Airtight quick connect fitting for gas masks

Abstract

The utility model belongs to the technical field of joint, relates to sealed connection, concretely is a kind of gas-tightness quick plug joint of gas mask, including lower joint core, joint sleeve, upper joint core, spring, sealing cover, adapter, and the upper joint core lower end is connected between the upper end of lower joint core by thread, and upper joint core middle part is equipped with upper clamping position ring convex, and lower joint core middle part is equipped with lower clamping position ring convex, joint sleeve is assembled in the connecting place of upper joint core and lower joint core, spring is located between upper end surface inner ring convex and lower clamping position ring convex, and it is in compression state under normal state, and sealing cover is installed outside lower interface of lower joint core, and the upper end of adapter is sealedly installed between sealing cover and joint sleeve lower end.The utility model design is reasonable, and spring and sealing cover are used ingeniously, the gas-tightness of joint is guaranteed, and the overall structural design of design structure and adapter cooperation realizes easy plug and unplug, with good practical application value.

Description

Technical Field

[0001] This utility model belongs to the field of connector technology and relates to sealed connections, specifically an airtight quick-connect connector for gas masks. Background Technology

[0002] As a key component connecting the gas mask body to the filtering and air supply devices, the airtight quick-connect fitting plays a decisive role in the overall protective function of the gas mask. To achieve its protective function, a gas mask typically needs to connect the air passages of its various functional components to the air passages of the mask body, while also ensuring an airtight seal.

[0003] Currently, most gas masks in China use rubber tubing sets for their air circuits, with fixing devices used at the joints to ensure airtightness. This connection method is time-consuming and laborious to install and disassemble, extremely inconvenient to use, and the durability of the airtightness cannot be guaranteed.

[0004] In terms of manufacturing process, the sealing structure with good sealing performance and the convenient connection mechanical structure require extremely high processing precision. Existing manufacturing technology has certain defects, which can easily lead to uneven sealing surfaces, excessive connection gaps, etc., affecting the airtightness of the joint and the reliability of the connection. Summary of the Invention

[0005] The purpose of this invention is to design an airtight quick-connector for gas masks to solve the problems of sealing and disassembly difficulties in existing connection methods, and to achieve functions such as simple and quick plugging and unplugging, convenient use, and good airtightness.

[0006] This utility model is achieved using the following technical solution:

[0007] An airtight quick-connector for gas masks includes a lower connector core, a connector sleeve, an upper connector core, a sealing ring, a spring, a sealing sleeve, and an adapter.

[0008] The lower end of the upper connector core and the upper end of the lower connector core are connected by threads; the upper connector core has an upper locking ring protrusion in the middle, and the lower connector core has a lower locking ring protrusion in the middle; the connector sleeve is assembled at the connection between the upper connector core and the lower connector core, that is, the lower locking ring protrusion of the lower connector core is located inside the connector sleeve, the inner ring protrusion of the upper end face of the connector sleeve is located below the upper locking ring protrusion of the upper connector core, the spring is located between the inner ring protrusion of the upper end face and the lower locking ring protrusion, and is normally in a compressed state; a sealing sleeve is installed on the lower interface of the lower connector core, and the upper port of the adapter is sealed between the sealing sleeve and the lower port of the connector sleeve.

[0009] A further preferred embodiment has a sealing ring at the threaded connection between the lower end of the upper connector core and the upper end of the lower connector core.

[0010] More preferably, the upper interface of the upper connector core is connected to a rubber tube air passage; the lower port of the adapter is connected to another rubber tube air passage.

[0011] More preferably, the lower part of the connector sleeve is symmetrically provided with a rotating groove; the upper outer side of the adapter is symmetrically provided with a positioning protrusion corresponding to the rotating groove; the positioning protrusion enters through the slot of the rotating groove and rotates to be located in the inner groove of the rotating groove.

[0012] When using this utility model, first place the spring into the connector sleeve, then put the sealing sleeve on the lower interface of the lower connector core, and then push the lower connector core into the connector sleeve. At this time, the spring is located between the lower locking ring protrusion of the lower connector core and the inner ring protrusion of the upper end face of the connector sleeve, and between the upper outer wall of the lower connector core and the inner wall of the connector sleeve.

[0013] Next, the adapter is installed. The two locating protrusions on the upper part of the adapter enter through the slot of the rotary groove and move upwards to their maximum stroke. During this process, the upper surface of the adapter abuts against the bottom surface of the lower locking ring protrusion of the lower connector core and further drives the lower connector core upwards, continuously compressing the spring until the maximum stroke is reached (i.e., the locating protrusion reaches the upper end of the slot of the rotary groove). Then, after rotating the adapter, the lower locking ring protrusion drives the rotating head downwards a certain distance under the action of the spring, simultaneously causing the locating protrusion to move downwards and enter the inner groove of the rotary groove (at this time, the spring is still in a compressed state), completing the assembly of the adapter onto the connector sleeve. That is, the upper end of the adapter is sealed between the sealing sleeve and the lower end of the connector sleeve. Finally, the sealing ring is placed on the lower external thread of the upper connector core, and the lower part of the lower connector core is inserted from the upper port of the connector sleeve. The upper connector core is then screwed on, connecting the lower external thread of the upper connector core with the upper internal thread of the lower connector core, until the upper locking ring protrusion of the upper connector core contacts the inner ring protrusion on the upper end face of the connector sleeve. The assembly of the entire airtight quick-connect fitting is now complete. Disassembly is performed by reversing the steps.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This utility model can form the main body of the gas passage by connecting and combining the upper connector core, the lower connector core, and the connector sleeve, thereby ensuring the flow of gas.

[0016] 2. This utility model can fill the gap at the threaded connection by using a sealing ring, thereby avoiding the problem of air leakage in small gaps.

[0017] 3. This utility model can ensure a tight fit between the sealing sleeve and the adapter by using the clamping force provided by the spring; thus solving the problem of unstable airtightness of existing airtight joints.

[0018] 4. This utility model can be quickly connected and disassembled by pressing and rotating the adapter into the rotating slot of the connector sleeve, thereby solving the problem of time-consuming and laborious installation and disassembly of existing airtight connectors.

[0019] This utility model is reasonably designed, cleverly using springs and sealing sleeves to ensure the airtightness of the connector. The design structure, in conjunction with the adapter, achieves an overall structure design that facilitates plugging and unplugging, and has great practical application value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an airtight quick-connect fitting.

[0021] Figure 2 This is a schematic diagram of the upper connector core.

[0022] Figure 3 This is a schematic diagram of the connector sleeve.

[0023] Figure 4 This is a schematic diagram of the lower connector core.

[0024] Figure 5 This is a schematic diagram of an adapter.

[0025] In the diagram: 1-lower connector core, 2-connector sleeve, 3-upper connector core, 4-sealing ring, 5-spring, 6-sealing sleeve, 7-adapter, 8-rotating groove, 9-positioning protrusion, 101-lower locking ring protrusion, 102-lower interface, 201-upper end face inner ring protrusion, 301-upper locking ring protrusion, 302-upper interface. Detailed Implementation

[0026] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] A gas mask airtight quick-connect connector, such as Figure 1 As shown, it includes a lower connector core 1, a connector sleeve 2, an upper connector core 3, a sealing ring 4, a spring 5, a sealing sleeve 6, an adapter 7, etc.

[0028] like Figure 1 As shown, the lower end of the upper connector core 3 is connected to the upper end of the lower connector core 1 by a thread, as follows: Figure 2 As shown, the upper connector core 3 has an upper locking ring protrusion 301 in the middle and an external thread at the bottom. After the sealing ring 4 is assembled, it connects to the lower connector core 1. The upper part serves as the upper interface 302, which connects to the air passage of the rubber hose. Figure 4As shown, the lower connector core 1 has a lower locking ring protrusion 101 in the middle, and an internal thread on the upper part to connect with the upper connector core 3. The lower part serves as the lower interface 102 for installing the sealing sleeve 6. The connector sleeve 2 is assembled at the connection between the upper connector core 3 and the lower connector core 1. That is, the lower locking ring protrusion 101 of the lower connector core 1 is located inside the connector sleeve 2, and the inner ring protrusion 201 on the upper end face of the connector sleeve 2 is located below the upper locking ring protrusion 301 of the upper connector core 3. The spring 5 is located between the inner ring protrusion 201 on the upper end face and the lower locking ring protrusion 101, and is normally in a compressed state. The sealing sleeve 6 is installed on the lower interface 102 of the lower connector core 1, and the upper end of the adapter 7 is sealed between the sealing sleeve 6 and the lower end of the connector sleeve 2.

[0029] like Figure 3 As shown, the lower part of the connector sleeve 2 is symmetrically provided with rotating grooves 8, which are hook-shaped (i.e., composed of a slot and an inner groove); as Figure 5 As shown, the upper outer side of the adapter 7 is symmetrically provided with positioning protrusions 9 corresponding to the rotating slot 8; the positioning protrusions 9 enter through the slot of the rotating slot 8 and are located in the inner groove of the rotating slot 8 after rotation.

[0030] During assembly, first, spring 5 is placed inside connector sleeve 2. Then, sealing sleeve 6 is placed on the lower interface 102 of lower connector core 1. Then, lower connector core 1 is pushed into connector sleeve 2. At this time, spring 5 is located vertically between the lower locking ring protrusion 102 of lower connector core 1 and the inner ring protrusion 201 of the upper end face of connector sleeve 2, and horizontally between the upper outer wall of lower connector core 1 and the inner wall of connector sleeve 2.

[0031] Next, the adapter 7 is installed. The two positioning protrusions 9 on the upper part of the adapter 7 enter through the slot of the rotating slot 8 and move upward to the maximum stroke. During this process, the upper end face of the adapter 7 abuts against the bottom surface of the lower locking ring protrusion 101 of the lower connector core 1 and further drives the lower connector core 1 to move upward, continuously compressing the spring 5 until the maximum stroke is reached (that is, the positioning protrusions 9 reach the upper end of the slot of the rotating slot 8). Then, after rotating the adapter 7, under the action of the spring 5, the lower locking ring protrusion 202 drives the rotating head 7 to move down a certain distance, and at the same time, the positioning protrusions 9 move down and enter the inner groove of the rotating slot 8 (at this time, the spring 5 is still in a compressed state), thus completing the assembly of the adapter 7 onto the connector sleeve 2. That is, the upper end of the adapter 7 is sealed between the sealing sleeve 6 and the lower end of the connector sleeve 2. Finally, place the sealing ring 4 onto the lower external thread of the upper connector core 3, insert the lower part of the lower connector core 3 into the upper port of the connector sleeve 2, and screw on the upper connector core 3 to connect the lower external thread of the upper connector core 3 with the upper internal thread of the lower connector core 1, until the upper locking ring protrusion 301 of the upper connector core 3 contacts the inner ring protrusion 201 on the upper end face of the connector sleeve 2. This completes the assembly of the entire airtight quick-connect connector. Disassembly is performed by reversing the steps.

[0032] During operation, the upper interface 302 of the upper connector core 3 is connected to a rubber tube air passage, and the lower port of the adapter 7 is connected to another rubber tube air passage, thus realizing the pipeline connection.

[0033] When disconnecting the air circuit, first press the adapter 7 upwards, causing the positioning protrusion 9 on the adapter 7 to move upwards. During this process, the lower connector core 1 and the upper connector core 3 will also move upwards as a whole (at this time, the upper locking ring protrusion 301 separates from the inner ring protrusion 201 on the upper end face), compressing the spring 5. The adapter 7 rotates in the opposite direction to position the positioning protrusion 9 in the slot of the rotating groove 8. Then, pull the adapter 7 downwards. Under the action of the spring 5, the lower connector core 1 and the upper connector core 3 will move downwards and reset as a whole (the upper locking ring protrusion 301 re-contacts the inner ring protrusion 201 on the upper end face). When reconnecting the air circuit, insert the upper end of the adapter 7 into the lower end of the connector sleeve 2, so that the positioning protrusion 9 enters from the slot of the rotating groove 8 and rotates to be located in the inner groove of the rotating groove 8, completing the connection between the adapter 7 and the connector sleeve 2.

[0034] The airtight quick-connect connector described in this utility model, while ensuring better airtightness, has a simpler structure and is easier and faster to assemble and disassemble compared to existing airtight quick-connect connectors. It achieves reliable and rapid insertion and removal, which has a positive effect on the development of gas mask technology, saves manpower and material resources, and ensures user safety.

[0035] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A quick-connect airtight connector for a gas mask, characterized in that: Includes lower connector core (1), connector sleeve (2), upper connector core (3), spring (5), sealing sleeve (6), and adapter (7); The lower end of the upper connector core (3) is connected to the upper end of the lower connector core (1) by a thread; The upper connector core (3) is provided with an upper locking ring protrusion (301) in the middle, and the lower connector core (1) is provided with a lower locking ring protrusion (101) in the middle. The connector sleeve (2) is assembled at the connection between the upper connector core (3) and the lower connector core (1), that is, the lower locking ring protrusion (101) of the lower connector core (1) is located inside the connector sleeve (2), the upper end face inner ring protrusion (201) of the connector sleeve (2) is located below the upper locking ring protrusion (301) of the upper connector core (3), and the spring (5) is located between the upper end face inner ring protrusion (201) and the lower locking ring protrusion (101) and is normally in a compressed state; A sealing sleeve (6) is installed on the lower interface (102) of the lower connector core (1), and the upper end of the adapter (7) is sealed between the sealing sleeve (6) and the lower end of the connector sleeve (2).

2. The gas mask airtight quick-connect connector according to claim 1, characterized in that: A sealing ring (4) is provided at the threaded connection between the lower end of the upper connector core (3) and the upper end of the lower connector core (1).

3. The gas mask airtight quick-connect connector according to claim 1 or 2, characterized in that: The upper interface (302) of the upper connector core (3) is connected to a rubber tube air passage; the lower port of the adapter (7) is connected to another rubber tube air passage.

4. The gas mask airtight quick-connect connector according to claim 3, characterized in that: The lower part of the connector sleeve (2) is symmetrically provided with a rotating groove (8); the upper outer side of the adapter (7) is symmetrically provided with a positioning protrusion (9) corresponding to the rotating groove (8); the positioning protrusion (9) enters through the slot of the rotating groove (8) and rotates to be located in the inner groove of the rotating groove (8).

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