CN110878682A - Plug device - Google Patents

Abstract

The invention provides a plug device. It includes: the plug seat, the plugging head and the blocking piece plug seat are provided with mounting round holes and pressure relief holes communicated with the mounting round holes; the mounting circular hole comprises a first threaded hole section; the plugging head comprises a plugging part and a tool connecting part; the plugging part is in threaded connection with the first threaded hole section so as to plug the mounting round hole and the pressure relief hole or unseal the pressure relief hole; the blocking piece is fixedly connected to the plug seat, and when the plugging portion unseals the pressure relief hole, the blocking piece abuts against the plugging head. According to the plug device, the mounting circular hole and the pressure relief hole are plugged through the threaded connection between the plugging head and the first threaded hole section, the plugging head is screwed out of the first threaded hole section, the pressure relief hole is communicated with the mounting circular hole for pressure relief, the pressure between the valve and the plugging head is released, the plugging head is blocked by the blocking piece, the plugging head is prevented from flying out to hurt an operator during pressure relief, and the personal safety of the operator is prevented from being threatened.

Description

Plug device

technical field

The invention relates to the technical field of oil and gas exploitation, in particular to a plug device.

Background technique

As a wellhead device, the Christmas tree is mainly used to suspend the tubing string running into the well, seal the annular space of the tubing and casing, and control and regulate the production of the oil well. Plugs are provided at the valve positions where the Christmas tree is not connected to the pipeline to prevent oil and gas leakage.

The existing plug includes a plugging part and a connecting part fixedly connected with the plugging part, and the plugging part is threadedly connected with the unconnected pipeline of the Christmas tree for plugging. The connecting part is used to connect with the operating tool to apply force to install or remove the plug. During the oil production process, the valves on the unconnected pipelines of the Christmas tree are affected by oil and gas corrosion or high pressure, and the oil and gas are easily leaked from the valve, which increases the pressure between the valve and the plug. When the Christmas tree is connected to other equipment or pipelines for operation, in order to ensure safe operation, the pressure between the valve and the plug needs to be released first. In the prior art, the plug is usually loosened to release the pressure between the valve and the plug, that is, the pressure relief is realized by loosening the plug.

However, if the plug is directly loosened, the plug will easily fly out under the action of pressure, which will harm the operator and threaten the personal safety of the operator.

SUMMARY OF THE INVENTION

The invention provides a plug device to solve the technical problem that the existing plug is easy to fly out and hurt the operator when the pressure is released.

The invention provides a plug device, which comprises: a plug seat, a plug head and a resisting member; the plug seat is provided with an installation circular hole and a pressure relief hole communicated with the installation circular hole; the installation circular The hole includes a first threaded hole segment to block the installation circular hole and the pressure relief hole or unseal the pressure relief hole; the blocking member is fixedly connected to the plug seat, and the blocking portion When the pressure relief hole is unsealed, the blocking member pushes against the plugging head of the tool insertion hole.

The plug device as described above, wherein the installation circular hole further includes a light hole section, the diameter of the light hole section is smaller than the diameter of the first threaded hole section, and the pressure relief hole is opened in the on the side wall of the light hole segment; the blocking part for installing the circular hole includes a light cylinder segment matched with the light hole segment and a threaded segment threaded with the first threaded hole segment.

The plug device as described above, wherein the tool connecting portion is a connecting column; or, the tool connecting portion is a groove formed on an end face of the plugging portion.

The plug device as described above, wherein the plug device further comprises a plug for covering the outlet of the pressure relief hole.

In the plug device as described above, there are a plurality of the pressure relief holes, which are arranged at intervals along the circumferential direction of the light hole segment.

The plug device as described above, wherein the installation circular hole further comprises a second threaded hole segment, and the diameter of the second threaded hole segment is larger than the diameter of the first threaded hole segment; the blocking member and the The second threaded hole segment is threadedly connected, and the blocking member is provided with a tool insertion hole exposing the tool connecting portion.

In the plug device as described above, wherein the blocking member is a cover plate, and a tool insertion hole is provided in a region of the cover plate corresponding to the tool connecting portion.

The plug device as described above, wherein the plug seat is provided with a flange at one end away from the blocking member.

In the above plug device, wherein the plug seat is a cylindrical structure, and one end of the cylindrical structure away from the blocking member is provided with an external thread matching the internal thread of the pipe.

In the plug device as described above, wherein the outer circumferential surface of the cylindrical structure is provided with a hexagonal nut-shaped boss.

The plug device of the invention plugs the installation round hole and the pressure relief hole by screwing the plug head to the first threaded hole section, and unscrews the plug head from the first threaded hole section, so that the pressure relief hole and the installation round hole communicate with each other. Relieve the pressure, release the pressure between the valve and the plugging head, and use the blocking piece to block the plugging head to prevent the plugging head from flying out and hurting the operator when the pressure is released, so as to avoid a threat to the personal safety of the operator.

Description of drawings

The above and other objects, features and advantages of embodiments of the present invention will become more readily understood from the following detailed description with reference to the accompanying drawings. In the accompanying drawings, various embodiments of the present invention will be illustrated by way of example and not limitation, wherein:

Fig. 1 is the exploded view of the plug device of the present invention;

Fig. 2 is the structural representation of the plugging state of the plug device of the present invention;

Fig. 3 is the structural schematic diagram of the pressure relief state of the plug device of the present invention;

Fig. 4 is the structural schematic diagram of the blocking state of the plug device of the present invention;

Fig. 5 is the sectional view of the plug seat of the plug device of the present invention;

Fig. 6 is the structural schematic diagram of the plugging head of the plugging device of the present invention;

Fig. 7 is the structural representation of the blocking member of the plug device of the present invention;

FIG. 8 is a cross-sectional view of the stopper of the plug device of the present invention.

Description of reference numbers:

10: plug seat; 11: mounting hole;

111: first threaded hole segment; 112: smooth hole segment;

113: Second threaded hole segment; 12: Pressure relief hole;

13: Force application part; 14: Threaded connection part;

20: plugging head; 21: plugging part;

211: light cylinder segment; 212: thread segment;

22: tool connecting part; 30: resisting part;

31: Connection segment; 32: Operation segment;

33: Tool insertion hole.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

Fig. 1 is the exploded view of the plug device of the present invention; Fig. 2 is the structural representation of the plugging state of the plug device of the present invention; Fig. 3 is the structural schematic diagram of the pressure relief state of the plug device of the present invention; Fig. 4 is the plug device of the present invention Figure 5 is a cross-sectional view of a plug base of a plug device of the present invention; Figure 6 is a schematic structural diagram of a plug head of a plug device of the present invention; Figure 7 is a schematic structural diagram of a stopper of the plug device of the present invention; 8 is a cross-sectional view of the blocking member of the plug device of the present invention.

Referring to FIGS. 1 to 8 , this embodiment provides a plug device, which includes: a plug base 10 , a plug head 20 and a blocking member 30 ; the plug base 10 is provided with a mounting hole 11 and a mounting hole 11 The connected pressure relief hole 12, the installation round hole includes a first threaded hole section 111; the plugging head 20 includes a plugging part 21 and a tool connecting part 22, the plugging part 21 is threadedly connected with the first threaded hole section 111 to block Install the circular hole 11 and the pressure relief hole 12 or unseal the pressure relief hole 12; the blocking member 30 is fixedly connected to the plug base 10, and when the blocking portion 21 unblocks the pressure relief hole 12, the blocking member 30 abuts against the plugging head 20 . One end of the round hole plug base 10 is installed for fixed connection with the pipeline to be blocked. The plug base 10 and the pipeline to be blocked can be connected by a flange. Specifically, one end of the plug base 10 can be provided with a flange, which is fixedly connected with the flange set on the pipeline to be blocked by bolts. In order to ensure the connection To improve the sealing performance, a gasket can also be provided between the flanges. Alternatively, the plug base 10 is threadedly connected with the pipeline to be blocked, specifically, one end of the plug base 10 is provided with an internal thread, and is threadedly connected with the external thread provided on the pipeline to be blocked; or, one end of the plug base 10 is threaded The connection part 14, the threaded connection part 14 is provided with an external thread, which is threadedly connected with the internal thread provided by the pipeline to be blocked. In order to facilitate the threaded connection between the plug base 10 and the pipeline to be blocked, the plug base 10 is further provided with a force applying portion 13, and the force applying portion 13 is used to connect with the operating tool to threadedly connect the threaded connection portion 14 to the pipeline to be blocked. Alternatively, the threaded connection portion 14 is removed from the pipeline to be blocked. Preferably, the force applying portion 13 is a hexagonal nut structure. The embodiment of the present invention does not limit the thread of the threaded connection portion 14, and those skilled in the art can design according to different pipelines to which the plug device is applied.

It should be noted that, in the embodiment of the present invention, the pipeline to be blocked may be a Christmas tree or other pipeline of oil and gas equipment in the process of oil and gas exploitation, or may be a water pipe, a heating pipe, or the like.

The pressure relief hole 12 is arranged on the side wall of the plug seat 10 and communicates with the installation circular hole 11 . The outlet of the pressure relief hole 12 can be arranged at the force applying portion 13. Of course, for the convenience of processing, a section of light cylinder is arranged between the force applying portion 13 and the threaded connection portion 14 of the plug seat 10, and the outlet of the pressure relief hole 12 is arranged at Light cylindrical section. The cross-sectional size of the pressure relief hole 12 can be set according to the actual application of the pipeline. For example, on the pipeline of some high-pressure devices, the pressure in the pipeline may be relatively large, and the cross-section of the pressure relief hole 12 can be designed to be larger to speed up the pressure relief. speed. The cross section of the pressure relief hole 12 may be circular, elliptical, polygonal, etc., which is not limited herein. Preferably, the cross section of the pressure relief hole 12 is circular. The pressure relief hole 12 may be a smooth round hole. Preferably, the pressure relief hole 12 is provided with an internal thread at the outlet end, which is used to communicate with other pressure relief pipelines, which can prevent the fluid in the pipeline from being released into the atmospheric environment and cause pollution, and also prevent impurities such as particles from entering the pressure relief hole 12. Cause blockage and affect pressure relief.

The installation circular hole 11 opened in the plug base 10 penetrates through the force applying part 13 and the screw connection part 14 of the plug base 10 . The installation circular hole 11 includes a first threaded hole segment 111 for screwing with the blocking portion 21 of the blocking head 20 . The inlet of the pressure relief hole 12 can be arranged on the first threaded hole section 111, and the plugging portion 21 is threadedly connected to the first threaded hole section 111 to realize the blocking of the installation round hole 11 and the pressure relief hole 12. ; Unscrew the plugging head 20 from the first threaded hole section 111 for a distance, so that the installation circular hole 11 communicates with the pressure relief hole 12 for pressure relief. Alternatively, the pressure relief hole 12 is arranged on the side of the first threaded hole section 111 away from the pipeline to be blocked, and the plugging head 20 is completely unscrewed from the first threaded hole section 111 to connect the installation circular hole 11 with the pressure relief hole 12 , to depressurize.

The tool connecting portion 22 of the plugging head 20 is a connecting column or a connecting groove, etc., and is used for connecting with an operating tool such as a wrench, so as to apply a force to connect the plugging portion 21 with the first threaded hole section 111 threadedly, or, The blocking portion 21 is detached from the first threaded hole section 111 .

In order to ensure that when the plugging portion 21 of the plugging head 20 is unscrewed from the first threaded hole section 111 for pressure relief, the plugging head does not fly out of the installation circular hole 11 , the plug seat 10 is provided at one end away from the pressure relief hole 12 . There is a resisting member 30 to resist the blocking head 20 . The resisting member 30 is provided with a tool insertion hole 33 through which the operating tool is passed through the tool insertion hole 33 to connect with the tool connecting portion 22 of the blocking portion 21 , and the operating blocking portion 21 is screwed or loosened with the first threaded hole segment. Wherein, the size of the tool insertion hole 33 is smaller than the size of the blocking portion 21 , so as to achieve resistance to the blocking portion 21 . The blocking member 30 may be an end cap structure, and the cover is provided at the other end of the plug base 10 ; The blocking member 30 may also be a lever structure. Specifically, a mounting hole is formed at the other end of the plugging head 10 along a direction perpendicular to the axial direction of the mounting hole 11 , and the mounting hole passes through the edge of the mounting hole 11 . ; The mounting holes are two parallel to each other, and the distance between the two mounting holes is smaller than the size of the blocking portion 21 of the blocking head 20 . The gear rods pass through the installation holes, and the two gear rods can resist the blocking head 20 . Of course, three or four gear levers can be provided, and the middle area enclosed by the plurality of gear levers is smaller than the size of the blocking portion 21 , and only needs to be able to resist the blocking head 20 .

In the plug device provided in this embodiment, one end of the plug seat is fixedly connected to the pipeline to be plugged, the installation round hole and the pressure relief hole are plugged by the plugging head and the first threaded hole segment threadedly connected, and the plugging head is threaded. Unscrew it from the first threaded hole section, make the pressure relief hole and the installation round hole communicate with each other for pressure relief, release the pressure between the valve and the plugging head, and use the blocking piece to block the plugging head to prevent the plugging head from flying out when the pressure is released. Injure the operator and avoid threatening the operator's personal safety.

Further, the installation circular hole 11 also includes a light hole section 112, the diameter of the light hole section 112 is smaller than the diameter of the first threaded hole section 111; the pressure relief hole 12 is opened on the side wall of the light hole section 112; the blocking part 21 includes The light cylinder section 211 matched with the light hole section 112 and the threaded section 212 threadedly connected with the first threaded hole section 111 .

The installation round hole 11 is located near one end of the pipeline to be blocked, and the first threaded hole segment 111 is located on the side of the clear hole segment 112 away from the pipeline to be blocked. The diameter of the light hole segment 112 is smaller than the diameter of the first threaded hole segment 111 , and accordingly, the diameter of the light cylinder segment 211 of the blocking part 21 is smaller than the diameter of the threaded segment 212 , which is convenient for installation and reliable sealing.

The inlet of the pressure relief hole 12 is arranged on the light hole section 112 of the installation circular hole 11 , preferably, the pressure relief hole 12 is arranged at one end of the light hole section 112 close to the first threaded hole section 111 . The blocking part 21 includes a light cylinder section 211 and a threaded section 212 , and the light cylinder section 211 cooperates with the light hole section 112 to block the pressure relief hole 12 . The threaded section 212 is threadedly connected with the first threaded hole section 111 . The threads of the thread segment 212 and the first thread hole segment 111 may be triangular threads, rectangular threads, trapezoidal threads, etc., which are not limited in the embodiment of the present invention.

2 , 5 and 6 , the threaded section 212 of the blocking part 21 is threadedly connected with the first threaded hole section 111 , and the light cylinder section 211 of the blocking part 21 is matched with the light hole section 112 to block the installation circular hole 11 and the pressure relief hole 12, and at the same time, the plug seat 10 is fixedly connected with the pipeline to be blocked, so as to realize the blocking of the pipeline;

3, 5 and 6, when it is necessary to disassemble the lower plug device and connect it with other equipment or pipelines, connect the tool connection part 22 of the plugging head 20 by operating the tool, and unscrew the threaded section 212 upward, and the plugging head 20 moves upward along the axial direction of the through hole 11 as a whole, when the light cylinder section 211 moves to the upper end of the pressure relief hole 12, the pressure relief hole 12 is communicated with the light hole section 112, and the pressure fluid between the valve and the plug device passes through the pressure relief The hole flows out for pressure relief. Preferably, when the pressure relief hole 12 is communicated with the light hole section 112 for pressure relief, the threaded section 212 and the first threaded hole section 111 are still partially threaded, which can resist a part of the fluid between the valve and the plug device to the plugging head. 20 pressure.

4 to 6 , when the threaded connection between the threaded section 212 and the first threaded hole section 111 is insufficient to withstand the pressure of the fluid between the valve and the plug device on the plug head 20, the gap between the valve and the plug device The fluid pressure impacting the plugging head 20 continues to move upward along the axial direction of the installation circular hole 11, and the blocking member 30 provided at the end of the plug seat 10 away from the pressure relief hole 12 further blocks the plugging head 20 to prevent the plugging head from flying out of the injury operation. personnel, to protect the personal safety of operators.

It should be noted here that, in the present invention, the orientation words "up" and "top" refer to the end away from the blocked pipeline; the orientation words "down" and "bottom" refer to the end close to the blocked pipeline.

In some embodiments, the tool connecting portion 22 of the occluding head 20 is a connecting post protruding from the top surface of the threaded section 212 . The connecting column can be a multi-square column such as a triangular column, a square column, or a hexagonal column, or other irregular-shaped columns, etc., which are convenient to be connected with operating tools such as a wrench. Optionally, the connecting column has a hexagonal column structure and can be connected with a general hexagonal wrench. The connection post can be located in the installation hole 11, and the operating tool can be inserted into the installation circular hole 11 for operation; the connection post can also be extended to the outside of the installation circular hole 11, which is more simple and convenient to connect with the operating tool and easy to operate.

In other embodiments, the tool connecting portion 22 of the blocking head 20 is a groove formed on the end surface of the blocking portion 21 . Specifically, the tool connecting portion 22 is a connecting groove whose top surface of the threaded section 212 is concave downward. The connecting grooves may be polygonal grooves such as triangular grooves, quadrilateral grooves, hexagonal grooves, etc., or other irregular-shaped grooves. Optionally, the connecting groove is a hexagonal groove, which can be connected with a general Allen wrench.

Optionally, the plug device further includes a blocking member, and the blocking member can cover the outlet end of the pressure relief hole 12 . Specifically, the outlet end of the pressure relief hole 12 is provided with threads, and the blocking member is threadedly connected to the outlet end of the pressure relief hole 12; The blocking member may be a plug body structure, which is accommodated in the pressure relief hole 12; In some construction sites, the environment is relatively harsh, such as oil and gas mining sites, etc., where there is a lot of sand and dust. When pressure relief is not required, the plugging element is connected to the outlet end of the pressure relief hole 12 for blocking to prevent sand and dust, etc. Impurities enter the pressure relief hole 12 to block the pressure relief hole 12 and affect the pressure relief.

Optionally, there is one pressure relief hole 12 , the open end of which is provided in the light hole section 112 , and the outlet end is provided between the force applying portion 13 of the plug seat 10 and the threaded connection portion 14 with a section of light cylindrical portion. The central axis of the pressure relief port 12 may be inclined relative to the central axis of the installation circular hole 11 . Preferably, the central axis of the pressure relief port 12 is perpendicular to the central axis of the installation circular hole 11 .

Optionally, there are multiple pressure relief holes 12 , which are arranged at intervals along the circumferential direction of the light hole section 112 . For example, there may be two or three or more pressure relief holes 12 , which are evenly spaced along the circumference of the light hole section 112 . Alternatively, there are a plurality of pressure relief holes 12, which are arranged at intervals along the axial direction of the optical hole section 112. During the process of gradually unscrewing the threaded section 212 upward, the pressure relief holes 12 communicate with the installation circular holes 11 one by one for pressure relief, reducing the pressure. Risk of plugging head flying out. Alternatively, there are a plurality of pressure relief holes 12, which are arranged at intervals along the helical direction of the light hole end 112. When the threaded section 212 of the plugging portion 21 is gradually screwed upwards out of the first threaded hole section 111, the pressure relief holes 12 are one by one with the installation circle. The hole 11 is connected for pressure relief, reducing the risk of the plugging head flying out.

On the basis of the above embodiment, the blocking member 30 is a cover plate, and a tool insertion hole is provided in the region of the cover plate corresponding to the tool connecting portion 22 . The cover plate cover is provided on the other end of the plug base 10 , and the cover plate can be an end cover structure provided with a flange structure, and is connected with the flange provided at the other end of the plug base 10 by bolts. Alternatively, the cover plate may be an end cap structure provided with threads, sleeved on the other end of the plug seat 10 . The resisting member 30 is provided with a tool insertion hole, and the tool insertion hole can be in triangular, square and other deformable shapes, or in circular, oval, and irregular shapes. Preferably, the tool insertion hole is a circular hole, and the diameter of the tool insertion hole is smaller than the diameter of the threaded section 212 of the blocking part 21 , the diameter of the tool insertion hole is larger than the size of the tool connection part 22 , and the operating tool can pass through the tool insertion hole Connecting with the tool connecting portion 22 for operation, the bottom surface of the resisting member 30 is in contact with the top surface of the threaded section 212 to achieve the resisting effect.

The blocking member 30 may also be in other forms, for example, the blocking member 30 is accommodated in the installation circular hole 11 . Specifically, the installation circular hole 11 further includes a second threaded hole segment 113, the diameter of the second threaded hole segment 113 is larger than the diameter of the first threaded hole segment 111; A tool insertion hole 33 that exposes the tool connection portion is provided.

The upper end of the installation circular hole 11 is provided with an internal thread, which is a second threaded hole segment 113, and the second threaded hole segment 113 is located at one end of the first threaded hole segment 111 away from the pipeline to be blocked; Between the first threaded hole segment 111 there is a section of light hole, the diameter of the light hole is the same as the diameter of the first threaded hole section 111, and the diameter of the second threaded hole section 113 is larger than the diameter of the light hole section to facilitate installation Blocking head 20 . 7 and 8 , the blocking member 30 includes a connecting section 31 and an operating section 32. The connecting section 31 is provided with an external thread and is threadedly connected with the second threaded hole section 113. The operating section 32 is used for connecting with an operating tool for operation. Preferably, the operating section 32 is a hexagonal nut structure, which is convenient to be connected with a universal wrench. The resisting member 30 is provided with a tool insertion hole 33 penetrating the connecting section 31 and the operating section 32 . The tool insertion hole 33 may be triangular, square, etc., or a circle, an ellipse, an irregular shape, or the like. Preferably, the tool insertion hole 33 is a circular hole, and the diameter of the tool insertion hole 33 is larger than the size of the tool connecting portion 22 of the plugging head 20 and smaller than the diameter of the threaded section 212 , so that the bottom surface of the connecting section 31 and the threaded section 212 are in contact with each other. The top surface abuts to prevent the plugging head from flying out and hurting the operator.

Further, the plug seat 10 is a cylindrical structure, and one end of the cylindrical structure away from the blocking member 30 is provided with an external thread matching the internal thread of the pipe. The outer circumferential surface of the cylindrical structure is provided with a hexagonal nut-shaped boss. That is, the force-applying portion 13 of the plug holder 10 is a hexagonal nut boss, which is convenient to connect with an operating tool such as a wrench, and apply a force to install or remove the plug holder 10 . The threaded connection part of the plug seat 10 is an external thread, which matches with the internal thread of the pipe, so as to realize the fixed connection with the pipe.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the above description, descriptions with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean the specific features, structures described in connection with the embodiment or example , material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A plug device, characterized in that, comprising: a plug seat, a plug head and a blocking member; The plug seat is provided with a circular installation hole and a pressure relief hole communicated with the circular installation hole; the circular installation hole includes a first threaded hole segment; The plugging head includes a plugging part and a tool connecting part; the plugging part is threadedly connected with the first threaded hole segment to block the installation circular hole and the pressure relief hole or unblock the leakage hole press hole; The blocking member is fixedly connected to the plug base, and when the blocking portion unblocks the pressure relief hole, the blocking member presses against the blocking head. 2 . The plug device according to claim 1 , wherein the installation circular hole further comprises a light hole segment, the diameter of the light hole segment is smaller than the diameter of the first threaded hole segment, and the pressure relief A hole is opened on the side wall of the light hole segment; The blocking part includes a light cylinder section matched with the light hole section and a threaded section threaded with the first threaded hole section. 3 . The plug device according to claim 2 , wherein the tool connecting portion is a connecting column; or, the tool connecting portion is a groove formed on an end face of the plugging portion. 4 . 4 . The plug device according to claim 2 , wherein the plug device further comprises a blocking member that covers the outlet of the pressure relief hole. 5 . 5 . The plug device according to claim 4 , wherein there are a plurality of the pressure relief holes, which are arranged at intervals along the circumferential direction of the light hole segment. 6 . 6 . The plug device according to claim 1 , wherein the blocking member is a cover plate, and a tool insertion hole is provided in a region of the cover plate corresponding to the tool connecting portion. 7 . 7 . The plug device according to claim 1 , wherein the installation circular hole further comprises a second threaded hole segment, and the diameter of the second threaded hole segment is larger than that of the first thread. 8 . the diameter of the hole segment; The blocking member is threadedly connected with the second threaded hole segment, and the blocking member is provided with a tool insertion hole for exposing the tool connecting portion. 8 . The plug device according to claim 1 , wherein a flange is provided at one end of the plug seat away from the blocking member. 9 . 9. The plug device according to any one of claims 1-5, wherein the plug seat is a cylindrical structure, and one end of the cylindrical structure away from the blocking member is provided with a thread matching the inner thread of the pipe. External thread. 10 . The plug device according to claim 9 , wherein the outer circumferential surface of the cylindrical structure is provided with a hexagonal nut-shaped boss. 11 .

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