CN116025799A - Hydraulic plugging device and sealing method thereof - Google Patents

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, wherein the hydraulic plugging head is rotationally connected to the plugging head mounting seat, one end, far away from a plugging oil cylinder, of a plugging oil cylinder piston rod of a plugging oil cylinder is fixedly connected with the plugging head mounting seat, and the plugging oil cylinder piston rod can drive the plugging head mounting seat to move upwards or downwards under the hydraulic action; 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 extruded and deformed under the action of the hydraulic power assembly to seal the pipeline. By utilizing the hydraulic plugging device, the rubber sealing ring of the hydraulic plugging head can deform under extrusion to seal a pipeline, so that the occurrence of poor sealing is avoided, and meanwhile, the hydraulic plugging head realizes automatic sealing operation through hydraulic control.

Description

Hydraulic sealing device and sealing method thereof

technical field

The invention relates to the technical field of pipeline construction, in particular to a hydraulic sealing device and a sealing method thereof.

Background technique

The non-stop under pressure plugging of in-service pipelines is a special technology for maintenance and emergency repair.

Most of the plugging heads in the prior art adopt interference-sealed rubber sealing cups, and the outer diameter of the plugging head is larger than the inner diameter of the pipe to be plugged. During the process of the plugging head entering the blocked pipeline, the plugging head enters the blocked pipeline rigidly, which may easily cause damage to the rubber sealing cup, resulting in a loose seal. Simultaneously, since the internal diameter of the rubber sealing cup is fixed relative to the sealing interference of the blocked pipeline, when the blocked pipeline is deformed or the inner wall is seriously corroded, it will also cause the phenomenon of lax sealing. The phenomenon of lax sealing not only reduces the sealing effect of the plugging, but also sometimes leads to the failure of the plugging operation, and even brings safety hazards to the plugging construction operation.

In addition, the sealing operation of the existing plugging head is manually operated, and the work intensity of the on-site staff is high and the safety is poor.

Contents of the invention

Aiming at the above-mentioned problems in the prior art, the present application proposes a hydraulic sealing device and its sealing method. The rubber sealing ring of the hydraulic sealing head can be deformed under extrusion to seal the pipeline and avoid the occurrence of poor sealing. At the same time, the hydraulic sealing head realizes automatic sealing operation through hydraulic control, which reduces the work intensity of on-site staff and improves the level of safe operation.

In a first aspect, the present invention provides a hydraulic sealing device, the hydraulic sealing device includes a sealing head mounting seat and a hydraulic sealing head, the hydraulic sealing head is rotatably connected to the sealing head mounting seat, The plugging head installation seat and the hydraulic plugging head are installed in the plugging header, and the plugging oil cylinder is installed on the top of the plugging header, and the plugging cylinder piston rod of the plugging oil cylinder is far away from the plugging head. One end of the plugging cylinder is fixedly connected with the plugging head mounting seat, and the piston rod of the plugging oil cylinder can drive the plugging head mounting seat to move up or down under hydraulic pressure; the hydraulic plugging head is provided with a rubber seal ring; the hydraulic sealing device also includes a hydraulic power assembly, and the rubber sealing ring can be squeezed and deformed under the action of the hydraulic power assembly to seal the pipeline. With this hydraulic sealing device, the rubber sealing ring of the hydraulic sealing head can be deformed under extrusion to seal the pipeline to avoid the occurrence of poor sealing. At the same time, the hydraulic sealing head realizes automatic sealing operation through hydraulic control, reducing the The work intensity of the on-site staff has been improved and the level of safe operation has been improved.

In an embodiment of the first aspect, the hydraulic power assembly includes: a pressure bearing body for supporting the rubber sealing ring; the rubber sealing ring is sleeved on the stepped surface of the pressure bearing body; an extruding body , for extruding the rubber sealing ring; the extruding body can extrude or release the rubber sealing ring; and, a hydraulic power unit for driving the extruding body to extrude or release the rubber sealing ring . Through this embodiment, it is beneficial to realize that the extruding body squeezes or releases the rubber sealing ring, so as to seal the pipeline or unseal the pipeline.

In an embodiment of the first aspect, the hydraulic power assembly further includes: a plugging head piston rod, the pressure bearing body is fixed on the plugging head piston rod; a plugging head piston, and the plugging head The piston is fixed on the piston rod of the plugging head through a limit assembly; and a cylinder liner, the cylinder liner can move along the piston rod of the plugging head relative to the piston rod of the plugging head under the action of the hydraulic power unit. When the rod moves axially, the extruding body is fixedly connected with the cylinder sleeve. Through this embodiment, the moving direction of the extruding body is controlled by the cylinder liner, so that the extruding body squeezes or releases the rubber sealing ring, so as to seal the pipeline or release the sealing of the pipeline.

In an embodiment of the first aspect, the hydraulic power unit includes a reversing valve, and a first reversing valve oil port and a second reversing valve oil port are oppositely arranged on the reversing valve; the plugging head A first oil inlet and a second oil inlet are arranged on the opposite sides of the piston rod; the first oil inlet of the reversing valve and the first oil inlet are communicated through the first rubber tube, and the oil of the second reversing valve The first oil inlet communicates with the second oil inlet through the second rubber tube; the first oil inlet communicates with the end of the piston away from the extrusion body through the first oil passage; the second oil inlet communicates with the piston near the One end of the extrusion body communicates with the second oil passage. Through this embodiment, the moving direction of the extruding body can be controlled by controlling the reversing valve, so as to seal or unseal the pipeline.

In an embodiment of the first aspect, the limiting assembly includes: a piston retaining ring, which is located in a piston retaining ring groove on the piston rod of the plugging head; the piston retaining ring is used to block the plugging The head piston moves axially along the plugging head piston rod; the retaining ring sleeve is used to fix the piston retaining ring; and the snap ring is located in the snap ring groove on the plugging head piston rod; the snap ring The spring is used to block the axial movement of the retaining ring sleeve along the piston rod of the plugging head. Through this embodiment, it is beneficial to realize the stillness of the plugging head piston during the whole process.

In an embodiment of the first aspect, an O-ring sealing ring is provided between the plugging head piston rod and the plugging head piston. Through this embodiment, it is beneficial to avoid leakage of hydraulic oil.

In an embodiment of the first aspect, a gray ring is arranged between the plugging head piston and the cylinder liner, and guide strips are arranged on both sides of the gray ring. Through this embodiment, it is beneficial to avoid leakage of hydraulic oil, and it is also beneficial for the cylinder liner to move smoothly relative to the piston of the plugging head.

In an embodiment of the first aspect, a Yx-shaped sealing ring is provided between the cylinder liner and the pressure bearing body, and guide belts are provided on both sides of the Yx-shaped sealing ring; A Yx-shaped sealing ring and a guide belt are arranged between the piston rods of the plugging head; an O-shaped sealing ring is arranged between the cylinder liner and the extrusion body. Through this embodiment, it is beneficial to avoid the leakage of hydraulic oil, and it is also beneficial to the smooth movement of the cylinder liner.

In an embodiment of the first aspect, the first oil passage includes a piston rod radial oil passage, a piston rod axial oil passage, a communicating oil passage, and a piston radial oil passage connected in sequence; wherein, the piston rod The end of the axial oil passage near the extruding body is provided with a plug, and the communicating oil passage is parallel to the radial oil passage of the piston rod; and, the second oil passage includes the radial oil passage of the piston rod and the piston rod communicating with each other. Rod axial oil passage. Through this embodiment, it is beneficial for the hydraulic oil to smoothly enter the end of the piston away from the extruding body or the end close to the extruding body from the first oil inlet or the second oil inlet, so as to drive the extruding body to move.

In an embodiment of the first aspect, the hydraulic sealing device further includes a first rubber hose fixing seat assembly and a second rubber hose fixing seat assembly, respectively fixing the first rubber hose and the second rubber hose on the sealing head mounting seat. Both sides; the first rubber hose fixing seat assembly and the second rubber hose fixing seat assembly both include: a rubber hose fixing seat, the bottom surface of which is attached to the surface of the sealing head mounting seat; the top surface of the rubber hose fixing seat A first rubber hose groove is opened; a rubber hose pressing plate has a second rubber hose groove on its bottom surface, and the cavity formed by the first rubber hose groove and the second rubber hose groove is used to accommodate the first rubber hose or The second rubber hose; and, a screw, which passes through the rubber hose pressing plate and is threadedly matched with the rubber hose fixing seat and the plugging head mounting seat, so as to connect the rubber hose pressing plate and the rubber hose fixing seat It is fixed on the mounting seat of the sealing head. Through this embodiment, it is beneficial to fix the first rubber hose and the second rubber hose, preventing them from falling off from both sides of the sealing head installation seat.

In an embodiment of the first aspect, the hydraulic plugging head is connected to the plugging head installation seat through a plugging head swing shaft, and one end of the plugging head swing shaft is provided with a retaining ring and a cotter pin. Through this embodiment, the cotter pin can prevent the retaining ring from falling off, which is beneficial to fix the swing axis of the plugging head.

In an embodiment of the first aspect, the front end of the hydraulic plugging head is provided with a guide wheel, and the guide wheel is connected with the hydraulic plugging head through a wheel shaft. Through this embodiment, the guide wheel plays a guiding role, and can play a supporting and guiding role during the rotation of the hydraulic sealing head.

In an embodiment of the first aspect, the sealing side of the sealing head installation seat is provided with an arc plate seat, and the arc plate seat is fixed on the sealing head installation seat by bolts, and the arc plate seat The outer side wall can fit the inner wall of the plugging header to provide support for the plugging head installation seat. Through this embodiment, when the hydraulic sealing head moves toward the guide wheel side under the pressure of the fluid in the pipeline, the arc plate seat can provide support for the sealing head installation seat, so that the force of the hydraulic sealing device is balanced.

In an embodiment of the first aspect, the hydraulic blocking device further includes a signal generator for controlling the hydraulic power unit. Through this embodiment, the signal generator can operate the reversing valve, which facilitates the realization of fully automatic operation to automatically control the moving direction of the extruding body.

In the second aspect, the present invention also provides a sealing method using the hydraulic sealing device described in the first aspect and any embodiment thereof, the sealing method includes the following steps: the hydraulic sealing head enters the pipeline by rotating, And the axial direction of the hydraulic plugging head is parallel to the axial direction of the pipeline; the hydraulic power assembly squeezes the rubber sealing ring, and the rubber sealing ring is squeezed and deformed to fit closely with the inner wall of the pipeline, thereby sealing the pipeline . Using this sealing method, the rubber sealing ring of the hydraulic plugging head can be deformed under extrusion to seal the pipeline, avoiding the occurrence of poor sealing. The work intensity of personnel has been improved and the level of safe operation has been improved.

In an embodiment of the second aspect, the hydraulic plugging head enters the pipeline by rotating, including the following steps: the guide wheel on the hydraulic plugging head is in contact with the pipeline wall, the guide wheel moves and guides, and the hydraulic plugging head winds and seals. The plug swing shaft rotates until the axial direction of the hydraulic plugging head is parallel to the axial direction of the pipeline. Through this embodiment, the guide wheel plays a guiding role, and can play a supporting and guiding role during the rotation of the hydraulic sealing head.

In an embodiment of the second aspect, the hydraulic power assembly pressing the rubber sealing ring includes the following steps: the signal generator operates the reversing valve, the hydraulic oil enters the end of the piston away from the extrusion body through the first rubber tube, and Under the action of oil pressure, the cylinder liner is pushed to move away from the extruding body, and the extruding body presses the rubber sealing ring along with the movement of the cylinder liner. Through this embodiment, the signal generator controls the reversing valve, so that the extruding body can extrude the rubber sealing ring with the movement of the cylinder liner, so as to realize the sealing of the pipeline.

In an embodiment of the second aspect, after the plugging operation is completed, the signal generator operates the reversing valve, and the hydraulic oil enters the end of the piston close to the extruding body through the second rubber pipe, and pushes the cylinder liner towards the extruding body under the action of oil pressure Move, the extrusion body moves with the cylinder liner to release the rubber sealing ring, so that the rubber sealing ring returns to its original size, so as to release the pipe seal. Through this embodiment, the signal generator controls the reversing valve, so that the extrusion body moves with the cylinder liner to release the rubber sealing ring, so as to release the sealing of the pipeline.

Compared with the prior art, the hydraulic sealing device and its sealing method provided by the present application have the following beneficial effects.

1. Using the hydraulic sealing device, the rubber sealing ring of the hydraulic sealing head can be deformed under extrusion to seal the pipeline to avoid the occurrence of poor sealing. At the same time, the hydraulic sealing head realizes automatic sealing operation through hydraulic control, The work intensity of on-site staff is reduced and the level of safe operation is improved.

2. Control the moving direction of the extrusion body through the cylinder liner, so that the extrusion body squeezes or releases the rubber sealing ring to seal the pipeline or release the seal of the pipeline.

3. The reversing valve can be controlled by the signal generator to control the moving direction of the extrusion body, so as to automatically seal the pipeline or release the seal of the pipeline.

The above 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.

Description of drawings

Hereinafter, the present invention will be described in more detail based on the embodiments and with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic structural view of a hydraulic sealing device according to an embodiment of the present invention;

Figure 2 shows a schematic cross-sectional view along the A-A direction in Figure 1;

Figure 3 shows a schematic cross-sectional view along the B-B direction in Figure 1;

Figure 4 shows a schematic cross-sectional view along the C-C direction in Figure 1;

FIG. 5 shows a schematic cross-sectional view along the D-D direction in FIG. 1 .

List of reference signs:

1-hydraulic plugging head; 2-pipeline; 4-plugging head installation seat; 5-bolt; 6-plugging cylinder piston rod; 7-plugging cylinder; 8-screw; 9-blocking header; 13- Circlip; 14-retaining ring sleeve; 15-piston retaining ring; 16-O-ring; 17-cylinder liner; 18-guide belt; 19-plugging head piston; 20-Yx-shaped sealing ring; Piston rod; 23-first rubber hose; 24-cotter pin; 25-swing shaft of plugging head; 26-retaining ring; 27-second rubber hose; 28-pressure bearing body; 31-rubber sealing ring; ;34-extrusion body; 35-guide wheel; 36-wheel shaft; 37-plug; 42-hydraulic power unit; 43-reversing valve; 45-arc plate seat; 48-hose pressing plate; 49-hose fixing Seat; 50-the first oil inlet; 51-the second oil inlet.

In the figures, the same parts are given the same reference numerals. The drawings are not to scale.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

This embodiment provides a hydraulic plugging device, the hydraulic plugging device includes a plugging head mounting seat 4 and a hydraulic plugging head 1, the hydraulic plugging head 1 is rotatably connected to the plugging head mounting seat 4, and the plugging head The mounting seat 4 and the hydraulic plugging head 1 are installed in the plugging header 9, the plugging oil cylinder 7 is installed on the top of the plugging header 9, and the end of the plugging oil cylinder piston rod 6 of the plugging oil cylinder 7 is far away from the plugging oil cylinder 7. The plugging head mounting seat 4 is fixedly connected, and the plugging cylinder piston rod 6 can drive the plugging head mounting seat 4 to move up or down under hydraulic pressure; the hydraulic plugging head 1 is provided with a rubber sealing ring 31; the hydraulic plugging device It also includes a hydraulic power assembly, and the rubber sealing ring 31 can be squeezed and deformed under the action of the hydraulic power assembly to seal the pipeline 2 .

As shown in Figure 1, when sealing the pipeline 2, firstly, the plugging head mounting seat 4 moves down with the plugging oil cylinder piston rod 6, and the end of the plugging oil cylinder piston rod 6 far away from the plugging oil cylinder 7 and the plugging head mounting seat 4 Fasten the connection with bolts 5. The hydraulic plugging head 1 is first in contact with the pipe 2 , and through rotation, the hydraulic plugging head 1 enters the pipe 2 , and the axial direction of the hydraulic plugging head 1 is parallel to the axial direction of the pipe 2 .

Next, the hydraulic power assembly extrudes the rubber sealing ring 31 , and the rubber sealing ring 31 is deformed by extrusion to fit closely with the inner wall of the pipeline 2 , thereby sealing the pipeline 2 .

After the plugging operation is completed, the hydraulic power assembly releases the rubber sealing ring 31, so that the rubber sealing ring 31 returns to its original size, so as to release the sealing of the pipeline 2.

Then, the plugging head installation seat 4 moves back up to the initial position along with the plugging oil cylinder piston rod 6 .

The rubber sealing ring 31 of the hydraulic plugging head 1 can be deformed under extrusion to seal the pipeline 2 and avoid the occurrence of poor sealing.

Specifically, the size of the rubber sealing ring 31 of the hydraulic plugging head 1 is smaller than the inner diameter of the pipeline 2, therefore, when the hydraulic plugging head 1 enters the pipeline 2, there will be no collisions and scratches, and damage to the rubber sealing ring 31 can be avoided. . At the same time, since the deformation of the rubber sealing ring 31 is controllable, when the pipe 2 is deformed or the inner wall is severely corroded, the deformation of the rubber sealing ring 31 can be increased by continuing to squeeze, so as to avoid the occurrence of lax sealing.

At the same time, the hydraulic sealing head 1 realizes automatic sealing operation through hydraulic control, which reduces the work intensity of on-site staff and improves the safety operation level.

Specifically, the upward or downward movement of the hydraulic plugging head 1 and the extrusion or release of the rubber sealing ring 31 by the hydraulic power assembly all use hydraulic pressure as the power source to realize automatic sealing operations, reduce the work intensity of on-site staff and improve safety. homework level.

With the hydraulic sealing device, the rubber sealing ring 31 of the hydraulic sealing head 1 can be deformed under extrusion to seal the pipeline 2 to avoid the occurrence of poor sealing. At the same time, the hydraulic sealing head 1 realizes automatic sealing through hydraulic control operation, reducing the work intensity of on-site staff and improving the level of safe operation.

In one embodiment, the hydraulic power assembly includes: a pressure bearing body 28 for supporting a rubber sealing ring 31; the rubber sealing ring 31 is sleeved on the stepped surface of the pressure bearing body 28; The sealing ring 31 ; the extruding body 34 can extrude or release the rubber sealing ring 31 ; and the hydraulic power unit 42 is used to drive the extruding body 34 to extrude or release the rubber sealing ring 31 .

As shown in Figure 2, the pressure-bearing body 28 is used to support the rubber sealing ring 31; the rubber sealing ring 31 is sleeved on the step surface of the pressure-bearing body 28, and during the extrusion process, the pressure-bearing body 28 remains stationary, and the extrusion The body 34 moves toward the pressure receiving body 28, so that the rubber sealing ring 31 is squeezed and deformed. As shown in FIG. 2 , the section of the rubber sealing ring 31 is trapezoidal, and the hypotenuse of the trapezoid is beneficial to increase the stress-bearing area of the rubber sealing ring 31 . The cross section of the rubber sealing ring 31 can also be in other shapes such as rectangle.

The hydraulic power unit 42 provides power for the extruding body 34 to extrude or release the rubber sealing ring 31 .

Through this embodiment, it is beneficial to realize that the extruding body 34 extrudes or releases the rubber sealing ring 31 to seal the pipeline 2 or unseal the pipeline 2 .

In one embodiment, the hydraulic power assembly also includes: the plugging head piston rod 22, the pressure bearing body 28 is fixed on the plugging head piston rod 22; the plugging head piston 19, the plugging head piston 19 is fixed on the On the plugging head piston rod 22; And, the cylinder liner 17, the cylinder liner 17 can move axially along the plugging head piston rod 22 relative to the plugging head piston rod 22 under the effect of the hydraulic power unit 42, the extruding body 34 and Cylinder liner 17 is fixedly connected.

As shown in FIG. 3 , the pressure bearing body 28 is fixed on the plugging head piston rod 22 by a screw 8 , so that the pressure bearing body 28 can keep still when the rubber sealing ring 31 is squeezed or released. The plugging head piston 19 is fixed on the plugging head piston rod 22 through a limit assembly, so that when the rubber sealing ring 31 is squeezed or released, the plugging head piston 19 can keep still.

The cylinder liner 17 and the extruding body 34 are fixed together by the screw 8 , and the hydraulic oil pushes the cylinder liner 17 to move, thereby driving the extruding body 34 to move, so that the extruding body 34 squeezes or releases the rubber sealing ring 31 .

Through this embodiment, the moving direction of the extruding body 34 is controlled by the cylinder sleeve 17 , so that the extruding body 34 squeezes or releases the rubber sealing ring 31 to seal the pipeline 2 or unseal the pipeline 2 .

In one embodiment, the hydraulic power unit 42 includes a reversing valve 43, and the first reversing valve 43 oil port and the second reversing valve 43 oil port are oppositely arranged on the reversing valve 43; The side is provided with a first oil inlet 50 and a second oil inlet 51; the oil port of the first reversing valve 43 communicates with the first oil inlet 50 through the first rubber hose 23, and the oil port of the second reversing valve 43 communicates with the second The oil inlet 51 communicates with the second rubber tube 27; the first oil inlet 50 communicates with the end of the piston away from the extrusion body 34 through the first oil passage; the second oil inlet 51 communicates with the end of the piston close to the extrusion body 34 through the first oil passage. The two oil passages are connected.

When the oil port of the first reversing valve 43 of the reversing valve 43 is connected to oil, the hydraulic oil enters the first rubber hose 23 through the oil port of the first reversing valve 43, enters the first oil inlet 50 along the first rubber hose 23, and then enters the piston. The end away from the extruding body 34 is used to push the cylinder liner 17 to move away from the extruding body 34 , so that the extruding body 34 presses the rubber sealing ring 31 to seal the pipe 2 .

When the oil port of the second reversing valve 43 of the reversing valve 43 is connected to oil, the hydraulic oil enters the second rubber hose 27 through the oil port of the second reversing valve 43, enters the second oil inlet 51 along the second rubber hose 27, and then enters the piston. One end close to the extruding body 34 is used to push the cylinder liner 17 to move towards the extruding body 34 so that the extruding body 34 releases the rubber sealing ring 31 to release the sealing of the pipeline 2 .

Through this embodiment, the moving direction of the extruding body 34 can be controlled by controlling the reversing valve 43 , so as to seal the pipe 2 or release the seal of the pipe 2 .

In one embodiment, the limit assembly includes: a piston retaining ring 15, which is located in the groove of the piston retaining ring 15 on the piston rod 22 of the plugging head; The axial movement of the rod 22; the retaining ring sleeve 14, which is used to fix the piston retaining ring 15; and the retaining ring 13, which is located in the retaining ring 13 groove on the plugging head piston rod 22; the retaining ring 13 is used to block the retaining ring sleeve 14 moves along the axial direction of the plugging head piston rod 22.

Through this embodiment, it is beneficial to realize the stillness of the plugging head piston 19 during the whole process.

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

Through this embodiment, it is beneficial to avoid leakage of hydraulic oil.

In one embodiment, a gray ring 32 is arranged between the plugging head piston 19 and the cylinder liner 17 , and guide belts 18 are arranged on both sides of the gray ring 32 .

The gray ring 32 is composed of a rubber O-ring and a polytetrafluoroethylene ring, and realizes the sealing of the plugging head piston 19 .

The guide strip 18 reduces the friction between the relatively moving plugging head piston 19 and cylinder liner 17 .

Through this embodiment, it is beneficial to avoid leakage of hydraulic oil, and it is also beneficial for the cylinder liner 17 to move relatively to the plugging head piston 19 smoothly.

In one embodiment, a Yx-shaped sealing ring 20 is provided between the cylinder liner 17 and the pressure bearing body 28, and guide belts 18 are provided on both sides of the Yx-shaped sealing ring 20; A Yx-shaped sealing ring 20 and a guide belt 18 are provided; an O-shaped sealing ring 16 is provided between the cylinder liner 17 and the extrusion body 34 .

The Yx-shaped sealing ring 20 is suitable for sealing during reciprocating motion.

Through this embodiment, it is beneficial to avoid leakage of hydraulic oil, and it is also beneficial to the smooth movement of the cylinder liner 17 .

In one embodiment, as shown in FIG. 2 , the first oil passage includes piston rod radial oil passages, piston rod axial oil passages, communicating oil passages and piston radial oil passages connected in sequence; wherein, the piston rod axial A screw plug 37 is provided at the end of the oil channel close to the extruding body 34, and the connected oil channel is parallel to the radial oil channel of the piston rod; and, the second oil channel includes a radial oil channel of the piston rod and an axial oil channel of the piston rod which communicate with each other.

Through this embodiment, it is beneficial for the hydraulic oil to smoothly enter the end of the piston away from the extruding body 34 or the end close to the extruding body 34 from the first oil inlet 50 or the second oil inlet 51 to drive the extruding body 34 to move.

In one embodiment, the hydraulic sealing device further includes a first rubber hose 23 fixing seat assembly and a second rubber hose 27 fixing seat assembly, which respectively fix the first rubber hose 23 and the second rubber hose 27 on the two sides of the sealing head installation seat 4. side; as shown in Figure 5, both the first rubber hose 23 fixing seat assembly and the second rubber hose 27 fixing seat assembly include: a rubber hose fixing seat 49, the bottom surface of which is bonded to the surface of the sealing head mounting seat 4; the rubber hose fixing seat 49 The first rubber hose 23 groove is opened on the top surface; the rubber hose pressing plate 48 is provided with the second rubber hose 27 groove on its bottom surface, and the cavity formed by the first rubber hose 23 groove and the second rubber hose 27 groove is used to accommodate the first rubber hose 23 or the second rubber hose 27; and, the screw 8, which passes through the rubber hose clamping plate 48 and the rubber hose fixing seat 49 and the plugging head mounting seat 4 are threaded, so that the rubber hose clamping plate 48 and the rubber hose fixing seat 49 are fixed on the seal On the plug mounting seat 4.

Through this embodiment, it is beneficial to fix the first rubber tube 23 and the second rubber tube 27 to prevent them from falling off from both sides of the sealing head installation seat 4 .

In one embodiment, the hydraulic plugging head 1 is connected to the plugging head installation seat 4 through 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 .

As shown in FIG. 2 , the cotter pin 24 can prevent the retaining ring 26 from falling off, which is beneficial to fix the swing shaft 25 of the plugging head.

In one embodiment, as shown in FIG. 2 , a guide wheel 35 is provided at the front end of the hydraulic sealing head 1 , and the guiding wheel 35 is connected to the hydraulic sealing head 1 through a wheel shaft 36 .

Through this embodiment, the guide wheel 35 plays a guiding role, and can play a supporting and guiding role during the rotation of the hydraulic sealing head 1 .

In one embodiment, as shown in FIG. 4 , an arc plate seat 45 is arranged on the sealing side of the plugging head mounting seat 4 , and the arc plate seat 45 is fixed on the plugging head mounting seat 4 by bolts 5 . The outer wall can fit the inner wall of the plugging header 9 to provide support for the plugging head installation seat 4 .

Through this embodiment, when the hydraulic plugging head 1 is moved toward the guide wheel 35 by the pressure of the fluid in the pipeline 2, the arc plate seat 45 can provide support for the plugging head mounting seat 4, so that the force of the hydraulic plugging device is balanced .

In one embodiment, the hydraulic blocking device further includes a signal generator for controlling the hydraulic power unit 42 .

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

Through this embodiment, the signal generator can operate the reversing valve 43 , which is beneficial to realize a fully automatic operation to automatically control the moving direction of the extruding body 34 .

This embodiment also provides a sealing method using the above-mentioned hydraulic sealing device, the sealing method includes the following steps: the hydraulic sealing head 1 enters the pipeline 2 through rotation, and the axial direction of the hydraulic sealing head 1 is parallel to the pipeline 2 The axial direction; the hydraulic power assembly extrudes the rubber sealing ring 31 , and the rubber sealing ring 31 is deformed by extrusion to fit closely with the inner wall of the pipeline 2 , thereby sealing the pipeline 2 .

Using this sealing method, the rubber sealing ring 31 of the hydraulic plugging head 1 can be deformed under extrusion to seal the pipeline 2 to avoid the occurrence of poor sealing. At the same time, the hydraulic plugging head 1 realizes automatic sealing operation through hydraulic control, The work intensity of on-site staff is reduced and the level of safe operation is improved.

In one embodiment, the hydraulic plugging head 1 enters the pipeline 2 by rotating and includes the following steps: the guide wheel 35 on the hydraulic plugging head 1 is in contact with the wall of the pipeline 2, the guide wheel 35 moves and guides, and the hydraulic plugging head 1 circles the plugging The head swing shaft 25 rotates until the axial direction of the hydraulic sealing head 1 is parallel to the axial direction of the pipeline 2 .

Through this embodiment, the guide wheel 35 plays a guiding role, and can play a supporting and guiding role during the rotation of the hydraulic sealing head 1 .

In one embodiment, the hydraulic power assembly extruding the rubber sealing ring 31 includes the following steps: the signal generator operates the reversing valve 43, the hydraulic oil enters the end of the piston away from the extruding body 34 through the first rubber pipe 23, and under the action of oil pressure The cylinder liner 17 is pushed to move away from the extruding body 34 , and the extruding body 34 moves along with the cylinder liner 17 to squeeze the rubber sealing ring 31 .

Through this embodiment, the signal generator controls the reversing valve 43 , so that the extruding body 34 moves with the cylinder sleeve 17 to squeeze the rubber sealing ring 31 , so as to realize the sealing of the pipeline 2 .

In one embodiment, after the plugging operation is completed, the signal generator operates the reversing valve 43, the hydraulic oil enters the end of the piston close to the extruding body 34 through the second rubber pipe 27, and pushes the cylinder liner 17 towards the extruding body under the action of oil pressure 34 moves, and the extrusion body 34 moves with the cylinder liner 17 to release the rubber sealing ring 31, so that the rubber sealing ring 31 returns to its original size, so as to release the sealing of the pipe 2.

Through this embodiment, the signal generator controls the reversing valve 43 so that the extrusion body 34 moves with the cylinder sleeve 17 to release the rubber sealing ring 31 to release the seal of the pipe 2 .

Embodiment one

This embodiment provides a hydraulic sealing device, the hydraulic sealing device comprises a sealing head mounting seat 4 and a hydraulic sealing head 1, the hydraulic sealing head 1 is rotatably connected to the sealing head mounting seat 4, and the sealing head The mounting seat 4 and the hydraulic plugging head 1 are installed in the plugging header 9, the plugging oil cylinder 7 is installed on the top of the plugging header 9, and the end of the plugging oil cylinder piston rod 6 of the plugging oil cylinder 7 is far away from the plugging oil cylinder 7. The plugging head mounting seat 4 is fixedly connected, and the plugging cylinder piston rod 6 can drive the plugging head mounting seat 4 to move up or down under hydraulic pressure; the hydraulic plugging head 1 is provided with a rubber sealing ring 31; the hydraulic plugging device It also includes a hydraulic power assembly, and the rubber sealing ring 31 can be squeezed and deformed under the action of the hydraulic power assembly to seal the pipeline 2 .

As shown in Figure 1, when sealing the pipeline 2, firstly, the plugging head mounting seat 4 moves down with the plugging oil cylinder piston rod 6, and the end of the plugging oil cylinder piston rod 6 far away from the plugging oil cylinder 7 and the plugging head mounting seat 4 Fasten the connection with bolts 5. The hydraulic plugging head 1 is first in contact with the pipe 2 , and through rotation, the hydraulic plugging head 1 enters the pipe 2 , and the axial direction of the hydraulic plugging head 1 is parallel to the axial direction of the pipe 2 .

Next, the hydraulic power assembly extrudes the rubber sealing ring 31 , and the rubber sealing ring 31 is deformed by extrusion to fit closely with the inner wall of the pipeline 2 , thereby sealing the pipeline 2 .

After the plugging operation is completed, the hydraulic power assembly releases the rubber sealing ring 31, so that the rubber sealing ring 31 returns to its original size, so as to release the sealing of the pipeline 2.

Then, the plugging head installation seat 4 moves back up to the initial position along with the plugging oil cylinder piston rod 6 .

The rubber sealing ring 31 of the hydraulic plugging head 1 can be deformed under extrusion to seal the pipeline 2 and avoid the occurrence of poor sealing.

Specifically, the size of the rubber sealing ring 31 of the hydraulic plugging head 1 is smaller than the inner diameter of the pipeline 2, therefore, when the hydraulic plugging head 1 enters the pipeline 2, there will be no collisions and scratches, and damage to the rubber sealing ring 31 can be avoided. . At the same time, since the deformation of the rubber sealing ring 31 is controllable, when the pipe 2 is deformed or the inner wall is severely corroded, the deformation of the rubber sealing ring 31 can be increased by continuing to squeeze, so as to avoid the occurrence of lax sealing.

At the same time, the hydraulic sealing head 1 realizes automatic sealing operation through hydraulic control, which reduces the work intensity of on-site staff and improves the safety operation level.

Specifically, the upward or downward movement of the hydraulic plugging head 1 and the extrusion or release of the rubber sealing ring 31 by the hydraulic power assembly all use hydraulic pressure as the power source to realize automatic sealing operations, reduce the work intensity of on-site staff and improve safety. homework level.

With the hydraulic sealing device, the rubber sealing ring 31 of the hydraulic sealing head 1 can be deformed under extrusion to seal the pipeline 2 to avoid the occurrence of poor sealing. At the same time, the hydraulic sealing head 1 realizes automatic sealing through hydraulic control operation, reducing the work intensity of on-site staff and improving the level of safe operation.

Embodiment two

In one embodiment, the hydraulic power unit 42 includes a reversing valve 43, the first reversing valve 43 oil port and the second reversing valve 43 oil port are oppositely arranged on the reversing valve 43; The side is provided with a first oil inlet 50 and a second oil inlet 51; the oil port of the first reversing valve 43 communicates with the first oil inlet 50 through the first rubber hose 23, and the oil port of the second reversing valve 43 communicates with the second The oil inlet 51 communicates with the second rubber tube 27; the first oil inlet 50 communicates with the end of the piston away from the extrusion body 34 through the first oil passage; the second oil inlet 51 communicates with the end of the piston close to the extrusion body 34 through the first oil passage. The two oil passages are connected.

When the oil port of the first reversing valve 43 of the reversing valve 43 is connected to oil, the hydraulic oil enters the first rubber hose 23 through the oil port of the first reversing valve 43, enters the first oil inlet 50 along the first rubber hose 23, and then enters the piston. The end away from the extruding body 34 is used to push the cylinder liner 17 to move away from the extruding body 34 , so that the extruding body 34 presses the rubber sealing ring 31 to seal the pipe 2 .

When the oil port of the second reversing valve 43 of the reversing valve 43 is connected to oil, the hydraulic oil enters the second rubber hose 27 through the oil port of the second reversing valve 43, enters the second oil inlet 51 along the second rubber hose 27, and then enters the piston. One end close to the extruding body 34 is used to push the cylinder liner 17 to move towards the extruding body 34 so that the extruding body 34 releases the rubber sealing ring 31 to release the sealing of the pipeline 2 .

Through this embodiment, the moving direction of the extruding body 34 can be controlled by controlling the reversing valve 43 , so as to seal the pipe 2 or release the seal of the pipe 2 .

The hydraulic blocking device also includes a signal generator for controlling the hydraulic power unit 42 .

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

The signal generator can operate the reversing valve 43 , which is beneficial to realize fully automatic operation, so as to automatically control the moving direction of the extruding body 34 .

Embodiment three

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 sheathed on the stepped surface of the pressure bearing body 28; The sealing ring 31 ; the extruding body 34 can extrude or release the rubber sealing ring 31 ; and the hydraulic power unit 42 is used to drive the extruding body 34 to extrude or release the rubber sealing ring 31 .

As shown in Figure 2, the pressure-bearing body 28 is used to support the rubber sealing ring 31; the rubber sealing ring 31 is sleeved on the step surface of the pressure-bearing body 28, and during the extrusion process, the pressure-bearing body 28 remains stationary, and the extrusion The body 34 moves toward the pressure receiving body 28, so that the rubber sealing ring 31 is squeezed and deformed. As shown in FIG. 2 , the section of the rubber sealing ring 31 is trapezoidal, and the hypotenuse of the trapezoid is beneficial to increase the stress-bearing area of the rubber sealing ring 31 . The cross section of the rubber sealing ring 31 can also be in other shapes such as rectangle.

The hydraulic power unit 42 provides power for the extruding body 34 to extrude or release the rubber sealing ring 31 .

The hydraulic power assembly also includes: the plugging head piston rod 22, the pressure bearing body 28 is fixed on the plugging head piston rod 22; the plugging head piston 19, the plugging head piston 19 is fixed on the plugging head piston rod 22 through the limit assembly and, the cylinder liner 17 , the cylinder liner 17 can move relative to the plugging head piston rod 22 along the axial direction of the plugging head piston rod 22 under the action of the hydraulic power unit 42 , and the extruding body 34 is fixedly connected with the cylinder liner 17 .

As shown in FIG. 3 , the pressure bearing body 28 is fixed on the plugging head piston rod 22 by a screw 8 , so that the pressure bearing body 28 can keep still when the rubber sealing ring 31 is squeezed or released. The plugging head piston 19 is fixed on the plugging head piston rod 22 through a limit assembly, so that when the rubber sealing ring 31 is squeezed or released, the plugging head piston 19 can keep still.

The cylinder liner 17 and the extruding body 34 are fixed together by the screw 8 , and the hydraulic oil pushes the cylinder liner 17 to move, thereby driving the extruding body 34 to move, so that the extruding body 34 squeezes or releases the rubber sealing ring 31 .

Through this embodiment, the cylinder sleeve 17 is used to control the moving direction of the extruding body 34 , so that the extruding body 34 squeezes or releases the rubber sealing ring 31 to seal the pipeline 2 or unseal the pipeline 2 .

In describing the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", " The orientation or positional relationship indicated by "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, so as to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the invention.

Although the invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It is therefore to be understood that numerous modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the invention as defined by the appended claims. It shall be understood that different dependent claims and features described herein may be combined in a different way than that described in the original claims. It will also be appreciated that features described in connection with individual embodiments can be used in other described embodiments.

Claims (18)

1. The hydraulic plugging device is characterized by comprising a plugging head mounting seat and a hydraulic plugging head, wherein the hydraulic plugging head is rotationally connected to the plugging head mounting seat, the plugging head mounting seat and the hydraulic plugging head are arranged in a plugging header, a plugging oil cylinder is arranged at the top of the plugging header, one end, far away from the plugging oil cylinder, of a plugging oil cylinder piston rod of the plugging oil cylinder is fixedly connected with the plugging head mounting seat, and the plugging oil cylinder piston rod can drive the plugging head mounting seat to move upwards or downwards under the hydraulic action;

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 extruded and deformed under the action of the hydraulic power assembly to seal the pipeline.

2. The hydraulic plugging device of claim 1, wherein the hydraulic power assembly comprises:

the pressure-bearing body is used for supporting the rubber sealing ring; the rubber sealing ring is sleeved on the step surface of the pressure-bearing body;

the extrusion body is used for extruding the rubber sealing ring; the extrusion body can extrude or release the rubber sealing ring; the method comprises the steps of,

and the hydraulic power unit is used for driving the extrusion body to extrude or release the rubber sealing ring.

3. The hydraulic plugging device of claim 2, wherein the hydraulic power assembly further comprises:

the pressure-bearing body is fixed on the plugging head piston rod;

the plugging head piston is fixed on the plugging head piston rod through a limiting assembly; the method comprises the steps of,

the cylinder sleeve can move along the axial direction of the plugging head piston rod relative to the plugging head piston rod under the action of the hydraulic power unit, and the extrusion body is fixedly connected with the cylinder sleeve.

4. The hydraulic plugging device according to claim 2, wherein the hydraulic power unit comprises a reversing valve, and a first reversing valve oil port and a second reversing valve oil port are oppositely arranged on the reversing valve; the two opposite sides of the piston rod of the plugging head are provided with a first oil inlet and a second oil inlet; the first reversing valve oil port is communicated with the first oil inlet through a first rubber pipe, and the second reversing valve oil port is communicated with the second oil inlet through a second rubber pipe; the first oil inlet is communicated with one end of the piston, which is far away from the extrusion body, through a first oil duct; and the second oil inlet is communicated with one end of the piston, which is close to the extrusion body, through a second oil duct.

5. The hydraulic plugging device of claim 3 wherein the limit assembly comprises:

the piston check ring is positioned in a piston check ring groove on the piston rod of the plugging head; the piston check ring is used for blocking the axial movement of the plugging head piston along the piston rod of the plugging head;

the retaining ring sleeve is used for fixing the piston retaining ring; the method comprises the steps of,

the clamping spring is positioned in a clamping spring groove on the piston rod of the plugging head; the clamp spring is used for blocking the retainer ring sleeve from moving along the axial direction of the piston rod of the plugging head.

6. A hydraulic plugging device according to claim 3 wherein an O-ring is provided between the plug piston rod and the plug piston.

7. A hydraulic plugging device according to claim 3, wherein a gurley ring is arranged between the plugging head piston and the cylinder sleeve, and guide belts are arranged on two sides of the gurley ring.

8. The hydraulic plugging device according to claim 3, wherein a Yx-shaped sealing ring is arranged between the cylinder sleeve and the pressure-bearing body, and guide belts are arranged on two sides of the Yx-shaped sealing ring;

a Yx-shaped sealing ring and a guide belt are arranged between the cylinder sleeve and the piston rod of the plugging head;

an O-shaped sealing ring is arranged between the cylinder sleeve and the extrusion body.

9. The hydraulic plugging device of claim 4, wherein the first oil passage comprises a piston rod radial oil passage, a piston rod axial oil passage, a communication oil passage, and a piston radial oil passage that are sequentially communicated; the piston rod is provided with a piston rod radial oil passage, wherein a plug is arranged at one end of the piston rod axial oil passage, which is close to the extrusion body, and the communication oil passage is parallel to the piston rod radial oil passage; and, in addition, the method comprises the steps of,

the second oil passage comprises a piston rod radial oil passage and a piston rod axial oil passage which are communicated with each other.

10. The hydraulic plugging device of claim 4, further comprising a first hose mount assembly and a second hose mount assembly, respectively securing the first hose and the second hose on both sides of the plugging head mount;

the first rubber tube fixing base assembly and the second rubber tube fixing base assembly all comprise:

the bottom surface of the rubber tube fixing seat is attached to the surface of the plugging head mounting seat; a first rubber tube groove is formed in the top surface of the rubber tube fixing seat;

the rubber tube compacting plate is provided with a second rubber tube groove on the bottom surface, and a cavity formed by encircling the first rubber tube groove and the second rubber tube groove is used for accommodating the first rubber tube or the second rubber tube; the method comprises the steps of,

the screw penetrates through the rubber pipe pressing plate to be in threaded fit with the rubber pipe fixing seat and the plugging head mounting seat, so that the rubber pipe pressing plate and the rubber pipe fixing seat are fixed on the plugging head mounting seat.

11. The hydraulic plugging device according to claim 1, wherein the hydraulic plugging head is connected with the plugging head mounting seat through a plugging head swinging shaft, and one end of the plugging head swinging shaft is provided with a retainer ring and a cotter pin.

12. The hydraulic plugging device according to claim 1, wherein a guide wheel is arranged at the front end of the hydraulic plugging head, and the guide wheel is connected with the hydraulic plugging head through a wheel shaft.

13. The hydraulic plugging device of claim 1, wherein the sealing side of the plugging head mounting seat is provided with an arc plate seat, the arc plate seat is fixed on the plugging head mounting seat through bolts, and the outer side wall of the arc plate seat can be attached to the inner wall of the plugging header to provide support for the plugging head mounting seat.

14. The hydraulic plugging device of claim 2, further comprising a signal generator for controlling the hydraulic power unit.

15. A sealing method with a hydraulic plugging device according to any one of claims 1 to 14, wherein the sealing method comprises the steps of:

the hydraulic plugging head enters the pipeline through rotation, and the axial direction of the hydraulic plugging head is parallel to the axial direction of the pipeline;

the hydraulic power assembly extrudes the rubber sealing ring, and the rubber sealing ring is extruded and deformed to be tightly attached to the inner wall of the pipeline, so that the pipeline is sealed.

16. The sealing method of claim 15, wherein the hydraulic block head is rotated into the pipe comprising the steps of:

the guide wheel on the hydraulic plugging head is contacted with the wall of the pipeline,

the guide wheel moves to guide the motion of the guide wheel,

the hydraulic plugging head rotates around the plugging head swinging shaft until the axial direction of the hydraulic plugging head is parallel to the axial direction of the pipeline.

17. The sealing method of claim 15, wherein the hydraulic power assembly compresses the rubber seal ring comprising the steps of:

the signal generator operates the reversing valve, hydraulic oil enters one end of the piston, which is far away from the extrusion body, through the first rubber tube, the cylinder sleeve is pushed to move in the direction far away from the extrusion body under the action of oil pressure, and the extrusion body moves along with the cylinder sleeve to extrude the rubber sealing ring.

18. The sealing method according to claim 15, wherein the plugging operation is ended, the signal generator operates the reversing valve, hydraulic oil enters one end of the piston, which is close to the extrusion body, through the second rubber tube, the cylinder sleeve is pushed to move towards the extrusion body under the action of oil pressure, and the extrusion body moves along with the cylinder sleeve to release the rubber sealing ring, so that the rubber sealing ring is restored to the original size, and the sealing of the pipeline is released.

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