CN210890472U - Gas bellows - Google Patents

Abstract

The utility model discloses a gas bellows, including corrugated metal pipe, set up the interface at corrugated metal pipe tip, be connected with the interface on the interface, the axial equipartition has annular arch on the corrugated metal pipe, form the tip clearance between corrugated metal pipe's tip and the adjacent annular arch, the interface overcoat is equipped with sealed cutting ferrule, sealed cutting ferrule to corrugated metal pipe extends, sealed cutting ferrule with be equipped with first sealing ring between the tip clearance, the tip that sealed cutting ferrule is located interface one side is equipped with the second sealing ring, first sealing ring forms sealed chamber to the space between the second sealing ring in the cutting ferrule. Set up sealed cutting ferrule between bellows and interface, the cutting ferrule both ends are equipped with sealed chamber and seal between bellows and the interface to store the gas of leaking in sealed intracavity, sealing performance is better, and is safer.

Description

Gas bellows

Technical Field

The utility model belongs to the technical field of the gas pipeline technique and specifically relates to a gas bellows is related to.

Background

Along with the popularization of natural gas and other gases, gas cookers are used more and more in life, a gas pipe is needed to be connected between an air inlet hose and an air inlet of the gas cooker, at present, a loose nut is used for connecting a cooker and the gas pipe by a joint of most of the gas pipes, and gas leakage is easy to occur at the joint.

Chinese patent application publication No. CN201615298U, entitled "non-fixed length stainless steel bellows joint assembly for gas", which was published as 10/27/2010, discloses a non-fixed length stainless steel bellows joint assembly for gas. The joint assembly comprises a nut sleeved at the end part of a corrugated pipe, a threaded joint screwed with the nut and a sealing washer positioned at the end face of the threaded joint adjacent to the nut, wherein the nut is provided with a circular bead with the inner diameter smaller than the diameter of a threaded bottom, the joint assembly further comprises a reinforcing ring, the inner wall of the reinforcing ring is provided with corrugations matched with the corrugated pipe, and the corrugations are fixed at the end part of the corrugated pipe. The reinforcing ring does not fully exert its sealing effect, so the anti-drawing force is limited, and when the internal pressure of the conveying fluid is high and the fluctuation is large, the leakage is possible.

Disclosure of Invention

The utility model discloses an overcome the problem of advancing the gas pipe especially gas coupling gas leakage, provide a gas bellows, pipe joint's sealed effectual.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a gas bellows, includes corrugated metal pipe, sets up the interface at corrugated metal pipe tip, is connected with the interface on the interface, and the axial equipartition has annular arch on the corrugated metal pipe, form the tip clearance between corrugated metal pipe's tip and the adjacent annular arch, the interface overcoat is equipped with sealed cutting ferrule, sealed cutting ferrule to corrugated metal pipe extends, sealed cutting ferrule with be equipped with first sealing ring between the tip clearance, the tip that sealed cutting ferrule is located interface one side is equipped with the second sealing ring, the space between first sealing ring to the second sealing ring in the cutting ferrule forms sealed chamber.

In the above scheme, set up sealed cutting ferrule between bellows and interface, the cutting ferrule both ends are equipped with sealed chamber, in order to form sealed chamber, connect with the junction of bellows easily takes place to leak, it can carry out better sealed to the gas pipe to set up sealed cutting ferrule between bellows and interface, because fixed connection such as welding is adopted usually between bellows and the interface, can have the hole of leaking the gas between bellows and the interface, it can seal between bellows and the interface to form sealed chamber, and store the gas of leaking in sealed chamber, can return gas pressure to in the gas pipe when the pipeline internal gas pressure changes hour.

Preferably, two ends of the sealing cutting sleeve are bent to form folded edges, a protruding gap is formed between the adjacent annular protrusions, a limiting groove is formed in the outer surface of the interface, the folded edge of the sealing cutting sleeve, which is located on one side of the metal corrugated pipe, extends into the protruding gap adjacent to the end gap, the folded edge of the sealing cutting sleeve, which is located on one side of the interface, extends into the limiting groove, and the second sealing ring is arranged in the limiting groove. Sealed cutting ferrule fixes through the hem, and it is comparatively convenient during production equipment, will be located the hem of interface one side and stretch into the spacing inslot, and the second sealing ring sets up at the spacing inslot for the second sealing ring is sealed the hem that is located interface one side and the cooperation of spacing groove.

Preferably, the second sealing ring is provided with a groove along the inner circumference thereof, and the groove is filled with rubber. The second sealing ring is provided with a groove, frozen and compressed rubber is filled in the groove, after the temperature rises, the volume of the rubber expands, and the expansion groove enables the sealing effect to be better.

Preferably, the sealing gasket is a double-layer sealing gasket, the double-layer sealing gasket comprises a first sealing layer and a second sealing layer positioned on the outer side of the first sealing layer, a V-shaped groove is formed in the first sealing layer, a V-shaped protrusion matched with the V-shaped groove is formed in the second sealing layer, and a gap is formed between the V-shaped groove and the V-shaped protrusion. The gas stove gas inlet is arranged in the connector, the gas stove gas inlet is in contact with the second sealing layer and extrudes the second sealing layer, the second sealing layer is extruded forwards, so that a gap between the V-shaped groove and the V-shaped protrusion is eliminated, and the second sealing layer is tightly attached to the end face of the gas stove gas inlet to form good sealing.

Preferably, one end of the interface extending into the joint extends axially to form a sealing bulge, and a sealing gasket is arranged between the sealing bulge and the inner side wall of the joint. The sealing gasket is arranged in the joint, so that the sealing performance of the joint and the gas inlet pipe of the gas stove can be further enhanced.

Preferably, the metal corrugated pipe is sleeved with a flame-retardant sleeve, and the end part of the flame-retardant sleeve is fastened in a bulge gap adjacent to the end gap through a sealing clamping sleeve. The flame-retardant sleeve can protect the metal corrugated pipe, and the end part of the flame-retardant sleeve is fastened in a protruding gap adjacent to the end part gap through a sealing clamping sleeve, so that the flame-retardant sleeve is convenient to mount.

The utility model has the advantages that: the sealing cavity is adopted to seal the joint of the corrugated pipe and the interface, the sealing effect is good, a small amount of leaked gas can be stored and reused, and the sealing gasket is adopted to seal the joint of the joint and the gas inlet of the gas stove, so that the leakage of the gas from the joint and the gas inlet of the gas stove is prevented. The sealing performance is enhanced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a joint of the present invention;

fig. 3 is an enlarged view of a position a of the present invention.

In the figure: the sealing structure comprises a metal corrugated pipe 1, an end gap 11, a connector 2, a limiting groove 21, a sealing protrusion 22, a connector 3, a sealing gasket 31, a first sealing layer 311, a second sealing layer 312, a gap 313, an internal thread 32, a sealing cutting sleeve 4, a first sealing ring 5, a second sealing ring 6, a groove 61 and a flame-retardant sleeve 7.

Detailed Description

To make the objects, technical solutions and advantages of embodiments of the present invention clearer, the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present solution, and are not construed as limiting the present solution.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "a plurality" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as fixed or removable connections or integral parts, either mechanically or electrically, or in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art

The specific embodiment is as follows: a gas corrugated pipe comprises a metal corrugated pipe 1 and a connector 2 arranged at the end part of the metal corrugated pipe, wherein the connector 3 is connected onto the connector, internal threads 32 are arranged in the connector, annular bulges are uniformly distributed on the metal corrugated pipe in the axial direction, an end part gap 11 is formed between the end part of the metal corrugated pipe and the adjacent annular bulges, a sealing cutting sleeve 4 is sleeved outside the connector and extends towards the metal corrugated pipe, a first sealing ring 5 is arranged between the sealing cutting sleeve and the end part gap, a second sealing ring 6 is arranged at the end part of the sealing cutting sleeve positioned at one side of the connector, a sealing cavity 42 is formed in the space between the first sealing ring and the second sealing ring in the sealing cutting sleeve, a groove 61 is arranged along the inner circumferential direction of the second sealing ring, rubber is filled in the groove, and the end of the connector extending into the connector extends along the axial direction to form a sealing bulge 22, and a sealing gasket 31 is arranged between the sealing bulge and the inner side wall of the joint.

The metal corrugated pipe can be a copper alloy pipe or a stainless steel pipe, in the embodiment, the metal corrugated pipe is a stainless steel corrugated pipe, a sealing clamping sleeve is arranged between the corrugated pipe and the connector, two ends of the clamping sleeve are provided with sealing cavities to form the sealing cavities, the joint of the connector and the corrugated pipe is easy to leak, the sealing clamping sleeve is arranged between the corrugated pipe and the connector to better seal the gas pipe, because the corrugated pipe and the connector are fixedly connected by welding and the like, a gas leakage pore can be formed between the corrugated pipe and the connector, the sealing cavity can be formed to seal the corrugated pipe and the connector, the leaked gas can be stored in the sealing cavity, when the pressure in the pipeline is changed, the gas can be pressed back into the gas pipe, a groove is arranged on the second sealing ring, the frozen and compressed rubber is filled in the groove, after the temperature is raised, the volume of the rubber is expanded, and the sealing, the sealing gasket is arranged in the joint, so that the sealing performance of the joint and the gas inlet pipe of the gas stove can be further enhanced.

Furthermore, two ends of the sealing cutting sleeve are bent to form folded edges 41, a protruding gap is formed between the adjacent annular protrusions, a limiting groove 21 is formed in the outer surface of the interface, the folded edge of the sealing cutting sleeve, which is located on one side of the metal corrugated pipe, extends into the protruding gap adjacent to the end gap, the folded edge of the sealing cutting sleeve, which is located on one side of the interface, extends into the limiting groove, and the second sealing ring is arranged in the limiting groove. Sealed cutting ferrule fixes through the hem, and it is comparatively convenient during production equipment, will be located the hem of interface one side and stretch into the spacing inslot, and the second sealing ring sets up at the spacing inslot for the second sealing ring is sealed the hem that is located interface one side and the cooperation of spacing groove.

Furthermore, a flame-retardant sleeve 7 is sleeved outside the metal corrugated pipe, and the end part of the flame-retardant sleeve is fastened in a bulge gap adjacent to the end part gap through a sealing clamping sleeve. The flame-retardant sleeve can protect the metal corrugated pipe, and the end part of the flame-retardant sleeve is fastened in a protruding gap adjacent to the end part gap through a sealing clamping sleeve, so that the flame-retardant sleeve is convenient to mount.

Further, the sealing gasket is a double-layer sealing gasket, the double-layer sealing gasket comprises a first sealing layer 311 and a second sealing layer 312 positioned on the outer side of the first sealing layer, a V-shaped groove is formed in the first sealing layer, a V-shaped protrusion matched with the V-shaped groove is formed in the second sealing layer, and a gap 313 is formed between the V-shaped groove and the V-shaped protrusion. The gas stove gas inlet is arranged in the connector, the gas stove gas inlet is in contact with the second sealing layer and extrudes the second sealing layer, the second sealing layer is extruded forwards, so that a gap between the V-shaped groove and the V-shaped protrusion is eliminated, and the second sealing layer is tightly attached to the end face of the gas stove gas inlet to form good sealing.

The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.

Claims (8)

1. The utility model provides a gas bellows, includes corrugated metal pipe and sets up the interface at corrugated metal pipe tip, is connected with the joint on the interface, and the axial equipartition has annular arch on the corrugated metal pipe, characterized by, form the tip clearance between corrugated metal pipe's tip and the adjacent annular arch, the interface overcoat is equipped with sealed cutting ferrule, sealed cutting ferrule to corrugated metal pipe extends, sealed cutting ferrule with be equipped with first sealing ring between the tip clearance, the tip that sealed cutting ferrule is located interface one side is equipped with the second sealing ring, the space between first sealing ring to the second sealing ring in the cutting ferrule forms sealed chamber.

2. A gas corrugated pipe as claimed in claim 1, wherein the two ends of the sealing sleeve are bent to form folded edges, a protruding gap is formed between the adjacent annular protrusions, the outer surface of the joint is provided with a limiting groove, the folded edge of the sealing sleeve on one side of the metal corrugated pipe extends into the protruding gap adjacent to the end gap, the folded edge of the sealing sleeve on one side of the joint extends into the limiting groove, and the second sealing ring is arranged in the limiting groove.

3. A gas bellows as claimed in claim 2, wherein the second sealing ring has a groove along its inner circumference, the groove being filled with rubber.

4. A gas corrugated pipe as claimed in claim 1, 2 or 3, wherein the end of the mouthpiece extending into the coupling extends axially to form a sealing protrusion, and a sealing gasket is provided between the sealing protrusion and the inner side wall of the coupling.

5. A gas corrugated pipe as claimed in claim 4, wherein the sealing gasket is a double-layer sealing gasket, the double-layer sealing gasket comprises a first sealing layer and a second sealing layer positioned outside the first sealing layer, the first sealing layer is provided with a V-shaped groove, the second sealing layer is provided with a V-shaped protrusion matched with the V-shaped groove, and a gap is formed between the V-shaped groove and the V-shaped protrusion.

6. A gas fired bellows as claimed in claim 1, 2 or 3 wherein the metal bellows is sheathed with a flame retardant jacket, the end of which is secured in a boss gap adjacent the end gap by a sealing ferrule.

7. A gas bellows as claimed in claim 1, 2 or 3, wherein the metal bellows is a stainless steel bellows.

8. A gas bellows as claimed in claim 1, 2 or 3, wherein the coupling is internally threaded.

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