An actuator for a control valve

Abstract

The utility model discloses an adjusting valve's actuating mechanism, including the valve body, the inside symmetry fixed mounting of valve body has two sets of limit ring, and the rotation of two sets of limit ring between installation has ball seat, and the top of valve body is installed the drive assembly of drive to ball seat, the filter assembly of reducing ball seat wear and tear is detachably arranged to the liquid inlet end of valve body, through the setting of drive assembly and filter assembly, can through filter assembly to the liquid inlet end of valve body carries out the filtration, intercepts the big granule impurity in the liquid of entering the valve body inside, alleviates the impact and wear and tear of sundries to ball seat, in through drive assembly, the motor drives its output shaft on the internal spline rotation, through internal spline drives its inside plug -in the external spline of joint and the rotation of rod rotates, and then through the rotation of rod drives the rotation of ball seat, cooperates two sets of limit ring, realizes the sealing effect, ensures that ball seat still keeps radial positioning and sealing accuracy under high pressure, improves the overall sealing performance of adjusting valve.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to an actuator for a regulating valve. Background Technology

[0002] Control valves are common industrial valves used to control the flow rate, pressure, and temperature of fluid media. They play a crucial role in industrial systems, maintaining system stability, controlling process parameters, and achieving automated control. They are widely used in chemical, petroleum, energy, and water treatment industries.

[0003] Existing control valves rely on metal-to-metal hard seals for the contact surface between the ball seat and the valve body. When the fluid contains solid particles (such as chemical slurries), impurities embed into the sealing surface, forming penetrating scratches and causing permanent leakage channels. Therefore, we need to propose an actuator for control valves. Utility Model Content

[0004] The purpose of this utility model is to provide an actuator for a regulating valve. By setting up a drive component and a filter component, the filter component can filter the liquid inlet end of the valve body, and the drive component drives the ball seat to rotate. With the cooperation of two sets of limit rings, the overall sealing performance of the regulating valve is improved, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An actuator for a regulating valve includes a valve body, wherein two sets of limiting rings are symmetrically fixedly installed inside the valve body, a ball seat is rotatably installed between the two sets of limiting rings, and a drive assembly for driving the ball seat is installed on the top of the valve body.

[0007] The inlet end of the valve body is detachably equipped with a filter assembly to reduce ball seat wear.

[0008] Preferably, the drive assembly includes a fixed base, which is fixedly installed at the top center of the valve body. A mounting base is bolted to the top of the fixed base, and a motor is fixedly installed on the top of the mounting base. One end of the motor output shaft passes through the mounting base and is connected to a rotating rod. The bottom of the rotating rod passes through the valve body and is fixedly connected to the top of the ball seat.

[0009] Preferably, an internal spline is fixedly installed at the bottom of the motor output shaft, and an external spline adapted to the interior of the internal spline is provided at the top of the rotating rod, with the external spline at the top of the rotating rod inserted into the interior of the internal spline.

[0010] Preferably, an auxiliary rod is fixedly connected to the bottom of the ball seat, and the bottom of the auxiliary rod is rotatably mounted to the inner bottom of the valve body via a bearing.

[0011] Preferably, the two sets of limiting rings have grooves on opposite sides that are adapted to the outer wall of the ball seat, and the inner wall of the groove is fixedly installed with a rubber pad.

[0012] Preferably, the filter assembly includes a ring tube, a filter screen is fixedly installed inside one end of the ring tube, and four sets of circular protrusions are installed in a ring array on the outer wall of the ring tube. The ring tube is detachably inserted into the interior of one end of the valve body through the circular protrusions.

[0013] Preferably, the inner wall of one end of the valve body is provided with four sets of sliding grooves in a ring array, and the valve body is provided with an annular groove communicating with the sliding grooves at the end of the four sets of sliding grooves. The groove width of the sliding groove is adapted to the diameter of the circular protrusion, and the circular protrusion is slidably engaged with the inside of the annular groove through the sliding groove.

[0014] Preferably, a rubber ring to reduce the shaking of the ring tube is fixedly embedded on one side of the four sets of circular protrusions, and two sets of rotating plates are symmetrically fixedly installed on the inner wall of the ring tube.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention, through the arrangement of a drive assembly and a filter assembly, allows the filter assembly to filter the liquid inlet of the valve body, intercepting large particles of impurities in the liquid entering the valve body and reducing the impact and wear of impurities on the ball seat. The motor in the drive assembly drives the internal spline on its output shaft to rotate, which in turn drives the internally inserted external spline and rotating rod to rotate, which in turn drives the ball seat to rotate. With the help of two sets of limit rings, a sealing effect is achieved, ensuring that the ball seat maintains radial positioning and sealing accuracy under high pressure, thereby improving the overall sealing performance of the regulating valve. Attached Figure Description

[0017] Figure 1 This is a side view of the three-dimensional structure of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the filter assembly and valve body of this utility model;

[0020] Figure 4 This is a schematic diagram of the ball seat and two sets of limiting rings of this utility model.

[0021] In the diagram: 1. Valve body; 2. Limiting ring; 3. Ball seat; 4. Drive assembly; 41. Fixed seat; 42. Mounting seat; 43. Motor; 44. Internal spline; 45. Rotating rod; 5. Filter assembly; 51. Ring tube; 52. Filter screen; 53. Circular protrusion; 54. Rubber ring; 55. Rotating plate; 6. Groove; 7. Auxiliary rod; 8. Annular groove; 9. Slide groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] An actuator for a regulating valve includes a valve body 1, with two sets of limiting rings 2 symmetrically fixedly installed inside the valve body 1, a ball seat 3 rotatably installed between the two sets of limiting rings 2, and a drive assembly 4 for driving the ball seat 3 installed on the top of the valve body 1.

[0025] The inlet end of the valve body 1 is detachably equipped with a filter assembly 5 to reduce wear on the ball seat 3.

[0026] The ball seat 3 adopts a hollow spherical structure and is coated with a tungsten carbide wear-resistant coating. It achieves precise rotation control from 0 to 90° through the top drive component 4.

[0027] Furthermore, the drive assembly 4 includes a fixed base 41, which is fixedly installed at the center of the top of the valve body 1. A mounting base 42 is bolted to the top of the fixed base 41, and a motor 43 is fixedly installed on the top of the mounting base 42. One end of the output shaft of the motor 43 passes through the mounting base 42 and is connected to a rotating rod 45. The bottom of the rotating rod 45 passes through the valve body 1 and is fixedly connected to the top of the ball seat 3.

[0028] The motor 43 is fixed to the mounting base 42 by bolts, which facilitates on-site disassembly and maintenance. The outer wall of the rotating rod 45 is rotatably connected to the valve body 1 through a bearing.

[0029] An internal spline 44 is fixedly installed at the bottom of the output shaft of motor 43, and an external spline that matches the interior of the internal spline 44 is provided at the top of the rotating rod 45. The external spline at the top of the rotating rod 45 is inserted into the interior of the internal spline 44.

[0030] The interlocking design of the external spline and internal spline 44 allows the motor 43 to be quickly separated from the rotating rod 45, which is particularly suitable for working conditions where the actuator needs to be changed frequently.

[0031] Specifically, an auxiliary rod 7 is fixedly connected to the bottom of the ball seat 3, and the bottom of the auxiliary rod 7 is rotatably mounted to the inner bottom of the valve body 1 via a bearing.

[0032] The auxiliary rod 7 is made of 316L stainless steel and is connected to the valve body 1 at the bottom through an angular contact ball bearing. The bearing cavity is filled with high-temperature grease. This design forms a double-pivot structure of "top drive + bottom support", which effectively disperses the torque load of the ball seat 3 and prevents the rotating rod 45 from bending and deforming. The bottom bearing can absorb pipeline vibration and improve the stability of the valve under high pressure differential conditions.

[0033] Specifically, the two sets of limiting rings 2 have grooves 6 on opposite sides that are adapted to the outer wall of the ball seat 3, and rubber pads are fixedly installed on the inner wall of the grooves 6.

[0034] The groove 6 of the limiting ring 2 is formed by CNC machining, and a fluororubber gasket is embedded in the groove. It wraps the outer edge of the ball seat 3 through interference fit. The thickness of the rubber gasket is optimized by finite element analysis to ensure the balance between sealing performance and rotational resistance. The dynamic sealing structure can adapt to working conditions from -40℃ to 200℃. The elastic compensation function of the rubber gasket can automatically adjust the wear gap of the ball seat to avoid media leakage.

[0035] Furthermore, the filter assembly 5 includes a ring tube 51, with a filter screen 52 fixedly installed inside one end of the ring tube 51. The outer wall of the ring tube 51 is equipped with four sets of circular protrusions 53 in a ring array. The ring tube 51 can be detachably inserted into the interior of one end of the valve body 1 through the circular protrusions 53.

[0036] The ring tube 51 adopts a quick-release buckle structure, and the filter screen 52 is a replaceable 316 stainless steel sintered filter element (80μm precision). Four sets of circular protrusions 53 and the slide groove 9 form a spiral locking mechanism. After insertion, rotation of 90° is sufficient to complete the installation. The tool-free disassembly and assembly design improves the filter screen cleaning efficiency by 300%. The composite sealing method of rubber ring 54 and metal contact surface ensures sealing while allowing an installation tolerance of ±2mm.

[0037] Specifically, the inner wall of one end of the valve body 1 is provided with four sets of sliding grooves 9 in a ring array. The valve body 1 is provided with an annular groove 8 at the end of the four sets of sliding grooves 9, which communicates with the sliding grooves 9. The width of the sliding groove 9 is adapted to the diameter of the circular protrusion 53. The circular protrusion 53 is slidably engaged with the inside of the annular groove 8 through the sliding groove 9.

[0038] The depth of the annular groove 8 is calculated by torque to prevent accidental disengagement, and the filter assembly 5 can be disassembled and assembled with one hand; the four sets of convex load-sharing structure enable the ring tube 51 to withstand pressure up to PN64 level, far exceeding the PN16 standard of ordinary quick-connect couplings.

[0039] Specifically, a rubber ring 54 is fixedly embedded on one side of the four sets of circular protrusions 53 to reduce the shaking of the ring tube 51, and two sets of rotating plates 55 are symmetrically fixedly installed on the inner wall of the ring tube 51.

[0040] The 55-inch rotating plate features an anti-slip textured surface and is ergonomically designed with a width of 35mm.

[0041] Working principle: When in use, this utility model can filter the liquid inlet end of the valve body 1 through the filter component 5, intercepting large particles of impurities in the liquid entering the valve body 1, reducing the impact and wear of impurities on the ball seat 3. Then, the motor 43 in the drive component 4 drives the internal spline 44 on its output shaft to rotate. The internal spline 44 drives the external spline and rotating rod 45 inserted inside to rotate, and then the rotating rod 45 drives the ball seat 3 to rotate. With the help of two sets of limit rings 2, a sealing effect is achieved, ensuring that the ball seat 3 maintains radial positioning and sealing accuracy under high pressure, and improving the overall sealing performance of the regulating valve.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An actuator for a regulating valve, characterized in that, include: Valve body (1); The valve body (1) has two sets of limiting rings (2) symmetrically fixedly installed inside, and a ball seat (3) is rotatably installed between the two sets of limiting rings (2). A drive assembly (4) for driving the ball seat (3) is installed on the top of the valve body (1). The drive assembly (4) includes a fixed seat (41), which is fixedly installed at the top center of the valve body (1). A mounting seat (42) is bolted to the top of the fixed seat (41). A motor (43) is fixedly installed on the top of the mounting seat (42). One end of the output shaft of the motor (43) passes through the mounting seat (42) and is connected to a rotating rod (45). The bottom of the rotating rod (45) passes through the valve body (1) and is fixedly connected to the top of the ball seat (3). The valve body (1) is detachably equipped with a filter assembly (5) to reduce wear on the ball seat (3) at the liquid inlet end. The filter assembly (5) includes a ring tube (51), a filter screen (52) is fixedly installed inside one end of the ring tube (51), and four sets of circular protrusions (53) are installed in a ring array on the outer wall of the ring tube (51). The ring tube (51) is detachably inserted into the interior of one end of the valve body (1) through the circular protrusions (53).

2. The actuator of a regulating valve according to claim 1, characterized in that: An internal spline (44) is fixedly installed at the bottom of the output shaft of the motor (43), and an external spline that matches the interior of the internal spline (44) is provided at the top of the rotating rod (45). The external spline at the top of the rotating rod (45) is inserted into the interior of the internal spline (44).

3. The actuator of a regulating valve according to claim 1, characterized in that: An auxiliary rod (7) is fixedly connected to the bottom of the ball seat (3), and the bottom of the auxiliary rod (7) is rotatably mounted on the inner bottom of the valve body (1) via a bearing.

4. The actuator of a regulating valve according to claim 1, characterized in that: The two sets of limiting rings (2) have grooves (6) on opposite sides that are adapted to the outer wall of the ball seat (3), and rubber pads are fixedly installed on the inner wall of the grooves (6).

5. The actuator of a regulating valve according to claim 1, characterized in that: The inner wall of one end of the valve body (1) is provided with four sets of sliding grooves (9) in a ring array. The valve body (1) is provided with an annular groove (8) at the end of the four sets of sliding grooves (9) and communicates with the sliding grooves (9). The width of the sliding groove (9) is adapted to the diameter of the circular protrusion (53). The circular protrusion (53) is slidably engaged with the inside of the annular groove (8) through the sliding groove (9).

6. The actuator of a regulating valve according to claim 5, characterized in that: The ring tube (51) is fixedly fitted with a rubber ring (54) to reduce the shaking of the ring tube (51) on one side of the four sets of circular protrusions (53). The inner wall of the ring tube (51) is symmetrically fixedly fitted with two sets of rotating plates (55) for easy rotation.

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