Gas metal hose against impact and falling off

Abstract

The application discloses a gas metal hose capable of preventing impact and falling, and relates to the field of gas metal hoses.The gas metal hose comprises a screw cap, the screw cap is sleeved on both ends of a corrugated pipe, first convex ring parts are arranged on the corrugated pipe at intervals along the length direction, a snap ring is clamped at one of the first convex ring parts in the screw cap, a supporting structure for supporting the inner wall of the first convex ring part is arranged on the inner wall of the corrugated pipe at the position corresponding to the snap ring, and the first convex ring part of the end part of the corrugated pipe is clamped between the snap ring and the supporting structure.A clamping structure is arranged on the inner wall of the convex ring part of the metal corrugated pipe corresponding to the snap ring, so that the inner wall and the outer wall of the convex ring part of the metal corrugated pipe at the position can be supported, the metal corrugated pipe is not prone to deformation when the joint is impacted or pulled, the stability of the joint of the gas metal hose is improved compared with the prior art, and the problem that the joint is prone to falling when impacted is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas metal hose, in particular to a gas metal hose capable of preventing impact and falling off. BACKGROUND

[0002] The gas metal hose is a flexible pipe element for gas delivery system, mainly composed of three parts of stainless steel bellows, metal mesh sleeve and connector, which absorbs vibration and compensates displacement through the flexible design of the bellows, and adapts to complex installation environment, and is a key component to ensure gas safety.

[0003] The connector of the gas metal hose in the prior art is generally matched with the protrusions on the outer wall of the bellows through two clamping rings capable of clamping in opposite directions, and a gasket and a rubber plug are sequentially arranged in the direction of the clamping ring towards the pipe opening. When the nut is tightened, the clamping ring is pushed and the rubber plug is pressed tightly at the interface of the gas equipment or the gas pipeline to be connected, so as to realize the connection of the gas metal hose.

[0004] However, in actual use, the joint of the gas metal hose may be impacted in various use scenarios. These impact risks are mainly related to installation position, operation behavior and environmental factors. For example, when the joint is located in the closed cabinet under the cooking bench, the user may impact the joint with a hard object (such as the bottom of the pot, heavy objects) when taking and placing pots, dishes or cleaning supplies, or the joint may be scratched by tools such as vacuum cleaners and brushes when cleaning the cabinet, or the joint is easily dragged by the base of the gas stove or impacted by the wall when moving the gas stove (such as deep cleaning or adjusting position). When the gas joint is impacted or the hose is pulled, the joint may be loose, which may cause the risk of gas leakage.

[0005] In view of the above related technology, the gas metal hose in the prior art contacts the annular protrusions of the metal bellows through the clamping ring. Since the wall of the metal bellows is thin, the annular protrusions of the metal bellows in contact with the clamping ring are prone to deformation when the joint of the gas hose is frequently impacted or pulled. The stability of the connection between the deformed bellows and the clamping ring is reduced, and the joint of the hose is prone to falling off when impacted again. In summary, the joint of the existing gas metal hose is prone to falling off due to impact. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a gas metal hose capable of preventing impact and falling off, so as to solve the technical problem that the joint of the existing gas metal hose is prone to falling off due to impact.

[0007] To achieve the above object, the present application provides the following technical scheme: A gas metal hose against impact and falling, comprising a nut, the nut is sleeved on both ends of a corrugated pipe, the corrugated pipe is provided with a first convex ring part at intervals along the length direction, a snap ring is clamped at one of the first convex ring parts in the nut, and a supporting structure for supporting the inner wall of the first convex ring part is arranged on the inner wall of the corrugated pipe at the position corresponding to the snap ring, and the first convex ring part of the end of the corrugated pipe is clamped between the snap ring and the supporting structure.

[0008] By adopting the above technical scheme, the clamping structure is arranged on the inner wall of the convex ring part of the metal corrugated pipe corresponding to the snap ring, so that the inner wall and the outer wall of the convex ring part of the metal corrugated pipe at the position can be supported, and then the metal corrugated pipe is not easy to deform when the joint is impacted or pulled, the stability of the gas metal hose joint is improved compared with the prior art, and then the problem that the joint is fallen when impacted is effectively avoided.

[0009] The present application is further provided that the corrugated pipe is clamped with a clamping ring, the clamping ring is slidably connected with a convex column capable of being inserted into the inner wall of the first convex ring part in the radial direction, and the convex column is annularly and interval ly distributed on the clamping ring.

[0010] As preferred, the inner wall of the first convex ring part is contacted by the convex column on the clamping ring, and the deformation of the first convex ring part of the corrugated pipe is limited by the cooperation of the snap ring, so that the joint is prevented from falling when impacted.

[0011] The present application is further provided that the corrugated pipe is clamped with a clamping piece, and the outer wall of the clamping piece is fixedly connected with a second convex ring part capable of being clamped into the inner wall of the first convex ring part.

[0012] As preferred, the second convex ring part can more fully contact the inner wall of the first convex ring part.

[0013] The present application is further provided that the corrugated pipe is inserted with a positioning ring for positioning the clamping ring or the clamping piece, one end of the positioning ring towards the clamping ring or the clamping piece is provided with an inclined chamfer, and the clamping ring or the clamping piece towards the positioning ring is also provided with a matching inclined chamfer.

[0014] As preferred, the positioning of the clamping ring and the clamping piece in the corrugated pipe is facilitated, and the clamping ring or the clamping piece is prevented from shaking in the corrugated pipe.

[0015] The present application is further provided that the outer wall of the clamping ring is annularly and interval ly provided with a positioning piece, and the positioning piece can limit the movement of the clamping ring towards the pipe opening direction of the corrugated pipe.

[0016] As preferred, the positioning piece can facilitate the quick movement of the clamping ring to the target first convex ring part during the installation of the clamping ring.

[0017] The application is further provided with three clamping pieces, which can form a ring structure in the bellows.

[0018] Preferably, the clamping pieces forming the ring structure can fill the inner wall of the target first convex ring part.

[0019] The application is further provided with a concave ring part in the inner wall of the clamping ring for clamping the first convex ring part, and a socket part is arranged in the clamping ring along the direction parallel to the axis of the bellows, the socket part partially overlaps the concave ring part, and a plug is slidably connected in the socket part.

[0020] Preferably, during the gradual tightening of the nut, the nut pushes the plug into the socket part, further compressing the first convex ring part.

[0021] The application is further provided with an inclined chamfer at the end of the plug away from the nut.

[0022] Preferably, the plug is gradually inserted into the socket part.

[0023] The application is further provided with a clamping ring, a gasket and a rubber plug arranged in the nut in sequence towards the direction of the bellows opening, and the other end of the positioning ring is in contact with the rubber plug after the clamping ring or clamping piece is positioned by contacting one end of the positioning ring.

[0024] Preferably, the rubber plug can limit the movement of the positioning ring, thereby avoiding the movement of the clamping ring or clamping piece after the connection of the gas metal hose.

[0025] The application is further provided with the same inner diameter of the positioning ring and the rubber plug, and the outer diameter is equal to the inner diameter of the bellows.

[0026] Preferably, the positioning ring avoids interfering with the normal flow of the medium in the gas metal hose.

[0027] In summary, the application mainly has the following beneficial effects:

[0028] The application sets the clamping structure in the inner wall of the corresponding metal bellows convex ring part of the clamping ring, so that the inner wall and the outer wall of the metal bellows convex ring at this position can be supported, thereby preventing the metal bellows from deforming when the joint is impacted or pulled, improving the stability of the gas metal hose joint compared to the prior art, and effectively preventing the joint from falling off when impacted.

[0029] This invention provides a snap-fit ​​ring on the inner wall of a metal corrugated hose and a protruding post that slides radially along the snap-fit ​​ring for insertion into the convex ring portion of the metal corrugated hose. Before assembling the rubber stopper, the protruding post is pushed into the convex ring portion of the metal corrugated hose by utilizing the interlocking of the inclined surfaces between the positioning ring and the snap-fit ​​ring. This allows the protruding post and the concave ring portion of the snap-fit ​​ring to contact the convex ring portion of the metal corrugated hose, effectively preventing deformation of the metal corrugated hose at the snap-fit ​​ring. This improves the protective performance of the gas metal hose joint and prevents the joint from detaching due to impact.

[0030] This invention inserts multiple snap-fit ​​pieces into a metal corrugated hose. The convex ring portion on the outer wall of the snap-fit ​​piece contacts the inner wall of the convex ring portion of the metal corrugated hose, thus achieving ring-shaped support on the inner wall of the metal corrugated hose corresponding to the snap-fit ​​piece. This further prevents the joint of the gas metal hose from falling off due to impact.

[0031] This invention utilizes a sliding insert structure with the retaining ring facing the nut. When the nut is tightened, the force applied towards the retaining ring pushes the insert into the insertion hole. During the insertion process, the outer wall of the insert radially compresses the outer wall of the metal bellows, pressing the metal bellows against the convex ring on the corresponding snap-fit ​​piece. This eliminates any gaps that may exist between the convex ring of the metal bellows and the convex ring of the snap-fit ​​piece, further preventing the gas metal hose connector from detaching due to impact. Attached Figure Description

[0032] Figure 1 This is a perspective view of the present invention;

[0033] Figure 2 This is a schematic diagram of the cross-section of the interface of a prior art gas metal flexible hose.

[0034] Figure 3 For existing technology Figure 2 Enlarged view of A in the middle;

[0035] Figure 4 Exploded view of the interface of a gas metal hose in existing technology;

[0036] Figure 5 This is a cross-sectional view of the interface in the first embodiment of the present invention;

[0037] Figure 6 For the present invention Figure 5 Enlarged view of B in the middle;

[0038] Figure 7 This is an exploded view of the interface of the first embodiment of the present invention;

[0039] Figure 8 This is an exploded view of the interface of the first embodiment from another perspective of the present invention;

[0040] Figure 9 Cross-sectional view of the interface for the second embodiment of the application;

[0041] Figure 10 Cross-sectional view of the interface for the second embodiment of the application; Figure 9 Enlarged view of C;

[0042] Figure 11 Cross-sectional view of the interface for the second embodiment of the application;

[0043] Figure 12 Cross-sectional view of the interface for the third embodiment of the application;

[0044] Figure 13 Cross-sectional view of the interface for the third embodiment of the application in the unscrewed state of the screw cap;

[0045] Figure 14 Cross-sectional view of the interface for the third embodiment of the application; Figure 13 Enlarged view of D.

[0046] BRIEF DESCRIPTION OF DRAWINGS

[0047] 1, screw cap; 2, cladding layer; 3, corrugated tube; 301, first protruding ring part; 4, snap ring; 401, concave ring part; 402, insertion hole part; 403, insertion post; 5, gasket; 6, rubber plug; 7, clamping ring; 701, positioning sheet; 702, protruding post; 8, clamping sheet; 801, second protruding ring part; 9, positioning ring. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. The embodiments described below with reference to the drawings are exemplary and are only used to explain the application, and cannot be understood as a limitation of the application.

[0049] The embodiments of the application will be described below according to the overall structure of the application.

[0050] First embodiment:

[0051] A gas metal hose that prevents impact and falling, please refer to Figures 1-8 The application provides the following technical solutions, including a screw cap 1, the screw cap 1 is sleeved on both ends of a corrugated tube 3, the corrugated tube 3 is provided with a first protruding ring part 301 at intervals along the length direction, the outer wall of the corrugated tube 3 is covered with a cladding layer 2 with flame-retardant performance, specifically, the first protruding ring part 301 is a corrugation protruding on the surface of the corrugated tube 3, a snap ring 4 is clamped at one of the first protruding ring parts 301 in the screw cap 1, specifically, the snap ring 4 in the screw cap 1 is two in total, the two half-ring snap rings 4 are spliced into a complete ring, and the split structure is beneficial to convenient sleeving of the snap ring 4 at the target first protruding ring part 301 of the corrugated tube 3.

[0052] Further, the inner wall of the bellows 3 is provided with a support structure at the position corresponding to the snap ring 4 for supporting the inner wall of the first convex ring part 301, and in this embodiment, the support structure is specifically a combination of the clamping ring 7 and the convex column 702. The first convex ring part 301 of the end of the bellows 3 is clamped between the snap ring 4 and the support structure.

[0053] In the above embodiment, specifically referring to Figures 5-8 , the clamping ring 7 is clamped in the bellows 3, and the convex column 702 capable of being inserted into the inner wall of the first convex ring part 301 is connected to the clamping ring 7 in a radial sliding manner. The convex columns 702 are annularly and spacedly distributed on the clamping ring 7, and specifically, the outer diameter of the clamping ring 7 is equal to the inner diameter of the bellows 3. In this embodiment, the convex columns 702 are specifically provided with four, and are arranged at an angle of ninety degrees from each other.

[0054] Specifically, after the clamping ring 7 is put into the bellows 3 and the convex columns 702 are aligned with the target first convex ring part 301, the convex columns 702 are pushed to slide towards the inner wall of the first convex ring part 301 until they are inserted into the inner wall of the first convex ring part 301, and together with the concave ring part 401 of the snap ring 4, they limit the relative sliding between the bellows 3 and the snap ring 4. Specifically, the convex columns 702 on the clamping ring 7 contact the inner wall of the first convex ring part 301, and together with the snap ring 4, they limit the deformation of the first convex ring part 301 of the bellows 3, thereby avoiding the joint from falling off due to impact.

[0055] In the above embodiment, specifically referring to Figures 5-8 , the positioning ring 9 for positioning the clamping ring 7 is inserted into the bellows 3, and one end of the positioning ring 9 towards the clamping ring 7 is provided with an inclined chamfer, and the clamping ring 7 towards the positioning ring 9 is also provided with a matching inclined chamfer, which is beneficial for the positioning of the clamping ring 7 in the bellows 3 and avoids the clamping ring 7 from shaking in the bellows 3. Specifically, after the clamping ring 7 is put into the bellows 3, the positioning ring 9 inserted afterwards can push the convex columns 702 to slide towards the inner wall of the first convex ring part 301 during the insertion process by means of the inclined chamfers matched with the clamping ring 7, and thus the clamping ring 7 is clamped in place while the positioning ring 9 is inserted in place.

[0056] Further, the outer wall of the clamping ring 7 is annularly spaced apart with a positioning sheet 701, which can limit the movement of the clamping ring 7 towards the pipe opening of the corrugated pipe 3. Specifically, the positioning sheet 701 has elasticity and is curved towards the pipe opening end of the corrugated pipe 3, which can be deformed under pressure during the process of placing the clamping ring 7 into the corrugated pipe 3, and can limit the sliding of the clamping ring 7 when it wants to move away from the corrugated pipe 3 in the opposite direction. During the process of pushing the clamping ring 7 into the corrugated pipe 3, the positioning sheet 701 contacts the inner wall of the corrugated pipe 3 and is compressed and deformed, and when the positioning sheet 701 moves to the corresponding position of the first protruding ring part 301, it releases the elastic force and restores. The positioning sheet 701 can facilitate the rapid movement of the clamping ring 7 to the target first protruding ring part 301 during the installation process of the clamping ring 7.

[0057] Second embodiment:

[0058] A kind of gas metal flexible pipe that prevents collision and falls off, please refer to Figures 1-4 、 Figures 8-11 On the basis of the first embodiment, which is different from the first embodiment, the clamping sheet 8 is clamped in the corrugated pipe 3, and the outer wall of the clamping sheet 8 is fixedly connected with the second protruding ring part 801 capable of being clamped into the inner wall of the first protruding ring part 301. The second protruding ring part 801 can more fully contact the inner wall of the first protruding ring part 301. Specifically, in this embodiment, there are three clamping sheets 8, which can form an annular structure in the corrugated pipe 3. The clamping sheet 8 forming the annular structure can make the second protruding ring part 801 fill the inner wall of the target first protruding ring part 301. The three-piece clamping sheet 8 can be easily placed into the corrugated pipe 3, and the process of connecting the corrugated pipe 3 joint will not become too complicated.

[0059] In the above embodiment, specifically, please refer to Figures 8-11 , the positioning ring 9 for positioning the clamping sheet 8 is inserted into the corrugated pipe 3. The end of the positioning ring 9 towards the clamping sheet 8 is provided with a bevel, and the clamping sheet 8 towards the positioning ring 9 is also provided with a matching bevel, which is beneficial to the positioning of the clamping sheet 8 in the corrugated pipe 3, avoiding the shaking of the clamping sheet 8 in the corrugated pipe 3. Specifically, when the bevel of the positioning ring 9 and the bevel of the clamping sheet 8 contact each other, it can ensure that the clamping sheet 8 always maintains an annular structure, avoiding the clamping sheet 8 from being scattered due to the pulling of the corrugated pipe 3. The second protruding ring part 801 of the clamping sheet 8 plays a supporting role for the inner wall of the first protruding ring part 301, and the positioning ring 9 can support the clamping sheet 8 in the annular structure.

[0060] Specifically, the screw cap 1 is provided with a snap ring 4, a gasket 5 and a rubber plug 6 in sequence from the direction of the pipe opening of the corrugated pipe 3, wherein the gasket 5 protects the rubber plug 6 from directly contacting the snap ring 4 and uniformly disperses the force transmitted from the snap ring 4 to the rubber plug 6, thereby avoiding irregular deformation of the rubber plug 6. After the clamping piece 8 is positioned by contacting one end of the positioning ring 9, the other end of the positioning ring 9 contacts the rubber plug 6.

[0061] Further, when the rubber plug 6 is compressed, the elastic force generated by the deformation of the rubber plug 6 is applied to the positioning ring 9 and transmitted to the clamping piece 8 through the positioning ring 9, so that the positioning ring 9 can be in close contact with the clamping piece 8 more stably, and the rubber plug 6 can limit the movement of the positioning ring 9, thereby avoiding the movement of the clamping piece 8 after the connection of the gas metal hose.

[0062] Further, the inner diameter of the positioning ring 9 is the same as that of the rubber plug 6, and the outer diameter is equal to the inner diameter of the corrugated pipe 3. After the connection of the gas metal hose is completed, the positioning ring 9 can effectively avoid interfering with the normal flow of the medium in the gas metal hose during the flow of the gas.

[0063] The third embodiment:

[0064] A gas metal hose capable of preventing impact and falling off, please refer to Fig Figures 1-4 、 Figures 12-14 On the basis of the second embodiment, the difference between the second embodiment is that the inner wall of the snap ring 4 is provided with a concave ring part 401 for clamping the first convex ring part 301, and the snap ring 4 is provided with a insertion hole part 402 along the direction parallel to the axis of the corrugated pipe 3, the insertion hole part 402 partially overlaps with the concave ring part 401, specifically, the projection of the insertion hole part 402 along its own axis direction partially overlaps with the projection of the concave ring part 401 along the axis direction of the insertion hole part 402, and the insertion hole part 402 is slidably connected with an insertion column 403. During the process of gradually tightening the screw cap 1, the screw cap 1 pushes the insertion column 403 into the insertion hole part 402, and further compresses the first convex ring part 301.

[0065] Specifically, in the installation of the end joint of the gas metal hose, the covering layer 2 at both ends of the corrugated pipe 3 is first removed, and then the nut 1 is sleeved on the end of the corrugated pipe 3, and then the snap ring 4 is clamped, and then the plug posts 403 are inserted into the corresponding plug hole parts 402 one by one, and then the plurality of clamping pieces 8 are placed into the corrugated pipe 3, and the second convex ring part 801 on the surface of the clamping piece 8 is aligned with the inner wall of the corresponding first convex ring part 301, and then the gasket is sleeved and the positioning ring 9 is inserted, and finally the rubber plug 6 is sleeved, and then the nut 1 is pushed towards the snap ring 4, and the front end of the plug post 403 is slid into the plug hole part 402, and during the threaded connection of the nut 1, the plug post 403 is further inserted into the plug hole part 402, and the plug post 403 can deform the first convex ring part 301 during insertion, and the deformed first convex ring part 301 is compressed on the second convex ring part 801, effectively reducing the possibility of deformation of the corrugated pipe 3 under external force, making the joint connection of the gas metal hose more stable, and avoiding the impact of falling

[0066] Further, the end of the plug post 403 away from the nut 1 is provided with an inclined chamfer, which facilitates the gradual insertion of the plug post 403 into the plug hole part 402.

[0067] The application in specific use:

[0068] The nut 1 is threaded to the gas equipment or gas pipeline, and the nut 1 pushes the snap ring 4 to move towards the rubber plug 6 during the threaded connection, and the rubber plug 6 deforms after being compressed, and the elastic force of the rubber plug 6 is transmitted to the positioning ring 9, so that the positioning ring 9 is in close contact with the clamping ring 7 or the clamping piece 8, at this time, the concave ring part 401 of the snap ring 4 is in close contact with the outer wall of the first convex ring part 301, and the convex column 702 or the second convex ring part 801 is in close contact with the inner wall of the corresponding first convex ring part 301.

[0069] When the joint of the gas metal hose is impacted or the gas metal hose is pulled, the first convex ring part 301 of the corrugated pipe 3 corresponding to the snap ring 4 is limited between the concave ring part 401 and the supporting structure, and at this time, the first convex ring part 301 is difficult to deform, compared with the prior art, it is more difficult to slide between the corrugated pipe 3 and the snap ring 4 under the same impact, thereby effectively avoiding the loosening phenomenon between the corrugated pipe 3 and the joint.

[0070] Although embodiments of the application have been shown and described, the specific embodiments are merely illustrative of the application and are not intended to limit the application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, but as long as it is within the scope of the claims of the application, it is protected by the patent law.

Claims

1. A gas metal hose against impact and falling off, comprising a screw cap (1), the screw cap (1) is sleeved on both ends of a corrugated pipe (3), the corrugated pipe (3) is provided with a first convex ring part (301) at intervals along the length direction, a snap ring (4) is clamped at one of the first convex ring parts (301) in the screw cap (1), characterized in that: The inner wall of the bellows (3) is provided with a support structure for supporting the inner wall of the first convex ring part (301) at the position corresponding to the clamping ring (4), the first convex ring part (301) of the end of the bellows (3) is clamped between the clamping ring (4) and the support structure, the clamping ring (7) is clamped in the bellows (3), the clamping ring (7) is slidingly connected with a convex column (702) capable of being inserted into the inner wall of the first convex ring part (301) in the radial direction, the convex columns (702) are annularly and spacedly distributed on the clamping ring (7), the positioning ring (9) for positioning the clamping ring (7) is inserted into the bellows (3), one end of the positioning ring (9) towards the clamping ring (7) is provided with an inclined chamfer, the clamping ring (7) towards the positioning ring (9) is also provided with a matching inclined chamfer, and the outer wall of the clamping ring (7) is annularly and spacedly provided with a positioning sheet (701), which can limit the movement of the clamping ring (7) towards the direction of the bellows (3).

2. A gas metal flexible hose to prevent impact dislodgement according to claim 1 characterised in that: The clamping piece (8) is clamped in the bellows (3), and the outer wall of the clamping piece (8) is fixedly connected with a second convex ring part (801) capable of being clamped into the inner wall of the first convex ring part (301).

3. A gas metal flexible hose to prevent impact dislodgement according to claim 2, characterised in that: The positioning ring (9) for positioning the clamping piece (8) is inserted into the bellows (3), and one end of the positioning ring (9) towards the clamping piece (8) is provided with an inclined chamfer, and the clamping piece (8) towards the positioning ring (9) is also provided with a matching inclined chamfer.

4. A gas metal flexible hose to prevent impact dislodgement according to claim 2, characterised in that: The clamping piece (8) has three pieces, and can form an annular structure in the bellows (3).

5. A gas metal flexible hose to prevent impact dislodgement according to claim 4, characterised in that: The inner wall of the clamping ring (4) is provided with a concave ring part (401) for clamping the first convex ring part (301), the clamping ring (4) is provided with a insertion hole part (402) parallel to the axis direction of the bellows (3), the insertion hole part (402) partially overlaps with the concave ring part (401), and the insertion hole part (402) is slidingly connected with an insertion column (403).

6. A gas metal flexible hose to prevent impact-induced dislodgement according to claim 5, characterised in that: One end of the insertion column (403) away from the nut (1) is provided with an inclined chamfer.

7. A gas metal flexible hose to prevent impact dislodgement according to claim 3, characterised in that: The clamping ring (4), the gasket (5) and the rubber plug (6) are sequentially arranged in the nut (1) towards the direction of the bellows (3), one end of the clamping ring (7) or the clamping piece (8) is positioned after contacting the positioning ring (9), and the other end of the positioning ring (9) contacts the rubber plug (6).

8. A gas metal flexible hose which prevents impact and drop-off according to claim 7, characterized in that: The inner diameter of the positioning ring (9) is the same as that of the rubber plug (6), and the outer diameter is equal to the inner diameter of the bellows (3).

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