Gas cooker connecting pipe

Abstract

The utility model discloses a gas cooker connecting pipe which comprises a metal corrugated pipe, welding joints are welded at two ends of the metal corrugated pipe, and nuts are screwed on the welding joints; the metal corrugated pipe is sleeved with a protective pipe, nuts are connected to the welding connector in a threaded mode, the nuts cover gaps in the connecting position of the metal corrugated pipe and the welding connector, and positioning grooves corresponding to the pipe ends of the protective pipe are formed in the nuts so that the protective pipe can be clamped by the two nuts which are oppositely distributed. The protective pipe is novel in structure, high in safety, long in service life, reliable in installation, detachable, replaceable, flexible and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas pipes, and in particular relates to a gas cooker connecting pipe. Background Art

[0002] In gas cookers, metal bellows have been widely used, replacing hoses made of other materials, because of their long service life, easy installation, beautiful appearance and corrosion resistance.

[0003] In an environment with heavy oil smoke, the oil smoke will have a great adverse effect on the service life of the metal bellows, so a layer of protective material is coated on the outside of the metal bellows. The assembly process of the metal bellows is: first, the metal bellows is inserted into the outer coating layer, and then two retaining rings are installed at both ends of the outer coating layer, and force is applied to deform the retaining rings to fix the outer coating layer. There are problems such as laborious disassembly and assembly, low operation efficiency, etc. Summary of the invention

[0004] The utility model aims to solve the above technical problems existing in the prior art and provides a gas cooker connecting pipe with novel structure, high safety and long service life. The protective pipe can be reliably installed, detachable and replaceable, and flexible and convenient.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A gas cooker connecting pipe comprises: a metal bellows, both ends of the metal bellows are welded with welding joints, and nuts are screwed on the welding joints; the characteristics are: a protective pipe is connected to the outer sleeve of the metal bellows, a nut is screwed on the welding joint, the nut covers the gap at the connection between the metal bellows and the welding joint, and a positioning groove corresponding to the pipe end of the protective pipe is provided on the nut, so that two nuts distributed oppositely clamp the protective pipe. The connecting pipe has a novel structure, high safety, long service life, reliable installation of the protective pipe, detachable and replaceable, flexible and convenient.

[0007] Furthermore, the welding joint is provided with a positioning convex ring corresponding to the pipe mouth of the metal bellows. The positioning convex ring is inserted into the pipe mouth of the metal bellows to achieve rapid docking of the welding joint and the metal bellows, thereby reducing the difficulty of docking and facilitating the welding and fixing of the welding joint and the metal bellows.

[0008] Furthermore, a first sealing ring is provided at one end of the welding joint near the nut. When the nut is connected to the stove pipe joint, the stove pipe joint abuts against the first sealing ring, so that the first sealing ring is deformed to seal the gap at the connection between the nut and the stove pipe joint, thereby preventing leakage at the gap and achieving good sealing performance.

[0009] Furthermore, a convex ring is provided on the welding joint, a first slot is formed between the convex ring and the nut, and the first sealing ring is embedded in the first slot. The first sealing ring is stably and reliably installed, not easy to fall off freely, easy to disassemble, easy to replace, flexible and convenient.

[0010] Furthermore, a second sealing ring is arranged in the middle hole of the nut. When the nut is connected to the stove pipe joint, the second sealing ring is sleeved on the stove pipe joint, the inner wall of the second sealing ring is in close contact with the outer wall of the stove pipe joint, and the gap between the two is very small. The second sealing ring cooperates with the first sealing ring to form a two-way sealing structure with good sealing performance.

[0011] Furthermore, a second slot is provided at one end of the middle hole of the nut, and the second sealing ring is embedded in the second slot. The second sealing ring is stably and reliably installed, is not easy to fall off freely, is easy to disassemble, is easy to replace, and is flexible and convenient.

[0012] Furthermore, the protective tube is a rubber tube or a stainless steel braided mesh sleeve. The rubber tube has good resilience, is pressure-resistant and not easy to deform, has low cost of use, and is economical and practical; the stainless steel braided mesh sleeve has good flexibility and reliable strength, making the whole tube not easy to break and having a long service life.

[0013] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0014] 1. The protective tube is easy to install, removable and replaceable, flexible and convenient. When installing, first put the protective tube on the metal bellows, then screw the nut on the welding joint, turn the nut to make the positioning groove cover the end of the protective tube, so that the two nuts distributed relatively can clamp the protective tube at the same time, limit the free movement of the protective tube, and improve the installation stability of the protective tube.

[0015] 2. The nut covers the gap between the metal bellows and the welding joint to prevent leakage from the gap and improve the sealing performance.

[0016] 3. When the nut is connected to the stove pipe joint, the stove pipe joint presses against the first sealing ring, so that the first sealing ring is deformed to seal the gap at the connection between the nut and the stove pipe joint to prevent leakage at the gap. The second sealing ring is put on the stove pipe joint, and the inner wall of the second sealing ring is in close contact with the outer wall of the stove pipe joint. The gap between the two is very small. The second sealing ring cooperates with the first sealing ring to form a two-sealing structure with good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0019] Figure 2This is a schematic diagram of the structure of the connection between the metal bellows and the welding joint in Example 1;

[0020] Figure 3 It is an enlarged schematic diagram of the connection between the metal bellows and the welding joint in Example 1;

[0021] Figure 4 This is a schematic diagram of the structure of the connection between the welding joint and the nut and the nut in Example 1;

[0022] Figure 5 It is a schematic diagram of the structure of the metal bellows in the first embodiment;

[0023] Figure 6 This is a structural schematic diagram of the butt joint between the welding joint and the first sealing ring in the first embodiment;

[0024] Figure 7 It is a structural schematic diagram of the welding joint in Example 1;

[0025] Figure 8 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0026] Fig. 9 This is a schematic diagram of the structure of the connection between the nut and the second sealing ring in the second embodiment.

[0027] In the figure: 1-metal bellows; 2-welding joint; 3-positioning convex ring; 4-protective tube; 5-nut; 6-nut; 7-positioning groove; 8-convex ring part; 9-first groove; 10-first sealing ring; 11-second groove; 12-second sealing ring. DETAILED DESCRIPTION

[0028] like Figures 1 to 7 As shown, this is an embodiment of the present utility model

[0029] A gas cooker connecting pipe comprises: a metal bellows 1 which can be made of stainless steel. Both ends of the metal bellows 1 are welded with welding joints 2. One end of the welding joint 2 is provided with a positioning convex ring 3 corresponding to the pipe opening of the metal bellows 1.

[0030] The positioning protruding ring 3 is inserted into the pipe mouth of the metal bellows 1 to achieve quick docking of the welding joint 2 and the metal bellows 1, thereby reducing the difficulty of docking and facilitating the welding and fixing of the welding joint 2 and the metal bellows 1.

[0031] The metal bellows 1 is outer-connected with a protective tube 4, which protects the metal bellows 1 and improves safety. The protective tube 4 is a rubber tube or a stainless steel braided mesh tube. The rubber tube has good resilience, is pressure-resistant and not easily deformed, has low use cost, and is economical and practical. The stainless steel braided mesh tube has good flexibility and reliable strength, making the whole tube not easy to break and having a long service life.

[0032] A nut 5 and a nut cap 6 are threadedly connected to the welding joint 2. The nut 5 is rotated to cover the gap between the metal bellows 1 and the welding joint 2 to prevent leakage at the gap and improve the sealing performance. The nut cap 6 is used to be threadedly connected to the matching stove pipe joint and can also prevent the nut 5 from sliding outward from the welding joint 2.

[0033] The nut 5 is provided with a positioning groove 7 corresponding to the pipe end of the protection tube 4. The protection tube 4 is easy to install, detachable and replaceable, flexible and convenient. When installing, the protection tube 4 is first sleeved on the metal bellows 1, and then the nut 5 is screwed on the welding joint 2, and the nut 5 is rotated to make the positioning groove 7 sleeve the pipe end of the protection tube 4, so that the two nuts 5 distributed relatively clamp the protection tube 4 at the same time, limit the free movement of the protection tube 4, and improve the installation stability of the protection tube 4, and finally the nut 6 is screwed on the welding joint 2.

[0034] A convex ring portion 8 is provided at one end of the welding joint 2 close to the nut 6 , a first groove 9 is formed between the convex ring portion 8 and the nut 6 , a first sealing ring 10 is embedded in the first groove 9 , and the thickness of the first sealing ring 10 is greater than the depth of the first groove 9 .

[0035] The first sealing ring 10 is stably and reliably installed, is not easy to fall off freely, is easy to disassemble, easy to replace, and is flexible and convenient; when the nut 6 is connected to the stove pipe joint, the stove pipe joint abuts against the first sealing ring 10, so that the first sealing ring 10 is deformed and blocks the gap at the connection between the nut 6 and the stove pipe joint, preventing leakage from occurring in the gap, and having good sealing performance.

[0036] like Figure 8 and Fig. 9 As shown, this is the second embodiment of the utility model

[0037] In the technical solution based on the first embodiment, a second slot 11 is formed at one end of the middle hole of the nut 6 , and a second sealing ring 12 is embedded in the second slot 11 .

[0038] The second sealing ring 12 is stably and reliably installed, not easy to fall off freely, simple to disassemble, easy to replace, flexible and convenient; when the nut 6 is connected to the stove pipe joint, the second sealing ring 12 is sleeved on the stove pipe joint, the inner wall of the second sealing ring 12 is in close contact with the outer wall of the stove pipe joint, and the gap between the two is very small. The second sealing ring 12 cooperates with the first sealing ring 10 to form a two-sealing structure with good sealing performance.

[0039] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the utility model to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the utility model.

Claims

1. A gas cooker connecting pipe, comprising: A metal bellows, wherein both ends of the metal bellows are welded with welding joints, and nuts are screwed on the welding joints; Features: The outer sleeve of the metal bellows is connected with a protective tube, and a nut is threaded on the welding joint. The nut covers the gap at the connection between the metal bellows and the welding joint. The nut is provided with a positioning groove corresponding to the tube end of the protective tube, so that the two nuts distributed relatively to each other clamp the protective tube.

2. A gas cooker connecting pipe according to claim 1, characterized in that: The welding joint is provided with a positioning convex ring corresponding to the pipe opening of the metal bellows.

3. The gas cooker connecting pipe according to claim 1, characterized in that: A first sealing ring is provided at one end of the welding joint close to the nut.

4. A gas cooker connecting pipe according to claim 3, characterized in that: The welding joint is provided with a convex ring portion, a first groove is formed between the convex ring portion and the nut, and the first sealing ring is embedded in the first groove.

5. The gas cooker connecting pipe according to claim 1, characterized in that: A second sealing ring is arranged in the middle hole of the nut.

6. A gas cooker connecting pipe according to claim 5, characterized in that: A second slot is formed at one end of the middle hole of the nut, and the second sealing ring is embedded in the second slot.

7. The gas cooker connecting pipe according to claim 1, characterized in that: The protective tube is a rubber tube or a stainless steel braided mesh sleeve.

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