Hydraulic disc type plugging device for in-service pipeline

Abstract

The invention 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 trepanning mounting hole, the plugging device comprises a main support, and the first end of the main support is movably inserted into the in-service pipeline through the in-service trepanning mounting hole; the ejector rod hydraulic cylinder assembly comprises an ejector rod hydraulic cylinder, a cylinder barrel of the ejector rod hydraulic cylinder is arranged at the first end of the main support, and a piston rod of the ejector rod hydraulic cylinder deviates from the first end of the main support; the plugging head assembly comprises a setting hydraulic cylinder, an extrusion mechanism and a sealing assembly; and a cylinder body of the setting hydraulic cylinder is arranged in the in-service pipeline. According to the hydraulic disc type plugging device for the in-service pipeline, hydraulic driving of the interior of the plugging structure to the plugging head assembly is achieved through the ejector rod hydraulic cylinder assembly, driving of the setting hydraulic cylinder can be achieved through mechanical movement of a piston rod of the ejector rod hydraulic cylinder, and then driving of the extrusion mechanism to the sealing assembly is achieved; and blocking or unblocking of the in-service pipeline is achieved.

Description

Technical Field

[0001] The present disclosure relates to a sealing device for extruding and deforming an in-service inner pipe sealing ring, and particularly to a hydraulic disc sealing device for an in-service pipeline, belonging to the technical field of pipeline maintenance and emergency repair. Background Art

[0002] At present, in the domestic construction of opening and plugging of in-service oil and gas pipelines, the general traditional mechanical steering disc sealing device has a sealing system belonging to the single leather bowl rubber interference compression deformation sealing technology. In the case of a pipeline with a straight weld or a spiral weld, there is a situation of micro-leakage in the seal, and it is necessary to lower the isolation bladder a second time to carry out hot work, which has certain potential safety hazards. Summary of the Invention

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

[0004] In one aspect of the present disclosure, there is provided a hydraulic disc sealing device for an in-service pipeline. An in-service opening installation hole is provided on the pipe wall of the in-service pipeline. The sealing device includes: A main bracket, the first end of the main bracket is movably inserted into the in-service pipeline through the in-service opening installation hole; A plugging head assembly, the plugging head assembly includes a setting cylinder, an extrusion mechanism and a sealing component; the cylinder body of the setting cylinder is arranged in the in-service pipeline, the extrusion mechanism is connected to the piston rod of the setting cylinder, and the sealing component is arranged outside the cylinder barrel of the setting cylinder and abuts against the extrusion mechanism; the piston rod of the setting cylinder drives the extrusion mechanism to extrude or relax the sealing component to plug or unseal the in-service pipeline; The sealing component includes a first seal sleeved outside the cylinder barrel of the setting cylinder. The outer diameter of the radial extrusion part of the first seal is larger than the inner diameter of the in-service pipeline, and it is interference extruded in the in-service pipeline to seal the in-service pipeline; a hard layer is arranged on the side of the radial extrusion part away from the extrusion mechanism to limit the deformation direction of the radial extrusion part after being interference extruded.

[0005] Optionally, the hard layer adopts a meridian structure and is vulcanized and formed with nitrile rubber.

[0006] Optionally, an axial extrusion part is arranged on the side of the radial extrusion part of the first seal close to the extrusion mechanism, and the inner rubber of the axial extrusion part in the pipeline is smaller than the inner diameter of the pipeline; After being extruded by the extrusion mechanism, the axial extrusion part is axially compressed and the outer diameter increases, and the increased part of the outer diameter enters the peristaltic cavity.

[0007] Optionally, the volume of the peristaltic cavity is greater than the interference amount between the first seal and the in-service pipeline.

[0008] Optionally, the side surface where the outer diameter of the radial extrusion part exceeds the outer diameter of the axial extrusion part is an inclined surface, so that the peristaltic cavity forms a triangular cavity.

[0009] Optionally, the sealing assembly further includes a second seal sleeved on the outer side of the cylinder barrel of the setting hydraulic cylinder; The second seal abuts against the extrusion mechanism, and after being extruded by the extrusion mechanism, it generates a radial deformation, and the outer diameter increases to block the in-service pipeline.

[0010] Optionally, the sealing assembly further includes a pressure test cavity isolation ring sleeved on the outer side of the cylinder barrel of the setting hydraulic cylinder, and the pressure test cavity isolation ring abuts against the first seal and the second seal respectively; The outer diameter of the pressure test cavity isolation ring is smaller than the outer diameters of the first seal and the second seal. After the in-service pipeline is blocked, the pressure test cavity isolation ring and the first seal, the second seal and the in-service pipeline form a closed pressure test ring cavity.

[0011] Optionally, the pressure test ring cavity is communicated with a pressure detection device to perform seal inspection by detecting the pressure in the pressure test ring cavity.

[0012] Optionally, the sealing assembly further includes an anti-overturning assembly sleeved on the outer side of the cylinder barrel of the setting hydraulic cylinder, and the anti-overturning assembly abuts against the first seal to limit the axial displacement of the first seal.

[0013] Optionally, the plugging head assembly further includes a steering wheel support member, and the steering wheel support member is connected to the end of the cylinder barrel of the setting hydraulic cylinder far from the extrusion mechanism for installing a steering wheel.

[0014] An in-service pipeline hydraulic disc plugging device according to an embodiment of the present disclosure realizes passive interference plugging of an in-service pipeline by setting a first seal with a radial extrusion part and a hard layer. Among them, the radial extrusion part can ensure the interference seal of the first seal to the in-service pipeline, and the hard layer can limit the deformation direction of the radial extrusion part, so as to ensure that the first seal realizes radial interference seal. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of an in-service pipeline hydraulic disc plugging device according to an embodiment of the present disclosure; Figure 2 is a partial enlarged view of an in-service pipeline hydraulic disc plugging device according to another embodiment of the present disclosure; Figure 3Schematic diagram of the first seal of a hydraulic disc plugging device for in-service pipelines according to another embodiment of the present disclosure; Figure 4 Schematic diagram of a hydraulic disc plugging device for in-service pipelines according to another embodiment of the present disclosure; Figure 5 Schematic diagram of the cleaning brush assembly of a hydraulic disc plugging device for in-service pipelines according to another embodiment of the present disclosure; Figure 6 Schematic diagram of the brush bundle assembly of a hydraulic disc plugging device for in-service pipelines according to another embodiment of the present disclosure; Figure 7 Schematic diagram of the brush holder of a hydraulic disc plugging device for in-service pipelines according to another embodiment of the present disclosure; Figure 8 Schematic diagram of the brush holder structure of a hydraulic disc plugging device for in-service pipelines according to another embodiment of the present disclosure; Figure 9 Schematic diagram of the mounting bracket of a hydraulic disc plugging device for in-service pipelines according to another embodiment of the present disclosure. Detailed implementation manners

[0016] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation manners. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0017] Unless otherwise specifically stated, the technical terms or scientific terms used in the present disclosure should have the ordinary meaning understood by those of ordinary skill in the art to which the present disclosure belongs. The "including" or "comprising" used in the present disclosure neither limits the mentioned shapes, numbers, steps, actions, operations, components, elements and / or their groups, nor excludes the occurrence or addition of one or more other different shapes, numbers, steps, actions, operations, components, elements and / or their groups, or the addition of these. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity and order of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality" means two or more, unless otherwise clearly and specifically defined.

[0018] In some descriptions of the invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "coupled" or "fixed" do not refer to physical or mechanical connections, but may include electrical connections, whether direct or indirect through an intermediate medium, and may be the internal connection of two components or the interaction relationship between two components. Also, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to represent the relative positional relationship. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0019] In the present disclosure, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0020] It should also be understood that when a layer is referred to as being "on" another layer or substrate, it may be directly on the other layer or substrate, or there may be an intervening layer; 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 may be directly on the other element, directly connected or coupled to the other element, or there may be one or more intervening elements. In contrast, when an element is referred to as being "directly on", "directly connected to" or "directly coupled to" another element or layer, there is no intervening element or layer. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. Unless otherwise specifically stated, the relative settings, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices shown should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific other examples may have different values. It should be noted that similar symbols and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0021] Next, reference will be made to Figure 1 and Figure 2 to describe a hydraulic disc plugging device for an in-service pipeline according to an embodiment of the present disclosure.

[0022] As Figure 1 and Figure 2 shown, a hydraulic disc plugging device for an in-service pipeline provided in this embodiment, the in-service pipeline 800 is an in-service oil and gas pipeline, that is, the working pipeline to be plugged. An in-service opening installation hole is provided on the pipeline wall of the in-service pipeline. The plugging device enters the in-service pipeline through the in-service opening installation hole. The plugging device includes a main bracket 100, a jack hydraulic cylinder assembly 200, and a plugging head assembly 300. The plugging device further includes a rotating arm 400. The first end of the main bracket 100 is movably inserted into the in-service pipeline 800 through the in-service opening installation hole. One end of the rotating arm 400 is rotatably connected to the main bracket 100 through a rotating shaft. The other end of the rotating arm 400 is fixedly connected to the plugging head assembly 300. The rotating arm 400 can be driven to rotate around the rotating shaft so that the plugging head assembly 300 can rotate 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 shafts according to actual usage requirements, and no specific limitations are made in this embodiment.

[0023] As Figure 1 and Figure 2As shown, the lower end of the main bracket 100 is inserted into the in-service pipeline 800 through the in-service opening installation hole. The left end of the rotating arm 400 is rotatably connected to the main bracket 100, and the right end of the rotating arm 400 is fixedly connected to the plugging head assembly 300. The vertical displacement amount driven by the main bracket and the attitude amount 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 rotated to the setting position, that is, the axial position of the plugging head assembly 300 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 the actual situation, such as using hydraulic drive, which is not specifically limited in this embodiment.

[0024] As Figure 1 and Figure 2 shown, the ejector rod hydraulic cylinder assembly 200 includes an ejector rod hydraulic cylinder 210. The cylinder barrel of the ejector rod hydraulic cylinder is arranged at the first end of the main bracket 100, that is, the lower end of the main bracket in the figure. The piston rod 211 of the ejector rod hydraulic cylinder deviates from the first end of the main bracket 100, that is, the lower end of the main bracket in the figure. It can be seen from the figure that a piston is arranged at the upper end of the piston rod 211 of the ejector rod hydraulic cylinder and is movably inserted into the cylinder barrel of the ejector rod hydraulic cylinder 210.

[0025] As Figure 1 and Figure 2 shown, the plugging head assembly 300 includes a setting hydraulic cylinder 310, an extrusion mechanism 320 and a sealing assembly 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 into 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. The piston rod of the setting hydraulic cylinder can drive the extrusion mechanism to make an axial reciprocating motion. The sealing assembly 330 is arranged outside the cylinder barrel 311 of the setting hydraulic cylinder and abuts against the extrusion mechanism 320. As Figure 2 shown, the left side of the piston rod 312 of the setting hydraulic cylinder is fixedly connected to the extrusion mechanism 320, and the right side of the extrusion mechanism abuts against the sealing assembly 330. It should be noted that the sealing assembly 330 is an elastic structure. Those skilled in the art can set the material and structure of the sealing assembly according to the actual situation, which is not specifically limited in this embodiment. It should be noted that those skilled in the art can set the connection method between the extrusion mechanism and the piston rod of the setting hydraulic cylinder according to the actual situation, such as using bolt connection, which is not specifically limited in this embodiment.

[0026] Exemplarily, as Figure 1 and Figure 2As shown, an inner hole is provided on the side of the squeezing mechanism 320 facing the setting cylinder, that is, on the right side in the figure. The cylinder barrel 311 of the setting cylinder is movably inserted into the inner hole. When the squeezing mechanism is driven by the piston rod 312 of the setting cylinder to move, the cylinder barrel of the setting cylinder can slide relative to each other in the inner hole. As shown in the figure, it is a left-right sliding movement. Through the setting of the inner hole, the direction of relative movement between the squeezing mechanism and the setting cylinder can be restricted.

[0027] As Figure 1 and Figure 2 shown, the first oil port A of the setting cylinder 310 is communicated with the first oil port A' of the ejector rod cylinder 210, and the second oil port B of the setting cylinder 310 is communicated with the second oil port B' of the ejector rod cylinder 210, so as to drive the piston rod 312 of the setting cylinder through the hydraulic oil in the cylinder barrel of the ejector rod cylinder 210 to drive the squeezing mechanism 320 to move to squeeze or relax the sealing assembly to block or unblock the in-service pipeline.

[0028] Exemplarily, the first oil port A of the setting cylinder 310 can be fluidly communicated with the first oil port A' of the ejector rod cylinder 210 through the setting oil circuit 700, and the second oil port B of the setting cylinder 310 can be fluidly communicated with the second oil port B' of the ejector rod cylinder 210 through the unblocking oil circuit 600. Those skilled in the art can determine the actual connection method according to the actual situation, and no specific limitation is made in this embodiment.

[0029] Exemplarily, as Figure 1 and Figure 2 shown, when the piston rod 211 of the ejector rod cylinder moves upward, the hydraulic oil in the ejector rod cylinder 210 flows out through the first oil port A', flows into the first oil port A of the setting cylinder 310 through the setting oil circuit 700. The hydraulic oil drives the piston rod 312 of the setting cylinder to move to the right, thereby driving the squeezing mechanism 320 to move to the right. The squeezing mechanism squeezes the sealing assembly 330 to the right. After being squeezed, the sealing assembly 330 deforms. This deformation is mainly a reduction in the axial dimension and an increase in the radial dimension, thereby blocking the in-service pipeline 800.

[0030] Exemplarily, as Figure 1 and Figure 2 shown, when the piston rod 211 of the ejector rod cylinder moves downward, the hydraulic oil in the ejector rod cylinder 210 flows out through the second oil port B', flows into the second oil port B of the setting cylinder 310 through the unblocking oil circuit 600. The hydraulic oil drives the piston rod 312 of the setting cylinder to move to the left, thereby driving the squeezing mechanism 320 to move to the left. After the squeezing mechanism moves to the left, the squeezing of the sealing assembly 330 is relaxed, that is, the pressure on the sealing assembly 330 is released. Since the sealing assembly 330 is an elastic structure, its deformation is restored after the squeezing is relaxed, that is, the outer diameter is restored, thereby unblocking the in-service pipeline 800.

[0031] The disclosed embodiment is a hydraulic disc plugging device for an in-service pipeline, which realizes hydraulic drive of the plugging head assembly inside the plugging structure through a push rod hydraulic cylinder assembly, 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 connects the sealing hydraulic cylinder through an 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 plugging or unblocking 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 plugging device, the hydraulic drive of the plugging head assembly realizes the hydraulic transmission inside the plugging device structure, thereby avoiding the complex structure of the external hydraulic transmission structure, improving the reliability of the plugging device, and because the push rod hydraulic cylinder itself has a simple structure, its preparation process is simple, the construction cost is reduced, and the plugging performance is improved.

[0032] The following will be combined Figure 1 and Figure 2 , further elaborating on the specific structure of the push rod hydraulic cylinder assembly.

[0033] like Figure 1 and Figure 2 As shown, the push rod hydraulic cylinder assembly 200 also includes a push rod cylinder piston rod adjusting head 220, and the push rod cylinder piston rod adjusting head 220 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 itself and the piston rod 211 of the push rod hydraulic cylinder.

[0034] 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, and the push rod cylinder piston rod adjusting head 220 is provided with an adjusting through hole, and 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, and the adjusting through hole and the adjusting hole are not shown in the figure, and those skilled in the art may adjust them according to the actual setting, and no specific limitation is made in this embodiment.

[0035] For example, Figure 1 and Figure 2As shown, the adjustment through-hole of the adjusting head 220 of the push rod cylinder piston rod is threadedly connected to the adjustment hole of the piston rod 211 of the push rod hydraulic cylinder. The connection length between the adjusting head 220 of the push rod cylinder piston rod and the piston rod 211 of the push rod hydraulic cylinder is adjusted by the amount of thread screwing in or out. Exemplarily, the fastener can be a locking screw, that is, the adjusting head 220 of the push rod cylinder piston rod and the piston rod 211 of the push rod hydraulic cylinder are locked and fixed by the locking screw.

[0036] Exemplarily, such as Figure 1 and Figure 2 As shown, a cylinder barrel of the push rod hydraulic cylinder is formed by machining on the main bracket 100, that is, a cavity is formed by machining on the main bracket 100 to serve as a hydraulic oil accommodating cavity of the push rod hydraulic cylinder. The piston rod 211 of the push rod hydraulic cylinder can be inserted into the cavity. Exemplarily, a mounting cavity for the push rod hydraulic cylinder can also be provided on the main bracket 100, that is, a cavity is formed by machining on the main bracket 100. At this time, the mounting cavity is used to insert the cylinder barrel of the independently formed 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.

[0037] In an embodiment of the present disclosure, an in-service pipeline hydraulic disc plugging device adjusts the connection length between the adjusting head of the push rod cylinder piston rod and the piston rod of the push rod hydraulic cylinder to adjust the stroke of the piston rod of the push rod hydraulic cylinder in the push rod hydraulic cylinder, that is, to adjust the working stroke of the piston rod of the push rod hydraulic cylinder, thereby adjusting the hydraulic oil volume that can flow out from the first oil port A' and the second oil port B' of the push rod hydraulic cylinder, and further adjusting the hydraulic oil volume that can flow into the first oil port A and the second oil port B of the setting cylinder. By adjusting the hydraulic oil volume flowing into the setting cylinder, the stroke control of the piston rod of the setting cylinder is realized, so as to control the driving stroke of the piston rod of the setting cylinder on the extrusion mechanism, so that the setting cylinder can adjust the extrusion degree on the sealing component according to different sealing requirements, and the extrusion deformation amount of the sealing component is controlled through the oil volume replacement principle to realize the controllable adjustment of the plugging degree of the plugging head assembly.

[0038] Next, in combination with Figure 1 and Figure 2 , the specific structure of the main bracket support block will be further elaborated.

[0039] Such as Figure 1 and Figure 2As shown, the plugging device further includes a main bracket support block 500. A hollow hole is provided on the main bracket support block 500. The adjusting head 220 of the piston rod of the ejector rod cylinder is movably inserted into 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 ejector rod hydraulic cylinder is connected to the adjusting head 220 of the piston rod of the ejector rod cylinder, therefore, by adjusting the length of the adjusting head 220 of the piston rod of the ejector rod cylinder inserted into the hollow hole, the stroke of the piston rod 211 of the ejector rod hydraulic cylinder can be adjusted, thereby adjusting the hydraulic oil volume of the ejector rod hydraulic cylinder.

[0040] Exemplarily, as Figure 1 With Figure 2 As shown, the main bracket support block 500 is mechanically connected to the main bracket 100, so that the main bracket support block 500 and the adjusting head 200 of the piston rod of the ejector rod cylinder inserted therein jointly seal one end of the cylinder barrel of the ejector rod hydraulic cylinder facing away from the main bracket, that is, the lower end of the ejector rod hydraulic pressure shown in the figure. As shown in the figure, the cylinder barrel of the ejector rod hydraulic cylinder 210 is disposed opposite to the main bracket support block 500, and the hydraulic oil accommodating cavity of the ejector rod hydraulic cylinder 210 is disposed opposite to the hollow hole in the main bracket support block, so that one end of the piston rod 211 of the ejector rod hydraulic cylinder is inserted into the cylinder barrel of the ejector rod hydraulic cylinder, and the other end is fixed to the main bracket support block through the adjusting head of the piston rod of the ejector rod cylinder. At this time, the combination of the main bracket support block and the adjusting head of the piston rod of the ejector rod cylinder jointly serves to seal the ejector rod hydraulic cylinder. At this time, the main bracket support block functions as a cylinder head and also functions to support the main bracket. It should be noted that those skilled in the art can set the connection method between the main bracket support block and the main bracket according to the actual situation, such as using bolt connection, which is not specifically limited in this embodiment.

[0041] Exemplarily, as Figure 1 With Figure 2 As shown, scale lines are provided on the outer surface of the adjusting head 220 of the piston rod of the ejector rod cylinder. The connection length between the adjusting head 220 of the piston rod of the ejector rod cylinder and the main bracket support block 500 can be read in cooperation by the relative position between the edge line of the hollow hole of the main bracket support block 500 and the scale lines on the outer surface of the adjusting head 220 of the piston rod of the ejector rod cylinder, so as to intuitively read the stroke of the piston rod of the ejector rod hydraulic cylinder, and further read the pre-adjustment amount of the hydraulic oil of the ejector rod hydraulic cylinder.

[0042] In an in-service pipeline hydraulic disc plugging device according to an embodiment of the present disclosure, the stroke of the piston rod of the ejector rod hydraulic cylinder is adjusted by adjusting the connection length between the adjusting head of the piston rod of the ejector rod cylinder and the main bracket support block. In addition, scale lines are provided on the outer surface of the adjusting head of the piston rod of the ejector rod cylinder to intuitively read the stroke of the piston rod of the ejector rod hydraulic cylinder, and further read the pre-adjustment amount of the hydraulic oil of the ejector rod hydraulic cylinder.

[0043] Next, it will be combined withFigure 1 and Figure 2 , further elaborating on the specific structure of the setting-down hydraulic cylinder.

[0044] As Figure 1 shown in Figure 2 , a piston is provided on one side of the piston rod 312 of the setting-down hydraulic cylinder away from the extrusion mechanism 320, that is, on the right side shown in the figure. The piston divides the interior of the cylinder barrel 311 of the setting-down hydraulic cylinder into a first oil chamber close to the extrusion mechanism and a second oil chamber 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 communicates with the first oil port A of the setting-down hydraulic cylinder 310, and the second oil chamber communicates with the second oil port B of the setting-down hydraulic cylinder 310. Exemplarily, as shown in the figure, the first oil port A can be provided on the cylinder barrel 311 of the setting-down hydraulic cylinder on the left side of the piston, and an oil passage is provided on the cylinder barrel 311 so that the first oil chamber can be in fluid communication with the setting-down oil passage 700 through the first oil port A; the second oil port B is provided on the cylinder barrel 311 of the setting-down hydraulic cylinder on the right side of the piston, and an oil passage is provided on the cylinder barrel 311 so that the second oil chamber can be in fluid communication with the releasing oil passage 600 through the second oil port B. Exemplarily, as Figure 1 shown in Figure 2 , when the first oil port A of the setting-down hydraulic cylinder is supplied with oil, the first oil chamber is filled with oil, and the hydraulic oil drives the piston to move to the right. The piston rod 312 of the setting-down hydraulic cylinder moves to the right to drive the extrusion mechanism 320 to move to the right, thereby squeezing the sealing assembly 330. After being squeezed, the sealing assembly 330 deforms, and this deformation is mainly a radial deformation, that is, the outer diameter of the sealing assembly 330 increases, and then it seals the in-service pipeline 800. When the second oil port B of the setting-down hydraulic cylinder is supplied with oil, the second oil chamber is filled with oil, and the hydraulic oil drives the piston to move to the left. The piston rod 312 of the setting-down hydraulic cylinder moves to the left to drive the extrusion mechanism 320 to move to the left. After the extrusion mechanism moves to the left, the extrusion on 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 recovers after the extrusion is released, that is, the outer diameter recovers, and then the in-service pipeline 800 is released.

[0045] In an embodiment of the present disclosure, an in-service pipeline hydraulic disc plugging device realizes the driving of the piston rod of the setting-down hydraulic cylinder by setting the connection mode between the oil chamber and the oil port in the setting-down hydraulic cylinder, so as to enable the extrusion device to squeeze or release the sealing assembly, thereby realizing the plugging or releasing of the in-service pipeline.

[0046] Next, in combination with Figure 2 and Figure 3 , the specific structure of the sealing assembly will be further elaborated.

[0047] AsFigure 2 and Figure 3 As shown in Figure 3 , the sealing assembly 330 includes a first seal 333 sleeved outside the cylinder barrel 311 of the setting cylinder. The first seal can slide relative to the cylinder barrel of the setting cylinder. The first seal 333 is an interference seal. Exemplarily, the first seal can be a composite seal cup. It should be noted that the first seal is made of an elastic material. Those skilled in the art can select the material of the first seal according to actual usage requirements, and no specific limitation is made in this embodiment.

[0048] As Figure 2 and Figure 3 As shown in Figure 2 and Figure 3 , the outer diameter of the radial extrusion part 333A of the first seal 333 is greater than the inner diameter of the in-service pipeline 800, which is an interference sealing part. Therefore, when the plugging head assembly rotates to the setting position in the figure, the radial extrusion part 333A is interference-extruded in the in-service pipeline 800 to plug the in-service pipeline 800, thereby realizing passive sealing; a hard layer 333B is arranged on the side of the radial extrusion part 333A away from the extrusion mechanism, that is, on the right side in the figure. It restricts the deformation direction of the radial extrusion part 333A after being interference-extruded, that is, restricts the radial extrusion part 333A from deforming in the direction away from the extrusion mechanism after being interference-extruded, that is, not deforming to the right. Exemplarily, the hard layer is a structural part obtained by mixing and vulcanizing a meridian structure and nitrile rubber. The Shore hardness of the material of the hard layer is greater than the Shore hardness of the material of the radial extrusion part, and the difference is 30-40A, so that the hard layer has a greater ability to resist gap mutation damage than the radial extrusion part. 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 no specific limitation is made in this embodiment.

[0049] Exemplarily, as Figure 2 and Figure 3 As shown in Figure 2 and Figure 3 , an axial extrusion part 333C is arranged on the side of the radial extrusion part 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 part 333C is smaller than the outer diameter of the radial extrusion part 333A, so as to form a creep cavity 333D between the axial extrusion part 333C and the outer side surface of the radial extrusion part 333A. After the axial extrusion part 333C is extruded by the extrusion mechanism 320, it is axially compressed and the outer diameter increases. At this time, the deformation is mainly axial compression deformation and supplemented by radial deformation, and a small part will creep into the creep cavity after being compressed, mainly the part with the increased outer diameter enters the creep cavity 333D.

[0050] Exemplarily, the volume of the creep cavity 333D is greater than the interference amount between the first seal 333 and the in-service pipeline 800.

[0051] Exemplarily, such as Figure 2 and Figure 3 As shown, the side where the outer diameter of the radial extrusion part 333A exceeds the outer diameter of the axial extrusion part 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 usage requirements, and no specific limitation is made in this embodiment. Exemplarily, such as Figure 2 and Figure 3 As shown, a through-hole 333E is provided on the first seal 333 for sleeving the first seal on the cylinder barrel 311 of the setting cylinder.

[0052] In an embodiment of the present disclosure, an in-service pipeline hydraulic disc plugging device realizes interference passive plugging of an in-service pipeline by providing a first seal with a radial extrusion part, a hard layer, an axial extrusion part and a peristaltic cavity. Among them, the radial extrusion part can ensure the interference seal of the first seal on the in-service pipeline, the hard layer can limit the deformation direction of the radial extrusion part, and the axial extrusion part and the peristaltic cavity can ensure that the rubber generates peristalsis and flows into the peristaltic cavity after the first seal is extruded, so as to buffer the over-extrusion damage of the radial and axial extrusion to the first seal, reduce the influence on the extrusion part after being extruded, and thus ensure that the first seal mainly realizes the interference seal and is not affected by the axial extrusion force as much as possible.

[0053] Next, in combination with Figure 1 and Figure 2 , the specific structure of the sealing assembly will be further elaborated.

[0054] Such as Figure 1 and Figure 2 As shown, the sealing assembly 330 further includes a second seal 331 sleeved outside the cylinder barrel 311 of the setting cylinder. The second seal can slide relative to the cylinder barrel of the setting cylinder. Exemplarily, the second seal can be a sealing rubber ring. The outer diameter of the second seal is smaller than the inner diameter of the in-service pipeline. It should be noted that the second seal is made of an elastic material, and those skilled in the art can select the material of the second seal according to actual usage requirements, and no specific limitation is made in this embodiment.

[0055] Such as Figure 1 and Figure 2As shown, the second seal 331 abuts against the extrusion mechanism 320, that is, as shown in the figure, the left side of the second seal 331 abuts against the right side of the extrusion mechanism 320. When the extrusion mechanism 320 moves to the right, the second seal 331 deforms after being extruded by the extrusion mechanism 320, that is, the axial dimension of the seal assembly 330 decreases and the radial dimension increases. 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. After the outer diameter of the second seal increases, this gap is filled, thereby blocking the in-service pipeline 800. When the extrusion mechanism 320 moves to the left, the extrusion mechanism 320 relaxes the extrusion of the second seal 331, and the second seal mechanism 331 recovers its deformation without being extruded, and its outer diameter recovers to unseal the in-service pipeline 800.

[0056] Exemplarily, in this embodiment, the connection length between the adjusting head of the piston rod of the ejector rod cylinder and the piston rod of the ejector rod hydraulic cylinder can be adjusted to adjust the stroke of the piston rod of the ejector rod hydraulic cylinder in the ejector rod hydraulic cylinder, that is, to adjust the working stroke of the piston rod of the ejector rod hydraulic cylinder, so as to realize the control of the stroke 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 on the second seal according to different sealing requirements, and the extrusion deformation amount of the seal assembly is controlled by the oil quantity replacement principle to realize the controllable adjustment of the blocking degree of the second seal.

[0057] As Figure 1 and Figure 2 As shown, the seal assembly 330 further includes a pressure test chamber isolation ring 332 sleeved outside 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.

[0058] Exemplarily, as Figure 1 and Figure 2As shown, the outer diameter of the pressure test chamber isolation ring 332 is smaller than the outer diameters of the first seal 333 and the second seal 331. After the in-service pipeline 800 is blocked, the pressure test chamber isolation ring 332, the first seal 333, the second seal 331 and the in-service pipeline 800 form a sealed pressure test ring chamber. Exemplarily, the pressure test ring chamber is communicated with a pressure detection device to perform seal verification by detecting the pressure in the pressure test ring chamber. Exemplarily, the pressure test ring chamber can be connected to the pressure detection device outside the 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 the pressure detection device according to actual use requirements, such as a pressure gauge or a pressure sensor, which plays a role in seal verification through reading or logical judgment. This embodiment does not make specific limitations.

[0059] Exemplarily, the second seal 331 is an active seal. When oil enters the first oil port A of the setting cylinder, oil enters the first oil chamber, and the hydraulic oil drives the piston to move to the right. The piston rod 312 of the setting cylinder moves to the right and drives the extrusion mechanism 320 to move to the right, thereby extruding the second seal 331. After the second seal 331 is extruded, it deforms. This deformation is mainly that the axial dimension decreases while the radial dimension increases, that is, the outer diameter of the second seal 331 increases, and then the in-service pipeline 800 is blocked. When oil enters the second oil port B of the setting cylinder, oil enters the second oil chamber, and the hydraulic oil drives the piston to move to the left. The piston rod 312 of the setting cylinder moves to the left and drives the extrusion mechanism 320 to move to the left. After the extrusion mechanism moves to the left, the extrusion on the second seal 331 is released, that is, the pressure on the second seal 331 is relieved. Since the second seal 331 is an elastic structure, its deformation recovers after the extrusion is released, that is, the outer diameter recovers, and then the in-service pipeline 800 is unsealed.

[0060] Exemplarily, as Figure 1 and Figure 2 As shown, the seal assembly 330 further includes an anti-overturning assembly 334 sleeved outside the cylinder barrel 311 of the setting 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 cylinder, so as to play a role in restricting the movement direction of the seal assembly and restricting the movement and deformation of the first seal. When the first seal 333 is extruded by the extrusion mechanism 320, the anti-overturning assembly 334 can axially restrain the first seal 333, and the first seal 333 is axially compressed and deformed by the reverse thrust from the anti-overturning assembly 334.

[0061] 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 limited within a specific threshold value.

[0062] Exemplarily, since the outer diameter of the anti-overturning assembly 334 is smaller than the inner diameter of the in-service pipeline 800, there is a gap between the anti-overturning assembly 334 and the inner wall of the in-service pipeline 800. When the radial extrusion part 333A of the first seal is axially extruded by the extrusion mechanism 320, it produces compressive plastic deformation mainly in the radial direction and supplemented by axial deformation. At this time, the gap between the anti-overturning assembly 334 and the inner wall of the in-service pipeline 800 will have an extrusion mutation, and the greater the gap, the greater the destructive effect of the mutation. Therefore, the hard layer 333B can prevent this extrusion mutation, thereby ensuring the reliability of the sealing structure. At the same time, the anti-overturning assembly can limit the overflow deformation amount of the first seal, prevent the first seal from tipping over or being damaged by excessive overflow, and ensure the safety and reliability of pipeline opening plugging and hot work operations.

[0063] Exemplarily, as Figure 1 and Figure 2 shown, the plugging head assembly 300 further includes a steering wheel support 340, and the steering wheel support 340 is connected to the end of the cylinder barrel 311 of the setting cylinder away from the extrusion mechanism, that is, fixedly connected to the right end of the extrusion mechanism shown in the figure, and is used to install the steering wheel.

[0064] In an embodiment of the present disclosure, an in-service pipeline hydraulic disc plugging device realizes active sealing of the in-service pipeline by setting a second seal, that is, the in-service pipeline can be sealed by hydraulically driving the second seal. In addition, a pressure test chamber isolation ring and a pressure test ring chamber are set for seal inspection. Finally, an anti-overturning assembly is set to limit the axial displacement of the first seal to ensure the plugging reliability of the sealing assembly.

[0065] In an embodiment of the present disclosure, an in-service pipeline hydraulic disc plugging device realizes passive sealing through a first seal and active sealing through a second seal. During use, the first seal can be used alone to achieve independent interference sealing, or the first seal and the second seal can be used simultaneously to achieve double sealing. During the seal inspection test, the first seal can also be used alone to achieve independent interference sealing and then the test can be carried out, or the first seal and the second seal can be used simultaneously to achieve double sealing and then the test can be carried out.

[0066] Next, in combination with Figure 1 and Figure 2 , the specific structure of the plugging device will be further elaborated.

[0067] Exemplarily, as Figure 1 and Figure 2As shown, one end of the rotating arm 400 is connected to the main bracket 100 through a shaft hole, and the other end is rigidly connected to the cylinder barrel 311 of the setting cylinder. The rotating arm can be driven to rotate around the rotating shaft on the main bracket, so as to drive the plugging head assembly to rotate to the setting position inside the in-service pipeline 800, that is, to make the setting cylinder 310, the extrusion mechanism 320 and the sealing assembly 330 all rotate to the setting position inside the in-service pipeline 800, so that the sealing assembly can realize the plugging of the in-service pipeline.

[0068] Exemplarily, there are three connection modes for the upper-level power source of the setting cylinder, which can adopt in-pipe hydraulic power, in-pipe mechanical power source or out-of-pipe hydraulic station power source. Exemplarily, as Figure 1 with Figure 2 As shown, the plugging device further includes an oil pipe cylinder 900, a plugging tee assembly 1000, a gate valve 1100 and a plugging adapter 1200. The oil pipe cylinder 900 is used to provide hydraulic oil for the plugging device. The functions of the provided hydraulic oil include driving the rotating arm, driving the ejector rod cylinder, serving as the upper-level power source of the setting cylinder and serving as a standby 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 the fluid in the vertical direction in the figure. The plugging adapter is used for the fixed connection of the plugging device.

[0069] In an embodiment of the present disclosure, an in-service pipeline hydraulic disc plugging device realizes the direct fixed installation of the plugging device and the in-service pipeline by setting an oil pipe cylinder, a plugging tee assembly, a gate valve and a plugging adapter, improving the stability, reliability and safety of the installation.

[0070] Next, in combination with Figures 4 to 9 , the specific structure of the cleaning device of the plugging device will be further elaborated.

[0071] Exemplarily, as Figure 4 and Figure 5 As shown, for an in-service pipeline hydraulic disc plugging device, an in-service opening installation hole is provided on the pipeline wall of the in-service pipeline, and the plugging device includes: A plugging head assembly 300, which is movably inserted into the in-service pipeline through the in-service opening installation hole; A cleaning brush assembly 1300, which includes a plurality of brush bundle assemblies 1310, a brush holder 1320 and a transition frame 1330. The plurality of brush bundle assemblies 1310 are connected to the brush holder 1320, the brush holder 1320 is connected to the transition frame 1330, and the transition frame 1330 is connected to the plugging head assembly 300.

[0072] Exemplarily, when the plugging head assembly is movably inserted into the in-service pipeline, the cleaning brush assembly mounted on the plugging head assembly moves along with the movement of the plugging head assembly, thereby cleaning the iron filings in the in-service pipeline. Specifically, multiple brush bundle components in the cleaning brush assembly move along with the plugging head to clean the iron filings in the in-service pipeline.

[0073] In an embodiment of the present disclosure, a hydraulic disc plugging device for in-service pipelines modularizes the cleaning brush into three modules: a brush bundle component, a brush holder, and a transition holder. When problems such as brush wire bunching deformation or brush wire breakage occur in the cleaning brush, the problematic brush bundle component can be replaced individually. Meanwhile, during the replacement operation, the transition holder can be detached from the plugging head for replacement, or the brush holder can be detached from the transition holder for replacement, thereby improving the flexibility of the replacement operation.

[0074] Exemplarily, as Figure 6 shown, the brush bundle component 1310 includes a bundle tube 1311 and multiple brush wires 1312, and one ends of the multiple brush wires are aligned and fixed by the bundle tube. Exemplarily, as Figure 5 and Figure 6 shown, the lengths of the brush wires in each brush bundle component are the same, and the lengths of the brush wires of multiple brush bundle components are also the same. Optionally, those skilled in the art can also design different brush bundle components to have different brush wire lengths according to actual usage situations. For example, the length of the brush wires in the brush bundle component at the middle position is less than the length of the brush wires in the brush bundle components at the two side positions, so that the cleaning brush composed of the brush bundle components can effectively clean the iron filings for in-service pipelines with different shapes. No specific limitation is made in this embodiment.

[0075] Exemplarily, the brush wire is a steel brush wire. Those skilled in the art can also select brush wires of other materials according to actual usage situations. No specific limitation is made in this embodiment.

[0076] Exemplarily, during the preparation process, the brush wires are bundled and inserted into the bundle tube and aligned with the end face of the bundle tube. After alignment, the bundle tube is contracted to press the brush wires, thereby completing the preparation of the brush bundle component.

[0077] In an embodiment of the present disclosure, a hydraulic disc plugging device for in-service pipelines uses the design of the bundle tube and the brush wires to modularize the brush wire component. Since multiple brush wires are fixed into a bundle by the bundle tube, during the cleaning operation, the brush wires are not prone to problems such as bunching deformation or breakage, thereby improving the service life of the brush wires. In addition, this design makes the cleaning brush not prone to entraining the iron filings from the opening, thus avoiding the problem that the entrained iron filings from the opening fall into the gate valve spool structure and affect the sealing and opening / closing of the gate valve.

[0078] Exemplarily, as Figure 7 andFigure 8 As shown, a plurality of in-service opening mounting holes 1321 for brush bundle components are provided on the brush holder 1320, and the bundle tubes 1311 of the brush bundle components can be inserted into the in-service opening mounting holes 1321 for brush bundle components. Exemplarily, those skilled in the art can arrange the plurality of in-service opening mounting holes for brush bundle components according to actual usage requirements. For example, they can be arranged in a straight line, or arranged in multiple straight lines to form an array. No specific limitation is made in this embodiment.

[0079] Exemplarily, during the preparation process, the end face of the bundle tube is inserted into the in-service opening mounting hole for the brush bundle component, and argon arc welding is used between the inserted end faces of the plurality of bundle tubes. After welding, the entire inner arc surface is ground flat to form an inner arc surface structure as Figure 8 shown.

[0080] Exemplarily, as Figures 7 to 9 shown, a plurality of in-service opening mounting holes 1322 for transition holders are provided on the brush holder 1320, and in-service opening mounting holes 1331 corresponding to the in-service opening mounting holes 1322 for transition holders are provided on the transition holder 1330, so as to mechanically connect the brush holder 1320 and the transition holder 1330 through fasteners passing through the in-service opening mounting holes for the transition holder and the in-service opening mounting holes. Exemplarily, the fastener can be a bolt.

[0081] Exemplarily, as Figure 7 and Figure 8 shown, the brush holder 1320 adopts a long strip arc-shaped structure with an "L" cross-section. As Figure 7 shown, that is, the cross-section of the brush holder along the C-C' direction is L-shaped.

[0082] Exemplarily, as Figure 7 and Figure 8 shown, the plurality of in-service opening mounting holes 1321 for brush bundle components are provided at one end of the brush holder 1320 and arranged in a straight line, and the plurality of in-service opening mounting holes 1322 for transition holders are provided at the other end of the brush holder on the same plane as the in-service opening mounting holes for brush bundle components and arranged in a straight line. As can be seen from Figure 7 and Figure 8 , since the brush holder adopts a structure with an L-shaped cross-section, the in-service opening mounting holes for brush bundle components are provided at the thicker end of the inner arc surface of the brush holder, while the in-service opening mounting holes for transition holders are provided at the thinner end of 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 there be a certain distance between the installation positions of the brush bundle components and the installation positions of the transition holders, thus reducing the installation difficulty.

[0083] Exemplarily, as Figure 8 and 9As shown, the outer side 1333 of the transition frame 1330 is an arc corresponding to the inner side of the brush frame 1320, so that the transition frame 1330 and the brush frame 1320 can be matched and connected. Exemplarily, the transition frame and the brush frame can be connected by inserting bolts into the in-service opening mounting holes of the transition frame on the brush frame and the in-service opening mounting holes of the transition frame, so that the outer arc surface of the transition frame and the inner arc surface of the brush frame are closely fitted and installed.

[0084] Exemplarily, as Figure 8 and 9 As shown, a connecting groove 1334 is provided on the inner side of the transition frame 1330, and a plug head in-service opening mounting hole 1332 is provided on the side of the connecting groove 1334. A connecting hole (not shown in the figure) corresponding to the plug head in-service opening mounting hole 1332 is provided on the plug head assembly, so as to mechanically connect the transition frame and the plug head assembly through fasteners inserted through the plug head in-service opening mounting hole and the connecting hole. Exemplarily, as Figure 5 shown, the fastener can be a bolt 1335.

[0085] Exemplarily, as Figure 9 shown, those skilled in the art can set the specific structure and quantity of the connecting groove according to the actual use situation. The connecting groove corresponds to the structure of the plug head assembly, and no specific limitation is made in this embodiment.

[0086] In an in-service pipeline hydraulic disc plugging device according to an embodiment of the present disclosure, by designing the specific structures of the brush frame and the mounting frame, the brush bundle assembly can be flexibly installed on the brush frame, and then installed on the plug head assembly through the transition frame. The modular design provides installation flexibility.

[0087] Exemplarily, as Figure 2 and Figure 4 shown, the plug head assembly 300 includes a steering wheel support member 340, and a plurality of the cleaning brush assemblies 1300 are installed on the steering wheel support member 340. Exemplarily, a connecting hole (not shown in the figure) corresponding to the plug head in-service opening mounting hole 1332 is provided on the steering wheel support member 340, so as to connect the transition frame and the steering support member by inserting bolts, so as to install the cleaning brush assembly on the plug head assembly. Exemplarily, those skilled in the art can set the quantity and installation position of the cleaning brush assembly according to the actual use situation, and no specific limitation is made in this embodiment.

[0088] In an in-service pipeline hydraulic disc plugging device according to an embodiment of the present disclosure, by providing a plurality of cleaning brush assemblies on the steering wheel support member, multiple cleaning of iron filings is realized, so as to improve the safety and accuracy of pipeline maintenance and repair operations.

[0089] The present embodiment also provides a method for preparing a hydraulic disc plugging device for an in-service pipeline, including: Align one end of multiple brush filaments and fix them with a bunch tube to obtain a brush bundle assembly; Insert multiple brush bundle assemblies into the in-service opening mounting holes for the brush bundle assemblies in the arc-shaped brush holder respectively, and fix the brush bundle assemblies by argon arc welding. After welding, grind the surface flat, that is, grind the inner arc surface of the brush holder; Install and connect the brush holder and the transition frame. Exemplarily, mechanical connection is achieved by inserting bolts into the in-service opening mounting holes on the brush holder for the transition frame and the corresponding in-service opening mounting holes on the transition frame; Install and connect the transition frame and the plugging head assembly. Exemplarily, mechanical connection is achieved by inserting bolts into the in-service opening mounting holes for the plugging head on the transition frame and the connection holes on the plugging head assembly.

[0090] The method for preparing a hydraulic disc plugging device for an in-service pipeline according to the embodiment of the present disclosure realizes modular installation of the cleaning brush assembly onto the plugging head assembly. The cleaning brush is modularized and decomposed into three modules: the brush bundle assembly, the brush holder, and the transition frame. When problems such as brush filament bunching deformation or brush filament breakage occur in the cleaning brush, the problematic brush bundle assembly can be replaced separately. At the same time, during the replacement operation, the transition frame can be disassembled from the plugging head for replacement, or the brush holder can be disassembled from the transition frame for replacement, thereby improving the flexibility of the replacement operation.

[0091] Unless otherwise specifically stated, the technical terms or scientific terms used in the present disclosure should have the ordinary meanings understood by those of ordinary skill in the field to which the present disclosure belongs. The "including" or "comprising" used in the present disclosure neither limits the mentioned shapes, numbers, steps, actions, operations, components, elements, and / or their groups, nor excludes the occurrence or addition of one or more other different shapes, numbers, steps, actions, operations, components, elements, and / or their groups, or the addition of these. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity and order of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless otherwise specifically and clearly defined.

[0092] In some descriptions of the invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "coupled" or "fixed" do not refer to physical or mechanical connections, but may include electrical connections, whether direct or indirect through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. Also, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to represent the relative positional relationship. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0093] In the present disclosure, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0094] It should also be understood that when a layer is referred to as being "on" another layer or substrate, it may be directly on the other layer or substrate, or there may be intervening layers; 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 may be directly on the other element, directly connected or coupled to the other element, or there may be one or more intervening elements. In contrast, when an element is referred to as being "directly on" another element or layer, "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. For technologies, methods, and devices known to those of ordinary skill in the relevant art, they may not be discussed in detail, but where appropriate, the technologies, methods, and devices shown should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific other example may have different values. It should be noted that: similar symbols and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0095] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0096] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

1. A hydraulic disc plugging device for in-service pipelines, characterized in that, The pipe wall of the in-service pipeline is provided with in-service opening installation holes, and the plugging device includes: A main bracket, the first end of which is movably inserted into the in-service pipeline through the in-service opening installation hole; A plugging head assembly, which includes a setting hydraulic cylinder, an extrusion mechanism and a sealing assembly; the cylinder body of the setting hydraulic cylinder is arranged in the in-service pipeline, the extrusion mechanism is connected to the piston rod of the setting hydraulic cylinder, and the sealing assembly is arranged 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 extrude or relax the sealing assembly to plug or unseal the in-service pipeline; The sealing assembly includes a first sealing member sleeved outside the cylinder barrel of the setting hydraulic cylinder, and the outer diameter of the radial extrusion part of the first sealing member is larger than the inner diameter of the in-service pipeline, and it is press-fitted with interference in the in-service pipeline to plug the in-service pipeline; a hard layer is arranged on the side of the radial extrusion part facing away from the extrusion mechanism to limit the deformation direction of the radial extrusion part after being press-fitted with interference.

2. The in-service pipeline hydraulic disc plugging device according to claim 1, characterized in that, The hard layer adopts a meridian structure and is vulcanized and formed with nitrile rubber.

3. The hydraulic disc plugging device for in-service pipelines according to claim 1, wherein An axial extrusion part is arranged on the side of the radial extrusion part of the first sealing member close to the extrusion mechanism, and the inner rubber of the pipeline of the axial extrusion part is smaller than the inner diameter of the pipeline; After being extruded by the extrusion mechanism, the axial extrusion part is axially compressed and the outer diameter increases, and the increased part of the outer diameter enters the peristaltic cavity.

4. The in-service pipeline hydraulic disc plugging device according to claim 3, characterized in that, The volume of the peristaltic cavity is larger than the interference amount between the first sealing member and the in-service pipeline.

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

6. A hydraulic disc plugging device for in-service pipelines according to any one of claims 1 to 5, characterized in that, The sealing assembly further includes a second sealing member sleeved outside the cylinder barrel of the setting hydraulic cylinder; The second sealing member abuts against the extrusion mechanism, and after being extruded by the extrusion mechanism, it generates a radial deformation and the outer diameter increases to plug the in-service pipeline.

7. The hydraulic disc plugging device for in-service pipelines according to claim 6, characterized in that, The sealing assembly further includes a pressure test cavity isolation ring sleeved outside the cylinder barrel of the setting hydraulic cylinder, and the pressure test cavity isolation ring abuts against the first sealing member and the second sealing member respectively; The outer diameter of the pressure test cavity isolation ring is smaller than the outer diameters of the first sealing member and the second sealing member. After the in-service pipeline is plugged, the pressure test cavity isolation ring, the first sealing member, the second sealing member and the in-service pipeline form a closed pressure test ring cavity.

8. The hydraulic disc plugging device for in-service pipelines according to claim 7, characterized in that, The pressure test ring cavity is communicated with a pressure detection device to perform seal verification detection by detecting the pressure in the pressure test ring cavity.

9. The in-service pipeline hydraulic disc plugging device according to claim 8, characterized in that, The sealing assembly further includes an anti-overturning assembly sleeved outside 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.

10. A hydraulic disc plugging device for in-service pipelines according to claim 9, characterized in that, The plugging head assembly further includes a steering wheel support member, which is connected to the end of the cylinder barrel of the setting hydraulic cylinder away from the extrusion mechanism and is used for installing a steering wheel.

Images