Safety valve for petroleum pipeline

Abstract

The utility model discloses a safety valve for a petroleum pipeline, which relates to the technical field of petroleum safety valves and comprises a safety valve body, the safety valve body comprises a negative pressure pipeline, a pressure relief pipeline and a first sealing ring, and the first sealing ring is positioned above the joint of the negative pressure pipeline and the pressure relief pipeline; a sealing valve body is arranged at the top of the negative pressure pipeline, a valve element is arranged in the negative pressure pipeline, and a sealing rubber strip is arranged at the end, close to the sealing valve body, of the negative pressure pipeline. A push rod is arranged at the top of the valve core; the sealing valve body comprises a sealing pipeline and a second sealing ring; a hand wheel lead screw component is arranged at the top of the sealing pipeline, a tightening nut is arranged on the outer side of the sealing pipeline, and a sealing pressing block is arranged on the inner side of the sealing pipeline. A movable block is arranged at the bottom of the sealing pressing block and located above the second sealing ring. By means of the structure, the pressure intensity inside the sealing valve body can be rapidly adjusted, then safety protection of oil pipelines with different pressures is achieved, and the stability of the safety valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil safety valves, and particularly relates to a safety valve for an oil pipeline. Background Technique

[0002] Oil is a viscous, dark brown liquid, known as the "blood of industry". The main components of oil are mixtures of various alkanes, cycloalkanes, and aromatic hydrocarbons, and it is one of the main objects of geological exploration. With the development of modernization, oil plays a key role in various fields. Oil transportation is an important link in the oil industry chain, mainly including two parts: crude oil transportation and refined oil transportation. There are various transportation methods, mainly including sea transportation, pipeline transportation, and railway transportation, etc. During pipeline transportation, safety valves are required to protect the oil pipeline to prevent the internal pressure of the transportation pipeline from being too high, resulting in the rupture of the transportation pipeline.

[0003] Most existing safety valves for oil pipelines apply pressure to the valve core by using springs, and then achieve the pressure control of the safety valve. Such a safety valve can only be applied to oil pipelines with one kind of pressure, and after long-term use, the springs are prone to fatigue, resulting in a decrease in the internal pressure of the safety valve and affecting the sealing performance of the safety valve. Therefore, we propose a tire grinding machine to solve the problems mentioned above. Content of the Utility Model

[0004] The purpose of the utility model is to provide a safety valve for an oil pipeline to solve the problem that most existing safety valves for oil pipelines apply pressure to the valve core by using springs. The pressure applied in this way is fixed, and after long-term use, the springs are prone to fatigue, resulting in a decrease in the internal pressure of the safety valve and affecting the sealing performance of the safety valve as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A safety valve for an oil pipeline, including a safety valve body. The safety valve body includes a negative pressure pipeline, a pressure relief pipeline, and a first sealing ring, and the first sealing ring is located above the junction of the negative pressure pipeline and the pressure relief pipeline. A sealing valve body is arranged at the top of the negative pressure pipeline, a valve core is arranged inside the negative pressure pipeline, a sealing rubber strip is arranged at one end of the negative pressure pipeline close to the sealing valve body, and a push rod is arranged at the top of the valve core;

[0007] The sealing valve body includes a sealing pipeline and a second sealing ring. A handwheel screw component is arranged at the top of the sealing pipeline, a tightening nut is arranged on the outer side of the sealing pipeline, a sealing pressure block is arranged on the inner side of the sealing pipeline, and a movable block is arranged at the bottom of the sealing pressure block, and the movable block is located above the second sealing ring.

[0008] Further, a pressure relief pipe is disposed on one side of the negative pressure pipe in an upwardly inclined manner. The sealing rubber strip is fixedly connected to the top of the negative pressure pipe by screws, and the valve core is slidably connected inside the negative pressure pipe.

[0009] Further, a slope is provided at the bottom of the valve core, and the slope is inclined towards the side close to the pressure relief pipe. The push rod is fixedly connected to the valve core by screws, and the sealing pipe is meshed with the negative pressure pipe.

[0010] Further, the outer side of the sealing pipe is rotatably connected to a tightening nut by threads, and the other end of the tightening nut is rotatably connected to the negative pressure pipe by threads.

[0011] Further, the sealing block is slidably connected inside the sealing pipe, the movable block is slidably connected inside the sealing pipe, and the handwheel screw component includes a rotating handwheel and a screw. The screw is rotatably connected to the sealing pipe by threads, and one end of the screw passes through the sealing pipe and is rotatably connected to the sealing block.

[0012] Further, the other end of the push rod passes through the first sealing ring and the second sealing ring and is fixedly connected to the bottom of the movable block.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, by providing a sealing valve body, the sealing valve body includes a sealing pipe and a second sealing ring. A handwheel screw component is provided at the top of the sealing pipe, a sealing block is provided inside the sealing pipe, and a movable block is provided at the bottom of the sealing cover, and the movable block is located above the second sealing ring. During this process, by rotating the handwheel screw component, the internal pressure of the sealing pipe can be adjusted, thereby realizing the pressure control of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the side mounting structure of the present utility model;

[0017] Figure 3 is a schematic diagram of the partial enlarged sectional mounting structure of the present utility model;

[0018] Figure 4 is a schematic diagram of the valve core structure of the present utility model;

[0019] Reference numerals: 1, safety valve body; 101, negative pressure pipeline; 102, pressure relief pipeline; 103, first sealing ring; 2, sealing valve body; 201, sealing pipeline; 202, second sealing ring; 3, valve core; 301, inclined surface; 4, sealing rubber strip; 5, push rod; 6, handwheel screw component; 601, rotating handwheel; 602, screw rod; 7, tightening nut; 8, sealing pressure block; 9, movable block. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , the present invention provides a technical solution: a safety valve for an oil pipeline, including a safety valve body 1. The safety valve body 1 includes a negative pressure pipeline 101, a pressure relief pipeline 102 and a first sealing ring 103, and the first sealing ring 103 is located above the junction of the negative pressure pipeline 101 and the pressure relief pipeline 102. A sealing valve body 2 is provided at the top of the negative pressure pipeline 101, a valve core 3 is provided inside the negative pressure pipeline 101, a sealing rubber strip 4 is provided at one end of the negative pressure pipeline 101 close to the sealing valve body 2, and a push rod 5 is provided at the top of the valve core 3;

[0022] The sealing valve body 2 includes a sealing pipeline 201 and a second sealing ring 202. A handwheel screw component 6 is provided at the top of the sealing pipeline 201, a tightening nut 7 is provided on the outer side of the sealing pipeline 201, a sealing pressure block 8 is provided inside the sealing pipeline 201, and a movable block 9 is provided at the bottom of the sealing pressure block 8, and the movable block 9 is located above the second sealing ring 202. In this embodiment, the internal pressure of the sealing valve body 2 is adjusted by setting the handwheel screw component 6 and the sealing pressure block 8, so as to facilitate the adjustment of the safety threshold of the safety valve.

[0023] A pressure relief pipeline 102 is inclined upward on one side of the negative pressure pipeline 101. The sealing rubber strip 4 is fixedly connected to the top of the negative pressure pipeline 101 by screws, and the valve core 3 is slidably connected inside the negative pressure pipeline 101. In this embodiment, by inclining the pressure relief pipeline 102, it is more conducive to relieving the high-pressure oil inside the negative pressure pipeline 101.

[0024] A bevel surface 301 is provided at the bottom of the valve core 3, and the bevel surface 301 is inclined towards the side close to the pressure relief pipeline 102. The push rod 5 is fixedly connected to the valve core 3 by screws, and the sealing pipeline 201 is meshed and connected to the negative pressure pipeline 101. In this embodiment, by providing the bevel surface 301, the high-pressure petroleum inside the negative pressure pipeline 101 can more easily lift the valve core 3 to relieve pressure.

[0025] The outer side of the sealing pipeline 201 is rotationally connected to the tightening nut 7 through threads, and the other end of the tightening nut 7 is rotationally connected to the negative pressure pipeline 101 through threads. In this embodiment, by providing the tightening nut 7, the negative pressure pipeline 101 and the sealing pipeline 201 are tightly connected.

[0026] The sealing block 8 is slidably connected inside the sealing pipeline 201, the movable block 9 is slidably connected inside the sealing pipeline 201, the handwheel screw component 6 includes a rotating handwheel 601 and a screw 602, the screw 602 is rotationally connected to the sealing pipeline 201 through threads, and one end of the screw 602 passes through the sealing pipeline 201 and is rotationally connected to the sealing block 8.

[0027] The other end of the push rod 5 passes through the first sealing ring 103 and the second sealing ring 202 and is fixedly connected to the bottom of the movable block 9. In this embodiment, by providing the push rod 5, the pressure inside the sealing pipeline 201 is transmitted to the valve core 3, thereby realizing the pressure control of the safety valve.

[0028] Working principle: By rotating the rotating handwheel 601, the position of the sealing block 8 is adjusted, thereby adjusting the pressure inside the sealing pipeline 201. The movable block 9 descends, and the push rod 5 moves the valve core 3 to the closed position. The pressure of the petroleum inside the negative pressure pipeline 101 increases. When the pressure inside the negative pressure pipeline 101 is greater than the pressure inside the sealing pipeline 201, the petroleum lifts the valve core 3 through the bevel surface 301, and pressure relief is carried out through the pressure relief pipeline 102. When the pressure inside the negative pressure pipeline 101 is less than the pressure inside the sealing pipeline 201, the valve core 3 is pressed down by the movable block 9 and closed again.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety valve for petroleum pipeline, characterized by: The invention comprises a safety valve body (1), wherein the safety valve body (1) comprises a negative pressure pipe (101), a pressure relief pipe (102) and a first sealing ring (103), wherein the first sealing ring (103) is located above the junction of the negative pressure pipe (101) and the pressure relief pipe (102), a sealing valve body (2) is arranged on the top of the negative pressure pipe (101), a valve core (3) is arranged inside the negative pressure pipe (101), a sealing strip (4) is arranged at one end of the negative pressure pipe (101) close to the sealing valve body (2), and a push rod (5) is arranged on the top of the valve core (3); The sealing valve body (2) comprises a sealing pipe (201) and a second sealing ring (202); a handwheel screw component (6) is arranged at the top of the sealing pipe (201); a tightening nut (7) is arranged at the outside of the sealing pipe (201); a sealing pressing block (8) is arranged at the inside of the sealing pipe (201); a movable block (9) is arranged at the bottom of the sealing pressing block (8), and the movable block (9) is located above the second sealing ring (202).

2. A safety valve for petroleum pipeline according to claim 1, characterized in that: A pressure relief pipe (102) is arranged on one side of the negative pressure pipe (101) in an upwardly inclined manner, the sealing strip (4) is fixedly connected to the top of the negative pressure pipe (101) by means of screws, and the valve core (3) is slidably connected inside the negative pressure pipe (101).

3. A safety valve for petroleum pipeline according to claim 2, characterized in that: The bottom of the valve core (3) is provided with an inclined surface (301), and the inclined surface (301) is inclined toward the side close to the pressure relief pipe (102). The push rod (5) is fixedly connected to the valve core (3) by means of screws, and the sealing pipe (201) is meshedly connected to the negative pressure pipe (101).

4. A safety valve for petroleum pipeline according to claim 3, characterized in that: The outer side of the sealing pipe (201) is rotatably connected to the tightening nut (7) via a thread, and the other end of the tightening nut (7) is rotatably connected to the negative pressure pipe (101) via a thread.

5. A safety valve for petroleum pipeline according to claim 1, characterized in that: The sealing pressing block (8) is slidably connected inside the sealing pipe (201), the movable block (9) is slidably connected inside the sealing pipe (201), the hand wheel screw component (6) comprises a rotating hand wheel (601) and a screw (602), the screw (602) is rotatably connected to the sealing pipe (201) via a thread, and one end of the screw (602) passes through the sealing pipe (201) and is rotatably connected to the sealing pressing block (8).

6. A safety valve for petroleum pipeline according to claim 1, characterized in that: The other end of the push rod (5) passes through the first sealing ring (103) and the second sealing ring (202) and is fixedly connected to the bottom of the movable block (9).

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