Electric shaft core three-way valve

Abstract

The utility model relates to an electric shaft core three-way valve which comprises a valve seat, a valve cover, a valve core and an electric actuator, the valve cover is connected to the center of the top of the valve seat in a threaded mode, a vacancy-free valve cavity is formed between the valve seat and the valve cover, and the valve core is installed in the vacancy-free valve cavity in a rotating mode. A valve rod is fixedly connected to the center of the top end of the valve element. The top of the valve rod penetrates through a round hole in the center of the valve deck from bottom to top and then is connected with an electric actuator. A medium inlet is formed in the bottom of the valve seat, two medium outlets are formed in the side wall of the valve seat, a lower open hole is formed in the middle of the valve element, three side open holes are formed in the side face of the valve element, the lower open hole and the medium inlet are kept in a normally-open state, and when the valve element rotates, one side open hole is communicated with one medium outlet. The valve has the advantages that the valve cover is in threaded connection with the valve seat, the valve element is directly installed in the unoccupied valve cavity from the valve cover, sealing is formed between the valve element and the inner wall of the unoccupied valve cavity, the structure is simple, and online disassembly, assembly and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to an electric shaft three-way valve. Background Technology

[0002] In existing three-way valve structures, two gate valves are typically installed on the three-way pipeline to control the direction of fluid flow. These two valve bodies are installed separately from the three-way connector, resulting in numerous connection points and a large space requirement. In recent years, three-way valves combining a three-way valve and a gate valve have been developed. However, existing three-way valves suffer from complex sealing structures, difficult disassembly and assembly, and inconvenient online maintenance. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned problems existing in the prior art and to provide an electric shaft three-way valve.

[0004] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0005] An electric three-way valve with a spool includes a valve seat, a valve cover, a cylindrical valve core, and an electric actuator. The valve cover is screwed to the top center of the valve seat, forming a cylindrical, non-empty valve cavity between the valve seat and the valve cover. The valve core is rotatably mounted in the non-empty valve cavity. A valve stem is fixed to the top center of the valve core, and the top of the valve stem passes through a circular hole in the center of the valve cover from bottom to top and connects to the electric actuator. The bottom of the valve seat has a downward-extending medium inlet, and the side wall of the valve seat has two symmetrical medium outlets. The middle of the valve core has a downward-opening lower opening, and the side of the valve core has three side openings arranged in a circular array and connected to the lower opening. The lower openings are normally open with respect to the medium inlet. When the valve core rotates, one of the side openings connects to one of the medium outlets.

[0006] The outer surface of the valve core is provided with a nickel-based alloy wear-resistant layer.

[0007] The included angle between the central axes of any two adjacent side openings is 120°.

[0008] Wherein, the width of the medium outlet is less than the distance between any two adjacent side openings.

[0009] Preferably, the inner wall of the non-empty valve cavity is provided with a flow channel wear-resistant sleeve.

[0010] Preferably, both the medium inlet and the medium outlet are provided with a connecting flange at the end away from the valve cavity without empty space.

[0011] Preferably, a sealing ring is installed between the valve cover and the valve stem.

[0012] The beneficial effects of this utility model are as follows: A valve cover is screwed onto the top of the valve body, forming a cylindrical, non-empty valve cavity between the valve seat and the valve cover. The valve core is rotatably installed in the non-empty valve cavity. The valve cover is screwed onto the valve seat, and the valve core directly exits from the valve cover into the non-empty valve cavity. A seal is formed between the valve core and the inner wall of the non-empty valve cavity. The structure is simple and convenient for online disassembly and maintenance. The valve seat is provided with one medium inlet and two medium outlets, and the valve core is provided with one lower opening and three side openings. The lower opening is kept open with respect to the medium inlet. The valve core is driven to rotate by an electric actuator, so that one of the side openings on the valve core is connected to one of the medium outlets on the valve seat, thereby controlling the direction of fluid flow. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0014] Figure 1 This is a front view structural schematic diagram of the electric shaft three-way valve in this utility model;

[0015] Figure 2 This is a bottom view of the structure of the electric shaft three-way valve in this utility model;

[0016] The following are the labels in the diagram: Valve seat 1, Medium inlet 11, Medium outlet 12, Flow channel wear sleeve 13, Connecting flange 14, Valve cover 2, Valve core 3, Bottom opening 31, Side opening 32, Valve stem 4, Electric actuator 5. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 and Figure 2 As shown, an electric shaft-driven three-way valve includes a valve seat 1, a valve cover 2, a cylindrical valve core 3, and an electric actuator 5. The valve cover 2 is screwed to the top center of the valve seat 1, forming a cylindrical, non-empty valve cavity between the valve seat 1 and the valve cover 2. The valve core 3 is rotatably installed in the non-empty valve cavity, filling it completely. Fluid cannot flow between the outer surface of the valve core and the inner wall of the non-empty valve cavity. The inner wall of the non-empty valve cavity is provided with a flow channel wear-resistant sleeve 13, which provides wear resistance and sealing protection for the inside of the valve seat. The outer surface of the valve core 3 is provided with a nickel-based alloy wear-resistant layer, which provides wear resistance to the outer surface of the valve core. The valve cover is screwed to the valve seat, and the valve core directly exits from the valve cover into the non-empty valve cavity, forming a seal between the valve core and the inner wall of the non-empty valve cavity. The structure is simple and convenient for online disassembly and maintenance.

[0019] The valve seat and valve cover are made of carbon steel, while the valve core and the wear-resistant sleeve of the flow channel are made of stainless steel.

[0020] A valve stem 4 is fixedly connected to the top center of the valve core 3. The top of the valve stem 4 passes through the round hole in the center of the valve cover 2 from bottom to top and is connected to the electric actuator 5.

[0021] The bottom of the valve seat 1 is provided with a downwardly extending medium inlet 11, and the side wall of the valve seat 1 is provided with two symmetrical medium outlets 12. Both the medium inlet 11 and the medium outlet 12 are provided with a connecting flange 14 at the end away from the valve cavity without clearance.

[0022] The valve core 3 has a downward-facing lower opening 31 in the middle, and three side openings 32 arranged in a circular array and connected to the lower opening 31 on the side of the valve core 3. The included angle between the central axes of any two adjacent side openings 32 is 120°, and the width of the medium outlet 12 is less than the distance between any two adjacent side openings 32.

[0023] The lower opening 31 is kept open with respect to the medium inlet 11. The valve core is driven to rotate by an electric actuator. When the valve core 3 rotates, one of the side openings 32 is connected to one of the medium outlets 12, thereby controlling the direction of fluid flow.

[0024] As a preferred embodiment, a sealing ring is installed between the valve cover 2 and the valve stem 4.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An electric shaft-driven three-way valve, characterized in that: The valve includes a valve seat, a valve cover, a cylindrical valve core, and an electric actuator. The valve cover is screwed to the top center of the valve seat, forming a cylindrical, non-empty valve cavity between the valve seat and the valve cover. The valve core is rotatably installed in the non-empty valve cavity. A valve stem is fixed to the top center of the valve core, and the top of the valve stem passes through a circular hole in the center of the valve cover from bottom to top and connects to the electric actuator. The bottom of the valve seat has a downward-extending medium inlet, and the side wall of the valve seat has two symmetrical medium outlets. The middle of the valve core has a downward-opening lower opening, and the side of the valve core has three side openings arranged in a circular array and connected to the lower opening. The lower opening and the medium inlet are kept in a normally open state. When the valve core rotates, one of the side openings connects to one of the medium outlets.

2. The electric shaft three-way valve according to claim 1, characterized in that: The outer surface of the valve core is provided with a nickel-based alloy wear-resistant layer.

3. The electric shaft three-way valve according to claim 1, characterized in that: The included angle between the central axes of any two adjacent side openings is 120°.

4. The electric shaft three-way valve according to claim 1, characterized in that: The width of the medium outlet is less than the distance between any two adjacent side openings.

5. The electric shaft three-way valve according to claim 1, characterized in that: The inner wall of the non-empty valve cavity is provided with a flow channel wear-resistant sleeve.

6. The electric shaft three-way valve according to claim 1, characterized in that: Both the medium inlet and the medium outlet are equipped with connecting flanges at the ends furthest from the non-empty valve cavity.

7. The electric shaft three-way valve according to claim 1, characterized in that: A sealing ring is installed between the valve cover and the valve stem.

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