A pressure regulating device for oil and gas pipelines

Abstract

The utility model provides an automatic pressure regulating petroleum gas pipeline pressure stabilizing device, including connecting sleeve and series pressure stabilizing component, the inside of connecting sleeve is equipped with petroleum gas flow channel, series pressure stabilizing component includes primary pressure stabilizer, communicating hose and secondary pressure stabilizer. Primary pressure stabilizer is equipped with primary pressure stabilizing chamber, primary pressure chamber and primary sliding baffle between them, secondary pressure stabilizer is equipped with secondary pressure stabilizing chamber, secondary pressure chamber and secondary sliding baffle, and primary pressure relief hole communicates with secondary pressure stabilizing chamber through communicating hose. Primary pressure chamber is equipped with primary compression spring, and secondary pressure chamber is equipped with secondary compression spring, and the elastic coefficient of primary compression spring is greater than secondary compression spring. Through the series cooperation of primary and secondary pressure stabilizer, can automatically regulate output pressure when input pressure fluctuation, realizes the multistage pressure stabilization and dynamic balance of petroleum gas.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas transportation technology, specifically referring to an automatic pressure regulating device for petroleum gas pipelines. Background Technology

[0002] Liquefied petroleum gas (LPG), as a high-energy fuel medium, is widely used in industrial combustion, residential gas supply, and pressurized transportation. However, due to frequent fluctuations in the gas supply pressure, direct entry of LPG into pipeline systems can easily cause pressure instability and airflow impact, leading to decreased combustion efficiency or increased safety hazards in downstream equipment. Existing pressure stabilizing devices are mostly single-stage structures, capable of adjusting pressure only within a limited range. Their stabilizing effect significantly decreases when the input pressure changes considerably. Furthermore, some devices are complex in structure, difficult to maintain, and lack automatic adjustment and multi-stage pressure distribution, failing to meet the higher stability and safety requirements of modern LPG transportation systems.

[0003] Therefore, there is an urgent need for a compact oil and gas pipeline pressure stabilizing device that can automatically adapt to changes in input pressure and achieve multi-stage pressure stabilization, so as to improve the safety of system operation and the accuracy of pressure control. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides an automatic pressure regulating device for liquefied petroleum gas pipelines, so as to at least partially solve the above-mentioned technical problems.

[0005] The technical solution adopted by this utility model is as follows: This utility model proposes an automatic pressure regulating device for liquefied petroleum gas pipelines, including a connecting sleeve and a series pressure regulating assembly. The connecting sleeve is disposed on a pipeline mounting base, and the series pressure regulating assembly is disposed on the connecting sleeve. The connecting sleeve has an liquefied petroleum gas flow channel inside. The series pressure regulating assembly includes a primary pressure regulator, a connecting hose, and a secondary pressure regulator. The primary and secondary pressure regulators are disposed on the connecting sleeve. The primary pressure regulator has a primary pressure regulating chamber and a primary pressure chamber inside, with a primary sliding partition slidably disposed between the primary pressure regulating chamber and the primary pressure chamber. The primary pressure regulating chamber is internally connected to the liquefied petroleum gas flow channel, and the primary pressure chamber has a primary pressure relief hole. The secondary pressure regulator has a secondary pressure regulating chamber and a secondary pressure chamber inside, with a secondary sliding partition slidably disposed between the secondary pressure regulating chamber and the secondary pressure chamber. The primary pressure relief hole is connected to the secondary pressure regulating chamber through the connecting hose.

[0006] Furthermore, the series voltage stabilizing assembly includes a voltage stabilizing tube, which is disposed in the oil flow channel. The voltage stabilizing tube is a hollow pipe and is connected to the primary voltage stabilizing chamber. The voltage stabilizing tube is provided with an array of through holes.

[0007] Furthermore, the connecting sleeve is provided with end flanges at both ends, and the end flanges are provided with threaded holes.

[0008] Furthermore, the secondary voltage stabilizing chamber is provided with a secondary pressure relief hole, which is connected to another secondary voltage stabilizing chamber.

[0009] Furthermore, a primary compression spring is provided in the primary pressure chamber, and the primary compression spring is fixedly connected to the primary sliding partition; a secondary compression spring is provided in the secondary pressure chamber, and the secondary compression spring is fixedly connected to the secondary sliding partition; the elastic coefficient of the primary compression spring is greater than that of the secondary compression spring.

[0010] Compared with the prior art, the present invention has the following advantages: By connecting the primary and secondary pressure regulators in series, multi-stage pressure stabilization of liquefied petroleum gas is achieved. It can automatically adjust the output pressure when the input pressure fluctuates, so as to keep the gas pressure in the pipeline stable and improve the safety and reliability of the system operation. The structure of sliding baffle and connecting hose can realize automatic pressure balancing and graded pressure relief. It has a compact structure, is easy to install, and is suitable for various liquefied petroleum gas transmission pipelines. Attached Figure Description

[0011] Figure 1 A perspective view of an automatic pressure regulating device for liquefied petroleum gas pipelines, as proposed in an embodiment of this utility model; Figure 2 This is a front view of an automatic pressure regulating oil gas pipeline pressure stabilizing device proposed in an embodiment of the present invention; Figure 3 This is a top view of an automatic pressure regulating oil gas pipeline pressure stabilizing device according to an embodiment of the present invention; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 for Figure 4 Enlarged view of point I in the middle; Figure 6 This is a cross-sectional schematic diagram of the automatic pressure regulating oil and gas pipeline pressure stabilizing device proposed in an embodiment of this utility model.

[0012] Among them, 100 is the connecting sleeve, 200 is the series pressure stabilizing assembly, 101 is the oil flow channel, 102 is the end flange, 103 is the threaded hole, 201 is the primary pressure stabilizer, 202 is the connecting hose, 203 is the secondary pressure stabilizer, 204 is the pressure stabilizing pipe, 205 is the primary pressure stabilizing chamber, 206 is the primary pressure chamber, 207 is the primary sliding partition, 208 is the primary pressure relief hole, 209 is the primary compression spring, 210 is the secondary pressure stabilizing chamber, 211 is the secondary pressure chamber, 212 is the secondary sliding partition, 213 is the secondary pressure relief hole, 214 is the secondary compression spring, and 215 is the connecting hole.

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] like Figures 1-6As shown, this embodiment includes a connecting sleeve 100 and a series pressure stabilizing assembly 200. The connecting sleeve 100 is fixedly installed on a pipe mounting base, and the series pressure stabilizing assembly 200 is located above the connecting sleeve 100. The connecting sleeve 100 has an internal liquefied petroleum gas (LPG) gas flow channel 101 for LPG input and flow guidance. The series pressure stabilizing assembly 200 includes a primary pressure regulator 201, a connecting hose 202, and a secondary pressure regulator 203. Both the primary pressure regulator 201 and the secondary pressure regulator 203 are located on the connecting sleeve 100 and are interconnected via the connecting hose 202. The primary pressure regulator 201 has an internal primary pressure stabilizing chamber 205 and a primary pressure chamber 206. The primary pressure stabilizing chamber 205 is connected to the LPG gas flow channel 101 and can receive raw high-pressure LPG from a gas source. A primary sliding baffle 207 is slidably connected between the primary pressure stabilizing chamber 205 and the primary pressure chamber 206. This baffle automatically adjusts its opening according to pressure changes within the chamber, thereby achieving initial pressure reduction and stabilization. A primary pressure relief hole 208 is provided on the primary pressure chamber 206 to release some gas when the pressure exceeds a set value, preventing damage caused by excessive pressure within the chamber.

[0017] The secondary pressure regulator 203 internally comprises a secondary pressure regulating chamber 210 and a secondary pressure chamber 211, with a secondary sliding baffle 212 slidably positioned between the two chambers. The primary pressure relief port 208 is connected to the secondary pressure regulating chamber 210 via a connecting hose 202, allowing gas vented from the primary pressure regulator 201 to enter the secondary pressure regulating chamber 210 for secondary pressure stabilization. The series connection of the primary pressure regulator 201 and the secondary pressure regulator 203 enables multi-stage pressure regulation, resulting in more stable output liquefied petroleum gas pressure. It not only automatically adjusts the pressure stabilization effect under different input pressure conditions but also achieves dynamic pressure balance through the linkage between the sliding baffle and the chamber, ensuring continuous, safe, and efficient operation of the liquefied petroleum gas pipeline.

[0018] The series voltage stabilizing assembly 200 proposed in this embodiment includes a voltage stabilizing tube 204, which is disposed in the oil and gas flow channel 101 and communicates with the primary voltage stabilizing chamber 205. The voltage stabilizing tube 204 is a hollow tubular structure with an internal gas buffer channel, which plays a role in equalizing pressure and guiding flow when oil and gas flow through it. The voltage stabilizing tube 204 is made of corrosion-resistant composite material, which can work stably for a long time in high-pressure, oil and gas-containing environments, preventing deformation and blockage caused by gas impact or impurity corrosion.

[0019] The pressure stabilizing pipe 204 has a series of through holes 215 arrayed on its wall, with each through hole 215 evenly distributed along the axial direction of the pipe. When gas passes through the pressure stabilizing pipe 204, it can exchange pressure with the primary pressure stabilizing chamber 205 via the through holes 215, thereby effectively dispersing the airflow impact force and reducing pressure fluctuations. This structure allows the liquefied petroleum gas to be diverted and depressurized before entering the primary pressure stabilizing chamber 205, achieving pre-regulation and buffering of pressure, making the overall pressure stabilization process more stable and reliable, and improving the pressure stabilization response speed and gas output stability of the pipeline system.

[0020] The connecting sleeve 100 proposed in this embodiment is provided with end flanges 102 at both ends, and each end flange 102 is provided with threaded holes 103. By providing end flanges 102 at both ends, quick connection and sealing fixation with external liquefied petroleum gas transmission pipelines can be achieved. The threaded holes 103 are used to install bolts so that the connecting sleeve 100 can be firmly connected to the pipeline flange, ensuring that no loosening or leakage occurs during high-pressure gas transmission.

[0021] Furthermore, the end flange 102 and the connecting sleeve 100 adopt an integral casting structure, which has high airtightness and mechanical strength. The flange threaded connection not only facilitates installation, disassembly and maintenance, but also allows for quick separation when pressure fluctuations occur in the pipeline system or maintenance is required, improving the installation flexibility and long-term reliability of the device.

[0022] The secondary pressure-stabilizing chamber 210 proposed in this embodiment is provided with a secondary pressure relief hole 213, which is connected to another adjacent secondary pressure-stabilizing chamber 210. By setting a connecting pressure relief hole 213 between the secondary pressure-stabilizing chambers 210, pressure balance between multiple chambers can be achieved during device operation. When the pressure in a certain chamber rises to a set threshold, some gas can be introduced into the adjacent chamber through the pressure relief hole 213, thereby dispersing the local high pressure and preventing structural damage or sealing failure caused by excessive pressure.

[0023] The orifice diameter of the secondary pressure relief port 213 is precisely set according to the pressure of the pressure stabilization system, ensuring a smooth and controllable gas release process. This guarantees both the sensitivity of the pressure stabilization response and avoids flow fluctuations caused by sudden gas leakage. The multi-chamber interconnected pressure relief structure further enhances the pressure stability of the secondary pressure regulator 203, resulting in a more balanced and reliable LPG output and improving the overall safe operation of the pipeline system.

[0024] In this embodiment, a primary compression spring 209 is provided in the primary pressure chamber 206. The primary compression spring 209 is fixedly connected to the primary sliding partition 207 and is used to provide a return force for the primary sliding partition, so that the primary pressure regulator can automatically return to the equilibrium position when the air pressure changes. A secondary compression spring 214 is provided in the secondary pressure chamber 211. The secondary compression spring 214 is fixedly connected to the secondary sliding partition 212 and is used to provide auxiliary spring force in the secondary pressure stabilization stage to realize secondary pressure regulation.

[0025] The primary compression spring 209 has a higher elastic coefficient than the secondary compression spring 214, giving the primary pressure regulator 201 stronger pressure resistance and adjustment stiffness, enabling it to withstand the impact of high-pressure gas and perform coarse pressure stabilization. The secondary pressure regulator 203, on the other hand, achieves fine pressure stabilization in the lower pressure range. By combining different elastic coefficients, precise control of graded pressure stabilization can be achieved, making the gas pressure regulation process smoother and ensuring stable and reliable liquefied petroleum gas output.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A pressure stabilizing device for an automatically regulating liquefied petroleum gas pipeline, characterized in that: It includes a connecting sleeve (100) and a series pressure stabilizing assembly (200), wherein the connecting sleeve (100) is disposed on a pipe mounting base, and the series pressure stabilizing assembly (200) is disposed on the connecting sleeve (100); The connecting sleeve (100) is provided with an oil flow channel (101) inside. The series pressure stabilizing assembly (200) includes a primary pressure stabilizer (201), a connecting hose (202), and a secondary pressure stabilizer (203). The primary pressure stabilizer (201) and the secondary pressure stabilizer (203) are mounted on the connecting sleeve (100). The primary pressure stabilizer (201) is provided with a primary pressure stabilizing chamber (205) and a primary pressure chamber (206). A primary sliding partition (207) is slidably provided between the primary pressure stabilizing chamber (205) and the primary pressure chamber (206). The primary pressure stabilizing chamber (205) is connected to the oil flow channel (101). The primary pressure chamber (206) is provided with a primary pressure relief hole (208). The secondary voltage regulator (203) has a secondary voltage regulating chamber (210) and a secondary pressure chamber (211) inside. A secondary sliding partition (212) is slidably provided between the secondary voltage regulating chamber (210) and the secondary pressure chamber (211). The primary pressure relief hole (208) is connected to the secondary voltage regulating chamber (210) through a connecting hose (202).

2. The automatic pressure regulating liquefied petroleum gas pipeline pressure stabilizing device according to claim 1, characterized in that: The series voltage stabilizing assembly (200) includes a voltage stabilizing tube (204), which is located in the oil flow channel (101). The voltage stabilizing tube (204) is a hollow pipe and is connected to the primary voltage stabilizing chamber (205). The voltage stabilizing tube (204) is provided with an array of through holes (215).

3. The automatic pressure regulating liquefied petroleum gas pipeline pressure stabilizing device according to claim 1, characterized in that: The connecting sleeve (100) has end flanges (102) at both ends, and the end flanges (102) have threaded holes (103).

4. The automatic pressure regulating liquefied petroleum gas pipeline pressure stabilizing device according to claim 1, characterized in that: The secondary voltage regulator chamber (210) is provided with a secondary pressure relief hole (213), which is connected to another secondary voltage regulator chamber (210).

5. The automatic pressure regulating liquefied petroleum gas pipeline pressure stabilizing device according to claim 1, characterized in that: The primary pressure chamber (206) is provided with a primary compression spring (209), and the primary compression spring (209) and the primary sliding partition (207) are fixedly connected; the secondary pressure chamber (211) is provided with a secondary compression spring (214), and the secondary compression spring (214) and the secondary sliding partition (212) are fixedly connected. The elastic coefficient of the primary compression spring (209) is greater than that of the secondary compression spring (214).

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