Large Cv regulating valve with double-guide valve core

Abstract

The large Cv regulating valve comprises a valve body, a flow channel is formed in the valve body, an inlet and an outlet are formed in the two ends of the flow channel respectively, a valve seat is arranged in the middle of the flow channel, a valve deck is arranged on the valve body, a guide sleeve is arranged in the valve deck, the upper portion of a valve rod is arranged in the valve deck and the guide sleeve in a sliding mode, and the lower portion of the valve rod extends into the flow channel and is provided with the valve element. The upper part of the valve seat and the upper part of the valve core are respectively provided with a valve seat sealing inclined surface and a valve core sealing inclined surface which are matched; the middle part and the lower part of the valve core are valve core circulating parts, the peripheries of the valve core circulating parts are valve core guide surfaces, the valve core guide surfaces are matched with a valve seat middle hole in the middle part of the valve seat, and a plurality of circulating cavities which are uniformly distributed and are communicated are formed in the valve core circulating parts. According to the cylindrical valve element structure, windows are distributed at equal angles, and good guidance quality is achieved under the condition that large Cv is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a large Cv regulating valve with dual-guided valve core. Background Technology

[0002] In recent years, industrial control technology has been continuously upgraded, and as an important part of the control process, the regulating performance and stability of the regulating valve are particularly important.

[0003] Traditional valve core curves are machined as a whole by CNC machining, which requires high machining standards and takes a long time. Usually, only the guide structure is located at the valve stem. When large diameters are required and high pressure differential conditions are applied, the valve is subjected to great challenges. Once high-frequency vibration or large amplitude occurs, the valve stem is prone to deformation, the connection between the valve core and the valve stem may become loose or the valve stem may break. The regulating and sealing performance of the valve is severely reduced, affecting the service life of the valve. Summary of the Invention

[0004] The purpose of this invention is to provide a large Cv regulating valve with dual-guided valve core, which can solve the above-mentioned problems and improve the working stability of the regulating valve.

[0005] According to the technical solution provided by this utility model: a large Cv regulating valve with dual-guided valve core includes a valve body, a flow channel in the valve body, an inlet and an outlet at both ends of the flow channel, a valve seat in the middle of the flow channel, a valve cover on the valve body, a guide sleeve inside the valve cover, an upper part of a valve stem slidingly disposed in the valve cover and the guide sleeve, and a lower part of the valve stem extending into the flow channel and mounting a valve core; the upper part of the valve seat and the upper part of the valve core are respectively provided with a matching valve seat sealing slope and a valve core sealing slope; the middle and lower parts of the valve core are valve core flow parts, the outer periphery of the valve core flow parts is a valve core guide surface, the valve core guide surface is adapted to the valve seat central hole in the middle of the valve seat, and the valve core flow parts are provided with multiple evenly distributed and interconnected flow cavities.

[0006] As a further improvement of this utility model, a flow-diverting boss is provided at the center of the flow cavity.

[0007] As a further improvement of this utility model, the flow cavity divides the lower part of the valve core flow section into several valve core guide bosses.

[0008] As a further improvement of this utility model, reinforcing ribs are provided between the flow cavities.

[0009] As a further improvement of this utility model, the valve core flow section is provided with a uniformly distributed and interconnected flow cavity.

[0010] As a further improvement of this utility model, the diversion boss is an arc surface.

[0011] As a further improvement of this utility model, an avoidance hole is provided between the valve seat sealing inclined surface and the valve seat central hole.

[0012] As a further improvement to this utility model, the valve core and valve stem are integrally machined after welding.

[0013] The positive and progressive effects of this application are as follows:

[0014] 1) The cylindrical valve core structure of this utility model has windows distributed at equal angles, which ensures both large Cv and good guiding performance.

[0015] 2) The large Cv fluid window of the valve core of this utility model is composed of a combination of large and small irregularly shaped adjustment windows, which can achieve different flow characteristic requirements.

[0016] 3) The streamlined window and curved surface design of this utility model ensures smooth flow, high flow capacity, and reduces valve core erosion damage.

[0017] 4) The design of the support ribs in this utility model ensures the strength of the lower guide surface of the valve core and improves the reliability of the lower guide.

[0018] 5) The valve core of this utility model has a large Cv flow window that is precision cast and requires no additional processing. Only the outer circle of the valve core needs to be processed. Compared with the valve core of traditional regulating valve, it reduces the weight of the valve core, reduces the processing difficulty, and reduces the processing cost.

[0019] 6) The valve core and valve stem of this utility model are machined as a whole after welding, which ensures the coaxiality of the valve stem and valve core, matches the upper and lower guide structures, effectively improves the vibration resistance of the valve core, and enhances the working stability of the control valve. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a three-dimensional schematic diagram of the valve core structure.

[0022] Figure 3 for Figure 1 A magnified diagram of the number I in the diagram.

[0023] Figure 4 This is a structural diagram of the present invention in its working state.

[0024] Figures 1-4 The valve body includes 1, 2, 3, 4, 5, 6, and 7. Detailed Implementation

[0025] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 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.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, terms such as "comprising" and "having" mean that in addition to those already listed in "comprising" and "having," other unlisted contents may also be included; for example, a process, method, system, product, or device may include a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0028] Due to the angle of the drawing, some parts may not be drawn, but their positions and connections can be understood from the text descriptions.

[0029] like Figure 1 As shown, this utility model is a large Cv regulating valve with double-guided valve core, including a valve body 1, a flow channel in the valve body 1, an inlet 1-1 and an outlet 1-2 at both ends of the flow channel, a valve seat 3 in the middle of the flow channel, a valve cover 6 on the valve body 1, a guide sleeve 5 inside the valve cover 6, an upper part of a valve stem 4 slidingly in the valve cover 6 and the guide sleeve 5, and a lower part of the valve stem 4 extending into the flow channel and installing a valve core 2.

[0030] like Figures 2-3 As shown, the upper part of the valve seat 3 and the upper part of the valve core 2 are respectively provided with a matching valve seat sealing slope 3-1 and a valve core sealing slope 2-1. The middle and lower parts of the valve core 2 are the valve core flow part, and the outer periphery of the valve core flow part is the valve core guide surface 2-2. The valve core guide surface 2-2 is adapted to the valve seat central hole 3-2 in the middle of the valve seat 3, and the two realize the guidance of the valve core 2 to move vertically in the valve seat 3.

[0031] The valve core flow section has multiple evenly distributed and interconnected flow chambers 2-3 for media flow. A flow-dividing boss 2-4 is located at the center of each flow chamber to evenly distribute the media flowing in from inlet 1-1 into the flow chambers 2-3. The flow chambers 2-3 divide the lower part of the valve core flow section into several valve core guide bosses 2-6, maintaining the stability of the movement of the valve core 2 and valve seat 3.

[0032] A reinforcing rib 2-5 is provided between the flow chambers 2-3, which helps to improve the strength of the valve core 2.

[0033] In this embodiment, the valve core flow section is provided with three evenly distributed and interconnected flow chambers 2-3, and the flow-dividing boss 2-4 is an arc surface, which has good flow-dividing uniformity.

[0034] An clearance hole 3-3 is provided between the valve seat sealing slope 3-1 and the valve seat central hole 3-2, so that even if the valve core 2 is worn or squeezed during long-term, high-frequency operation, the sealing performance between the valve seat 3 and the valve core 2 will not be affected.

[0035] The flow chamber 2-3 of valve core 2 can be equipped with a combination of large and small irregularly shaped windows to achieve the required flow characteristics, depending on the different flow characteristics required.

[0036] The flow chamber 2-3 and the diversion boss 2-4 of the valve core 2 are precision cast, requiring only the outer circle of the valve core 2 to be machined, thus reducing the weight of the valve core, reducing the machining difficulty, and reducing the machining cost.

[0037] The valve core 2 and valve stem 4 are welded together and then machined as a single unit. The valve stem 4 and valve core 2 are guided both vertically and horizontally.

[0038] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A valve core double-guiding large Cv regulating valve, comprising a valve body (1) provided with a flow passage, the flow passage having an inlet (1-1) and an outlet (1-2) at two ends, characterized in that, The valve seat (3) is arranged in the middle of the flow channel, the valve cover (6) is arranged on the valve body (1), the guide sleeve (5) is arranged in the valve cover (6), the upper part of the valve rod (4) is arranged in the valve cover (6) and the guide sleeve (5) in a sliding mode, the lower part of the valve rod (4) extends into the flow channel and is provided with the valve core (2), the upper part of the valve seat (3) and the upper part of the valve core (2) are respectively provided with the matched valve seat sealing inclined surface (3-1) and the valve core sealing inclined surface (2-1), the middle part and the lower part of the valve core (2) are the valve core flow-through part, the outer periphery of the valve core flow-through part is the valve core guide surface (2-2), the valve core guide surface (2-2) is matched with the valve seat middle hole (3-2) in the middle part of the valve seat (3), a plurality of uniformly distributed and communicated flow-through cavities (2-3) are arranged in the valve core flow-through part.

2. The double-guided large Cv regulating valve with a valve trim according to claim 1, characterized in that, The flow-through cavity is provided with the flow distribution boss (2-4) in the center.

3. The double-guided large Cv regulating valve with a valve trim according to claim 1, characterized in that, The flow-through cavity (2-3) separates the lower part of the valve core flow-through part into a plurality of valve core guide bosses (2-6).

4. The double-guided large Cv regulating valve with a valve trim according to claim 1, characterized in that, The flow-through cavities (2-3) are provided with the reinforcing ribs (2-5) therebetween.

5. The double-guided large Cv regulating valve with a valve trim according to claim 1, characterized in that, The valve core flow-through part is provided with three uniformly distributed and communicated flow-through cavities (2-3).

6. The double-guided large Cv regulating valve with a valve trim according to claim 2, characterized in that, The flow distribution boss (2-4) is a circular arc surface.

7. The double-guided large Cv regulating valve with a spool according to claim 1, characterized in that, The valve seat sealing inclined surface (3-1) and the valve seat middle hole (3-2) are provided with the avoiding hole (3-3) therebetween.

8. The double-guided large Cv regulating valve with a valve trim according to claim 1, characterized in that, The valve core (2) and the valve rod (4) are integrally processed after being welded.

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