Hydraulic plugging device and sealing method thereof

Abstract

The application provides a hydraulic plugging device and a sealing method thereof. The hydraulic plugging device comprises a plugging head mounting seat and a hydraulic plugging head, the hydraulic plugging head is rotationally connected to the plugging head mounting seat, one end of a plugging cylinder piston rod of a plugging cylinder away from the plugging cylinder is fixedly connected to the plugging head mounting seat, and the plugging cylinder piston rod can drive the plugging head mounting seat to move upward or downward under the action of hydraulic pressure; a rubber sealing ring is arranged on the hydraulic plugging head; the hydraulic plugging device further comprises a hydraulic power assembly, and the rubber sealing ring can be deformed by extrusion under the action of the hydraulic power assembly to seal the pipeline. By using the hydraulic plugging device, the rubber sealing ring of the hydraulic plugging head can be deformed by extrusion to seal the pipeline, so that the occurrence of a sealing failure is avoided, and meanwhile, the hydraulic plugging head realizes automatic sealing operation through hydraulic control.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction technology, and in particular to a hydraulic sealing device and its sealing method. Background Technology

[0002] Non-stop, pressurized plugging of in-service pipelines is a special technique for maintenance and emergency repair.

[0003] Existing sealing heads often employ interference-fit rubber sealing cups, with the outer diameter of the sealing head larger than the inner diameter of the pipe to be sealed. During insertion, the sealing head forces its way into the pipe, easily damaging the rubber sealing cup and leading to a poor seal. Furthermore, since the interference fit between the inner diameter of the rubber sealing cup and the pipe is constant, deformation or severe corrosion of the pipe can also cause a poor seal. Poor sealing not only reduces the sealing effect but can also lead to sealing failure and even pose safety hazards during the sealing process.

[0004] In addition, the existing sealing head sealing operation is done manually, which results in high workload and poor safety for on-site workers. Summary of the Invention

[0005] To address the problems in the prior art, this application proposes a hydraulic sealing device and its sealing method. The rubber sealing ring of the hydraulic sealing head can deform under compression to seal the pipeline, avoiding incomplete sealing. At the same time, the hydraulic sealing head achieves automated sealing operation through hydraulic control, reducing the workload of on-site personnel and improving the level of safe operation.

[0006] In a first aspect, the present invention provides a hydraulic plugging device, comprising a plugging head mounting base and a hydraulic plugging head. The hydraulic plugging head is rotatably connected to the plugging head mounting base. The plugging head mounting base and the hydraulic plugging head are installed in a plugging manifold. A plugging cylinder is installed on the top of the plugging manifold. The end of the piston rod of the plugging cylinder away from the plugging cylinder is fixedly connected to the plugging head mounting base. The piston rod of the plugging cylinder can drive the plugging head mounting base to move up or down under hydraulic action. A rubber sealing ring is provided on the hydraulic plugging head. The hydraulic plugging device also includes a hydraulic power component, and the rubber sealing ring can be deformed by compression under the action of the hydraulic power component to seal the pipeline. Using this hydraulic plugging device, the rubber sealing ring of the hydraulic plugging head can deform under compression to seal the pipeline, avoiding incomplete sealing. Simultaneously, the hydraulic plugging head achieves automated sealing operation through hydraulic control, reducing the workload of on-site personnel and improving the level of safe operation.

[0007] In one embodiment of the first aspect, the hydraulic power assembly includes: a pressure-bearing body for supporting the rubber sealing ring; the rubber sealing ring being fitted onto a stepped surface of the pressure-bearing body; a compression body for compressing the rubber sealing ring; the compression body being capable of compressing or releasing the rubber sealing ring; and a hydraulic power unit for driving the compression body to compress or release the rubber sealing ring. This embodiment facilitates the compression or release of the rubber sealing ring by the compression body to seal or release the seal of a pipeline.

[0008] In one embodiment of the first aspect, the hydraulic power assembly further includes: a sealing head piston rod, the pressure-bearing body being fixed to the sealing head piston rod; a sealing head piston, the sealing head piston being fixed to the sealing head piston rod by a limiting assembly; and a cylinder liner, the cylinder liner being movable axially relative to the sealing head piston rod under the action of the hydraulic power unit, the extrusion body being fixedly connected to the cylinder liner. In this embodiment, the movement direction of the extrusion body is controlled by the cylinder liner, thereby causing the extrusion body to extrude or release the rubber sealing ring to seal or release the pipeline.

[0009] In one embodiment of the first aspect, the hydraulic power unit includes a reversing valve, with a first reversing valve port and a second reversing valve port disposed opposite to each other on the reversing valve; a first oil inlet and a second oil inlet are disposed on opposite sides of the piston rod of the sealing head; the first reversing valve port and the first oil inlet are connected by a first hose, and the second reversing valve port and the second oil inlet are connected by a second hose; the first oil inlet is connected to the end of the piston away from the extrusion body through a first oil passage; the second oil inlet is connected to the end of the piston near the extrusion body through a second oil passage. Through this embodiment, the movement direction of the extrusion body can be controlled by controlling the reversing valve, thereby sealing or releasing the seal of the pipeline.

[0010] In one embodiment of the first aspect, the limiting assembly includes: a piston retaining ring located in a piston retaining ring groove on the piston rod of the plugging head; the piston retaining ring is used to prevent the plugging head piston from moving axially along the piston rod of the plugging head; a retaining ring sleeve for fixing the piston retaining ring; and a retaining spring located in a retaining spring groove on the piston rod of the plugging head; the retaining spring is used to prevent the retaining ring sleeve from moving axially along the piston rod of the plugging head. This embodiment facilitates maintaining the piston of the plugging head stationary throughout the process.

[0011] In one embodiment of the first aspect, an O-ring is provided between the piston rod of the sealing head and the piston of the sealing head. This embodiment helps to prevent hydraulic oil leakage.

[0012] In one embodiment of the first aspect, a Glyd ring is provided between the plugging head piston and the cylinder liner, and guide strips are provided on both sides of the Glyd ring. This embodiment helps to prevent hydraulic oil leakage and also facilitates smooth movement of the cylinder liner relative to the plugging head piston.

[0013] In one embodiment of the first aspect, a Yx-shaped sealing ring is provided between the cylinder liner and the pressure-bearing body, and guide strips are provided on both sides of the Yx-shaped sealing ring; a Yx-shaped sealing ring and guide strips are provided between the cylinder liner and the piston rod of the sealing head; and an O-ring is provided between the cylinder liner and the extrusion body. This embodiment helps to prevent hydraulic oil leakage and also facilitates smooth movement of the cylinder liner.

[0014] In one embodiment of the first aspect, the first oil passage includes a piston rod radial oil passage, a piston rod axial oil passage, a connecting oil passage, and a piston radial oil passage connected in sequence; wherein, a plug is provided at the end of the piston rod axial oil passage near the extrusion body, and the connecting oil passage is parallel to the piston rod radial oil passage; and the second oil passage includes a piston rod radial oil passage and a piston rod axial oil passage connected to each other. This embodiment facilitates the smooth entry of hydraulic oil from the first or second oil inlet into the end of the piston away from or near the extrusion body, thereby driving the extrusion body to move.

[0015] In one embodiment of the first aspect, the hydraulic plugging device further includes a first hose fixing seat assembly and a second hose fixing seat assembly, which respectively fix the first hose and the second hose to both sides of the plugging head mounting seat. Both the first hose fixing seat assembly and the second hose fixing seat assembly include: a hose fixing seat whose bottom surface abuts against the surface of the plugging head mounting seat; a first hose groove formed on the top surface of the hose fixing seat; a hose clamping plate whose bottom surface has a second hose groove, the cavity formed by the first hose groove and the second hose groove being used to accommodate the first hose or the second hose; and a screw that passes through the hose clamping plate and threadedly engages with the hose fixing seat and the plugging head mounting seat, thereby fixing the hose clamping plate and the hose fixing seat to the plugging head mounting seat. This embodiment facilitates the fixing of the first hose and the second hose, preventing them from detaching from both sides of the plugging head mounting seat.

[0016] In one embodiment of the first aspect, the hydraulic plugging head and the plugging head mounting base are connected via a plugging head pivot shaft, one end of which is provided with a retaining ring and a cotter pin. In this embodiment, the cotter pin prevents the retaining ring from falling off, which is beneficial for securing the plugging head pivot shaft.

[0017] In one embodiment of the first aspect, a guide wheel is provided at the front end of the hydraulic sealing head, and the guide wheel is connected to the hydraulic sealing head via an axle. In this embodiment, the guide wheel serves a guiding function, providing support and guidance during the rotation of the hydraulic sealing head.

[0018] In one embodiment of the first aspect, an arc plate seat is provided on the sealing side of the plugging head mounting base. The arc plate seat is fixed to the plugging head mounting base by bolts, and the outer wall of the arc plate seat can fit against the inner wall of the plugging manifold to provide support for the plugging head mounting base. With this embodiment, when the hydraulic plugging head moves towards the guide wheel side under the pressure of the fluid in the pipeline, the arc plate seat can provide support for the plugging head mounting base, thereby balancing the forces on the hydraulic plugging device.

[0019] In one embodiment of the first aspect, the hydraulic sealing device further includes a signal generator for controlling the hydraulic power unit. In this embodiment, the signal generator can operate a reversing valve, thereby facilitating fully automated operation to automatically control the movement direction of the extruder.

[0020] Secondly, the present invention also provides a sealing method using the hydraulic plugging device described in the first aspect and any embodiment thereof. The sealing method includes the following steps: a hydraulic plugging head is rotated into a pipeline, with the axial direction of the hydraulic plugging head parallel to the axial direction of the pipeline; a hydraulic power component compresses the rubber sealing ring, causing the rubber sealing ring to deform under compression and fit tightly against the inner wall of the pipeline, thereby sealing the pipeline. Using this sealing method, the rubber sealing ring of the hydraulic plugging head can deform under compression to seal the pipeline, avoiding incomplete sealing. Simultaneously, the hydraulic plugging head achieves automated sealing operation through hydraulic control, reducing the workload of on-site personnel and improving the level of safe operation.

[0021] In one embodiment of the second aspect, the hydraulic plugging head's insertion into the pipeline by rotation includes the following steps: a guide wheel on the hydraulic plugging head contacts the pipeline wall, the guide wheel moves to guide the movement, and the hydraulic plugging head rotates around its pivot axis until the axial direction of the hydraulic plugging head is parallel to the axial direction of the pipeline. In this embodiment, the guide wheel serves a guiding function, providing support and guidance during the rotation of the hydraulic plugging head.

[0022] In one embodiment of the second aspect, the hydraulic power assembly compressing the rubber sealing ring includes the following steps: a signal generator operates a reversing valve, and hydraulic oil enters the piston away from the extrusion body through a first hose. Under the action of oil pressure, the cylinder liner is pushed to move away from the extrusion body, and the extrusion body moves with the cylinder liner to compress the rubber sealing ring. Through this embodiment, the signal generator controls the reversing valve, thereby enabling the extrusion body to move with the cylinder liner to compress the rubber sealing ring, thus achieving pipeline sealing.

[0023] In one embodiment of the second aspect, after the sealing operation is completed, the signal generator operates the reversing valve, and hydraulic oil enters the piston near the extrusion body through the second rubber hose. Under the action of oil pressure, the cylinder liner is pushed towards the extrusion body. The extrusion body moves with the cylinder liner, releasing the rubber sealing ring, thereby restoring the rubber sealing ring to its initial size and releasing the pipeline seal. Through this embodiment, the signal generator controls the reversing valve, thereby enabling the extrusion body to move with the cylinder liner and release the rubber sealing ring, thus releasing the pipeline seal.

[0024] The hydraulic sealing device and sealing method provided in this application have the following advantages compared with the prior art.

[0025] 1. Using this hydraulic sealing device, the rubber sealing ring of the hydraulic sealing head can deform under compression to seal the pipeline, avoiding the occurrence of poor sealing. At the same time, the hydraulic sealing head realizes automated sealing operation through hydraulic control, which reduces the workload of on-site personnel and improves the level of safe operation.

[0026] 2. The movement direction of the extrusion body is controlled by the cylinder liner, thereby causing the extrusion body to squeeze or release the rubber sealing ring to seal the pipeline or release the pipeline seal.

[0027] 3. The reversing valve controlled by the signal generator can control the movement direction of the extrusion body, thereby automatically sealing or releasing the pipeline seal.

[0028] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved. Attached Figure Description

[0029] The invention will now be described in more detail with reference to embodiments and the accompanying drawings, wherein:

[0030] Figure 1 A schematic diagram of the structure of a hydraulic sealing device according to an embodiment of the present invention is shown;

[0031] Figure 2 Showing Figure 1 A cross-sectional view along the AA direction;

[0032] Figure 3 Showing Figure 1 A cross-sectional view along the BB direction;

[0033] Figure 4 Showing Figure 1 A cross-sectional view along the CC direction;

[0034] Figure 5 Showing Figure 1 A cross-sectional view along the DD direction.

[0035] List of reference numerals in the attached diagram:

[0036] 1-Hydraulic plugging head; 2-Pipeline; 4-Plugging head mounting base; 5-Bolt; 6-Pluging cylinder piston rod; 7-Pluging cylinder; 8-Screw; 9-Pluging manifold; 13-Snap ring; 14-Retaining ring sleeve; 15-Piston retaining ring; 16-O-ring seal; 17-Cylinder liner; 18-Guide belt; 19-Pluging head piston; 20-Yx-shaped sealing ring; 22-Pluging head piston rod; 23-First hose; 24 - Cotter pin; 25-Shutting head pivot; 26-Retaining ring; 27-Second hose; 28-Pressure bearing body; 31-Rubber sealing ring; 32-Glyd ring; 34-Extrusion body; 35-Guide wheel; 36-Wheel axle; 37-Plug; 42-Hydraulic power unit; 43-Reversing valve; 45-Arc plate seat; 48-Hose clamping plate; 49-Hose fixing seat; 50-First oil inlet; 51-Second oil inlet.

[0037] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale. Detailed Implementation

[0038] The invention will now be further described with reference to the accompanying drawings.

[0039] This embodiment provides a hydraulic plugging device, which includes a plugging head mounting base 4 and a hydraulic plugging head 1. The hydraulic plugging head 1 is rotatably connected to the plugging head mounting base 4. The plugging head mounting base 4 and the hydraulic plugging head 1 are installed in a plugging manifold 9. A plugging cylinder 7 is installed on the top of the plugging manifold 9. The end of the plugging cylinder piston rod 6 of the plugging cylinder 7 away from the plugging cylinder 7 is fixedly connected to the plugging head mounting base 4. The plugging cylinder piston rod 6 can drive the plugging head mounting base 4 to move up or down under hydraulic action. A rubber sealing ring 31 is provided on the hydraulic plugging head 1. The hydraulic plugging device also includes a hydraulic power component. The rubber sealing ring 31 can be squeezed and deformed under the action of the hydraulic power component to seal the pipeline 2.

[0040] like Figure 1As shown, when sealing pipe 2, firstly, the plugging head mounting seat 4 moves down with the piston rod 6 of the plugging cylinder. The end of the piston rod 6 away from the plugging cylinder 7 is fixedly connected to the plugging head mounting seat 4 by bolts 5. The hydraulic plugging head 1 first contacts pipe 2. By rotating, the hydraulic plugging head 1 enters pipe 2, and the axial direction of the hydraulic plugging head 1 is parallel to the axial direction of pipe 2.

[0041] Next, the hydraulic power component squeezes the rubber sealing ring 31, and the rubber sealing ring 31 is deformed by the compression to fit tightly against the inner wall of the pipe 2, thereby sealing the pipe 2.

[0042] After the sealing operation is completed, the hydraulic power unit releases the rubber sealing ring 31, thereby restoring the rubber sealing ring 31 to its initial size and releasing the seal on the pipeline 2.

[0043] Then, the sealing head mounting seat 4 moves back to its initial position along with the sealing cylinder piston rod 6.

[0044] The rubber sealing ring 31 of the hydraulic sealing head 1 can deform under compression to seal the pipe 2 and prevent poor sealing.

[0045] Specifically, the size of the rubber sealing ring 31 of the hydraulic sealing head 1 is smaller than the inner diameter of the pipe 2. Therefore, when the hydraulic sealing head 1 enters the pipe 2, there will be no collision or scratch, thus avoiding damage to the rubber sealing ring 31. At the same time, since the deformation of the rubber sealing ring 31 is controllable, when the pipe 2 is deformed or its inner wall is severely corroded, the deformation of the rubber sealing ring 31 can be increased by continued compression, thus preventing the occurrence of poor sealing.

[0046] Meanwhile, the hydraulic sealing head 1 achieves automated sealing operations through hydraulic control, reducing the workload of on-site personnel and improving the level of safe operation.

[0047] Specifically, the upward or downward movement of the hydraulic sealing head 1, and the compression or release of the rubber sealing ring 31 by the hydraulic power component all use hydraulic power as the power source to achieve automated sealing operations, reduce the workload of on-site personnel and improve the level of safe operation.

[0048] Using this hydraulic sealing device, the rubber sealing ring 31 of the hydraulic sealing head 1 can deform under compression to seal the pipe 2, avoiding the occurrence of poor sealing. At the same time, the hydraulic sealing head 1 realizes automated sealing operation through hydraulic control, which reduces the workload of on-site personnel and improves the level of safe operation.

[0049] In one embodiment, the hydraulic power assembly includes: a pressure body 28 for supporting a rubber seal ring 31; the rubber seal ring 31 is fitted onto the stepped surface of the pressure body 28; a compression body 34 for compressing the rubber seal ring 31; the compression body 34 is capable of compressing or releasing the rubber seal ring 31; and a hydraulic power unit 42 for driving the compression body 34 to compress or release the rubber seal ring 31.

[0050] like Figure 2 As shown, the pressure-bearing body 28 supports the rubber sealing ring 31; the rubber sealing ring 31 is fitted onto the stepped surface of the pressure-bearing body 28. During the compression process, the pressure-bearing body 28 remains stationary, while the extrusion body 34 moves toward the pressure-bearing body 28, thereby causing the rubber sealing ring 31 to be deformed by compression. Figure 2 As shown, the cross-section of the rubber sealing ring 31 is trapezoidal, and the hypotenuse of the trapezoid helps to increase the force-bearing area of ​​the rubber sealing ring 31. The cross-section of the rubber sealing ring 31 can also be rectangular or other shapes.

[0051] The hydraulic power unit 42 provides power for the extrusion body 34 to extrude or release the rubber seal ring 31.

[0052] This embodiment facilitates the extrusion body 34 to compress or release the rubber sealing ring 31, thereby sealing the pipe 2 or releasing the seal of the pipe 2.

[0053] In one embodiment, the hydraulic power assembly further includes: a sealing head piston rod 22, with a pressure-bearing body 28 fixed on the sealing head piston rod 22; a sealing head piston 19, which is fixed on the sealing head piston rod 22 by a limiting component; and a cylinder liner 17, which is axially movable relative to the sealing head piston rod 22 under the action of the hydraulic power unit 42, with the extrusion body 34 fixedly connected to the cylinder liner 17.

[0054] like Figure 3 As shown, the pressure-bearing body 28 is fixed to the sealing head piston rod 22 by screws 8, so that the pressure-bearing body 28 can remain stationary when the rubber sealing ring 31 is squeezed or released. The sealing head piston 19 is fixed to the sealing head piston rod 22 by a limiting assembly, so that the sealing head piston 19 can remain stationary when the rubber sealing ring 31 is squeezed or released.

[0055] The cylinder liner 17 and the extrusion body 34 are fixed together by screws 8. Hydraulic oil pushes the cylinder liner 17 to move, thereby driving the extrusion body 34 to move, so that the extrusion body 34 can squeeze or release the rubber sealing ring 31.

[0056] In this embodiment, the movement direction of the extrusion body 34 is controlled by the cylinder liner 17, thereby causing the extrusion body 34 to extrude or release the rubber sealing ring 31 to seal the pipe 2 or release the seal of the pipe 2.

[0057] In one embodiment, the hydraulic power unit 42 includes a reversing valve 43, on which a first reversing valve 43 port and a second reversing valve 43 port are disposed opposite each other; the piston rod 22 of the sealing head is provided with a first oil inlet 50 and a second oil inlet 51 on opposite sides; the first reversing valve 43 port and the first oil inlet 50 are connected by a first hose 23, and the second reversing valve 43 port and the second oil inlet 51 are connected by a second hose 27; the first oil inlet 50 is connected to the end of the piston away from the extrusion body 34 through a first oil passage; the second oil inlet 51 is connected to the end of the piston near the extrusion body 34 through a second oil passage.

[0058] When oil is supplied through the first port of the reversing valve 43, hydraulic oil enters the first hose 23 through the first port of the reversing valve 43, and enters the first inlet port 50 along the first hose 23, thereby entering the end of the piston away from the extrusion body 34, so as to push the cylinder liner 17 to move away from the extrusion body 34, so that the extrusion body 34 squeezes the rubber sealing ring 31, thereby sealing the pipeline 2.

[0059] When oil is supplied through the second port of the reversing valve 43, hydraulic oil enters the second hose 27 through the second port of the reversing valve 43, and then enters the second inlet port 51 along the second hose 27, thereby entering the piston near the end of the extrusion body 34, so as to push the cylinder liner 17 toward the extrusion body 34, so that the extrusion body 34 releases the rubber sealing ring 31, thereby releasing the seal of the pipeline 2.

[0060] In this embodiment, the direction of movement of the extrusion body 34 can be controlled by controlling the reversing valve 43, thereby sealing the pipe 2 or releasing the seal of the pipe 2.

[0061] In one embodiment, the limiting assembly includes: a piston retaining ring 15 located in a piston retaining ring 15 groove on the piston rod 22 of the plugging head; the piston retaining ring 15 is used to prevent the piston 19 of the plugging head from moving axially along the piston rod 22 of the plugging head; a retaining ring sleeve 14 for fixing the piston retaining ring 15; and a retaining ring 13 located in a retaining ring 13 groove on the piston rod 22 of the plugging head; the retaining ring 13 is used to prevent the retaining ring sleeve 14 from moving axially along the piston rod 22 of the plugging head.

[0062] This implementation method facilitates keeping the sealing head piston 19 stationary throughout the entire process.

[0063] In one embodiment, an O-ring 16 is provided between the plugging head piston rod 22 and the plugging head piston 19.

[0064] This implementation method helps to prevent hydraulic oil leakage.

[0065] In one embodiment, a Glyd ring 32 is provided between the sealing head piston 19 and the cylinder liner 17, and guide strips 18 are provided on both sides of the Glyd ring 32.

[0066] The Glyd ring 32, composed of a rubber O-ring and a polytetrafluoroethylene ring, achieves a seal on the piston 19 of the plug head.

[0067] The guide belt 18 reduces the friction between the relatively moving sealing head piston 19 and the cylinder liner 17.

[0068] This implementation method helps to avoid hydraulic oil leakage and also facilitates the smooth movement of the cylinder liner 17 relative to the plug piston 19.

[0069] In one embodiment, a Yx-shaped sealing ring 20 is provided between the cylinder liner 17 and the pressure-bearing body 28, and guide strips 18 are provided on both sides of the Yx-shaped sealing ring 20; a Yx-shaped sealing ring 20 and guide strips 18 are provided between the cylinder liner 17 and the piston rod 22 of the sealing head; and an O-ring sealing ring 16 is provided between the cylinder liner 17 and the extrusion body 34.

[0070] Yx-shaped sealing ring 20 is suitable for sealing during reciprocating motion.

[0071] This implementation method helps to avoid hydraulic oil leakage and also facilitates the smooth movement of cylinder liner 17.

[0072] In one implementation, such as Figure 2 As shown, the first oil passage includes a piston rod radial oil passage, a piston rod axial oil passage, a connecting oil passage, and a piston radial oil passage connected in sequence; wherein, a plug 37 is provided at one end of the piston rod axial oil passage near the extrusion body 34, and the connecting oil passage is parallel to the piston rod radial oil passage; and the second oil passage includes a piston rod radial oil passage and a piston rod axial oil passage connected to each other.

[0073] This implementation method facilitates the smooth entry of hydraulic oil from the first oil inlet 50 or the second oil inlet 51 into the end of the piston away from or near the extrusion body 34, so as to drive the extrusion body 34 to move.

[0074] In one embodiment, the hydraulic sealing device further includes a first hose 23 fixing seat assembly and a second hose 27 fixing seat assembly, which respectively fix the first hose 23 and the second hose 27 to both sides of the sealing head mounting seat 4; Figure 5As shown, both the first hose 23 fixing seat assembly and the second hose 27 fixing seat assembly include: a hose fixing seat 49, the bottom surface of which is in contact with the surface of the sealing head mounting seat 4; a first hose 23 groove is formed on the top surface of the hose fixing seat 49; a hose clamping plate 48, the bottom surface of which is formed with a second hose 27 groove, the cavity formed by the first hose 23 groove and the second hose 27 groove is used to accommodate the first hose 23 or the second hose 27; and a screw 8, which passes through the hose clamping plate 48 and is threadedly engaged with the hose fixing seat 49 and the sealing head mounting seat 4, thereby fixing the hose clamping plate 48 and the hose fixing seat 49 on the sealing head mounting seat 4.

[0075] This implementation method helps to fix the first tubing 23 and the second tubing 27, preventing them from falling off from both sides of the sealing head mounting base 4.

[0076] In one embodiment, the hydraulic plugging head 1 and the plugging head mounting base 4 are connected by a plugging head swing shaft 25, and one end of the plugging head swing shaft 25 is provided with a retaining ring 26 and a cotter pin 24.

[0077] like Figure 2 As shown, the cotter pin 24 can prevent the retaining ring 26 from falling off, which is beneficial for fixing the swivel shaft 25 of the sealing head.

[0078] In one implementation, such as Figure 2 As shown, the front end of the hydraulic sealing head 1 is provided with a guide wheel 35, and the guide wheel 35 is connected to the hydraulic sealing head 1 through a wheel axle 36.

[0079] In this implementation method, the guide wheel 35 plays a guiding role and can provide support and guidance during the rotation of the hydraulic sealing head 1.

[0080] In one implementation, such as Figure 4 As shown, an arc plate seat 45 is provided on the sealing side of the sealing head mounting base 4. The arc plate seat 45 is fixed to the sealing head mounting base 4 by bolts 5. The outer wall of the arc plate seat 45 can fit against the inner wall of the sealing manifold 9 to provide support for the sealing head mounting base 4.

[0081] In this embodiment, when the hydraulic plugging head 1 moves toward the guide wheel 35 under the pressure of the fluid in the pipeline 2, the arc plate seat 45 can provide support for the plugging head mounting seat 4, thereby balancing the forces on the hydraulic plugging device.

[0082] In one embodiment, the hydraulic sealing device further includes a signal generator for controlling the hydraulic power unit 42.

[0083] Preferably, the signal generator is a sub-low frequency signal generator.

[0084] With this implementation, the signal generator can operate the reversing valve 43, thereby facilitating fully automatic operation to automatically control the movement direction of the extrusion body 34.

[0085] This embodiment also provides a sealing method using the above-described hydraulic plugging device. The sealing method includes the following steps: the hydraulic plugging head 1 is rotated into the pipe 2, and the axial direction of the hydraulic plugging head 1 is parallel to the axial direction of the pipe 2; the hydraulic power component squeezes the rubber sealing ring 31, and the rubber sealing ring 31 is deformed by the compression to fit tightly against the inner wall of the pipe 2, thereby sealing the pipe 2.

[0086] Using this sealing method, the rubber sealing ring 31 of the hydraulic sealing head 1 can deform under compression to seal the pipe 2, avoiding the occurrence of poor sealing. At the same time, the hydraulic sealing head 1 realizes automated sealing operation through hydraulic control, which reduces the workload of on-site personnel and improves the level of safe operation.

[0087] In one embodiment, the hydraulic plugging head 1 enters the pipeline 2 by rotation, which includes the following steps: the guide wheel 35 on the hydraulic plugging head 1 contacts the wall of the pipeline 2, the guide wheel 35 moves to guide, and the hydraulic plugging head 1 rotates around the plugging head pivot 25 until the axis of the hydraulic plugging head 1 is parallel to the axis of the pipeline 2.

[0088] In this implementation method, the guide wheel 35 plays a guiding role and can provide support and guidance during the rotation of the hydraulic sealing head 1.

[0089] In one embodiment, the hydraulic power assembly extruding the rubber seal ring 31 includes the following steps: the signal generator operates the reversing valve 43, and hydraulic oil enters the end of the piston away from the extrusion body 34 through the first rubber hose 23. Under the action of oil pressure, the cylinder liner 17 is pushed to move away from the extrusion body 34, and the extrusion body 34 moves with the cylinder liner 17 to extrude the rubber seal ring 31.

[0090] In this embodiment, the signal generator controls the reversing valve 43, thereby enabling the extrusion body 34 to move with the cylinder liner 17 to extrude the rubber sealing ring 31, so as to seal the pipeline 2.

[0091] In one embodiment, after the sealing operation is completed, the signal generator operates the reversing valve 43, and hydraulic oil enters the piston near the end of the extrusion body 34 through the second rubber hose 27. Under the action of oil pressure, the cylinder liner 17 is pushed toward the extrusion body 34. The extrusion body 34 moves with the cylinder liner 17 to release the rubber sealing ring 31, thereby restoring the rubber sealing ring 31 to its initial size and releasing the seal of the pipeline 2.

[0092] In this implementation, the signal generator controls the reversing valve 43, thereby enabling the extrusion body 34 to move with the cylinder liner 17 to release the rubber sealing ring 31, thus releasing the seal of the pipeline 2.

[0093] Example 1

[0094] This embodiment provides a hydraulic plugging device, which includes a plugging head mounting base 4 and a hydraulic plugging head 1. The hydraulic plugging head 1 is rotatably connected to the plugging head mounting base 4. The plugging head mounting base 4 and the hydraulic plugging head 1 are installed in a plugging manifold 9. A plugging cylinder 7 is installed on the top of the plugging manifold 9. The end of the plugging cylinder piston rod 6 of the plugging cylinder 7 away from the plugging cylinder 7 is fixedly connected to the plugging head mounting base 4. The plugging cylinder piston rod 6 can drive the plugging head mounting base 4 to move up or down under hydraulic action. A rubber sealing ring 31 is provided on the hydraulic plugging head 1. The hydraulic plugging device also includes a hydraulic power component. The rubber sealing ring 31 can be squeezed and deformed under the action of the hydraulic power component to seal the pipeline 2.

[0095] like Figure 1 As shown, when sealing pipe 2, firstly, the plugging head mounting seat 4 moves down with the piston rod 6 of the plugging cylinder. The end of the piston rod 6 away from the plugging cylinder 7 is fixedly connected to the plugging head mounting seat 4 by bolts 5. The hydraulic plugging head 1 first contacts pipe 2. By rotating, the hydraulic plugging head 1 enters pipe 2, and the axial direction of the hydraulic plugging head 1 is parallel to the axial direction of pipe 2.

[0096] Next, the hydraulic power component squeezes the rubber sealing ring 31, and the rubber sealing ring 31 is deformed by the compression to fit tightly against the inner wall of the pipe 2, thereby sealing the pipe 2.

[0097] After the sealing operation is completed, the hydraulic power unit releases the rubber sealing ring 31, thereby restoring the rubber sealing ring 31 to its initial size and releasing the seal on the pipeline 2.

[0098] Then, the sealing head mounting seat 4 moves back to its initial position along with the sealing cylinder piston rod 6.

[0099] The rubber sealing ring 31 of the hydraulic sealing head 1 can deform under compression to seal the pipe 2 and prevent poor sealing.

[0100] Specifically, the size of the rubber sealing ring 31 of the hydraulic sealing head 1 is smaller than the inner diameter of the pipe 2. Therefore, when the hydraulic sealing head 1 enters the pipe 2, there will be no collision or scratch, thus avoiding damage to the rubber sealing ring 31. At the same time, since the deformation of the rubber sealing ring 31 is controllable, when the pipe 2 is deformed or its inner wall is severely corroded, the deformation of the rubber sealing ring 31 can be increased by continued compression, thus preventing the occurrence of poor sealing.

[0101] Meanwhile, the hydraulic sealing head 1 achieves automated sealing operations through hydraulic control, reducing the workload of on-site personnel and improving the level of safe operation.

[0102] Specifically, the upward or downward movement of the hydraulic sealing head 1, and the compression or release of the rubber sealing ring 31 by the hydraulic power component all use hydraulic power as the power source to achieve automated sealing operations, reduce the workload of on-site personnel and improve the level of safe operation.

[0103] Using this hydraulic sealing device, the rubber sealing ring 31 of the hydraulic sealing head 1 can deform under compression to seal the pipe 2, avoiding the occurrence of poor sealing. At the same time, the hydraulic sealing head 1 realizes automated sealing operation through hydraulic control, which reduces the workload of on-site personnel and improves the level of safe operation.

[0104] Example 2

[0105] In one embodiment, the hydraulic power unit 42 includes a reversing valve 43, on which a first reversing valve 43 port and a second reversing valve 43 port are disposed opposite each other; the piston rod 22 of the sealing head is provided with a first oil inlet 50 and a second oil inlet 51 on opposite sides; the first reversing valve 43 port and the first oil inlet 50 are connected by a first hose 23, and the second reversing valve 43 port and the second oil inlet 51 are connected by a second hose 27; the first oil inlet 50 is connected to the end of the piston away from the extrusion body 34 through a first oil passage; the second oil inlet 51 is connected to the end of the piston near the extrusion body 34 through a second oil passage.

[0106] When oil is supplied through the first port of the reversing valve 43, hydraulic oil enters the first hose 23 through the first port of the reversing valve 43, and enters the first inlet port 50 along the first hose 23, thereby entering the end of the piston away from the extrusion body 34, so as to push the cylinder liner 17 to move away from the extrusion body 34, so that the extrusion body 34 squeezes the rubber sealing ring 31, thereby sealing the pipeline 2.

[0107] When oil is supplied through the second port of the reversing valve 43, hydraulic oil enters the second hose 27 through the second port of the reversing valve 43, and then enters the second inlet port 51 along the second hose 27, thereby entering the piston near the end of the extrusion body 34, so as to push the cylinder liner 17 toward the extrusion body 34, so that the extrusion body 34 releases the rubber sealing ring 31, thereby releasing the seal of the pipeline 2.

[0108] In this embodiment, the direction of movement of the extrusion body 34 can be controlled by controlling the reversing valve 43, thereby sealing the pipe 2 or releasing the seal of the pipe 2.

[0109] The hydraulic sealing device also includes a signal generator for controlling the hydraulic power unit 42.

[0110] Preferably, the signal generator is a sub-low frequency signal generator.

[0111] The signal generator can operate the reversing valve 43, which facilitates fully automatic operation to automatically control the movement direction of the extrusion body 34.

[0112] Example 3

[0113] In this embodiment, the hydraulic power assembly includes: a pressure-bearing body 28 for supporting the rubber sealing ring 31; the rubber sealing ring 31 is sleeved on the stepped surface of the pressure-bearing body 28; a compression body 34 for compressing the rubber sealing ring 31; the compression body 34 is capable of compressing or releasing the rubber sealing ring 31; and a hydraulic power unit 42 for driving the compression body 34 to compress or release the rubber sealing ring 31.

[0114] like Figure 2 As shown, the pressure-bearing body 28 supports the rubber sealing ring 31; the rubber sealing ring 31 is fitted onto the stepped surface of the pressure-bearing body 28. During the compression process, the pressure-bearing body 28 remains stationary, while the extrusion body 34 moves toward the pressure-bearing body 28, thereby causing the rubber sealing ring 31 to be deformed by compression. Figure 2 As shown, the cross-section of the rubber sealing ring 31 is trapezoidal, and the hypotenuse of the trapezoid helps to increase the force-bearing area of ​​the rubber sealing ring 31. The cross-section of the rubber sealing ring 31 can also be rectangular or other shapes.

[0115] The hydraulic power unit 42 provides power for the extrusion body 34 to extrude or release the rubber seal ring 31.

[0116] The hydraulic power unit also includes: a sealing head piston rod 22, with a pressure-bearing body 28 fixed on the sealing head piston rod 22; a sealing head piston 19, which is fixed on the sealing head piston rod 22 by a limiting component; and a cylinder liner 17, which can move relative to the sealing head piston rod 22 along the axial direction of the sealing head piston rod 22 under the action of the hydraulic power unit 42, with the extrusion body 34 fixedly connected to the cylinder liner 17.

[0117] like Figure 3 As shown, the pressure-bearing body 28 is fixed to the sealing head piston rod 22 by screws 8, so that the pressure-bearing body 28 can remain stationary when the rubber sealing ring 31 is squeezed or released. The sealing head piston 19 is fixed to the sealing head piston rod 22 by a limiting assembly, so that the sealing head piston 19 can remain stationary when the rubber sealing ring 31 is squeezed or released.

[0118] The cylinder liner 17 and the extrusion body 34 are fixed together by screws 8. Hydraulic oil pushes the cylinder liner 17 to move, thereby driving the extrusion body 34 to move, so that the extrusion body 34 can squeeze or release the rubber sealing ring 31.

[0119] In this embodiment, the cylinder liner 17 controls the movement direction of the extrusion body 34, thereby causing the extrusion body 34 to extrude or release the rubber sealing ring 31 to seal the pipe 2 or release the seal of the pipe 2.

[0120] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0121] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A hydraulic sealing device, characterized in that, The device includes a sealing head mounting base and a hydraulic sealing head. The hydraulic sealing head is rotatably connected to the sealing head mounting base. The sealing head mounting base and the hydraulic sealing head are installed in a sealing manifold. A sealing cylinder is installed on the top of the sealing manifold. The end of the sealing cylinder piston rod away from the sealing cylinder is fixedly connected to the sealing head mounting base. The sealing cylinder piston rod can drive the sealing head mounting base to move up or down under hydraulic action. The hydraulic plugging head is provided with a rubber sealing ring; the hydraulic plugging device also includes a hydraulic power component, and the rubber sealing ring can be squeezed and deformed under the action of the hydraulic power component to seal the pipeline. The hydraulic power assembly includes a cylinder liner with a piston chamber, a sealing head piston disposed in the piston chamber, and a sealing head piston rod connected to the sealing head piston; a pressure-bearing body is fixedly disposed on the sealing head piston rod, and an extrusion body is fixedly disposed on the cylinder liner, the extrusion body being used to cooperate with the pressure-bearing body to extrude the rubber sealing ring; The hydraulic power assembly has a leak-proof path connecting the pipe and the piston chamber. The leak-proof path includes, in sequence along its extension direction, a first sliding fit clearance, a second sliding fit clearance, and an isolation chamber located between the second sliding fit clearance and the piston chamber. The pressure-bearing body includes an axial section extending along the axial direction of the cylinder liner. The axial section is coaxially inserted into the extrusion body. The first sliding fit clearance is defined by the outer wall of the axial section and the inner wall of the extrusion body. The rubber sealing ring is sleeved on the axial section and used to seal the inlet of the first sliding fit clearance. The axial section is coaxially sleeved on the outside of the cylinder liner. The second sliding fit clearance is defined by the inner wall of the axial section and the outer wall of the cylinder liner. A Yx-shaped sealing ring is provided on the second sliding fit clearance to block the first sliding fit clearance and the isolation chamber.

2. The hydraulic sealing device according to claim 1, characterized in that, The hydraulic power assembly also includes: A hydraulic power unit is used to drive the extrusion body to extrude or release the rubber sealing ring.

3. The hydraulic sealing device according to claim 2, characterized in that, The plugging head piston is fixed to the plugging head piston rod by a limiting component.

4. The hydraulic sealing device according to claim 2, characterized in that, The hydraulic power unit includes a reversing valve, on which a first reversing valve port and a second reversing valve port are disposed opposite each other; the piston rod of the sealing head is provided with a first oil inlet and a second oil inlet on opposite sides; the first reversing valve port and the first oil inlet are connected by a first hose, and the second reversing valve port and the second oil inlet are connected by a second hose; the first oil inlet is connected to the end of the sealing head piston away from the extrusion body through a first oil passage; the second oil inlet is connected to the end of the sealing head piston near the extrusion body through a second oil passage.

5. The hydraulic sealing device according to claim 3, characterized in that, The limiting component includes: A piston retaining ring is located in a piston retaining ring groove on the piston rod of the plugging head; the piston retaining ring is used to prevent the piston of the plugging head from moving axially along the piston rod of the plugging head. A retaining ring sleeve, used to secure the piston retaining ring; and, A retaining ring is located in a retaining ring groove on the piston rod of the sealing head; the retaining ring is used to prevent the retaining ring from moving axially along the piston rod of the sealing head.

6. The hydraulic sealing device according to claim 3, characterized in that, An O-ring is provided between the piston rod of the sealing head and the piston of the sealing head.

7. The hydraulic sealing device according to claim 3, characterized in that, A Glyd ring is provided between the piston of the sealing head and the cylinder liner, and guide strips are provided on both sides of the Glyd ring.

8. The hydraulic sealing device according to claim 3, characterized in that, The Yx-shaped sealing ring located between the cylinder liner and the pressure-bearing body has guide strips on both sides; A Yx-shaped sealing ring and a guide band are provided between the cylinder liner and the piston rod of the sealing head; An O-ring is provided between the cylinder liner and the extrusion body.

9. The hydraulic sealing device according to claim 4, characterized in that, The first oil passage includes a piston rod radial oil passage, a piston rod axial oil passage, a connecting oil passage, and a piston radial oil passage connected in sequence; wherein, the piston rod axial oil passage is provided with a plug at one end near the extrusion body, and the connecting oil passage is parallel to the piston rod radial oil passage; and... The second oil passage includes a piston rod radial oil passage and a piston rod axial oil passage that are interconnected.

10. The hydraulic sealing device according to claim 4, characterized in that, It also includes a first hose fixing seat assembly and a second hose fixing seat assembly, which respectively fix the first hose and the second hose to both sides of the sealing head mounting seat; Both the first hose retainer assembly and the second hose retainer assembly include: The bottom surface of the hose fixing seat is in contact with the surface of the sealing head mounting seat; the top surface of the hose fixing seat is provided with a first hose groove; A hose clamping plate has a second hose groove on its bottom surface, and the cavity formed by the first hose groove and the second hose groove is used to accommodate the first hose or the second hose; and... A screw passes through the hose clamping plate and engages with the hose fixing seat and the sealing head mounting seat, thereby fixing the hose clamping plate and the hose fixing seat onto the sealing head mounting seat.

11. The hydraulic sealing device according to claim 1, characterized in that, The hydraulic plugging head and the plugging head mounting base are connected by a plugging head swing shaft, and one end of the plugging head swing shaft is provided with a retaining ring and a cotter pin.

12. The hydraulic sealing device according to claim 1, characterized in that, The front end of the hydraulic sealing head is provided with a guide wheel, and the guide wheel is connected to the hydraulic sealing head through an axle.

13. The hydraulic sealing device according to claim 1, characterized in that, The sealing side of the plug head mounting base is provided with an arc plate seat, which is fixed to the plug head mounting base by bolts. The outer wall of the arc plate seat can fit against the inner wall of the plug manifold to provide support for the plug head mounting base.

14. The hydraulic sealing device according to claim 2, characterized in that, It also includes a signal generator for controlling the hydraulic power unit.

15. A sealing method using the hydraulic sealing device according to any one of claims 1 to 14, characterized in that, The sealing method includes the following steps: The hydraulic plug head is inserted into the pipeline by rotation, and the axis of the hydraulic plug head is parallel to the axis of the pipeline. The hydraulic power component compresses the rubber sealing ring, causing the rubber sealing ring to deform under pressure and fit tightly against the inner wall of the pipe, thereby sealing the pipe.

16. The sealing method according to claim 15, characterized in that, The hydraulic plugging head enters the pipeline by rotation, involving the following steps: The guide wheel on the hydraulic plug head contacts the pipe wall. The guide wheel guides the movement. The hydraulic plug head rotates around its pivot axis until the axial direction of the hydraulic plug head is parallel to the axial direction of the pipeline.

17. The sealing method according to claim 15, characterized in that, The hydraulic power assembly compresses the rubber seal ring by the following steps: The signal generator operates the reversing valve, and hydraulic oil enters the end of the sealing head piston away from the extrusion body through the first rubber hose. Under the action of oil pressure, the cylinder liner is pushed to move away from the extrusion body, and the extrusion body moves with the cylinder liner to extrude the rubber sealing ring.

18. The sealing method according to claim 15, characterized in that, After the sealing operation is completed, the signal generator operates the reversing valve, and hydraulic oil enters the piston near the extrusion body through the second rubber hose. Under the action of oil pressure, the cylinder liner is pushed towards the extrusion body. The extrusion body moves with the cylinder liner to release the rubber sealing ring, thereby restoring the rubber sealing ring to its initial size and releasing the pipeline seal.

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