Gas meter connector connected with gas outlet connector of gas meter

Abstract

The utility model discloses a gas meter joint connected with a gas outlet joint of a gas meter, which comprises a connecting pipe and a nut, the upper end of the connecting pipe is provided with external threads, the nut is rotatably connected to the lower end of the connecting pipe, and the lower end face of the connecting pipe is provided with a sealing ring; a sealing seat is fixedly arranged at the middle upper part of the inner side of the connecting pipe, and is provided with an up-and-down communicated opening; a limiting groove is formed in an opening in the top end of the connecting pipe, a limiting connecting part is detachably connected in the limiting groove, a guide limiting hole penetrating through the upper end and the lower end of the limiting connecting part is formed in the center of the limiting connecting part, and a plurality of vent holes are evenly distributed in the periphery of the guide limiting hole; a guide rod in clearance fit with the guide limiting hole is arranged in the guide limiting hole; a closed circular plate is arranged at the bottom of the guide rod; and the inner diameter of the connecting pipe > the outer diameter of the closed disc > the inner diameter of the opening of the sealing seat > the inner diameter of the guide limiting hole. Compressed air and tap water can be prevented from flowing backwards, and mains supply is prevented from entering the gas meter accidentally; the device has the advantages of simple structure, low cost and convenience in installation.

Description

Technical Field

[0001] The utility model relates to the technical field of meter joints, in particular to a gas meter joint connected with a gas meter gas outlet joint. Background Art

[0002] Gas is a general term for gaseous fuels, which can burn and release heat for use by urban residents and industrial enterprises. It is a commonly used energy source in people's daily lives. The gas meter can be connected to the gas transmission pipeline to count the amount of gas passing through the gas meter. A common gas meter connector includes a connecting pipe, the lower end of which can be rotatably connected to a nut, and the connecting pipe is screwed onto the gas meter through the internal thread on the nut. For example, a Chinese patent document discloses a "gas meter connector" (publication number CN202676227U, publication date January 16, 2013).

[0003] In actual use, when users use gas stoves with high heat load, compressed air is used to induce gas mixed combustion. The compressed air pressure is higher than the gas pressure. When the stove fails, compressed air can easily enter the gas system and damage the gas facilities, causing an explosion in serious cases.

[0004] In actual use, there are also cases where users mistakenly cross-connect water pipes and gas pipes when repairing or replacing water heaters. The tap water pressure is much higher than the gas pressure, and tap water can easily enter the gas system, causing large-scale gas outages and damage to gas facilities. After the gas system is flooded, drainage is difficult and costly, and it is easy to cause secondary accidents.

[0005] In order to solve the above problem, a gas meter connector connected to a gas meter outlet connector is provided, wherein the gas meter connector has a function of preventing compressed air and tap water from flowing back. Summary of the invention

[0006] The utility model aims to provide a gas meter connector which is simple in structure, low in cost, easy to install and can prevent backflow of compressed air and tap water and is connected to the gas meter outlet connector in view of the deficiencies in the prior art.

[0007] The technical purpose of the utility model is achieved through the following technical solutions:

[0008] A gas meter connector connected to a gas meter outlet connector, comprising a connecting pipe and a nut, wherein the upper end of the connecting pipe is provided with an external thread, and the nut is rotatably connected to the lower end of the connecting pipe, a sealing ring is provided on the lower end surface of the connecting pipe, a sealing seat is fixedly provided on the middle and upper part of the inner side of the connecting pipe, and the sealing seat has an opening connected up and down; a limiting groove is provided at the top opening of the connecting pipe, a limiting connection part is detachably connected in the limiting groove, a guide limiting hole passing through the upper and lower ends of the limiting connection part is provided at the center of the limiting connection part, and a plurality of ventilation holes are evenly distributed around the guide limiting hole; a guide rod is provided in the guide limiting hole which is clearance-matched with the guide limiting hole, and a closed circular plate for closing the opening is provided at the bottom of the guide rod; the inner diameter of the connecting pipe is greater than the outer diameter of the closed circular disk, the inner diameter of the opening, and the inner diameter of the guide limiting hole.

[0009] The limiting connecting part includes an annular connecting part which is interference-connected with the limiting groove, a guide cylinder provided with a guide limiting hole, and an annular guide part arranged under the connecting part; the inner side of the connecting part is interconnected by a plurality of connecting sections which are evenly distributed on the outer side of the guide cylinder, and a plurality of vents are formed between the connecting sections; the inner diameter of the connecting part is smaller than the inner diameter of the connecting tube; the outer diameter of the guide part is smaller than the inner diameter of the connecting tube, and the guide part and the connecting tube are clearance-matched.

[0010] The lower end of the closed circular plate is provided with a cylindrical protrusion which matches the gap of the opening.

[0011] The lower end of the closed circular plate is provided with a conical boss matched with the opening.

[0012] The sealing seat is provided with an inner inclined surface matched with the conical boss.

[0013] The position-limiting connection part, the guide rod and the closed circular plate are made of rubber.

[0014] An annular protrusion is provided at the lower part of the outer side of the connecting pipe, and the inner diameter of the nut is larger than the outer diameter of the annular protrusion; a limiting part is provided at the top of the nut, and the limiting part is provided with a through hole whose inner diameter is larger than the outer diameter of the connecting pipe; an internal thread is provided at the lower part of the inner side of the nut;

[0015] The through hole of the limiting part is clearance-matched with the outer wall of the connecting pipe, and the outer side of the annular protrusion of the connecting pipe is clearance-matched with the inner side of the nut; an insulating component is provided in the gap between the connecting pipe and the nut.

[0016] The insulating component is made of elastic insulating material and is an insulating sleeve, which includes an insulating component upper section that cooperates with the outer wall of the connecting tube, an insulating component middle section that cooperates with the upper side of the annular protrusion, and an insulating component lower section that cooperates with the outer side of the annular protrusion.

[0017] The height of the upper section of the insulating component is greater than or equal to the thickness of the limiting portion, and the height of the lower section of the insulating component is greater than or equal to the thickness of the annular protrusion; after the insulating component is installed, the lower section of the insulating component is fitted onto the outside of the annular protrusion, and the bottom side of the lower section of the insulating component abuts against the upper side of the sealing ring.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model includes a connecting pipe and a nut. The upper end of the connecting pipe is provided with an external thread. The nut can be rotatably connected to the lower end of the connecting pipe. A sealing ring is provided on the lower end surface of the connecting pipe. A sealing seat is fixedly provided at the middle and upper part of the inner side of the connecting pipe, and the sealing seat has an opening connected to the upper and lower parts. A limiting groove is provided at the top opening of the connecting pipe. A limiting connection part can be detachably connected in the limiting groove. A guide limiting hole running through the upper and lower ends of the limiting connection part is provided at the center of the limiting connection part. A plurality of vents are evenly distributed around the guiding limiting hole. A guide rod is provided in the guiding limiting hole to match the gap therewith. A closed circular plate is provided at the bottom of the guiding rod to close the opening. The inner diameter of the connecting pipe> the outer diameter of the closed circular plate> the inner diameter of the opening> the inner diameter of the guiding limiting hole. The utility model has the advantages of simple structure, low cost, easy installation, and can prevent compressed air and tap water from flowing back.

[0020] 2. The position-limiting connection part and the position-limiting groove of the utility model are detachably connected, which facilitates the installation of the position-limiting connection part and the installation of the guide part and the closed circular plate.

[0021] 3. The position-limiting connection part of the utility model comprises an annular connection part which is interference-connected with the position-limiting groove, a guide cylinder provided with a guide position-limiting hole, and an annular guide part arranged under the connection part. By arranging the guide part under the connection part, the position-limiting connection part can be more stably arranged in the connection pipe during installation and use.

[0022] 4. The lower end of the closed circular plate of the utility model is provided with a cylindrical protrusion that matches the gap of the opening. By providing the cylindrical protrusion that matches the gap of the opening at the lower end of the closed circular plate, the sealing effect of the closed circular plate can be effectively improved when closing the opening.

[0023] 5. The lower end of the closed circular plate of the utility model is provided with a conical boss that matches the opening, and the sealing seat is provided with an inner inclined surface that matches the conical boss. By providing the conical boss at the lower end of the closed circular plate and providing the inner inclined surface that matches the conical boss on the sealing seat, the sealing effect of the closed circular plate can be effectively improved when closing the opening.

[0024] 6. The lower part of the outer connecting tube of the utility model is provided with an annular protrusion, and the inner diameter of the nut is larger than the outer diameter of the annular protrusion; the top of the nut is provided with a limiter, and the limiter is provided with a through hole with an inner diameter larger than the outer diameter of the connecting tube; the lower part of the inner side of the nut is provided with an internal thread; the through hole of the limiter and the outer wall of the connecting tube are gap-matched, and the outer side of the annular protrusion of the connecting tube and the inner side of the nut are gap-matched; an insulating component is provided in the gap between the connecting tube and the nut. By providing the insulating component, the utility model has the function of isolating from the mains power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 yes Figure 1 A cross-sectional view of

[0027] Figure 3 yes Figure 1 A cross-sectional view of the middle connecting pipe;

[0028] Figure 4 yes Figure 1 Structural schematic diagram of the middle limit connection part, the closed circular plate and the guide column;

[0029] Figure 5 It is a structural schematic diagram of a limit connection part;

[0030] Figure 6 It is another structural schematic diagram of the closed circular plate and the guide column;

[0031] Figure 7 yes Figure 1 A schematic diagram of the structure of the insulating component;

[0032] Figure 8 yes Figure 1 A schematic diagram of the structure of the middle nut;

[0033] Fig. 9 It is another structural schematic diagram of the utility model;

[0034] Fig.10 yes Fig. 9 A cross-sectional view of the middle connecting pipe;

[0035] Fig.11 yes Fig. 9 A schematic diagram of the structure of the closed circular plate and the guide column;

[0036] Reference numerals: 1—connecting pipe; 11—limiting groove; 12—annular protrusion; 13—sealing seat; 131—opening; 132—inner inclined surface; 14—sealing ring;

[0037] 2—nut; 21—limiting portion; 22—through hole;

[0038] 3—limiting connection part; 31—connecting part; 32—guide cylinder; 33—guide part; 34—connecting section; 301—guide limiting hole; 302—vent hole;

[0039] 4—Guide rod;

[0040] 5—closed circular plate; 51—cylindrical protrusion; 52—conical boss;

[0041] 6—insulating component; 61—upper section of insulating component; 62—middle section of insulating component; 63—lower section of insulating component. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] like Figure 1 — Fig.11As shown, a gas meter connector connected to a gas meter outlet connector comprises a connecting pipe 1 and a nut 2, the upper end of the connecting pipe 1 is provided with an external thread, the nut 2 is rotatably connected to the lower end of the connecting pipe 1, and a sealing ring 14 is provided on the lower end surface of the connecting pipe 1; a sealing seat 13 is fixedly provided at the middle and upper part of the inner side of the connecting pipe 1; and the sealing seat 13 has an opening 131 connected up and down; a limiting groove 11 is provided at the top opening of the connecting pipe 1, and a limiting connection part 3 is detachably connected in the limiting groove 11, and a guide limiting hole 301 penetrating through the upper and lower ends of the limiting connection part 3 is provided at the center thereof, and a plurality of vent holes 302 are evenly distributed around the guide limiting hole 301; a guide rod 4 is provided in the guide limiting hole 301 which is clearance-matched therewith, and a closed circular plate 5 which closes the opening 131 is provided at the bottom of the guide rod 4; the inner diameter of the connecting pipe 1>the outer diameter of the closed circular plate 5>the inner diameter of the opening 131>the inner diameter of the guide limiting hole 301. In actual use, the basic size of the gas meter connector remains unchanged, and the original basic connection function between the gas meter and the gas pipeline remains unchanged. Improvements are made inside the gas meter connector so that the gas meter connector can match new and old gas meters. The upper end of the gas meter connector is connected to the gas outlet pipe, and the lower end is connected to the gas meter outlet connector. The closed circular plate 5 is used to close or open the opening 131 in the middle of the sealing seat 13. When the gas meter is working normally, natural gas enters from one end of the gas meter outlet connector, and the natural gas pushes the closed circular plate 5 to move upward, open the opening 131, and enter the gas outlet pipe. When compressed air and tap water are backflowing, the closed circular plate 5 moves downward to close the opening 131, thereby preventing compressed air and tap water from backflowing into the gas meter, and then preventing compressed air and tap water from backflowing into the gas system. The adoption of this technical measure has the advantages of simple structure, low cost, easy installation, and the ability to prevent compressed air and tap water from backflowing.

[0046] like Figure 2 , Figure 3 , Figure 4 As shown, a sealing seat 13 is fixedly provided at the middle and upper part of the inner side of the connecting tube 1; a limiting groove 11 is provided at the top opening of the connecting tube 1, and a limiting connection part 3 is detachably connected in the limiting groove 11. Specifically, a limiting groove 11 with an inner diameter larger than the inner diameter of the connecting tube 1 is provided at the top opening of the connecting tube 1; threaded connection, interference connection, etc. can be adopted between the limiting connection part 3 and the limiting groove 11. The adoption of this technical measure facilitates the installation of the limiting connection part 3 and the installation of the guide part 33 and the closed circular plate 5. In actual use, the limiting groove 11 can also be an annular groove opened at the upper inner side of the connecting tube 1, and the limiting connection part 3 has an annular protrusion that cooperates with the annular groove. The limiting connection part 3 is made of elastic material and is clamped in the annular groove.

[0047] like Figure 5As shown, a guide limit hole 301 is provided at the center of the limit connection part 3, which passes through the upper and lower ends thereof, and four vent holes 302 are evenly distributed around the guide limit hole 301. Figure 4 As shown, in actual use, the limiting connection part 3 can also be formed by connecting multiple parts to each other. Specifically, the limiting connection part 3 includes an annular connection part 31 that is interference-connected with the limiting groove 11, a guide cylinder 32 provided with a guide limiting hole 301, and an annular guide part 33 arranged under the connection part 31; the inner side of the connection part 31 is connected to each other through multiple connecting sections 34 that are evenly distributed on the outer side of the guide cylinder 32, and multiple vents 302 are formed between the connecting sections 34; the inner diameter of the connection part 31 is smaller than the inner diameter of the connecting pipe 1; the outer diameter of the guide part 33 is smaller than the inner diameter of the connecting pipe 1, and the guide part 33 and the connecting pipe 1 are clearance-matched. In actual use, the depth of the limiting groove 11 is the same as the height of the connection part 31. The limiting connection part 3 is made of elastic material. For example, rubber material, etc. The connection part 31 is an annular structure, the outer diameter of the connection part 31 is slightly larger than the inner diameter of the limiting groove 11, and the inner diameter of the connection part 31 is slightly smaller than the inner diameter of the connecting pipe 1. The guide portion 33 is an annular structure, and the outer diameter of the guide portion 33 is smaller than the inner diameter of the connecting tube 1, and the outer diameter of the guide portion 33 is equivalent to the inner diameter of the connecting portion 31. The overall height of the guide cylinder 32 is less than or equal to the sum of the heights of the connecting portion 31 and the guide portion 33. There are at least two connecting sections 34. At least two vents 302 are formed between the connecting sections 34. There can also be three or four connecting sections 34. By arranging the guide portion 33 under the connecting portion 31, the limiting connecting portion 3 can be more stably arranged in the connecting tube 1 during installation and use.

[0048] like Figure 2 , Figure 4 As shown, a guide rod 4 is provided in the guide limit hole 301 with a clearance fit therewith, and a closed circular plate 5 with an outer diameter larger than the inner diameter of the opening 131 is provided at the bottom of the guide rod 4; the outer diameter of the closed circular plate 5 is smaller than the inner diameter of the connecting pipe 1 and larger than the inner diameter of the guide limit hole 301. In actual use, the guide limit hole 301 of the guide cylinder 32 is a circular hole, and the guide rod 4 is a cylindrical guide rod matched with the guide limit hole 301; the guide rod 4 can move up and down in the guide limit hole 301. The outer diameter of the guide rod 4 is slightly smaller than the inner diameter of the guide limit hole 301, and the clearance fits between the two. The length of the guide rod 4 is greater than the length from the top surface of the guide cylinder 32 to the top surface of the sealing seat 13. The overall size of the closed circular plate 5 of the annular structure of the sealing seat 13 is greater than the inner diameter of the sealing seat 13, that is, the overall size of the closed circular plate 5 is greater than the opening 131 of the sealing seat 13. The guide rod 4 and the closed circular plate 5 can be made of rubber material. The closed circular plate 5 can move up and down in the connecting pipe 1 through the guide rod 4 , and its movable range is between the limiting connecting portion 3 and the sealing seat 13 .

[0049] like Figure 6As shown, the lower end of the closed circular plate 5 is provided with a cylindrical protrusion 51 that is in clearance with the opening 131. In actual use, the sealing seat 13 is an annular structure, the inner diameter of the sealing seat 13 is smaller than the inner diameter of the connecting pipe 1, and a vertically penetrating opening 131 is formed in the center thereof. By providing the cylindrical protrusion 51 that is in clearance with the opening 131 at the lower end of the closed circular plate 5, the sealing effect can be effectively improved when the closed circular plate 5 closes the opening 131.

[0050] like Fig. 9 , Fig.10 , Fig.11 As shown, the lower end of the closed circular plate 5 is provided with a conical boss 52 that matches the opening 131; the sealing seat 13 is provided with an inner inclined surface 132 that matches the conical boss 52. By providing the conical boss 52 at the lower end of the closed circular plate 5 and providing the inner inclined surface 132 that matches the conical boss 52 on the sealing seat 13, the sealing effect of the closed circular plate 5 can be effectively improved when the opening 131 is closed.

[0051] like Figure 2 , Figure 7 , Figure 8 As shown, an annular protrusion 12 is provided at the lower part of the outside of the connecting pipe 1, and the inner diameter of the nut 2 is larger than the outer diameter of the annular protrusion 12; a limiting portion 21 is provided at the top of the nut 2, and the limiting portion 21 is provided with a through hole 22 whose inner diameter is larger than the outer diameter of the connecting pipe 1; an internal thread is provided at the lower part of the inner side of the nut 2. The through hole 22 of the limiting portion 21 and the outer wall of the connecting pipe 1 are clearance-matched, and the outer side of the annular protrusion 12 of the connecting pipe 1 and the inner side of the nut 2 are clearance-matched; an insulating component 6 is provided in the gap between the connecting pipe 1 and the nut 2. The connecting pipe 1 is separated from the nut 2 by providing the insulating component 6, and at the same time, a sealing ring 14 of an insulating material is provided on the lower end surface of the connecting pipe 1. By adopting this technical measure, the utility model has the function of isolating from the mains power supply.

[0052] Specifically, the insulating component 6 is made of elastic insulating material, and the insulating component 6 is an insulating sleeve, which includes an insulating component upper section 61 that matches the outer tube wall of the connecting pipe 1, an insulating component middle section 62 that matches the upper side of the annular protrusion 12, and an insulating component lower section 63 that matches the outer side of the annular protrusion 12. In actual use, the height of the insulating component upper section 61 is greater than or equal to the thickness of the limiting portion 21, and the height of the insulating component lower section 63 is greater than or equal to the thickness of the annular protrusion 12. The insulating sleeve is inserted from the upper end of the connecting pipe 1 so that it is sleeved outside the annular protrusion 12. When the insulating sleeve is installed, the lower section of the insulating sleeve is fitted on the outer side of the annular protrusion 12, and the bottom side of the lower section of the insulating sleeve is abutted against the upper side of the sealing ring 14. The middle section of the insulating sleeve is fitted on the upper side of the annular protrusion 12, and the upper section of the insulating sleeve is fitted on the outer side of the connecting pipe 1. Then it is connected to the gas meter outlet joint through the nut 2. By adopting this technical measure, the utility model has the function of isolating from the mains power supply.

[0053] In actual use, the newly installed gas meters have been replaced with smart Internet of Things meters (smart gas meters for short), and the gas meters have integrated digital display modules and communication modules. Smart gas meters have requirements for explosion-proof, electric shock-proof, and electric field interference-proof. Terminal gas facilities are all equipped with electrical parts. When terminal gas facilities fail, there is a risk of spillover of the mains electricity, which can easily affect the normal use of smart gas meters. At present, gas companies prevent accidents from affecting smart gas meters by adding insulating pipes to the gas pipeline branches. For example, when a gas water heater fails or burns out, the mains electricity causes the user's gas system to be electrified through the gas metal pipe, affecting the normal operation of the electronic components of the smart gas meter and even damaging the gas meter. To this end, insulating pipes are added to the gas pipeline branches to make them have the function of isolating them from the mains power supply, thereby preventing accidents from affecting the smart gas meter. However, the separate installation of dedicated insulating pipes has high use costs and requires independent installation, resulting in low installation efficiency. By arranging an insulating sleeve between the connecting pipe 1 and the nut 2, the insulating sleeve plays the role of an insulating pipe fitting, so that the utility model has the function of isolating from the mains power supply, and has the advantages of simple structure, low cost and high installation efficiency.

[0054] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A gas meter connector connected to a gas meter outlet connector, comprising a connecting pipe and a nut, wherein the upper end of the connecting pipe is provided with an external thread, the nut is rotatably connected to the lower end of the connecting pipe, and a sealing ring is provided on the lower end surface of the connecting pipe, characterized in that: A sealing seat is fixedly provided at the middle and upper part of the inner side of the connecting pipe, and the sealing seat has an opening communicating with the upper and lower parts; A limiting groove is provided at the top opening of the connecting pipe, a limiting connecting part is detachably connected to the limiting groove, a guide limiting hole penetrating the upper and lower ends of the limiting connecting part is provided at the center of the limiting connecting part, and a plurality of vent holes are evenly distributed around the guide limiting hole; The guide limit hole is provided with a guide rod which is clearance-matched therewith, and the bottom of the guide rod is provided with a closed circular plate which closes the opening; the inner diameter of the connecting pipe>the outer diameter of the closed circular plate>the inner diameter of the opening>the inner diameter of the guide limit hole.

2. The gas meter connector connected to the gas meter outlet connector according to claim 1, characterized in that: The limiting connecting part includes an annular connecting part which is interference-connected with the limiting groove, a guide cylinder provided with a guide limiting hole, and an annular guide part arranged under the connecting part; the inner side of the connecting part is interconnected by a plurality of connecting sections which are evenly distributed on the outer side of the guide cylinder, and a plurality of vents are formed between the connecting sections; the inner diameter of the connecting part is smaller than the inner diameter of the connecting tube; the outer diameter of the guide part is smaller than the inner diameter of the connecting tube, and the guide part and the connecting tube are clearance-matched.

3. The gas meter connector connected to the gas meter outlet connector according to claim 1, characterized in that: The lower end of the closed circular plate is provided with a cylindrical protrusion which matches the gap of the opening.

4. The gas meter connector connected to the gas meter outlet connector according to claim 1, characterized in that: The lower end of the closed circular plate is provided with a conical boss matched with the opening.

5. The gas meter connector connected to the gas meter outlet connector according to claim 4, characterized in that: The sealing seat is provided with an inner inclined surface matched with the conical boss.

6. The gas meter connector connected to the gas meter outlet connector according to claim 1, characterized in that: The position-limiting connection part, the guide rod and the closed circular plate are made of rubber.

7. The gas meter connector connected to the gas meter outlet connector according to claim 1, characterized in that: An annular protrusion is provided at the lower part of the outer side of the connecting pipe, and the inner diameter of the nut is larger than the outer diameter of the annular protrusion; a limiting part is provided at the top of the nut, and the limiting part is provided with a through hole whose inner diameter is larger than the outer diameter of the connecting pipe; an internal thread is provided at the lower part of the inner side of the nut; The through hole of the limiting part is clearance-matched with the outer wall of the connecting pipe, and the outer side of the annular protrusion of the connecting pipe is clearance-matched with the inner side of the nut; an insulating component is provided in the gap between the connecting pipe and the nut.

8. The gas meter connector connected to the gas meter outlet connector according to claim 7, characterized in that: The insulating component is made of elastic insulating material and is an insulating sleeve, which includes an insulating component upper section that cooperates with the outer wall of the connecting tube, an insulating component middle section that cooperates with the upper side of the annular protrusion, and an insulating component lower section that cooperates with the outer side of the annular protrusion.

9. The gas meter connector connected to the gas meter outlet connector according to claim 8, characterized in that: The height of the upper section of the insulating component is greater than or equal to the thickness of the limiting portion, and the height of the lower section of the insulating component is greater than or equal to the thickness of the annular protrusion; after the insulating component is installed, the lower section of the insulating component is fitted onto the outside of the annular protrusion, and the bottom side of the lower section of the insulating component abuts against the upper side of the sealing ring.

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