A new type of natural gas pipeline pressure regulating box

Abstract

The utility model relates to a novel natural gas pipeline pressure regulating box, including the box, the horizontal intake pipe of being provided with in the box, be connected with the air inlet ball valve on the intake pipe, the intake pipe is connected with the vertical pressure regulating pipe through the anti -block elbow, be provided with two groups pressure gauge and pressure regulating valve on the pressure regulating pipe, pressure gauge and pressure regulating valve staggered setting on the pressure regulating pipe, the ventilation pipe of pressure regulating valve is perpendicular to downward, the pressure regulating pipe is connected with the air outlet pipe through the filter and constitutes the U shape, be connected with the meter on the air outlet pipe. The anti -block elbow is integrated between the intake pipe and the pressure regulating pipe, prevents the ice block inside by the anti -block elbow, avoids the ice block influence downstream gas, guarantees the safety of natural gas delivery.

Description

Technical Field

[0001] This utility model relates to the field of natural gas pressure regulation technology, and in particular to a novel natural gas pipeline pressure regulating box. Background Technology

[0002] Natural gas refers to a mixture of hydrocarbon and non-hydrocarbon gases naturally occurring in underground strata. In petroleum geology, it usually refers to oilfield gas and gas field gas, primarily found in oil and natural gas fields, with smaller amounts also originating from coal seams. Natural gas is mainly used as fuel and can be used to manufacture carbon black, chemicals, and liquefied petroleum gas (LPG). Propane and butane produced from natural gas are important raw materials for modern industry. Natural gas is typically transported via pipelines. A natural gas pressure regulator on the pipeline is a device that maintains a stable pressure in the downstream pipeline regardless of changes in gas flow and upstream pressure. The regulator adjusts the higher inlet pressure to a lower outlet pressure and automatically controls the outlet pressure within a set value according to changes in natural gas demand, ensuring the downstream pressure remains within a safe range and guaranteeing gas safety for downstream users. However, during pressure regulation, pipeline bends are unavoidable. When moisture in the pipeline is not completely dried, low-lying areas easily form at bends. Residual liquid water from pipeline testing or operation is more likely to accumulate and freeze at these points, causing ice blockage. This reduces the pipeline's flow area or even completely blocks it, affecting gas supply to downstream users. Therefore, improvements are needed. Utility Model Content

[0003] Therefore, it is necessary to provide a new type of natural gas pipeline pressure regulating box to address the above problems.

[0004] A novel natural gas pipeline pressure regulating box includes a box body, a horizontal air inlet pipe inside the box body, an air inlet valve connected to the air inlet pipe, the air inlet pipe being connected to a vertical pressure regulating pipe via an anti-clogging elbow, two sets of pressure gauges and pressure regulating valves being installed on the pressure regulating pipe, the pressure gauges and pressure regulating valves being arranged alternately on the pressure regulating pipe, the ventilation pipe of the pressure regulating valves being vertically downward, the pressure regulating pipe being connected to an outlet pipe via a filter to form a U-shape, and a meter being connected to the outlet pipe.

[0005] Preferably, the anti-clogging elbow includes a hot flow pipe, an elbow body and a water collection connector. The two ends of the elbow body are respectively connected to an air inlet pipe and a pressure regulating pipe. The inner end of the hot flow pipe is inserted into the elbow body, and the outer end extends to the outside of the elbow body. The hot flow pipe is filled with a phase change material. The water collection connector is connected to the lower part of the elbow body through a flange.

[0006] Preferably, an electric heating wire is wound around the outer end of the heat flow tube.

[0007] Preferably, the phase change material inside the heat flow tube is paraffin.

[0008] Preferably, a dustproof net is provided at the outlet of the ventilation duct.

[0009] The advantages of this utility model are: an anti-blocking elbow is integrated between the gas inlet pipe and the pressure regulating pipe, which prevents internal ice blockage, avoids ice blockage from affecting downstream gas use, and ensures the safety of natural gas transportation. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a novel pressure regulating box structure for a natural gas pipeline, as shown in one embodiment. 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 natural gas pipeline pressure regulating box includes a box body 1. A horizontal inlet pipe 2 is installed inside the box body 1, and an inlet balloon valve 3 is connected to the inlet pipe 2. The inlet pipe 2 is connected to a vertical pressure regulating pipe 5 via an anti-blocking elbow 4. Two sets of pressure gauges 7 and pressure regulating valves 8 are installed on the pressure regulating pipe 5, with the pressure gauges 7 and pressure regulating valves 8 arranged alternately on the pressure regulating pipe 5. The ventilation pipe 81 of the pressure regulating valve 8 is vertically downward. The pressure regulating pipe 5 is connected to an outlet pipe 10 via a filter 9, forming a U-shape. A meter 6 is connected to the outlet pipe 10. Specifically, the box body 1 protects the pipeline and its components. The inlet pipe 2 extends into the box body 1, is horizontally arranged, and is equipped with an inlet balloon valve 3 to control the flow of natural gas, facilitating regular maintenance of the components inside the box body 1. The inlet pipe connects to the pressure regulating pipe 5 via an anti-blocking elbow 4. The anti-blocking elbow 4 prevents ice blockage, avoiding moisture condensation that could clog the pipe and affect downstream users' gas supply. The pressure regulating pipe 5 is vertically installed, diverting the natural gas flow. Moisture flowing in the pipeline easily collects at the anti-blocking elbow 4 under its own gravity. Simultaneously, the vertical installation of the pressure regulating pipe 5 facilitates the vertical installation of the integrated pressure regulating valve 8, ensuring the vent pipe 81 of the valve faces downwards for drainage and rapid dispersion of exhaust gas during ventilation. Two sets of pressure regulating valves 8 and two sets of pressure gauges 7 are staggered to provide gradient pressure reduction for the natural gas. The pressure regulating pipe 5, filter 9, and outlet pipe 10 form a U-shape, allowing the filter 9 to be installed horizontally to filter particulate matter from the natural gas. A meter 6 is installed on the outlet pipe 10 to detect the output natural gas flow rate.

[0015] like Figure 1 As shown, the anti-clogging elbow 4 includes a hot flow pipe 41, an elbow body 42, and a water collection connector 43. The elbow body 42 is connected at both ends to the air inlet pipe 2 and the pressure regulating pipe 5, respectively. The inner end of the hot flow pipe 41 is inserted into the elbow body 42, and the outer end extends to the outside of the elbow body 42. The hot flow pipe 41 is filled with a phase change material. The water collection connector 43 is connected to the lower part of the elbow body 42 via a flange. Specifically, one end of the hot flow pipe 41 is inserted into the elbow body 42, and the other end is outside. The interior is filled with a phase change material to transfer heat and prevent the natural gas from freezing when passing through the elbow body 42. Only water remains. Because the natural gas flows from bottom to top, the water droplets, under their own gravity, deposit at the bottom of the elbow body 42 and flow down the elbow body 42 into the water collection connector 43, where they accumulate, preventing water from flowing back into the horizontal air inlet pipe 2. Maintenance personnel periodically disassemble the water inlet connector 43 and clean out the water inside.

[0016] Specifically, an electric heating wire is wound around the outer end of the heat flow tube 41. When the temperature sensor detects that the phase change material inside the heat flow tube 41 is icing, the electric heating wire is energized to melt the phase change material inside the heat flow tube 41 and transfer the heat through the heat flow tube to the inner end of the heat flow tube 41, thus preventing large-area icing at the inner end of the heat flow tube 41 and blocking the elbow body 42.

[0017] Specifically, the phase change material inside the heat flow pipe 41 is paraffin wax.

[0018] Specifically, a dustproof screen is installed at the outlet of the ventilation pipe 81 to prevent dust from entering and clogging the ventilation pipe 81.

[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 novel pressure regulating box for natural gas pipelines, characterized in that: The device includes a housing, inside which is a horizontal air inlet pipe connected to an air inlet valve. The air inlet pipe is connected to a vertical pressure regulating pipe via an anti-clogging elbow. The pressure regulating pipe is equipped with two sets of pressure gauges and pressure regulating valves, which are staggered on the pressure regulating pipe. The ventilation pipe of the pressure regulating valve is vertically downward. The pressure regulating pipe is connected to an air outlet pipe via a filter, forming a U-shape. A meter is connected to the air outlet pipe.

2. The novel natural gas pipeline pressure regulating box as described in claim 1, characterized in that: The anti-clogging elbow includes a hot flow pipe, an elbow body, and a water collection connector. The two ends of the elbow body are connected to an air inlet pipe and a pressure regulating pipe, respectively. The inner end of the hot flow pipe is inserted into the elbow body, and the outer end extends to the outside of the elbow body. The hot flow pipe is filled with a phase change material. The water collection connector is connected to the lower part of the elbow body through a flange.

3. A novel natural gas pipeline pressure regulating box as described in claim 2, characterized in that: An electric heating wire is wound around the outer end of the heat flow tube.

4. A novel natural gas pipeline pressure regulating box as described in claim 2, characterized in that: The phase change material inside the heat flow tube is paraffin.

5. A novel natural gas pipeline pressure regulating box as described in claim 1, characterized in that: A dustproof net is installed at the outlet of the ventilation duct.

Images