Anti-drawing metal gas corrugated pipe

Abstract

The utility model discloses an anti-drawing metal fuel gas corrugated pipe which comprises an outer sleeve, a fuel gas corrugated pipe is sleeved with the outer sleeve, the two ends of the fuel gas corrugated pipe are respectively sleeved with a connecting sleeve, and the other end of each connecting sleeve is fixedly connected with a butt joint. Firstly, the connecting sleeve is connected to the outer wall of the gas corrugated pipe in a sleeving mode, then the sealing sleeve is connected to the outer wall of the gas corrugated pipe in a sleeving mode, at the moment, the connecting sleeve moves towards the position of the sealing sleeve, then the inner sleeve is installed in the connecting sleeve, and the butt joint and the gas joint are in threaded butt joint; the gas structure extrudes the inner sleeve and the sealing ring towards one side of the sealing sleeve, when thrust is blocked, the gas connector, the inner sleeve, the sealing ring, the sealing sleeve and the connecting part of the gas corrugated pipe can be in butt joint in a sealed state at the moment, and therefore the device is provided with a multi-stage sealing structure in the using process; and therefore, the sealing safety after the gas corrugated pipe is connected with the gas joint can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas bellows, and in particular relates to a tensile-resistant metal gas bellows. Background Art

[0002] Gas bellows are primarily composed of stainless steel sheets and a lining of specialized materials, which impart exceptional performance. Stainless steel is not only corrosion-resistant but also possesses high strength and toughness, enabling it to maintain stable operation in a variety of environments. Gas bellows are widely used due to their superior performance. In household gas systems, they are often used to connect gas appliances such as gas stoves and gas water heaters. In municipal pipeline networks, gas bellows are used to deliver gas to homes and businesses.

[0003] The core element of connecting the gas bellows to the gas connector is a seamless connection achieved through a carefully designed flexible joint. This joint not only ensures flexible connection but also incorporates effective safety considerations. A specially designed joint seal is located in the precise area where the joint meets the gas connection. This seal is designed to create a secure and reliable seal through a tight fit and gentle compression of the butt joint. This design ensures an absolute seal during gas flow, preventing any leakage and thus ensuring both user safety and environmental protection.

[0004] However, it's worth noting that while this sealing system was designed with durability and long-term stability in mind, over time and repeated use, the movable joints and their gaskets are subject to natural wear and aging. These physical changes gradually weaken the seal, leading to a gradual decline in the sealing performance of the joints. Once the sealing performance no longer meets safety standards, there is a risk of gas leakage, which would not only directly affect the normal gas supply but also pose serious safety hazards such as fire and explosion, posing a threat to personal and property safety. Utility Model Content

[0005] The purpose of the present utility model is to provide a tensile-resistant metal gas bellows, which aims to solve the problem that, although the sealing system was designed with durability and long-term stability in mind, the movable joints and their sealing gaskets are still subject to natural wear and aging over time and repeated use. This physical change will gradually weaken the sealing effect, resulting in a gradual decrease in the sealing performance of the joint. Once the sealing performance no longer meets safety standards, there is a risk of gas leakage, which will not only directly affect the normal supply of gas, but may also bring serious safety hazards such as fire and explosion, posing a threat to personal safety and property safety.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a tensile-resistant metal gas bellows, comprising an outer sleeve, a gas bellows being sleeved on the interior of the outer sleeve, a connecting sleeve being sleeved on each of the two ends of the gas bellows, a butt joint being fixedly connected to the other end of the connecting sleeve, and a sealing sleeve being installed on the interior of the connecting sleeve;

[0007] A reinforcing rod is installed inside an opening on one side of the sealing sleeve, an inner sleeve is also installed inside the connecting sleeve on one side of the sealing sleeve, and a sealing ring is fixedly bonded on both sides of the inner sleeve.

[0008] In order to prevent the sealing sleeve from being pushed out from the inside of the connecting sleeve when the gas connector applies extrusion pressure to the sealing sleeve when the inside of the connecting sleeve is docked with the gas connector, as a pull-out resistant metal gas bellows of the utility model, preferably, a limiting ring is fixedly installed on the end of the connecting sleeve away from the docking joint, and two annular grooves are provided on the inner wall of the connecting sleeve near one end of the limiting ring. The inner diameter of the limiting ring is smaller than the inner diameter of the connecting sleeve, and the inner diameter of the limiting ring is larger than the maximum diameter of the gas bellows.

[0009] In order to improve the sealing effect between the outer wall of the sealing sleeve and the inner wall of the connecting sleeve, and to ensure that the gas can only flow through the through hole of the sealing sleeve when flowing inside the connecting sleeve, as a pull-out resistant metal gas bellows of the utility model, preferably, two sealing rings are fixedly bonded on the outer wall of the sealing sleeve pair, and a circle of inner groove is provided on the inner wall of the central end of the sealing ring. The outer wall of each sealing ring is sealed with the corresponding annular groove, and the groove is sealed with the maximum diameter part of the gas bellows.

[0010] In order to enable the gas joint to form a sealing structure with the corresponding sealing ring connection end when it is squeezed onto the sealing ring on one side, as a pull-out resistant metal gas bellows of the utility model, preferably, the outer wall of the inner sleeve is in movably contact with the inner wall of the connecting sleeve, and the sealing ring and the connection end of the inner wall of the connecting sleeve form a sealing structure.

[0011] In order to ensure that the tail of the sealing sleeve can be effectively squeezed onto the inside of the limiting ring when the sealing sleeve is squeezed by the gas joint, and at the same time the sealing sleeve and the squeezed end of the limiting ring can also form a good sealing structure, as a pull-out resistant metal gas bellows of the utility model, preferably, the inner diameter of the sealing sleeve is smaller than the inner diameter of the limiting ring, and the outer wall of one end of the sealing sleeve is squeezed onto the inner wall of the limiting ring.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When in use, first put the connecting sleeve on the outer wall of the gas bellows, and then put the sealing sleeve on the outer wall of the gas bellows. At this time, move the connecting sleeve toward the position of the sealing sleeve, and make the connecting sleeve wrap the sealing sleeve inside it, and then install the inner sleeve inside the connecting sleeve. When in use, the joint and the gas joint will be threadedly connected. As the connection continues to deepen, the gas structure will squeeze the inner sleeve and the sealing ring to one side of the sealing sleeve. When the thrust is blocked, the gas joint, inner sleeve, sealing ring, sealing sleeve and gas bellows connection parts will all be connected in a sealed state. In this way, the device has a multi-stage sealing structure when in use, which can greatly improve the sealing safety after the gas bellows and the gas joint are connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall assembly structure of the tensile-resistant metal gas bellows.

[0016] Figure 2 This is a schematic diagram of the side cross-sectional structure of the connecting sleeve of the tensile-resistant metal gas bellows.

[0017] Figure 3 This is a schematic diagram of the left-side structural view of the sealing sleeve of the tensile-resistant metal gas bellows.

[0018] Figure 4 This is a schematic diagram of the right side structure of the sealing sleeve of the tensile-resistant metal gas bellows.

[0019] Figure 5 Schematic diagram of the annular groove structure of the tensile-resistant metal gas bellows.

[0020] In the figure: 1. Outer sleeve; 2. Gas bellows; 3. Connecting sleeve; 301. Limiting ring; 302. Annular groove; 4. Butt joint; 5. Sealing sleeve; 501. Sealing ring; 502. Inner groove; 6. Reinforcement rod; 7. Inner sleeve; 8. Sealing ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 5The utility model provides the following technical solutions: a tensile-resistant metal gas bellows, comprising an outer sleeve 1, a gas bellows 2 is sleeved inside the outer sleeve 1, a connecting sleeve 3 is sleeved at each end of the gas bellows 2, a butt joint 4 is fixedly connected to the other end of the connecting sleeve 3, and a sealing sleeve 5 is installed inside the connecting sleeve 3;

[0023] The gas bellows 2 is made of metal. Its corrugated shape increases the pipe's flexibility and elasticity. When subjected to tension, the corrugations can stretch and deform to a certain extent, thereby dispersing and absorbing external forces and reducing damage to the pipe itself.

[0024] The corrugated design of the gas bellows 2 allows the pipe to have a certain degree of elasticity in the axial direction, and can adapt to stretching and compression within a certain range;

[0025] It can be seen from this that the gas bellows 2 in this technical solution itself has an anti-pullout effect.

[0026] A reinforcing rod 6 is installed inside the opening of one side of the sealing sleeve 5. An inner sleeve 7 is also installed inside the connecting sleeve 3 on one side of the sealing sleeve 5. A sealing ring 8 is fixedly bonded to both sides of the inner sleeve 7.

[0027] When in use, the reinforcing rod 6 will be supported inside the open end of one side of the sealing sleeve 5, which can enhance the resetting effect of the sealing sleeve 5 after connection and ensure the sealing effect of the connection between the sealing sleeve 5 and the connecting sleeve 3.

[0028] Preferably, a limit ring 301 is fixedly mounted on the end of the connecting sleeve 3 away from the butt joint 4. Two annular grooves 302 are defined on the inner wall of the connecting sleeve 3 near the limit ring 301. The inner diameter of the limit ring 301 is smaller than that of the connecting sleeve 3 and larger than the maximum diameter of the gas bellows 2. Two sealing rings 501 are fixedly bonded to the outer wall of the pair of sealing sleeves 5. An inner groove 502 is defined on the inner wall of the central end of each sealing ring 501. The outer wall of each sealing ring 501 seals against the corresponding annular groove 302, and the inner groove 502 seals against the maximum diameter portion of the gas bellows 2. The inner diameter of the sealing sleeve 5 is smaller than that of the limit ring 301, and the outer wall of one end of the sealing sleeve 5 is pressed against the inner wall of the limit ring 301. The outer wall of the inner sleeve 7 is in active contact with the inner wall of the connecting sleeve 3, and the sealing ring 8 forms a sealed connection with the inner wall of the connecting sleeve 3.

[0029] During specific use, the connecting sleeve 3 is first put on the gas bellows 2, and then the sealing sleeve 5 is put on the end of the gas bellows 2. Then, the connecting sleeve 3 is moved so that the connecting sleeve 3 wraps the sealing sleeve 5 inside. When the connecting sleeve 3 and the sealing sleeve 5 are connected, the two sealing rings 501 need to be connected with the two annular grooves 302. In this way, the connecting sleeve 3 can be connected to the gas bellows 2 through the sealing sleeve 5 in a sealed structure.

[0030] At this time, install the inner sleeve 7 and the sealing ring 8 into the interior of the connecting sleeve 3, and make the inner sleeve 7 and the sealing ring 8 inside the connecting sleeve 3 close to the docking head 4;

[0031] Then connect the docking joint 4 to the gas joint. A threaded structure that is compatible with the gas joint is provided on the inner wall of the docking joint 4, so that the gas joint passes through the docking joint 4 through the threaded structure and enters the interior of the connecting sleeve 3. As the gas joint continues to penetrate deeper into the connecting sleeve 3, one end of the gas joint will be squeezed on the outer wall of the sealing ring 8, and as the gas joint penetrates deeper, it will also push the inner sleeve 7 and the sealing ring 8 closer to one end of the sealing sleeve 5. When the inner sleeve 7 and the sealing ring 8 are completely squeezed on one end of the sealing sleeve 5, the gas joint is stopped from moving further into the interior of the sealing sleeve 5. In this way, the gas joint and the gas bellows 2 can be docked through the multi-layer sealing structure, thereby improving the safety of the gas bellows 2 after docking.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tensile-resistant metal gas bellows, comprising an outer sleeve (1), a gas bellows (2) being sleeved inside the outer sleeve (1), a connecting sleeve (3) being sleeved at each end of the gas bellows (2), and a butt joint (4) being fixedly connected to the other end of the connecting sleeve (3), characterized in that: A sealing sleeve (5) is installed inside the connecting sleeve (3); A reinforcing rod (6) is installed inside an opening on one side of the sealing sleeve (5), and an inner sleeve (7) is also installed inside the connecting sleeve (3) on one side of the sealing sleeve (5). A sealing ring (8) is fixedly bonded to each of the two sides of the inner sleeve (7).

2. The tensile-resistant metal gas bellows according to claim 1, characterized in that: A limiting ring (301) is fixedly mounted on one end of the connecting sleeve (3) away from the docking joint (4), and two annular grooves (302) are provided on the inner wall of the connecting sleeve (3) near one end of the limiting ring (301).

3. The tensile-resistant metal gas bellows according to claim 2, characterized in that: The inner diameter of the limiting ring (301) is smaller than the inner diameter of the connecting sleeve (3), and the inner diameter of the limiting ring (301) is larger than the maximum diameter of the gas bellows (2).

4. The tensile-resistant metal gas bellows according to claim 1, characterized in that: Two sealing rings (501) are fixedly bonded on the outer wall of the pair of sealing sleeves (5), and an inner groove (502) is provided on the inner wall of the central end of the sealing ring (501).

5. The tensile-resistant metal gas bellows according to claim 4, characterized in that: The outer wall of each sealing ring (501) is sealed and docked with the corresponding annular groove (302), and the groove (502) is sealed and docked with the maximum diameter portion of the gas bellows (2).

6. The tensile-resistant metal gas bellows according to claim 1, characterized in that: The outer wall of the inner sleeve (7) is in movably contact with the inner wall of the connecting sleeve (3), and the connection end between the sealing ring (8) and the inner wall of the connecting sleeve (3) forms a sealing structure.

7. The tensile-resistant metal gas bellows according to claim 1, characterized in that: The inner diameter of the sealing sleeve (5) is smaller than the inner diameter of the limiting ring (301), and the outer wall of one end of the sealing sleeve (5) is pressed against the inner wall of the limiting ring (301).

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