A rain protection device for a blowdown riser nozzle

Abstract

The application discloses a rainproof device for a venting standpipe nozzle, which comprises a central main pipe, a plurality of venting branch pipes connected to the central main pipe, and a plurality of rainwater diversion baffles and a plurality of venting gas diversion baffles arranged in the central main pipe. The rainwater diversion baffles are arranged above the upper ports of the venting branch pipes, and the venting gas diversion baffles are arranged above the lower ports of the venting branch pipes. The lower ends of the venting gas diversion baffles converge and are communicated with a liquid discharge port arranged on the side wall of the central main pipe. The venting gas diversion baffles arranged in a V shape can divert the venting gas, reduce the obstruction of the rainproof device to the venting gas, reduce the impact of the venting gas on the rainproof device, ensure the smooth discharge of the venting gas, avoid the inflow of rainwater into the venting pipeline, and are particularly suitable for the rainproof of the venting standpipe under the condition of high-pressure and large-flow gas venting.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction technology, specifically a rainproof device for the outlet of a vent riser. Background Technology

[0002] Vent risers are common gas emission facilities in the oil and gas industry. Because vent risers are typically installed vertically upwards, if the riser opening is open and no rain protection measures are taken, a large amount of rainwater will inevitably accumulate inside the vent pipeline. Water accumulation inside the vent pipeline accelerates corrosion, hinders the smooth discharge of vented gases, and in winter may cause freezing and blockage, affecting normal production and even leading to safety accidents.

[0003] Currently, the rainproof measures commonly used in engineering projects for vent risers mainly include the following categories: (1) the upper end of the vent riser is open, and a liquid accumulation section is set at the lower end; (2) a bend is set at the upper end of the vent riser; (3) a rainproof cap is set at the upper end of the vent riser; (4) a tee is set at the upper end of the vent riser. Although the above rainproof measures can play a role in preventing rain, they also have their own drawbacks. For example, measure one cannot prevent rainwater from entering the vent riser, but only increases the function of rainwater storage and discharge. If the rainwater in the liquid accumulation section is not discharged in time, it may still cause corrosion and blockage of the vent pipe. Measures two, three, and four can prevent rainwater from entering the vent riser, but their structure affects the airflow discharge. The impact of gas discharge applied to these rainproof structures may cause the vent riser to be unstable or even tilted, which is particularly unsuitable for high-pressure, high-flow gas venting. Summary of the Invention

[0004] In order to solve the above-mentioned problems of the current rain protection measures for vent risers, the present invention designs a rain protection device for the vent riser outlet.

[0005] The present invention is achieved by the following technical solution.

[0006] A rainproof device for a vent riser includes a central main pipe, to which several vent branch pipes are connected, with both the upper and lower ends of the branch pipes connected to the central main pipe; several rainwater guide baffles and several air vent guide baffles are inclined downwards inside the central main pipe, with the rainwater guide baffles located above the upper ends of the branch pipes; the air vent guide baffles are located above the lower ends of the branch pipes, and the lower ends of the several air vent guide baffles converge and connect to a drain port located on the side wall of the central main pipe.

[0007] Furthermore, the lower end of the central main pipe forms the lower air inlet of the central main pipe, and the upper end of the central main pipe forms the upper exhaust outlet of the central main pipe.

[0008] Furthermore, a venting branch pipe is connected to each side of the central main pipe, and the two venting branch pipes are arranged symmetrically.

[0009] Furthermore, the upper end of the venting baffle is fixed to the upper edge of the lower port of the venting branch pipe.

[0010] Furthermore, the vent branch pipe is arc-shaped.

[0011] Furthermore, a rainwater guide baffle is provided above the upper end of each venting branch pipe.

[0012] The present invention achieves the following beneficial effects.

[0013] This invention features V-shaped air venting guide baffles that divert vented gas, reducing the obstruction of the vented gas discharge by the rainproof device and minimizing the impact of the vented gas discharge on the rainproof device. It ensures smooth discharge of vented gas while preventing rainwater from flowing into the venting pipe, making it particularly suitable for rainproofing venting risers under high-pressure, high-flow-rate gas venting conditions. This invention has a simple structure, is easy to manufacture, and is highly practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This invention follows Figure 1 Cross-sectional view along line AA; Figure 3 This invention follows Figure 1 Cross-sectional view of the middle BB line.

[0015] The components are: 1. Central main pipe; 2. Lower air inlet of central main pipe; 3. Air vent guide baffle; 4. Drain outlet; 5. Vent branch pipe; 6. Rainwater guide baffle; 7. Upper exhaust outlet of central main pipe. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1-3 As shown, a rainproof device for a vent riser pipe includes a central main pipe 1, a lower air inlet 2 of the central main pipe, a vent air guide baffle 3, a drain outlet 4, a vent branch pipe 5, a rainwater guide baffle 6, and an upper exhaust outlet 7 of the central main pipe.

[0018] The lower end of the central main pipe 1 forms the lower air inlet 2 of the central main pipe, and the upper end of the central main pipe 1 forms the upper exhaust outlet 7 of the central main pipe.

[0019] Several venting branch pipes 5 are arranged around the middle of the central main pipe 1. Preferably, two venting branch pipes 5 are arranged symmetrically on both sides of the central main pipe 1. Specifically, the venting branch pipes 5 are arc-shaped. The upper and lower ends of the two venting branch pipes 5 are welded to the outer wall of the central main pipe 1, and the venting branch pipes 5 are connected to the central main pipe 1. The venting gas flows through the venting branch pipes 5.

[0020] Several rainwater guide baffles 6 and several air vent guide baffles 3 are installed at an angle downwards within the central main pipe 1. Specifically, the rainwater guide baffles 6 are located above the upper ports of the air vent branch pipes 5, and each air vent branch pipe 5 has a corresponding rainwater guide baffle 6 above its upper port. More specifically, the rainwater guide baffles 6 are arc-shaped, with their upper ends fixed to the inner wall of the central main pipe 1, and their other ends angled downwards close to the central axis of the central main pipe 1. The downwardly angled rainwater guide baffles 6 block part of the upper ports of the air vent branch pipes 5, thereby guiding the rainwater and preventing it from entering the air vent branch pipes 5.

[0021] The venting baffle 3 is located above the lower port of the venting branch pipe 5. Specifically, the upper end of the venting baffle 3 is fixed to the upper edge of the lower port of the venting branch pipe 5, and the other end is inclined downwards. Several venting baffles 3 converge at their lower ends to form a V-shape, and the bottom end of the V-shape is connected to the drain port 4 located on the side wall of the central main pipe 1. The venting baffle 3 serves two purposes: firstly, to guide the venting gas into the venting branch pipe 5, and secondly, to guide rainwater to the outside of the central main pipe 1.

[0022] The working principle of this invention is as follows: The vented gas enters the rainproof device at the inlet 2 at the lower end of the central main pipe. The vented gas is diverted at the venting baffle 3, and then flows through the venting branch pipes 5 on both sides, finally being discharged into the atmosphere through the exhaust port 7 at the upper end of the central main pipe. Rainwater in the atmosphere flows into the central main pipe 1 through the exhaust port 7 at the upper end of the central main pipe. It is then guided by the rainwater baffle 6 installed at the upper edge of the interface between the venting branch pipe 5 and the central main pipe to the liquid accumulation section formed by the central main pipe 1 and the venting baffle 3. The rainwater is finally discharged outside the venting riser through the drain port 4.

[0023] Although embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rainproof device for the outlet of a vent riser, comprising a central main pipe (1), characterized in that: The central main pipe (1) is connected to several venting branch pipes (5), and the upper and lower ends of the venting branch pipes (5) are connected to the central main pipe (1). Several rainwater guide baffles (6) and several air venting guide baffles (3) are provided inclined downward inside the central main pipe (1). The rainwater guide baffles (6) are located above the upper port of the venting branch pipes (5). The air venting guide baffles (3) are located above the lower port of the venting branch pipes (5), and the lower ends of several air venting guide baffles (3) converge and are connected to the drain port (4) located on the side wall of the central main pipe (1).

2. The rainproof device for the outlet of a venting riser according to claim 1, characterized in that: The lower end of the central main pipe (1) forms the lower air inlet (2), and the upper end of the central main pipe (1) forms the upper exhaust outlet (7).

3. The rainproof device for the outlet of a venting riser pipe according to claim 1, characterized in that: The central main pipe (1) is connected to a venting branch pipe (5) on each side, and the two venting branch pipes (5) are arranged symmetrically.

4. The rainproof device for the outlet of a venting riser according to claim 1, characterized in that: The upper end of the venting guide baffle (3) is fixed on the upper edge of the lower port of the venting branch pipe (5).

5. A rainproof device for the outlet of a venting riser pipe according to claim 1, characterized in that: The venting branch pipe (5) is arc-shaped.

6. A rainproof device for the outlet of a venting riser according to claim 1, characterized in that: Each venting branch pipe (5) has a corresponding rainwater guide baffle (6) above its upper port.

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