valve body (1) is formed by sealing and connecting a left valve body and a right valve body. The valve core (3) is a spherical structure and is located inside the valve body (1). The flow channel inlet on the valve core (3) is a variable profile V-shaped port (5). The valve stem (4) passes through the valve body (1) and is fixedly connected to the valve core (3). It is used to drive the valve core (3) to rotate and adjust whether its inlet and / or its valve core internal outlet (7) are connected to the flow channel of the valve body (1) and the size of the connection section, so as to realize the valve's opening and closing and flow regulation functions.

2. A V-type ball valve with a variable profile V-shaped opening according to claim 1, characterized in that, The contour shape of the variable contour V-shaped opening (5) is as follows: A closed profile consisting of two curved sections symmetrically connected along a direction perpendicular to the flow channel; Each of the aforementioned curve segments is formed by two contours with different slopes, a small opening segment (51) and a large opening segment (52), which are smoothly connected by an arc. Among them, the small opening segment (51) of the two curved sections forms a V-shape at the connection.

3. A V-shaped ball valve with a variable profile V-shaped opening according to claim 2, characterized in that, The large opening section (52) of the two curved sections forms an arc at the connection, and the arc apex is away from the flow channel.

4. A V-shaped ball valve with a variable profile V-shaped opening according to claim 2, characterized in that, The small opening segment (51) corresponds to a rotation angle of 9°~24° and adopts a small slope profile with a slope of 1:3~1:4; the large opening segment (52) corresponds to a rotation angle of 24°~78° and adopts a large slope profile with a slope of 1:2~1:3; the small opening segment (51) and the large opening segment (52) adopt a smooth curve transition, and the rotation angle is the rotation angle of the valve core (3) compared to the initial angle, and the initial angle is 0-9 degrees, which is the valve closed state.

5. A V-shaped ball valve with a variable profile V-shaped opening according to claim 3, characterized in that, The outline shape of the valve core internal outlet (7) is as follows: A closed profile consisting of two curved sections symmetrically connected along a direction perpendicular to the flow channel; The upper part of the two curved sections connects to form an arc, with the apex of the arc pointing away from the flow channel, while the lower part connects to a near-horizontal position.

6. A V-shaped ball valve with a variable profile V-shaped opening according to claim 1, 2, 3, 4, or 5, characterized in that, The contour curves of the variable contour V-shaped opening (5) are not on the same plane; the contour curves of the valve core internal outlet (7) are not on the same plane.

7. A V-shaped ball valve with a variable profile V-shaped opening according to claim 1, 2, 3, 4, or 5, characterized in that, The cutting edge of the variable profile V-shaped opening (5) is treated with a rounded corner (8), and the radius of the rounded corner (8) is 0.8mm~1.0mm.

8. A V-type ball valve with a variable profile V-shaped opening according to claim 1, characterized in that, The inner wall of the flow channel of the valve core (3) transitions from the edge of the variable profile V-shaped opening (5) to the inner outlet (7) of the valve core with a continuous smooth curved surface, forming a smooth transition inner flow channel (6) of the valve core.

9. A V-type ball valve with a variable profile V-shaped opening according to claim 8, characterized in that, The smooth transition valve core internal flow channel (6) extends from the edge of the variable profile V-shaped opening (5) to the valve core internal outlet (7), and adopts a continuous smooth curved surface transition throughout, forming a smooth transition valve core internal flow channel (6) without dead angles, steps, or sharp corners.

10. A V-type ball valve with a variable profile V-shaped opening according to claim 9, characterized in that, The surfaces of the variable profile V-shaped port (5), the smooth transition valve core internal flow channel (6), and the valve core internal outlet (7) are all polished, with a surface roughness Ra≤0.8μm.

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