A gas pipeline non-return water device

Abstract

The utility model relates to a kind of gas pipeline non-return water device, belong to gas pipeline field, including shell (1), the shell (1) side is equipped with gas outlet (2), the shell (1) other side is equipped with air inlet (3), water stop mechanism (4) is equipped between the gas outlet (2) and air inlet (3).The water stop mechanism (4) includes float bucket (5) and guide frame (6), the shell (1) bottom is equipped with base (7), the guide frame (6) bottom and base (7) are connected, the float bucket (5) is arranged in guide frame (6).When water flow enters, first float bucket (8) drives boss (12) to rise to the position of first sealing ring (15), close through-hole (13) to realize preventing water flow to enter gas pipeline, when there is no water flow, first float bucket (8) drops to, and the flow of gas will not be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of gas pipelines, specifically, it relates to a gas pipeline backflow prevention device. Background Technology

[0002] Currently, most gas-related check valves are valve-type structures, which cannot meet the requirements for use with gas pipelines outside buildings. They cannot prevent water from entering the gas pipeline without reducing the gas flow rate. Existing gas pipelines outside buildings require large-diameter check valve structures. Existing one-way check valves cannot be installed between large-diameter inlet and outlet gas pipelines, and therefore cannot effectively prevent water from entering the gas pipeline without reducing the gas flow rate.

[0003] A search revealed that a Chinese patent published on November 13, 2020, discloses a one-way check valve for a water supply system, publication number CN211924982U. The valve includes a connecting cylinder, a circular upper plate and lower plate, a spring, and a valve seat. The upper plate has multiple equidistant limit blocks at equal intervals on its inner side in the middle, and an externally threaded connecting pipe at the lower center of the upper plate. The connecting cylinder and lower plate are an integral structure, with an opening in the middle of the lower plate. Multiple guide strips are spaced at equal intervals on the inner side of the connecting cylinder. The upper end of the valve seat is tightly fitted onto the lower inner end of the spring, and the lower end of the valve seat is located within the opening in the middle of the lower plate. The upper end of the spring is located within the connecting pipe in the lower middle of the upper plate and below the multiple limit blocks. The upper plate is installed on the upper end of the connecting cylinder. This one-way check valve cannot be installed between large-diameter gas pipelines to achieve backflow prevention. Utility Model Content

[0004] The present invention aims to provide a gas pipeline backflow prevention device that can be installed in large-diameter pipes to prevent backflow.

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

[0006] A gas pipeline backflow prevention device includes a housing, an air outlet on one side of the housing, an air inlet on the other side of the housing, and a water-stopping mechanism between the air outlet and the air inlet.

[0007] The water-stopping mechanism includes a float and a guide frame. The bottom of the housing is provided with a base, the bottom of the guide frame is connected to the base, and the float is disposed inside the guide frame.

[0008] The float includes a first float and a second float, with the first float fitted onto the second float, the second float connected to the base, and the first float and the second float slidably connected.

[0009] The top of the shell is provided with a cavity, the bottom of the cavity is provided with a support plate, the top of the guide frame is connected to the support plate, the top of the first float is provided with a boss, the support plate is provided with a through hole, the air inlet is connected to a bent pipe, the bent pipe is located on one side of the cavity, the boss protrudes from the through hole, the support plate is provided with a first sealing groove, and a first sealing ring that mates with the boss is provided in the first sealing groove.

[0010] The guide frame includes a first connecting plate, a second connecting plate, and a fixing rod. The first connecting plate is mounted on the base. One end of the fixing rod is connected to the first connecting plate and is attached to the outer side of the first float. The other end of the fixing rod is connected to the second connecting plate.

[0011] The boss is provided with a second sealing groove, and a second sealing ring is provided in the second sealing groove.

[0012] The air outlet is connected to a first flange, which is connected to an air inlet pipe. The air inlet is connected to a second flange, which is connected to an air outlet pipe.

[0013] The base includes a base plate and a protrusion, and the bottom of the housing is provided with a groove that mates with the protrusion.

[0014] The base plate and the bottom of the shell are connected by bolts.

[0015] The first sealing ring is an O-ring, the second sealing ring is an O-ring, the first float and the second float are both cylindrical, the first connecting plate and the second connecting plate are both annular, the protrusions and grooves are all hexagonal, and multiple sets of fixing rods are provided.

[0016] The technical advantages of this invention are as follows: A large-sized shell allows for installation between large-diameter gas pipelines. A water-stopping mechanism is installed between the inlet and outlet to prevent water from entering the gas pipeline without reducing the gas flow. The water-stopping mechanism is installed within a guide frame via a float. The float is embedded in the inner wall of the first float via a second float, and its movement is achieved through buoyancy, resulting in lifting and lowering. When water is injected into the outlet, the first float rises to contact the first sealing ring, preventing water from entering the inlet. When there is no water, the first float descends, without affecting the gas flow. Attached Figure Description

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

[0018] Figure 1 This is a cross-sectional view of a gas pipeline backflow prevention device.

[0019] Figure 2 This is a schematic diagram of a gas pipeline backflow prevention device.

[0020] Figure 3 for Figure 2 A schematic diagram of the base and water-stopping mechanism.

[0021] Figure 4 for Figure 2 Schematic diagram of the central buoy section.

[0022] Figure 5 for Figure 3 Schematic diagram of the central boss section.

[0023] Figure 6 for Figure 1 Schematic diagram of the hollow cavity section.

[0024] The following are marked in the diagram: 1. Shell; 2. Air outlet; 3. Air inlet; 4. Water-stopping mechanism; 5. Float; 6. Guide frame; 7. Base; 8. First float; 9. Second float; 10. Cavity; 11. Support plate; 12. Boss; 13. Through hole; 14. First sealing groove; 15. First sealing ring; 16. First connecting plate; 17. Second connecting plate; 18. Fixing rod; 19. Second sealing groove; 20. Second sealing ring; 21. First flange; 22. Second flange; 23. Base plate; 24. Protrusion; 25. Groove; 26. Bend. Detailed Implementation

[0025] 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.

[0026] like Figure 1 and Figure 2 As shown, a gas pipeline backflow prevention device includes a housing 1. One side of the housing 1 has an outlet 2, and the other side has an inlet 3. A water-stopping mechanism 4 is provided between the outlet 2 and the inlet 3. The gas pipeline backflow prevention device is installed between gas pipelines through the large-sized housing 1. One side has an outlet 2 connected to an outlet pipeline, and the other side has an inlet 3 connected to an inlet pipeline. The water-stopping mechanism 4 is provided between the outlet 2 and the inlet 3 to prevent water from entering the inlet 3.

[0027] like Figure 3 As shown, the water-stopping mechanism 4 includes a float 5 and a guide frame 6. A base 7 is provided at the bottom of the housing 1. The bottom of the guide frame 6 is connected to the base 7, and the float 5 is disposed within the guide frame 6. When water flows into the air inlet 3, the first float 8 rises. The guide frame 6 controls the direction of the first float 8's rise, and the first float 8 moves vertically along the guide frame 6. When there is no water, the first float 8 descends, without affecting the gas flow rate.

[0028] like Figure 4 As shown, the float 5 includes a first float 8 and a second float 9. The first float 8 is fitted onto the second float 9, and the second float 9 is connected to the base 7. The first float 8 and the second float 9 are slidably connected. The outer wall of the second float 9 is fitted to the inner wall of the first float 8, allowing the first float 8 and the second float 9 to move along the wall. The second float 9 and the base 7 are fixed, so that when water flows in, the first float 8 rises while the second float 9 remains stationary; when there is no water flow, the first float 8 descends while the second float 9 remains stationary.

[0029] like Figure 6 As shown, the top of the shell 1 is provided with a cavity 10, the bottom of the cavity 10 is provided with a support plate 11, the top of the guide frame 6 is connected to the support plate 11, the top of the first float 8 is provided with a boss 12, the support plate 11 is provided with a through hole 13, the air inlet 3 is connected to a bent pipe 26, the bent pipe 26 is located on one side of the cavity 10, the boss 12 passes through the through hole 13, the support plate 11 is provided with a first sealing groove 14, and a first sealing ring 15 that cooperates with the boss 12 is provided in the first sealing groove 14. The top of the housing 1 is provided with a cavity 10 for gas to enter the bend 26 from the air inlet 3 and then from the bend 26 into the cavity 10. The gas in the cavity 10 enters the air outlet 2 through the through hole 13. The top of the support plate 11 and the guide frame 6 are connected. The support plate 11 has a through hole 13 and a first sealing groove 14. The first sealing groove 14 is embedded with a first sealing ring 15, which plays a sealing role. The top of the first float 8 is provided with a frustum-shaped boss 12. When the first float 8 passes through the through hole 13, the boss 12 and the first sealing ring 15 are in contact, and the first float 8 stops moving. Under the action of buoyancy, it plays a role in closing the through hole 13 and preventing water from flowing into the air inlet 3 along the bend 26.

[0030] The guide frame 6 includes a first connecting plate 16, a second connecting plate 17, and a fixing rod 18. The first connecting plate 16 is mounted on the base 7. One end of the fixing rod 18 is connected to the first connecting plate 16 and fits against the outer side of the first float 8. The other end of the fixing rod 18 is connected to the second connecting plate 17. The annular first connecting plate 16 is fixed to the base 7. Multiple sets of fixing rods 18 are provided on the base 7 and connected to the annular second connecting plate 17. The second connecting plate 17 is connected to the support plate 11 of the shell 1, confining the float 5 within the guide frame 6. The fixing rod 18 fits against the outer side of the first float 8, enabling the first float 8 to move vertically.

[0031] like Figure 5 As shown, the boss 12 is provided with a second sealing groove 19, and a second sealing ring 20 is provided inside the second sealing groove 19. The second sealing groove 19 is provided on the outer wall of the boss 12, and the second sealing ring 20 is embedded in the second sealing groove 19, which serves as a seal.

[0032] The gas outlet 2 is connected to a first flange 21, which is connected to the gas inlet pipe. The gas inlet 3 is connected to a second flange 22, which is connected to the gas outlet pipe. The first flange 21 is used to connect to the gas inlet pipe of the gas pipeline. The second flange 22 is used to connect to the gas outlet pipe of the gas pipeline.

[0033] The base 7 includes a base plate 23 and a protrusion 24. The bottom of the housing 1 is provided with a groove 25 that mates with the protrusion 24. The base plate 23 is provided with a hexagonal protrusion 24, and the bottom of the housing 1 is provided with a hexagonal groove 25 that mates with the protrusion 24, so that the bottom of the housing 1 can be embedded into the base plate 23. The outer side of the protrusion 24 of the base plate 23 is also provided with a groove to reduce stress concentration when bolted.

[0034] The base plate 23 and the bottom of the housing 1 are connected by bolts. In this embodiment, the base plate 23 and the bottom of the housing 1 are connected by six bolts.

[0035] The first sealing ring 15 is an O-ring, the second sealing ring 20 is an O-ring, the first float 8 and the second float 9 are both cylindrical, the first connecting plate 16 and the second connecting plate 17 are both annular, the protrusion 24 and the groove 25 are both hexagonal, and multiple sets of fixing rods 18 are provided. The first sealing ring 15 and the second sealing ring 20 are both O-rings, which provide a better sealing effect, and the multiple sets of fixing rods 18 provide a better fixing effect.

[0036] The working principle of this utility model:

[0037] A gas pipeline backflow prevention device includes a housing 1, with an outlet 2 on one side and an inlet 3 on the other side. A water-stopping mechanism 4 is provided between the outlet 2 and the inlet 3. The water-stopping mechanism 4 includes a float 5 and a guide frame 6. A base 7 is provided at the bottom of the housing 1. The base 7 includes a base plate 23 and a protrusion 24. A first annular connecting plate 16 is fixed on the base 7. Multiple sets of fixing rods 18 are provided on the base 7 and connected to a second annular connecting plate 17. The guide frame 6 is installed as a whole on the base plate 23. A cavity 10 is provided at the top of the housing 1, and a support plate 11 is provided at the bottom of the cavity 10. The second connecting plate 17 is connected to the support plate 11 of the housing 1. The float 5 includes a first float 8 and a second float 9. The outer wall of the second float 9 is in contact with the inner wall of the first float 8, so that the first float 8 and the second float 9 can move along the wall. The second float 9 is fixed to the base 7. When water flows into the outlet 2, the first float 8 rises while the second float 9 remains stationary. The top of the first float 8 has a frustum-shaped boss 12. When the first float 8 passes through the through hole 13, the boss 12 and the first sealing ring 15 engage, stopping the first float 8. Under the action of buoyancy, it closes the through hole 13, preventing water from flowing into the inlet 3 along the bend 26. When there is no water flow, the first float 8 descends, opening the through hole 13, while the second float 9 remains stationary, allowing gas to enter the outlet 2 from the inlet 3 through the bend 26. This prevents water from entering the gas pipeline without reducing the gas flow rate. The base plate 23 has a hexagonal protrusion 24, and the bottom of the housing 1 has a hexagonal groove 25 that mates with the protrusion 24, allowing the bottom of the housing 1 to be embedded into the base plate 23. The outer side of the protrusion 24 on the base plate 23 also has a groove to reduce stress concentration during bolt fixing. The base plate 23 and the bottom of the housing 1 are connected by bolts.

[0038] 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 gas pipeline backflow prevention device, characterized in that: Includes a housing (1), with an air outlet (2) on one side of the housing (1) and an air inlet (3) on the other side of the housing (1), and a water-stopping mechanism (4) between the air outlet (2) and the air inlet (3).

2. A gas pipeline backflow prevention device according to claim 1, characterized in that: The water-stopping mechanism (4) includes a float (5) and a guide frame (6). The bottom of the housing (1) is provided with a base (7). The bottom of the guide frame (6) is connected to the base (7). The float (5) is set inside the guide frame (6).

3. A gas pipeline backflow prevention device according to claim 2, characterized in that: The float (5) includes a first float (8) and a second float (9). The first float (8) is fitted onto the second float (9). The second float (9) is connected to the base (7). The first float (8) and the second float (9) are slidably connected.

4. A gas pipeline backflow prevention device according to claim 3, characterized in that: The shell (1) has a cavity (10) at the top and a support plate (11) at the bottom. The guide frame (6) is connected to the support plate (11) at the top. The first float (8) has a boss (12) at the top. The support plate (11) has a through hole (13). The air inlet (3) is connected to a bend (26). The bend (26) is located on one side of the cavity (10). The boss (12) protrudes from the through hole (13). The support plate (11) has a first sealing groove (14). The first sealing groove (14) contains the boss (12). The first sealing ring (15) fits.

5. A gas pipeline backflow prevention device according to claim 4, characterized in that: The guide frame (6) includes a first connecting plate (16), a second connecting plate (17) and a fixing rod (18). The first connecting plate (16) is mounted on the base (7). One end of the fixing rod (18) is connected to the first connecting plate (16). The fixing rod (18) is attached to the outside of the first float (8). The other end of the fixing rod (18) is connected to the second connecting plate (17).

6. A gas pipeline backflow prevention device according to claim 5, characterized in that: The boss (12) is provided with a second sealing groove (19), and a second sealing ring (20) is provided in the second sealing groove (19).

7. A gas pipeline backflow prevention device according to any one of claims 1-6, characterized in that: The air outlet (2) is connected to a first flange (21), which is connected to an air inlet pipe. The air inlet (3) is connected to a second flange (22), which is connected to an air outlet pipe.

8. A gas pipeline backflow prevention device according to claim 6, characterized in that: The base (7) includes a base plate (23) and a protrusion (24), and the bottom of the housing (1) is provided with a groove (25) that cooperates with the protrusion (24).

9. A gas pipeline backflow prevention device according to claim 8, characterized in that: The bottom plate (23) and the bottom of the shell (1) are connected by bolts.

10. A gas pipeline backflow prevention device according to claim 8, characterized in that: The first sealing ring (15) is an O-ring, the second sealing ring (20) is an O-ring, the first float (8) and the second float (9) are both cylindrical, the first connecting plate (16) and the second connecting plate (17) are both annular, the protrusion (24) and the groove (25) are both hexagonal, and the fixing rod (18) is provided in multiple sets.

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