Valve element and ball valve

Abstract

The utility model discloses a valve element and a ball valve, and relates to the technical field of vacuum ball valves, the valve element comprises a valve element body, the valve element body is provided with a communication channel, a first exhaust hole and a second exhaust hole, one end of the communication channel is used for being communicated with a high-pressure side, and one end of the communication channel is used for being communicated with a vacuum side; the first exhaust hole and the second exhaust hole communicate with the communicating channel, the first exhaust hole is used for communicating with a gap between the valve element body and the cylinder body, and the second exhaust hole can communicate with the vacuum side; the ball valve comprises a cylinder body and a valve element, the valve element is located in the cylinder body, a flange is connected to the cylinder body and used for being connected with the high-pressure side or the vacuum side, and a blocking plate is further arranged on the cylinder body. Gas between the cylinder body and the valve element can be quickly exhausted, reliable sealing can be effectively achieved under different vacuum levels, gas permeation and leakage are prevented, and meanwhile the quick stability of opening and closing of the ball valve is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of vacuum ball valve technology, and in particular to a valve core and a ball valve. Background Technology

[0002] Vacuum ball valves are mainly used in vacuum systems to cut off gas flow. They only require a 90-degree rotation of the ball to close the gas path, offering advantages such as low required torque and rapid action. However, in high vacuum environments, traditional ball valves are prone to micro-leakage between the cylinder and the ball due to temperature changes and thermal expansion. This leakage, caused by residual gas between the cylinder and the ball, slowly leaks into the vacuum system after the valve closes, preventing the system from reaching a low vacuum level for an extended period or causing a drop in the system's vacuum level. Utility Model Content

[0003] The purpose of this invention is to provide a valve core and ball valve, which allows gas between the cylinder and the valve core to be discharged quickly, effectively achieving reliable sealing under different vacuum levels, preventing gas infiltration and leakage, while ensuring the rapid and stable opening and closing of the ball valve.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a valve core, including: a valve core body, the valve core body having a connecting channel, a first vent hole and a second vent hole, one end of the connecting channel being used to connect with a high-pressure side, and the other end of the connecting channel being used to connect with a vacuum side, the first vent hole and the second vent hole being respectively connected to the connecting channel, the first vent hole being used to connect with the gap between the valve core body and the cylinder, and the second vent hole being able to connect with the vacuum side.

[0006] Preferably, the first exhaust port is arranged perpendicular to the communicating channel.

[0007] Preferably, the second exhaust port is arranged perpendicular to the communicating channel.

[0008] Preferably, the first exhaust port and the second exhaust port are arranged perpendicularly.

[0009] This utility model provides a ball valve, including a cylinder body and a valve core, the valve core being located in the cylinder body, a flange being connected to the cylinder body for connecting to a high-pressure side or a vacuum side, and a blocking plate being provided on the cylinder body.

[0010] Preferably, the first vent is located at the connection between the valve core and the valve stem.

[0011] Preferably, a sealing gasket and a sealing ring are provided between the valve core and the cylinder body. The outer side of the sealing gasket contacts the cylinder body, the inner side of the sealing gasket contacts the valve core, there is a gap between the outer surface of the sealing gasket and the cylinder body, and the sealing ring is located between the outer surface of the sealing gasket and the cylinder body.

[0012] Preferably, the outer surface of the sealing gasket is provided with a first inclined surface and a second inclined surface, and the sealing ring is located between the first inclined surface and the cylinder body.

[0013] Preferably, the inclination of the first inclined plane is greater than that of the second inclined plane.

[0014] Preferably, the sealing gasket is made of PTFE, non-metallic materials, or soft metal.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This invention enables the rapid discharge of gas between the cylinder and the valve core by opening a first vent and a second vent, thereby allowing the vacuum system to quickly reach the target vacuum value, shortening the vacuum pumping time and reducing the risk of leakage. Rapid venting can make the operation of the ball valve more stable. When the ball valve is opened or closed, the rapid venting through the first and second vents can reduce the instability caused by gas pressure difference and improve the control accuracy of the system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the valve core of this utility model;

[0019] Figure 2 This is a front view of the ball valve of this utility model;

[0020] Figure 3 Side view of the ball valve of this utility model Figure 1 ;

[0021] Figure 4 Side view of the ball valve of this utility model Figure 2 ;

[0022] Figure 5 This is a top view of the ball valve of this utility model;

[0023] Figure 6 for Figure 5 AA section view;

[0024] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0025] Figure 8 This is a schematic diagram of the sealing gasket of this utility model;

[0026] Figure 9 This is a schematic diagram showing the distribution of the plug plate and flange of the two-way ball valve of this utility model;

[0027] Figure 10 This is a schematic diagram of the distribution of the plug plate and flange of the three-way ball valve of this utility model;

[0028] Figure 11 This is a schematic diagram showing the distribution of the plug plate and flange of the four-way ball valve of this utility model.

[0029] Figure 12 A curve comparing the pumping speed of a ball valve in the prior art with that of the ball valve of this utility model;

[0030] In the diagram: 1-valve core body, 2-connecting channel, 3-first vent, 4-second vent, 5-cylinder body, 6-valve stem, 7-O-ring, 8-cylinder, 9-connecting shaft, 10-connecting bracket, 11-screw, 12-sealing gasket, 13-sealing ring, 14-first bevel, 15-second bevel, 16-flange, 17-blocking plate. Detailed Implementation

[0031] 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.

[0032] The purpose of this invention is to provide a valve core and ball valve, which allows gas between the cylinder and the valve core to be discharged quickly, effectively achieving reliable sealing under different vacuum levels, preventing gas infiltration and leakage, while ensuring the rapid and stable opening and closing of the ball valve.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figure 1As shown, this embodiment provides a valve core, including: a valve core body 1, on which a connecting channel 2, a first exhaust port 3, and a second exhaust port 4 are provided. One end of the connecting channel 2 is used to connect with the high-pressure side, and the other end of the connecting channel 2 is used to connect with the vacuum side. The first exhaust port 3 and the second exhaust port 4 are respectively connected to the connecting channel 2. The first exhaust port 3 is used to connect with the gap between the valve core body 1 and the cylinder 5, and the second exhaust port 4 can connect with the vacuum side.

[0036] In this embodiment, the first exhaust hole 3 is perpendicular to the connecting channel 2, the second exhaust hole 4 is perpendicular to the connecting channel 2, and the first exhaust hole 3 and the second exhaust hole 4 are perpendicular to each other.

[0037] In this embodiment, the valve core is provided with a first vent hole 3 and a second vent hole 4 on the valve core body 1. This allows the gas between the cylinder body 5 and the valve core to be quickly and completely discharged through the first vent hole 3 and the second vent hole 4 when the ball valve is closed. The vacuum system can then be quickly evacuated to a low vacuum level, thus avoiding the problem of gas slowly seeping out from the gap between the valve core and the cylinder body 5 during use after the ball valve is closed.

[0038] Example 2

[0039] like Figures 1 to 12 As shown, this embodiment provides a ball valve, preferably a two-way ball valve. The ball valve in this embodiment is not limited to a pneumatically controlled vacuum ball valve; it can also be used for manually or electrically controlled ball valves. It includes a cylinder body 5 and a valve core as described in Embodiment 1. The valve core is located in the cylinder body 5. A first vent hole 3 is located at the connection between the valve core and the valve stem 6. An O-ring 7 is provided between the valve stem 6, the cylinder body 5, and the valve core. A cylinder 8 is connected to the valve stem 6 via a connecting shaft 9. A connecting bracket 10 is provided between the connecting shaft 9 and the cylinder body 5. The connecting bracket 10 is connected to the cylinder body 5 via screws 11. This embodiment, by opening the first vent hole 3 and the second vent hole 4 at the valve core and valve stem 6, as well as on the vacuum side, allows the gas between the cylinder body 5 and the valve core to be quickly discharged. This enables the vacuum system to quickly reach the target vacuum value, shortening the vacuum pumping time and reducing the risk of leakage. Rapid venting makes the operation of the ball valve more stable. When the ball valve is opened or closed, the rapid venting through the first vent hole 3 and the second vent hole 4 reduces instability caused by gas pressure differences and improves the control accuracy of the system.

[0040] In this embodiment, a sealing gasket 12 and a sealing ring 13 are provided between the valve core and the cylinder body 5. The sealing gasket 12 is made of PTFE, non-metallic or soft metal. The outer side of the sealing gasket 12 is in line contact with the cylinder body 5, and the inner side of the sealing gasket 12 is in surface contact with the valve core. There is a gap between the outer surface of the sealing gasket 12 and the cylinder body 5. The outer surface of the sealing gasket 12 is provided with a first inclined surface 14 and a second inclined surface 15. The inclination of the first inclined surface 14 is greater than that of the second inclined surface 15. There are gaps between the first inclined surface 14 and the second inclined surface 15 and the cylinder body 5. The sealing ring 13 is located between the first inclined surface 14 and the cylinder body 5. This embodiment, by setting a sealing gasket 12 with a first inclined surface 14 and a second inclined surface 15, allows the sealing gasket 12 to function as an elastic sheet during use. This allows the sealing gasket 12 to be compressed along the direction from the cylinder body 5 towards the valve core, resulting in a tighter contact between the sealing gasket 12 and the valve core, and a more reliable seal. Furthermore, when the valve core compresses the sealing gasket 12, the gap between the outer surface of the sealing gasket 12 and the cylinder body 5 provides the sealing gasket 12 with a certain deformation space. When the valve core rotates to reduce the compression on the sealing gasket 12, the sealing gasket 12 can recover its deformation. In addition, because the sealing gasket 12 has a certain deformation space, the valve core can reduce the wear on the sealing gasket 12, thus extending the service life of the sealing gasket 12. The angled design between the sealing gasket 12 and the cylinder body 5 in this embodiment is not limited to two-way ball valves, but can also be applied to three-way ball valves and four-way ball valves.

[0041] In this embodiment, by setting the outer surface of the sealing gasket 12 as an inclined plane, a certain angle is formed between the outer surface of the sealing gasket 12 and the cylinder body 5, which improves the sealing degree of the sealing gasket 12 to the valve core. Combined with the first exhaust port 3 and the second exhaust port 4, under the same conditions, the time for the ball valve to reach the ultimate vacuum is shortened, and the ultimate vacuum degree is improved.

[0042] In this embodiment, a flange 16 is connected to the cylinder body 5. The flange 16 is used to connect to the high-pressure side or the vacuum side, and can also be used to connect to other pipelines. A plug plate 17 is also provided on the cylinder body 5. The plug plate 17 is used to cut off unnecessary interfaces on the valve core. The flange 16 and the plug plate 17 are detachably connected to the cylinder body 5. This embodiment provides detachable flange 16 and plug plate 17, so that the valve core can be used as a universal valve core. By providing flange 16 and / or plug plate 17 on the cylinder body 5, three-way ball valves and four-way ball valves can be assembled. This solves the problem in the prior art that two-way ball valves, three-way ball valves, and four-way ball valves all require new mold processing. When forming two-way ball valves, three-way ball valves, and four-way ball valves, the connecting channel 2 and the second vent hole 4 on the valve core are adaptively modified.

[0043] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A valve core, characterized in that: include: The valve core body has a connecting channel, a first exhaust port and a second exhaust port. One end of the connecting channel is used to connect with the high-pressure side and the other end is used to connect with the vacuum side. The first exhaust port and the second exhaust port are respectively connected to the connecting channel. The first exhaust port is used to connect with the gap between the valve core body and the cylinder. The second exhaust port can connect with the vacuum side.

2. The valve core according to claim 1, characterized in that: The first exhaust port is perpendicular to the connecting channel.

3. The valve core according to claim 1, characterized in that: The second exhaust port is perpendicular to the communicating channel.

4. The valve core according to claim 1, characterized in that: The first exhaust port and the second exhaust port are arranged perpendicularly.

5. A ball valve, characterized in that: The device includes a cylinder body and a valve core as described in any one of claims 1-4, the valve core being located within the cylinder body, a flange being connected to the cylinder body for connection to a high-pressure side or a vacuum side, and a plug plate being provided on the cylinder body.

6. The ball valve according to claim 5, characterized in that: The first vent is located at the connection between the valve core and the valve stem.

7. The ball valve according to claim 5, characterized in that: A sealing gasket and a sealing ring are provided between the valve core and the cylinder body. The outer side of the sealing gasket contacts the cylinder body, and the inner side of the sealing gasket contacts the valve core. There is a gap between the outer surface of the sealing gasket and the cylinder body. The sealing ring is located between the outer surface of the sealing gasket and the cylinder body.

8. The ball valve according to claim 7, characterized in that: The outer surface of the sealing gasket is provided with a first inclined surface and a second inclined surface, and the sealing ring is located between the first inclined surface and the cylinder body.

9. The ball valve according to claim 8, characterized in that: The inclination of the first inclined plane is greater than that of the second inclined plane.

10. The ball valve according to claim 7, characterized in that: The sealing gasket is made of PTFE, non-metallic materials, or soft metals.

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