Gas hose end connecting and sealing structure

Abstract

The utility model provides a gas hose end connecting and sealing structure, and belongs to the technical field of gas conveying equipment. The gas hose end connector solves the problem that an existing gas hose end connector is prone to loosening and leakage occurs. The gas hose end connecting and sealing structure comprises a connector body, a pipe connector, a hose sealing insert and a locking gasket, the connector body is arranged at the end of a gas hose, a connecting cavity is formed in the connector body, the pipe connector is connected with an internal thread of the connecting cavity in a matched mode through an external thread, and the pipe sealing insert is fixed in the connecting cavity and communicated with the interior of the gas hose. When the pipe joint is screwed into the connecting cavity, the hose sealing insert penetrates into the inner wall of the pipe joint, a plurality of sealing rings are arranged between the hose sealing insert and the pipe joint to enhance sealing, a locking folded edge is arranged on the outer edge of the upper end of the locking gasket, and an inclined folded edge is arranged on the inner edge of the locking part. An arc chamfer is arranged on the outer edge of the locking part. The sealing device has the effects of leakage prevention and high sealing performance.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas transmission equipment, and relates to a gas hose, and particularly to a gas hose end connection sealing structure. Background Technology

[0002] Gas hoses are key components that connect gas appliances to combustion appliances. Traditional gas hoses often use single-layer rubber sealing rings or clamps for tightening at the ends. After long-term use, these hoses are prone to gas leakage due to rubber aging and vibration loosening.

[0003] To address the aforementioned issues, various improvements have been made to the end connections of gas hoses. For example, a threaded connection gas hose (application number CN201921877335.6) disclosed in existing patent documents features a sealing element at one end of the connector. The sealing element includes a sealing gasket and a connecting fixing tube, with the sealing gasket located at one end of the connecting fixing tube. The connecting fixing tube is embedded in an embedding hole and connected to the connector via threads. The sealing element has an installation hole, and a fixed connection is achieved through the threaded connection and the sealing element structure to prevent leakage.

[0004] However, in practical applications, this technology still has the following drawbacks: the connecting and fixing pipe and connector at the end of the gas hose must be tightened, and its structure does not have a locking mechanism. The threaded connection may become loose due to external or human factors, and a single sealing gasket cannot achieve a seal, which will still cause the gas to loosen.

[0005] Therefore, there is an urgent need to develop a new connection and sealing structure for use in gas pipe connections. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a sealing structure for the end connection of a gas hose.

[0007] The purpose of this utility model can be achieved through the following technical solution: a gas hose end connection sealing structure, characterized in that it includes a connector body disposed at the end of the gas hose, a pipe connector fixed on the gas appliance, a hose sealing insert located inside the connector body, and a locking gasket for locking.

[0008] The connector body is located at the end of the gas hose and has a connecting cavity inside. The connector is connected to the connecting cavity by an external thread.

[0009] The hose sealing insert is fixed in the connecting cavity and communicates with the inside of the gas hose. Its outer wall and the side wall of the connecting cavity form an annular cavity. The locking gasket is sleeved on the outside of the hose sealing insert.

[0010] The hose sealing insert has a shaft portion that extends radially outward, and its locking gasket abuts against the shaft portion;

[0011] When the pipe fitting is screwed into the connecting cavity, the hose sealing insert passes through the inner wall of the pipe fitting, and multiple sealing rings are provided between the two to enhance the seal. The upper outer edge of the locking gasket is provided with a locking fold, and the inner edge of the locking part extending axially at the lower end of the pipe fitting is provided with an inclined fold. Locking and fixing are achieved by squeezing the locking fold. The outer edge of the locking part is provided with a rounded chamfer for assembly guidance.

[0012] In the above-mentioned gas hose end connection sealing structure, a plurality of sealing rings are sleeved on the outside of the hose sealing insert and embedded in the corresponding positions.

[0013] In the above-mentioned gas hose end connection sealing structure, a plurality of sealing rings are embedded in the corresponding inner wall of the pipe joint.

[0014] In the above-mentioned gas hose end connection sealing structure, the shaft portion of the hose sealing insert is a radially outwardly extending annular stepped boss, the upper surface of which is a plane for contacting the lower end plane of the locking gasket.

[0015] In the above-mentioned gas hose end connection sealing structure, the radius of the arc of the chamfer on the outer edge of the locking part ranges from 0.5mm to 2mm.

[0016] In the above-mentioned gas hose end connection sealing structure, the locking edge of the locking gasket has an inward tilt angle, which matches the tilt angle of the tilted edge of the pipe joint locking part, so that during the tightening process of the pipe joint, the tilted edge can effectively press and deform the locking edge to achieve radial locking.

[0017] Compared to existing technologies, this gas hose end-connection sealing structure utilizes multiple sealing rings, such as O-rings, between the hose sealing insert and the inner wall of the pipe fitting to form multiple reliable radial sealing lines. This effectively prevents axial gas leakage. The locking edge of the locking gasket undergoes plastic deformation when the pipe fitting is tightened, creating a permanent radial clamping and mechanical interlock, providing extremely high anti-loosening capability and significantly improving sealing reliability and pressure resistance. This dual effect greatly reduces the risk of leakage. Attached Figure Description

[0018] Figure 1 This is a partial cross-sectional structural diagram of the first embodiment of the present invention.

[0019] Figure 2 This is a partial cross-sectional structural diagram of the second embodiment of the present invention.

[0020] In the figure, 1. Connector body; 2. Pipe connector; 3. Hose sealing insert; 4. Locking gasket; 5. Connecting cavity; 6. Shaft base; 7. Sealing ring; 8. Locking fold; 9. Inclined fold; 10. Rounded chamfer; 11. Locking part. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 , Figure 2 As shown, this gas hose end connection sealing structure includes a connector body 1 located at the end of the gas hose, a pipe connector 2 fixed to the gas appliance, a hose sealing insert 3 located inside the connector body 1, and a locking washer 4 for locking. The connector body 1 is located at the end of the gas hose and has a connecting cavity 5 inside. The pipe connector 2 is connected to the connecting cavity 5 by an external thread engaging with the internal thread of the connecting cavity 5. The pipe sealing insert is fixed inside the connecting cavity 5 and communicates with the inside of the gas hose. Its outer wall forms an annular cavity with the side wall of the connecting cavity 5. The locking washer 4 is sleeved on the hose sealing insert. Outside the sealing insert 3, the pipe sealing insert extends radially outward with a shaft platform 6, and its locking gasket 4 abuts against the shaft platform 6. When the pipe joint 2 is screwed into the connecting cavity 5, the hose sealing insert 3 penetrates the inner wall of the pipe joint 2. Multiple sealing rings 7 are provided between the two to enhance the seal. The upper outer edge of the locking gasket 4 is provided with a locking flange 8. The inner edge of the locking part 11 extending axially at the lower end of the pipe joint 2 is provided with an inclined flange 9. Locking and fixing are achieved by squeezing the locking flange 8. The outer edge of the locking part 11 is provided with a rounded chamfer 10 for assembly guidance.

[0023] Multiple sealing rings 7 are fitted onto the outside of the hose sealing insert 3 and embedded in the corresponding positions.

[0024] Multiple sealing rings 7 are embedded in the corresponding inner walls of the pipe fitting 2.

[0025] The shaft portion 6 of the hose sealing insert 3 is a radially outwardly extending annular stepped boss with a flat upper surface for contacting the lower end face of the locking gasket 4.

[0026] The radius of the chamfer 10 on the outer edge of the locking part 11 ranges from 0.5 mm to 2 mm.

[0027] The locking edge 8 of the locking washer 4 has an inward tilt angle, which matches the tilt angle of the tilted edge 9 of the locking part 11 of the pipe joint 2, so that during the tightening process of the pipe joint 2, the tilted edge 9 can effectively press and deform the locking edge 8 to achieve radial locking.

[0028] Working principle

[0029] The gas hose end is fitted with the connector body 1, with a hose sealing insert 3 fixed inside. A locking washer 4 is fitted over the hose sealing insert 3 and abuts against the annular stepped boss of the hose sealing insert 3's axial portion 6. The threaded pipe connector 2 on the gas appliance is ready. The pipe connector 2 is aligned with the connecting cavity 5 of the connector body 1, and screwed in through the engagement of the external thread of the pipe connector 2 with the internal thread of the connecting cavity 5. During screwing, the front end of the hose sealing insert 3 gradually penetrates into the inner hole of the pipe connector 2. Multiple sealing rings 7, located on the outside of the hose sealing insert 3 or the inner wall of the pipe connector 2, and their corresponding mating surfaces (the inner wall of the pipe connector 2 or the outer wall of the hose sealing insert 3) are in close contact, forming multiple radial sealing barriers to prevent axial gas leakage. This is the primary static seal. As the pipe connector 2 continues to screw in, its axially extending locking portion 11 begins to contact the locking washer 4. The inner edge of the locking part 11 has an inclined flange 9, and the upper outer edge of the locking gasket 4 has a locking flange 8, both having a matching inward inclined angle. The inclined flange 9 of the locking part 11 forcibly presses against the locking flange 8 of the locking gasket 4. Under strong axial pressure, the locking flange 8 and the locking gasket 4, which are usually made of deformable metal, undergo plastic deformation and are radially squeezed inward. The deformed locking flange 8 tightly hugs the outside of the hose sealing insert 3 or is embedded in its structure, forming a strong radial clamping force.

[0030] Further compact the multiple sealing rings 7 between the hose sealing insert 3 and the inner wall of the pipe joint 2 to improve its sealing effect and pressure resistance.

[0031] The hose sealing insert 3 provides strong radial constraint and transmits the force to the connector body 1 and the hose through the shaft platform 6. At the same time, the mechanical interlocking effect formed by deformation locking, as well as the friction of the threaded connection itself, effectively resist the loosening of the connector caused by gas pressure fluctuations, vibrations, or accidental pulling.

[0032] The rounded chamfer 10 on the outer edge of the locking part 11 of the pipe connector 2 serves as a guide during assembly, helping the locking part 11 to smoothly fit into the locking washer 4 and preventing jamming or damage.

[0033] The annular cavity formed between the outer wall of the hose sealing insert 3 and the side wall of the connecting cavity 5 primarily serves to accommodate the locking gasket 4 and provide space for the locking mechanism to operate. It does not perform the main sealing function itself, but ensures the normal operation of the locking mechanism.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0035] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A sealing structure for the end connection of a gas hose, characterized in that, It includes a connector body (1) located at the end of the gas hose, a pipe connector (2) fixed to the gas appliance, a hose sealing insert (3) located inside the connector body (1), and a locking gasket (4) for locking. The connector body (1) is located at the end of the gas hose and has a connecting cavity (5) inside. The pipe connector (2) is connected to the connecting cavity (5) by external thread through an engagement of external thread and internal thread. The hose sealing insert (3) is fixed inside the connecting cavity (5) and communicates with the inside of the gas hose. Its outer wall forms an annular cavity with the side wall of the connecting cavity (5). The locking gasket (4) is sleeved on the outside of the hose sealing insert (3). The hose sealing insert (3) has a shaft base (6) extending radially outward, and its locking gasket (4) abuts against the shaft base (6); When the pipe connector (2) is screwed into the connecting cavity (5), the hose sealing insert (3) passes through the inner wall of the pipe connector (2). Multiple sealing rings (7) are provided between the two to enhance the seal. The upper outer edge of the locking gasket (4) is provided with a locking flange (8). The inner edge of the locking part (11) extending axially at the lower end of the pipe connector (2) is provided with an inclined flange (9). Locking and fixing are achieved by squeezing the locking flange (8). The outer edge of the locking part (11) is provided with a rounded chamfer (10) for assembly guidance.

2. The gas hose end connection sealing structure according to claim 1, characterized in that, Multiple sealing rings (7) are fitted over the outside of the hose sealing insert (3) and embedded in the corresponding positions.

3. The gas hose end connection sealing structure according to claim 1, characterized in that, Multiple sealing rings (7) are embedded in the corresponding inner wall of the pipe joint (2).

4. The gas hose end connection sealing structure according to claim 1, characterized in that, The shaft portion (6) of the hose sealing insert (3) is a radially outwardly extending annular stepped boss with a flat upper surface for contacting the lower end face of the locking gasket (4).

5. The gas hose end connection sealing structure according to claim 1, characterized in that, The radius of the rounded chamfer (10) on the outer edge of the locking part (11) ranges from 0.5 mm to 2 mm.

6. The gas hose end connection sealing structure according to claim 1, characterized in that, The locking edge (8) of the locking gasket (4) has an inward tilt angle, which matches the tilt angle of the tilt edge (9) of the locking part (11) of the pipe joint (2), so that during the tightening process of the pipe joint (2), the tilt edge (9) can effectively press and deform the locking edge (8) to achieve radial locking.

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