Ceramic valve core structure avoiding sticking

Abstract

The utility model discloses a kind of ceramic valve core structures to avoid bonding, including coaxially close rotation installation's valve core stator and valve core rotor;The center of the bonding surface of valve core stator is provided with first through-hole, and the outer periphery of first through-hole is provided with multiple second through-holes evenly distributed;Flow guide groove is set up on the bonding surface of valve core rotor, for the conduction of first through-hole and certain second through-hole;Arc slot is set up on the bonding surface of valve core rotor, and arc slot does not interfere with first through-hole, second through-hole, flow guide groove;Third through-hole is set up in arc slot and is communicated with outside.The utility model effectively reduces the non-sealing contact surface area of valve core working surface, balances working surface and external air pressure, to avoid valve core bonding.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment, and in particular to a ceramic valve core structure that avoids adhesion. Background Technology

[0002] In the field of online water quality monitoring, multi-channel valves are one of the core components, and ceramic valve core multi-channel valves are one solution for multi-channel applications. However, ceramic valve core multi-channel valves require high flatness of the working surfaces of the valve core stator and rotor. Combined with the inherent properties of ceramic, the valve core stator and rotor rub against each other during operation, squeezing out air from the working surfaces (excluding holes and grooves), creating a vacuum. This can cause the two ceramic pieces to stick together, making it difficult for the valve core rotor to rotate, ultimately leading to the ceramic valve core multi-channel valve jamming and failure, preventing the switching of channels. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention proposes a ceramic valve core structure that avoids adhesion.

[0004] The specific technical solution is as follows: A ceramic valve core structure that avoids adhesion includes a valve core stator and a valve core rotor that are coaxially and tightly mounted in rotation; a first through hole is provided at the center of the mating surface of the valve core stator, and a plurality of uniformly distributed second through holes are provided around the outer periphery of the first through hole; A flow guide groove is provided on the mating surface of the valve core rotor to connect the first through hole and a certain second through hole; an arc-shaped groove is provided on the mating surface of the valve core rotor, and the arc-shaped groove does not interfere with the first through hole, the second through hole, and the flow guide groove; a third through hole is provided in the arc-shaped groove to communicate with the outside.

[0005] Furthermore, the guide channel is arranged radially and is in the shape of a straight line.

[0006] Furthermore, the arc-shaped groove is located between the first through hole and the second through hole, with the center of the valve core rotor as its center.

[0007] Furthermore, the surface-to-surface seal between the valve core stator and the valve core rotor adopts a hard seal structure.

[0008] Furthermore, the contact surfaces of the valve core stator and the valve core rotor are both made of high-hardness materials, including ceramics, hard engineering plastics, titanium alloys, nickel-based alloys, and cobalt-based high-temperature alloys.

[0009] Furthermore, the outer periphery of the contact surface of the valve core rotor is provided with a lower stepped surface.

[0010] The beneficial effects of this utility model are: The ceramic valve core structure proposed in this utility model, which avoids adhesion, effectively reduces the non-sealing contact area of ​​the valve core working surface, reduces friction, balances the working surface with the external air pressure, and avoids valve core adhesion, thereby avoiding the failure problem of multi-channel valves with ceramic valve cores caused by valve core adhesion. Attached Figure Description

[0011] Figure 1 This is a front view of the ceramic valve core structure that avoids adhesion in an embodiment of this utility model.

[0012] Figure 2 This is a cross-sectional view of the ceramic valve core structure that avoids adhesion in the embodiments of this utility model.

[0013] Figure 3 This is a schematic diagram of the rotor structure of the ceramic valve core structure that avoids adhesion in the embodiments of this utility model.

[0014] In the figure, valve core stator 1, first through hole 1-1, second through hole 1-2; valve core rotor 2, guide groove 2-1, arc groove 2-2, third through hole 2-3, rotor mirror surface 2-4, lower step surface 2-5. Detailed Implementation

[0015] The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. The purpose and effects of the present invention will become clearer as a result. Further detailed description of the present invention will be provided below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0016] like Figure 1 and Figure 2 As shown, a ceramic valve core structure that avoids adhesion includes a valve core stator 1 and a valve core rotor 2 arranged coaxially and tightly. The working surface of the valve core structure has two mating surfaces: the mating surface of the valve core stator 1 and the mating surface of the valve core rotor 2, which are opposite to each other and tightly fitted. A first through hole 1-1 is opened at the center of the mating surface of the valve core stator 1, and a plurality of second through holes 1-2 of the same size are evenly distributed around the periphery of the first through hole 1-1. The distance between the first through hole 1-1 and the second through hole 1-2 is r1.

[0017] like Figure 3 As shown, a guide groove 2-1 is provided on the mating surface of the valve core rotor 2 to connect the first through hole 1-1 of the valve core stator 1 with a certain second through hole 1-2. In this embodiment, the guide groove 2-1 is arranged radially and is in the shape of a straight line. When the valve core rotor 2 is rotated, the guide groove 2-1 rotates, thereby switching the connection between the first through hole 1-1 and different second through holes 1-2.

[0018] Because the working surfaces of the valve core stator 1 and the valve core rotor 2 are required to fit tightly and seal, except for the first through hole 1-1 and the corresponding second through hole 1-2 connected by the guide groove 2-1, other holes must not have air leakage, liquid leakage, or liquid leakage. Therefore, the flatness requirements of the working surfaces of the valve core stator 1 and the valve core rotor 2 are relatively high. In addition, due to the characteristics of ceramics themselves, the valve core stator 1 and the valve core rotor 2 will rub against each other during operation, which will squeeze out the air in the plane of the mating working surface except for the holes and grooves, forming a vacuum. The valve core stator 1 and the valve core rotor 2 are prone to sticking, making it difficult for the valve core rotor 2 to rotate.

[0019] To address the aforementioned issues, this structure optimizes the valve core rotor 2, reducing the area of ​​the mating working surface and balancing the internal and external air pressure. Specifically, an arc-shaped groove 2-2 is added to the mating surface of the valve core rotor 2, thereby reducing the non-sealed contact area between the valve core stator 1 and the working surface of the valve core rotor 2, and reducing friction. A third through hole 2-3 is provided within the arc-shaped groove 2-2, allowing the valve core working surface to be connected to the external atmosphere, preventing the formation of a vacuum on the working surface when the valve core stator 1 and the valve core rotor 2 remain stationary for a long time, preventing valve core adhesion, and thus achieving low friction and durable sealing. Preferably, the arc-shaped groove 2-2 is centered on the center of the valve core rotor 2 and does not interfere with the first through hole 1-1, the second through hole 1-2, or the guide groove 2-1 (i.e., they coincide in the axial direction, causing connection), with an arc radius less than r1. The axis of the third through hole 2-3 on the working surface is located on the extension line of the guide groove 2-1.

[0020] Furthermore, the surface-to-surface seal between the valve core stator 1 and the valve core rotor 2 adopts a hard seal structure, and the contact surfaces of both are made of high-hardness materials, not limited to ceramic parts, but also hard engineering plastics, hard metal materials (such as titanium alloys, nickel-based alloys, cobalt-based high-temperature alloys, etc.).

[0021] Furthermore, the outer periphery of the contact surface of the valve core rotor 2 is provided with a lower step surface 2-5, thereby reducing the area contact between the valve core rotor 2 and the valve core stator 1, thereby reducing the torsional torque of the motion.

[0022] It will be understood by those skilled in the art that the above descriptions are merely preferred embodiments of the utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. All modifications and equivalent substitutions made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A ceramic valve core structure that avoids adhesion, characterized in that, It includes a valve core stator (1) and a valve core rotor (2) that are coaxially and tightly mounted in rotation; a first through hole (1-1) is provided at the center of the mating surface of the valve core stator (1), and a plurality of evenly distributed second through holes (1-2) are provided on the outer periphery of the first through hole (1-1). A guide groove (2-1) is provided on the mating surface of the valve core rotor (2) to guide the first through hole (1-1) and a certain second through hole (1-2); an arc groove (2-2) is provided on the mating surface of the valve core rotor (2), and the arc groove (2-2) does not interfere with the first through hole (1-1), the second through hole (1-2), and the guide groove (2-1); a third through hole (2-3) is provided in the arc groove (2-2) to communicate with the outside.

2. The ceramic valve core structure for preventing adhesion according to claim 1, characterized in that, The guide channel (2-1) is arranged radially and is in the shape of a straight line.

3. The ceramic valve core structure for preventing adhesion according to claim 1, characterized in that, The arc-shaped groove (2-2) is located between the first through hole (1-1) and the second through hole (1-2), with the center of the valve core rotor (2) as the center.

4. The ceramic valve core structure for preventing adhesion according to claim 1, characterized in that, The surface-to-surface seal between the valve core stator (1) and the valve core rotor (2) adopts a hard seal structure.

5. The ceramic valve core structure for preventing adhesion according to claim 4, characterized in that, The contact surfaces of the valve core stator (1) and the valve core rotor (2) are both made of high-hardness materials, including: ceramics, hard engineering plastics, titanium alloys, nickel-based alloys, and cobalt-based high-temperature alloys.

6. The ceramic valve core structure for preventing adhesion according to claim 1, characterized in that, The valve core rotor (2) has a stepped surface (2-5) on the outer periphery of the contact surface.

Images