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A stainless steel corrugated hose for connecting gas appliances

A technology for gas appliances and corrugated hoses, which is applied to hose connection devices, pipes/pipe joints/fittings, manufacturing tools, etc., can solve problems such as increasing on-site installation safety hazards, loosening of Green joint interfaces, and increasing installation costs. The effect of overcoming sealing inspection, solving technical difficulties and reducing overall cost

Active Publication Date: 2021-02-09
浙江圣字管业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: the technical requirements for girth welding are high, and leakage will occur if the girth welding is not up to standard; and welding tools need to be carried during on-site installation, which increases the safety hazards of on-site installation and increases the installation cost
[0006] In addition, the traditional interface structure mostly adopts the in-line structure. After the Green connector is inserted, it relies on the friction force between the plug-in sealing sleeves to keep locked. The connection between the green joint and the stainless steel bellows joint is loose or even separated, resulting in gas leakage

Method used

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  • A stainless steel corrugated hose for connecting gas appliances
  • A stainless steel corrugated hose for connecting gas appliances
  • A stainless steel corrugated hose for connecting gas appliances

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0039] refer to Figure 1 to Figure 5 A stainless steel corrugated pipe with an improved structure shown includes a stainless steel corrugated pipe 1, a plug-in interface and a threaded interface. The plug-in interface and the threaded interface are respectively arranged at both ends of the stainless steel bellows 1. A rotating nut 2, a reinforced snap ring 3 and a plug-in sealing ring 4, the threaded interface includes a second rotating nut 5 and a flat washer sealing ring 6, and both ends of the stainless steel bellows 1 are fastened with connections for the first rotating nut 2 and The shrinking flange 7 that is socketed by the second rotating nut 5, the outside of the stainless steel bellows 1 is wrapped with a coating layer 26 made of soft material, the fixing nut 27 is detachably connected with the first rotating nut 2, and the plug-in sealing ring 4 It is located inside the fixed nut 27 and its two ends are pressed against the fixed nut 27 and the corresponding stainles...

specific Embodiment 2

[0054] The difference from the first embodiment is that the connection between the upper connecting part 10 and the lower connecting part can be not only through threaded connection, but also through such as Figure 5 to Figure 8 The scheme shown is realized, specifically, the outer wall of the upper connecting part 10 is symmetrically provided with two arc-shaped chute 14 inclined upward along the cylindrical wall, and the upper and lower ends of each arc-shaped chute 14 are respectively provided with vertically downward The notch 15 and the sinker 16 of the notch, the bottom of the notch 15 communicate with the lower side of the lower connecting part 9, and the cylindrical wall of the lower connecting part 9 is embedded with two cylindrical pins 17 that slide with the arc-shaped chute 14, and the fixing nut 27 and the connection of the lower connecting part 9 are provided with an upwardly extending annular accommodation groove 18, the depth of the annular accommodation groove...

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Abstract

The invention relates to the field of connecting pipes for gas appliances, in particular to a stainless steel corrugated hose for connecting gas appliances, which includes a stainless steel corrugated pipe, a plug-in interface and a threaded interface. The plug-in interface includes a fixing nut, a first rotating nut, a reinforcing snap ring and Plug-in sealing ring, the threaded interface includes a second rotating nut and a flat washer sealing ring, both ends of the stainless steel bellows are tightly connected with shrinking flanges, and the outer side of the stainless steel bellows is covered with a coating made of soft materials. There is an undercut on the inner wall of the second rotating nut, which eliminates the safety risk of welding work during on-site installation; the shrinking flange after tightening has high rigidity, and it will not be twisted and deformed when the clamping force is large, which overcomes the elasticity in the traditional structure Disadvantages of the sealing performance of the material reinforced ring; there is no need to add a sealing ring near the tail hole of the first rotating nut, which reduces the use of accessories, reduces the overall cost and improves production efficiency.

Description

technical field [0001] The invention relates to the field of connecting pipes for gas appliances, in particular to a stainless steel corrugated hose for connecting gas appliances. Background technique [0002] Stainless steel bellows are widely used in the connection between gas appliances and gas pipelines. Stainless steel bellows are usually composed of three parts: the inner tube of the bellows, the rubber sleeve and the joint body. The inner pipe of the pipe is used for protection, and the joint body is arranged at the end of the inner pipe of the corrugated pipe. [0003] In the survival and manufacture of stainless steel bellows, the installation of the joint body is the most critical, and the installation form of the joint body directly affects the sealing performance of the stainless steel bellows in use. The joint body usually consists of three parts: a rotating nut, a fixed nut and a sealing ring. Between the nuts, when the gas pipeline or the gas appliance is co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L33/28F16L33/18F16L33/01F16L33/26B23P11/00
CPCB23P11/00F16L33/01F16L33/18F16L33/26F16L33/28
Inventor 胡熙存张申正
Owner 浙江圣字管业股份有限公司
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