Vacuum cavity with high air tightness

Abstract

The utility model discloses a vacuum cavity with high air tightness, belongs to the technical field of vacuum equipment, and aims to improve the sealing performance of a vacuum system and reduce gas leakage so as to enhance the stability and reliability of the whole vacuum environment. The vacuum cavity main body is made of a high-strength material and is precisely machined to ensure that the vacuum cavity main body has good pressure resistance and corrosion resistance, so that the vacuum cavity main body is suitable for various complicated industrial application scenes. According to the structural design, the main body of the vacuum cavity and the pipeline connecting flange are fixed through the welding technology, compared with a traditional bolt connection or sealing ring mode, the welding technology can enable the flange and the main body of the vacuum cavity to form an integrated structure, possible sealing gaps are fundamentally eliminated, and therefore the sealing performance of the vacuum cavity is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum equipment technology, specifically relating to a high airtightness vacuum cavity. Background Technology

[0002] Currently, flange connections for vacuum chambers primarily employ bolt connections or sealant sealing. While bolt connections offer a degree of airtightness, the seam between the flange and the chamber can still lead to minor leaks, affecting vacuum maintenance. Furthermore, bolt connections require high assembly precision and significant tightening torque, increasing installation difficulty and maintenance costs. While sealant sealing improves airtightness, the sealant may age and crack over long-term use, leading to seal failure.

[0003] There is a vacuum chamber (publication number: CN208310535U). The vacuum chamber in the prior art has the following disadvantages:

[0004] 1. Risk of leakage: There is a seam between the flange and the vacuum chamber body. Even with high-precision machining and high-quality sealing rings, the seal may still fail due to minor assembly errors, thermal expansion, or long-term use, affecting the airtightness of the vacuum chamber. Therefore, there is an urgent need for a vacuum chamber with high airtightness. Summary of the Invention

[0005] The main objective of this invention is to provide a high-airtightness vacuum cavity, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high airtightness vacuum chamber, including a vacuum chamber body, a pipe connection flange, a connection fixing plate, a threaded connection hole, and a flange welding point. The connection fixing plates are provided on both sides of the vacuum chamber body, and the threaded connection hole is provided on the connection fixing plate. The pipe connection flange is provided in the middle of the vacuum chamber body.

[0007] The pipe connection flange and the vacuum chamber body are connected by welding. The welding position of the pipe connection flange and the vacuum chamber body is the flange welding point. The flange welding point is welded on the inside and fully penetrated.

[0008] Furthermore, threaded connection holes are provided in the middle of both sides of the vacuum chamber body.

[0009] Furthermore, the connecting fixing piece is welded to the lower ends of both sides of the vacuum chamber body.

[0010] This utility model has the following beneficial effects:

[0011] 1. This device uses a welding process to connect the flange of the vacuum chamber body to the pipeline. Welding the flange into the vacuum chamber body makes it a single structure, which significantly increases the sealing performance of the vacuum chamber. At the same time, this process is simple and easy to operate, reduces construction difficulty, and brings the following benefits: Significantly improves the sealing performance of the vacuum chamber: By connecting the flange to the vacuum chamber body by welding, making it a single structure, the seam between the flange and the chamber body under the traditional bolt connection method is eliminated, fundamentally reducing the possible risk of leakage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a side view of the structure of this utility model;

[0014] Figure 3 This is a schematic cross-sectional view of the present invention.

[0015] Figure 4 This is a schematic diagram of the structure of part C of this utility model;

[0016] In the diagram: 1. Vacuum chamber body; 2. Pipe connection flange; 3. Connection fixing plate; 4. Threaded connection hole; 5. Flange welding point. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0020] Please see Figure 1-4 This utility model provides an integrated technical solution:

[0021] In this embodiment, a high airtightness vacuum chamber includes a vacuum chamber body 1, a pipe connection flange 2, a connecting fixing plate 3, a threaded connection hole 4, and a flange welding point 5. The connecting fixing plates 3 are provided on both sides of the vacuum chamber body 1, and the threaded connection holes 4 are provided on the connecting fixing plates 3. The pipe connection flange 2 is provided in the middle of the vacuum chamber body 1.

[0022] The pipe connection flange 2 and the vacuum chamber body 1 are connected by welding. The welding position of the pipe connection flange 2 and the vacuum chamber body 1 is flange welding point 5. The flange welding point 5 is welded on the inside and fully penetrated.

[0023] In this embodiment, threaded connection holes 4 are provided in the middle of the two sides of the vacuum chamber body 1.

[0024] In this embodiment, the connecting fixing piece 3 is welded to the lower ends of both sides of the vacuum chamber body 1.

[0025] This embodiment provides a highly airtight vacuum chamber, including a vacuum chamber body, pipe connection flanges, connecting fixing plates, threaded connection holes, flange welding points, and other components. The vacuum chamber design optimizes the flange connection method to improve sealing performance while simplifying installation and maintenance.

[0026] Structural design and function of each component:

[0027] Vacuum chamber body: It is a cavity structure used to create and maintain an internal vacuum environment.

[0028] Its material is made of high-strength, corrosion-resistant metal to ensure long-term stability.

[0029] Pipe connection flange: Located in the middle of the vacuum chamber body, it connects to the external vacuum pipeline. It is fixed to the vacuum chamber body using welding technology, achieving a highly airtight connection and avoiding leakage problems that may occur with traditional flange connections.

[0030] Flange welding points: Located at the connection between the pipe connection flange and the vacuum chamber body, a full penetration welding process is used to ensure a strong weld. This welding method reduces seams, improves the overall airtightness of the structure, and enables the equipment to maintain a high vacuum state for extended periods.

[0031] Connecting fixing plates: Located at the lower ends of both sides of the vacuum chamber body, these plates provide reinforcement and support. They allow the vacuum chamber to be securely mounted to a support frame or other device, preventing shaking or displacement during use.

[0032] Threaded connection hole: Located in the middle of the side of the vacuum chamber body, it is used to connect other auxiliary equipment or fixed components by bolts. This structure improves the compatibility of the device, making it suitable for different installation requirements.

[0033] Usage process:

[0034] Installation and Fixing: First, install the vacuum chamber onto the support frame or equipment frame using the connecting fixing plate, and then fix it with bolts to ensure stability.

[0035] The threaded connection hole allows for further connection with external devices, improving the system's integration.

[0036] Pipe connection: Connect the external vacuum pipe to the pipe connection flange and use appropriate fastening methods (such as flange gaskets) to ensure an airtight connection.

[0037] Because the flange is fixed by welding, no additional bolts or sealant are required, which reduces the risk of leakage and improves the long-term stability of the system.

[0038] Initiating vacuum pumping: When the system starts up, the vacuum pump begins to work, gradually reducing the air pressure in the vacuum chamber.

[0039] Thanks to the integrated welding design, the vacuum level inside the cavity will not decrease due to leakage at the flange joints, ensuring stable system operation.

[0040] Maintenance and disassembly: Due to the use of full penetration welding process, the seal is reliable, reducing the maintenance needs of traditional bolted connections that require regular inspection and tightening.

[0041] If the equipment needs to be replaced or upgraded, the fixing device can be disassembled through the threaded connection hole to facilitate replacement or adjustment of the installation position.

[0042] This embodiment improves the sealing performance of the vacuum chamber by optimizing the welding process, reduces construction difficulty, enhances the stability and service life of the equipment, and facilitates installation and maintenance, making it suitable for various high vacuum applications.

[0043] The foregoing description illustrates 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-airtightness vacuum chamber, comprising a vacuum chamber body (1), a pipe connection flange (2), a connection fixing plate (3), a threaded connection hole (4), and a flange welding point (5), characterized in that: The vacuum chamber body (1) is provided with connecting and fixing plates (3) on both sides, and the connecting and fixing plates (3) are provided with threaded connection holes (4). The vacuum chamber body (1) is provided with a pipe connection flange (2) in the middle. The pipe connection flange (2) and the vacuum chamber body (1) are connected by welding. The welding position of the pipe connection flange (2) and the vacuum chamber body (1) is the flange welding point (5). The flange welding point (5) is welded on the inside and fully penetrated.

2. The high airtightness vacuum cavity according to claim 1, characterized in that: The vacuum chamber body (1) has threaded connection holes (4) in the middle of both sides.

3. The high airtightness vacuum cavity according to claim 1, characterized in that: The connecting fixing piece (3) is welded to the lower ends of both sides of the vacuum chamber body (1).

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