A type of anti-backflow internal and external thread electrical connector structure

Abstract

This utility model relates to a backflow-proof internal and external threaded electrical insulator structure, belonging to the field of gas pipeline electrical insulators. It includes an internal and external threaded electrical insulator body (1), within which a water-stopping mechanism (2) is provided. The water-stopping mechanism (2) includes a first sealing ring (3), a second sealing ring (4), a support frame (5), and a water-stopping ball (6). The water-stopping ball (6) is located inside the support frame (5). The bottom of the outer wall of the support frame (5) is provided with the first sealing ring (3), and the bottom of the inner wall of the support frame (5) is provided with the second sealing ring (4). The first sealing ring (3) is connected to a threaded pipe (11), and the second sealing ring (4) is connected to the water-stopping ball (6). This structure prevents water in the water system from flowing back into the gas pipeline through the joint without reducing the gas flow rate.

Description

Technical Field

[0001] This utility model belongs to the field of gas pipeline electrical isolation joints. Specifically, this utility model relates to a non-return water type internal and external thread electrical isolation joint structure. Background Technology

[0002] Existing electrical isolation connectors use a fully internal, through-hole design. While this achieves electrical isolation, its fluid channel is directly connected to the gas pipeline. This can allow water from the water system to backflow into the gas pipeline system, potentially damaging the pipes throughout the entire building. When back pressure occurs inside the gas water heater, water may seep back into the gas pipeline along the through-hole, causing liquid water accumulation in the gas delivery pipeline. This not only affects gas combustion efficiency but may also corrode pipe joints. Furthermore, existing through-hole structures lack a physical isolation layer, relying solely on insulation materials for electrical isolation. Over long-term use, if the insulation layer ages due to temperature changes or mechanical stress, it may simultaneously pose a dual risk of electrical leakage and gas leaks.

[0003] Chinese patent CN220771405U, published on April 12, 2024, discloses a water inlet connector and a gas water heater. The water inlet connector includes a connector body, within which a water passage is formed and an integrated component rotatably connected. The integrated component includes a frame body, on which a rotating shaft groove and multiple balancing grooves are provided. Each of the balancing grooves and the rotating shaft groove are located on the same circumference, and the sum of the areas of the multiple balancing grooves is equal to the area of ​​the rotating shaft groove. However, this patent cannot solve the problem of water flowing back into the gas pipe through the connector without reducing the gas flow rate. Utility Model Content

[0004] The present invention aims to provide a non-returning water type internal and external wire insulating connector structure that does not reduce the gas flow.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A backflow-proof type internal and external thread electrical connector structure includes an internal and external thread electrical connector body, wherein a water-stopping mechanism is provided within the internal and external thread electrical connector body.

[0007] The water-stopping mechanism includes a first sealing ring, a second sealing ring, a support frame, and a water-stopping ball. The water-stopping ball is located inside the support frame. The bottom of the outer wall of the support frame is provided with a first sealing groove, and the bottom of the inner wall of the support frame is provided with a second sealing groove. The first sealing ring is located inside the first sealing groove, and the second sealing ring is located inside the second sealing groove. The second sealing ring and the water-stopping ball are in contact.

[0008] The support frame includes a support rod and a base. The support rod is disposed on the base. The first sealing groove is disposed on the outer wall of the base, and the second sealing groove is disposed on the inner wall of the base.

[0009] The body of the internal and external threaded electrical connector includes a threaded tube and a support tube, the support tube and the threaded tube are connected, the support rod is located inside the support tube, the base is located inside the threaded tube, and the first sealing ring is connected to the inner wall of the threaded tube.

[0010] The top of the support tube is connected to a connecting column, and the connecting column is equipped with a dust cover.

[0011] The outer wall of the support tube is provided with a first protrusion, the outer wall of the connecting column is provided with a second protrusion, the outer wall of the connecting column is provided with a bolt head, the dust cover is provided at one end of the bolt head, one end of the inner wall of the bolt head is provided with a first groove that mates with the first protrusion, and the other end of the inner wall of the bolt head is provided with a second groove that mates with the second protrusion.

[0012] The base is provided with a retaining ring for the hole.

[0013] The retaining ring for the hole is arc-shaped, the support rod is L-shaped, the base is circular, and multiple sets of support rods are provided.

[0014] The first sealing ring is an O-ring, the second sealing ring is an O-ring, the dust cover is a circular cover, the first groove, the second groove, the first protrusion and the second protrusion are all fan-shaped, and multiple sets of the first groove, the second groove, the first protrusion and the second protrusion are provided.

[0015] The inner thread end of the inner and outer thread electrical connector body is connected to the air inlet end of the water heater, or the inner thread end of the inner and outer thread electrical connector body is connected to the water outlet end of the water heater.

[0016] The technical effects of this utility model are as follows: When the anti-backflow internal and external threaded electrical connector is connected to the air inlet of the water heater, the anti-backflow ball will float upwards when the gas flows from bottom to top, thus not reducing the gas flow rate; when the anti-backflow internal and external threaded electrical connector is connected to the water outlet of the water heater, the anti-backflow ball will fall downwards when the water flows from top to bottom. The first sealing ring connects to the inner wall of the threaded pipe, and the second sealing ring connects to the anti-backflow ball, thus sealing the pipe and preventing water from flowing into the gas pipe. This prevents water in the water circuit from flowing back into the gas pipe through the connector, while not reducing the gas flow rate; the protective cover serves as a dustproof layer, and the first and second protrusions respectively cooperate with the groove to fix the bolt head. The hole is reinforced with a retaining ring to prevent the anti-backflow mechanism from sliding. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1This is a schematic diagram of a non-return water type internal and external wire electrical connector.

[0019] Figure 2 for Figure 1 The front view.

[0020] Figure 3 for Figure 1 Schematic diagram of the water-stopping mechanism and the retaining ring for the hole.

[0021] Figure 4 for Figure 3 Axonometric drawing.

[0022] Figure 5 for Figure 3 A cross-sectional view of the water-stopping mechanism.

[0023] Figure 6 This is a schematic diagram of the assembly of the internal and external threaded electrical connector body and the bolt head.

[0024] Figure 7 for Figure 6 Schematic diagram of the head structure of the bolt.

[0025] Figure 8 for Figure 7 Top view.

[0026] The markings in the diagram are as follows: 1. Body of the internal and external threaded electrical connector; 2. Water-stopping mechanism; 3. First sealing ring; 4. Second sealing ring; 5. Support frame; 6. Water-stopping ball; 7. First sealing groove; 8. Second sealing groove; 9. Support rod; 10. Base; 11. Threaded pipe; 12. Support pipe; 13. Dust cover; 14. Connecting post; 15. First protrusion; 16. Second protrusion; 17. Bolt head; 18. First groove; 19. Hole retaining ring; 20. Second groove. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation.

[0028] like Figure 1 and Figure 2 As shown, a water-proof internal and external threaded electrical connector structure includes an internal and external threaded electrical connector body 1, and a water-stopping mechanism 2 is provided inside the internal and external threaded electrical connector body 1. By incorporating the water-stopping mechanism 2 inside the internal and external threaded electrical connector body 1, water is prevented from flowing into the gas pipeline without reducing the gas flow rate.

[0029] like Figure 3 , Figure 4 and Figure 5As shown, the water-stopping mechanism 2 includes a first sealing ring 3, a second sealing ring 4, a support frame 5, and a water-stopping ball 6. The water-stopping ball 6 is located inside the support frame 5. The bottom of the outer wall of the support frame 5 is provided with a first sealing groove 7, and the bottom of the inner wall of the support frame 5 is provided with a second sealing groove 8. The first sealing ring 3 is located inside the first sealing groove 7, and the second sealing ring 4 is located inside the second sealing groove 8. The second sealing ring 4 and the water-stopping ball 6 are in contact.

[0030] The water-stop ball 6 is installed inside the support frame 5. The bottom inner wall of the support frame 5 is provided with a second sealing groove 8. The second sealing groove 8 is provided with a second sealing ring 4, which contacts the water-stop ball 6 through the second sealing ring 4.

[0031] The support frame 5 includes a support rod 9 and a base 10. The support rod 9 is mounted on the base 10. A first sealing groove 7 is located on the outer wall of the base 10, and a second sealing groove 8 is located on the inner wall of the base 10. Multiple sets of support rods 9 confine the water-stop ball 6 within the support frame 5. The outer wall of the base 10 has a first sealing groove 7, and a first sealing ring 3 is mounted on the first sealing groove 7. When the anti-backflow internal and external threaded electrical connector 1 is connected to the air inlet of the water heater, the water-stop ball 6 will float upwards when gas flows from bottom to top, preventing a reduction in gas flow. When the anti-backflow internal and external threaded electrical connector 1 is connected to the water outlet of the water heater, the water-stop ball 6 will fall downwards when water flows from top to bottom. The first sealing ring 3 connects to the inner wall of the threaded pipe 11, and the second sealing ring 4 connects to the water-stop ball 6, providing a seal and preventing water from flowing into the gas pipeline. This prevents water in the water circuit from flowing back into the gas pipeline through the connector, while maintaining the gas flow rate.

[0032] The internal and external threaded electrical connector body 1 includes a threaded tube 11 and a support tube 12, which are connected. A support rod 9 is located inside the support tube 12, and a base 10 is located inside the threaded tube 11. A first sealing ring 3 is connected to the inner wall of the threaded tube 11. The internal and external threaded electrical connector body 1 includes a threaded tube 11 and a support tube 12. The support tube 12 is cylindrical, and the threaded tube 11 has external threads for connecting to a gas pipeline.

[0033] The top of the support tube 12 is connected to a connecting post 14, and the connecting post 14 is equipped with a dust cover 13. The connecting post 14 is cylindrical, and the dust cover 13 is circular.

[0034] like Figure 6 , Figure 7 and Figure 8As shown, the outer wall of the support tube 12 has a first protrusion 15, the outer wall of the connecting column 14 has a second protrusion 16, the outer wall of the connecting column 14 has a bolt head 17, a dust cover 13 is provided at one end of the bolt head 17, one end of the inner wall of the bolt head 17 has a first groove 18 that mates with the first protrusion 15, and the other end of the inner wall of the bolt head 17 has a second groove 20 that mates with the second protrusion 16. The outer wall of the support tube 12 has a fan-shaped first protrusion 15, the outer wall of the connecting column 14 has a fan-shaped second protrusion 16, and the inside of the bolt head 17 has fan-shaped grooves 18 that mate with the first protrusion 15 and the second protrusion 16 respectively. The inner and outer threaded electrical connector body 1 and the bolt head 17 are fixed by the grooves 18 mate with the first protrusion 15 and the second protrusion 16.

[0035] The base 10 is provided with a retaining ring 19 for the hole. The retaining ring 19 is arc-shaped and serves to prevent the water-stopping mechanism 2 from sliding.

[0036] The retaining ring 19 for the hole is arc-shaped, the support rod 9 is L-shaped, and the base 10 is circular. Multiple sets of support rods 9 are provided. In this embodiment, six sets of support rods 9 are provided to form a support frame 5 with the base 10, preventing the water-stop ball 6 from leaving the threaded pipe 11 or the support pipe 12 and thus failing to achieve a sealing function.

[0037] The first sealing ring 3 is an O-ring, the second sealing ring 4 is an O-ring, the dust cover 13 is a circular cover, and the first groove 18, the second groove 20, the first protrusion 15, and the second protrusion 16 are all fan-shaped, with multiple sets of the first groove 18, the second groove 20, the first protrusion 15, and the second protrusion 16. The first sealing ring 3, being an O-ring, better fits the inner wall of the threaded pipe 11, and the second sealing ring 4, being an O-ring, better fits the water-stop ball 6.

[0038] The internal thread end of the internal threaded electrical connector body 1 is connected to the air inlet of the water heater or to the water outlet of the water heater. When the anti-backflow internal threaded electrical connector 1 is connected to the air inlet of the water heater, the anti-backflow ball 6 will float upwards when the gas flows from bottom to top, thus preventing a reduction in the gas flow rate. When the anti-backflow internal threaded electrical connector 1 is connected to the water outlet of the water heater, the anti-backflow ball 6 will fall downwards when the water flows from top to bottom.

[0039] The working principle of this utility model is as follows: A non-returning water-resistant internal and external thread electrical connector structure includes an internal and external thread electrical connector body 1. A water-stopping mechanism 2 is provided inside the body 1. The water-stopping mechanism 2 includes a first sealing ring 3, a second sealing ring 4, a support frame 5, and a water-stopping ball 6. The support frame 5 includes a support rod 9 and a base 10. The support rod 9 is disposed on the base 10, and the water-stopping ball 6 is disposed inside the support frame 5. A first sealing groove 7 is provided on the outer wall of the base 10, and a second sealing groove 8 is provided on the inner wall of the base 10. The first sealing ring 3 is disposed in the first sealing groove 7, and the second sealing ring 4 is disposed in the second sealing groove 8. The second sealing ring 4 and the water-stopping ball 6 are connected. The first sealing groove 7 is located on the outer wall of the base 10, and the second sealing groove 8 is located on the inner wall of the base 10. The internal and external thread electrical connector body 1 includes a threaded tube 11 and a support tube 12. The support tube 12 and the threaded tube 11 are connected. The support rod 9 is disposed inside the support tube 12, and the base 10 is disposed inside the threaded tube 11. The first sealing ring 3 is connected to the inner wall of the threaded tube 11. A connecting post 14 is connected to the top of the support tube 12, and a dust cover 13 is provided on the connecting post 14. A first protrusion 15 is provided on the outer wall of the support tube 12, and a second protrusion 16 is provided on the outer wall of the connecting post 14. A bolt head 17 is provided on the outer wall of the connecting post 14, and the dust cover 13 is located at the end of the bolt head 17. The inner wall of the bolt head 17 is provided with grooves 18 that mate with the first protrusion 15 and the second protrusion 16. A retaining ring 19 for holes is provided under the base 10. When the anti-backflow internal and external threaded electrical connector 1 is connected to the gas inlet of the water heater, the water-stop ball 6 will float upwards when the gas flows from bottom to top, thus preventing a reduction in the gas flow rate. When the anti-backflow internal and external threaded electrical connector 1 is connected to the water outlet of the water heater, the water-stop ball 6 will fall downwards when the water flows from top to bottom. The first sealing ring 3 connects to the inner wall of the threaded pipe 11, and the second sealing ring 4 connects to the water-stop ball 6, thus providing a seal and preventing water from flowing into the gas pipeline, preventing water in the water circuit from backflowing into the gas pipeline through the connector.

[0040] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A water-proof internal and external threaded electrical connector structure, characterized in that: The device includes an inner and outer wire electrical connector body (1), and a water-stopping mechanism (2) is provided inside the inner and outer wire electrical connector body (1). The water-stopping mechanism (2) includes a first sealing ring (3), a second sealing ring (4), a support frame (5), and a water-stopping ball (6). The water-stopping ball (6) is located inside the support frame (5). The bottom of the outer wall of the support frame (5) is provided with a first sealing groove (7), and the bottom of the inner wall of the support frame (5) is provided with a second sealing groove (8). The first sealing ring (3) is located inside the first sealing groove (7), and the second sealing ring (4) is located inside the second sealing groove (8). The second sealing ring (4) and the water-stopping ball (6) are in contact.

2. The non-return water type inner and outer conductor electrically isolated joint structure according to claim 1, characterized in that: The support frame (5) includes a support rod (9) and a base (10). The support rod (9) is located on the base (10). The first sealing groove (7) is located on the outer wall of the base (10), and the second sealing groove (8) is located on the inner wall of the base (10).

3. The non-return water type inner and outer conductor electrically isolated joint structure according to claim 2, characterized in that: The inner and outer wire electrical connector body (1) includes a threaded tube (11) and a support tube (12), the support tube (12) and the threaded tube (11) are connected, the support rod (9) is located inside the support tube (12), the base (10) is located inside the threaded tube (11), and the first sealing ring (3) is connected to the inner wall of the threaded tube (11).

4. The non-return water type inner and outer conductor electrically isolated joint structure according to claim 3, characterized in that: The top of the support tube (12) is connected to a connecting column (14), and a dust cover (13) is provided on the connecting column (14).

5. The non-return water type inner and outer conductor electrically isolated joint structure according to claim 4, characterized in that: The outer wall of the support tube (12) is provided with a first protrusion (15), the outer wall of the connecting column (14) is provided with a second protrusion (16), the outer wall of the connecting column (14) is provided with a bolt head (17), the dust cover (13) is provided at one end of the bolt head (17), one end of the inner wall of the bolt head (17) is provided with a first groove (18) that cooperates with the first protrusion (15), and the other end of the inner wall of the bolt head (17) is provided with a second groove (20) that cooperates with the second protrusion (16).

6. A water-check internal and external conductor joint structure according to any one of claims 2-5, characterized in that: The base (10) is provided with a retaining ring (19) for holes.

7. The non-return water type inner and outer conductor electrically isolated joint structure according to claim 6, characterized in that: The retaining ring (19) for the hole is arc-shaped, the support rod (9) is L-shaped, the base (10) is circular, and multiple sets of the support rod (9) are provided.

8. The non-return water type inner and outer conductor electrically isolated joint structure according to claim 5, characterized in that: The first sealing ring (3) is an O-ring, the second sealing ring (4) is an O-ring, the dust cover (13) is a circular cover, the first groove (18), the second groove (20), the first protrusion (15) and the second protrusion (16) are all fan-shaped, and the first groove (18), the second groove (20), the first protrusion (15) and the second protrusion (16) are all arranged in multiple sets.

9. The non-return water type inner and outer conductor electrically isolated joint structure according to any one of claims 1-5, characterized in that: The inner thread end of the inner and outer thread electrical connector body (1) is connected to the air inlet end of the water heater or the inner thread end of the inner and outer thread electrical connector body (1) is connected to the water outlet end of the water heater.

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