Pipeline butt joint sealing structure

Abstract

The utility model provides a pipeline butt joint sealing structure, which is characterized in that a movable part and a fixed part which are in sealed connection are respectively provided with a movable interface and a fixed interface which are in butt joint, and the end part of the movable interface is connected with a circle of flexible sealing gasket; the outer side of the movable connector is provided with a pressing piece used for applying pressing force towards the axis direction of the movable connector to the flexible sealing gasket. Wherein in the state that the fixing connector is arranged in the flexible sealing gasket in a penetrating mode, the pressing piece applies circumferential inward pressing force to the flexible sealing gasket so that the outer side face of the fixing connector can be attached to the inner side face of the flexible sealing gasket in a sealed mode. According to the utility model, a good sealing effect can be achieved at the joint of the pipeline butt joint.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a pipeline butt sealing structure. Background Art

[0002] There are a large number of mobile dust hoods in steel workshops that run with process production equipment. The movement of the dust hoods will inevitably cause interface docking problems between the moving part and the fixed part. Except for a few special processes where the dust removal interfaces are used to inhale cold air for mixing and are not sealed, in principle, the interfaces of most dust hoods need to be sealed to avoid the inhalation of cold air and maximize the capture of smoke and dust. It is even more difficult to achieve a good seal for interfaces that are docked in parallel motion. Utility Model Content

[0003] The utility model aims to provide a pipeline butt sealing structure, which can achieve good sealing effect at the butt interface of the pipelines.

[0004] The utility model provides a pipeline butt sealing structure, wherein a movable part and a fixed part in a sealing connection respectively have a movable interface and a fixed interface which are connected to each other, a circle of flexible sealing pads are connected to the end of the movable interface, and a pressing part for applying a pressing force toward the axis direction of the movable interface to the flexible sealing pad is provided on the outer side of the movable interface;

[0005] Wherein, when the fixed interface is inserted into the flexible sealing gasket, the pressing member applies a circumferential inward pressing force to the flexible sealing gasket to make the outer side surface of the fixed interface seal with the inner side surface of the flexible sealing gasket.

[0006] The pipeline butt-jointed sealing structure of the utility model can eliminate unnecessary air leakage and realize good sealing of butt-jointed pipelines.

[0007] The pipeline butt sealing structure of the utility model can realize the sealed butt connection between the moving part and the fixed part only by a flexible sealing pad and a matching pressing part, and has low cost and strong practicality.

[0008] The pipeline butt sealing structure disclosed by the utility model has a relatively simple installation and operation process, a low failure rate, and is relatively convenient for maintenance.

[0009] In a preferred embodiment of the present invention, the flexible sealing gasket is arranged on the outside of the movable interface and extends out of the movable interface by a preset length along the axial direction of the movable interface. When the fixed interface and the movable interface are connected to each other, the flexible sealing gasket is arranged on the circumferential outside of the connection between the two.

[0010] In this embodiment, after the fixed interface and the movable interface are connected to each other, the flexible sealing pad sleeved on the outside of the movable interface can cover the outside of the connecting gap, thereby achieving a good sealing effect.

[0011] In a preferred embodiment of the present invention, the inner side surface of the flexible sealing pad is sealed and bonded to the outer side surface of the movable interface.

[0012] In this embodiment, a bonding method is provided to achieve a sealed connection between the flexible sealing pad and the movable interface; of course, in other embodiments, the two may also be sealed connected by other connection methods such as snap-fitting.

[0013] In a preferred embodiment of the present invention, the clamping member includes an L-shaped pressing piece and a wedge block, a limit frame is provided on the outer side of the movable interface, one end of the L-shaped pressing piece is connected to the outer side of the movable interface, and the other end thereof passes through the limit frame and is located on the circumferential outside of the flexible sealing pad, and the wedge block is arranged between the L-shaped pressing piece and the top wall of the limit frame, and when the wedge block is moved in the limit frame, the L-shaped pressing piece can move toward or away from the flexible sealing pad.

[0014] In this embodiment, a specific structure of a clamping member is provided, in which a wedge block is clamped between an L-shaped pressing plate and a limit frame. Moving the wedge block can press the L-shaped pressing plate downward toward a fixed interface, thereby increasing the sealing strength between the flexible sealing pad and the fixed interface.

[0015] In a preferred embodiment of the present invention, the clamping member includes an L-shaped pressure plate and a clamping bolt, a limit frame is provided on the outer side of the movable interface, one end of the L-shaped pressure plate is connected to the outer side of the movable interface, and the other end thereof passes through the limit frame and is located on the circumferential outside of the flexible sealing pad, the clamping bolt is threadedly connected to the top of the limit frame and its free end abuts against the L-shaped pressure plate, and when the clamping bolt is rotated, the L-shaped pressure plate can move toward or away from the flexible sealing pad.

[0016] In this embodiment, another specific structure of a clamping piece is provided, which includes an L-shaped clamping plate and a clamping bolt. By rotating the clamping stud, the free end of the clamping stud can move toward the L-shaped clamping plate and then press the L-shaped clamping plate downward to press it toward the fixed interface, thereby improving the sealing strength between the flexible sealing pad and the fixed interface.

[0017] In a preferred embodiment of the present invention, a plurality of the pressing members are spaced apart on the outer side surface of the movable interface along the circumferential direction thereof.

[0018] In this embodiment, a plurality of pressing members capable of applying pressure to the flexible sealing pad are provided on the circumferential outer side of the flexible sealing pad, thereby improving the sealing strength between the flexible sealing pad and the fixed interface in the circumferential direction.

[0019] In a preferred embodiment of the present invention, a circle of angle steel is connected to the outer side surface of the flexible sealing pad, and when the L-shaped pressing plate moves toward the flexible sealing pad, the top of the angle steel abuts against the L-shaped pressing plate.

[0020] In this embodiment, the setting of the angle steel can prevent the L-shaped pressure plate from directly acting on the flexible sealing gasket, so that the downward pressure of the L-shaped pressure plate acts on a larger range of the flexible sealing gasket through the angle steel, thereby improving the sealing strength between the flexible sealing gasket and the fixed interface.

[0021] In a preferred embodiment of the present invention, a circle of sealing flange is connected to the outer side surface of the fixed interface, and when the fixed interface is inserted into the flexible sealing gasket, the end of the flexible sealing gasket abuts against the sealing flange.

[0022] In this embodiment, the sealing flange can compensate for the error and misalignment between the moving interface of the moving part and the fixed interface of the fixed part, thereby playing a sealing role.

[0023] In a preferred embodiment of the present invention, the movable interface and the fixed interface are both annular structures and have the same diameter.

[0024] In this embodiment, the movable interface and the fixed interface are arranged in an annular structure without a large angle change in the circumferential direction, so the sealing connection effect is relatively good.

[0025] In a preferred embodiment of the present invention, the flexible sealing pad is an annular sealing ring made of rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0028] Figure 1 This is a schematic diagram of the connection structure of the pipeline butt sealing structure of the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure of part A in the middle.

[0030] Description of reference numerals:

[0031] 10. Fixing parts; 11. Fixing interface; 12. Sealing flange;

[0032] 20. Moving parts; 21. Moving interface;

[0033] 30. Flexible sealing gasket; 31. Angle steel;

[0034] 40. Clamping piece; 41. L-shaped pressing piece; 42. Wedge block; 43. Limiting frame. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] The utility model provides a pipeline butt sealing structure, such as Figure 1 and Figure 2 As shown, the sealed connected moving part 20 and fixed part 10 respectively have a moving interface 21 and a fixed interface 11 connected to each other, a circle of flexible sealing gasket 30 is connected to the end of the moving interface 21, and a clamping member 40 is provided on the outer side of the moving interface 21 for applying a clamping force to the flexible sealing gasket 30 in the axial direction of the moving interface 21; wherein, when the fixed interface 11 is inserted into the flexible sealing gasket 30, the clamping member 40 applies a circumferential inward clamping force to the flexible sealing gasket 30 so that the outer side surface of the fixed interface 11 is sealed and fitted with the inner side surface of the flexible sealing gasket 30.

[0039] The pipeline butt-jointed sealing structure of the utility model can eliminate unnecessary air leakage between the moving part 20 and the fixed part 10, thereby achieving good sealing of the butt-jointed pipelines.

[0040] The pipeline butt sealing structure of the present invention can achieve the sealed butt connection between the moving part 20 and the fixed part 10 only through a flexible sealing pad 30 and a matching pressing part 40, which has low cost and strong practicality.

[0041] The pipeline butt sealing structure disclosed by the utility model has a relatively simple installation and operation process, a low failure rate, and is relatively convenient for maintenance.

[0042] The specific structure, connection method, installation process, working principle and other aspects of the pipeline butt sealing structure of the utility model will be described in detail below.

[0043] like Figure 1 As shown, the pipe docking sealing structure is used between a fixed part 10 and a movable part 20 in a steel workshop which need to be frequently disconnected and connected, wherein the fixed part 10 can be a dust removal flue fixed in the workshop, one end of which leads to the outside of the workshop, and the other end is fixedly arranged at a predetermined position of the operating equipment for connection with a movable dust removal hood, and the movable part 20 can be a movable dust removal hood in the steel workshop.

[0044] Of course, the pipe docking sealing structure described in the utility model is not limited to being set in a steel workshop, it can also be used to connect dust removal pipes in other workshops that require dust removal operations; it is also not limited to being set between the movable part 20 and the fixed part 10. In the actual operation process, fixed and movable are always relative, so it can also achieve a sealed connection between two fixed parts 10 or a sealed connection between two movable parts 20.

[0045] exist Figure 1 In the embodiment shown, the fixed part 10 is a dust removal pipe arranged in the steel workshop, and the movable part 20 is a small connecting pipe arranged outside the dust cover. When dust removal operation is required, the movable part 20 can move with the dust cover until it is axially opposite to the fixed part 10, so that the smoke collected in the dust cover can smoothly pass through the movable part 20 into the fixed part 10, and the smoke is discharged to the outside of the steel workshop through the dust removal pipe.

[0046] The fixed part 10 and the movable part 20 are respectively provided with a fixed interface 11 and a movable interface 21 at the docking position, and the fixed interface 11 and the movable interface 21 have the same size; in this embodiment, the movable interface 21 and the fixed interface 11 are annular structures with the same diameter, and the two are axially docked together. The movable interface 21 and the fixed interface 11 are arranged in an annular structure, and there is no large angle mutation in the circumferential direction, so the sealing connection effect is relatively good.

[0047] Of course, in other embodiments of the present invention, the movable interface 21 and the fixed interface 11 may also be configured as rectangular interfaces of the same size or interfaces of other shapes, as long as the two can be of the same size and can be axially docked together.

[0048] The end of the mobile interface 21 is connected to a circle of flexible sealing pad 30. In this embodiment, the flexible sealing pad 30 is an annular sealing ring made of rubber and adapted to the shape of the mobile interface 21. In other embodiments of the utility model, the flexible sealing pad 30 can also be set at the end of the fixed interface 11. Of course, if the mobile interface 21 and the fixed interface 11 are set to other shapes, the flexible sealing pad 30 is also set to a shape adapted thereto.

[0049] The flexible sealing pad 30 is usually made of a material with a certain elasticity. In this embodiment, it is made of rubber.

[0050] like Figure 1As shown, the flexible sealing pad 30 is sleeved on the outside of the mobile interface 21 and extends out of the mobile interface 21 by a preset length in the axial direction of the mobile interface 21. When the fixed interface 11 and the mobile interface 21 are in contact with each other, the flexible sealing pad 30 is sleeved on the circumferential outside of the contact between the two. After the fixed interface 11 and the mobile interface 21 are in contact with each other, the flexible sealing pad 30 can be wrapped on the outside of the contact gap between the two, thereby achieving a good sealing effect.

[0051] Of course, in other embodiments of the present invention, the flexible sealing pad 30 can also be set on the inner side surface of the mobile interface 21 and extend out of the mobile interface 21 by a preset length along the axial direction of the mobile interface 21. When the fixed interface 11 and the mobile interface 21 are relatively connected, one end of the flexible sealing pad 30 is attached to the inner side surface of the mobile interface 21, and the other end is sleeved on the outer side surface of the fixed interface 11.

[0052] In this embodiment, the preset length of the flexible sealing pad 30 sleeved on the outside of the mobile interface 21 can be selected according to actual needs. The longer the preset length, the better the sealing effect between the flexible sealing pad 30 and the fixed interface 11, but it also makes the process of sleeve the flexible sealing pad 30 on the fixed interface 11 relatively difficult. The diameter of the flexible sealing pad 30 is slightly smaller than the diameter of the mobile interface 21 and the diameter of the fixed interface 11; when the flexible sealing pad 30 is sleeved on the mobile interface 21 in advance, due to the difference in diameter, the flexible sealing pad 30 can produce a certain tensile deformation (be stretched), and the flexible sealing pad 30 can stably cover the outer surface of the mobile interface 21 and can produce a certain pressing force on it, thereby improving the sealing strength between the flexible sealing pad 30 and the mobile interface 21. On the other hand, when the fixed interface 11 is docked with the mobile interface 21, the flexible sealing pad 30 can also be stretched by the fixed interface 11, thereby improving the sealing strength between the flexible sealing pad 30 and the fixed interface 11.

[0053] It should be noted that the diameter of the flexible sealing pad 30 cannot differ greatly from the diameter of the mobile interface 21 , otherwise the flexible sealing pad 30 will be in a highly stretched state for a long time, thereby reducing the service life of the flexible sealing pad 30 .

[0054] Furthermore, in order to enhance the sealing strength between the flexible sealing pad 30 and the fixed interface 11 and the movable interface 21 , on one hand, glue is applied between the inner side surface of the flexible sealing pad 30 and the outer side surface of the movable interface 21 for bonding and fixing.

[0055] In this embodiment, a bonding method is provided to achieve a sealed connection between the flexible sealing pad 30 and the mobile interface 21; in other embodiments, the two can also be further sealed by other connection methods such as snap connection.

[0056] On the other hand, a pressing member 40 is provided on the outer side of the mobile interface 21 for applying pressure to the flexible sealing pad 30 so as to press it toward the fixed interface 11; the pressing member 40 may be an elastic steel sheet, one end of which is connected to the outer side of the mobile interface 21, and the other end of which is pressed against the outer side of the flexible sealing pad 30, thereby providing an inward pressing force for the flexible sealing pad 30. The elastic steel sheet is only for schematic illustration, and the structure of the pressing member 40 is not limited thereto, as long as it can provide inward pressure to the flexible sealing pad 30.

[0057] Of course, if the flexible sealing pad 30 is pre-fixed on the fixing interface 11 , the pressing member 40 is also disposed on the outside of the fixing interface 11 accordingly.

[0058] The structure and technical effects of a preferred implementation of the pipeline butt sealing structure of the utility model will be further described below.

[0059] According to one embodiment of the present utility model, Figure 1 and Figure 2 As shown, the clamping member 40 includes an L-shaped pressing piece 41 and a wedge block 42. A limit frame 43 is provided on the outer side of the movable interface 21. One end of the L-shaped pressing piece 41 is connected to the outer side of the movable interface 21, and the other end thereof passes through the limit frame 43 and is located on the circumferential outer side of the flexible sealing pad 30. The wedge block 42 is arranged between the L-shaped pressing piece 41 and the top wall of the limit frame 43. When the wedge block 42 is moved in the limit frame 43, the L-shaped pressing piece 41 can move toward or away from the flexible sealing pad 30.

[0060] In this embodiment, a specific structure of a clamping member 40 is disclosed, wherein the L-shaped pressing piece 41 is made of a steel sheet with a certain elasticity, the limiting frame 43 is a "door" shaped frame made of a steel sheet, the bottom of the limiting frame 43 is welded to the outer surface of the moving interface 21, one end of the L-shaped pressing piece 41 is welded to the outer surface of the moving interface 21, and the other end passes through the limiting frame 43 and is located on the circumferential outer side of the flexible sealing pad 30, and the wedge block 42 is clamped between the L-shaped pressing piece 41 and the top crossbeam of the limiting frame 43. Figure 2 As shown, moving the wedge block 42 to the left can press the L-shaped pressure piece 41 downward to make it bend toward the flexible sealing pad 30. The L-shaped pressure piece acts on the flexible sealing pad 30 and generates a circumferential inward pressing force thereon, thereby improving the sealing strength between the flexible sealing pad 30 and the fixed interface 11. When the wedge block 42 is moved to the right, the L-shaped pressure piece 41 can move away from the flexible sealing pad 30 under the action of its own elastic restoring force, thereby releasing the pressure applied to the flexible sealing pad 30, making it convenient to release the connection between the fixed part 10 and the movable part 20.

[0061] According to one embodiment of the utility model, the clamping member 40 includes an L-shaped pressing piece 41 and a clamping bolt. A limit frame 43 is provided on the outer side of the mobile interface 21. One end of the L-shaped pressing piece 41 is connected to the outer side of the mobile interface 21, and the other end thereof passes through the limit frame 43 and is located on the circumferential outside of the flexible sealing pad 30. The clamping bolt is threadedly connected to the top of the limit frame 43 and its free end abuts against the L-shaped pressing piece 41. When the clamping bolt is rotated, the L-shaped pressing piece 41 can move toward or away from the flexible sealing pad 30.

[0062] In the present embodiment, another specific structure of the clamping member 40 is disclosed, wherein the L-shaped pressing piece 41 is made of a steel sheet with a certain elasticity, the limiting frame 43 is a "door" shaped frame made of a steel sheet, the bottom of the limiting frame 43 is welded to the outer surface of the mobile interface 21, one end of the L-shaped pressing piece 41 is welded to the outer surface of the mobile interface 21, and the other end passes through the limiting frame 43 and is located on the circumferential outside of the flexible sealing pad 30; a threaded hole is opened on the top cross beam of the limiting frame 43, and the clamping stud is threadedly connected in the threaded hole and its free end rests on the L-shaped pressing piece 41. By rotating the clamping stud in the same direction, its free end can move toward the L-shaped pressing plate 41 and then press the L-shaped pressing plate 41 downward so that it is pressed against the flexible sealing gasket 30, thereby improving the sealing strength between the flexible sealing gasket 30 and the fixed interface 11; by rotating the clamping bolt in the opposite direction, its free end can move away from the L-shaped pressing plate 41 and then release the downward pressure on the L-shaped pressing plate 41. The L-shaped pressing plate 41 can move away from the flexible sealing gasket 30 under the action of its own elastic restoring force, thereby releasing the pressure applied to the flexible sealing gasket 30, making it convenient to release the connection between the fixed part 10 and the movable part 20.

[0063] According to one embodiment of the present utility model, Figure 1 and Figure 2 As shown, along the circumferential direction of the movable interface 21, a plurality of pressing members 40 are arranged at intervals on the outer surface thereof. The arrangement of the plurality of pressing members 40 can improve the sealing strength between the flexible sealing pad 30 and the fixed interface 11 in the circumferential direction.

[0064] According to one embodiment of the present utility model, Figure 1 and Figure 2 As shown, a circle of angle steel 31 is connected to the outer surface of the flexible sealing pad 30, and when the L-shaped pressing piece 41 moves toward the flexible sealing pad 30, the top of the angle steel 31 abuts against the L-shaped pressing piece 41. The provision of the angle steel 31 can prevent the L-shaped pressing piece 41 from directly acting on the flexible sealing pad 30, so that the downward pressure of the L-shaped pressing piece 41 acts on a wider range of the flexible sealing pad 30 through the angle steel 31, thereby improving the sealing strength between the flexible sealing pad 30 and the fixed interface 11.

[0065] According to one embodiment of the present utility model, Figure 1As shown, a sealing flange 12 is connected to the outer surface of the fixed interface 11, and when the fixed interface 11 is inserted into the flexible sealing pad 30, the end of the flexible sealing pad 30 abuts against the sealing flange 12. The sealing flange 12 can compensate for the error between the moving interface 21 of the moving part 20 and the fixed interface 11 of the fixed part 10, and play a sealing role.

[0066] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A pipeline butt sealing structure, It is characterized in that The movable part and the fixed part of the sealing connection respectively have a movable interface and a fixed interface connected to each other, the end of the movable interface is connected with a circle of flexible sealing gasket, and the outer side of the movable interface is provided with a clamping member for applying a clamping force to the flexible sealing gasket in the axial direction of the movable interface; Wherein, when the fixed interface is inserted into the flexible sealing gasket, the pressing member applies a circumferential inward pressing force to the flexible sealing gasket to make the outer side surface of the fixed interface seal with the inner side surface of the flexible sealing gasket.

2. The pipeline butt sealing structure according to claim 1, It is characterized in that The flexible sealing pad is sleeved on the outside of the movable interface and extends out of the movable interface by a preset length along the axial direction of the movable interface. When the fixed interface and the movable interface are in contact with each other, the flexible sealing pad is sleeved on the circumferential outside of the joint between the two.

3. The pipeline butt sealing structure according to claim 2, It is characterized in that The inner side surface of the flexible sealing pad is sealed and bonded to the outer side surface of the moving interface.

4. The pipeline butt sealing structure according to claim 1, It is characterized in that The clamping piece includes an L-shaped pressing piece and a wedge-shaped block. A limit frame is provided on the outer side of the movable interface. One end of the L-shaped pressing piece is connected to the outer side of the movable interface, and the other end thereof passes through the limit frame and is located on the circumferential outside of the flexible sealing pad. The wedge-shaped block is arranged between the L-shaped pressing piece and the top wall of the limit frame. When the wedge block is moved in the limit frame, the L-shaped pressing piece can move toward or away from the flexible sealing pad.

5. The pipeline butt sealing structure according to claim 1, It is characterized in that The clamping part includes an L-shaped pressure piece and a clamping bolt. A limit frame is provided on the outer side of the movable interface. One end of the L-shaped pressure piece is connected to the outer side of the movable interface, and the other end thereof passes through the limit frame and is located on the circumferential outside of the flexible sealing pad. The clamping bolt is threadedly connected to the top of the limit frame and its free end abuts against the L-shaped pressure piece. When the clamping bolt is rotated, the L-shaped pressure piece can move toward or away from the flexible sealing pad.

6. The pipeline butt sealing structure according to any one of claims 1, 4 or 5, It is characterized in that Along the circumferential direction of the moving interface, a plurality of the pressing members are arranged at intervals on the outer surface thereof.

7. The pipeline butt sealing structure according to claim 4 or 5, It is characterized in that A circle of angle steel is connected to the outer side surface of the flexible sealing pad, and when the L-shaped pressing piece moves toward the flexible sealing pad, the top of the angle steel abuts against the L-shaped pressing piece.

8. The pipeline butt sealing structure according to claim 1, It is characterized in that A circle of sealing flange is connected to the outer side surface of the fixed interface. When the fixed interface is inserted into the flexible sealing gasket, the end of the flexible sealing gasket abuts against the sealing flange.

9. The pipeline butt sealing structure according to claim 1, It is characterized in that The movable interface and the fixed interface are both annular structures and have the same diameter.

10. The pipeline butt sealing structure according to claim 8, It is characterized in that The flexible sealing pad is an annular sealing ring made of rubber.

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