Novel compression pipe for gas

Abstract

The application provides a new type of compression joint pipe for gas, belonging to the technical field of urban gas transmission and distribution. The new type of compression joint pipe for gas comprises a compression joint type carbon coated steel pipe base material, a double corrosion protection coating, a hydrogenated nitrile rubber sealing ring, a supporting mechanism and a lightning protection mechanism, one end of one compression joint type carbon coated steel pipe base material is inserted into the bottom of the socket of the other compression joint type carbon coated steel pipe base material, the hydrogenated nitrile rubber sealing ring is arranged between the two compression joint type carbon coated steel pipe base materials, the connection part of the two compression joint type carbon coated steel pipe base materials is connected through compression joint, and the double corrosion protection coating is arranged on the outer surface of the compression joint type carbon coated steel pipe base material. The new type of compression joint pipe for gas has high corrosion resistance and high sealing performance. The compression joint tool is used for connection, and the construction efficiency is high. The compression joint design reduces the aging risk of the hydrogenated nitrile rubber sealing ring, and brings better use experience to users.

Description

Technical Field

[0001] This application relates to the field of urban gas transmission and distribution technology, and more specifically, to a novel pressure pipe for gas transmission. Background Technology

[0002] The gas pipeline system from the outdoor riser to the user end is usually equipped with pipe supports, pipes, and a grounding design for lightning protection. Currently, traditional galvanized steel pipes are prone to corrosion and have poor sealing of threaded connections; PE pipes require special hot-melt equipment, resulting in low construction efficiency and making them unsuitable for exposed risers; ordinary press-fit pipe fittings pose a risk of sealing ring aging when used in gas media for a long time, leading to a poor user experience. Utility Model Content

[0003] To overcome the above shortcomings, this application provides a new type of press-fit pipe for gas, which aims to improve the problems of easy corrosion and poor sealing of threaded connections in traditional galvanized steel pipes; PE pipes require special hot-melt equipment, resulting in low construction efficiency and inability to be used for exposed risers; and ordinary press-fit pipe fittings have the risk of aging of the sealing ring when used in gas media for a long time.

[0004] This application is implemented as follows:

[0005] This application provides a novel press-fit pipe for gas applications, comprising a press-fit carbon-coated steel pipe substrate, a double anti-corrosion coating, a hydrogenated nitrile rubber sealing ring, a support mechanism, and a lightning protection mechanism. One end of one of the press-fit carbon-coated steel pipe substrates is inserted into the bottom of the socket of another press-fit carbon-coated steel pipe substrate. The hydrogenated nitrile rubber sealing ring is disposed between the two press-fit carbon-coated steel pipe substrates. The two press-fit carbon-coated steel pipe substrates are press-fitted together at the connection point. The double anti-corrosion coating is disposed on the outer surface of the press-fit carbon-coated steel pipe substrate.

[0006] The support mechanism is installed on the press-fitted carbon-coated steel pipe substrate, and the support mechanism is set up to support the press-fitted carbon-coated steel pipe substrate.

[0007] The lightning protection mechanism is installed on the press-fitted carbon-coated steel pipe substrate, and the lightning protection mechanism is set up for lightning protection.

[0008] In one embodiment of this application, the dual anti-corrosion coating is an epoxy resin layer or a polyethylene layer.

[0009] In one embodiment of this application, a stainless steel locking ring is also included, which is installed at the connection between the two press-fitted carbon-coated steel pipe substrates.

[0010] In one embodiment of this application, the support mechanism includes a U-shaped pipe clamp, a threaded rod, a rubber sleeve, a support bracket, and a nut, wherein the upper end of the threaded rod is fixed to the lower end of the U-shaped pipe clamp;

[0011] The rubber sleeve is fitted onto the double anti-corrosion coating, the U-shaped pipe clamp is fitted onto the rubber sleeve, the U-shaped pipe clamp passes through the support, and the nut is threaded onto the threaded rod.

[0012] In one embodiment of this application, a rubber pad is further included, which is placed on the upper surface of the support and the rubber pad is attached to the lower surface of the rubber sleeve.

[0013] In one embodiment of this application, the lightning protection mechanism includes an equipotential lightning protection grounding connector, a hot-dip galvanized flat steel connecting wire, and a grounding electrode. The equipotential lightning protection grounding connector is disposed on the press-fit carbon-coated steel pipe substrate, the hot-dip galvanized flat steel connecting wire is disposed between the equipotential lightning protection grounding connector and the grounding electrode, and the grounding electrode is a hot-dip galvanized angle steel.

[0014] In one embodiment of this application, the thickness of the double anti-corrosion coating is greater than or equal to 150 μm, the depth of the crimping groove between the two crimped carbon-coated steel pipe substrates is 2.2-2.5 mm, and the hydrogenated nitrile rubber sealing ring adopts a three-lip sealing ring structure.

[0015] In one embodiment of this application, the thickness of the rubber sleeve is greater than or equal to 3 mm, and the wall thickness of the press-fitted carbon-coated steel pipe substrate is greater than or equal to 2 mm.

[0016] The beneficial effects of this application are: the novel gas-use press-fit pipe obtained by the above design has high corrosion resistance and high sealing performance; the use of press-fit tools for connection improves construction efficiency; the press-fit design reduces the aging risk of hydrogenated nitrile rubber sealing rings, providing users with a better user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a novel gas-fired pressure pipe provided in an embodiment of this application;

[0019] Figure 2A diagram showing the relationship between the press-fitted carbon-coated steel pipe substrate and the stainless steel locking ring provided in the embodiments of this application;

[0020] Figure 3 A diagram showing the relationship between the press-fitted carbon-coated steel pipe substrate and the support mechanism provided in the embodiments of this application;

[0021] Figure 4 A diagram showing the relationship between the press-fitted carbon-coated steel pipe substrate and the double anti-corrosion coating provided in the embodiments of this application;

[0022] Figure 5 Provided for the implementation of this application Figure 4 Enlarged view of region A in the middle;

[0023] Figure 6 A cross-sectional view of the press-fit carbon-coated steel pipe substrate, the double anti-corrosion coating, and the hydrogenated nitrile rubber sealing ring provided for the embodiments of this application;

[0024] Figure 7 A three-dimensional structural diagram of the support mechanism provided for the embodiments of this application.

[0025] In the diagram: 110 - Press-fit carbon-coated steel pipe substrate; 120 - Double anti-corrosion coating; 130 - Stainless steel locking ring; 140 - Support mechanism; 141 - U-shaped pipe clamp; 142 - Threaded rod; 143 - Rubber sleeve; 144 - Support and hanger; 145 - Rubber pad; 146 - Nut; 150 - Lightning protection mechanism; 151 - Equipotential lightning protection grounding connector; 152 - Hot-dip galvanized flat steel connecting wire; 153 - Grounding electrode; 160 - Hydrogenated nitrile rubber sealing ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Example

[0028] Please see Figures 1-7This application provides a technical solution: a novel press-fit pipe for gas applications, comprising a press-fit carbon-coated steel pipe substrate 110, a double anti-corrosion coating 120, a hydrogenated nitrile rubber sealing ring 160, a support mechanism 140, and a lightning protection mechanism 150. One end of one press-fit carbon-coated steel pipe substrate 110 is inserted into the bottom of the socket of another press-fit carbon-coated steel pipe substrate 110. A hydrogenated nitrile rubber sealing ring 160 is provided between the two press-fit carbon-coated steel pipe substrates 110. The two press-fit carbon-coated steel pipe substrates 110 are press-fitted together. It also includes a stainless steel locking ring 130. Stainless steel locking ring 130 is installed at the connection of two press-fitted carbon-coated steel pipe substrates 110. The stainless steel locking ring 130 is insulated from the carbon steel substrate. Double anti-corrosion coating 120 is applied to the outer surface of the press-fitted carbon-coated steel pipe substrate 110. The double anti-corrosion coating 120 is an epoxy resin layer or a polyethylene layer. The thickness of the double anti-corrosion coating 120 is greater than or equal to 150μm. The depth of the crimping groove between the two press-fitted carbon-coated steel pipe substrates 110 is 2.2-2.5mm. Hydrogenated nitrile rubber sealing ring 160 adopts a three-lip sealing ring structure. The three-lip sealing ring structure is a multi-stage sealing structure.

[0029] The support mechanism 140 is installed on the press-fit carbon-coated steel pipe substrate 110. The support mechanism 140 is set to support the press-fit carbon-coated steel pipe substrate 110. The support mechanism 140 includes a U-shaped pipe clamp 141, a threaded rod 142, a rubber sleeve 143, a support bracket 144, and a nut 146. The upper end of the threaded rod 142 is fixed on the lower end of the U-shaped pipe clamp 141. The rubber sleeve 143 is fitted on the double anti-corrosion coating 120. The U-shaped pipe clamp 141 is fitted on the rubber sleeve 143. The U-shaped pipe clamp 141 passes through the support bracket 144. The nut 146 is threaded on the threaded rod 142. It also includes a rubber pad 145. The rubber pad 145 is placed on the upper surface of the support bracket 144 and is attached to the lower surface of the rubber sleeve 143. The thickness of the rubber sleeve 143 is greater than or equal to 3 mm. The wall thickness of the press-fit carbon-coated steel pipe substrate 110 is greater than or equal to 2 mm.

[0030] The lightning protection mechanism 150 is installed on the press-fit carbon coated steel pipe substrate 110. The lightning protection mechanism 150 is used for lightning protection. The lightning protection mechanism 150 includes an equipotential lightning protection grounding connector 151, a hot-dip galvanized flat steel connecting wire 152, and a grounding electrode 153. The equipotential lightning protection grounding connector 151 is installed on the press-fit carbon coated steel pipe substrate 110. The hot-dip galvanized flat steel connecting wire 152 is installed between the equipotential lightning protection grounding connector 151 and the grounding electrode 153. The grounding electrode 153 is a hot-dip galvanized angle steel.

[0031] This embodiment applies to the lightning protection grounding of metal gas risers and inlet pipes located within the lightning protection range of a building. The specific procedures are as follows: 1. There are two methods for connecting gas pipelines: 1) The gas pipeline is reliably connected to the building's pre-reserved lightning protection grounding terminal before exiting the ground; 2) The gas pipeline is connected to an independent device before exiting the ground; 2. When the transition resistance at pipe bends, valves, and flange connections is greater than 0.03Ω, bridging is required; flanges with no less than 5 bolts are required; in non-corrosive environments, bridging is not necessary; 3. For details on bridging procedures, refer to the national standard atlas "Equipotential Bonding Installation" 15D502-35, 15D502-36, and 15D502-37; 4. The measured impulse resistance of the grounding system is no greater than 10 ohms; key fittings: 90° elbow (curvature radius 1.5D); Equal diameter tee (with reinforced crimped boss); eccentric reducer (maintaining consistent pipe bottom elevation); sealing component: hydrogenated nitrile rubber ring (Shore hardness 70±5, gas permeability ≤0.5cm). 3 / mm 2 •d); The outer coating thickness of the pipe is ≥150μm (complies with the adhesion test in Appendix B of T / CGAS016-2021), the crimp groove depth is 2.2-2.5mm (meets both GB / T 27891-2011 and CJ / T433-2013), the seismic seal adopts a three-lip sealing ring structure (refer to Figure D.3 in Appendix D of T / CGAS 016-2021), and a 304 stainless steel locking ring (insulated from the carbon steel substrate) is added to the socket of the pipe fitting.

[0032] Specifically, the working principle of this new type of gas-use press-fit pipe is as follows: During use, a hydrogenated nitrile rubber sealing ring 160 is placed between two press-fit carbon-coated steel pipe substrates 110. The two press-fit carbon-coated steel pipe substrates 110 are connected by a press-fitting tool. Then, a stainless steel locking ring 130 is installed at the connection point of the two press-fit carbon-coated steel pipe substrates 110. A double anti-corrosion coating 120 improves the corrosion resistance of the press-fit carbon-coated steel pipe substrates 110. The hydrogenated nitrile rubber sealing ring 160 adopts a three-lip sealing ring structure. An equipotential lightning protection grounding connector is also included. The design of 151, galvanized flat steel connecting wire 152, and grounding electrode 153 is suitable for lightning protection grounding of metal gas risers and inlet pipes located within the lightning protection range of buildings. A rubber sleeve 143 is installed between the U-shaped pipe clamp 141 and the double anti-corrosion coating 120 to effectively prevent the double anti-corrosion coating 120 from being worn. This new type of gas compression fitting has high corrosion resistance and high sealing performance. It is connected using a compression tool, which increases construction efficiency. The compression design reduces the aging risk of the hydrogenated nitrile rubber sealing ring 160, providing users with a better user experience.

[0033] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A novel pressure pipe for gas supply, characterized in that, The device includes a press-fit carbon-coated steel pipe substrate (110), a double anti-corrosion coating (120), a hydrogenated nitrile rubber sealing ring (160), a support mechanism (140), and a lightning protection mechanism (150). One end of one of the press-fit carbon-coated steel pipe substrates (110) is inserted into the bottom of the socket of another press-fit carbon-coated steel pipe substrate (110). The hydrogenated nitrile rubber sealing ring (160) is provided between the two press-fit carbon-coated steel pipe substrates (110). The two press-fit carbon-coated steel pipe substrates (110) are press-fitted together at the connection point. The double anti-corrosion coating (120) is provided on the outer surface of the press-fit carbon-coated steel pipe substrate (110). The support mechanism (140) is installed on the press-fit carbon coated steel pipe substrate (110), and the support mechanism (140) is provided to support the press-fit carbon coated steel pipe substrate (110). The lightning protection mechanism (150) is installed on the press-fit carbon coated steel pipe substrate (110), and the lightning protection mechanism (150) is set up for lightning protection.

2. The novel gas-fired pressure pipe according to claim 1, characterized in that, The dual anti-corrosion coating (120) is an epoxy resin layer or a polyethylene layer.

3. A novel gas-fired pressure pipe according to claim 1, characterized in that, It also includes a stainless steel locking ring (130) installed at the joint of the two press-fitted carbon-coated steel pipe substrates (110).

4. A novel gas-fired pressure pipe according to claim 1, characterized in that, The support mechanism (140) includes a U-shaped pipe clamp (141), a threaded rod (142), a rubber sleeve (143), a support bracket (144), and a nut (146). The upper end of the threaded rod (142) is fixed to the lower end of the U-shaped pipe clamp (141). The rubber sleeve (143) is fitted onto the double anti-corrosion coating (120), the U-shaped pipe clamp (141) is fitted onto the rubber sleeve (143), the U-shaped pipe clamp (141) passes through the support (144), and the nut (146) is threaded onto the threaded rod (142).

5. A novel gas-fired pressure pipe according to claim 4, characterized in that, It also includes a rubber pad (145) placed on the upper surface of the support (144) and attached to the lower surface of the rubber sleeve (143).

6. A novel gas-fired pressure pipe according to claim 1, characterized in that, The lightning protection mechanism (150) includes an equipotential lightning protection grounding connector (151), a hot-dip galvanized flat steel connecting wire (152), and a grounding electrode (153). The equipotential lightning protection grounding connector (151) is disposed on the press-fit carbon coated steel pipe substrate (110). The hot-dip galvanized flat steel connecting wire (152) is disposed between the equipotential lightning protection grounding connector (151) and the grounding electrode (153). The grounding electrode (153) is a hot-dip galvanized angle steel.

7. A novel gas-fired pressure pipe according to claim 1, characterized in that, The thickness of the double anti-corrosion coating (120) is greater than or equal to 150μm, the depth of the crimping groove between the two crimped carbon coated steel pipe substrates (110) is 2.2-2.5mm, and the hydrogenated nitrile rubber sealing ring (160) adopts a three-lip sealing ring structure.

8. A novel gas-fired pressure pipe according to claim 4, characterized in that, The thickness of the rubber sleeve (143) is greater than or equal to 3 mm, and the wall thickness of the press-fit carbon coated steel pipe substrate (110) is greater than or equal to 2 mm.

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