A pressure relief fitting

Abstract

The utility model provides a kind of pressure relief connector, including connector body, its inside is equipped with external connection part and the first cavity and the second cavity being communicated with each other, pressure relief passage being equipped in the first cavity is communicated with outside, and external connection part is communicated with the second cavity;Valve structure, including valve seat and valve core, valve seat is installed in the first cavity, valve core is movably arranged in valve seat along the axial direction, and one end of valve core extends second cavity, and sealing structure is equipped on valve core;Operating mechanism, with valve seat pivot joint, and with valve core linkage drive valve core displacement along the axial direction to control the communication or close of first cavity and second cavity.The application provides a kind of pressure relief connector, can synchronous fast close gas cylinder valve and release connector internal pressure, to effectively reduce gas leakage, protect sealing element, and greatly improve the convenience and safety of connector disassembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of inflation equipment, and specifically relates to a pressure relief connector. Background Technology

[0002] Existing top-pressure type gas cylinder valve connectors are widely used for high-pressure gas filling and pressure testing, facilitating real-time monitoring of cylinder pressure. However, in practical use, especially when disassembling the connector after filling or testing, existing products face a series of significant problems.

[0003] First, the high-pressure gas remaining inside the connector exerts strong pressure and friction on the threads, making disassembly extremely difficult. Second, during forced disassembly, the sealing ring on top of the valve is prone to rotation and damage under high pressure, leading to seal failure, shortening product lifespan, and posing safety hazards.

[0004] More importantly, current top-pressure gas cylinder connectors on the market suffer from a lack of synchronization between depressurization and valve closure. Traditional threaded pin-type depressurization methods require screwing to close the valve, but top-pressure gas cylinder valves require a certain stroke to fully close. This screwing action cannot meet the rapid response required by the valve's stroke. This results in the valve failing to close quickly during screwing and disassembly, causing high-pressure gas to continuously leak from the cylinder, wasting gas, affecting user experience, and potentially posing safety risks. Utility Model Content

[0005] In order to solve the above-mentioned problems in the prior art, this application provides a pressure relief connector to solve the above-mentioned technical defects.

[0006] This utility model proposes a pressure relief connector, comprising:

[0007] The connector body has an external connection part and a first cavity and a second cavity that are interconnected inside. The first cavity has a pressure relief channel that connects to the outside, and the external connection part is connected to the second cavity.

[0008] The valve structure includes a valve seat and a valve core. The valve seat is installed in a first cavity, and the valve core is axially movable and disposed in the valve seat. One end of the valve core extends out of a second cavity, and a sealing structure is provided on the valve core.

[0009] An operating mechanism, pivotally connected to the valve seat and linked with the valve core, drives the valve core to move axially to control the connection or closure of the first and second chambers. This application, by setting an axially movable valve core and sealing structure, and coordinating with the operating mechanism to drive the valve core, achieves rapid connection or closure between the first and second chambers, thereby realizing the function of simultaneously closing the gas cylinder valve and joint to relieve pressure, improving disassembly convenience and usage safety.

[0010] In some specific embodiments, the second cavity is provided with an interface structure for connecting to the gas cylinder, and a sealing ring is provided at the interface structure. By setting the interface structure and providing the sealing ring in the second cavity, a stable connection can be made with the gas cylinder to form a reliable seal, preventing gas leakage and ensuring the sealing reliability during high-pressure gas filling or testing.

[0011] In some specific embodiments, a limiting mechanism is also provided, which includes a limiting pin disposed on the connector body and a limiting groove disposed on the outer wall of the valve seat. By providing a limiting mechanism, the rotation or axial displacement of the valve seat in the connector body can be restricted, ensuring the stability of the valve structure installation position, preventing structural loosening or misalignment during use, and improving the overall structural reliability and operational consistency.

[0012] In some specific embodiments, a pin hole is provided on the connector body, and a limiting pin is detachably disposed in the pin hole. The use of a detachable limiting pin structure makes the limiting mechanism more flexible during installation, maintenance, or replacement, facilitating quick positioning and assembly by operators and improving maintenance convenience.

[0013] In some specific embodiments, the valve core is provided with an annular protrusion structure, and the sealing structure is located between the annular protrusion structure and the bottom of the first cavity. The annular protrusion structure can restrict the displacement of the valve core on the one hand, and facilitate the stable installation of the sealing structure on the other hand, so as to form an effective seal between the valve core and the bottom of the first cavity, improve the sealing performance of the joint during gas input, detection or depressurization process, and prevent gas leakage.

[0014] In some specific embodiments, the pressure relief channel is located on the side wall between the valve seat and the bottom of the first cavity. This location allows for rapid pressure relief, reducing disassembly difficulties or safety risks caused by high internal pressure.

[0015] In some specific embodiments, the operating mechanism is a switch handle. As an operating mechanism, the switch handle provides direct and convenient operation, enabling users to quickly open and close the valve core, thus improving operational efficiency.

[0016] In some specific embodiments, the pivot end of the switch handle is provided with a protrusion, and the two sides of the protrusion have wedge-shaped surfaces. The protrusion and the wedge-shaped surfaces on both sides of the handle end can form a stable engagement or limiting structure with the connector body, providing sufficient rotational force and self-locking effect during opening and closing, thereby improving the stability and safety of operation.

[0017] In some specific embodiments, the external connection unit is connected to a pressure gauge. This connection allows for real-time monitoring of the gas pressure inside the cylinder during use, meeting various application needs such as gas filling and testing, and enhancing the device's functionality and practicality.

[0018] In some specific embodiments, the external connector is connected to the endotracheal tube connector. This connection allows for flexible connection to external gas sources or devices, meeting diverse needs for gas transmission and system integration, and improving the connector's versatility and expandability.

[0019] The pressure relief connector provided by this utility model has the following beneficial effects:

[0020] The design of the valve core structure that can move axially and the operating mechanism allows the gas cylinder valve to be closed quickly and the pressure relief channel to be connected before disassembling the connector. This releases the residual gas inside the connector in a timely manner and effectively avoids problems such as difficulty in disassembling the connector or damage to the sealing ring caused by high-pressure gas.

[0021] In view of the problems of pressure relief delay and gas leakage in traditional screw-on closing structures, this application realizes the valve closing and pressure relief actions are completed simultaneously by rotating the operating mechanism, which greatly reduces gas leakage during operation and improves safety, economy and user experience.

[0022] By setting up an external connection part, it can flexibly connect different external devices such as pressure gauges and air pipes, and is suitable for various application scenarios such as gas cylinder filling, vacuuming, and pressure detection, thereby improving the integrated function and adaptability of the connector.

[0023] The device features a compact structure, intuitive operation, and easy assembly, disassembly, and maintenance, thanks to its switch handle and detachable limit pins, meeting the demands of high-frequency and high-requirement operations. Attached Figure Description

[0024] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0025] Figure 1 This is a schematic diagram of the structure of a pressure relief connector according to an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional structural schematic diagram of a pressure relief connector according to a specific embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram illustrating the application of a pressure relief connector connected to a pressure gauge according to a specific embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram illustrating the application of a pressure relief connector connected to a gas pipe connector according to a specific embodiment of the present invention.

[0029] The meanings of the numbers in the diagram are as follows: 1-Connector body, 11-External mounting hole, 12-Pressure relief channel, 13-Connection hole, 14-Sealing ring A, 2-Valve seat, 21-Limit groove, 3-Operating mechanism, 4-Valve core, 41-Valve core protrusion, 42-Sealing ring B, 5-Limit pin, 6-Gas cylinder, 7-Gas cylinder interface, 8-Pressure gauge, 9-Gas pipe connector. Detailed Implementation

[0030] In the following detailed description, reference is made to the accompanying drawings, which form part of the detailed description and illustrate illustrative specific embodiments in which the present invention may be practiced. In this regard, directional terms such as “top,” “bottom,” “left,” “right,” “up,” “down,” etc., are used with reference to the orientation of the described figures. Because components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0031] This utility model proposes a pressure relief connector. Figure 1 A schematic diagram of a pressure relief connector according to an embodiment of the present invention is shown, as follows: Figure 1 As shown, the external main structure of the pressure relief connector includes a connector body 1, a valve seat 2, and an operating mechanism. The connector body 1 is the main structure of the entire connector. On the side of the connector body 1, there is an external mounting part, specifically, an external mounting hole 11, which can be used to connect external equipment. On the top of the connector body 1, there is an operating mechanism, specifically, a switch handle 3. The switch handle 3 is pivotally connected to the valve seat 2 above the connector body 1. The valve seat 2 has an opening structure and a rotating shaft. The switch handle 3 is rotatably mounted on the opening structure of the valve seat 2 via the rotating shaft.

[0032] Figure 2 A cross-sectional structural schematic diagram of a pressure relief connector according to a specific embodiment of the present invention is shown, as follows: Figure 2As shown, the connector body 1 includes an upper first cavity and a lower second cavity, which are connected by a connecting hole. The first cavity is used to install the valve structure; the inner wall of the second cavity has an interface structure for connecting the gas cylinder. Specifically, this interface structure is a threaded structure, and a sealing ring A14 is provided at the interface structure to ensure the sealing performance when the connector is connected to the gas cylinder. The valve seat 2 is installed on the first cavity, and is also assembled and fixed by a threaded connection. The function of the valve seat 2 is to support and guide the valve core 4. The valve core 4 is located inside the valve seat 2 and can move up and down axially. The lower middle part of the valve core 4 has a valve core protrusion 41, which is an annular protrusion structure. The outer diameter of the valve core protrusion 41 is smaller than the inner diameter of the first cavity, and the lower outer diameter of the valve core 4 is smaller than the inner diameter of the connecting hole between the two cavities, so as to form a gas flow channel between them. This structure can be used to limit the valve core 4, preventing it from falling out of the connection hole between the two cavities. The bottom of the valve core protrusion 41 is also provided with a sealing ring B 42 to ensure the sealing between the valve core 4 and the first cavity. The lower end of the valve core 4 can pass through the connection hole between the two cavities and extend into the second cavity to press against the gas cylinder switch that mates with the pressure relief connector.

[0033] In a specific embodiment, the pivot end of the switch handle 3 is provided with a protrusion, and the two sides of the protrusion have wedge-shaped surfaces. The switch handle 3 is positioned as follows: Figure 2 When the valve is in the horizontal position (closed), the valve core 4 is pressed down and extends into the second chamber to trigger the top pressure to open the gas cylinder valve and output high-pressure gas. At this time, the sealing ring B 42 at the valve core protrusion 41 of the valve core 4 blocks the connection between the first and second chambers. The pressure relief connector does not work at this time, and the high-pressure gas can be output to other pipelines or equipment through the external mounting hole 11. If the switch handle 3 is raised to the vertical position (open), the valve core 4 is pushed up by the gas cylinder valve, the gas cylinder valve is closed, and the high-pressure gas in the connector enters the first chamber through the connection hole between the two chambers and is discharged from the connector body 1 through the pressure relief channel 12, realizing a rapid pressure relief operation.

[0034] In a specific embodiment, the pressure relief channel 12 is located on the inner side wall of the connector body 1 and communicates with the inner first cavity for high-pressure gas release. It is located on the side wall between the valve seat 2 and the bottom of the first cavity, and the valve core protrusion 41 will not affect its conduction with the first cavity when the valve core 4 is displaced, so as to ensure the pressure relief effect.

[0035] In a preferred embodiment, the pressure relief channel 12 can be adapted to a silencer module to effectively reduce noise during gas emission. For example, a pneumatic solenoid valve silencer can be connected to the external port of the pressure relief channel 12, thereby improving the user-friendliness of this invention.

[0036] In a specific embodiment, the connector body 1 and the valve seat 2 are further provided with limiting structures, specifically including a limiting groove 21 on the valve seat 2, which is an annular groove with a certain width on the surface of the valve seat 2; and a positioning pin 5, which is disposed in a positioning pin hole on the connector body 1, specifically, it can be installed into the positioning pin hole by means of thread engagement, which is convenient for installation and removal. During assembly, the valve seat 2 is first installed into the first cavity of the connector body 1, and then the positioning pin 5 is locked into the limiting groove 21 through the positioning pin hole, so as to prevent the valve seat 2 from falling out of the first cavity under the action of high pressure gas during multiple pressure relief processes, thereby improving the safety of the pressure relief connector.

[0037] In a specific embodiment, the external mounting hole 11 communicates with the second cavity through the connecting hole 13, so that high-pressure gas inside the gas cylinder can be obtained when the pressure relief connector is connected to the gas cylinder. In a specific application embodiment... Figure 3 This diagram illustrates the application of a pressure relief connector connected to a pressure gauge according to a specific embodiment of the present invention, as shown below. Figure 3 As shown, a pressure gauge 8 is installed on the external mounting hole 11. The pressure relief connector is sealed to the connector 7 of the gas cylinder 6 through the interface structure of its second cavity. When the pressure relief connector is closed, the gas pressure inside the cylinder can be monitored in real time. In another specific application embodiment, Figure 4 This diagram illustrates the application of a pressure relief connector connected to a gas pipe connector according to a specific embodiment of the present invention. Figure 4 As shown, with Figure 3 Similarly, the connector body 1 is connected to the connector 7' of the gas cylinder 6. On the side of the connector body 1, a gas pipe connector 9 is connected through the external mounting hole 11. One end of the connector is connected to the gas input pipeline. When the gas cylinder 6 is filled, the gas cylinder valve is opened by screwing on the threaded connection to input high-pressure gas. In order to meet the requirements of higher filling purity, the bidirectional conduction characteristic of this top-pressure gas cylinder valve can also be used to evacuate the inside of the gas cylinder before filling.

[0038] The pressure relief connector provided in this application achieves simultaneous rapid closure of the gas cylinder valve and pressure relief of the connector through the coordinated operation of the valve core and the operating mechanism. It solves the problems of gas leakage, difficulty in disassembling the connector and failure of sealing caused by asynchronous closure and pressure relief in the prior art. It has the advantages of compact structure, convenient operation, reliable sealing and strong adaptability, which significantly improves the safety and user experience in the process of gas cylinder filling and testing, and has good application prospects.

[0039] Obviously, those skilled in the art can make various modifications and changes to the embodiments of this utility model without departing from the spirit and scope of this utility model. In this way, this utility model is also intended to cover such modifications and changes if they fall within the scope of the claims of this utility model and their equivalents. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not indicate that a combination of these measures cannot be used for profit. Any reference numerals in the claims should not be considered as limiting the scope.

Claims

1. A pressure relief connector, characterized in that, include: The connector body has an external connection part and a first cavity and a second cavity that are interconnected inside. The first cavity has a pressure relief channel that connects to the outside. The external connection part is connected to the second cavity. A valve structure includes a valve seat and a valve core. The valve seat is installed in the first cavity, and the valve core is axially movable within the valve seat. One end of the valve core extends out of the second cavity, and a sealing structure is provided on the valve core. An operating mechanism is pivotally connected to the valve seat and works in conjunction with the valve core to drive the valve core to move axially to control the connection or closure of the first cavity and the second cavity.

2. The pressure relief connector according to claim 1, characterized in that, The second cavity is provided with an interface structure for connecting a gas cylinder, and a sealing ring is provided at the interface structure.

3. The pressure relief connector according to claim 1, characterized in that, It is also provided with a limiting mechanism, which includes a limiting pin disposed on the connector body and a limiting groove disposed on the outer wall of the valve seat.

4. The pressure relief connector according to claim 3, characterized in that, The connector body has a pin hole, and the limiting pin is detachably disposed in the pin hole.

5. The pressure relief connector according to claim 1, characterized in that, The valve core is provided with an annular protrusion structure, the outer diameter of which is smaller than the inner diameter of the first cavity, and the sealing structure is located between the annular protrusion structure and the bottom of the first cavity.

6. The pressure relief connector according to claim 1, characterized in that, The pressure relief channel is located on the side wall between the valve seat and the bottom of the first cavity.

7. The pressure relief connector according to claim 1, characterized in that, The operating mechanism is a switch handle.

8. The pressure relief connector according to claim 7, characterized in that, The pivot end of the switch handle is provided with a protrusion, and the two sides of the protrusion have wedge-shaped surfaces.

9. The pressure relief connector according to claim 1, characterized in that, The peripheral connection part is connected to the barometer.

10. The pressure relief connector according to claim 1, characterized in that, The external connection part is connected to the air pipe connector.

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