A hydraulic disc plugging device for in-service pipelines

Abstract

The present disclosure provides a hydraulic disc-type plugging device for an in-service pipeline. The pipeline wall of the in-service pipeline is provided with an in-service opening mounting hole. The plugging device includes: a main support, the first end of the main support is movably inserted into the in-service pipeline through the in-service opening mounting hole; a push rod hydraulic cylinder assembly, the push rod hydraulic cylinder assembly includes a push rod hydraulic cylinder, the cylinder barrel of the push rod hydraulic cylinder is provided at the first end of the main support, and the piston rod of the push rod hydraulic cylinder is away from the first end of the main support; a plugging head assembly, the plugging head assembly includes a setting hydraulic cylinder, an extrusion mechanism and a sealing assembly; the cylinder body of the setting hydraulic cylinder is provided in the in-service pipeline. The hydraulic disc-type plugging device for an in-service pipeline of the present disclosure realizes hydraulic driving of the plugging head assembly inside the plugging structure through the push rod hydraulic cylinder assembly, and can realize driving of the setting hydraulic cylinder through the mechanical movement of the piston rod of the push rod hydraulic cylinder, thereby realizing driving of the extrusion mechanism and the sealing assembly, thereby realizing blocking or unblocking of the in-service pipeline.

Description

Technical Field

[0001] The present invention relates to a sealing device for extrusion deformation of a sealing ring in an in-service pipe, and in particular to a hydraulic disc-type sealing device for an in-service pipeline, belonging to the technical field of pipeline maintenance and repair. Background Art

[0002] At present, in the construction of opening and sealing of oil and gas pipelines in service in China, traditional mechanical steering disc sealing devices are commonly used. Their sealing system belongs to the single leather cup rubber interference compression deformation sealing technology. If straight welds or spiral welds are encountered in pipelines, there will be micro-leakage of the seal, and the isolation bag needs to be lowered twice to carry out hot work, which poses certain safety hazards. Summary of the Invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art and provides a hydraulic disc plugging device for an in-service pipeline.

[0004] In one aspect of the present disclosure, a hydraulic disc plugging device for an in-service pipeline is provided, wherein a pipeline wall of the in-service pipeline is provided with an in-service opening mounting hole, and the plugging device comprises:

[0005] a main bracket, wherein a first end of the main bracket is movably inserted into the in-service pipeline through the in-service opening mounting hole;

[0006] The plugging head assembly includes a setting hydraulic cylinder, an extrusion mechanism, and a sealing component; the cylinder body of the setting hydraulic cylinder is disposed in the in-service pipeline, the extrusion mechanism is connected to the piston rod of the setting hydraulic cylinder, and the sealing component is disposed outside the cylinder barrel of the setting hydraulic cylinder and abuts against the extrusion mechanism; the piston rod of the setting hydraulic cylinder drives the extrusion mechanism to squeeze or release the sealing component to block or unseal the in-service pipeline;

[0007] The sealing assembly includes a first seal sleeved on the outside of the cylinder barrel of the setting hydraulic cylinder. The outer diameter of the radial extrusion portion of the first seal is larger than the inner diameter of the in-service pipeline, and the first seal is interference-extruded in the in-service pipeline to seal the in-service pipeline; a hard layer is provided on the side of the radial extrusion portion facing away from the extrusion mechanism to limit the deformation direction of the radial extrusion portion after being interference-extruded.

[0008] Optionally, the hard layer adopts a radial structure and is vulcanized and molded using nitrile rubber.

[0009] Optionally, an axial extrusion portion is provided on a side of the radial extrusion portion of the first seal close to the extrusion mechanism, and the rubber inside the pipeline of the axial extrusion portion is smaller than the inner diameter of the pipeline;

[0010] After being squeezed by the squeezing mechanism, the axial squeezing portion is axially compressed and has an increased outer diameter, and the portion with the increased outer diameter enters the peristaltic cavity.

[0011] Optionally, the volume of the peristaltic chamber is greater than the interference between the first seal and the in-service pipeline.

[0012] Optionally, the side surface where the outer diameter of the radial extrusion portion exceeds the outer diameter of the axial extrusion portion is an inclined surface, so that the peristaltic cavity forms a triangular cavity.

[0013] Optionally, the sealing assembly further includes a second sealing member sleeved on the outside of the cylinder barrel of the setting hydraulic cylinder;

[0014] The second sealing member abuts against the extrusion mechanism, and is radially deformed after being squeezed by the extrusion mechanism, and its outer diameter increases to seal the in-service pipeline.

[0015] Optionally, the sealing assembly further comprises a pressure test chamber isolation ring sleeved on the outside of the cylinder barrel of the setting hydraulic cylinder, wherein the pressure test chamber isolation ring abuts against the first sealing member and the second sealing member respectively;

[0016] The outer diameter of the pressure test chamber isolation ring is smaller than the outer diameter of the first seal and the outer diameter of the second seal. After the in-service pipeline is blocked, the pressure test chamber isolation ring, the first seal, the second seal and the in-service pipeline form a closed pressure test ring chamber.

[0017] Optionally, the pressure test ring cavity is connected to a pressure detection device to perform a sealing test by detecting the pressure in the pressure test ring cavity.

[0018] Optionally, the sealing assembly further includes an anti-overturning assembly sleeved on the outside of the cylinder barrel of the setting hydraulic cylinder, and the anti-overturning assembly abuts against the first sealing component to limit the axial displacement of the first sealing component.

[0019] Optionally, the plugging head assembly further includes a steering wheel support, which is connected to an end of the cylinder barrel of the setting hydraulic cylinder away from the extrusion mechanism and is used for mounting a steering wheel.

[0020] A hydraulic disc-type sealing device for an in-service pipeline according to an embodiment of the present disclosure achieves passive interference sealing of the in-service pipeline by providing a first sealing member having a radial extrusion portion and a hard layer. The radial extrusion portion can ensure the interference sealing of the in-service pipeline by the first sealing member, and the hard layer can limit the deformation direction of the radial extrusion portion, thereby ensuring that the first sealing member achieves radial interference sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a hydraulic disc plugging device for an in-service pipeline according to an embodiment of the present disclosure;

[0022] Figure 2 This is a partially enlarged view of a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure;

[0023] Figure 3 This is a schematic structural diagram of a first sealing member of a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure;

[0024] Figure 4 This is a schematic structural diagram of a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure;

[0025] Figure 5 This is a structural schematic diagram of a cleaning brush assembly of a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure;

[0026] Figure 6 This is a schematic structural diagram of a brush bundle assembly of a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure;

[0027] Figure 7 This is a structural schematic diagram of a brush holder of a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure;

[0028] Figure 8 This is a schematic diagram of the brush holder structure of a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure;

[0029] Figure 9 This is a schematic structural diagram of a mounting frame for a hydraulic disc plugging device for an in-service pipeline according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It is apparent that the described embodiments are only a portion of the embodiments of the present disclosure, not all of them. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without the need for creative work are within the scope of protection of the present disclosure.

[0031] Unless otherwise specified, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which this disclosure belongs. The "including" or "comprising" used in this disclosure neither limits the shapes, numbers, steps, actions, operations, components, originals and / or their groups mentioned, nor excludes the appearance or addition of one or more other different shapes, numbers, steps, actions, operations, components, originals and / or their groups, or the addition of these. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number and order of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In some descriptions of the invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," and similar expressions are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect through an intermediate medium, and may be internal connections between two elements or mutual interactions between two elements. In addition, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to indicate relative positional relationships. When the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0033] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should also be understood that when a layer is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. It should also be understood that when an element (such as a layer, region or substrate) is referred to as being "on," "connected to," "electrically connected to," or "electrically coupled to" another element, it can be directly on, directly connected or coupled to the other element, or one or more intervening elements may be present. Conversely, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers present. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.)

[0035] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn in accordance with actual proportional relationships, and that the techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices shown should be considered part of the authorized specification. In all examples shown and discussed herein, any specific other examples may have different values. It should be noted that similar symbols and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0036] Below, we will refer to Figure 1 and Figure 2 A hydraulic disc plugging device for an in-service pipeline according to an embodiment of the present disclosure is described.

[0037] like Figure 1 and Figure 2As shown, this embodiment provides a hydraulic disc plugging device for an in-service pipeline. The in-service pipeline 800 is an oil and gas pipeline in service, that is, a working pipeline that needs to be plugged. The pipeline wall of the in-service pipeline is provided with an in-service opening installation hole, and the plugging device enters the in-service pipeline through the in-service opening installation hole. The sealing device includes a main support 100, a push rod hydraulic cylinder assembly 200 and a sealing head assembly 300. The sealing device also includes a rotating arm 400. The first end of the main support 100 is movably inserted into the in-service pipeline 800 via the in-service opening mounting hole. One end of the rotating arm 400 is rotatably connected to the main support 100 through a rotating shaft, and the other end of the rotating arm 400 is fixedly connected to the sealing head assembly 300. The rotating arm 400 can be driven to rotate around the rotating shaft so that the sealing head assembly 300 can be rotated into the in-service pipeline 800. The rotating shaft is not shown in the figure. It should be noted that those skilled in the art can set the number and position of the rotating shaft according to actual usage requirements, and no specific restrictions are imposed in this embodiment.

[0038] like Figure 1 and Figure 2 As shown, the lower end of the main support 100 is inserted into the in-service pipeline 800 through the in-service opening mounting hole, the left end of the rotating arm 400 is rotatably connected to the main support 100, and the right end of the rotating arm 400 is fixedly connected to the plugging head assembly 300. The vertical displacement of the main support and the posture of the coordinated rotation of the rotating arm act together on the plugging head assembly to move it to the setting position, that is, the plugging position. As shown in the figure, at this time, the rotating arm 400 shown in the figure has been rotated to the setting position, that is, the plugging head assembly 300 is axially facing the in-service pipeline 800, so that the in-service pipeline 800 can be plugged. It should be noted that those skilled in the art can set the driving method of the rotating arm according to actual conditions, such as using hydraulic drive, and this is not specifically limited in this embodiment.

[0039] like Figure 1 and Figure 2 As shown, the push rod hydraulic cylinder assembly 200 includes a push rod hydraulic cylinder 210, the cylinder barrel of the push rod hydraulic cylinder is arranged at the first end of the main support 100, that is, the lower end of the main support in the figure, and the piston rod 211 of the push rod hydraulic cylinder is away from the first end of the main support 100, that is, the lower end of the main support in the figure. It can be seen from the figure that the upper end of the piston rod 211 of the push rod hydraulic cylinder is provided with a piston and is movably inserted into the cylinder barrel of the push rod hydraulic cylinder 210.

[0040] like Figure 1 and Figure 2As shown, the plugging head assembly 300 includes a setting hydraulic cylinder 310, an extrusion mechanism 320 and a sealing component 330; the cylinder body of the setting hydraulic cylinder 310 is arranged in the in-service pipeline 800, and the piston rod 312 of the setting hydraulic cylinder is movably inserted in the cylinder barrel 311 of the setting hydraulic cylinder; the extrusion mechanism 320 is connected to the piston rod 312 of the setting hydraulic cylinder, the outer diameter of the extrusion mechanism is smaller than the inner diameter of the in-service pipeline, and the piston rod of the setting hydraulic cylinder can drive the extrusion mechanism to perform axial reciprocating motion, and the sealing component 330 is arranged on the outside of the cylinder barrel 311 of the setting hydraulic cylinder and abuts against the extrusion mechanism 320, as shown in FIG. Figure 2 As shown, the left side of the piston rod 312 of the setting hydraulic cylinder is fixedly connected to the extrusion mechanism 320, while the right side of the extrusion mechanism abuts the sealing assembly 330. It should be noted that the sealing assembly 330 is an elastic structure. Those skilled in the art may configure the material and structure of the sealing assembly based on actual needs, and this embodiment does not impose any specific restrictions. It should be noted that those skilled in the art may configure the connection method between the extrusion mechanism and the piston rod of the setting hydraulic cylinder based on actual needs, such as using a bolt connection, and this embodiment does not impose any specific restrictions.

[0041] For example, Figure 1 and Figure 2 As shown, an inner hole is provided on the side of the extrusion mechanism 320 facing the setting hydraulic cylinder, that is, on the right side in the figure, and the cylinder barrel 311 of the setting hydraulic cylinder is movably inserted in the inner hole. When the extrusion mechanism is driven to move by the piston rod 312 of the setting hydraulic cylinder, the cylinder barrel of the setting hydraulic cylinder can slide relatively in the inner hole, which is a left and right sliding motion as shown in the figure. Through the setting of the inner hole, the direction of relative movement between the extrusion mechanism and the setting hydraulic cylinder can be limited.

[0042] like Figure 1 and Figure 2 As shown, the first oil port A of the setting hydraulic cylinder 310 is connected to the first oil port A' of the push rod hydraulic cylinder 210, and the second oil port B of the setting hydraulic cylinder 310 is connected to the second oil port B' of the push rod hydraulic cylinder 210, so that the hydraulic oil in the cylinder barrel of the push rod hydraulic cylinder 210 drives the piston rod 312 of the setting hydraulic cylinder to drive the squeezing mechanism 320 to move and squeeze or relax the sealing assembly to seal or unseal the in-service pipeline.

[0043] For example, the first oil port A of the setting hydraulic cylinder 310 can be fluidically connected to the first oil port A' of the push rod hydraulic cylinder 210 through the setting oil circuit 700, and the second oil port B of the setting hydraulic cylinder 310 can be fluidically connected to the second oil port B' of the push rod hydraulic cylinder 210 through the unsealing oil circuit 600. Those skilled in the art can set the connection method according to actual conditions, and no specific restrictions are made in this embodiment.

[0044] For example, Figure 1 and Figure 2 As shown, when the piston rod 211 of the push rod hydraulic cylinder moves upward, the hydraulic oil in the push rod hydraulic cylinder 210 flows out through the first oil port A' and flows into the first oil port A of the setting hydraulic cylinder 310 through the setting oil circuit 700. The hydraulic oil drives the piston rod 312 of the setting hydraulic cylinder to move rightward, thereby driving the extrusion mechanism 320 to move rightward. The extrusion mechanism squeezes the sealing assembly 330 to the right. The sealing assembly 330 is deformed after being squeezed. The deformation is mainly a reduction in the axial dimension and an increase in the radial dimension, thereby blocking the in-service pipeline 800.

[0045] For example, Figure 1 and Figure 2 As shown, when the piston rod 211 of the push rod hydraulic cylinder moves downward, the hydraulic oil in the push rod hydraulic cylinder 210 flows out through the second oil port B' and flows into the second oil port B of the setting hydraulic cylinder 310 through the unsealing oil circuit 600. The hydraulic oil drives the piston rod 312 of the setting hydraulic cylinder to move left, thereby driving the extrusion mechanism 320 to move left. After the extrusion mechanism moves to the left, the extrusion on the sealing component 330 is released, that is, the pressure relief of the sealing component 330 is achieved. Since the sealing component 330 is an elastic structure, its deformation is restored after the extrusion is released, that is, the outer diameter is restored, and then the in-service pipeline 800 is unsealed.

[0046] The disclosed embodiment is a hydraulic disc-type sealing device for an in-service pipeline, which realizes the hydraulic drive of the sealing head assembly inside the sealing structure through the push rod hydraulic cylinder assembly, and can generate hydraulic power in the push rod hydraulic cylinder through the mechanical movement of the piston rod of the push rod hydraulic cylinder, and connect the sealing hydraulic cylinder through the oil pipe to form energy conversion or equal volume hydraulic oil replacement, that is, the hydraulic oil in the push rod hydraulic cylinder is replaced into the sealing hydraulic cylinder, thereby realizing the drive of the sealing hydraulic cylinder, and then realizing the drive of the sealing assembly by the extrusion mechanism, realizing the sealing or unsealing of the in-service pipeline, so that the medium in the in-service pipeline is isolated or circulated. In addition, because the push rod hydraulic cylinder assembly is arranged on the main support, that is, inside the sealing device, the hydraulic drive of the sealing head assembly realizes the hydraulic transmission inside the sealing device structure, thereby avoiding the complex structure of the external hydraulic transmission structure and improving the reliability of the sealing device. Moreover, because the push rod hydraulic cylinder itself has a simple structure, its preparation process is simple, the construction cost is reduced, and the sealing performance is improved.

[0047] The following will be combined Figure 1 and Figure 2 , further elaborating on the specific structure of the push rod hydraulic cylinder assembly.

[0048] like Figure 1 and Figure 2As shown, the push rod hydraulic cylinder assembly 200 also includes a push rod cylinder piston rod adjusting head 220, which is arranged on the side of the piston rod 211 of the push rod hydraulic cylinder away from the main bracket 100, that is, the lower side of the piston rod 211 of the push rod hydraulic cylinder shown in the figure, and the push rod cylinder piston rod adjusting head 220 can relatively adjust the connection length between it and the piston rod 211 of the push rod hydraulic cylinder.

[0049] For example, Figure 1 and Figure 2 As shown, the push rod cylinder piston rod adjusting head 220 is movably mounted on the outside of the piston rod 211 of the push rod hydraulic cylinder. The push rod cylinder piston rod adjusting head 220 is provided with an adjusting through hole. The piston rod 211 of the push rod hydraulic cylinder is provided with an adjusting hole corresponding to the adjusting through hole, so as to adjust the connection length between the two by passing through the fasteners provided in the adjusting through hole and the adjusting hole. The adjusting through hole and the adjusting hole are not shown in the figure. Those skilled in the art can adjust according to the actual setting. No specific restrictions are made in this embodiment.

[0050] For example, Figure 1 and Figure 2 As shown, the adjustment through hole of the push rod cylinder piston rod adjustment head 220 is connected to the adjustment hole of the piston rod 211 of the push rod hydraulic cylinder through a thread, and the connection length between the push rod cylinder piston rod adjustment head 220 and the piston rod 211 of the push rod hydraulic cylinder is adjusted by the amount of screwing in or out of the thread. For example, the fastener can be selected as a locking screw, that is, the push rod cylinder piston rod adjustment head 220 and the piston rod 211 of the push rod hydraulic cylinder are locked and fixed by the locking screw.

[0051] For example, Figure 1 and Figure 2 As shown, the main support 100 is provided with a machined and formed cylinder barrel of the push rod hydraulic cylinder, that is, a cavity is machined and formed on the main support 100 to serve as a hydraulic oil receiving chamber for the push rod hydraulic cylinder, and the piston rod 211 of the push rod hydraulic cylinder can be inserted into the cavity. Exemplarily, the main support 100 can also be provided with a push rod hydraulic cylinder mounting cavity, that is, a cavity is machined and formed on the main support 100. In this case, the mounting cavity is used to insert the independently formed cylinder barrel of the push rod hydraulic cylinder, and the piston rod 211 of the push rod hydraulic cylinder can be inserted into the cylinder barrel of the push rod hydraulic cylinder.

[0052] The embodiment of the present disclosure is a hydraulic disc sealing device for an in-service pipeline. The stroke of the piston rod of the push rod hydraulic cylinder in the push rod hydraulic cylinder is adjusted by adjusting the connection length between the piston rod adjusting head of the push rod cylinder and the piston rod of the push rod hydraulic cylinder, that is, the working stroke of the piston rod of the push rod hydraulic cylinder is adjusted, thereby adjusting the amount of hydraulic oil that can flow out of the first oil port A' and the second oil port B' of the push rod hydraulic cylinder, and then adjusting the amount of hydraulic oil that can flow into the first oil port A and the second oil port B of the setting hydraulic cylinder. By adjusting the amount of hydraulic oil flowing into the setting hydraulic cylinder, the stroke of the piston rod of the setting hydraulic cylinder is controlled, so as to control the driving stroke of the piston rod of the setting hydraulic cylinder on the extrusion mechanism, so that the setting hydraulic cylinder can adjust the extrusion degree of the sealing component according to different sealing requirements, and the controllable adjustment of the sealing degree of the sealing head assembly is achieved by controlling the extrusion deformation amount of the sealing component through the oil replacement principle.

[0053] The following will be combined Figure 1 and Figure 2 , further elaborating on the specific structure of the main bracket support block.

[0054] like Figure 1 and Figure 2 As shown, the sealing device also includes a main bracket support block 500, and a hollow hole is provided on the main bracket support block 500. The push rod cylinder piston rod adjusting head 220 can be movably inserted in the hollow hole, and the connection length between it and the main bracket support block 500 can be relatively adjusted. Since the piston rod 211 of the push rod hydraulic cylinder is connected to the push rod cylinder piston rod adjusting head 220, the stroke of the piston rod 211 of the push rod hydraulic cylinder can be adjusted by adjusting the length of the push rod cylinder piston rod adjusting head 220 inserted into the hollow hole, thereby adjusting the hydraulic oil volume of the push rod hydraulic cylinder.

[0055] For example, Figure 1 and Figure 2As shown, the main support support block 500 is mechanically connected to the main support 100, so that the main support support block 500 and the push rod cylinder piston rod adjustment head 200 inserted therein jointly seal the end of the push rod hydraulic cylinder barrel facing away from the main support, that is, the lower end of the push rod hydraulic shown in the figure. As shown in the figure, the cylinder barrel of the push rod hydraulic cylinder 210 is arranged opposite to the main support support block 500, and the hydraulic oil storage chamber of the push rod hydraulic cylinder 210 is arranged opposite to the hollow hole in the main support support block, so that one end of the push rod hydraulic cylinder piston rod 211 is inserted into the cylinder barrel of the push rod hydraulic cylinder and the other end is fixed to the main support support block via the push rod cylinder piston rod adjustment head. In this case, the main support support block and the push rod cylinder piston rod adjustment head together serve to seal the push rod hydraulic cylinder. In this case, the main support support block acts as a cylinder cover and also provides support for the main support. It should be noted that those skilled in the art can set the main support support block and the main support in a direct connection method according to actual conditions, such as using bolts, and this embodiment is not specifically limited.

[0056] For example, Figure 1 and Figure 2 As shown, scale lines are provided on the outer surface of the push rod cylinder piston rod adjusting head 220. The relative position between the hollow hole edge line of the main bracket support block 500 and the scale lines on the outer surface of the push rod cylinder piston rod adjusting head 220 can be used to read the connection length between the push rod cylinder piston rod adjusting head 220 and the main bracket support block 500, so as to intuitively read the stroke of the piston rod of the push rod hydraulic cylinder and then read the hydraulic oil pre-adjustment amount of the push rod hydraulic cylinder.

[0057] The disclosed embodiment provides a hydraulic disc plugging device for an in-service pipeline. The stroke of the piston rod of the push rod hydraulic cylinder is adjusted by adjusting the connection length between the piston rod adjusting head of the push rod cylinder and the main bracket support block. In addition, by providing scale lines on the outer surface of the piston rod adjusting head of the push rod cylinder, the stroke of the piston rod of the push rod hydraulic cylinder and the pre-adjustment amount of the hydraulic oil of the push rod hydraulic cylinder can be read intuitively.

[0058] The following will be combined Figure 1 and Figure 2 , further elaborating on the specific structure of the setting hydraulic cylinder.

[0059] like Figure 1 and Figure 2As shown, the piston rod 312 of the setting hydraulic cylinder is provided with a piston on the side facing away from the extrusion mechanism 320, that is, on the right side as shown in the figure. The piston divides the interior of the cylinder barrel 311 of the setting hydraulic cylinder into a first oil chamber close to the extrusion mechanism and a second oil chamber facing away from the extrusion mechanism. As shown in the figure, the first oil chamber is on the left side of the piston, and the second oil chamber is on the right side of the piston. The first oil chamber is connected to the first oil port A of the setting hydraulic cylinder 310, and the second oil chamber is connected to the second oil port B of the setting hydraulic cylinder 310. For example, as shown in the figure, a first oil port A can be provided on the cylinder barrel 311 of the setting hydraulic cylinder on the left side of the piston, and an oil circuit can be provided on the cylinder barrel 311 so that the first oil chamber can be fluidically connected to the setting oil circuit 700 through the first oil port A; a second oil port B can be provided on the cylinder barrel 311 of the setting hydraulic cylinder on the right side of the piston, and an oil circuit can be provided on the cylinder barrel 311 so that the second oil chamber can be fluidically connected to the unsealing oil circuit 600 through the second oil port B.

[0060] For example, Figure 1 and Figure 2 As shown, when oil is supplied to the first oil port A of the setting hydraulic cylinder, oil is supplied to the first oil chamber, and the hydraulic oil drives the piston to move rightward. The piston rod 312 of the setting hydraulic cylinder moves rightward, driving the squeezing mechanism 320 to move rightward, thereby squeezing the sealing assembly 330. The sealing assembly 330 deforms after being squeezed, and this deformation is mainly radial. That is, the outer diameter of the sealing assembly 330 increases, thereby sealing the in-service pipeline 800. When oil is supplied to the second oil port B of the setting hydraulic cylinder, oil is supplied to the second oil chamber, and the hydraulic oil drives the piston to move leftward. The piston rod 312 of the setting hydraulic cylinder moves leftward, driving the squeezing mechanism 320 to move leftward. After the squeezing mechanism moves leftward, the squeezing of the sealing assembly 330 is released, that is, the pressure on the sealing assembly 330 is relieved. Since the sealing assembly 330 is an elastic structure, its deformation is restored after the squeezing is released. That is, the outer diameter is restored, thereby unsealing the in-service pipeline 800.

[0061] The disclosed embodiment provides a hydraulic disc-type sealing device for an in-service pipeline. By setting a connection between the oil chamber and the oil port in the setting hydraulic cylinder, the piston rod of the setting hydraulic cylinder is driven to enable the extrusion device to squeeze or release the sealing component, thereby achieving the sealing or unsealing of the in-service pipeline.

[0062] The following will be combined Figure 2 and Figure 3 , further elaborating on the specific structure of the sealing component.

[0063] like Figure 2 and Figure 3As shown, the sealing assembly 330 includes a first sealing member 333 which is sleeved on the outside of the cylinder barrel 311 of the setting hydraulic cylinder. The first sealing member can slide relative to the cylinder barrel of the setting hydraulic cylinder. The first sealing member 333 is an interference seal. Exemplarily, the first sealing member can be a composite sealing leather cup. It should be noted that the first sealing member is made of elastic material. Those skilled in the art can select the material of the first sealing member according to actual usage requirements. No specific restrictions are imposed in this embodiment.

[0064] like Figure 2 and Figure 3 As shown, the outer diameter of the radial extrusion portion 333A of the first seal 333 is larger than the inner diameter of the in-service pipe 800, forming an interference seal. Therefore, when the plugging head assembly rotates to the set seal position shown in the figure, the radial extrusion portion 333A is interference squeezed in the in-service pipe 800 to seal the in-service pipe 800, thereby achieving a passive seal. A hard layer 333B is provided on the side of the radial extrusion portion 333A facing away from the extrusion mechanism, that is, on the right side in the figure. This hard layer limits the deformation direction of the radial extrusion portion 333A after the interference squeeze, that is, prevents the radial extrusion portion 333A from deforming in a direction away from the extrusion mechanism, that is, from deforming to the right. Exemplarily, the hard layer is a structural component obtained by vulcanizing a mixture of a radial structure and nitrile rubber. The Shore hardness of the hard layer material is greater than the Shore hardness of the radial extrusion portion material, and the difference is 30-40A, so that the hard layer has a greater ability to resist gap sudden damage than the hardness of the radial extrusion portion. It should be noted that those skilled in the art can set the material and structure of the hard layer according to actual usage requirements, and this embodiment does not impose any specific restrictions.

[0065] For example, Figure 2 and Figure 3 As shown, an axial extrusion portion 333C is provided on the side of the radial extrusion portion 333A of the first seal 333 close to the extrusion mechanism 320, that is, on the left side in the figure. The outer diameter of the axial extrusion portion 333C is smaller than the outer diameter of the radial extrusion portion 333A, so that a peristaltic cavity 333D is formed between the axial extrusion portion 333C and the outer side surface of the radial extrusion portion 333A. After being squeezed by the extrusion mechanism 320, the axial extrusion portion 333C is axially compressed and its outer diameter increases. At this time, the deformation is a compressive plastic deformation with axial compression as the main deformation and radial deformation as the auxiliary deformation. After being compressed, a small portion will peristalt into the peristaltic cavity, mainly the portion with an increased outer diameter entering the peristaltic cavity 333D.

[0066] Exemplarily, the volume of the peristaltic chamber 333D is greater than the interference between the first seal 333 and the in-service pipeline 800 .

[0067] For example, Figure 2 and Figure 3 As shown, the side surface where the outer diameter of the radial extrusion portion 333A exceeds the outer diameter of the axial extrusion portion 333C is an inclined surface, so that the peristaltic cavity 333D forms a triangular cavity. It should be noted that those skilled in the art can set the shape of the peristaltic cavity according to actual use requirements, and this embodiment does not impose any specific restrictions. For example, Figure 2 and Figure 3 As shown, the first sealing member 333 is provided with a through hole 333E for sleeve-mounting the first sealing member on the cylinder barrel 311 of the setting hydraulic cylinder.

[0068] The disclosed embodiment provides a hydraulic disc-type sealing device for an in-service pipeline, which realizes passive interference sealing of the in-service pipeline by providing a first sealing member having a radial extrusion portion, a hard layer, an axial extrusion portion and a peristaltic cavity, wherein the radial extrusion portion can ensure the interference sealing of the in-service pipeline by the first sealing member, the hard layer can limit the deformation direction of the radial extrusion portion, and the axial extrusion portion and the peristaltic cavity can ensure that the rubber of the first seal generates peristalsis and flows toward the peristaltic cavity after being extruded, so as to buffer the over-extrusion damage to the first sealing member caused by radial and axial extrusion, and reduce the influence on the extrusion portion after being extruded, thereby ensuring that the first sealing member mainly realizes the interference sealing, while being less affected by the axial extrusion force as much as possible.

[0069] The following will be combined Figure 1 and Figure 2 , further elaborating on the specific structure of the sealing component.

[0070] like Figure 1 and Figure 2 As shown, the sealing assembly 330 also includes a second sealing member 331 which is sleeved on the outside of the cylinder barrel 311 of the setting hydraulic cylinder. The second sealing member can slide relative to the cylinder barrel of the setting hydraulic cylinder. For example, the second sealing member can be a sealing rubber ring. The outer diameter of the second sealing member is smaller than the inner diameter of the in-service pipeline. It should be noted that the second sealing member is made of elastic material. Those skilled in the art can select the material of the second sealing member according to actual usage requirements. No specific limitation is made in this embodiment.

[0071] like Figure 1 and Figure 2As shown, the second seal 331 abuts against the squeezing mechanism 320, that is, as shown in the figure, the left side of the second seal 331 abuts against the right side of the squeezing mechanism 320. When the squeezing mechanism 320 moves to the right, the second seal 331 is squeezed by the squeezing mechanism 320 and deformed, that is, the axial dimension of the sealing assembly 330 is reduced and the radial dimension is increased. Since the outer diameter of the second seal before deformation is smaller than the inner diameter of the in-service pipeline, there is a gap between the second seal and the in-service pipeline, and the gap is filled after the outer diameter of the second seal increases, thereby blocking the in-service pipeline 800; when the squeezing mechanism 320 moves to the left, the squeezing mechanism 320 relaxes the squeezing of the second seal 331, and the second sealing mechanism 331 recovers its deformation without being squeezed, and its outer diameter recovers to unseal the in-service pipeline 800.

[0072] For example, in this embodiment, the stroke of the piston rod of the push rod hydraulic cylinder in the push rod hydraulic cylinder can be adjusted by adjusting the connection length between the piston rod adjusting head of the push rod cylinder and the piston rod of the push rod hydraulic cylinder, that is, the working stroke of the piston rod of the push rod hydraulic cylinder can be adjusted, thereby realizing the stroke control of the piston rod of the setting hydraulic cylinder, so as to control the driving stroke of the piston rod of the setting hydraulic cylinder on the extrusion mechanism, so that the setting hydraulic cylinder can adjust the extrusion degree of the second seal according to different sealing requirements, and realize the controllable adjustment of the sealing degree of the second seal by controlling the extrusion deformation of the sealing assembly through the principle of oil replacement.

[0073] like Figure 1 and Figure 2 As shown, the sealing assembly 330 also includes a pressure test chamber isolation ring 332 which is sleeved on the outside of the cylinder barrel 311 of the setting hydraulic cylinder. The pressure test chamber isolation ring can slide relative to the cylinder barrel of the setting hydraulic cylinder. The pressure test chamber isolation ring 332 abuts against the first seal 333 and the second seal 331 respectively. As shown in the figure, the left side of the pressure test chamber isolation ring 332 abuts against the second seal 331 and the right side abuts against the first seal 333.

[0074] For example, Figure 1 and Figure 2As shown, the outer diameter of the pressure test chamber isolation ring 332 is smaller than the outer diameter of the first seal 333 and the outer diameter of the second seal 331. After the in-service pipeline 800 is blocked, the pressure test chamber isolation ring 332 forms a sealed pressure test ring chamber with the first seal 333, the second seal 331 and the in-service pipeline 800. Exemplarily, the pressure test ring chamber is connected to a pressure detection device to perform a seal test by detecting the pressure in the pressure test ring chamber. Exemplarily, the pressure test ring chamber can be connected to a pressure detection device outside the pipe through an oil pipe, and the pressure value can be read outside the pipe by filling and discharging the medium. Those skilled in the art can select a pressure detection device according to actual usage requirements, such as a pressure gauge or a pressure sensor, and perform the seal test through readings or logical judgments. This embodiment does not impose specific restrictions.

[0075] Exemplarily, the second seal 331 is an active seal. When oil is supplied to the first oil port A of the setting hydraulic cylinder, oil enters the first oil chamber, driving the piston to the right. The rightward movement of the piston rod 312 of the setting hydraulic cylinder drives the squeezing mechanism 320 to the right, thereby squeezing the second seal 331. The squeezing of the second seal 331 causes deformation, primarily resulting in a decrease in axial dimension and an increase in radial dimension. In other words, the outer diameter of the second seal 331 increases, thereby sealing the in-service pipeline 800. When oil is supplied to the second oil port B of the setting hydraulic cylinder, oil enters the second oil chamber, driving the piston to the left. The leftward movement of the piston rod 312 of the setting hydraulic cylinder drives the squeezing mechanism 320 to the left. This leftward movement releases the squeezing of the second seal 331, thereby relieving pressure on the second seal 331. Since the second seal 331 is an elastic structure, its deformation (i.e., its outer diameter) recovers after the squeezing is released, thereby unsealing the in-service pipeline 800.

[0076] For example, Figure 1 and Figure 2 As shown, the sealing assembly 330 also includes an anti-overturning assembly 334 mounted on the outside of the cylinder barrel 311 of the setting hydraulic cylinder. The anti-overturning assembly 334 abuts against the first seal 333 to limit the axial displacement of the first seal 333, that is, to limit the first seal from moving to the right as shown in the figure. As shown in the figure, the left side of the anti-overturning assembly 334 abuts against the first seal 333, and the anti-overturning assembly is fixedly connected to the cylinder barrel of the setting hydraulic cylinder, thereby limiting the movement direction of the sealing assembly and limiting the first sealing movement and deformation. When the first seal 333 is squeezed by the squeezing mechanism 320, the anti-overturning assembly 334 can axially constrain the first seal 333, and the first seal 333 is subjected to the reverse thrust from the anti-overturning assembly 334 to form axial compression deformation.

[0077] Exemplarily, the outer diameter of the anti-overturning assembly is smaller than the inner diameter of the in-service pipeline, so that a gap is directly formed between the anti-overturning assembly and the inner wall of the in-service pipeline, and the gap is defined within a specific threshold.

[0078] For example, because the outer diameter of the anti-overturn assembly 334 is smaller than the inner diameter of the in-service pipeline 800, a gap exists between the anti-overturn assembly 334 and the inner wall of the in-service pipeline 800. When the radial extrusion portion 333A of the first seal is axially extruded by the extrusion mechanism 320, it undergoes compressive plastic deformation, primarily radially with a secondary axial deformation. At this point, the gap between the anti-overturn assembly 334 and the inner wall of the in-service pipeline 800 produces a sudden extrusion change, and the larger the gap, the more destructive the sudden change. Therefore, the hard layer 333B prevents this sudden extrusion change, thereby ensuring the reliability of the sealing structure. At the same time, the anti-overturn assembly limits the amount of overflow deformation of the first seal, preventing it from overturning or excessive overflow damage, thereby ensuring the safety and reliability of pipeline opening sealing and hot work operations.

[0079] For example, Figure 1 and Figure 2 As shown, the sealing head assembly 300 also includes a steering wheel support 340, which is connected to the end of the cylinder barrel 311 of the sealing hydraulic cylinder away from the extrusion mechanism, that is, fixedly connected to the right end of the extrusion mechanism shown in the figure, for installing the steering wheel.

[0080] The disclosed embodiment provides a hydraulic disc-type plugging device for an in-service pipeline. Active sealing of the in-service pipeline is achieved by providing a second sealing member. That is, the second sealing member can be driven by hydraulic pressure to achieve sealing of the in-service pipeline. In addition, a pressure test chamber isolation ring and a pressure test ring chamber are provided to perform sealing inspection. Finally, an anti-overturning assembly is provided to limit axial displacement of the first sealing member, thereby ensuring the sealing reliability of the sealing component.

[0081] The embodiment of the present disclosure provides a hydraulic disc sealing device for an in-service pipeline, which realizes passive sealing by a first seal and active sealing by a second seal. During use, the first seal can be used alone to realize an independent interference seal, or the first seal and the second seal can be used simultaneously to realize a double seal. When conducting a sealing test, the first seal can be used alone to realize an independent interference seal and then conduct the test, or the first seal and the second seal can be used simultaneously to realize a double seal and then conduct the test.

[0082] The following will be combined Figure 1 and Figure 2 , further elaborating on the specific structure of the blocking device.

[0083] For example, Figure 1 and Figure 2As shown, one end of the rotating arm 400 is connected to the axial hole of the main support 100, and the other end is rigidly connected to the cylinder 311 of the sealing hydraulic cylinder. The rotating arm can be driven to rotate around the rotating axis on the main support to drive the sealing head assembly to rotate to the sealing position in the in-service pipeline 800, that is, the sealing hydraulic cylinder 310, the extrusion mechanism 320 and the sealing assembly 330 are all rotated to the sealing position in the in-service pipeline 800, so that the sealing assembly can achieve sealing of the in-service pipeline.

[0084] For example, the upper power source of the setting hydraulic cylinder can be connected in three ways: hydraulic power in the pipe, mechanical power in the pipe, or hydraulic station power outside the pipe. Figure 1 and Figure 2 As shown, the plugging device also includes a tubing cylinder 900, a plugging tee assembly 1000, a gate valve 1100, and a plugging coupler 1200. The tubing cylinder 900 is used to supply hydraulic oil to the plugging device. The hydraulic oil it provides has functions including driving the rotating arm, driving the ram hydraulic cylinder, serving as the upstream power source for the setting hydraulic cylinder, and serving as a backup hydraulic source. The plugging tee assembly is used to connect the plugging device to the in-service pipeline, and the gate valve is used to control the flow of fluid in the vertical direction shown in the figure. The plugging coupler is used to securely connect the plugging device.

[0085] The embodiment of the present disclosure provides a hydraulic disc plugging device for an in-service pipeline. By providing an oil pipe cylinder, a plugging tee assembly, a gate valve and a plugging coupler, the plugging device can be directly fixedly installed on the in-service pipeline, thereby improving the stability, reliability and safety of the installation.

[0086] The following will be combined Figures 4 to 9 , further elaborating on the specific structure of the cleaning device of the blocking device.

[0087] For example, Figure 4 and Figure 5 As shown, a hydraulic disc plugging device for an in-service pipeline is provided, wherein the pipeline wall of the in-service pipeline is provided with an in-service opening mounting hole, and the plugging device comprises:

[0088] a plugging head assembly 300, said plugging head assembly being movably inserted into said in-service pipeline via said in-service opening mounting hole;

[0089] The cleaning brush assembly 1300 includes a plurality of brush bundle assemblies 1310, a brush holder 1320 and a transition holder 1330. The plurality of brush bundle assemblies 1310 are connected to the brush holder 1320, the brush holder 1320 is connected to the transition holder 1330, and the transition holder 1330 is connected to the sealing head assembly 300.

[0090] For example, when the plugging head assembly is movably inserted into the in-service pipeline, the cleaning brush assembly installed on the plugging head assembly moves with the movement of the plugging head assembly, thereby cleaning the iron filings in the in-service pipeline. Specifically, multiple brush bundle assemblies in the cleaning brush assembly move with the plugging head, thereby cleaning the iron filings in the in-service pipeline.

[0091] The disclosed embodiment is a hydraulic disc plugging device for an in-service pipeline, which modularizes the cleaning brush and decomposes it into three modules: a brush bundle assembly, a brush holder, and a transition holder. When the cleaning brush has problems such as brush wire pile-up, deformation, and brush wire breakage, the problematic brush bundle assembly can be replaced separately. At the same time, when performing the replacement operation, the transition holder can be removed from the plugging head for replacement, or the brush holder can be removed from the transition holder for replacement, thereby improving the flexibility of the replacement operation.

[0092] For example, Figure 6 As shown, the brush bundle assembly 1310 includes a bundle tube 1311 and a plurality of brush filaments 1312, one end of each of the plurality of brush filaments being aligned and fixed by the bundle tube. Figure 5 and Figure 6 As shown, the length of the brush filaments in each brush bundle assembly is the same, and the length of the brush filaments in multiple brush bundle assemblies is also the same. Optionally, those skilled in the art can also design different brush bundle assemblies to have different brush filament lengths based on actual usage. For example, the length of the brush filaments in the brush bundle assembly in the middle position is smaller than the length of the brush filaments in the brush bundle assemblies at the two side positions, so that the cleaning brush composed of the brush bundle assemblies can effectively clean iron chips for in-service pipes of different shapes. No specific restrictions are made in this embodiment.

[0093] Exemplarily, the brush filaments are steel brush filaments. Those skilled in the art may also select brush filaments made of other materials according to actual usage conditions. This embodiment is not specifically limited.

[0094] For example, during the preparation process, the brush filaments are bundled and inserted into the bundle tube and aligned with the end surface of the bundle tube. After alignment, the bundle tube is shrunk to compress the brush filaments, thereby completing the preparation of the brush bundle assembly.

[0095] The disclosed embodiment provides a hydraulic disc plugging device for an in-service pipeline, which uses a bundle tube and brush wire design to modularize the brush wire assembly. Since multiple brush wires are fixed into a bundle by the bundle tube, the brush wires are less likely to have problems such as wire deformation and brush wire breakage during the cleaning operation, thereby increasing the service life of the brush wires. In addition, this design makes it difficult for the cleaning brush to carry iron filings from the opening, thereby avoiding the problem of iron filings from the opening falling into the valve core structure of the gate valve and affecting the sealing and opening and closing of the gate valve.

[0096] For example, Figure 7 and Figure 8 As shown, the brush holder 1320 is provided with a plurality of brush bundle assembly in-service opening mounting holes 1321, into which the brush bundle assembly bundle tube 1311 can be inserted. For example, those skilled in the art can arrange the plurality of brush bundle assembly in-service opening mounting holes 1321 according to actual use requirements, for example, in a straight line or in multiple straight lines to form an array, and this is not specifically limited in this embodiment.

[0097] For example, during the preparation process, the bundle tube end faces are inserted into the in-service opening mounting holes of the brush bundle assembly, and the inserted bundle tube end faces are welded by argon arc welding. After welding, the entire inner arc surface is smoothed to form a Figure 8 The inner curved surface structure shown.

[0098] For example, Figures 7 to 9 As shown, the brush holder 1320 is provided with a plurality of transition frame in-service opening mounting holes 1322, and the transition holder 1330 is provided with in-service opening mounting holes 1331 corresponding to the transition frame in-service opening mounting holes 1322, so that the brush holder 1320 and the transition holder 1330 are mechanically connected by fasteners passing through the transition frame in-service opening mounting holes and the in-service opening mounting holes. For example, the fasteners can be bolts.

[0099] For example, Figure 7 and Figure 8 As shown, the brush holder 1320 adopts an L-shaped long arc structure. Figure 7 As shown, the cross section of the brush holder along the CC' direction is L-shaped.

[0100] For example, Figure 7 and Figure 8 As shown, the plurality of brush bundle assembly in-service opening mounting holes 1321 are arranged at one end of the brush holder 1320 and arranged in a straight line, and the plurality of transition frame in-service opening mounting holes 1322 are arranged at the other end of the brush holder on the same plane as the brush bundle assembly in-service opening mounting holes and arranged in a straight line. Figure 7 and Figure 8 It can be seen that since the brush holder adopts an L-shaped cross-section structure, the in-service opening mounting hole of the brush bundle assembly is set at the end with the larger thickness on the inner arc surface of the brush holder, while the in-service opening mounting hole of the transition frame is set at the end with the smaller thickness on the inner arc surface of the brush holder. Due to the L-shaped structure of the brush holder, there is a certain thickness difference between the two ends of the inner arc surface in the C-C' direction, which makes the installation position of the brush bundle assembly and the installation position of the transition frame have a certain distance, thereby reducing the difficulty of installation.

[0101] For example, Figure 8 and 9As shown, the outer side 1333 of the transition frame 1330 is arc-shaped corresponding to the inner side of the brush frame 1320, so that the transition frame 1330 can be matched with the brush frame 1320. For example, the transition frame and the brush frame can be connected by inserting bolts into the transition frame in-service opening mounting holes and the in-service opening mounting holes on the brush frame, so that the outer arc surface of the transition frame and the inner arc surface of the brush frame are closely matched and installed.

[0102] For example, Figure 8 and 9 As shown, a connecting groove 1334 is provided on the inner side of the transition frame 1330, and a plugging head in-service opening mounting hole 1332 is provided on the side of the connecting groove 1334, and a connecting hole (not shown in the figure) corresponding to the plugging head in-service opening mounting hole 1332 is provided on the plugging head assembly, so as to mechanically connect the transition frame and the plugging head assembly by fasteners provided in the plugging head in-service opening mounting hole and the connecting hole. For example, Figure 5 As shown, the fastener may be a bolt 1335 .

[0103] For example, Figure 9 As shown, those skilled in the art can set the specific structure and number of the connecting grooves according to actual usage conditions. The connecting grooves correspond to the structure of the plugging head assembly and are not specifically limited in this embodiment.

[0104] The embodiment of the present disclosure discloses a hydraulic disc plugging device for an in-service pipeline. By designing the specific structures of the brush holder and the mounting frame, the brush bundle assembly can be flexibly installed on the brush holder and then installed on the plugging head assembly through the transition frame. The modular design provides installation flexibility.

[0105] For example, Figure 2 and Figure 4 As shown, the plugging head assembly 300 includes a steering wheel support 340, to which multiple cleaning brush assemblies 1300 are mounted. For example, the steering wheel support 340 is provided with a connection hole (not shown) corresponding to the plugging head's in-service opening mounting hole 1332, allowing bolts to be inserted into the connecting transition frame and the steering support to achieve the installation of the cleaning brush assembly to the plugging head assembly. For example, those skilled in the art may adjust the number and installation positions of the cleaning brush assemblies based on actual usage, and this is not specifically limited in this embodiment.

[0106] A hydraulic disc plugging device for an in-service pipeline in an embodiment of the present disclosure provides multiple cleaning brush assemblies on a steering wheel support to achieve multiple cleaning of iron filings, thereby improving the safety and accuracy of pipeline maintenance and repair operations.

[0107] This embodiment also provides a method for preparing a hydraulic disc plugging device for an in-service pipeline, comprising:

[0108] Align one end of multiple brush filaments and fix them with a bundle tube to obtain a brush bundle assembly;

[0109] Inserting a plurality of brush bundle assemblies into the in-service opening mounting holes of the brush bundle assemblies in the arc-shaped brush holder, respectively, fixing the brush bundle assemblies by argon arc welding, and smoothing the surfaces after welding, that is, smoothing the inner arc surface of the brush holder;

[0110] The brush holder is connected to the transition frame by mounting. For example, the mechanical connection is achieved by inserting bolts into the transition frame in-service opening mounting holes on the brush holder and corresponding in-service opening mounting holes on the transition frame.

[0111] The transition frame is installed and connected to the plugging head assembly. For example, the mechanical connection is achieved by inserting bolts into the in-service opening installation holes of the plugging head on the transition frame and the connecting holes on the plugging head assembly.

[0112] A method for preparing a hydraulic disc plugging device for an in-service pipeline according to an embodiment of the present disclosure realizes the modular installation of a cleaning brush assembly onto a plugging head assembly. The cleaning brush is modularly processed and decomposed into three modules: a brush bundle assembly, a brush holder, and a transition holder. When problems such as brush wire deformation, brush wire breakage, etc. occur in the cleaning brush, the problematic brush bundle assembly can be replaced separately. At the same time, when performing the replacement operation, the transition holder can be removed from the plugging head for replacement, or the brush holder can be removed from the transition holder for replacement, thereby improving the flexibility of the replacement operation.

[0113] Unless otherwise specified, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which this disclosure belongs. The "including" or "comprising" used in this disclosure neither limits the shapes, numbers, steps, actions, operations, components, originals and / or their groups mentioned, nor excludes the appearance or addition of one or more other different shapes, numbers, steps, actions, operations, components, originals and / or their groups, or the addition of these. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number and order of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0114] In some descriptions of the invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," and similar expressions are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect through an intermediate medium, and may be internal connections between two elements or mutual interactions between two elements. In addition, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to indicate relative positional relationships. When the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0115] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0116] It should also be understood that when a layer is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. It should also be understood that when an element (such as a layer, region or substrate) is referred to as being "on," "connected to," "electrically connected to," or "electrically coupled to" another element, it can be directly on, directly connected or coupled to the other element, or one or more intervening elements may be present. Conversely, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers present. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.)

[0117] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn in accordance with actual proportional relationships, and that the techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices shown should be considered part of the authorized specification. In all examples shown and discussed herein, any specific other examples may have different values. It should be noted that similar symbols and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0118] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0119] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A hydraulic disc plugging device for an in-service pipeline, characterized in that: The pipeline wall of the in-service pipeline is provided with an in-service opening installation hole, and the blocking device comprises: a main bracket, wherein a first end of the main bracket is movably inserted into the in-service pipeline through the in-service opening mounting hole; The plugging head assembly includes a setting hydraulic cylinder, an extrusion mechanism, and a sealing component; the cylinder body of the setting hydraulic cylinder is disposed in the in-service pipeline, the extrusion mechanism is connected to the piston rod of the setting hydraulic cylinder, and the sealing component is disposed outside the cylinder barrel of the setting hydraulic cylinder and abuts against the extrusion mechanism; the piston rod of the setting hydraulic cylinder drives the extrusion mechanism to squeeze or release the sealing component to block or unseal the in-service pipeline; The sealing assembly includes a first sealing member sleeved on the outer side of the cylinder barrel of the setting hydraulic cylinder. The outer diameter of the radial extrusion portion of the first sealing member is larger than the inner diameter of the in-service pipeline. The first sealing member is subjected to interference compression in the in-service pipeline to seal the in-service pipeline. A hard layer is provided on a side of the radial extrusion portion facing away from the extrusion mechanism to limit the deformation direction of the radial extrusion portion after being subjected to interference compression. An axial extrusion portion is provided on a side of the radial extrusion portion of the first seal close to the extrusion mechanism, and the rubber inside the pipeline of the axial extrusion portion is smaller than the inner diameter of the pipeline; After being squeezed by the squeezing mechanism, the axial squeezing portion is axially compressed and its outer diameter increases, and the portion with the increased outer diameter enters the peristaltic cavity; The sealing assembly further includes a second sealing member sleeved on the outside of the cylinder barrel of the setting hydraulic cylinder; The second sealing member abuts against the extrusion mechanism, and after being squeezed by the extrusion mechanism, it is radially deformed and its outer diameter increases to seal the in-service pipeline; The sealing assembly further includes a pressure test chamber isolation ring sleeved on the outer side of the cylinder barrel of the setting hydraulic cylinder, wherein the pressure test chamber isolation ring abuts against the first sealing member and the second sealing member respectively; The outer diameter of the pressure test chamber isolation ring is smaller than the outer diameter of the first seal and the outer diameter of the second seal. After the in-service pipeline is blocked, the pressure test chamber isolation ring, the first seal, the second seal and the in-service pipeline form a closed pressure test ring chamber.

2. The hydraulic disc plugging device for an in-service pipeline according to claim 1, characterized in that: The hard layer adopts a radial structure and is vulcanized and molded using nitrile rubber.

3. The hydraulic disc plugging device for an in-service pipeline according to claim 1, characterized in that: The volume of the peristaltic chamber is greater than the interference between the first seal and the in-service pipeline.

4. The hydraulic disc plugging device for an in-service pipeline according to claim 3, characterized in that: The side surface where the outer diameter of the radial extrusion portion exceeds the outer diameter of the axial extrusion portion is an inclined surface, so that the peristaltic cavity forms a triangular cavity.

5. The hydraulic disc plugging device for in-service pipelines according to claim 1, characterized in that: The pressure test ring cavity is communicated with a pressure detection device so as to perform a sealing test by detecting the pressure in the pressure test ring cavity.

6. The hydraulic disc plugging device for an in-service pipeline according to claim 5, characterized in that: The sealing assembly further includes an anti-overturning assembly sleeved on the outside of the cylinder barrel of the setting hydraulic cylinder, and the anti-overturning assembly abuts against the first sealing member to limit the axial displacement of the first sealing member.

7. The hydraulic disc plugging device for an in-service pipeline according to claim 6, characterized in that: The plugging head assembly further includes a steering wheel support, which is connected to an end of the cylinder barrel of the setting hydraulic cylinder away from the extrusion mechanism and is used for mounting a steering wheel.

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