A ship pipeline antisiphon device

Abstract

The utility model provides a kind of ship pipeline siphon breaking device, including pressure regulating vessel and breather pipe, the breather pipe is swan neck pipe, the lower part of breather pipe is inserted into the pressure regulating vessel, and is sealingly connected with the pressure regulating vessel, the upper portion of the outer side wall of the pressure regulating vessel is equipped with the outlet pipe being communicated with its interior, and the outlet pipe is connected with the pipeline.The siphon breaking device balances the static pressure of liquid in the device with the air pressure in the siphon pipe, forms a sealed barrier, and avoids the occurrence of siphon phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of marine ventilation technology, and specifically relates to a siphon breaking device for marine pipelines. Background Technology

[0002] In pipeline siphoning, the pressure difference between the liquid levels at both ends of a flowing liquid within the pipe creates an atmospheric pressure difference that drives the liquid's movement. When the pressure at the lowest point or bend in the siphoning pipe is lower than the liquid's saturated vapor pressure, bubbles easily form. These bubbles burst rapidly as they flow to the high-pressure zone, generating high-frequency impacts (cavitation). Prolonged cavitation can lead to honeycomb-like wear and corrosion on the pipe's inner wall, pump impeller, and other components. Prolonged negative pressure within the pipe can cause equipment seals to deform under external atmospheric pressure, leading to leaks and shortening equipment lifespan. The sudden change in fluid velocity caused by siphoning can generate water hammer. Water hammer can cause severe vibrations within the pipe, valve damage, loosening of joints, and even pipe rupture, threatening equipment safety and impacting ship operations. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a siphon breaking device for ship pipelines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A siphon breaking device for a ship's pipeline includes a pressure regulating container and a vent pipe. The vent pipe is a gooseneck pipe, and its lower part extends into the pressure regulating container and is sealed to the pressure regulating container. The upper part of the outer wall of the pressure regulating container is provided with an outlet pipe communicating with its interior, and the outlet pipe is connected to the pipeline.

[0005] Furthermore, the pressure regulating container includes a circular tube body, a sealing bottom plate is provided at the lower end of the circular tube body, a top sealing plate is provided at the upper end of the circular tube body, and the lower part of the vent pipe passes through the top sealing plate and is sealed and fixedly connected to the top sealing plate.

[0006] Furthermore, the vent pipe includes a vertical section and a curved section, and the upper end of the vertical section is detachably connected to the opposite end of the curved section via a flange.

[0007] Furthermore, an insect-proof net is provided at the end port of the vent pipe.

[0008] Furthermore, the outlet pipe is connected to the pipeline via a flange and connecting bolts.

[0009] Furthermore, a vent hole is provided on the lower part of the outer wall of the circular tube body, and a vent plug is provided in the vent hole.

[0010] This utility model relates to a siphon breaking device for ship pipelines, which adds a breaking device to the siphon pipeline to avoid the impact of siphon on the pipeline and equipment.

[0011] The siphon-breaking device described in this invention achieves a balance between the static pressure of the liquid within the device and the air pressure within the siphon tube, forming a sealed barrier to prevent siphoning. During normal pipeline operation, the air pressure within the pipeline is greater than the liquid pressure within the siphon-breaking device, causing the liquid level in the vent tube to rise until pressure equilibrium is reached. When siphoning occurs, the liquid level in the vent tube drops to the lowest point of the vent tube opening, drawing air into the pipeline and disrupting the low pressure within the pipeline, thus resolving the siphoning phenomenon and ensuring the safe operation of the equipment and pipeline. The design of the siphon-breaking device reduces the need for vacuum breaker valves, facilitating later maintenance by the shipowner. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the ship pipeline siphon breaking device described in this utility model.

[0013] Figure 2 This is a schematic diagram of the liquid level state when the ship pipeline siphon breaking device described in this utility model is not in operation.

[0014] Figure 3 This is a schematic diagram of the liquid level during normal operation of the ship pipeline siphon breaking device described in this utility model.

[0015] Figure 4 This is a schematic diagram of the liquid level state when the siphon occurs in the ship pipeline siphon breaking device described in this utility model.

[0016] Among them, 1-sealing base plate, 2-round pipe body, 3-vent pipe, 4-top sealing plate, 5-vent plug, 6-flange, 7-insect net, 8-outlet pipe, 9-connecting bolt, 10-pipe, 31-vertical section, 32-bent section. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 As shown, a siphon breaking device for a ship's pipeline includes a pressure regulating container and a vent pipe 3. The vent pipe 3 is a gooseneck pipe. The lower part of the vent pipe 3 extends into the pressure regulating container and is sealed to the pressure regulating container. The upper part of the outer wall of the pressure regulating container is provided with an outlet pipe 8 that communicates with its interior. The outlet pipe 8 is connected to the pipeline 10.

[0019] In this embodiment, the pressure regulating container includes a circular tube body 2, a sealing bottom plate 1 is provided at the lower port of the circular tube body 2, a top sealing plate 4 is provided at the upper port of the circular tube body 2, and the lower part of the vent pipe 3 passes through the top sealing plate 4 and is sealed and fixedly connected with the top sealing plate 4.

[0020] The vent pipe 3 includes a vertical section 31 and a curved section 32. The upper end of the vertical section 31 and the opposite end of the curved section 32 are detachably connected by a flange 6, which facilitates the replenishment of liquid in the device later. An insect-proof net 7 is provided at the end port of the vent pipe 3 to prevent flying insects from entering the siphon breaking device.

[0021] Specifically, the outlet pipe 8 is connected to the pipe 10 via a flange 6 and connecting bolts 9.

[0022] Furthermore, a vent hole is provided on the lower part of the outer side wall of the circular tube body 2, and a vent plug 5 is provided in the vent hole.

[0023] like Figures 2-4 As shown, when not in operation, liquid is added to the siphon breaking device through flange 66; when the pipeline 10 is working normally, the air pressure in the pipeline 10 is greater than the pressure in the siphon breaking device, causing the liquid level in the siphon breaking device to rise from the vent pipe 33, and the liquid level stabilizes when it reaches equilibrium with the air pressure in the pipeline 10; when a siphon phenomenon occurs in the pipeline 10, the air pressure in the pipeline 10 decreases, and the external atmospheric pressure draws air into the siphon breaking device through the vent pipe 33 to replenish the air pressure in the pipeline 10 and break the siphon phenomenon.

[0024] Those skilled in the art should understand that the above description is merely a specific embodiment of the present utility model and is not intended to limit the present utility model. 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 siphon breaking device for ship pipelines, characterized in that, The device includes a pressure regulating container and a vent pipe. The vent pipe is a gooseneck pipe, and its lower part extends into the pressure regulating container and is sealed to it. The upper part of the outer wall of the pressure regulating container is provided with an outlet pipe communicating with its interior, and the outlet pipe is connected to the pipeline. The pressure regulating container includes a circular tube body, a sealing bottom plate is provided at the lower end of the circular tube body, and a top sealing plate is provided at the upper end of the circular tube body. The lower part of the vent pipe passes through the top sealing plate and is sealed and fixedly connected to the top sealing plate.

2. The siphon breaking device for ship pipelines according to claim 1, characterized in that, The vent pipe includes a vertical section and a curved section, and the upper end of the vertical section is detachably connected to the opposite end of the curved section via a flange.

3. The siphon breaking device for ship pipelines according to claim 2, characterized in that, An insect-proof net is provided at the end port of the vent pipe.

4. The siphon breaking device for ship pipelines according to claim 1, characterized in that, The outlet pipe is connected to the pipeline via a flange and connecting bolts.

5. The siphon breaking device for ship pipelines according to claim 1, characterized in that, A vent hole is provided on the lower part of the outer side wall of the circular tube body, and a vent plug is provided in the vent hole.

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