A medium pressure relief device

Abstract

This utility model belongs to the technical field of equipment safety pressure relief devices, and relates to a medium pressure relief device, including a vent pipe, which is vertically installed on the top of the outer wall of the medium pipeline. A rainproof cover is installed on the top of the vent pipe. An extension pipe is installed on one side of the vent pipe, and the extension pipe is connected to an outlet pipe via a flange. The end of the outlet pipe has an elbow, with the outlet facing upwards. A drainage hole is provided on the bottom outer wall of the connection end between the outlet pipe and the elbow. This utility model combines a lateral outlet pipe with an upward-facing elbow to achieve safe directional release of the medium, effectively preventing backflow of rainwater and debris. The drainage hole at the bottom of the elbow can promptly drain accumulated water, avoiding ice blockage or corrosion, making it suitable for long-term use in outdoor pipelines.

Description

Technical Field

[0001] This utility model belongs to the technical field of equipment safety pressure relief devices, specifically relating to a medium pressure relief device. Background Technology

[0002] In industries such as petroleum, chemical, and natural gas, pipelines for transporting media are crucial infrastructure. To prevent safety accidents caused by overpressure, safety valves or pressure relief valves are installed on pipelines. These valves automatically activate when the pressure of the medium inside the pipeline exceeds a set value, releasing the overpressured medium into the atmosphere through a connected vent pipe, thereby reducing the pipeline pressure to a safe range.

[0003] Currently, for vent pipes installed outdoors, in order to prevent rainwater, dust and other debris from flowing back into the pipeline system through the open pipe opening, causing equipment corrosion, blockage or affecting the quality of the medium, the conventional technical method is to directly install a rain cover on the top of the vent pipe.

[0004] Common pressure relief devices typically discharge horizontally or diagonally upwards. When the pressure inside the pipeline suddenly increases, the high-pressure medium is instantly ejected from the vent. This impact is strong, the speed is high, and the medium itself may possess high temperature, flammability, or toxicity. If operators or inspectors happen to be near the vent, especially at a height similar to the vent, the sudden jet of medium will directly impact their bodies, particularly the face, easily leading to serious personal injury. This transforms equipment meant to ensure safety into a potential hazard.

[0005] Because the vent pipe needs to guide the medium to a safe height for discharge, the riser section is usually quite high, reaching several meters or even more. Installing the rain cover directly on the top of the riser involves working at height. Installation and subsequent maintenance must rely on scaffolding, aerial work platforms, or climbing, which is not only cumbersome and costly, but more importantly, the entire installation process itself requires high-risk work at height, greatly increasing the risk of accidents such as falls from heights and injuries from falling tools.

[0006] Therefore, a medium pressure relief device is proposed to solve the two major problems of direct injection risk and high-altitude operation risk, while ensuring the safety of the release and improving the installability and maintainability of the equipment itself. Utility Model Content

[0007] The purpose of this invention is to provide a medium pressure relief device that has the advantages of safe discharge and easy installation and maintenance, and solves the problems in the prior art where the discharged medium directly threatens the safety of nearby personnel and the installation of the rain cover requires high-altitude operations.

[0008] To achieve the above objectives, the present invention provides a medium pressure relief device, including a vent pipe, which is vertically installed on the top of the outer wall of the medium pipeline. A rainproof cover is provided on the top of the vent pipe, and an extension pipe is provided on one side of the vent pipe. The extension pipe is connected to an outlet pipe through a flange. An elbow is provided at the end of the outlet pipe, with the outlet of the elbow facing the sky and a drainage hole provided on the bottom outer wall of the connection end between the outlet pipe and the elbow.

[0009] Preferably, the rain cover has a conical structure, and the diameter of the rain cover is larger than the outer diameter of the vent pipe.

[0010] Preferably, the outlet pipe is horizontally positioned and the connection point with the vent pipe is located below the rain cover.

[0011] Preferably, the elbow is a 90° arc-shaped bend with the outlet end of the elbow pointing vertically upwards.

[0012] Preferably, the number of drainage holes is multiple and evenly distributed along the circumference of the bottom of the outlet pipe.

[0013] Preferably, the bottom of the rain cover is provided with a flange that connects to the vent pipe.

[0014] Preferably, the outlet tube is also equipped with a leakage sensor.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. The combination of the side outlet pipe and the upward elbow in this utility model realizes the safe directional discharge of the medium, effectively prevents rainwater and debris from flowing back in, and the drainage hole at the bottom of the elbow can drain the accumulated water in time, avoiding ice blockage or corrosion, and is suitable for long-term use of outdoor pipelines.

[0017] 2. This utility model has the advantages of safe discharge and easy installation and maintenance, and solves the problems of the leakage medium directly threatening the safety of nearby personnel and the need for high-altitude operation to install the rain cover in the prior art. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a medium pressure relief device according to one embodiment;

[0020] In the above diagrams, 1 is the vent pipe, 2 is the rain cover, 3 is the extension pipe, 4 is the flange, 5 is the lead-out pipe, 6 is the elbow, 7 is the drain hole, and 8 is the leakage sensor. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figure 1 As shown, a medium pressure relief device includes a vent pipe 1, which is vertically installed on the top of the outer wall of the medium pipeline. The bottom of the vent pipe 1 is a vertical channel connected to the medium pipeline, collecting the overpressure medium from the pipeline. It is the starting channel for pressure relief. The structure is simple and smooth, which is conducive to the upward flow of the medium. The bottom is provided with a connecting flange or a standard threaded interface to facilitate quick and sealed installation and connection with medium pipelines of different specifications.

[0024] A rain cover 2 is installed on the top of the vent pipe 1 to prevent rainwater, hail, dust, and other foreign objects from falling directly into the pipe from the top opening, thus avoiding corrosion, blockage, or contamination of the medium inside the equipment. An extension pipe 3 is installed on one side of the vent pipe 1. The extension pipe 3 is connected to an outlet pipe 5 via a flange 4. The extension pipe 3 serves as a short connecting pipe, with one end welded to the side wall of the vent pipe 1 and the other end connected to the outlet pipe 5 via the flange 4. The flange 4 provides a detachable sealing connection. The flange 4 connection makes the outlet pipe 5 and its subsequent structure an independent module, facilitating manufacturing, transportation, and on-site installation. It also facilitates replacement, maintenance, or adjustment. The outlet pipe 5 acts as a horizontal guide pipe for the medium, smoothly guiding the medium from the vertical vent pipe 1 to a safe outdoor area. Its installation height is much lower than traditional high-altitude discharge outlets, ensuring that the high-pressure medium is guided to an uninhabited area during the initial discharge phase, eliminating the risk of direct spraying to nearby personnel. The outlet pipe 5 is provided with an elbow 6 at its end. The outlet of the elbow 6 faces the sky, and the bottom outer wall of the connection end between the outlet pipe 5 and the elbow 6 is provided with a drainage hole 7.

[0025] Drain hole 7 is used to remove rainwater or condensate that may enter through the outlet of elbow 6, ensuring that accumulated water is drained quickly and effectively. This effectively prevents pipe blockage caused by water freezing or equipment corrosion caused by long-term water accumulation, ensuring the pressure relief channel remains unobstructed in any weather. Elbow 6 connects to the end of outlet pipe 5, changing the final discharge direction of the medium. The outlet end is strictly vertically upward towards the sky, allowing the medium to be discharged vertically upward, utilizing air for rapid diffusion and dilution. This further ensures the safety of personnel on the ground and avoids the potential impact of horizontal discharge on nearby equipment or buildings.

[0026] The specific design of the aforementioned key components will be discussed in detail below:

[0027] The rain cover 2 has a conical structure, with a diameter larger than the outer diameter of the vent pipe 1. The bottom diameter of the rain cover 2 is larger than the outer diameter of the vent pipe 1. A flange 4 is provided at the bottom of the rain cover 2 to connect with the vent pipe 1, and the bottom of the rain cover 2 is connected to the top of the vent pipe 1 via a flange. The conical structure effectively guides rainwater down the cover wall, preventing accumulation at the top. The design, larger than the pipe diameter, ensures sufficient protective area, completely covering the opening of the vent pipe 1 and preventing rainwater, hail, and other foreign objects from directly entering. The bottom flange allows the rain cover 2 to be pre-installed on the vent pipe 1 on the ground, or the entire vent pipe 1 to be installed at a low altitude, completely avoiding high-altitude fastening operations several meters above the pipe, reducing the safety risks and operational difficulties of installation and maintenance.

[0028] The outlet pipe 5 is horizontally positioned, and its connection point with the vent pipe 1 is located below the rain cover 2. The horizontally positioned outlet pipe 5 directs the discharged medium to a safe area away from the main pipeline. The connection point is located below the rain cover 2, ensuring that this connection area is also protected from direct rainwater erosion. This shifts the discharge outlet from a high altitude to a low altitude, changing the direction of the medium spray.

[0029] The elbow 6 is a 90° arc-shaped bend, with its outlet end pointing vertically upwards. A 90° arc-shaped bend is installed at the end of the outlet pipe 5, with its outlet end strictly vertically upwards, facing the sky. The 90° elbow 6 converts the horizontal flow of the medium into a vertical upward spray into the air. The arc-shaped structure helps reduce flow resistance and avoid turbulence. The vertically upward final discharge direction ensures that high-speed, high-temperature, or toxic media are directly dispersed and diluted in the air, completely avoiding direct impact on surrounding personnel, especially those working at the same height as those using older side-discharge outlets, thus eliminating safety hazards.

[0030] The drainage holes 7 are numerous and evenly distributed around the bottom of the outlet pipe 5. Even if a small amount of rainwater falls into the elbow 6 from the upward-facing opening, or condensation occurs due to temperature differences, it can be quickly and thoroughly drained through the drainage holes 7 at the bottom. The multiple evenly distributed holes ensure drainage without dead corners, effectively preventing water accumulation, avoiding pipe blockage failure caused by water freezing, and preventing electrochemical corrosion caused by long-term water retention, thus ensuring the long-term reliability and durability of the pressure relief channel.

[0031] A leakage sensor 8 is also installed on the outlet pipe 5. An installation interface is provided on the wall of the outlet pipe 5, and a leakage sensor 8 is installed thereon. The leakage sensor 8 is used to monitor in real time whether there is any abnormal leakage of medium before the discharge time is reached, realizing online monitoring and preventive maintenance of the pressure relief device itself, and enabling timely detection of faults such as internal leaks. The leakage sensor 8 is interlocked with the existing safety valve or pressure relief valve, and the leakage sensor 8 is temporarily closed during medium discharge to avoid false detection.

[0032] Leakage sensor 8 is preferably a fixed gas leak detector. The core detection element is selected according to the different media. For combustible gas media, such as natural gas, methane, and propane, catalytic combustion or infrared gas sensors are selected; for toxic gas media, such as hydrogen sulfide (H2S) and carbon monoxide (CO), electrochemical sensors are selected.

[0033] Leakage sensor 8 is fixed to the wall of outlet pipe 5 via a mounting base with a standard threaded interface. During installation, a mounting hole of appropriate size needs to be drilled in outlet pipe 5, and the threads are used for tightening and sealing to ensure no leakage of pipeline pressure. Leakage sensor 8 continuously monitors the gas concentration within outlet pipe 5. If the pressure relief valve experiences a minor internal leak or remains open due to a malfunction, a trace amount of medium will accumulate within outlet pipe 5, triggering an abnormal concentration detection. Leakage sensor 8 is connected to a local audible and visual alarm or a gas alarm controller in the central control room.

[0034] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A medium pressure relief device comprising a bleed pipe, the bleed pipe being vertically arranged on top of an outer wall of a medium pipe, characterized in that, The top of the vent pipe is equipped with a rain cover, and an extension pipe is provided on one side of the vent pipe. The extension pipe is connected to an outlet pipe through a flange. The end of the outlet pipe is provided with an elbow, the outlet of which faces the sky, and a drainage hole is provided on the bottom outer wall of the connection end between the outlet pipe and the elbow.

2. A medium pressure relief device according to claim 1, wherein, The rain cover has a conical structure, and its diameter is larger than the outer diameter of the vent pipe.

3. The medium pressure relief device of claim 1, wherein, The outlet pipe is horizontally positioned, and the connection point with the vent pipe is located below the rain cover.

4. The medium pressure relief device of claim 2, wherein, The elbow is a 90° arc-shaped bend with the outlet end pointing vertically upwards.

5. The medium pressure relief device of claim 1, wherein, The number of drainage holes is multiple and evenly distributed along the circumference of the bottom of the outlet pipe.

6. The medium pressure relief device of claim 2, wherein, The bottom of the rain cover is equipped with a flange that connects to the vent pipe.

7. The medium pressure relief device of claim 3, wherein, A leakage sensor is also installed on the outlet pipe.

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