Oil field pipeline safety valve with sealing assembly

Abstract

The utility model relates to the technical field of pipeline sealing, in particular to an oil field pipeline safety valve with a sealing assembly, which comprises a connecting pipe arranged on the side face of a safety valve main body, a sealing groove arranged on the end face of the connecting pipe, a positioning ring sleeved on the surface of the connecting pipe, and a sealing rubber pad arranged on the end face of a petroleum pipeline. The surface of the petroleum pipeline is sleeved with a positioning nut, and an extrusion spring and a sealing gasket are arranged in the positioning nut. The safety valve has the beneficial effects that firstly, a positioning nut is screwed on a positioning ring, so that a sealing rubber pad arranged on the end face of a petroleum pipeline is extruded in a sealing groove, and the petroleum pipeline is hermetically connected with a connecting pipe on the side face of the safety valve body; in the process of rotating the positioning nut, the sealing gasket can be matched with the extrusion spring to extrude to seal the joint of the connecting pipe and the petroleum pipeline, the extrusion spring is arranged to enable the sealing gasket to be in an extrusion state all the time, the sealing gasket is matched with the sealing rubber gasket, the sealing effect of the connecting pipe and the petroleum pipeline can be improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of pipeline sealing, in particular to an oilfield pipeline safety valve with a sealing component. Background Art

[0002] With the development of my country's economy, the demand for oil and natural gas has increased sharply. As the main mode of transportation of oil and natural gas, pipeline transportation plays an increasingly important role.

[0003] During the pipeline transportation of petrochemicals, if a fire or other abnormal situation occurs in a transportation pipeline, the passage of oil in the pipeline must be cut off quickly and in time to avoid fire accidents and leakage accidents. Otherwise, there will be great safety hazards. Why is there a safety valve in the middle of the oil pipeline?

[0004] However, when the traditional safety valve body is connected to the oil pipeline, a threaded connection is mainly used in combination with a sealing rubber pad to improve the sealing performance of the connection between the safety valve and the oil pipeline. However, when the sealing rubber pad is used for a long time, the rubber elasticity will be reduced, which may cause sudden leakage and affect certain safety performance. Therefore, the utility model proposes an oilfield pipeline safety valve with a sealing component to solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model aims to provide an oilfield pipeline safety valve with a sealing assembly to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: an oilfield pipeline safety valve with a sealing assembly, the safety valve comprising: a safety valve body, a connecting pipe is arranged on the side of the safety valve body, a sealing groove is opened on the end face of the connecting pipe, and a positioning ring is sleeved on the surface of the connecting pipe;

[0007] The oil pipeline, the end face of the oil pipeline is provided with a sealing rubber pad, the surface of the oil pipeline is sleeved with a positioning nut, and the positioning nut is provided with an extrusion spring and a sealing pad.

[0008] Preferably, the positioning ring is fixedly connected to the surface of the connecting pipe, a left-handed thread is provided on the surface of the positioning ring, and the positioning nut can be screwed onto the left-handed thread provided on the surface of the positioning ring.

[0009] Preferably, a bearing 1 is fixedly connected to the surface of the oil pipeline, a positioning nut is fixedly connected to the side of the bearing 1, the positioning nut can be rotated with the help of the bearing 1, a threaded tube is arranged on the end face of the positioning nut, and a right-handed thread is opened on the outer surface of the threaded tube.

[0010] Preferably, the surface of the positioning ring is fixedly connected with bearing 2, and a limiting nut is provided on the side of bearing 2. The limiting nut can be screwed on the right-hand thread opened on the surface of the threaded tube, and the limiting nut can be rotated with the help of bearing 2.

[0011] Preferably, the sealing rubber pad is glued to the end face of the petroleum pipeline, and the sealing rubber pad can be squeezed into the sealing groove.

[0012] Preferably, a baffle is provided on the inner side of the positioning nut, and the baffle is an annular plate structure. One end of the extrusion spring is fixedly connected to the surface of the baffle, and the other end of the extrusion spring is fixedly connected to the surface of the sealing gasket.

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

[0014] The oilfield pipeline safety valve with a sealing component proposed by the utility model can firstly be screwed on the positioning ring by using the positioning nut so that the sealing rubber pad arranged on the end face of the oil pipeline can be squeezed into the sealing groove so that the oil pipeline and the connecting pipe on the side of the safety valve body can be sealed and connected. When the positioning nut is rotated, the sealing pad can cooperate with the squeezing spring to squeeze the connecting pipe and the oil pipeline to seal the connection. The squeezing spring can make the sealing pad always in an extruded state. The sealing pad cooperates with the sealing rubber pad to improve the sealing effect of the connecting pipe and the oil pipeline and extend the service life. In this way, it is avoided that the traditional safety valve body and the oil pipeline are mainly connected by threaded connection and the sealing rubber pad, and the sealing rubber pad is used to improve the connection sealing performance of the safety valve and the oil pipeline, but the rubber elasticity of the sealing rubber pad will be reduced when the sealing rubber pad is used for a long time, so that it may leak suddenly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a schematic diagram of the structure of the positioning nut of the utility model;

[0017] Figure 3 It is a partial cross-sectional view of the structure of the utility model;

[0018] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0019] Figure 5 This is a cross-sectional view of a petroleum pipeline structure of the utility model;

[0020] Figure 6 for Figure 5 Enlarged structural diagram at B in the middle.

[0021] In the figure: 1. Safety valve body; 2. Connecting pipe; 3. Sealing groove; 4. Positioning ring; 5. Oil pipeline;

[0022] 6. Sealing rubber pad; 7. Positioning nut; 8. Extrusion spring; 9. Sealing pad; 10. Bearing 1; 11. Threaded pipe; 12. Bearing 2; 13. Limiting nut; 14. Baffle. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] See also Figure 1-Figure 6 The utility model provides a technical solution: an oilfield pipeline safety valve with a sealing assembly, the safety valve comprising: a safety valve body 1, a connecting pipe 2 is arranged on the side of the safety valve body 1, a sealing groove 3 is opened on the end face of the connecting pipe 2, and a positioning ring 4 is sleeved on the surface of the connecting pipe 2; an oil pipeline 5, a sealing rubber pad 6 is arranged on the end face of the oil pipeline 5, a positioning nut 7 is sleeved on the surface of the oil pipeline 5, and an extrusion spring 8 and a sealing pad 9 are arranged in the positioning nut 7;

[0026] First, the positioning nut 7 can be screwed onto the positioning ring 4 so that the sealing rubber pad 6 set on the end face of the oil pipeline 5 can be squeezed into the sealing groove 3 to seal the oil pipeline 5 and the connecting pipe 2 on the side of the safety valve body 1. When the positioning nut 7 is rotated, the sealing pad 9 can cooperate with the extrusion spring 8 to squeeze the connecting pipe 2 and the oil pipeline 5 to seal the connection. The setting of the extrusion spring 8 can keep the sealing pad 9 in an extruded state all the time. The sealing pad 9 cooperates with the sealing rubber pad 6 to improve the sealing effect of the connecting pipe 2 and the oil pipeline 5 and extend the service life.

[0027] Embodiment 2

[0028] On the basis of the first embodiment, in order to facilitate the sealing of the connecting pipe 2 and the oil pipeline 5, a positioning nut 7 is provided, the positioning ring 4 is fixedly connected to the surface of the connecting pipe 2, the surface of the positioning ring 4 is provided with a left-handed thread, the positioning nut 7 can be screwed on the left-handed thread provided on the surface of the positioning ring 4, the surface of the oil pipeline 5 is fixedly connected with a bearing 10, the positioning nut 7 is fixedly connected to the side of the bearing 10, the positioning nut 7 can be rotated with the help of the bearing 10, the end face of the positioning nut 7 is provided with a threaded tube 11, the outer surface of the threaded tube 11 is provided with a right-handed thread, the sealing rubber pad 6 is glued to the end face of the oil pipeline 5, and the sealing rubber pad 6 can be squeezed into the sealing groove 3;

[0029] When in use, firstly, the positioning nut 7 can be rotated in cooperation with the bearing 10, so that the positioning nut 7 can be screwed on the positioning ring 4, so that the sealing rubber pad 6 set on the end face of the oil pipeline 5 can be squeezed into the sealing groove 3 for sealing, and then the sealing pad 9 set in the positioning nut 7 can be used to seal the connection between the connecting pipe 2 and the oil pipeline 5, so that the connection sealing performance between the oil pipeline 5 and the connecting pipe 2 can be improved more conveniently.

[0030] Embodiment 3

[0031] On the basis of the second embodiment, in order to improve the stability of the positioning nut 7 after connection, a limited position nut 13 is provided, a bearing 2 12 is fixedly connected to the surface of the positioning ring 4, a limited position nut 13 is provided on the side of the bearing 2 12, the limited position nut 13 can be screwed on the right-hand thread opened on the surface of the threaded tube 11, and the limited position nut 13 can be rotated with the help of the bearing 2 12, a baffle 14 is provided on the inner side of the positioning nut 7, and the baffle 14 is an annular plate structure, one end of the extrusion spring 8 is fixedly connected to the surface of the baffle 14, and the other end of the extrusion spring 8 is fixedly connected to the surface of the sealing gasket 9;

[0032] When in use, when the positioning nut 7 is screwed on the positioning ring 4, the rotatable limit nut 13 can make the limit nut 13 screwed on the threaded tube 11. Because the surface of the positioning ring 4 is opened as a left-handed thread, and the surface of the threaded tube 11 is opened as a right-handed thread, when the limit nut 13 is screwed on the threaded tube 11, the problem of sliding of the positioning nut 7 can be avoided. The setting of the extrusion spring 8 can keep the sealing gasket 9 in an extrusion state at all times to improve the extrusion sealing effect of the sealing gasket 9.

[0033] In actual use, firstly, the positioning nut 7 can be screwed onto the positioning ring 4 so that the sealing rubber pad 6 arranged on the end face of the oil pipeline 5 can be squeezed into the sealing groove 3 so that the oil pipeline 5 and the connecting pipe 2 on the side of the safety valve body 1 can be sealed and connected. When the positioning nut 7 is rotated, the sealing pad 9 can cooperate with the extrusion spring 8 to squeeze the connecting pipe 2 and the oil pipeline 5 to seal the connection. The setting of the extrusion spring 8 can make the sealing pad 9 always in an extruded state. The sealing pad 9 cooperates with the sealing rubber pad 6 to improve the sealing effect of the connecting pipe 2 and the oil pipeline 5 and extend the service life. This avoids the problem that the traditional safety valve body 1 and the oil pipeline 5 are mainly connected by threaded connection with the sealing rubber pad 6, and the sealing rubber pad 6 is used to improve the connection sealing of the safety valve body 1 and the oil pipeline 5, but the rubber elasticity of the sealing rubber pad 6 will be reduced when it is used for a long time, which may cause sudden leakage.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oilfield pipeline safety valve with a sealing assembly, characterized in that: The safety valve comprises: a safety valve body (1), a connecting pipe (2) is arranged on the side of the safety valve body (1), a sealing groove (3) is opened on the end surface of the connecting pipe (2), and a positioning ring (4) is sleeved on the surface of the connecting pipe (2); A petroleum pipeline (5) is provided with a sealing rubber pad (6) on the end surface of the petroleum pipeline (5), a positioning nut (7) is sleeved on the surface of the petroleum pipeline (5), and a pressing spring (8) and a sealing pad (9) are provided inside the positioning nut (7).

2. The oilfield pipeline safety valve with a sealing assembly according to claim 1, characterized in that: The positioning ring (4) is fixedly connected to the surface of the connecting pipe (2), and a left-handed thread is provided on the surface of the positioning ring (4). The positioning nut (7) can be screwed onto the left-handed thread provided on the surface of the positioning ring (4).

3. The oilfield pipeline safety valve with a sealing assembly according to claim 1, characterized in that: A bearing (10) is fixedly connected to the surface of the oil pipeline (5), a positioning nut (7) is fixedly connected to the side of the bearing (10), the positioning nut (7) can be rotated with the help of the bearing (10), a threaded tube (11) is arranged on the end surface of the positioning nut (7), and a right-hand thread is arranged on the outer surface of the threaded tube (11).

4. The oilfield pipeline safety valve with a sealing assembly according to claim 1, characterized in that: The surface of the positioning ring (4) is fixedly connected with a second bearing (12), and a limiting nut (13) is arranged on the side of the second bearing (12). The limiting nut (13) can be screwed onto a right-handed thread provided on the surface of the threaded tube (11), and the limiting nut (13) can be rotated with the help of the second bearing (12).

5. The oilfield pipeline safety valve with a sealing assembly according to claim 1, characterized in that: The sealing rubber pad (6) is glued to the end surface of the petroleum pipeline (5), and the sealing rubber pad (6) can be squeezed into the sealing groove (3).

6. The oilfield pipeline safety valve with a sealing assembly according to claim 1, characterized in that: A baffle (14) is provided on the inner side of the positioning nut (7), and the baffle (14) is an annular plate structure. One end of the extrusion spring (8) is fixedly connected to the surface of the baffle (14), and the other end of the extrusion spring (8) is fixedly connected to the surface of the sealing gasket (9).

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