Corrugated hose for fuel gas

Abstract

The utility model relates to the field of corrugated pipes, in particular to a corrugated hose for fuel gas, which comprises a corrugated pipe sleeved with a corrosion-resistant metal mesh layer. According to the corrugated hose for the fuel gas, the corrugated pipe, the first threaded connector, the limiting groove, the adapter, the second threaded connector, the first sealing ring, the second sealing ring, the outer cylinder, the elastic piece, the limiting block and the outer nut are arranged, and the adapter is in butt joint with the corrugated pipe; an outer cylinder outside the adapter, an elastic piece and a limiting block extend into a limiting groove in the first threaded connector, the limiting block can be clamped in the limiting groove to form clamping butt joint, then the corrugated pipe and the adapter are in threaded connection by rotating an outer nut outside the adapter, and meanwhile the sealing effect is achieved through the arrangement of a first sealing ring and a second sealing ring; the connection mode enhances the firmness and the sealing performance between the two parts.

Description

Technical Field

[0001] The utility model relates to the field of bellows, in particular to a corrugated hose for gas. Background Art

[0002] The corrugated hose is a flexible pressure-resistant pipe installed in the liquid transportation system to compensate for the mutual displacement of the connection ends of pipelines or machines and equipment. The gas corrugated hose is a special pipeline for transporting combustible gas. It is a metal gas pipe hose that replaces the traditional clip-on rubber hose.

[0003] After searching, a utility model corrugated hose for connecting gas appliances with announcement number CN220016364U includes a corrugated hose, the surface fixing sleeve of the corrugated hose is provided with a braided layer, and the surface fixing sleeve of the braided layer is provided with a protective layer, which solves the problem that the existing corrugated hose cannot position the pipeline during use, causing the exposed pipeline to be easily entangled with each other, and the pipeline surface has poor wear resistance and is prone to wear when rubbing against foreign objects. The corrugated hose for connecting gas appliances includes a corrugated hose, the surface fixing sleeve of the corrugated hose is provided with a braided layer, and the surface fixing sleeve of the braided layer is provided with a protective layer, both sides of the inner cavity of the corrugated hose are movably connected with flange joints, the surface movable sleeve of the flange joint is provided with a quarter cap, both sides of the surface of the protective layer are fixed with steel sleeves, the surface fixing sleeve of the protective layer is provided with a positioning ring, the rear side of the positioning ring is riveted with a clamping block, and the surface movable sleeve of the clamping block is provided with a positioning mechanism.

[0004] The utility model has the advantages of convenient installation and long service life.

[0005] In the above patent, the corrugated hose is simply connected to the gas joint by threaded connection during the installation process. The commonly used simple threaded connection method is too simple and lacks certain stability and sealing. When it is subjected to some vibration or impact in daily life, it is easy to cause looseness and instability, which may cause gas leakage after loosening, causing safety hazards.

[0006] Therefore, it is necessary to invent a gas corrugated hose to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a corrugated hose for gas to solve the problems raised in the above background technology.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a corrugated hose for gas, comprising a corrugated pipe, the outer sleeve of the corrugated pipe is provided with a corrosion-resistant metal mesh layer, first threaded joints are fixedly installed on the outer sides of both ends of the corrugated pipe, a limiting groove is provided on the inner surface of the first threaded joint, an adapter is movably connected with the two ends of the bellows, a second threaded joint is fixedly installed on the outside of the adapter, a first sealing ring is provided on one side of the second threaded joint, a second sealing ring is provided on the outside of the adapter, an outer cylinder is fixedly installed on the outside of the adapter, a spring sheet is fixedly installed on one side of the outer cylinder, a limiting block is fixedly installed on one end of the spring sheet, and an external nut is movably connected to the outside of the adapter.

[0009] Preferably, a heat-resistant layer is pasted inside the corrugated pipe, and the heat-resistant layer is made of aluminum silicate fiber felt.

[0010] Preferably, a corrosion-resistant layer is pasted inside the heat-resistant layer, and the corrosion-resistant layer is made of three layers of polyethylene.

[0011] Preferably, the outside of the corrosion-resistant metal mesh layer is movably connected with a clamp, bolts penetrate through both sides of the clamp, and a mounting seat is fixedly installed below the clamp.

[0012] Preferably, the first sealing ring is arranged on one side of the second threaded joint, and the second sealing ring is arranged between the inner wall of the bellows and the outside of the adapter.

[0013] Preferably, the limiting groove provided inside the first threaded joint is snap-fitted with a limiting block fixedly installed on one side of the spring sheet, and the limiting block is used in conjunction with the limiting groove.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. Through the arrangement of the bellows, the first threaded joint, the limiting groove, the adapter, the second threaded joint, the first sealing ring, the second sealing ring, the outer cylinder, the spring piece, the limiting block and the outer nut, when the corrugated hose needs to be docked with the gas joint, it is necessary to strengthen the firmness between the two. By docking the adapter with the bellows, the outer cylinder, the spring piece and the limiting block outside the adapter are extended into the limiting groove in the first threaded joint, so that the limiting block can be stuck in the limiting groove to form a clamping docking. Then, by rotating the outer nut outside the adapter, the bellows and the adapter are threadedly connected. At the same time, the arrangement of the first sealing ring and the second sealing ring forms a sealing effect. Such a connection method strengthens the firmness and sealing between the two.

[0016] 2. The bellows, corrosion-resistant metal mesh layer, heat-resistant layer and corrosion-resistant layer are provided. The corrosion-resistant metal mesh layer can prevent the bellows from being exposed to the outside for a long time and causing corrosion. The heat-resistant layer can protect the internal pipeline under high temperature external environment. The corrosion-resistant layer can prevent the internal gas from corroding the inside of the bellows, thereby causing gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the heat-resistant layer and the corrosion-resistant layer of the utility model;

[0020] Figure 3 This is a schematic diagram of the clamp structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the first threaded joint structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the outer cylinder structure of the utility model.

[0023] Description of reference numerals:

[0024] 1. Bellows; 2. Corrosion-resistant metal mesh layer; 3. Heat-resistant layer; 4. Corrosion-resistant layer; 5. Clamp; 6. Bolt; 7. Mounting seat; 8. First threaded joint; 9. Limiting groove; 10. Adapter; 11. Second threaded joint; 12. First sealing ring; 13. Second sealing ring; 14. Outer tube; 15. Spring piece; 16. Limiting block; 17. Outer nut. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model provides Figure 1-5The bellows hose for gas shown in the figure comprises a bellows 1, the outer sleeve of the bellows 1 is provided with a corrosion-resistant metal mesh layer 2, the outer sides of the two ends of the bellows 1 are fixedly installed with a first threaded joint 8, the inner surface of the first threaded joint 8 is provided with a limiting groove 9, the two ends of the bellows 1 are movably connected with an adapter 10, the outer side of the adapter 10 is fixedly installed with a second threaded joint 11, one side of the second threaded joint 11 is provided with a first sealing ring 12, the outer side of the adapter 10 is provided with a second sealing ring 13, and the outer side of the adapter 10 is fixedly provided with an outer The outer tube 14 is fixedly installed with a spring piece 15 on one side of the outer tube 14, and a limiting block 16 is fixedly installed on one end of the spring piece 15. The outer part of the adapter 10 is movably connected with an external nut 17. By docking the adapter 10 with the bellows 1, the outer tube 14 outside the adapter 10, the spring piece 15 and the limiting block 16 are extended into the limiting groove 9 in the first threaded joint 8, so that the limiting block 16 can be stuck in the limiting groove 9 to form a snap-fit ​​docking, and then the corrugated pipe 1 is threadedly connected to the adapter 10 by rotating the external nut 17 outside the adapter 10.

[0027] like Figure 1 and Figure 2 As shown, a heat-resistant layer 3 is pasted inside the corrugated pipe 1. The heat-resistant layer 3 is made of aluminum silicate fiber felt. The heat-resistant layer 3 can protect the internal pipeline in an external high-temperature environment.

[0028] like Figure 2 As shown, a corrosion-resistant layer 4 is pasted inside the heat-resistant layer 3. The corrosion-resistant layer 4 is made of three layers of polyethylene. The corrosion-resistant layer 4 can prevent the internally transported gas from corroding the inside of the bellows 1, thereby causing gas leakage.

[0029] like Figure 1 and Figure 3 As shown, the corrosion-resistant metal mesh layer 2 is movably connected to the outside with a clamp 5, bolts 6 are passed through both sides of the clamp 5, and a mounting seat 7 is fixedly installed below the clamp 5. The arrangement of the clamp 5 facilitates the fixed installation of the bellows 1.

[0030] like Figure 5 As shown, the first sealing ring 12 is arranged on one side of the second threaded joint 11, and the second sealing ring 13 is arranged between the inner wall of the bellows 1 and the outside of the adapter 10. One end of the bellows 1 presses against the first sealing ring 12 on one side of the second threaded joint 11 to form a seal, and the second sealing ring 13 is arranged between the inner wall of the bellows 1 and the outside of the adapter 10 to also form a seal.

[0031] like Figure 4 and Figure 5As shown, the limit groove 9 opened inside the first threaded joint 8 and the limit block 16 fixedly installed on one side of the spring piece 15 form a snap-fit ​​connection, and the limit block 16 is used in conjunction with the limit groove 9. The snap-fit ​​connection setting of the limit block 16 and the limit groove 9 strengthens the connectivity between the bellows 1 and the adapter 10.

[0032] The working principle of the utility model is as follows: firstly, one end of the bellows 1 is docked with the adapter 10 for conveying gas, and then the outer tube 14 outside the adapter 10, the spring piece 15 and the limit block 16 are extended into the limit groove 9 in the first threaded joint 8, so that the adapter 10 and the limit block 16 can be stuck in the limit groove 9 to form a snap-fit ​​docking, and then the bellows 1 and the adapter 10 are threadedly connected by rotating the outer nut 17 outside the adapter 10, and at the same time, one end of the internal bellows 1 is pressed against the first sealing ring 12 on one side of the second threaded joint 11 to form a sealing effect, and the second sealing ring 13 is provided between the inner wall of the bellows 1 and the outside of the adapter 10 to form a seal. Next, connect the other end of the bellows 1 to the equipment that needs to provide gas through the steps just now, and then put the clamp 5 on the outside of the corrosion-resistant metal mesh layer 2 to fix the overall corrugated hose. The bellows 1 itself is a hose and can be bent at will, and the corrosion-resistant metal mesh layer 2 wrapped on the outside of the bellows 1 can prevent the bellows 1 from being exposed to the outside for a long time and causing corrosion. The setting of the heat-resistant layer 3 can protect the internal pipeline under the external high temperature environment, and the setting of the corrosion-resistant layer 4 can prevent the internal transported gas from corroding the inside of the bellows 1, thereby causing gas leakage. In this way, the use process of the gas corrugated hose is completed.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A corrugated hose for gas, comprising a corrugated tube (1), characterized in that: The outer portion of the bellows (1) is sleeved with a corrosion-resistant metal mesh layer (2); first threaded joints (8) are fixedly installed on the outer sides of both ends of the bellows (1); a limiting groove (9) is provided on the inner surface of the first threaded joint (8); an adapter (10) is movably connected to the two ends of the bellows (1); a second threaded joint (11) is fixedly installed on the outer side of the adapter (10); a first sealing ring (12) is provided on one side of the second threaded joint (11); a second sealing ring (13) is provided on the outer side of the adapter (10); an outer tube (14) is fixedly installed on the outer side of the outer tube (14); a spring sheet (15) is fixedly installed on one side of the outer tube (14); a limiting block (16) is fixedly installed on one end of the spring sheet (15); and an outer nut (17) is movably connected to the outer side of the adapter (10).

2. A corrugated hose for gas according to claim 1, characterized in that: A heat-resistant layer (3) is adhered to the interior of the corrugated tube (1), and the material of the heat-resistant layer (3) is aluminum silicate fiber felt.

3. A corrugated hose for gas according to claim 2, characterized in that: A corrosion-resistant layer (4) is pasted inside the heat-resistant layer (3), and the corrosion-resistant layer (4) is made of three layers of polyethylene.

4. A corrugated hose for gas according to claim 1, characterized in that: The outside of the corrosion-resistant metal mesh layer (2) is movably connected with a clamp (5), both sides of the clamp (5) are penetrated by bolts (6), and a mounting seat (7) is fixedly installed below the clamp (5).

5. The corrugated hose for gas according to claim 1, characterized in that: The first sealing ring (12) is arranged on one side of the second threaded joint (11), and the second sealing ring (13) is arranged between the inner wall of the bellows (1) and the outside of the adapter (10).

6. A corrugated hose for gas according to claim 1, characterized in that: The limiting groove (9) provided inside the first threaded joint (8) and the limiting block (16) fixedly installed on one side of the spring sheet (15) form a snap-fit ​​connection, and the limiting block (16) and the limiting groove (9) are used in conjunction with each other.

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