CN216843674U

CN216843674U - Hydraulic plugging device

Info

Publication number: CN216843674U
Application number: CN202122588615.9U
Authority: CN
Inventors: 纪延涛; 郭春荣; 曹勇; 魏科元; 张玉坤; 王袁君; 李晓斌; 李乃胜; 丁铖; 刘洪武
Original assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Oilfield Construction Engineering Co Ltd
Current assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Oilfield Construction Engineering Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-06-28
Anticipated expiration: 2031-10-26

Abstract

The application provides a hydraulic pressure plugging device. The hydraulic plugging device comprises a plugging head mounting seat and a hydraulic plugging head, wherein the hydraulic plugging head is rotatably connected to the plugging head mounting seat, one end, far away from the 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 up or down 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, the occurrence of untight sealing is avoided, and meanwhile, the hydraulic plugging head realizes automatic sealing operation through hydraulic control.

Description

Hydraulic plugging device

Technical Field

The utility model relates to a pipeline construction technical field especially relates to a hydraulic pressure plugging device.

Background

The non-stop conveying pressurized plugging of in-service pipeline is a special technology for maintenance and first-aid repair.

In the prior art, a sealing head mostly adopts an interference sealing rubber sealing leather cup, and the outer diameter of the sealing head is larger than the inner diameter of a pipe to be sealed. In the process that the plugging head enters the blocked pipeline, the plugging head enters the blocked pipeline in a rigid mode, the rubber sealing leather cup is easy to damage, and poor sealing is caused. Meanwhile, because the inner diameter of the rubber sealing leather cup is a fixed value relative to the sealing interference magnitude of the blocked pipeline, when the blocked pipeline deforms or the inner wall is corroded seriously, the phenomenon of untight sealing can also be caused. The phenomenon of untight sealing not only reduces the sealing effect of plugging, sometimes also can lead to the plugging operation to fail, can even bring the potential safety hazard for the plugging construction operation.

In addition, the existing sealing operation of the sealing head adopts manual operation, so that the working intensity of field workers is high, and the safety is poor.

SUMMERY OF THE UTILITY MODEL

To the problem among the above-mentioned prior art, this application has provided a hydraulic pressure plugging device, and this hydraulic pressure plugging head's rubber seal can warp in order to seal the pipeline under the extrusion, avoids sealed not tight emergence, and simultaneously, this hydraulic pressure plugging head passes through hydraulic control and realizes automatic sealed operation, has reduced field work personnel's working strength and has promoted safe operation level.

The utility model provides a hydraulic plugging device, this hydraulic plugging device include shutoff head mount pad and hydraulic pressure shutoff head, hydraulic pressure shutoff head rotate connect in on the shutoff head mount pad, shutoff head mount pad with hydraulic pressure shutoff head installs in the shutoff header, shutoff hydro-cylinder is installed at shutoff header top, the one end of shutoff hydro-cylinder piston rod of shutoff hydro-cylinder keeping away from the shutoff hydro-cylinder is fixedly connected with shutoff head mount pad, shutoff hydro-cylinder piston rod can drive under the hydraulic pressure the shutoff head mount pad shifts up or shifts down; 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 means of the hydraulic plugging device, the rubber sealing ring of the hydraulic plugging head can deform under extrusion to seal a pipeline, the occurrence of untight sealing is avoided, meanwhile, the hydraulic plugging head achieves automatic sealing operation through hydraulic control, the working strength of field workers is reduced, and the safety operation level is improved.

In one embodiment, 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 extruding body is used for extruding the rubber sealing ring; the extrusion body can extrude or release the rubber sealing ring; and the hydraulic power unit is used for driving the extruding body to extrude or release the rubber sealing ring. Through this embodiment, be favorable to realizing that the extrusion body extrudees or releases the rubber seal to seal the pipeline or relieve the sealed of pipeline.

In one embodiment, the hydraulic power assembly further comprises: the pressure-bearing body is fixed on the piston rod of the plugging head; the plug piston is fixed on the plug piston rod through a limiting assembly; and the cylinder sleeve can move relative to the plugging head piston rod along the axial direction of the plugging head piston rod under the action of the hydraulic power unit, and the extruding body is fixedly connected with the cylinder sleeve. With this embodiment, the direction of movement of the compression body is controlled by the cylinder liner, so that the compression body compresses or releases the rubber packing to seal or unseal the pipe.

In one embodiment, 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; a first oil inlet and a second oil inlet are formed in the two opposite sides of the piston rod of the blocking head; the first reversing valve oil port is communicated with the first oil inlet through a first rubber tube, and the second reversing valve oil port is communicated with the second oil inlet through a second rubber tube; the first oil inlet is communicated with one end, far away from the extrusion body, of the piston through a first oil duct; the second oil inlet is communicated with one end, close to the extrusion body, of the piston through a second oil duct. With this embodiment, the direction of movement of the pressing body can be controlled by controlling the reversing valve, thereby sealing or unsealing the pipe.

In one embodiment, the stop assembly comprises: the piston retainer ring is positioned in the piston retainer ring groove on the plug piston rod; the piston retaining ring is used for blocking the axial movement of the plug piston along the plug piston rod; the retainer ring sleeve is used for fixing the piston retainer ring; the clamp spring is positioned in a clamp spring groove on the piston rod of the blocking head; the clamp spring is used for preventing the retainer ring sleeve from axially moving along the piston rod of the plugging head. Through the embodiment, the piston of the plugging head can be stationary in the whole process.

In one embodiment, an O-ring seal is provided between the stopper piston rod and the stopper piston. Through this embodiment, be favorable to avoiding revealing of hydraulic oil.

In one embodiment, a Glare ring is arranged between the plugging head piston and the cylinder sleeve, and guide belts are arranged on two sides of the Glare ring. Through this embodiment, be favorable to avoiding revealing of hydraulic oil, also be favorable to the cylinder liner smoothly to the stopper end piston removal relatively.

In one embodiment, 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 plug piston rod; an O-shaped sealing ring is arranged between the cylinder sleeve and the extruding body. Through this embodiment, be favorable to avoiding revealing of hydraulic oil, also be favorable to the cylinder liner to remove smoothly.

In one embodiment, 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 which are communicated in sequence; the end, close to the extrusion body, of the axial oil duct of the piston rod is provided with a plug, and the communicating oil duct is parallel to the radial oil duct of the piston rod; and the second oil duct comprises a piston rod radial oil duct and a piston rod axial oil duct which are communicated with each other. Through this embodiment, be favorable to hydraulic oil to get into the one end that the piston is kept away from the extrusion body or is close to the one end of extrusion body smoothly from first oil inlet or second oil inlet to the drive extrusion body removes.

In one embodiment, the hydraulic plugging device further comprises a first hose fixing seat assembly and a second hose fixing seat assembly, wherein the first hose and the second hose are respectively fixed on two sides of the plugging head installation seat; the first hose mount assembly and the second hose mount assembly each include: the bottom surface of the rubber tube fixing seat is attached to the surface of the plugging head mounting seat; the top surface of the rubber tube fixing seat is provided with a first rubber tube groove; the bottom surface of the rubber tube pressing plate is provided with a second rubber tube groove, and a cavity formed by the first rubber tube groove and the second rubber tube groove in a surrounding mode is used for accommodating the first rubber tube or the second rubber tube; and the screw penetrates through the rubber tube pressing plate, the rubber tube fixing seat and the plugging head mounting seat to be in threaded fit, so that the rubber tube pressing plate and the rubber tube fixing seat are fixed on the plugging head mounting seat. Through this embodiment, be favorable to fixed first rubber tube and second rubber tube, avoid it to drop from the both sides of shutoff head mount pad.

In one embodiment, the hydraulic plugging head is connected with the plugging head mounting seat through a plugging head swing rotating shaft, and one end of the plugging head swing rotating shaft is provided with a check ring and a split pin. Through this embodiment, the split pin can avoid droing of retaining ring, is favorable to fixed shutoff head pendulum pivot.

In one embodiment, a guide wheel is arranged at the front end of the hydraulic blocking head, and the guide wheel is connected with the hydraulic blocking head through a wheel shaft. Through this embodiment, the leading wheel plays the guide effect, can play the effect of support guide at hydraulic pressure shutoff head pivoted in-process.

In one embodiment, an arc plate seat is arranged on the sealing side of the plugging head installation seat, the arc plate seat is fixed on the plugging head installation seat through bolts, and the outer side wall of the arc plate seat can be attached to the inner wall of the plugging header so as to provide support for the plugging head installation seat. Through the embodiment, when the hydraulic blocking head moves to the side of the guide wheel under the pressure of fluid in the pipeline, the arc plate seat can provide support for the blocking head mounting seat, so that the stress of the hydraulic blocking device is balanced.

In one embodiment, the hydraulic occlusion device further comprises a signal generator for controlling the hydraulic power unit. Through this embodiment, signal generator can operate the switching-over valve to be favorable to realizing full automatic operation, with the moving direction of automatic control extrusion body.

The application provides a hydraulic pressure plugging device compares in prior art, has following beneficial effect.

1. By means of the hydraulic plugging device, the rubber sealing ring of the hydraulic plugging head can deform under extrusion to seal a pipeline, the occurrence of untight sealing is avoided, meanwhile, the hydraulic plugging head achieves automatic sealing operation through hydraulic control, the working strength of field workers is reduced, and the safety operation level is improved.

2. The moving direction of the extruding body is controlled by the cylinder sleeve, so that the extruding body extrudes or releases the rubber sealing ring to seal the pipeline or release the pipeline.

3. The signal generator controls the reversing valve to control the moving direction of the extruding body, so that the pipeline is automatically sealed or the sealing of the pipeline is released.

The above-mentioned technical characteristics can be combined in various suitable ways or replaced by equivalent technical characteristics as long as the purpose of the invention can be achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings, in which:

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

FIG. 2 shows a schematic cross-sectional view along A-A of FIG. 1;

FIG. 3 shows a schematic cross-sectional view along B-B of FIG. 1;

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

fig. 5 shows a schematic cross-section along the direction D-D in fig. 1.

List of reference numerals:

1-hydraulic blocking head; 2-a pipeline; 4-a plug mounting seat; 5-bolt; 6-plugging an oil cylinder piston rod; 7-plugging the oil cylinder; 8-a screw; 9-blocking the header; 13-a clamp spring; 14-a baffle ring sleeve; 15-piston retainer ring; a 16-O shaped seal ring; 17-cylinder liner; 18-a guide belt; 19-plug head piston; 20-Yx-shaped sealing rings; 22-plugging the piston rod; 23-a first hose; 24-a cotter pin; 25-blocking the swinging rotating shaft of the plug; 26-a retainer ring; 27-a second hose; 28-a pressure-bearing body; 31-rubber seal ring; 32-Glare circle; 34-an extruded body; 35-a guide wheel; 36-an axle; 37-plug; 42-a hydraulic power unit; 43-a reversing valve; 45-arc plate seat; 48-rubber tube pressing plate; 49-rubber tube fixing seat; 50-a first oil inlet; 51-a second oil inlet.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The embodiment provides a hydraulic plugging device, which comprises a plugging head mounting seat 4 and a hydraulic plugging head 1, wherein the hydraulic plugging head 1 is rotatably connected to the plugging head mounting seat 4, the plugging head mounting seat 4 and the hydraulic plugging head 1 are arranged in a plugging header 9, a plugging oil cylinder 7 is arranged at the top of the plugging header 9, one end, far away from the plugging oil cylinder 7, of a plugging oil cylinder piston rod 6 of the plugging oil cylinder 7 is fixedly connected with the plugging head mounting seat 4, and the plugging oil cylinder piston rod 6 can drive the plugging head mounting seat 4 to move up or down under the hydraulic action; the hydraulic blocking head 1 is provided with a rubber sealing ring 31; the hydraulic plugging device further comprises a hydraulic power assembly, and the rubber sealing ring 31 can be extruded and deformed under the action of the hydraulic power assembly to seal the pipeline 2.

As shown in fig. 1, when the pipeline 2 is sealed, firstly, the plugging head mounting seat 4 moves down along with the plugging cylinder piston rod 6, and one end of the plugging cylinder piston rod 6, which is far away from the plugging cylinder 7, is fixedly connected with the plugging head mounting seat 4 through the bolt 5. The hydraulic blocking head 1 is firstly contacted with the pipeline 2, the hydraulic blocking head 1 enters the pipeline 2 through rotation, and the axial direction of the hydraulic blocking head 1 is parallel to the axial direction of the pipeline 2.

Then, the hydraulic power unit presses the rubber packing 31, and the rubber packing 31 is pressed and deformed to be closely attached to the inner wall of the pipe 2, thereby sealing the pipe 2.

At the end of the plugging operation, the hydraulic power assembly releases the rubber seal 31, so that the rubber seal 31 returns to its original size to unseal the pipe 2.

Then, the plugging head mounting seat 4 moves back 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 deform under extrusion to seal the pipeline 2, so that the occurrence of untight sealing is avoided.

Specifically, the size of the rubber sealing ring 31 of the hydraulic blocking head 1 is smaller than the inner diameter of the pipeline 2, so that collision and scratch cannot occur in the process that the hydraulic blocking head 1 enters the pipeline 2, and the damage to the rubber sealing ring 31 can be avoided. Meanwhile, because the deformation of the rubber sealing ring 31 is controllable, when the pipeline 2 is deformed or the inner wall is corroded seriously, the deformation of the rubber sealing ring 31 can be increased by continuous extrusion, and the phenomenon of untight sealing can be avoided.

Meanwhile, the hydraulic plugging head 1 realizes automatic sealing operation through hydraulic control, reduces the working strength of field workers and improves the safety operation level.

Specifically, when the hydraulic plugging head 1 moves up or down, the hydraulic power assembly extrudes or releases the rubber sealing ring 31 and uses hydraulic pressure as a power source, so that automatic sealing operation is realized, the working strength of field workers is reduced, and the safety operation level is improved.

By utilizing the hydraulic plugging device, the rubber sealing ring 31 of the hydraulic plugging head 1 can deform under extrusion to seal the pipeline 2, the occurrence of untight sealing is avoided, meanwhile, the hydraulic plugging head 1 realizes automatic sealing operation through hydraulic control, the working strength of field workers is reduced, and the safety operation level is improved.

In one embodiment, a hydraulic power assembly includes: a pressure-bearing body 28 for supporting the rubber seal 31; the rubber sealing ring 31 is sleeved on the step surface of the pressure bearing body 28; a pressing body 34 for pressing the rubber packing 31; the pressing body 34 can press or release the rubber seal 31; and a hydraulic power unit 42 for driving the pressing body 34 to press or release the rubber packing 31.

As shown in fig. 2, a pressure receiving body 28 for supporting a rubber packing 31; the rubber sealing ring 31 is sleeved on the step surface of the pressure bearing body 28, and in the extrusion process, the pressure bearing body 28 keeps static, and the extrusion body 34 moves towards the pressure bearing body 28, so that the rubber sealing ring 31 is extruded and deformed. As shown in fig. 2, the cross section of the rubber seal 31 is trapezoidal, and the inclined side of the trapezoid is beneficial to increasing the force bearing area of the rubber seal 31. The cross section of the rubber packing 31 may have other shapes such as a rectangular shape.

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

By this embodiment it is advantageously achieved that the pressing body 34 presses or releases the rubber sealing ring 31 to seal the pipe 2 or to unseal the pipe 2.

In one embodiment, the hydraulic power assembly further comprises: the sealing head piston rod 22 and the pressure bearing body 28 are fixed on the sealing head piston rod 22; the plugging head piston 19 is fixed on the plugging head piston rod 22 through a limiting component; and the cylinder sleeve 17, the cylinder sleeve 17 can move relative to the plugging piston rod 22 along the axial direction of the plugging piston rod 22 under the action of the hydraulic power unit 42, and the extruding body 34 is fixedly connected with the cylinder sleeve 17.

As shown in fig. 3, the pressure-receiving body 28 is fastened to the stopper piston rod 22 by means of a screw 8, so that the pressure-receiving body 28 can remain stationary when the rubber seal 31 is pressed or released. The stopper piston 19 is fixed to the stopper piston rod 22 by a stop element, so that the stopper piston 19 can remain stationary when the rubber seal 31 is pressed or released.

The cylinder sleeve 17 and the extruding body 34 are fixed into a whole through the screw 8, and the hydraulic oil pushes the cylinder sleeve 17 to move, so that the extruding body 34 is driven to move, and the extruding body 34 extrudes or releases the rubber sealing ring 31.

With this embodiment, the cylinder liner 17 controls the moving direction of the pressing body 34, so that the pressing body 34 presses or releases the rubber packing 31 to seal the pipe 2 or release the sealing of the pipe 2.

In one embodiment, the hydraulic power unit 42 includes a direction valve 43, and the direction valve 43 is provided with a first direction valve 43 oil port and a second direction valve 43 oil port; a first oil inlet 50 and a second oil inlet 51 are arranged on two opposite sides of the plugging piston rod 22; the oil port of the first reversing valve 43 is communicated with the first oil inlet 50 through a first rubber pipe 23, and the oil port of the second reversing valve 43 is communicated with the second oil inlet 51 through a second rubber pipe 27; the first oil inlet 50 is communicated with one end of the piston far away from the extrusion body 34 through a first oil passage; the second oil inlet 51 communicates with one end of the piston near the compression body 34 through a second oil passage.

When the first direction valve 43 oil port of the direction valve 43 is communicated with oil, hydraulic oil enters the first rubber hose 23 through the first direction valve 43 oil port, enters the first oil inlet 50 along the first rubber hose 23, and then enters one end of the piston far away from the extrusion body 34 to push the cylinder sleeve 17 to move towards the direction far away from the extrusion body 34, so that the extrusion body 34 extrudes the rubber sealing ring 31 to seal the pipeline 2.

When the oil port of the second reversing valve 43 of the reversing valve 43 is communicated with oil, 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 one end of the piston close to the extrusion body 34 to push the cylinder sleeve 17 to move towards the extrusion body 34, so that the extrusion body 34 releases the rubber sealing ring 31, and the sealing of the pipeline 2 is released.

In this embodiment, the direction of movement of the pressure body 34 can be controlled by controlling the direction switching valve 43, thereby sealing the pipe 2 or releasing the sealing of the pipe 2.

In one embodiment, the spacing assembly comprises: the piston retainer ring 15 is positioned in the groove of the piston retainer ring 15 on the plug piston rod 22; the piston retainer ring 15 is used for blocking the axial movement of the plugging head piston 19 along the plugging head piston rod 22; a retainer ring sleeve 14 for fixing a piston retainer ring 15; the clamp spring 13 is positioned in a clamp spring 13 groove on the sealing head piston rod 22; the snap spring 13 is used for blocking the axial movement of the retainer ring sleeve 14 along the plugging head piston rod 22.

By this embodiment, it is advantageously achieved that the closure head piston 19 is stationary during the entire process.

In one embodiment, an O-ring 16 is disposed between the stopper piston rod 22 and the stopper piston 19.

Through this embodiment, be favorable to avoiding revealing of hydraulic oil.

In one embodiment, a greige ring 32 is provided between the choke piston 19 and the cylinder liner 17, and guide strips 18 are provided on both sides of the greige ring 32.

The GREEN ring 32 is composed of a rubber O-shaped ring and a polytetrafluoroethylene ring, and sealing of the plug piston 19 is achieved.

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

By this embodiment, it is advantageous to avoid leakage of hydraulic oil and to facilitate smooth movement of the cylinder liner 17 relative to the choke plug piston 19.

In one embodiment, a Yx-shaped seal ring 20 is arranged between the cylinder liner 17 and the pressure-bearing body 28, and guide belts 18 are arranged on both sides of the Yx-shaped seal ring 20; a Yx-shaped sealing ring 20 and a guide belt 18 are arranged between the cylinder sleeve 17 and the plugging head piston rod 22; an O-shaped sealing ring 16 is arranged between the cylinder sleeve 17 and the extruding body 34.

The Yx-seal 20 is suitable for sealing during reciprocation.

Through this embodiment, be favorable to avoiding revealing of hydraulic oil, also be favorable to cylinder liner 17 to remove smoothly.

In one embodiment, as shown in fig. 2, the first oil passage includes 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; wherein, one end of the axial oil passage of the piston rod, which is close to the extrusion body 34, is provided with a plug 37, and the communicating oil passage is parallel to the radial oil passage of the piston rod; and the second oil duct comprises a piston rod radial oil duct and a piston rod axial oil duct which are communicated with each other.

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

In one embodiment, the hydraulic plugging device further comprises a first hose 23 fixing seat assembly and a second hose 27 fixing seat assembly, which are used for fixing the first hose 23 and the second hose 27 on two sides of the plugging head installation seat 4 respectively; as shown in fig. 5, each of the first hose 23 mount assembly and the second hose 27 mount assembly includes: the bottom surface of the rubber tube fixing seat 49 is attached to the surface of the plugging head mounting seat 4; the top surface of the rubber tube fixing seat 49 is provided with a first rubber tube 23 groove; the bottom surface of the rubber tube pressing plate 48 is provided with a second rubber tube 27 groove, and a cavity formed by enclosing the first rubber tube 23 groove and the second rubber tube 27 groove is used for accommodating the first rubber tube 23 or the second rubber tube 27; and the screw 8 penetrates through the rubber tube pressing plate 48 and the rubber tube fixing seat 49 to be in threaded fit with the plugging head mounting seat 4, so that the rubber tube pressing plate 48 and the rubber tube fixing seat 49 are fixed on the plugging head mounting seat 4.

By the embodiment, the first rubber pipe 23 and the second rubber pipe 27 are fixed, and the first rubber pipe and the second rubber pipe are prevented from falling off from two sides of the plugging head installation seat 4.

In one embodiment, the hydraulic plug 1 is connected to the plug mounting seat 4 by a plug pivot shaft 25, and one end of the plug pivot shaft 25 is provided with a retaining ring 26 and a split pin 24.

As shown in fig. 2, the split pin 24 can prevent the retaining ring 26 from falling off, which is beneficial to fixing the plug swinging shaft 25.

In one embodiment, as shown in fig. 2, the front end of the hydraulic plugging head 1 is provided with a guide wheel 35, and the guide wheel 35 is connected with the hydraulic plugging head 1 through an axle 36.

By the embodiment, the guide wheel 35 plays a guiding role, and can play a supporting and guiding role in the rotation process of the hydraulic plugging head 1.

In one embodiment, as shown in fig. 4, an arc plate seat 45 is disposed on the sealing side of the plugging head installation seat 4, the arc plate seat 45 is fixed on the plugging head installation seat 4 through a bolt 5, and the outer side wall of the arc plate seat 45 can be attached to the inner wall of the plugging header 9 to provide support for the plugging head installation seat 4.

With this embodiment, when the hydraulic plugging head 1 is moved to the side of 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 stress of the hydraulic plugging device is balanced.

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

Preferably, the signal generator is a second lowest frequency signal generator.

By this embodiment, the signal generator is able to operate the reversing valve 43, thereby facilitating fully automatic operation for automatically controlling the direction of movement of the press body 34.

The embodiment also provides a sealing method by using the hydraulic plugging device, and the sealing method comprises the following steps: the hydraulic blocking head 1 enters the pipeline 2 through rotation, and the axial direction of the hydraulic blocking head 1 is parallel to the axial direction of the pipeline 2; the hydraulic power assembly presses the rubber seal 31, and the rubber seal 31 is pressed and deformed to be closely attached to the inner wall of the pipeline 2, thereby sealing the pipeline 2.

By using the sealing method, the rubber sealing ring 31 of the hydraulic plugging head 1 can deform under extrusion to seal the pipeline 2, so that the occurrence of untight sealing is avoided, meanwhile, the hydraulic plugging head 1 realizes automatic sealing operation through hydraulic control, the working strength of field workers is reduced, and the safety operation level is improved.

In one embodiment, the hydraulic plugging head 1 entering the pipe 2 by rotating comprises 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 for guiding, and the hydraulic plugging head 1 rotates around the plugging head swing rotating shaft 25 until the axial direction of the hydraulic plugging head 1 is parallel to the axial direction of the pipeline 2.

In one embodiment, the hydraulic power assembly pressing the rubber seal 31 comprises the following steps: the signal generator operates the reversing valve 43, hydraulic oil enters one end of the piston, which is far away from the extrusion body 34, through the first rubber pipe 23, the cylinder sleeve 17 is pushed to move in the direction far away from the extrusion body 34 under the action of oil pressure, and the extrusion body 34 moves along with the cylinder sleeve 17 to extrude the rubber sealing ring 31.

By this embodiment, the signal generator controls the reversing valve 43, so that the extruding body 34 moves along with the cylinder sleeve 17 to extrude the rubber sealing ring 31, so as to seal the pipeline 2.

In one embodiment, when the plugging operation is finished, the signal generator operates the reversing valve 43, hydraulic oil enters one end of the piston close to the extruding body 34 through the second rubber hose 27, the cylinder sleeve 17 is pushed to move towards the extruding body 34 under the action of the hydraulic oil, and the extruding body 34 moves along with the cylinder sleeve 17 to release the rubber sealing ring 31, so that the rubber sealing ring 31 returns to the original size to release the sealing of the pipeline 2.

By this embodiment, the signal generator controls the reversing valve 43, so that the pressing body 34 moves along with the cylinder liner 17 to release the rubber sealing ring 31, so as to release the sealing of the pipeline 2.

Example one

The embodiment provides a hydraulic plugging device, which comprises a plugging head mounting seat 4 and a hydraulic plugging head 1, wherein the hydraulic plugging head 1 is rotatably connected to the plugging head mounting seat 4, the plugging head mounting seat 4 and the hydraulic plugging head 1 are mounted in a plugging header 9, a plugging oil cylinder 7 is mounted at the top of the plugging header 9, one end, far away from the plugging oil cylinder 7, of a plugging oil cylinder piston rod 6 of the plugging oil cylinder 7 is fixedly connected with the plugging head mounting seat 4, and the plugging oil cylinder piston rod 6 can drive the plugging head mounting seat 4 to move up or down under the hydraulic action; the hydraulic blocking head 1 is provided with a rubber sealing ring 31; the hydraulic plugging device further comprises a hydraulic power assembly, and the rubber sealing ring 31 can be extruded and deformed under the action of the hydraulic power assembly to seal the pipeline 2.

Specifically, the size of the rubber seal ring 31 of the hydraulic blocking head 1 is smaller than the inner diameter of the pipeline 2, so that the hydraulic blocking head 1 cannot collide or scratch in the process of entering the pipeline 2, and the damage to the rubber seal ring 31 can be avoided. Meanwhile, because the deformation of the rubber sealing ring 31 is controllable, when the pipeline 2 is deformed or the inner wall is corroded seriously, the deformation of the rubber sealing ring 31 can be increased by continuous extrusion, and the phenomenon of untight sealing can be avoided.

Example two

In one embodiment, the hydraulic power unit 42 includes a directional control valve 43, and the directional control valve 43 is provided with a first directional control valve 43 oil port and a second directional control valve 43 oil port; a first oil inlet 50 and a second oil inlet 51 are arranged on two opposite sides of the plugging piston rod 22; the oil port of the first reversing valve 43 is communicated with the first oil inlet 50 through a first rubber pipe 23, and the oil port of the second reversing valve 43 is communicated with the second oil inlet 51 through a second rubber pipe 27; the first oil inlet 50 is communicated with one end of the piston far away from the extrusion body 34 through a first oil passage; the second oil inlet 51 is communicated with one end of the piston close to the extrusion body 34 through a second oil passage.

When the first direction valve 43 oil port of the direction valve 43 is communicated with oil, hydraulic oil enters the first rubber hose 23 through the first direction valve 43 oil port, enters the first oil inlet 50 along the first rubber hose 23, and then enters one end of the piston far away from the extruding body 34, so as to push the cylinder sleeve 17 to move towards the direction far away from the extruding body 34, so that the extruding body 34 extrudes the rubber sealing ring 31, and thus the pipeline 2 is sealed.

With this embodiment, the direction of movement of the pressure body 34 can be controlled by controlling the direction change valve 43, thereby sealing the pipe 2 or releasing the sealing of the pipe 2.

The hydraulic plugging device further comprises a signal generator for controlling the hydraulic power unit 42.

Preferably, the signal generator is a second lowest frequency signal generator.

The signal generator is capable of operating the diverter valve 43 to facilitate fully automatic operation to automatically control the direction of movement of the press body 34.

EXAMPLE III

In this embodiment, the hydraulic power assembly includes: a pressure-bearing body 28 for supporting the rubber seal 31; the rubber sealing ring 31 is sleeved on the step surface of the pressure bearing body 28; a pressing body 34 for pressing the rubber packing 31; the pressing body 34 can press or release the rubber seal 31; and a hydraulic power unit 42 for driving the pressing body 34 to press or release the rubber packing 31.

As shown in fig. 2, a pressure receiving body 28 for supporting a rubber packing 31; the rubber seal ring 31 is sleeved on the step surface of the pressure-bearing body 28, in the extrusion process, the pressure-bearing body 28 keeps static, and the extrusion body 34 moves towards the pressure-bearing body 28, so that the rubber seal ring 31 is extruded and deformed. As shown in fig. 2, the cross section of the rubber seal 31 is trapezoidal, and the inclined side of the trapezoid is beneficial to increasing the force bearing area of the rubber seal 31. The cross section of the rubber packing 31 may have other shapes such as a rectangular shape.

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

With this embodiment, the cylinder liner 17 is used to control the moving direction of the pressing body 34, so that the pressing body 34 presses or releases the rubber packing 31 to seal the pipe 2 or release the sealing of the pipe 2.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. A hydraulic plugging device is characterized by comprising a plugging head mounting seat and a hydraulic plugging head, wherein the hydraulic plugging head is rotatably connected to the plugging head mounting seat, the plugging head mounting seat and the hydraulic plugging head are mounted in a plugging header, a plugging oil cylinder is mounted 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 up or down 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 occlusion 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 extruding body is used for extruding the rubber sealing ring; the extrusion body can extrude or release the rubber sealing ring; and the number of the first and second groups,

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

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

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

the plug piston is fixed on the plug piston rod through a limiting assembly; and the number of the first and second groups,

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

4. The hydraulic plugging device of claim 3, wherein the hydraulic power unit comprises a directional control valve, and a first directional control valve oil port and a second directional control valve oil port are oppositely arranged on the directional control valve; a first oil inlet and a second oil inlet are formed in the two opposite sides of the piston rod of the blocking head; the first reversing valve oil port is communicated with the first oil inlet through a first rubber tube, and the second reversing valve oil port is communicated with the second oil inlet through a second rubber tube; the first oil inlet is communicated with one end, far away from the extrusion body, of the piston through a first oil duct; the second oil inlet is communicated with one end, close to the extrusion body, of the piston through a second oil duct.

5. The hydraulic occlusion device of claim 3, wherein the retention assembly comprises:

the piston retainer ring is positioned in the piston retainer ring groove on the plug piston rod; the piston retaining ring is used for blocking the axial movement of the plug piston along the plug piston rod;

the retainer ring sleeve is used for fixing the piston retainer ring; and the number of the first and second groups,

the clamp spring is positioned in a clamp spring groove on the plug piston rod; the clamp spring is used for preventing the retainer ring sleeve from axially moving along the piston rod of the plugging head.

6. The hydraulic plugging device of claim 3, wherein an O-ring seal is disposed between the plugging head piston rod and the plugging head piston.

7. The hydraulic plugging device of claim 3, wherein a GREEN is arranged between the plugging head piston and the cylinder sleeve, and guide belts are arranged on two sides of the GREEN.

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 plug piston rod;

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

9. The hydraulic plugging device according to 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 which are sequentially communicated; the end, close to the extrusion body, of the axial oil duct of the piston rod is provided with a plug, and the communicating oil duct is parallel to the radial oil duct of the piston rod; and the number of the first and second electrodes,

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 either side of the plugging head mounting base;

the first hose mount assembly and the second hose mount assembly each include:

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

the bottom surface of the rubber tube pressing plate is provided with a second rubber tube groove, and a cavity formed by the first rubber tube groove and the second rubber tube groove in a surrounding mode is used for accommodating the first rubber tube or the second rubber tube; and the number of the first and second groups,

and the screw penetrates through the rubber tube pressing plate, the rubber tube fixing seat and the plugging head mounting seat in threaded fit, so that the rubber tube pressing plate and the rubber tube 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 swing rotating shaft, and a check ring and a split pin are arranged at one end of the plugging head swing rotating shaft.

12. The hydraulic plugging device of 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 an arc plate seat is arranged on the sealing side of the plugging head mounting seat, the arc plate seat is fixed on the plugging head mounting seat through a bolt, and the outer side wall of the arc plate seat can be attached to the inner wall of the plugging header so as to provide support for the plugging head mounting seat.

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