A device for preventing gas inlet pipe from freezing and becoming blocked.

Abstract

This utility model relates to the field of natural gas transmission technology and discloses a device for preventing freezing and blockage of a gas inlet pipe. The device includes a gas riser with connecting components at both ends. An antifreeze component is installed on the inner wall of the gas riser, comprising a flow-slowing block disposed on the inner wall of the gas riser. An insulation layer is provided in the interlayer of the gas riser, and a heat-conducting pipe is attached to the outer wall of the insulation layer. A heat transfer layer is fitted inside the heat-conducting pipe. A rotating column is rotatably connected to the inner wall of the gas riser, and a support column is fixedly connected to the outer wall of the rotating column. A rotating block is fixedly connected to the outer wall of the support column. In this utility model, the polytetrafluoroethylene coating on the inner wall of the gas riser reduces moisture adhesion, the insulation layer blocks external low temperatures, the heat transfer layer evenly transfers heat through the heat-conducting pipe, and the gas pushes the rotating block to store force in a torsion spring. When the flow rate is low, the torsion spring resets. Combined with the flow-slowing block to slow down and prevent heat loss, this device effectively reduces the conditions for icing inside the pipe and prevents freezing and blockage.

Description

Technical Field

[0001] This utility model relates to the field of natural gas transmission technology, and in particular to a device for preventing the gas inlet pipe from freezing and becoming blocked. Background Technology

[0002] As a key component connecting the outdoor gas riser to the indoor gas system, the gas inlet pipe's operating condition directly affects the stability and safety of the gas supply. In low-temperature environments, especially in northern winters, the gas inlet pipe is prone to freezing and blockage due to residual moisture inside the pipe, external low-temperature conduction, and heat loss. This can not only lead to gas supply interruptions but also pose safety hazards such as pipe rupture due to freezing expansion. Therefore, preventing freezing and blockage of the gas inlet pipe is of paramount importance.

[0003] In existing technologies, preventing freezing and blockage of gas inlet pipes mostly employs single protective measures, such as wrapping the outside of the pipe with insulation material to reduce low-temperature intrusion, or using inclined pipes to allow water to flow naturally to the drain outlet. The underlying principle is mainly to rely on the thermal insulation properties of the insulation material to block external low temperatures, or to utilize gravity to reduce water accumulation inside the pipe, thereby lowering the risk of freezing and blockage.

[0004] However, existing technologies cannot prevent uneven heat distribution and localized low-temperature zones in pipes by relying solely on insulation materials. Furthermore, they cannot solve the problem of accelerated heat loss when the gas flow rate is too high, and there is still a risk of freezing blockage caused by water condensation inside the pipes. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a device to prevent the gas inlet pipe from freezing and becoming blocked, aiming to improve the problems caused by easy adhesion of moisture inside the gas inlet pipe, easy transmission of external low temperature, uneven heat distribution inside the pipe, and heat loss due to excessive gas flow rate.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for preventing gas inlet pipe from freezing and becoming blocked, comprising a gas riser, wherein both ends of the gas riser are provided with connecting components, and the inner wall of the gas riser is provided with an antifreeze component;

[0007] The antifreeze component includes a flow-retarding block disposed on the inner wall of the gas riser. The gas riser is provided with an insulation layer, and a heat-conducting pipe is attached to the outer wall of the insulation layer. A heat transfer layer is sleeved on the inner wall of the heat-conducting pipe. A rotating column is rotatably connected to the inner wall of the gas riser. A support column is fixedly connected to the outer wall of the rotating column. A rotating block is fixedly connected to the outer wall of the support column. A torsion spring is sleeved on the outer wall of the rotating column.

[0008] Furthermore, the connecting assembly includes a second flange ring, which is disposed at both ends of the gas riser. The inner wall of the second flange ring has a positioning hole, and the outer wall of the second flange ring is fixedly connected with a buckle. The outer wall of the second flange ring has a first flange ring, and the outer wall of the first flange ring is fixedly connected with a positioning post. The inner wall of the first flange ring has a locking block, and the inner wall of the first flange ring is threaded with a screw. The outer wall of the screw is threaded with a nut.

[0009] Furthermore, the outer wall of the screw is rotatably connected to the inner wall of the second flange ring, and the inner wall of the nut is fitted to the outer wall of the second flange ring.

[0010] Furthermore, the outer wall of the positioning post is slidably connected to the inner wall of the positioning hole, and the outer wall of the buckle is slidably connected to the inner wall of the buckle block.

[0011] Furthermore, one end of the torsion spring is fixedly connected to the upper side of the inner wall of the gas riser, and the inner wall of the flow-slowing block is fixedly connected to the outer wall of the rotating block.

[0012] Furthermore, the torsion spring is disposed on the inner wall of the support column, and the insulation layer is made of extruded polystyrene foam.

[0013] Furthermore, the inner wall of the gas riser is coated with polytetrafluoroethylene, and the heat transfer layer is disposed within the gas riser interlayer.

[0014] Furthermore, the heat transfer layer is disposed within the gas riser interlayer, and the heat transfer layer is made of carbon fiber reinforced thermal conductive felt material.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the polytetrafluoroethylene coating on the inner wall of the gas riser reduces moisture adhesion, the insulation layer blocks external low temperatures, the heat transfer layer evenly transfers heat through the heat conduction pipe, and the gas pushes the rotating block to store the torsion spring. When the flow rate is low, the torsion spring resets. In conjunction with the flow slowing block, the flow is reduced to prevent heat loss. This solves the problems of easy moisture adhesion in the gas inlet pipe, easy transmission of external low temperatures, uneven heat distribution in the pipe, and heat loss caused by excessive gas flow rate. It achieves the effect of reducing the conditions for freezing in the pipe and preventing freezing blockage.

[0017] 2. In this utility model, flange ring one and flange ring two are initially positioned by inserting positioning pins into positioning holes, and the buckles and clips are engaged to further fix their positions. Then, screws are passed through the two flange rings and tightened with nuts to complete the stable connection with the external pipeline. This achieves the effects of precise pipeline docking, ensuring connection stability and sealing, and preventing gas leakage and cold air infiltration. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a device for preventing freezing and blockage of a gas inlet pipe according to the present invention.

[0019] Figure 2 This is a schematic diagram of the flow-retarding block portion of a device for preventing freezing and blockage of a gas inlet pipe, as proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the rotating block portion of a device for preventing freezing and blockage of a gas inlet pipe, as proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the torsion spring portion of a device for preventing freezing and blockage of a gas inlet pipe, as proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the snap-fit ​​part of a device for preventing freezing and blockage of a gas inlet pipe, as proposed in this utility model.

[0023] Legend:

[0024] 1. Gas riser; 2. Flange ring one; 3. Flange ring two; 4. Flow buffer block; 5. Rotating block; 6. Insulation layer; 7. Heat transfer layer; 8. Heat conduction pipe; 9. Support column; 10. Rotating column; 11. Torsion spring; 12. Positioning hole; 13. Positioning column; 14. Clip; 15. Locking block; 16. Screw; 17. Nut. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 - Figure 3 The present invention provides an embodiment of a device for preventing gas inlet pipe from freezing and blocking, comprising a gas riser 1, with connecting components at both ends of the gas riser 1 and an antifreeze component on the inner wall of the gas riser 1.

[0027] The antifreeze component includes a flow-slowing block 4, which works in conjunction with a rotating block 5 to slow down the gas flow rate and reduce heat loss by changing the flow channel cross-section. The flow-slowing block 4 is installed on the inner wall of the gas riser 1. The gas riser 1 has an insulation layer 6 sandwiched between layers. A heat-conducting pipe 8 is attached to the outer wall of the insulation layer 6, which, together with a heat transfer layer 7, transfers heat along the axial and radial directions of the pipe to ensure uniform heat distribution within the pipe. The heat transfer layer 7 is fitted inside the heat-conducting pipe 8. A rotating column 10 is rotatably connected to the inner wall of the gas riser 1. A support column 9 is fixedly connected to the outer wall of the rotating column 10. A rotating block 5 is fixedly connected to the outer wall of the support column 9. A torsion spring 11 is fitted on the outer wall of the rotating column 10. When the gas flows, it stores energy and resets when the flow rate is low, causing the rotating block 5 to rotate in the opposite direction to control the flow rate. The gas riser 1 is installed before the frozen soil layer.

[0028] Specifically, the polytetrafluoroethylene coating on the inner wall of the gas riser 1 reduces moisture adhesion and prevents moisture from condensing on the pipe wall. The extruded polystyrene foam insulation layer 6 in the interlayer blocks the transmission of external low temperature and reduces heat loss inside the pipe. The heat transfer layer 7 made of carbon fiber reinforced heat-conducting felt evenly conducts heat inside the pipe through the heat-conducting pipe 8, eliminating local low temperature areas. When the gas flows, it pushes the rotating block 5, which drives the support column 9 and the rotating column 10 to rotate, causing the torsion spring 11 to store force. When the gas flow is small, the torsion spring 11 resets and drives the rotating block 5 to rotate in the opposite direction. In conjunction with the flow slowing block 4, it slows down the flow rate and reduces heat loss. The slight heat generated by the rotation can also help prevent icing.

[0029] Reference Figure 1 - Figure 5 The connecting assembly includes flange ring 2 (3), which is located at both ends of the gas riser 1. Positioning holes 12 are provided on the inner wall of flange ring 2 (3). Clips 14 are fixedly connected to the outer wall of flange ring 2 (3) to further fix the relative position of flange ring 1 (2) and flange ring 2 (3) and prevent misalignment. Flange ring 1 (2) is located on the outer wall of flange ring 2 (3). A positioning post 13 is fixedly connected to the outer wall of flange ring 1 (2). A locking block 15 is provided on the inner wall of flange ring 1 (2). A screw 16 is threadedly connected to the inner wall of flange ring 1 (2). A nut 17 is threadedly connected to the outer wall of screw 16. The outer wall of screw 16 is rotatably connected to the inner wall of flange ring 2 (3), and the inner wall of nut 17 is fitted against flange ring 2 (3). The outer wall of the positioning column 13 is slidably connected to the inner wall of the positioning hole 12, the outer wall of the buckle 14 is slidably connected to the inner wall of the buckle block 15, one end of the torsion spring 11 is fixedly connected to the upper side of the inner wall of the gas riser 1, the inner wall of the flow buffer block 4 is fixedly connected to the outer wall of the rotating block 5, the torsion spring 11 is set on the inner wall of the support column 9, the insulation layer 6 is made of extruded polystyrene foam, the inner wall of the gas riser 1 is coated with polytetrafluoroethylene, the heat transfer layer 7 is set in the interlayer of the gas riser 1, the heat transfer layer 7 is set in the interlayer of the gas riser 1, the heat transfer layer 7 is made of carbon fiber reinforced thermal conductive felt, the gas riser 1 has two connection methods, welding or flange connection can be selected.

[0030] Specifically, flange ring 12 and flange ring 23 are initially positioned by inserting positioning pin 13 into positioning hole 12, and buckle 14 and buckle block 15 are engaged to further fix them. Then, screw 16 is passed through the two flange rings and tightened with nut 17 to complete the connection between gas riser 1 and external pipeline.

[0031] Working principle: When a device is needed to prevent the gas inlet pipe from freezing, the polytetrafluoroethylene coating on the inner wall of the gas riser 1 reduces moisture adhesion, the insulation layer 6 of the interlayer is made of extruded polystyrene foam to block the transmission of external low temperature, and the heat transfer layer 7 is made of carbon fiber reinforced heat-conducting felt. The heat is evenly conducted in the pipe through the heat-conducting pipe 8 to reduce local low temperature areas. When the gas flows, it pushes the rotating block 5, which drives the support column 9 and the rotating column 10 to rotate. The torsion spring 11 stores energy. When the gas flow is small, the torsion spring 11 resets and drives the rotating block 5 to rotate in the opposite direction. In conjunction with the flow-slowing block 4, it slows down the gas flow rate and reduces heat loss caused by excessive flow rate. At the same time, the slight heat generated by the rotation helps to prevent ice formation in the pipe, thus achieving the anti-freezing effect.

[0032] In addition, in the connecting assembly, flange ring 1 2 and flange ring 2 3 are initially positioned by inserting positioning pin 13 into positioning hole 12, and buckle 14 and buckle block 15 are engaged to further fix the position. Then, screw 16 passes through the two flange rings and is tightened with nut 17 to complete the stable connection between gas riser 1 and external pipeline, ensuring the sealing of gas transmission and preventing gas leakage and cold air from the outside from seeping in from the interface.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for preventing the freezing of a gas intake pipe, comprising a gas riser (1), characterized in that: Both ends of the gas riser (1) are provided with connecting components, and the inner wall of the gas riser (1) is provided with antifreeze components; The antifreeze component includes a flow-retarding block (4), which is disposed on the inner wall of the gas riser (1). The gas riser (1) is provided with an insulation layer (6). A heat-conducting pipe (8) is attached to the outer wall of the insulation layer (6). A heat transfer layer (7) is sleeved on the inner wall of the heat-conducting pipe (8). A rotating column (10) is rotatably connected to the inner wall of the gas riser (1). A support column (9) is fixedly connected to the outer wall of the rotating column (10). A rotating block (5) is fixedly connected to the outer wall of the support column (9). A torsion spring (11) is sleeved on the outer wall of the rotating column (10).

2. A device for preventing the freezing of a gas inlet pipe according to claim 1, characterized in that: The connecting assembly includes a second flange ring (3), which is disposed at both ends of the gas riser (1). The inner wall of the second flange ring (3) is provided with a positioning hole (12). The outer wall of the second flange ring (3) is fixedly connected with a buckle (14). The outer wall of the second flange ring (3) is provided with a first flange ring (2). The outer wall of the first flange ring (2) is fixedly connected with a positioning post (13). The inner wall of the first flange ring (2) is provided with a locking block (15). The inner wall of the first flange ring (2) is threaded with a screw (16). The outer wall of the screw (16) is threaded with a nut (17).

3. A device for preventing the freezing of a gas inlet pipe according to claim 2, characterized in that: The outer wall of the screw (16) is rotatably connected to the inner wall of the flange ring (3), and the inner wall of the nut (17) is attached to the outer wall of the flange ring (3).

4. A device for preventing the freezing of a gas inlet pipe according to claim 2, characterized in that: The outer wall of the positioning post (13) is slidably connected to the inner wall of the positioning hole (12), and the outer wall of the buckle (14) is slidably connected to the inner wall of the buckle block (15).

5. The device for preventing freezing and blockage of a gas inlet pipe according to claim 1, characterized in that: One end of the torsion spring (11) is fixedly connected to the upper side of the inner wall of the gas riser (1), and the inner wall of the slow flow block (4) is fixedly connected to the outer wall of the rotating block (5).

6. The device for preventing freezing and blockage of a gas inlet pipe according to claim 1, characterized in that: The torsion spring (11) is installed on the inner wall of the support column (9), and the insulation layer (6) is made of extruded polystyrene foam.

7. The device for preventing freezing and blockage of a gas inlet pipe according to claim 1, characterized in that: The inner wall of the gas riser (1) is coated with polytetrafluoroethylene, and the heat transfer layer (7) is set in the interlayer of the gas riser (1).

8. The device for preventing freezing and blockage of a gas inlet pipe according to claim 1, characterized in that: The heat transfer layer (7) is disposed in the interlayer of the gas riser (1), and the heat transfer layer (7) is made of carbon fiber reinforced thermal conductive felt.

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