A novel venting device for natural gas pressure regulating boxes

Abstract

This utility model relates to a novel venting device for a natural gas pressure regulating box, comprising a pressure regulating box body, a medium-pressure gas outlet pipe disposed on the pressure regulating box body, the medium-pressure gas outlet pipe being connected to the lower end of a flame arrester, the upper end of the flame arrester being connected to the lower end of a handle, a pressure regulator disposed on the handle for adjusting the gas flow through the handle, the upper end of the handle being connected to a low-pressure venting pipe, and a detachable cap being disposed at the port of the low-pressure venting pipe, with a gap between the cap and the outer wall of the low-pressure venting pipe. The detachable cap, mounted on the low-pressure venting pipe, protects the pipe opening and facilitates disassembly and maintenance, while the gap between the cap and the pipe wall prevents obstruction of the normal flow of vented gas. Outdoor venting is simple and convenient to debug, significantly improving work efficiency and enhancing the safety of the pressure regulating station box.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas pressure regulating equipment, and in particular to a novel venting device for a natural gas pressure regulating box. Background Technology

[0002] The pressure regulating box for natural gas is a key piece of equipment in gas transmission pipelines. Its main functions are to regulate and stabilize system pressure, control the gas flow rate, protect the system from excessively high or low outlet pressure, and promptly vent overpressured pipelines. Venting refers to the active release of gas from the pipeline using specialized equipment (such as vent valves and vent pipes) to regulate pressure or ensure safe operation. For example, before maintenance, residual gas (natural gas or air) in the pipeline needs to be vented through the vent pipe to prevent the formation of explosive mixtures. Similarly, during initial pipeline filling or shutdown, air or gas is released through venting to ensure medium purity and safety. After construction, the vent pipe is also needed to replace the air in the pipeline. Currently, venting devices require pressure boosting and depressurization testing of the pressure regulator's outlet pressure before venting can begin. This process is often time-consuming, and existing vent pipe openings lack shielding, allowing rainwater to flow into the vent pipe during wind and rain, affecting subsequent venting operations. Therefore, improvements are needed. Utility Model Content

[0003] Therefore, it is necessary to provide a new type of venting device for natural gas pressure regulating boxes to address the above problems.

[0004] A novel venting device for a natural gas pressure regulating box includes a pressure regulating box body, a medium-pressure gas outlet pipe provided on the pressure regulating box body, the medium-pressure gas outlet pipe being connected to the lower end of a flame arrester, the upper end of the flame arrester being connected to the lower end of a handle, a pressure regulator for adjusting the gas flow rate through the handle being provided on the handle, the upper end of the handle being connected to a low-pressure venting pipe, and a cap being detachably provided at the port of the low-pressure venting pipe, with a gap between the cap and the outer wall of the low-pressure venting pipe.

[0005] Preferably, the cap is conical in shape, and a threaded sleeve is provided at the opening of the cap. The threaded sleeve is connected to the cap by a support rod, and the threaded sleeve is threaded to the port of the low-pressure vent pipe, so that the cap is upside down at the port of the low-pressure vent pipe.

[0006] Preferably, the inner top of the visor is provided with a diverter corresponding to the low-pressure vent pipe.

[0007] Preferably, the flame arrester is hourglass-shaped, with flanges at both ends for connecting to the medium-pressure outlet pipe and the handle, and a flame arresting core made of multiple layers of metal mesh is provided inside the flame arrester.

[0008] Preferably, the handle portion is provided with a grip on the side opposite to the voltage regulator.

[0009] The advantages of this invention are: the cap is detachably installed on the low-pressure vent pipe, protecting the pipe opening and facilitating disassembly and maintenance. Furthermore, a gap exists between the cap and the pipe wall, preventing obstruction of the normal flow of vented gas. Outdoor venting is simple and convenient to debug, significantly improving work efficiency and enhancing the safety of the pressure regulating station box. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of a novel venting device for a natural gas pressure regulating box, as one embodiment. Figure 2 This is a schematic diagram of the hat structure. Detailed Implementation

[0011] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0012] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0014] like Figure 1As shown, a novel venting device for a natural gas pressure regulating box includes a pressure regulating box body 1. A medium-pressure gas outlet pipe 2 is installed on the pressure regulating box body 1. The medium-pressure gas outlet pipe 2 is connected to the lower end of a flame arrester 3. The upper end of the flame arrester 3 is connected to the lower end of a handle portion 4. A pressure regulator 5 for adjusting the gas flow rate through the handle portion 4 is installed on the handle portion 4. The upper end of the handle portion 4 is connected to a low-pressure venting pipe 6. A cap 7 is detachably installed at the port of the low-pressure venting pipe 6, and a gap exists between the cap 7 and the outer wall of the low-pressure venting pipe 6. Specifically, in this embodiment, the pressure regulating box body 1 is integrated into the pipeline to protect valves and other electrical control devices on the natural gas pipeline. The medium-pressure gas outlet pipe 2 extends from the pressure regulating box body 1 to connect with the natural gas pipeline and vent gas. After passing through the medium-pressure gas outlet pipe 2 and the flame arrester 3, the gas enters the handle portion 4. The handle portion 4 is detachably connected to the flame arrester 3, facilitating overall assembly and disassembly and preventing gas leakage. The flame arrester 3 prevents backfire in the downstream pipeline network and prevents flames from spreading through the pipeline and causing an explosion. The handle 4 serves as the base, supporting the pressure regulator 5, which adjusts the flow rate of natural gas passing through the handle 5. The handle 5 is used for venting tests via the low-pressure vent pipe 6. To prevent rainwater corrosion of the low-pressure vent pipe 6 during outdoor operations, a cap 7 is installed at the pipe opening. The cap 7 is detachably installed on the low-pressure vent pipe 6, protecting the pipe opening and facilitating disassembly and maintenance. It also has a gap with the pipe wall to prevent obstruction of the normal flow of vented gas. Outdoor venting is simple and convenient to debug, significantly improving work efficiency and enhancing the safety of the pressure regulating station box.

[0015] like Figure 2 As shown, the cap 7 is conical in shape, and a threaded sleeve 71 is provided at the opening of the cap 7. The threaded sleeve 71 is connected to the cap 7 via a support rod 72. The threaded sleeve 71 is threadedly connected to the port of the low-pressure vent pipe 6, so that the cap 7 is upside down at the port of the low-pressure vent pipe 6. Specifically, the conical cap 7 does not accumulate rainwater on its surface, and under wind resistance, the cap 7 has an internal threaded sleeve 71, which is screwed onto the outer wall of the low-pressure vent pipe 6. Specifically, an external thread is provided on the outer wall of the low-pressure vent pipe 6, making the threaded connection extremely convenient for assembly and disassembly.

[0016] like Figure 2 As shown, the inner top of the cap 7 is provided with a diverter head 73 corresponding to the low-pressure vent pipe 6, which is used to guide the gas flow and make it disperse more quickly to the surrounding area.

[0017] like Figure 2As shown, the flame arrester 3 is hourglass-shaped, with flanges 31 at both ends for connecting to the medium-pressure outlet pipe 2 and the handle part 4. The flame arrester 3 contains a flame-arresting core made of multiple layers of metal mesh. Specifically, the flanges 31 facilitate easy assembly and disassembly. The flame-arresting core is a multi-layered metal mesh assembly, woven from 304 stainless steel wire mesh, suitable for medium and low pressure systems (e.g., 0.6-4.0 MPa).

[0018] like Figure 1 As shown, a handle 41 is provided on the side of the handle 4 away from the voltage regulator 5, which makes it convenient for maintenance personnel to hold the handle 41 during operation and to carry out disassembly and maintenance work, reducing the difficulty of disassembly.

[0019] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A new type of bleeder device for natural gas pressure regulating tank, characterized in that: The device includes a pressure regulating box, on which a medium-pressure gas outlet pipe is provided. The medium-pressure gas outlet pipe is connected to the lower end of a flame arrester. The upper end of the flame arrester is connected to the lower end of a handle. The handle is provided with a pressure regulator for adjusting the gas flow rate through the handle. The upper end of the handle is connected to a low-pressure vent pipe. A cap is detachably provided at the port of the low-pressure vent pipe, and there is a gap between the cap and the outer wall of the low-pressure vent pipe.

2. The novel venting device for a natural gas pressure regulating box as described in claim 1, characterized in that: The cap is cone-shaped, and a threaded sleeve is provided at the opening of the cap. The threaded sleeve is connected to the cap by a support rod. The threaded sleeve is threaded to the port of the low-pressure vent pipe, so that the cap is upside down at the port of the low-pressure vent pipe.

3. A novel venting device for a natural gas pressure regulating box as described in claim 2, characterized in that: The inner top of the hood is provided with a diverter corresponding to the low-pressure vent pipe.

4. A novel venting device for a natural gas pressure regulating box as described in claim 1, characterized in that: The flame arrester is hourglass-shaped, with flanges at both ends for connecting to the medium-pressure outlet pipe and the handle. The flame arrester has a flame-arresting core made of multiple layers of metal mesh inside.

5. A novel venting device for a natural gas pressure regulating box as described in claim 1, characterized in that: The handle is provided on the side opposite to the voltage regulator.

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