CN216976088U

CN216976088U - Stainless steel corrugated hose with high air tightness for connecting gas appliances

Info

Publication number: CN216976088U
Application number: CN202123398483.XU
Authority: CN
Inventors: 卓豪军; 凌爱明; 黄红英; 胡旭聪
Original assignee: NINGBO SHISHAN PIPES CO Ltd
Current assignee: NINGBO SHISHAN PIPES CO Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-15
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a stainless steel corrugated hose with high air tightness for connecting a gas appliance, which comprises a corrugated inner pipe, a rubber coating layer, a steel sleeve, an external thread joint, an internal thread gland nut and an inserted interface gasket, wherein the rubber coating layer is coated outside the corrugated inner pipe, the steel sleeve is riveted at the end part of the rubber coating layer, the internal thread gland nut is in threaded connection with the external thread joint, the inserted interface gasket is hollow, the inserted interface gasket is sleeved inside the internal thread gland nut, a sleeve is integrally formed at the end part of the corrugated inner pipe, an expansion part is arranged at the end part of the sleeve, the expansion part comprises an external expansion layer and an internal expansion layer which are formed by folding, the external expansion layer is in clearance fit with the internal expansion layer, the external thread joint is sleeved outside the sleeve, the external thread joint is axially limited between the steel sleeve and the external expansion layer, and the inner end of the inserted interface gasket is provided with an external conical surface matched with the internal expansion layer, the outer conical surface is propped against the inner flaring layer. This structure improves the connection stability.

Description

Stainless steel corrugated hose with high air tightness for connecting gas appliances

Technical Field

The utility model relates to the technical field of corrugated pipes for gas conveying, in particular to a stainless steel corrugated hose for connecting a gas appliance with high air tightness.

Background

Stainless steel corrugated hose is widely used in connection of gas appliances and gas pipelines. The stainless steel corrugated hose can be divided into a screw connection type and an insertion type according to different using modes, wherein the screw connection type stainless steel corrugated hose is connected with a pipeline connector in a threaded connection mode when in use, and the insertion type stainless steel corrugated hose is connected with the pipeline connector in an insertion connection mode.

The structure of bayonet stainless steel corrugated hose usually includes the ripple inner tube, the rubber coating layer, the steel bushing, external thread joint, female thread gland nut and bayonet interface packing ring, the coating layer cladding is in the outside of ripple inner tube, the steel bushing riveting is in the tip of coating layer, the tip welding of ripple inner tube has metal sleeve, the sheathed tube outside is located to the external thread joint cover, female thread gland nut and external thread joint threaded connection, bayonet interface packing ring is the cavity form, the inside of female thread gland nut is located to bayonet interface packing ring cover, sheathed tube tip is provided with the flaring portion, the inner of bayonet interface packing ring is provided with and flaring portion cooperation conical surface. When the connector is used, the pipeline connector is firstly inserted into the plug-in interface gasket, after the pipeline connector is fully inserted, the internal thread compression nut is screwed, the internal thread compression nut drives the plug-in interface gasket to move towards the corrugated inner pipe, and under the matching action of the flaring part and the conical surface, the plug-in interface gasket generates radial shrinkage deformation, so that the pipeline connector is tightly held, and the butt joint of the stainless steel corrugated hose and the pipeline connector is realized.

However, the existing insertion type stainless steel corrugated hose has the disadvantages that: 1. the end part of the corrugated inner pipe is welded with a metal sleeve, and leakage points are easy to appear at the welding position, so that gas leakage is caused, and the use safety is influenced; 2. the flaring portion of the metal sleeve in the prior art is of a single-layer structure, so that the flaring portion does not have elasticity and is influenced by machining precision, the flaring portion is easy to cause the flaring portion to be incapable of fully contacting with the plug-in interface gasket due to low coaxiality, the plug-in interface gasket is not stressed uniformly during use, connection stability is influenced, and meanwhile, the phenomenon of untight sealing is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a stainless steel corrugated hose for connecting a gas appliance with high air tightness, which aims to solve the problem that the existing corrugated pipe in the background art is easy to have leakage points, thereby causing gas leakage and influencing the use safety; poor connection stability and poor sealing.

In order to achieve the purpose, the utility model provides the following technical scheme: a stainless steel corrugated hose with high air tightness for connecting a gas appliance comprises a corrugated inner pipe, a rubber coating layer, a steel sleeve, an external thread joint, an internal thread gland nut and a plug-in interface gasket, wherein the rubber coating layer is coated outside the corrugated inner pipe, the steel sleeve is riveted at the end part of the rubber coating layer, the internal thread gland nut is in threaded connection with the external thread joint, the plug-in interface gasket is hollow, the plug-in interface gasket is sleeved inside the internal thread gland nut, the end part of the corrugated inner pipe is integrally formed with a sleeve, the end part of the sleeve is provided with a flared part, the flared part comprises an external flared layer and an internal flared layer which are formed by folding, the external flared layer is in clearance fit with the internal flared layer, the external thread joint is sleeved outside the sleeve, the external thread joint is axially limited between the steel sleeve and the external flared layer, the inner end of the plug-in interface gasket is provided with an external conical surface which is matched with the internal layer, the outer conical surface is matched with the inner flaring layer in an abutting mode.

In order to improve the holding effect of the plug-in interface gasket on the pipeline joint, the pipeline joint is not easy to fall off, so that the tensile strength of the pipeline joint is higher, and the tensile reinforcing ring is convexly arranged on the inner wall of the plug-in interface gasket along the circumferential direction.

In order to realize the radial effective support of the flaring part and improve the extrusion effect of the flaring part on the insertion type interface gasket, the end part of the external thread joint is provided with an inner conical surface matched with the outer flaring layer, and the inner conical surface is matched with the outer flaring layer in an abutting mode.

In order to avoid the phenomenon that the corrugated hose is rusted or corroded, the service life is prolonged, and the safety is improved, the steel sleeve comprises a connecting part and an extending part which are integrally arranged along the axial direction, the connecting part is riveted with the rubber coating layer, a water stop ring extends along the axial direction from one end, close to the rubber coating layer, of the external threaded joint, the extending part is sleeved with the water stop ring, and a sealing ring is embedded between the water stop ring and the extending part; the outer screwed joint axial is spacing in the extension with between the outer flaring layer, above-mentioned structure is through passing through extension and seal ring cooperation to set up the sealing washer between the two, can prevent effectively that liquid from permeating to corrugated hose's inside, thereby can avoid corrugated hose to appear rustting or by the corrosion phenomenon, be favorable to increase of service life and security.

Preferably, the diameter of the extension part is larger than that of the connecting part, the extension part is sleeved outside the water stop ring, and in the structure, the extension part is sleeved outside the water stop ring, so that the water stop ring can be protected.

In order to improve double waterproof sealing, two sealing rings are axially arranged between the water stop ring and the extension part.

Compared with the prior art, the utility model has the following beneficial effects: because the sleeve and the corrugated inner pipe are integrally formed, compared with the existing welding type sleeve, the welding leakage point is avoided, the gas leakage is not easy to occur, and the air tightness and the safety are higher; the adoption has interior flaring layer and the double-deck flaring portion that outer flaring layer cooperation formed for the flaring portion possesses certain elasticity, makes bayonet interface packing ring more abundant with the contact of flaring portion, and when connecting tube connects, bayonet interface packing ring atress is more even, and connection stability is higher, and the leakproofness is better.

Drawings

FIG. 1 is a schematic view showing the overall structure of a stainless steel corrugated hose for gas appliance connection with high airtightness according to example 1;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is an enlarged view of fig. 1 at B.

In the figure: the corrugated pipe comprises a corrugated inner pipe 1, a rubber coating layer 2, a steel sleeve 3, a connecting part 3-1, an extending part 3-2, an external thread joint 4, an internal thread gland nut 5, an inserted interface gasket 6, a sleeve 7, a flared part 8, an external flared layer 8-1, an internal flared layer 8-2, an external conical surface 9, a tensile reinforcement ring 10, a water stop ring 11, an internal conical surface 12 and a sealing ring 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-3, the stainless corrugated hose for connecting a gas appliance with high gas tightness disclosed in this embodiment includes a corrugated inner tube 1, a rubber coating 2, a steel sleeve 3, an external thread joint 4, an internal thread gland nut 5 and an insertion type interface gasket 6, the rubber coating 2 covers the corrugated inner tube 1, the steel sleeve 3 is riveted on the end of the rubber coating 2, the internal thread gland nut 5 is in threaded connection with the external thread joint 4, the insertion type interface gasket 6 is hollow, the insertion type interface gasket 6 is sleeved inside the internal thread gland nut 5, a sleeve 7 is integrally formed on the end of the corrugated inner tube 1, an expanded portion 8 is provided on the end of the sleeve 7, the expanded portion 8 includes an outer expanded portion 8-1 and an inner expanded portion 8-2 formed by folding, the outer expanded portion 8-1 is in clearance fit with the inner expanded portion 8-2, the external thread joint 4 is sleeved outside the sleeve 7, the external thread joint 4 is axially limited between the steel sleeve 3 and the outer flaring layer 8-1, the inner end of the plug-in interface gasket 6 is provided with an external conical surface 9 matched with the inner flaring layer 8-2, and the external conical surface 9 is matched with the inner flaring layer 8-2 in a propping mode.

In the structure, as the sleeve 7 and the corrugated inner pipe 1 are integrally formed, compared with the existing welding type sleeve 7, the welding leakage point is avoided, the gas leakage is not easy to occur, and the air tightness and the safety are higher; 2 adopt the double-deck flaring portion 8 that has interior flaring layer 8-2 and the cooperation of flaring layer 8-1 to form outward for flaring portion 8 possesses certain elasticity, makes bayonet interface packing ring 6 more abundant with the contact of flaring portion 8, and when connecting tube connects, bayonet interface packing ring 6 atress is more even, and connection stability is higher, and the leakproofness is better.

In order to improve the holding effect of the insertion type interface gasket 6 on the pipeline joint, the pipeline joint is not easy to fall off, so that the tensile strength of the pipeline joint is higher, and the tensile strength ring 10 is convexly arranged on the inner wall of the insertion type interface gasket 6 along the circumferential direction.

In order to realize effective radial support of the flared part 8 and improve the extrusion effect of the flared part 8 on the inserted interface gasket 6, the end part of the male adapter 4 is provided with an inner conical surface 12 matched with the outer flared layer 8-1, and the inner conical surface 12 is matched against the outer flared layer 8-1.

In order to avoid the phenomenon of rusting or corrosion of the corrugated hose and be beneficial to prolonging the service life and safety, the steel sleeve 3 comprises a connecting part 3-1 and an extending part 3-2 which are integrally arranged along the axial direction, the connecting part 3-1 is riveted with the rubber coating layer 2, a water stop ring 11 extends along the axial direction from one end, close to the rubber coating layer 2, of the external thread joint 4, the extending part 3-2 is sleeved with the water stop ring 11, and a sealing ring 13 is embedded between the water stop ring 11 and the extending part 3-2; the external thread joint 4 is axially limited between the extension part 3-2 and the outer flaring layer 8-1, the structure is matched with the water stop ring 11 through the extension part 3-2, and the sealing ring 13 is arranged between the extension part 3-2 and the water stop ring, so that liquid can be effectively prevented from permeating into the corrugated hose, the phenomenon that the corrugated hose is rusted or corroded can be avoided, and the service life and the safety are prolonged.

Preferably, the diameter of the extension portion 3-2 is larger than that of the connecting portion 3-1, the extension portion 3-2 is sleeved outside the water stop ring 11, and in the above structure, the extension portion 3-2 is sleeved outside the water stop ring 11, so that the water stop ring 11 can be protected.

In order to improve double waterproof sealing, two sealing rings 13 are axially arranged between the water stop ring 11 and the extension part 3-2, and the sealing effect is further improved by additionally arranging the two sealing rings 13.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a stainless steel corrugated hose is used in connection of gas appliances that gas tightness is high, includes ripple inner tube (1), rubber coating layer (2), steel bushing (3), external screw thread joint (4), internal thread gland nut (5) and bayonet interface packing ring (6), rubber coating layer (2) cladding is in the outside of ripple inner tube (1), the tip in rubber coating layer (2) is riveted in steel bushing (3), internal thread gland nut (5) and external screw thread joint (4) threaded connection, bayonet interface packing ring (6) are the cavity form, the inside of internal thread gland nut (5), its characterized in that are located to bayonet interface packing ring (6) cover: the corrugated pipe is characterized in that a sleeve (7) is integrally formed at the end of the corrugated inner pipe (1), an expanding portion (8) is arranged at the end of the sleeve (7), the expanding portion (8) comprises an outer expanding layer (8-1) and an inner expanding layer (8-2) which are formed through turning over, the outer expanding layer (8-1) and the inner expanding layer (8-2) are in clearance fit, the outer portion of the sleeve (7) is sleeved with an external thread joint (4), the external thread joint (4) is axially limited between the steel sleeve (3) and the outer expanding layer (8-1), an outer conical surface (9) matched with the inner expanding layer (8-2) is arranged at the inner end of the plug-in type interface gasket (6), and the outer conical surface (9) is matched with the inner expanding layer (8-2) in a propping manner.

2. The stainless steel corrugated hose for gas appliance connection having high airtightness according to claim 1, wherein: and the inner wall of the plug-in interface gasket (6) is convexly provided with a tensile enhancement ring (10) along the circumferential direction.

3. The stainless steel corrugated hose for gas appliance connection having high airtightness according to claim 1, wherein: the end part of the external thread joint (4) is provided with an inner conical surface (12) matched with the outer flaring layer (8-1), and the inner conical surface (12) is matched with the outer flaring layer (8-1) in an abutting mode.

4. The stainless steel corrugated hose for gas appliance connection having high airtightness according to claim 1, wherein: the steel sleeve (3) comprises a connecting part (3-1) and an extending part (3-2) which are integrally arranged along the axial direction, the connecting part (3-1) is riveted with the rubber coating layer (2), a water stop ring (11) extends along the axial direction from one end, close to the rubber coating layer (2), of the external threaded joint (4), the extending part (3-2) is sleeved with the water stop ring (11), and a sealing ring (13) is embedded between the water stop ring (11) and the extending part (3-2); the external thread joint (4) is axially limited between the extension part (3-2) and the outer flaring layer (8-1).

5. The stainless steel corrugated hose for gas appliance connection having high airtightness according to claim 4, wherein: the diameter of the extension part (3-2) is larger than that of the connecting part (3-1), and the extension part (3-2) is sleeved outside the water stop ring (11).

6. The stainless steel corrugated hose for gas appliance connection having high airtightness according to claim 4, wherein the corrugated hose comprises: and two sealing rings (13) are axially arranged between the water stop ring (11) and the extension part (3-2).