High-strength shut-off valve with diversion and pressure reduction
By installing a flow divider and a flow-blocking guide plate inside the gate valve, uniform fluid distribution and kinetic energy cancellation are achieved, solving the problems of wear and uneven pressure reduction of traditional gate valves in high-pressure fluid environments, and improving the wear resistance of the valve and the stability and control accuracy of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG MAISKY VALVE IND CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional gate valves are prone to wear, leakage, and uneven pressure reduction in high-pressure fluid environments, making it difficult to meet the requirements of complex working conditions and high-precision control.
A high-strength shut-off valve with flow diversion and pressure reduction was designed. It adopts a flow diversion counteractor and flow obstruction guide plate structure to reduce fluid pressure through flow diversion and counteracting paths. Combined with the diamond and trapezoidal structure design, it achieves uniform distribution of fluid and kinetic energy cancellation.
It improves the wear resistance of valves and system stability, reduces fluid pressure fluctuations, and ensures the safety and precise control of fluid transportation.
Smart Images
Figure CN224283671U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of gate valve technology, and in particular relates to a high-strength gate valve that can divert and reduce pressure. Background Technology
[0002] In numerous industrial sectors, such as petrochemicals, power generation, and metallurgy, gate valves are widely used as critical fluid control components. Their primary function is to cut off or connect the medium in pipelines, playing a vital role in ensuring stable system operation. However, traditional gate valves reveal many problems that urgently need to be addressed when facing complex operating conditions.
[0003] On the one hand, when fluid enters a valve at high pressure and velocity, it exerts a strong impact force on the internal structure of the valve body. For example, in high-pressure oil pipelines, the fluid pressure can reach tens of megapascals. The high-speed flowing oil severely erodes the inner wall of the valve body and components such as the valve core. This not only easily causes wear and thinning of the valve body, reducing its service life, but may also lead to safety hazards such as leaks. Although some existing gate valves attempt to increase strength by increasing wall thickness, they cannot fundamentally solve the problem of fluid impact.
[0004] On the other hand, for systems requiring precise pressure control, the pressure-reducing function of traditional gate valves is often unsatisfactory. For example, in chemical production, certain reaction processes have extremely high requirements for fluid pressure stability; even slight pressure fluctuations can affect product quality. However, common gate valves are prone to large pressure fluctuations and uneven pressure reduction during pressure reduction, making it difficult to meet the high-precision requirements of production processes.
[0005] Therefore, it is essential to invent a high-strength shut-off valve that can divert and reduce pressure. Utility Model Content
[0006] To solve the above-mentioned technical problems, this utility model provides a high-strength shut-off valve with diversion and pressure reduction, including a valve body, a diversion counteractor, a discharge port, a valve cover assembly, a drive valve stem, a valve disc, and a handwheel. The valve body, the diversion counteractor, and the discharge port are integrally formed and interconnected. A valve cover assembly is installed on the valve body. The lower end of the drive valve stem installed on the valve cover assembly extends into the valve body and is connected to the valve disc disposed inside the valve body. The valve disc is disposed above the valve seat inside the valve body. A handwheel is fixedly installed on the upper end of the drive valve stem.
[0007] Preferably, the diverter includes a housing, an injection port, an outlet port, a diverter platform, and a flow-blocking guide plate. The injection port is integrally provided on the housing. The housing and the valve body are integrally provided together. The outlet port of the housing is connected to the valve body. A plurality of diverter platforms and flow-blocking guide plates are sequentially arranged inside the housing.
[0008] Preferably, the diversion crossbeams are arranged horizontally at equal intervals inside the housing, the diversion crossbeams are located in the middle of the housing, and the cross-section of the diversion crossbeams is a rhomboid structure.
[0009] Preferably, the flow-blocking guide plates are arranged laterally on the upper and lower inner walls of the housing, and the cross-section of the flow-blocking guide plates is trapezoidal.
[0010] Preferably, the flow-blocking guide plate is located between the flow-dividing crossbeams, and the two form a double flow-dividing countercurrent path inside the housing. The inclined surface of each flow-dividing crossbeam can guide the liquid to flow separately, while the flow-blocking guide plate can guide the liquid after diversion to countercurrent and merge. There is space between the two opposing flow-blocking guide plates that allows the liquid to flow towards the next flow-dividing crossbeam.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] This invention incorporates a flow divider within the valve body. Upon entering the valve body, the liquid is first divided into two or more flow paths within the flow divider. The diamond-shaped design of the flow divider effectively guides and distributes the liquid evenly into two different upper and lower flow channels. The trapezoidal structure of the flow-blocking guide plate and its ingenious arrangement with the flow divider create a double-flow-dividing counter-current path within the valve housing, guiding the divided liquids to counter-current and merge. During the counter-current process, the kinetic energy of the liquids cancels each other out, achieving a highly efficient pressure reduction effect. Compared to traditional shut-off valves, this design reduces fluid pressure, significantly improving system stability and safety.
[0013] The unique internal structural design of this flow counteractor allows the valve to adapt to various complex operating conditions. For fluids containing impurities, the structure of the flow divider and the flow-blocking guide plate can, to a certain extent, block and disperse the impurities, reducing their accumulation and blockage within the valve body and ensuring the normal operation of the valve. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0015] Figure 2 This is a half-sectional structural schematic diagram of the present invention.
[0016] Figure 3 This is a cross-sectional front view schematic diagram of the diversion and counter-current device of this utility model.
[0017] In the picture:
[0018] Valve body 1, diverter counter-flushing device 2, housing 21, injection port 22, discharge port 23, diverter crossbeam 24, flow-blocking guide plate 25, dual diverter counter-flushing path 26, discharge port 3, valve cover assembly 4, drive valve stem 5, valve disc 6 and handwheel 7. Detailed Implementation
[0019] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0020] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.
[0021] As attached Figure 1 To be continued Figure 3 As shown:
[0022] The present invention provides a high-strength shut-off valve with diversion and pressure reduction capabilities, comprising a valve body 1, a diversion counteractor 2, a discharge port 3, a valve cover assembly 4, a drive valve stem 5, a valve disc 6, and a handwheel 7. The valve body 1, the diversion counteractor 2, and the discharge port 3 are integrally formed and interconnected. The valve cover assembly 4 is mounted on the valve body 1. The lower end of the drive valve stem 5 mounted on the valve cover assembly 4 extends into the valve body 1 and is connected to the valve disc 6 disposed inside the valve body 1. The valve disc 6 is disposed above the valve seat inside the valve body 1. The handwheel 7 is fixedly mounted on the upper end of the drive valve stem 5.
[0023] Furthermore, the diverter 2 is integrally cast from high-strength alloy steel (such as chromium-molybdenum steel), possessing excellent pressure resistance and wear resistance. The diverter 2 includes a housing 21, an injection port 22, an outlet port 23, a diverting crossbeam 24, and a flow-blocking guide plate 25. The housing 21 is a cavity structure closed at both ends, with the injection port 22 integrally welded to its front outer wall. The inner diameter of the injection port 22 is adapted to the external pipe, reducing the scouring and wear of high-speed fluid. The rear end of the housing 21 is integrally cast with the valve body 1, and the connection between the two adopts a rounded transition structure to avoid stress concentration. The outlet port 23 at the rear end of the housing 21 is a circular through hole, the diameter of which is slightly smaller than the inner cavity width of the housing 21, and the edge of the outlet port 23 smoothly connects with the inner cavity flow channel of the valve body 1, ensuring that the fluid can flow unimpeded from the housing 21 into the valve body 1. Inside the housing 21, along the central axis, there are several diversion platforms 24 and flow-blocking guide plates 25 arranged at intervals. The components are integrated into a single structure through precision casting, without any seams.
[0024] Furthermore, the interior of the housing 21 is equipped with equally spaced diversion platforms 24 along the transverse central axis. The distance between two adjacent diversion platforms 24 is 1 / 3 of the width of the inner cavity of the housing 21. The diversion platforms 24 are vertically fixed in the middle of the housing 21, and their two ends are connected to the lower inner wall of the housing 21 by reinforcing ribs. A safety gap is reserved between the upper and lower parts and the upper inner wall of the housing 21 for liquid flow. The cross-section of the diversion platform 24 is a rhomboid structure, with the two obtuse angles pointing towards the injection port 22 and the discharge port 23, respectively. This structural design ensures that when the fluid impacts the diversion platform 24, it will be evenly diverted along the two inclined surfaces of the rhombus, effectively reducing the impact force of a single fluid stream. The surface of the diversion platform 24 is polished to a roughness Ra≤1.6μm, reducing fluid flow resistance.
[0025] Furthermore, flow-blocking guide plates 25 are arranged laterally on the upper and lower inner walls of the housing 21. The upper and lower rows of flow-blocking guide plates 25 are symmetrically distributed, and the horizontal distance between the opposing flow-blocking guide plates 25 is half the distance between the flow-diverting crossbeams 24. The flow-blocking guide plates 25 are forged from 45# steel, and their roots are fixed to the inner wall of the housing 21 by argon arc welding. The weld height is 5mm, and the welded parts are annealed to relieve stress. The cross-section of the flow-blocking guide plate 25 is an isosceles trapezoidal structure, with the upper base length being half the lower base length and the trapezoidal inclination angle being 45°. Its free end (the end away from the inner wall) is provided with a 1mm rounded corner transition. The height of the flow-blocking guide plate 25 is 1 / 4 of the inner cavity height of the housing 21, and the surface is coated with a 0.2mm thick nickel-based alloy coating to enhance wear resistance.
[0026] Furthermore, the flow-blocking guide plate 25 is precisely positioned in the gap between two adjacent flow-diverting platforms 24, forming a continuous double-flow-diverting counteracting path 26 inside the housing 21. The rhomboid slope of each flow-diverting platform 24 divides the incoming liquid into two branches, upper and lower. The upper branch is guided downward by the upper flow-blocking guide plate 25, while the lower branch is guided upward by the lower flow-blocking guide plate 25. The two branches counteract each other at the central axis between the two flow-diverting platforms 24, achieving pressure reduction through momentum cancellation. A flow space of 1 / 4 of the width of the housing 21 is reserved between the two opposing flow-blocking guide plates 25. The central axis of this space coincides with the central axis of the flow-diverting platform 24, ensuring that the counteracted fluid can flow along this space towards the next flow-diverting platform 24, forming a stepped pressure reduction effect.
[0027] The working principle is as follows: First, the fluid enters the housing 21 through the injection port 22 of the diverter 2. At this time, the fluid impacts the first diverting platform 24 inside the housing 21 with initial pressure and flow velocity. Since the cross-section of the diverting platform 24 is a rhomboid structure, and the two obtuse angles are directed towards the injection port 22 and the discharge port 23 respectively, the fluid is evenly divided into two branches, upper and lower, under the guidance of the rhomboid inclined surface, achieving initial diversion. The impact force of a single branch is significantly reduced due to diversion.
[0028] Next, the two streams come into contact with the flow-blocking guide plates 25 arranged on the upper and lower inner walls of the housing 21 during their flow. The flow-blocking guide plates 25 have an isosceles trapezoidal cross-section with an inclination angle of 45°. The upper stream is guided by the upper flow-blocking guide plate 25 to flow obliquely downward, while the lower stream is guided by the lower flow-blocking guide plate 25 to flow obliquely upward. The two streams counteract each other at the central axis between the two flow-diverting platforms 24. Through momentum cancellation, the kinetic energy of the fluid is converted into internal energy, and the pressure is effectively reduced, completing the first decompression process.
[0029] Then, the flushed fluid flows through the pre-reserved flow space (1 / 4 the width of the inner cavity of the housing 21) between the upper and lower opposing flow-blocking guide plates 25, and continues to flow towards the next diversion platform 24. Since multiple diversion platforms 24 are equidistantly arranged along the transverse central axis inside the housing 21, and the distance between adjacent diversion platforms 24 is 1 / 3 the width of the inner cavity of the housing 21, the fluid repeats the above-mentioned diversion, flushing, and pressure reduction process under the action of the subsequent diversion platforms 24 and the flow-blocking guide plates 25, forming a stepped pressure reduction effect, so that the fluid pressure gradually drops to the expected range.
[0030] Subsequently, the fluid, after undergoing multiple diversions and pressure reductions, flows into the valve body 1 through the discharge port 23 at the rear end of the housing 21. The edge of the discharge port 23 smoothly aligns with the inner cavity flow channel of the valve body 1, ensuring unobstructed entry of the fluid into the valve body 1. At this point, the fluid pressure and flow rate are stable.
[0031] Simultaneously, the operator can rotate the handwheel 7 to drive the valve stem 5 to rotate. Under the guidance of the valve cover assembly 4, the valve stem 5 moves up and down axially, thereby causing the valve disc 6 inside the valve body 1 to rise and fall. When the valve disc 6 moves upward and disengages from the valve seat inside the valve body 1, the fluid can flow through the gap between the valve seat and the valve disc 6 to the discharge port 3; when the valve disc 6 moves downward and presses against the valve seat, the fluid flow is cut off, achieving the shut-off function. By adjusting the lifting height of the valve disc 6, the fluid flow rate can be precisely controlled. Combined with the pressure reduction effect of the diverter 2, dual control of fluid pressure and flow rate can be achieved.
[0032] Finally, the fluid controlled by valve body 1 is discharged through discharge port 3, completing the entire process of fluid transportation, diversion pressure reduction, and shut-off control. Since valve body 1, diverter 2, and discharge port 3 are integrated, and the three are interconnected with a rounded transition structure at the connection point, eddy currents or pressure loss at the connection point are avoided, ensuring the efficient and stable operation of the entire system.
[0033] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.
Claims
1. A high-strength shut-off valve with diversion and pressure reduction capabilities, characterized in that: The device includes a valve body (1), a diverter (2), a discharge port (3), a valve cover assembly (4), a drive valve stem (5), a valve disc (6), and a handwheel (7). The valve body (1) is integrally formed with the diverter (2) and the discharge port (3), and the three are interconnected. The valve cover assembly (4) is installed on the valve body (1). The lower end of the drive valve stem (5) installed on the valve cover assembly (4) extends into the valve body (1) and is connected to the valve disc (6) provided inside the valve body (1). The valve disc (6) is located above the valve seat inside the valve body (1). The handwheel (7) is fixedly installed on the upper end of the drive valve stem (5).
2. The divertable, pressure-reducing, high-strength shut-off valve as described in claim 1, characterized in that: The diverter (2) includes a housing (21), an injection port (22), an outlet port (23), a diverter platform (24), and a flow-blocking guide plate (25). The injection port (22) is integrally provided on the housing (21). The housing (21) is integrally provided with the valve body (1). The outlet port (23) provided on the housing (21) is connected to the valve body (1). Several diverter platforms (24) and flow-blocking guide plates (25) are sequentially provided inside the housing (21).
3. The divertable, pressure-reducing, high-strength shut-off valve as described in claim 2, characterized in that: The diversion platforms (24) are arranged horizontally at equal intervals inside the housing (21). The diversion platforms (24) are located in the middle of the housing (21), and the cross-section of the diversion platforms (24) is a rhomboid structure.
4. The divertable, pressure-reducing, high-strength shut-off valve as described in claim 3, characterized in that: The flow-blocking guide plate (25) is arranged horizontally on the upper and lower inner walls of the housing (21), and the cross section of the flow-blocking guide plate (25) is a trapezoidal structure.
5. The divertable, pressure-reducing, high-strength shut-off valve as described in claim 4, characterized in that: The flow-blocking guide plate (25) is located between the flow-dividing crossbeams (24), and the two form a double flow-dividing counterflow path (26) inside the housing (21). The inclined surface of each flow-dividing crossbeam (24) can guide the liquid to flow separately, while the flow-blocking guide plate (25) can guide the liquid after diversion to flow back and merge. There is space between the two opposing flow-blocking guide plates (25) that allows the liquid to flow towards the next flow-dividing crossbeam (24).