Angle valve

Abstract

According to the angle valve, a valve element is arranged in a valve body, a hole is formed in the valve body, a valve deck is arranged on the valve body in a covering mode, a hole is formed in the valve deck, a valve rod penetrates through the valve deck in a sliding mode, one end of the valve rod is connected with the telescopic end of an external telescopic mechanism, and the other end of the valve rod is connected with the valve element; an inlet and an outlet are formed in the valve body, the valve seat is fixed to the valve body and provided with a fluid channel, the fluid channel is communicated with the outlet, and the valve element can block the fluid channel. The two ends of the flow guide ring are fixed to the valve body and the valve seat respectively, the fluid channel and the outlet communicate with the inner side of the flow guide ring, the valve element can be coaxially arranged on the inner side of the flow guide ring in a penetrating mode, and the rotation generatrix of the inner side wall of the flow guide ring is a water-drop-shaped curve. The inner side wall of the flow guide ring is designed, the rotation generatrix of the flow guide ring is a drop-shaped curve, the structure is simple in manufacturing process and low in cost, the problem of lateral erosive wear of the expansion section caused by eccentric jet flow of the angle valve can be effectively solved through the design, and the service life of the angle valve is prolonged.

Description

Technical Field

[0001] The invention relates to the field of valves, and more particularly to an angle valve. Background Art

[0002] Valves play an indispensable role in many key industries such as petroleum, chemical industry, electric power, long-distance pipelines, shipbuilding, nuclear energy, aerospace, and offshore oil extraction. They mainly undertake core functions such as controlling fluid flow, regulating pressure, preventing leakage, and realizing switch operation. Among them, angle valves have attracted much attention due to their unique structural advantages, including small flow resistance, low leakage, and strong durability. Especially when dealing with high pressure difference, high viscosity liquid and media containing solid particles or suspended matter, angle valves perform well. Its design effectively reduces the risk of coking and clogging, and is easy to clean and maintain. Therefore, it is widely used in the design of various stop valves, throttle valves, check valves, safety valves and pressure reducing valves, and occupies an important position.

[0003] However, in fields that require high-pressure operations, such as petroleum, coal chemical industry, aerospace, and nuclear energy, valves often need to face extreme working conditions. After a period of use, the sealing surface of the valve seat may wear due to long-term switching operations and medium flow, resulting in a decrease in sealing performance; if the medium is corrosive, the valve seat may be corroded, causing the material to become thinner or form corrosion pits; high-speed flowing media may cause erosion of the valve seat, especially in media containing solid particles. As the valve seat becomes more damaged, it is usually necessary to replace the entire valve assembly, which not only significantly increases maintenance and replacement costs, but also may bring potential safety hazards.

[0004] Therefore, how to provide an angle valve that can overcome the above problems is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, the present invention provides an angle valve.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An angle valve comprises a valve body, a valve core, a valve cover, a valve stem and a valve seat. A valve core is arranged inside the valve body, a hole is opened on the valve body and a valve cover is provided with a sealing cover, a hole is opened on the valve cover and a valve stem is slidably penetrated, one end of the valve stem is connected to the telescopic end of an external telescopic mechanism, and the other end of the valve stem is connected to the valve core, and the telescopic direction of the telescopic end of the external telescopic mechanism is the same as the rod length direction of the valve stem; the valve body is provided with an inlet and an outlet connected to the interior thereof, the valve seat is fixed on the valve body, a fluid channel penetrating through its end is provided on the valve seat, the fluid channel is connected to the outlet, and the valve core can block the fluid channel; it also comprises a guide ring, the two ends of the guide ring are respectively fixed to the valve body and the valve seat, the fluid channel and the outlet are both connected to the inner side of the guide ring, the inner side of the guide ring can be coaxially penetrated with a valve core, the rotation generatrix of the inner side wall of the guide ring is a water drop-shaped curve, and the equation of the rotation generatrix is:

[0008]

[0009] Wherein: t is the horizontal center angle of the water drop-shaped curve point (x, y); the small inner diameter end of the guide ring is arranged close to the valve seat.

[0010] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses an angle valve. The present invention designs the inner wall of the guide ring so that its rotating generatrix is ​​a teardrop-shaped curve. The manufacturing process of this structure is simple and the cost is low. In addition, the above design can effectively improve the problem of lateral erosion and wear of the expansion section caused by the eccentric jet of the angle valve, thereby increasing the service life of the angle valve.

[0011] Preferably, a limiting ring is coaxially formed integrally at one end of the guide ring away from the valve body, one end of the valve seat is tightly embedded inside the limiting ring, and one end of the fluid channel is located inside the limiting ring. The valve seat and the guide ring can be reliably connected and the sealing of the connection between the two is guaranteed.

[0012] Preferably, the valve core includes a tube body, a disc spring and a plug rod, one end of the valve stem is coaxially and tightly screwed in the tube body, the end of the valve stem located in the valve body is coaxially provided with a cylindrical groove, and the groove bottom wall of the cylindrical groove is coaxially integrally formed with a limit rod; the disc spring is coaxially arranged in the cylindrical groove, and the disc spring is sleeved on the limit rod; one end of the plug rod is located in the tube body, and the other end of the plug rod can be tightly inserted in the fluid channel, and one end of the plug rod located in the tube body is coaxially integrally formed with a cylinder; the end of the cylinder away from the plug rod can be located in the cylindrical groove, and the end wall of the cylinder can be tightly pressed against the disc spring; the tube body has a truncated cone inner wall one, and the cylinder has a truncated cone outer wall one, and the truncated cone outer wall one can be in close contact with the truncated cone inner wall one; the tube body has a truncated cone outer wall three, and the fluid channel has a truncated cone inner wall four, and the truncated cone outer wall three can be in close contact with the truncated cone inner wall four; the tube body is located on the inner side of the guide ring. The valve core can reliably seal the fluid channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0014] Figure 1 It is an axonometric cross-sectional view of an angle valve;

[0015] Figure 2 It is an axonometric view of the guide ring in an angle valve;

[0016] Figure 3 It is a cross-sectional view of a guide ring in an angle valve;

[0017] Figure 4 It is a flow field velocity distribution and local streamline diagram of an angle valve.

[0018] In the figure:

[0019] 1 is the valve body, 10 is the inlet, 11 is the outlet, 2 is the valve core, 20 is the tube body, 21 is the disc spring, 22 is the plug rod, 220 is the column, 3 is the valve cover, 4 is the valve stem, 40 is the cylindrical groove, 41 is the limit rod, 5 is the valve seat, 50 is the fluid channel, 6 is the guide ring, and 60 is the limit ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention discloses an angle valve. The present invention designs the inner wall of the guide ring 6 so that its rotation generatrix is ​​a water drop-shaped curve. The manufacturing process of the structure is simple and the cost is low. The design can effectively improve the problem of lateral erosion and wear of the expansion section caused by the eccentric jet of the angle valve, and can significantly improve the uniformity and stability of the flow field, effectively regulate the flow field, inhibit the formation of cavitation erosion, reduce the erosion and wear caused by the fluid deviation at the angle valve, and improve the reliability of the angle valve. At the same time, the design avoids complex processing technology, has a simple structure, low manufacturing cost, and is easy to implement in engineering. This optimized design has a significant protective effect on industrial fluid conveying systems and related equipment, can improve operating efficiency and extend the service life of equipment, thereby increasing the service life of the angle valve.

[0022] Example

[0023] See attached Figure 1-4The whole and part of the structure of an embodiment of the present invention is a schematic diagram, and the present invention specifically discloses an angle valve, including a valve body 1, a valve core 2, a valve cover 3, a valve stem 4 and a valve seat 5;

[0024] A valve core 2 is arranged inside the valve body 1, and the valve core 2 can move inside the valve body 1;

[0025] A valve cover 3 is provided on the valve body 1 and sealed thereon. A valve stem 4 is slidably penetrated through a hole in the valve cover 3. One end of the valve stem 4 is connected to the telescopic end of the external telescopic mechanism. The other end of the valve stem 4 is connected to the valve core 2. The telescopic direction of the telescopic end of the external telescopic mechanism is the same as the rod length direction of the valve stem 4. The external telescopic mechanism can drive the valve stem 4 to move back and forth, thereby realizing the reciprocating movement of the valve core 2 along the rod length direction of the valve stem 4.

[0026] The valve body 1 is provided with an inlet 10 and an outlet 11 which are connected to the inside of the valve body 1. The fluid enters the valve body 1 from the inlet 10, and the fluid in the valve body 1 is discharged from the outlet 11.

[0027] The valve seat 5 is fixed on the valve body 1. The valve seat 5 is provided with a fluid channel 50 that passes through the end thereof. The fluid channel 50 is straight and has a circular inner profile in the cross section. The length direction of the fluid channel 50 is the same as the length direction of the valve stem 4. The fluid channel 50 is connected to the outlet 11. The fluid in the valve body 1 can enter the fluid channel 50. The valve core 2 can block the fluid channel 50, thereby realizing the on-off of the liquid path of the angle valve.

[0028] A multi-stage expansion pipe is also provided at the lower end of the valve seat 5, and the expansion pipe is connected to the downstream equipment of the angle valve;

[0029] In addition to the above, the angle valve of the present application also includes a guide ring 6, which is a rotating body component. The two ends of the guide ring 6 are sealed and fixed to the valve body 1 and the valve seat 5 respectively. The axis of the guide ring 6 is parallel to the stem center line of the valve stem 4. One end of the fluid channel 50 and the outlet 11 of the valve body 1 are both connected to the inner side of the guide ring 6. The valve core 2 can be coaxially penetrated inside the guide ring 6. The rotation generatrix of the inner side wall of the guide ring 6 is a water drop-shaped curve. The equation of the rotation generatrix is:

[0030]

[0031] Where: t is the horizontal center angle of the water drop curve at point (x, y);

[0032] The small inner diameter end of the guide ring 6 is arranged close to the valve seat 5; according to the above equation, the point with zero curvature is obtained, and the curve segment between this point and the origin is taken as the revolving generatrix prototype of the inner wall of the guide ring 6. According to the required length of the guide ring 6, the revolving generatrix prototype is proportionally scaled and rotated to obtain the inner wall of the guide ring 6.

[0033] A limit ring 60 is coaxially and integrally formed at one end of the guide ring 6 away from the valve body 1, one end of the valve seat 5 is tightly embedded in the inner side of the limit ring 60, and one end of the fluid channel 50 is located on the inner side of the limit ring 60. This design ensures the reliability and sealing of the connection between the valve seat 5 and the guide ring 6.

[0034] The valve core 2 includes a tube body 20, a disc spring 21 and a plug rod 22. One end of the valve stem 4 is coaxially and tightly screwed in the tube body 20. One end of the valve stem 4 located in the valve body 1 is coaxially provided with a cylindrical groove 40. The groove bottom wall of the cylindrical groove 40 is coaxially integrally formed with a limit rod 41; the disc spring 21 is coaxially arranged in the cylindrical groove 40, and the disc spring 21 is sleeved on the limit rod 41; one end of the plug rod 22 is located in the tube body 20, and the other end of the plug rod 22 can be tightly inserted in the fluid channel 50. One end of the plug rod 22 located in the tube body 20 is coaxially integrally formed with a column 220 ; The end of the column 220 away from the insertion rod 22 can be located in the cylindrical groove 40, and the end wall of the column 220 can be tightly pressed against the disc spring 21; the tube body 20 has a truncated cone inner wall one, and the column 220 has a truncated cone outer wall one, and the truncated cone outer wall one can be in close contact with the truncated cone inner wall one; the tube body 20 has a truncated cone outer wall three, and the fluid channel 50 has a truncated cone inner wall four, and the truncated cone outer wall three can be in close contact with the truncated cone inner wall four; the tube body 20 is located on the inner side of the guide ring 6; the tube body 20 and the insertion rod 22 can reliably block the fluid channel 50.

[0035] When the fluid passes through the inner side of the guide ring 6, its turbulence is greatly reduced, thereby reducing the erosion and wear of the guide ring 6 and the valve seat 5; fluid separation usually occurs in the area where the wall pressure gradient changes from negative to positive. Due to the adverse pressure gradient, the boundary layer flow velocity will decrease or even flow back, thereby inducing vortices. This design suppresses the occurrence of fluid separation by precisely controlling the shape of the inner wall of the guide ring 6. The above structural optimization enhances the stability of the pipe wall boundary layer and helps to achieve a smooth transition of the flow field. This feature not only improves the fluid delivery efficiency, but also reduces the energy loss caused by turbulence. The flow direction of the fluid tends to be parallel when passing through the guide ring 6, indicating that the design can effectively reduce the influence of the radial velocity component. The formation of a parallel flow field helps to optimize the fluid dynamics of the downstream equipment of the angle valve and reduce the energy loss or equipment wear caused by fluid impact. Finally, the adverse effects of eccentric jets and cavitation on the flow field can be effectively reduced by improving the symmetry of the flow channel of the guide ring 6 and the uniformity of the velocity field.

[0036] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0037] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An angle valve, comprising a valve body (1), a valve core (2), a valve cover (3), a valve stem (4) and a valve seat (5), wherein the valve core (2) is arranged inside the valve body (1), a hole is opened on the valve body (1) and a valve cover (3) is provided for sealing, a hole is opened on the valve cover (3) and a valve stem (4) is slidably penetrated therethrough, one end of the valve stem (4) is connected to the telescopic end of an external telescopic mechanism, the other end of the valve stem (4) is connected to the valve core (2), the telescopic direction of the telescopic end of the external telescopic mechanism is the same as the rod length direction of the valve stem (4); the valve body (1) is provided with an inlet (10) and an outlet (11) which are communicated with the interior thereof, the valve seat (5) is fixed on the valve body (1), the valve seat (5) is provided with a fluid channel (50) which passes through its end, the fluid channel (50) is communicated with the outlet (11), and the valve core (2) can block the fluid channel (50); characterized in that The valve also comprises a guide ring (6), the two ends of which are respectively fixed to the valve body (1) and the valve seat (5), the fluid passage (50) and the outlet (11) are both connected to the inner side of the guide ring (6), the inner side of the guide ring (6) can be coaxially penetrated by a valve core (2), the inner side wall of the guide ring (6) has a rotation generatrix which is a water drop-shaped curve, and the equation of the rotation generatrix is: Wherein: t is the horizontal center angle of the water drop-shaped curve point (x, y); the small inner diameter end of the guide ring (6) is arranged close to the valve seat (5).

2. An angle valve according to claim 1, characterized in that: A limiting ring (60) is coaxially integrally formed at one end of the guide ring (6) away from the valve body (1), one end of the valve seat (5) is tightly embedded inside the limiting ring (60), and one end of the fluid channel (50) is located inside the limiting ring (60).

3. An angle valve according to claim 1, characterized in that: The valve core (2) comprises a tube body (20), a disc spring (21) and an insert rod (22); one end of the valve stem (4) is coaxially and tightly screwed into the tube body (20); one end of the valve stem (4) located in the valve body (1) is coaxially provided with a cylindrical groove (40); the groove bottom wall of the cylindrical groove (40) is coaxially integrally formed with a limit rod (41); the disc spring (21) is coaxially arranged in the cylindrical groove (40), and the disc spring (21) is sleeved on the limit rod (41); one end of the insert rod (22) is located in the tube body (20), and the other end of the insert rod (22) can be tightly inserted in the fluid channel (50), located in the tube body (20) One end of the insertion rod (22) is coaxially integrally formed with a column (220); the end of the column (220) away from the insertion rod (22) can be located in the cylindrical groove (40), and the end wall of the column (220) can be tightly pressed against the disc spring (21); the tube body (20) has a truncated cone-shaped inner wall one, and the column (220) has a truncated cone-shaped outer wall one, and the truncated cone-shaped outer wall one can be in close contact with the truncated cone-shaped inner wall one; the tube body (20) has a truncated cone-shaped outer wall three, and the fluid channel (50) has a truncated cone-shaped inner wall four, and the truncated cone-shaped outer wall three can be in close contact with the truncated cone-shaped inner wall four; the tube body (20) is located on the inner side of the guide ring (6).

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