A self-locking sealing device for protecting gases

Abstract

The utility model discloses a kind of self-locking sealing devices for protecting gas, it includes tooling bottom plate, valve body, inflation positioning pin, stainless steel ball, compression spring and L type quick connector;Tooling bottom plate side is installed in equipment, other side is connected with valve body, inflation positioning pin is slidably assembled in valve body, its bottom is provided with air hole and is communicated with chamber;Stainless steel ball and compression spring are arranged in chamber, and L type quick connector is fixed on other side of tooling bottom plate;When inflating, gas pushes inflation positioning pin and pushes out stainless steel ball, air hole is communicated with chamber;When not inflating, compression spring lifts stainless steel ball, disconnects air hole and chamber, realizes sealing;The application realizes self-locking sealing function by mechanical structure, significantly improves sealing performance stability, is applicable to inert gas protection, vacuum system or explosion-proof occasion, ensures system safety and stability.

Description

Technical Field

[0001] This utility model relates to the technical field of high-frequency brazing technology, and in particular to a self-locking sealing device for protective gas. Background Technology

[0002] In the field of high-frequency brazing technology, the use of shielding gas is a crucial step in ensuring the welding quality of workpieces. By filling with shielding gas, oxygen and other harmful components in the air can be effectively isolated, preventing oxidation or contamination of the workpiece during the welding process. However, in existing welding equipment, the sealing performance of the shielding gas is often difficult to guarantee, especially the problem of gas leakage after filling. This leakage not only affects welding quality but may also lead to resource waste and reduced production efficiency. Traditional shielding gas sealing devices usually rely on manual operation to achieve sealing, but this method has many shortcomings. For example, the sealing effect of manual operation fluctuates greatly, and the response speed is slow, easily affecting the continuity and stability of production due to improper operation or delays. In addition, traditional devices require frequent maintenance to maintain sealing performance during long-term use, increasing operational complexity and maintenance costs. Therefore, there is an urgent need for a shielding gas sealing device that can automatically maintain a sealed state, quickly open and close, and is easy to operate, to solve the problems of unreliable sealing, cumbersome operation, and high maintenance costs in existing technologies. This invention aims to provide an efficient and stable solution through the combination of mechanical structure and self-locking mechanism, thereby improving the safety and reliability of high-frequency brazing processes. Utility Model Content

[0003] The purpose of this invention is to provide a self-locking sealing device for protecting gas, so as to overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A self-locking sealing device for protecting gases. The device achieves automatic locking of the seal through a mechanical structure, thereby avoiding the problems of fluctuating sealing performance and response delays caused by traditional manual operation.

[0005] This invention provides a self-locking sealing device for protecting gas, comprising a tooling base plate, a valve body, an inflation positioning pin, a stainless steel ball, a compression spring, and an L-shaped quick connector. The tooling base plate serves as the basic support platform for the entire device, with one side fixedly mounted on the required equipment and the other side connected to the valve body. An inflation positioning pin is slidably mounted inside the valve body. The inflation positioning pin has a through-hole structure in the middle and a vent hole at its bottom end, which communicates with the interior of the inflation positioning pin. Furthermore, the inflation positioning pin reciprocates axially within the valve body driven by gas pressure.

[0006] Specifically, a countersunk hole is provided on the base plate of the tooling, which is fixedly connected to the valve body to form a relatively sealed chamber. A stainless steel ball and a compression spring are disposed within the chamber. The stainless steel ball has a guide groove inside to restrict its movement to vertical direction only. The compression spring is engaged within the guide groove of the stainless steel ball, with its top abutting against the ball, providing an upward force to lift it. Furthermore, an L-shaped quick connector is fixedly installed on the other side of the base plate, communicating with the chamber to enable gas input or output.

[0007] Furthermore, the working principle of this utility model is as follows: S1. When gas is injected into the valve body, the gas pressure pushes the inflation positioning pin downward along the axial direction, and the bottom plane of the inflation positioning pin contacts the stainless steel ball and pushes it out. S2. After the stainless steel ball is pushed out, the compression spring contracts, so that the vent hole at the bottom end of the inflation positioning pin communicates with the chamber. S3. Gas flows through the central through-hole of the inflation positioning pin into the chamber and finally flows out from the L-shaped quick connector. S4. When inflation stops, the gas pressure disappears, the compression spring returns to its extended state, and pushes the stainless steel ball upward. S5. The stainless steel ball abuts against the bottom plane of the inflation positioning pin, pushing the inflation positioning pin upward, disconnecting the communication between the vent hole and the chamber, thereby achieving a sealed state.

[0008] This invention achieves a self-locking sealing function through the aforementioned mechanical structure. Specific innovations and their implementation are as follows: First, the device employs a design combining spring pressure and pneumatic drive to ensure the sealing state is maintained even without external force. The stainless steel ball remains in a pre-tightened state under the action of the compression spring. When the gas pressure is released, the stainless steel ball quickly returns to its original position and cooperates with the inflation positioning pin to complete the sealing action. Second, the through-hole design of the inflation positioning pin, combined with the bottom vent, allows gas to flow smoothly during inflation while effectively blocking the gas passage in the non-inflated state. Furthermore, the guide groove design of the stainless steel ball restricts its degree of freedom of movement, ensuring accurate and reliable movement trajectory and preventing sealing failure due to deviation.

[0009] Specifically, the sealing performance stability of this invention is reflected in the following aspects: the compression spring continuously provides a constant sealing force, eliminating the problem of fluctuating sealing effect caused by uneven force in traditional manual operation. Furthermore, the modular design facilitates the replacement and maintenance of each component, reducing the overall cost of long-term use. Specifically, the connection between the tooling base plate and the valve body adopts a fixed installation method to ensure the sealing of the chamber; the L-shaped quick connector design simplifies the connection operation of the gas pipeline and improves work efficiency.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: The self-locking sealing function achieved through a mechanical structure significantly improves the stability of the sealing performance. Specifically, the device ensures smooth gas flow when inflated, while in the non-inflated state, a reliable sealing effect is achieved through the cooperation of stainless steel balls and inflation positioning pins. Furthermore, the one-button operation design allows the inflation and sealing processes to be completed in a short time, achieving highly consistent sealing without additional tools, significantly improving production efficiency. In addition, the modular design of the seal not only facilitates replacement and maintenance but also reduces long-term economic costs, demonstrating high practical value.

[0011] This invention is particularly suitable for specific environments requiring prevention of gas leakage or the entry of external contaminants, such as inert gas protection, vacuum systems, or explosion-proof applications. Through its self-locking sealing mechanism, this device effectively ensures the safety and stability of the system and is widely used in technical fields such as high-frequency brazing in the refrigeration industry. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a partial cross-sectional view of another state of the valve body, ignoring a portion of the valve body in this utility model; Figure 4 This is a three-dimensional structural view of the inflatable positioning pin of this utility model.

[0013] Attached image annotations: 1. Inflatable positioning pin; 2. Valve body; 3. Stainless steel ball; 4. Compression spring; 5. Tooling base plate; 6. L-shaped quick connector; 7. Vent hole; 8. Chamber. Detailed Implementation

[0014] A self-locking sealing device for protecting gases, its core function is to achieve automatic locking and sealing through a mechanical structure, while also featuring convenient operation, stable sealing performance, and low maintenance costs. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0015] like Figures 1 to 4As shown, the self-locking sealing device of this utility model mainly includes a tooling base plate 5, a valve body 2, an inflation positioning pin 1, a stainless steel ball 3, a compression spring 4, and an L-shaped quick connector 6. The tooling base plate 5 serves as the basic support platform for the entire device; one side is fixedly installed on the required equipment, and the other side is connected to the valve body 2. The inflation positioning pin 1 is slidably mounted inside the valve body 2. The inflation positioning pin 1 has a through-hole structure in the middle and a vent hole 7 at its bottom end, which communicates with the interior of the inflation positioning pin 1. A countersunk hole is provided on the tooling base plate 5, which is fixedly connected to the valve body 2 to form a relatively sealed chamber 8. The stainless steel ball 3 and the compression spring 4 are disposed inside the chamber 8. The stainless steel ball 3 has a guide groove inside to restrict its movement to only vertical direction. The compression spring 4 is engaged in the guide groove of the stainless steel ball 3, and its top abuts against the stainless steel ball 3, providing an upward force to lift the stainless steel ball 3. In addition, an L-shaped quick connector 6 is fixedly installed on the other side of the tooling base plate 5. The L-shaped quick connector 6 is connected to the chamber 8 to realize the input or output of gas.

[0016] In practical applications, when protective gas needs to be introduced into the system, the gas enters the valve body 2 from the external pipeline via the L-shaped quick connector 6. The gas pressure pushes the inflation positioning pin 1 axially downwards, and the bottom plane of the inflation positioning pin 1 contacts the stainless steel ball 3 and pushes it out. At this time, the compression spring 4 contracts, connecting the vent hole 7 at the bottom end of the inflation positioning pin 1 with the chamber 8. The gas flows through the central structure of the inflation positioning pin 1, through the vent hole 7, into the chamber 8, and finally flows out from the L-shaped quick connector 6 to the target position. During this process, the gas flow path is formed by the central structure of the inflation positioning pin 1 and the vent hole 7, ensuring smooth gas flow while preventing leakage.

[0017] When inflation stops, the gas pressure disappears, the compression spring 4 returns to its extended state, and pushes the stainless steel ball 3 upward. The stainless steel ball 3 abuts against the bottom plane of the inflation positioning pin 1, pushing the inflation positioning pin 1 upward and disconnecting the vent 7 from the chamber 8. At this time, the stainless steel ball 3 remains in a pre-tightened state under the action of the compression spring 4, ensuring a tight seal between the sealing surfaces. Through the design of the above mechanical structure, this utility model achieves a self-locking sealing function, which can maintain a stable sealing state without external force.

[0018] One of the core innovations of this invention lies in its design combining spring pressure and pneumatic drive. The compression spring 4 continuously provides a constant sealing force, eliminating the problem of fluctuating sealing performance caused by uneven force in traditional manual operation. Furthermore, the guide groove design of the stainless steel ball 3 restricts its freedom of movement, ensuring precise and reliable trajectory and preventing sealing failure due to misalignment. The through-hole structure of the inflation positioning pin 1, combined with the bottom vent 7, allows gas to flow smoothly during inflation while effectively blocking the gas passage in the non-inflated state.

[0019] Furthermore, the modular design of this invention significantly improves the practicality and economy of the device. For example, the connection between the tooling base plate 5 and the valve body 2 adopts a fixed installation method to ensure the sealing of the chamber 8; the design of the L-shaped quick connector 6 simplifies the connection operation of the gas pipeline and improves work efficiency. Each component, such as the stainless steel ball 3, the compression spring 4, and the inflation positioning pin 1, can be replaced individually, reducing the overall cost of long-term use. In particular, this invention is applicable to protective gas sealing scenarios in the field of high-frequency brazing technology in the refrigeration industry, effectively preventing gas leakage or the entry of external contaminants, and ensuring the safety and stability of the system.

[0020] In specific applications, this invention can be widely used in inert gas protection, vacuum systems, or explosion-proof environments. For example, in high-frequency brazing, the workpiece needs to be operated in an environment filled with inert gas to prevent oxidation. This invention, through its one-button operation design, allows the inflation and sealing processes to be completed in a short time, achieving a highly consistent seal without additional tools, significantly improving production efficiency. Furthermore, the modular design of the seal not only facilitates replacement and maintenance but also reduces long-term economic costs, demonstrating high practical value.

[0021] In summary, this utility model achieves a self-locking sealing function through a mechanical structure, significantly improving the stability of the sealing performance. The device ensures smooth gas flow when inflated, while in the non-inflated state, a reliable sealing effect is achieved through the cooperation of the stainless steel ball 3 and the inflation positioning pin 1. Its one-button operation design makes the inflation and sealing process efficient and convenient, while the modular design further reduces maintenance costs. (See attached...) Figures 1 to 4 The specific structure and operating principle of this utility model are fully disclosed, and the technical solution meets the needs of practical applications.

[0022] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A self-locking sealing device for protecting gas, characterized in that: The fixture includes a base plate (5), a valve body (2), an inflation positioning pin (1), a stainless steel ball (3), a compression spring (4), and an L-shaped quick connector (6). One side of the base plate (5) is fixedly installed on the equipment, and the other side is connected to the valve body (2). The inflation positioning pin (1) is slidably fitted inside the valve body (2). The inflation positioning pin (1) has a through-hole structure in the middle and a vent hole (7) at the bottom end. The vent hole (7) is connected to the inside of the inflation positioning pin (1). The base plate (5) is equipped with an L-shaped quick connector (6). A countersunk hole is provided, which is fixedly connected to the valve body (2) to form a chamber (8). A stainless steel ball (3) and a compression spring (4) are provided in the chamber (8). The stainless steel ball (3) has a guide groove inside to restrict it to move up and down only in the vertical direction. The compression spring (4) is engaged in the guide groove of the stainless steel ball (3) and its top abuts against the stainless steel ball (3). An L-shaped quick connector (6) is fixedly provided on the other side of the tooling base plate (5). The L-shaped quick connector (6) is connected to the chamber (8).

2. The self-locking sealing device as described in claim 1, characterized in that: The pneumatic positioning pin (1) moves reciprocally along the axial direction within the valve body (2) driven by gas pressure.

3. The self-locking sealing device as described in claim 2, characterized in that: The bottom plane of the inflatable positioning pin (1) is further defined to contact the stainless steel ball (3) under the action of gas pressure and push it out, so that the vent (7) is connected to the chamber (8).

4. The self-locking sealing device as described in claim 1, characterized in that: When there is no gas pressure, the compression spring (4) returns to its extended state and pushes the stainless steel ball (3) upward, pushing the inflation positioning pin (1) upward to disconnect the connection between the vent (7) and the chamber (8).

5. The self-locking sealing device as described in claim 4, characterized in that: The stainless steel ball (3) is further limited to always being pre-tightened under the action of the compression spring (4) to ensure that the sealing surface is tightly fitted.

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