Anti-gas-blocking structure of petroleum pipeline

Abstract

The utility model discloses an anti-gas-blocking structure of a petroleum pipeline, which relates to the field of petroleum pipelines and comprises a pipeline main body provided with an exhaust hole used for being connected with an exhaust device. The sealing connecting piece is arranged on the outer side of the exhaust hole of the pipeline main body and is connected with the exhaust hole at the same time; the exhaust mechanism is mounted on the sealing connecting piece; and the pressure reducing mechanism is mounted on the sealing connecting piece, and the pressure reducing mechanism is connected with the exhaust mechanism. According to the sealing connecting piece, the arc-shaped plate is attached to the curved surface of the pipeline body to form mechanical limiting, a triple sealing structure of the inner side sealing gasket and the sealing sleeve is matched, oil and gas leakage is effectively prevented, when gas is accumulated in the pipeline, the gas enters the exhaust pipe through the exhaust hole and is collected to the one-way exhaust valve through the three-way connector, and the gas leakage is avoided. The valve plate is automatically opened to exhaust gas by utilizing gas pressure, so that the problem of mechanical lag of gear transmission in the prior art is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of oil pipeline technology, specifically, it relates to an anti-gas-blocking structure for oil pipelines. Background Technology

[0002] An oil pipeline consists of many sets of oil transport pipes. When a circulating pump pressurizes the oil in the pipeline, the oil circulates without air bubbles. If, for some reason, the circulating oil is lost, a large amount of gas will remain in the upper part of the pipeline. Since air is less dense than oil, the oil at the high-pressure end is blocked because it cannot compress the air, preventing the oil in this pipeline from circulating.

[0003] Utility model patent CN221857922U discloses an anti-gas-blocking device for oil pipelines, comprising: an oil pipeline, an exhaust pipe at the upper end of the oil pipeline, and a first fixed plate and a second fixed plate respectively at opposite ends of the exhaust pipe. Through a rotating gear, when gas enters the exhaust pipe, the gas drives the rotating gear to rotate, causing the second blocking plate to move inwards towards the exhaust pipe, thereby expelling the gas from the oil pipeline. If oil enters the exhaust pipe, it causes a sliding frame to move upwards, preventing the oil from overflowing from the exhaust pipe. Furthermore, when the oil flow rate in the pipeline slows down, the oil in the exhaust pipe flows back into the oil pipeline through a one-way valve, thus separately treating the air and oil in the exhaust pipe.

[0004] However, existing anti-airlock devices control exhaust by meshing a rotating gear with a push rod. This mechanical transmission structure is prone to jamming or wear under the complex conditions of oil pipelines. For example, solid particles in the oil may become embedded in the gear meshing gap, preventing the rotating gear from rotating properly. This, in turn, prevents the first and second blocking plates from working together, causing the exhaust function to fail. Simultaneously, the return spring, exposed to the oil and gas environment for extended periods, may corrode, leading to elasticity loss and affecting the automatic reset accuracy of the blocking plates. This poses a risk of airlock due to mechanical failure. Therefore, this invention is proposed to address these issues. Utility Model Content

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] An anti-gas-clogging structure for oil pipelines includes:

[0007] The pipe body has an exhaust hole for connecting an exhaust device;

[0008] A sealing connector is provided on the outside of the vent hole of the pipe body to seal the vent hole and connect to it.

[0009] An exhaust mechanism, which is mounted on a sealing connector, is used to exhaust gas from the main body of the pipe.

[0010] A pressure-reducing mechanism is installed on a sealing connector and is connected to an exhaust mechanism for reducing the pressure of oil that is under excessive pressure.

[0011] Preferably, the sealing connector includes an installation plate disposed on the outside of the pipe body, with multiple equally spaced connecting plates fixed on both sides of the installation plate, and an arc-shaped plate connected to the end of the connecting plate by bolts. The arc-shaped plate fits against the pipe body, and the arc-shaped plate and the connecting plates cooperate to limit the installation plate on the pipe body.

[0012] Preferably, a sealing gasket is adhered to the inner side of the mounting plate, the sealing gasket is in contact with the main body of the pipe, an air extraction pipe is fixed in the middle of the inner side of the mounting plate, the air extraction pipe is located in the exhaust hole, a sealing sleeve is provided between the air extraction pipe and the exhaust hole, and the sealing sleeve is connected to the sealing gasket.

[0013] Preferably, the exhaust mechanism includes a three-way connector fixed to the middle of the upper surface of the mounting plate, both ends of the three-way connector being connected to a pressure reducing mechanism, a one-way exhaust valve being fixed to the top of the three-way connector, and an exhaust pipe being connected to the output end of the one-way exhaust valve.

[0014] Preferably, the pressure reducing mechanism includes fixed sleeves fixed to both ends of the upper surface of the mounting plate, and the fixed sleeves have pressure reducing chambers inside for reducing the pressure of the oil.

[0015] Preferably, a piston is provided inside the pressure relief chamber, a spring is fixed to one end of the piston, a stud is provided at the end of the spring away from the piston, the stud is connected to the opening of the pressure relief chamber by internal and external threads, and a retaining ring is fixed to the outside of the stud.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The sealing connector of this utility model forms a mechanical limit by fitting the arc plate with the curved surface of the pipe body. Combined with the triple sealing structure of the inner sealing gasket and sealing sleeve, it effectively prevents oil and gas leakage. When gas accumulates in the pipe, the gas enters the suction pipe through the exhaust hole and is collected to the one-way exhaust valve through the three-way connector. The valve plate is automatically opened to exhaust gas by the gas pressure, avoiding the mechanical lag problem of gear transmission in the prior art. At the same time, the interference fit design between the suction pipe and the exhaust hole ensures unidirectional gas flow and prevents oil backflow into the exhaust mechanism, thereby improving the stability and sealing of the exhaust process.

[0018] The pressure-reducing mechanism of this invention, through the linkage design of piston, spring and stud, can automatically adjust the pressure relief threshold according to the pressure inside the pipeline. When the oil pressure exceeds the set value, the piston compresses the spring to open the pressure-reducing chamber, releasing some high-pressure oil to the fixed sleeve, thus achieving dynamic pressure relief. After the pressure decreases, the spring pushes the piston to reset, restoring the sealing state. The pre-compression amount of the spring can be changed by rotating the stud, flexibly adapting to the pipeline requirements of different pipe diameters and conveying pressures, avoiding the limitations of fixed threshold pressure reduction in the prior art. In addition, the connection design between the pressure-reducing chamber and the exhaust mechanism can simultaneously discharge the gas released during the pressure reduction process, further improving the anti-gas blockage efficiency and reducing pipeline vibration and equipment wear caused by pressure fluctuations.

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the sealing connector structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the exhaust mechanism of this utility model.

[0024] Figure 4 This is a schematic diagram of the pressure reduction mechanism of this utility model.

[0025] In the diagram: Pipe body 1, sealing connector 2, mounting plate 21, connecting plate 22, arc plate 23, sealing gasket 24, sealing sleeve 25, suction pipe 26, exhaust mechanism 3, tee connector 31, one-way exhaust valve 32, exhaust pipe 33, pressure reducing mechanism 4, fixing sleeve 41, pressure reducing chamber 42, piston 43, spring 44, stud 45, retaining ring 46. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0027] like Figures 1 to 4 As shown, an anti-gas-blocking structure for an oil pipeline includes a pipeline body 1, a sealing connector 2, an exhaust mechanism 3, and a pressure reducing mechanism 4. The pipeline body 1 has an exhaust hole for connecting an exhaust device.

[0028] Specifically, the sealing connector 2 is disposed on the outside of the vent hole of the pipe body 1 to seal the vent hole and connect to it. The sealing connector 2 includes a mounting plate 21 disposed on the outside of the pipe body 1. Multiple connecting plates 22 are fixed on both sides of the mounting plate 21 at equal intervals. An arc-shaped plate 23 is bolted to the end of the connecting plate 22. The arc-shaped plate 23 fits against the pipe body 1. The arc-shaped plate 23 and the connecting plates 22 cooperate to limit the mounting plate 21 on the pipe body 1. A sealing gasket 24 is adhered to the inner side of the mounting plate 21. The sealing gasket 24 and the pipe body 1 are connected to each other. The main body 1 of the pipe is fitted together. An extraction pipe 26 is fixed to the inner center of the mounting plate 21. The extraction pipe 26 is located inside the exhaust hole. A sealing sleeve 25 is provided between the extraction pipe 26 and the exhaust hole. The sealing sleeve 25 is connected to the sealing gasket 24. The mounting plate 21 of the sealing connector 2 is fixed to the outside of the main body 1 of the pipe by bolts to the connecting plates 22 on both sides and the arc plate 23. The arc plate 23 fits against the curved surface of the pipe to form a mechanical limit. The inner sealing gasket 24 fills the gap between the mounting plate 21 and the pipe. The extraction pipe 26 is inserted into the exhaust hole of the pipe and is press-fitted with the sealing sleeve 25 to ensure unidirectional gas flow. When the gas in the pipe accumulates to form a gas column, the gas enters the extraction pipe 26 through the exhaust hole and is collected by the three-way connector 31 to the one-way exhaust valve 32 to achieve continuous exhaust.

[0029] Specifically, the exhaust mechanism 3 is installed on the sealing connector 2 and is used to discharge the gas in the main body of the pipeline 1. The exhaust mechanism 3 includes a three-way connector 31 fixed in the middle of the upper surface of the mounting plate 21. The bottom of the three-way connector 31 is connected to the suction pipe 26. Both ends of the three-way connector 31 are connected to the pressure reducing mechanism 4. A one-way exhaust valve 32 is fixed on the top of the three-way connector 31. The output end of the one-way exhaust valve 32 is connected to the exhaust pipe 33. When the gas pressure reaches the opening pressure of the one-way exhaust valve 32, the valve plate opens automatically and the gas is discharged through the exhaust pipe 33.

[0030] More specifically, the pressure-reducing mechanism 4 is installed on the sealing connector 2 and connected to the exhaust mechanism 3. It is used to reduce the pressure of excessively pressurized oil. The pressure-reducing mechanism 4 includes fixed sleeves 41 at both ends of the upper surface of the mounting plate 21. A pressure-reducing chamber 42 is opened inside the fixed sleeves 41 for reducing oil pressure. A piston 43 is installed inside the pressure-reducing chamber 42. A spring 44 is fixed to one end of the piston 43, and a stud 45 is installed at the end of the spring 44 away from the piston 43. The stud 45 is connected to the opening of the pressure-reducing chamber 42 by internal and external threads. A fixing ring 46 is fixed to the outside of the stud 45. If the pressure in the pipeline rises abnormally, the piston 43 of the pressure-reducing mechanism 4 compresses the spring 44 under the action of the oil pressure, moving towards the stud 45, opening the communication channel between the pressure-reducing chamber 42 and the pipeline, allowing some oil to flow into the pressure-reducing chamber 42 to relieve pressure. After the pressure decreases, the spring 44 pushes the piston 43 back to its original position, restoring the sealing state. By rotating the stud 45 to change the pre-compression of the spring 44, different pressure-reducing start pressures can be set to adapt to different operating conditions.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas-blocking prevention structure for oil pipelines, characterized in that, include: The pipe body has an exhaust hole for connecting an exhaust device; A sealing connector is disposed on the outside of the vent hole of the pipe body to seal the vent hole and connect to the vent hole. An exhaust mechanism, which is mounted on a sealing connector, is used to exhaust gas from the main body of the pipeline. A pressure-reducing mechanism is installed on a sealing connector and is connected to an exhaust mechanism for reducing the pressure of oil that is under excessive pressure.

2. The anti-gas-blocking structure for an oil pipeline according to claim 1, characterized in that, The sealing connector includes an installation plate disposed on the outside of the pipe body. Multiple connecting plates are fixed on both sides of the installation plate at equal intervals. An arc-shaped plate is bolted to the end of the connecting plate. The arc-shaped plate fits against the pipe body. The arc-shaped plate and the connecting plate cooperate to limit the installation plate on the pipe body.

3. The anti-gas-blocking structure for oil pipelines according to claim 2, characterized in that, A sealing gasket is bonded to the inner side of the mounting plate, and the sealing gasket is in contact with the main body of the pipe. An air extraction pipe is fixed in the middle of the inner side of the mounting plate. The air extraction pipe is located in the exhaust hole. A sealing sleeve is provided between the air extraction pipe and the exhaust hole. The sealing sleeve is connected to the sealing gasket.

4. The anti-gas-blocking structure for oil pipelines according to claim 1, characterized in that, The exhaust mechanism includes a three-way connector fixed to the middle of the upper surface of the mounting plate. Both ends of the three-way connector are connected to the pressure reducing mechanism. A one-way exhaust valve is fixed to the top of the three-way connector, and the output end of the one-way exhaust valve is connected to an exhaust pipe.

5. The anti-gas-blocking structure for an oil pipeline according to claim 1, characterized in that, The pressure reducing mechanism includes fixed sleeves at both ends of the upper surface of the mounting plate, and the fixed sleeves have pressure reducing chambers inside for reducing the pressure of oil.

6. The anti-gas-blocking structure for an oil pipeline according to claim 5, characterized in that, A piston is installed inside the pressure relief chamber. A spring is fixed to one end of the piston. A stud is installed at the end of the spring away from the piston. The stud is connected to the opening of the pressure relief chamber by internal and external threads. A retaining ring is fixed to the outside of the stud.

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