Low-residue three-way reversing valve

Abstract

The utility model relates to a low-residue three-way reversing valve which comprises a valve body provided with a valve cavity in the shape of a spherical crown, a feeding port and two discharging ports, the feeding port and the discharging ports are communicated with the valve cavity, and the feeding port and the discharging ports are located in the positions, corresponding to the bottom face of the spherical crown and the spherical face, of the side wall of the valve body respectively. The valve element is arranged in the valve cavity and is in a spherical crown shape matched with the valve cavity, the spherical side wall of the valve element makes contact with the spherical side wall of the valve cavity, the end, close to the bottom face of the spherical crown, of the spherical side wall of the valve element is sealed with the valve element through a sealing structure, and the valve element can rotate relative to the valve body around a first axis which is perpendicular to the bottom face of the spherical crown and passes through the sphere center. A material guiding notch is formed in the spherical side wall of the valve element, a material guiding channel is arranged in the valve element, the feeding port is communicated with the material guiding notch through the material guiding channel, and the valve element can rotate to the material guiding notch to be communicated with one discharging port and close the other discharging port. Materials attached to the spherical side wall of the valve cavity can be scraped away, the materials are prevented from being accumulated on the inner wall of the valve body, and the residual quantity of the materials in the valve body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a low-residue three-way reversing valve. Background Art

[0002] Three-way reversing valve is a control component in fluid conveying system and is widely used in petroleum, chemical industry, natural gas, power station, metallurgy, national defense research and other fields.

[0003] The existing three-way reversing valves mainly include plunger type, flap type, three-way ball valve and other structural forms. Due to structural limitations, the valves of the above structural forms all have the problem of easily retaining a large amount of material. Utility Model Content

[0004] Based on the above description, the present invention provides a low-residue three-way reversing valve to solve the problem that a large amount of material is easily left in the valve in the related art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] This application provides a low-residue three-way reversing valve, and the technical solution adopted is as follows:

[0007] A low-residue three-way reversing valve, comprising:

[0008] A valve body having a spherical crown-shaped valve cavity therein, the valve body being provided with an inlet and two outlets connected to the valve cavity, the inlet and the outlet being located on the bottom surface of the spherical crown and the side wall of the valve body corresponding to the spherical surface, respectively;

[0009] a valve core, which is arranged in the valve cavity and is in the shape of a spherical crown adapted to the valve cavity, the spherical side wall of the valve core contacts the spherical side wall of the valve cavity, and a seal is formed between the end of the spherical side wall of the valve core close to the bottom surface of the spherical crown and the valve core via a sealing structure, the valve core can rotate relative to the valve body around a first axis that is perpendicular to the bottom surface of the spherical crown and passes through the center of the sphere, a material guide notch is provided on the spherical side wall of the valve core, a material guide channel is provided in the valve core, the material feed port and the material guide notch are connected via the material guide channel, the valve core can rotate until the material guide notch is connected to one of the material outlets, and the other material outlet is closed;

[0010] Wherein, it is suitable for scraping off the material attached to the spherical side wall of the valve cavity through the edge where the material guide gap contacts the spherical side wall of the valve cavity during the rotation of the valve core.

[0011] Preferably, the valve core is provided with a scraper notch on the spherical side wall, the scraper notch and the guide notch are located on both sides of the first plane passing through the first axis and are not connected to each other, and the valve core can be rotated until the guide notch and the scraper notch are respectively connected to the two discharge ports, which is suitable for scraping off the material attached to the spherical side wall of the valve cavity through the edge of the scraper notch in contact with the spherical side wall of the valve cavity during the rotation of the valve core.

[0012] Preferably, the material guiding notch is continuous at one end away from the material feed port in the direction of the first axis.

[0013] Preferably, the valve body includes a main body and a valve cover, the valve cavity is located in the main body, and the side of the main body corresponding to the bottom surface of the spherical crown of the valve cavity is an opening, the valve cover is connected to the main body and covers the opening, and the feed port is arranged on the valve cover.

[0014] Preferably, a material guide tube is connected to the side wall of the valve core corresponding to the bottom surface of the spherical crown, the material guide tube is coaxial with the first axis, one end of the material guide tube is connected to the material guide channel, and the material guide tube is arranged in the feed port and connected to the feed port.

[0015] Preferably, the sealing structure includes a first filling groove, which is arranged on the inner wall of the main body close to one end of the valve cover. The first filling groove is opened around the first axis. The first filling groove is filled with a first sealing filler, and a seal is formed between the valve core and the main body through the first sealing filler.

[0016] Preferably, a driving structure for driving the valve core to rotate is provided between the valve core and the valve body, and the driving structure includes a driving gear, an end face gear and a driving member, the end face gear is connected to the side wall of the valve core corresponding to the bottom surface of the spherical crown, and the end face gear is arranged around the first axis, the driven gear is rotatably connected to the valve body and meshes with the end face gear, and the driving member is used to drive the driving gear to rotate.

[0017] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects:

[0018] 1. This application utilizes a spherical crown-shaped valve cavity and a valve core adapted to the cavity. A material guide channel on the valve core connects the feed inlet and the material guide notch. The valve core rotates to connect the material guide notch to a different material outlet. The other outlet is closed by the contact between the spherical surface of the valve core and the side wall of the valve cavity, thereby achieving the function of a three-way reversing valve connecting different pipelines. Because the spherical outer wall of the valve core, near one end of the spherical crown bottom surface, forms a seal with a sealing structure, and the material guide notch is provided on the spherical side wall of the valve core, when material passes through the material guide notch, leakage from the gap between the valve core and the valve ball into the gap between the spherical crown bottom surface and the valve body is avoided, thereby ensuring the sealing of the valve. The setting of the material guide notch can, on the one hand, reduce the contact area between the valve core and the valve body, thereby making the gap area formed between the valve core and the valve body smaller, so as to reduce the residual dead angle area of the material. In addition, during the rotation of the valve core, the edge of the material guide notch contacts the spherical side wall of the valve cavity, and the material attached to the spherical side wall of the valve cavity is scraped off. The scraped material enters the material guide notch and is then discharged from the discharge port, avoiding the accumulation of material on the inner wall of the valve body, further reducing the residual amount of material in the valve body, and ensuring the normal operation of the valve.

[0019] 2. This application minimizes the gap between the valve ball and the valve body by providing a scraper notch and a guide notch. The edge of the scraper notch in contact with the spherical sidewall of the valve cavity scrapes away material adhering to the spherical sidewall of the valve cavity. This, in conjunction with the guide notch, further enhances the valve core's scraping effect on the inner wall of the valve body, thereby reducing material residue. The scraper notch and the guide notch are located on both sides of a first plane passing through a first axis and are not interconnected. The outer wall of the spherical surface of the valve core remains in contact with the sidewall of the valve cavity in the area between the scraper notch and the guide notch. When the guide notch and the scraper notch are respectively connected to the two discharge ports, the two discharge ports are not interconnected, and material scraped away by the edge of the scraper notch enters the scraper notch and can be further discharged from the discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a low-residue three-way reversing valve provided by an embodiment of the present utility model;

[0021] Figure 2 A schematic structural diagram of a valve core in a low-residue three-way reversing valve provided by an embodiment of the present utility model;

[0022] Figure 3 A schematic diagram of the drive structure in a low-residue three-way reversing valve provided in an embodiment of the present utility model.

[0023] Description of reference numerals:

[0024] 1. Valve body; 10. Valve cavity; 11. Feed port; 12. Discharge port; 13. Main body; 14. Valve cover; 141. Annular protrusion; 15. Feed pipe; 16. Discharge pipe; 2. Valve core; 21. Material guide notch; 22. Material guide channel; 23. Scraper notch; 24. Material guide pipe; 3. First packing groove; 4. First sealing packing; 5. First packing pressure ring; 6. Connecting pipe; 7. Driving gear; 8. Face gear; 9. Driving member. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0027] It will be understood that spatial relational terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be understood that in addition to the orientations shown in the figures, spatial relational terms also include different orientations of the device in use and operation. For example, if the device in the drawings is turned over, the element or feature described as "under" or "beneath" or "beneath" the other elements will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include alternative orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0028] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection" should be understood as "electrical connection", "communication connection", etc., if the connected circuits, modules, units, etc. can transmit electrical signals or data to each other.

[0029] As used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include", "comprising", "having", etc. specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0030] When a large amount of material remains in the gap between the valve and the valve core, it will cause difficulty in opening and closing the valve, or even lock the valve, for materials that are prone to scaling and icing; for radioactive materials, it is difficult to clean, and there are safety and diffusion risks; in the field of molten salt energy storage, solidified molten salt can easily cause the valve to fail; in the chemical industry, it is not conducive to precise control of powder flow.

[0031] Reference Figure 1-3 As shown, in response to the above problems, an embodiment of the present application provides a low-residue three-way reversing valve, including a valve body 1 and a valve core 2. A valve cavity 10 in the shape of a spherical crown is provided in the valve body 1. A feed port 11 and two discharge ports 12 connected to the valve cavity 10 are provided on the valve body 1. The feed port 11 and the discharge port 12 are respectively located on the bottom surface of the spherical crown and the side wall of the valve body 1 corresponding to the spherical surface. The valve core 2 is disposed in the valve cavity 10 and is shaped like a spherical cap that matches the valve cavity 10. The spherical sidewall of the valve core 2 contacts the spherical sidewall of the valve cavity 10, and a seal is formed between the end of the spherical sidewall of the valve core 2 near the bottom of the spherical cap and the valve core 2 via a sealing structure. The valve core 2 can rotate relative to the valve body 1 about a first axis perpendicular to the bottom of the spherical cap and passing through the center of the sphere. A material guide notch 21 is provided on the spherical sidewall of the valve core 2, and a material guide channel 22 is provided within the valve core 2. The feed port 11 and the material guide notch 21 are connected by the material guide channel 22. The valve core 2 can rotate until the material guide notch 21 connects to one of the material outlets 12, while closing the other material outlet 12. During the rotation of the valve core 2, the edge where the material guide notch 21 contacts the spherical sidewall of the valve cavity 10 is adapted to scrape away material adhering to the spherical sidewall of the valve cavity 10.

[0032] The material guide notch 21 is set to be through at one end away from the feed port 11 in the first axial direction, so as to increase the scraping range of the edge of the material guide notch 21 on the side wall of the valve cavity 10 when the valve core 2 rotates.

[0033] Reference Figure 1-2As shown, to further enhance the scraping effect on the inner wall of the valve cavity 10, the valve core 2 is further provided with a scraping notch 23 on the spherical sidewall. The scraping notch 23 and the material guide notch 21 are located on opposite sides of a first plane passing through the first axis and are not connected to each other. The valve core 2 can rotate until the material guide notch 21 and the scraping notch 23 are respectively connected to the two discharge ports 12. This is suitable for scraping away material adhering to the spherical sidewall of the valve cavity 10 through the edge where the scraping notch 23 contacts the spherical sidewall of the valve cavity 10 during the rotation of the valve core 2. Specifically, the scraping notch is also configured to penetrate the end away from the feed port 11 in the direction of the first axis. The sizes of the scraping notch and the material guide notch 21 are designed as required. The two feed ports 11 are arranged to be distributed on both sides of the first axis. When the valve core 2 rotates to the point where the guide notch 21 and the scraper notch 23 are connected to the two discharge ports 12 respectively, the area of the outer wall of the valve core 2 between the scraper notch and the guide notch 21 maintains contact with the area of the side wall of the valve cavity 10 between the two feed ports 11, so that the scraper notch and the guide notch 21 are not connected to each other, thereby achieving the purpose of one discharge port 12 being connected to the feed port 11 while the other discharge port 12 is closed.

[0034] Reference Figure 1 and Figure 3 As shown, the valve body 1 includes a main body 13 and a valve cover 14. The valve cavity 10 is located in the main body 13, and the side of the main body 13 corresponding to the bottom surface of the spherical crown of the valve cavity 10 is an opening. The valve cover 14 is connected to the main body 13 and covers the opening. The feed port 11 is provided on the valve cover 14. The main body 13 and the valve cover 14 are connected by end face flanges to facilitate valve assembly.

[0035] Reference Figure 1 As shown, the sealing structure is provided between the valve core 2 and the main body 13 and specifically includes a first packing groove 3. The first packing groove 3 is provided on the inner wall of the main body 13 near the valve cover 14. The first packing groove 3 is open around the first axis and is filled with a first sealing packing 4. The first sealing packing 4 forms a seal between the valve core 2 and the main body 13. Specifically, the end of the first packing groove 3 near the valve cover 14 is open to facilitate the insertion of packing. A first packing pressure ring 5 is provided. The first packing pressure ring 5 surrounds the valve core 2 and is embedded in the first packing groove 3. The first packing pressure ring 5 applies pressure to the first sealing packing 4, thereby forming a seal between the valve core 2 and the main body 13 through the first sealing packing 4. The first sealing packing 4 can be made of an appropriate material according to actual needs.

[0036] Reference Figure 1As shown, the feed port 11 is formed on the valve cover 14, coaxial with the first axis. A feed pipe 15, which surrounds the feed port 11, is connected to the side of the valve cover 14 away from the main body 13. A feed channel is formed within the feed pipe 15 and communicates with the feed port 11. A guide pipe 24 is connected to the side wall of the valve core 2 corresponding to the bottom surface of the spherical cap. This guide pipe 24 is coaxial with the first axis, one end of which communicates with the guide channel 22. The guide pipe 24 is disposed within the feed port 11 and communicates with the feed port 11. Accordingly, the guide pipe 24 passes through the feed port 11 and into the feed pipe 15, with the outer wall of the guide pipe 24 abutting against the inner wall of the feed pipe 15.

[0037] Reference Figure 1 As shown, to prevent leakage when material enters the feed pipe 15, a connecting pipe 6 is provided to cooperate with the material guide pipe 24. The connecting pipe 6 is coaxial with the first axis and one end extends into the material guide pipe 24. A flange is provided on the outside of the connecting pipe 6 to connect and secure it to the feed pipe 15. The outer wall of the end of the connecting pipe 6 that extends into the material guide pipe 24 is in contact with the inner wall of the material guide pipe 24. A second packing groove is provided on the inner wall of the end of the material guide pipe 24 away from the valve core 2. The second packing groove is formed around the first circumference and extends through the end away from the valve core 2 in the direction of the first axis. The second packing groove is filled with a second sealing packing to form a seal between the material guide pipe 24 and the connecting pipe 6. A second packing pressure ring is provided to surround the connecting pipe 6 and be embedded in the second packing groove. The second packing pressure ring applies pressure to the second sealing packing to form a seal between the material guide pipe 24 and the connecting pipe 6. The material is directly input into the material guide pipe 24 after being input from the connecting pipe 6 , and is then input into the material guide channel 22 through the material guide pipe 24 . The material is not likely to leak at the feed port 11 .

[0038] Reference Figure 1 and Figure 3 As shown, in order to realize automatic control of the switching action of the valve body 1, a driving structure for driving the valve core 2 to rotate is provided between the valve core 2 and the valve body 1. The driving structure includes a driving gear 7, an end gear 8 and a driving member 9. The end gear 8 is connected to the side wall of the valve core 2 corresponding to the bottom surface of the spherical crown, and the end gear 8 is arranged around the first axis. The driven gear is rotatably connected to the valve body 1 and meshes with the end gear 8. The driving member 9 is used to drive the driving gear 7 to rotate.

[0039] Reference Figure 1 and Figure 3As shown, specifically, the face gear 8 surrounds the guide tube 24 and is fixed to the valve core 2. The driving gear 7 is mounted on the end cover, and a through hole is provided in the end cover for the driving gear 7 to pass through, so that the driving gear 7 and the face gear 8 can be meshed. The driving member 9 can be a handwheel, an electric motor, a hydraulic motor, etc., to drive the driving gear 7 to rotate. The driving gear 7 drives the face gear 8 to rotate, and then drives the valve core 2 to rotate. In actual design, the face teeth can also be directly machined on the bottom surface of the spherical crown of the valve core 2.

[0040] Reference Figure 1 As shown, in this embodiment, an annular protrusion 141 surrounding the face gear 8 is provided on the side of the valve cover 14 near the valve chamber 10. This protrusion 141 contacts the corresponding sidewall of the bottom surface of the spherical crown of the valve core 2 to prevent direct contact between the face gear 8 and the valve cover 14, which would increase the rotational resistance of the valve core 2. During design, a ball bearing can be provided on the contact surface between the annular protrusion 141 and the valve core 2 to reduce the rotational resistance of the valve core 2 and lower the operating torque.

[0041] Reference Figure 1 As shown, in this embodiment, the main body 13 of the valve body 1 is connected to a discharge pipe 16 which is in communication with the two discharge ports 12 respectively, and the discharge pipe 16 and the main body 13 are formed as one piece.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-residue three-way reversing valve, characterized in that: include: A valve body (1) is provided with a spherical crown-shaped valve cavity (10) therein, and the valve body (1) is provided with an inlet (11) and two outlets (12) connected to the valve cavity (10), wherein the inlet (11) and the outlet (12) are respectively located on the bottom surface of the spherical crown and the side wall of the valve body (1) corresponding to the spherical surface; A valve core (2) is provided in the valve cavity (10) and is in the shape of a spherical crown adapted to the valve cavity (10); the spherical side wall of the valve core (2) contacts the spherical side wall of the valve cavity (10), and a seal is formed between the end of the spherical side wall of the valve core (2) close to the bottom surface of the spherical crown and the valve core (2) through a sealing structure; the valve core (2) can rotate relative to the valve body (1) around a first axis perpendicular to the bottom surface of the spherical crown and passing through the center of the sphere; a material guide notch (21) is provided on the spherical side wall of the valve core (2); a material guide channel (22) is provided in the valve core (2); the feed port (11) and the material guide notch (21) are connected through the material guide channel (22); the valve core (2) can rotate until the material guide notch (21) is connected to one of the discharge ports (12), and the other discharge port (12) is closed; Wherein, it is suitable for scraping off the material attached to the spherical side wall of the valve cavity (10) through the edge where the material guide notch (21) contacts the spherical side wall of the valve cavity (10) during the rotation of the valve core (2).

2. The low-residue three-way reversing valve according to claim 1, characterized in that: The valve core (2) is provided with a scraper notch (23) on the spherical side wall, and the scraper notch (23) and the guide notch (21) are located on both sides of a first plane passing through a first axis and are not connected to each other. The valve core (2) can be rotated until the guide notch (21) and the scraper notch (23) are respectively connected to the two discharge ports (12), and are suitable for scraping off the material attached to the spherical side wall of the valve cavity (10) through the edge of the scraper notch (23) contacting the spherical side wall of the valve cavity (10) during the rotation of the valve core (2).

3. The low-residue three-way reversing valve according to claim 2, characterized in that: The material guiding notch (21) and the material scraping notch (23) are connected at one end away from the material feeding port (11) in the first axial direction.

4. The low-residue three-way reversing valve according to claim 1, characterized in that: The valve body (1) includes a main body (13) and a valve cover (14), the valve cavity (10) is located in the main body (13), and the side of the main body (13) corresponding to the bottom surface of the spherical crown of the valve cavity (10) is an opening, the valve cover (14) is connected to the main body (13) and covers the opening, and the feed port (11) is provided on the valve cover (14).

5. The low-residue three-way reversing valve according to claim 4, characterized in that: A material guide tube (24) is connected to the side wall of the valve core (2) corresponding to the bottom surface of the spherical crown. The material guide tube (24) is coaxial with the first axis. One end of the material guide tube (24) is connected to the material guide channel (22). The material guide tube (24) is arranged in the feed port (11) and is connected to the feed port (11).

6. The low-residue three-way reversing valve according to claim 4, characterized in that: The sealing structure includes a first filling groove (3), which is provided on the inner wall of the main body (13) close to one end of the valve cover (14), and the first filling groove (3) is opened around the first axis. The first filling groove (3) is filled with a first sealing filler (4), and a seal is formed between the valve core (2) and the main body (13) through the first sealing filler (4).

7. The low-residue three-way reversing valve according to claim 1, characterized in that: A driving structure for driving the valve core (2) to rotate is provided between the valve core (2) and the valve body (1), the driving structure comprising a driving gear (7), an end face gear (8) and a driving member (9), the end face gear (8) being connected to a side wall of the valve core (2) corresponding to the bottom surface of the spherical crown, and the end face gear (8) being arranged around a first axis, the driving gear (7) being rotatably connected to the valve body (1) and meshing with the end face gear (8), and the driving member (9) being used to drive the driving gear (7) to rotate.

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