A top-off plastic fitting device for preventing refilling

Abstract

The utility model discloses a kind of anti-repeated filling top-break type plastic joint devices, including the connecting seat of connecting valve body, and the tower-shaped buckle of being clamped on connecting seat;The air inlet of communicating valve body is formed on the connecting seat, the tower-shaped buckle includes the mounting portion of being clamped with connecting seat, and the sealing portion of being integrally formed with mounting portion, the valve stem is rotationally arranged in the valve body, the valve stem is extruded sealing portion downwards, to make the connecting portion of sealing portion and mounting portion break and separate from mounting portion, and drive sealing portion abuts sealing air inlet.

Description

Technical Field

[0001] This utility model relates to the field of bottle valve technology, specifically to a top-break plastic connector device for preventing repeated filling. Background Technology

[0002] High-pressure gas cylinders are very important in industrial, medical, and scientific research fields. Their safety depends entirely on the core component, the cylinder valve. The most commonly used type on the market now is the refillable cylinder valve. This type of valve is connected to the cylinder mouth by a thread, allowing it to be opened and closed multiple times and refilled repeatedly to meet daily use needs. While existing refillable bottle valves can be used for multiple fillings, they rely entirely on external inspection procedures and the standardization of personnel operations. The valve body and threaded connection are prone to metal fatigue and stress corrosion under cyclic pressure and frequent loading and unloading, which may lead to structural failure. Furthermore, the sealing interface gradually wears down during repeated opening and closing, which may cause leakage, posing a significant risk. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model proposes a top-break plastic joint device to prevent repeated filling.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A top-break plastic connector device for preventing repeated filling includes a connecting seat for connecting a valve body and a tower-shaped buckle that is snapped onto the connecting seat. The connecting seat forms an air inlet for connecting the valve body. The tower-shaped buckle includes a mounting part that snaps into the connecting seat and a sealing part that is integrally formed with the mounting part. A valve stem is rotated inside the valve body. The valve stem presses the sealing part downward to break the connection between the sealing part and the mounting part and detach it from the mounting part, thereby driving the sealing part to abut against the sealing air inlet.

[0005] Preferably, the mounting part has a positioning protrusion, and the connecting seat has a positioning groove for the positioning protrusion to be inserted. Through the above improvements, the positioning protrusion and the positioning groove cooperate to achieve quick installation of the tower buckle and ensure the stability of the cooperation between the mounting part of the tower buckle and the connecting seat.

[0006] Preferably, the sealing part includes a sealing protrusion for abutting the air inlet, an extrusion post formed on the sealing protrusion, and a plurality of connecting protrusions extending radially along the extrusion post. At least one connecting protrusion is connected to the positioning protrusion and forms a breakage part. With the above improvement, when the valve stem is pressed down, it will abut against the extrusion post. Since the mounting part is fixed between the valve body and the connecting seat, the connecting protrusion breaks and detaches from the connecting protrusion, so that the sealing protrusion abuts against the air inlet under the action of the valve body.

[0007] Preferably, the sealing part has a sealing groove, and a sealing ring is provided on the sealing groove. Through the above improvements, the sealing ring will abut against the air inlet to improve the sealing effect.

[0008] Preferably, the sealing protrusion is provided with a guide slope. With the above improvement, during the installation of the sealing ring, the seal can slide along the guide slope and be placed into the sealing groove, thereby improving the convenience of sealing ring installation.

[0009] Preferably, the connecting protrusion and the positioning protrusion partially overlap along the extrusion direction. Through the above improvements, the distance between the connecting protrusion and the positioning protrusion accounts for 25% of the total length of the connecting protrusion, which ensures the reliability of the connection between the connecting protrusion and the mounting part, while avoiding excessive pressure required for the connecting protrusion to break, making it easier for users to use.

[0010] Preferably, the width of the connecting protrusion is 40%-60% of the width of the positioning protrusion. Through the above improvements, excessive pressure is avoided when the connecting protrusion breaks, making it easier for users to use.

[0011] Preferably, one end of the mounting part abuts against the valve body and the other end abuts against the connecting seat. Through the above improvements, it is ensured that the mounting part is pressed between the valve body and the connecting seat, thus ensuring the reliability of the mounting part's fixation.

[0012] Preferably, the outer periphery of the sealing ring is arc-shaped. Through the above improvements, the tightness of the seal between the sealing ring and the air inlet is enhanced.

[0013] Preferably, the connecting seat and the tower buckle are made of plastic. Through the above improvements, the manufacturing cost is reduced, and the sealing part is more prone to breakage, making it easier for users to use.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: By setting a connecting seat at the bottom of the valve body and attaching a tower-shaped buckle to the connecting seat, an air inlet connecting the valve body is formed on the connecting seat. The tower-shaped buckle includes a mounting part that engages with the connecting seat and a sealing part that is integrated with the mounting part. When the user needs to open the bottle valve, the valve stem can be turned clockwise. The bottom of the valve stem touches the tower-shaped buckle. Continuing to apply a certain torque value clockwise will break the sealing part. At this time, the sealing part will block the air inlet under the action of the valve stem. When the valve body is rotated counterclockwise, the valve stem will move away from the sealing part to open the valve. The pressure of the medium inside the bottle will push open the broken sealing part, achieving the valve opening effect. When the medium in the cylinder is used up, when refilling through the air outlet of the valve body, the air pressure during refilling will make the broken sealing part fit more tightly with the air inlet inside the connecting seat, making it impossible to refill the medium again, thus achieving a non-refilling effect to ensure the safety of the user during use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the tower-shaped buckle of this utility model; Figure 3 This is a schematic diagram of the structure of the connector of this utility model; Figure 4 This is a schematic diagram of the structure of the plastic connector and valve body of this utility model. In the diagram: 1. Connecting seat; 2. Tower-shaped buckle; 3. Valve body; 4. Valve stem; 5. Air inlet; 1.1 Mounting part; 1.2 Sealing part; 2.1 Positioning protrusion; 2.2 Positioning groove; 3.1 Sealing protrusion; 3.2 Extrusion column; 3.3 Connecting protrusion; 3.4 Sealing groove; 3.5 Sealing ring; 3.6 Guide slope; 3.7 Mounting hole; Detailed Implementation

[0016] 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.

[0017] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0018] like Figure 1-4 As shown, a top-break plastic connector device for preventing repeated filling includes a connecting seat 1 that connects to the valve body 3, and a tower-shaped buckle 2 that is snapped onto the connecting seat 1.

[0019] Specifically, the connecting seat 1 forms an air inlet 5 for connecting the valve body 3. The tower-shaped buckle 2 includes a mounting part 1.1 that snaps into the connecting seat 1, and a sealing part 1.2 that is integrally formed with the mounting part 1.1. A valve stem 4 is rotated inside the valve body 3. The valve stem 4 presses the sealing part 1.2 downward so that the connection between the sealing part 1.2 and the mounting part 1.1 breaks and detaches from the mounting part 1.1, and drives the sealing part 1.2 to abut against the sealing air inlet 5.

[0020] During the use of the cylinder valve, when the user needs to open the cylinder valve, the valve stem 4 can be turned clockwise. The bottom of the valve stem 4 touches the tower-shaped buckle 2. Continuing to apply a certain torque value clockwise will break the sealing part 1.2. At this time, the sealing part 1.2 will block the air inlet 5 under the action of the valve stem 4. When the valve body 3 is rotated counterclockwise, the valve stem 4 will move away from the sealing part 1.2 to open the valve. The pressure of the medium inside the cylinder will push open the broken sealing part 1.2, achieving the valve opening effect. When the medium in the cylinder is used up, when it is refilled through the air outlet of the valve body 3, the air pressure during filling will make the broken sealing part 1.2 fit more tightly with the air inlet 5 inside the connecting seat 1, making it impossible to refill the medium, thus achieving a non-refilling effect to ensure the safety of the user during use.

[0021] like Figure 1-4 As shown, as a further explanation of the implementation of the tower-shaped buckle 2 and the connecting seat 1, the mounting part 1.1 is provided with a positioning protrusion 2.1, and the connecting seat 1 is provided with a positioning groove 2.2 for the positioning protrusion 2.1 to be inserted. By using the positioning protrusion 2.1 and the positioning groove 2.2 to cooperate, the tower-shaped buckle 2 can be quickly installed, and the stability of the cooperation between the mounting part 1.1 and the connecting seat 1 is ensured.

[0022] Specifically, the sealing part 1.2 includes a sealing protrusion 3.1 for abutting against the air inlet 5, an extrusion post 3.2 formed on the sealing protrusion 3.1, and a plurality of connecting protrusions 3.3 extending radially along the extrusion post 3.2, at least one connecting protrusion 3.3 being connected to the positioning protrusion 2.1 and forming a break portion.

[0023] When the valve stem 4 is pressed down, it will abut against the extrusion column 3.2. Since the mounting part 1.1 is fixed between the valve body 3 and the connecting seat 1, the connecting protrusion 3.3 breaks and disengages from the positioning protrusion 2.1, causing the sealing protrusion 3.1 to abut against the air inlet 5 under the action of the valve body 3. At this time, the bottle valve is in the closed state. When the valve body 3 rotates counterclockwise, the valve stem 4 will move away from the sealing part 1.2 to open the valve. The pressure of the medium inside the bottle will push open the broken sealing part 1.2, achieving the valve opening effect.

[0024] Furthermore, a sealing groove 3.4 is formed on the sealing part 1.2, and a sealing ring 3.5 is provided on the sealing groove 3.4. When the sealing part 1.2 descends, the sealing ring 3.5 will abut against the air inlet 5, greatly increasing the sealing performance between the sealing part 1.2 and the connecting seat 1.

[0025] Preferably, the sealing protrusion 3.1 has a guide slope 3.6. During the installation of the sealing ring 3.5, the seal can slide along the guide slope 3.6 and be placed into the sealing groove 3.4, improving the ease of installation of the sealing ring 3.5.

[0026] Preferably, the outer periphery of the sealing ring 3.5 is arc-shaped to improve the tightness of the fit between the sealing ring 3.5 and the air inlet 5.

[0027] Preferably, the connector 1 and the tower buckle 2 are made of plastic, which reduces manufacturing costs and makes the sealing part 1.2 more prone to breakage, making it easier for users to use.

[0028] In addition, the connecting protrusion 3.3 and the positioning protrusion 2.1 partially overlap along the extrusion direction. The distance between the connecting protrusion 3.3 and the mounting part 1.1 accounts for 25% of the total length of the connecting protrusion 3.3. This ensures the reliability of the connection between the connecting protrusion 3.3 and the mounting part 1.1, while avoiding excessive pressure required for the connecting protrusion 3.3 to break, making it easier for users to operate.

[0029] In addition, the width of the connecting protrusion 3.3 is 40%-60% of the width of the positioning protrusion 2.1, to avoid excessive pressure required for the connecting protrusion 3.3 to break, making it easier for users to operate. like Figure 3 , Figure 4 As shown, to further explain the cooperation between the connecting seat 1 and the valve body 3, the connecting seat 1 and the valve body 3 are threaded together. An external thread is provided on the outer periphery of the connecting seat 1, and an internal thread is provided inside the valve body 3. This not only improves the convenience of installing the connecting seat 1, but also ensures the reliability of fixing the mounting part 1.1.

[0030] Preferably, the bottom of the connector 1 has a hexagonal mounting hole 3.7, which allows for quick installation of the connector 1.

[0031] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A top-break type plastic connector device for preventing repeated filling, characterized in that, Includes a connecting seat (1) for connecting the valve body (3), and a tower-shaped buckle (2) that is snapped onto the connecting seat (1); The connecting seat (1) forms an air inlet (5) for connecting the valve body (3). The tower-shaped buckle (2) includes a mounting part (1.1) that snaps into the connecting seat (1) and a sealing part (1.2) integrally formed with the mounting part (1.1). A valve stem (4) is rotated inside the valve body (3). The valve stem (4) presses the sealing part (1.2) downward so that the connection between the sealing part (1.2) and the mounting part (1.1) breaks off and detaches from the mounting part (1.1), and drives the sealing part (1.2) to abut against the sealing air inlet (5).

2. The anti-refilling top-break plastic connector device according to claim 1, characterized in that: The mounting part (1.1) has a positioning protrusion (2.1), and the connecting seat (1) has a positioning groove (2.2) for the positioning protrusion (2.1) to be inserted.

3. The anti-refilling top-break plastic connector device according to claim 2, characterized in that: The sealing part (1.2) includes a sealing protrusion (3.1) for abutting the air inlet (5), an extrusion post (3.2) formed on the sealing protrusion (3.1), and a plurality of connecting protrusions (3.3) extending radially along the extrusion post (3.2), at least one connecting protrusion (3.3) being connected to the positioning protrusion (2.1) and forming a break portion.

4. The anti-refilling top-break plastic connector device according to claim 1, characterized in that: The sealing part (1.2) has a sealing groove (3.4), and a sealing ring (3.5) is provided on the sealing groove (3.4).

5. The anti-refilling top-break plastic connector device according to claim 3, characterized in that: The sealing protrusion (3.1) has a guide slope (3.6).

6. The anti-refilling top-break plastic connector device according to claim 3, characterized in that: The connecting protrusion (3.3) and the positioning protrusion (2.1) partially overlap along the extrusion direction.

7. The anti-refilling top-break plastic joint device according to claim 3, characterized in that: The width of the connecting protrusion (3.3) is 40%-60% of the width of the positioning protrusion (2.1).

8. The anti-refilling top-break plastic connector device according to claim 1, characterized in that: The mounting part (1.1) abuts against the valve body (3) at one end and against the connecting seat (1) at the other end.

9. A top-break plastic connector device for preventing repeated filling according to claim 4, characterized in that: The outer periphery of the sealing ring (3.5) is arranged in an arc shape.

10. A top-break plastic connector device for preventing repeated filling according to claim 1, characterized in that: The connecting seat (1) and the tower buckle (2) are made of plastic.

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