A chuck type pipeline plugging device

Abstract

The present invention relates to a chuck type pipeline plugging device, which mainly includes a claw plate, a claw, an extrusion plate, an elastic sealing ring, a planetary gear system, a gear box, a plugging device box, a support wheel assembly, a communication control device and a power supply. The planetary gear system includes an internal gear, a sun gear, a sun gear gear shaft, three planetary gears, and a planetary frame; the claw is matched with the track groove of the claw plate, the flat end face of the extrusion plate is close to the claw, the oblique end face is close to the inner wall of the elastic sealing ring, the plane thread of the planetary frame is matched with the plane thread of the claw, the internal gear is fixedly connected with the gear box, and the support wheel assembly is fixedly installed at the front and rear of the plugging device. The present invention reaches the plugging position under the push of the fluid medium in the pipe, the driving motor transmits the torque to the planetary frame through the planetary gear system, the planetary frame pushes the claw out through the plane thread transmission, the claw clamps the inner wall of the pipeline, the position of the plugging device is locked, and the elastic sealing ring is radially expanded by extrusion to achieve plugging; after the operation is completed, the driving motor drives in reverse, retracts the claw, and realizes unsealing. The present invention has the advantages of being self-locking after plugging, saving energy, being more reliable in plugging, and having no secondary damage to the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline plugging, in particular to a chuck type pipeline plugger. Background Art

[0002] Pipeline transportation is the most common mode of transportation for oil and natural gas. Pipelines will inevitably be damaged during long-term transportation. When a pipeline fails, emergency repairs are required in a timely manner. Therefore, the development of pipeline pluggers is particularly important.

[0003] At present, the main pipeline plugging technologies include pressure-opening plugging technology and in-pipe high-pressure intelligent plugging technology. Pressure-opening plugging technology cannot be applied in some occasions due to its own principle problems. In-pipe pluggers at home and abroad mainly use hydraulic systems for plugging, which are locked by slips. During the time of slip locking, the hydraulic cylinder needs to maintain pressure after pressurization. However, this pressure-maintaining self-locking of the hydraulic cylinder is not very safe and reliable. Once the hydraulic cylinder leaks, the plunger will still slowly return to its position, which is likely to cause a safety accident.

[0004] In view of the problems of poor reliability and low plugging efficiency of the above pluggers, the present invention proposes a chuck-type pipeline plugger, which is more reliable in self-locking after plugging and has higher plugging efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a chuck-type pipeline plugging device to solve the technical problems of poor reliability and low plugging efficiency of current pipeline plugging devices. The technical solution adopted is as follows:

[0006] The present invention relates to a chuck-type pipeline plugger, comprising a claw plate, a claw, an extrusion plate, an elastic sealing ring, a planetary gear system, a gear box, a plugger box, a support wheel assembly, a communication control device and a power supply. The planetary gear system comprises an internal gear, a sun gear, three planetary gears and a planetary carrier; the claw is matched with a track groove of the claw plate, the flat end face of the extrusion plate is close to the claw, and the oblique end face is close to the inner wall of the elastic sealing ring, the plane thread of the planetary carrier end is matched with the plane thread of the claw end, the internal gear is fixedly connected to the gear box, and the support wheel assemblies are respectively installed at the front and rear of the plugger.

[0007] Preferably, a plurality of claw track grooves are evenly distributed radially on the end surface of the claw plate, and the claw can slide smoothly in the track groove; a circular groove is provided on the side of the claw plate facing away from the track groove, and the circular groove is matched with the clearance of the planet carrier, and the depth of the circular groove is preferably such that the claw can just expose the entire claw end plane thread after the claw is installed. The beneficial effect is that the planet carrier end plane thread can match the claw end plane thread, thereby transmitting power.

[0008] Preferably, a planet carrier end plane thread is provided on a side of the planet carrier facing away from the planet gear.

[0009] Preferably, the claws are matched with the track groove gap and can slide relatively, the arc radius of the end of the claw is the same as the radius of the pipe to be blocked, and fine teeth are evenly distributed on the end surface, the bottom surface of the claw has a claw end plane thread, the plane thread matches the plane thread of the planetary frame, and the end of the claw has an arc slope, which matches the inner side of the extrusion disk. The beneficial effect is that the fine teeth at the end of the claw can have a larger contact area with the inner wall of the pipe, and the arc slope at the end of the claw can push the extrusion disk to move in the direction of extruding the elastic sealing ring.

[0010] Preferably, the extrusion disk is an annular disk body, which is installed on the outside of the claw disk and can slide axially relative to the claw disk.

[0011] Preferably, a boss is provided on the periphery of the gear housing.

[0012] Preferably, the elastic sealing ring is provided with an inclined end face and a flat end face, the inclined end face is close to the inclined end face of the extrusion disk, and the flat end face is close to the boss of the gear box body. The beneficial effect is that the elastic sealing ring can only expand radially when being squeezed by the extrusion disk.

[0013] Preferably, the occluder housing is fixedly connected to the gear train housing.

[0014] Preferably, the communication control device and the power supply are fixedly installed inside the occluder box.

[0015] Compared with the prior art, the chuck-type pipe plug of the present invention has the following characteristics and advantages: the present invention is driven by an electric motor, which is more efficient and easier to control than a hydraulic cylinder drive, while occupying a small space and making good use of the self-locking characteristic of the plane thread transmission, effectively saving electricity for the plug.

[0016] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, the characteristics and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a cross-sectional view of a chuck-type pipeline plugging device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the assembly and disassembly of a chuck-type pipeline plugging device according to an embodiment of the present invention;

[0020] Figure 3This is a schematic structural diagram of a clamping claw installed on a clamping claw plate in a clamping disc type pipeline plugging device according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of a claw disk in a chuck-type pipeline plugging device according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the clamping claws in the chuck-type pipeline plugging device according to an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of a planetary gear system in a chuck-type pipe plugging device according to an embodiment of the present invention.

[0024] in,

[0025] 1. Claw plate, 2. Track groove, 3. Claw, 4. Flat thread on the claw end, 5. Fine teeth, 6. Arc-shaped ramp, 7. Extrusion plate, 8. Elastic sealing ring, 9. Support wheel assembly, 10. Planetary gear train, 11. Internal gear, 12. Sun gear, 13. Planetary gear, 14. Planetary carrier, 15. Gear box, 16. Occluder box, 17. Communication control device and power supply, 18. Drive motor, 19. Flat thread on the planetary carrier end, 20. Circular groove, 21. Gear box boss. DETAILED DESCRIPTION

[0026] like Figures 1 to 6 As shown, a chuck-type pipeline plugger is composed of a claw plate 1, a claw 3, an extrusion plate 7, an elastic sealing ring 8, a planetary gear train 10, a gear box 15, a plugger box 16, a support wheel assembly 9, a communication control device and a power supply 17, wherein the planetary gear train 10 includes an internal gear 11, a sun gear 12, three planetary gears 13, and a planet carrier 14; the claw 3 cooperates with the track groove 2 of the claw plate 1, the flat end face of the extrusion plate 7 is close to the claw 3, and the oblique end face is close to the inner wall of the elastic sealing ring 8, the flat thread 19 of the planet carrier end cooperates with the flat thread 4 of the claw end, the internal gear 11 is fixedly connected to the gear box 15, and the support wheel assembly 9 is fixedly installed at the front and rear of the plugger.

[0027] See also Figure 3 A plurality of claw 3 track grooves 2 are evenly distributed radially on the end surface of the claw plate 1; a circular groove 20 is provided at one end of the claw plate 1 facing away from the track groove 2, and the circular groove 20 is clearance-matched with the planet carrier 14. The depth of the circular groove 20 is preferably such that the claw 3 can just expose the entire claw end plane thread 4 after the claw 3 is installed.

[0028] See also Figure 6 A planet carrier end plane thread 19 is provided on a side of the planet carrier 14 facing away from the planet gear 13 .

[0029] See also Figures 3 to 5The claw 3 is clearance-matched with the track groove 2 and can slide relatively. The diameter of the arc surface at the end of the claw 3 is equal to the inner diameter of the pipe to be blocked, and fine teeth 5 are evenly distributed on the end surface. The bottom surface of the claw 3 has a claw end flat thread 4, and the flat thread cooperates with the flat thread of the planetary carrier 14. The end of the claw 3 has an arc-shaped slope 6, and the arc-shaped slope 6 cooperates with the extrusion disk 7.

[0030] See also Figure 1 , Figure 2 and Figure 5 The extrusion disk 7 is an annular disk body, which is installed outside the claw disk 1 and can slide relative to the claw disk 1 in the axial direction. When the occluder is not in operation, the flat end surface of the extrusion disk 7 is close to the boss of the claw 3. When the occluder is in operation, the arc-shaped slope 6 of the claw 3 will squeeze the extrusion disk 7.

[0031] See also Figure 6 A gear housing boss 21 is disposed on the periphery of the gear housing 15 .

[0032] See also Figure 1 and Figure 2 The elastic sealing ring 8 is provided with an inclined end face and a flat end face. The inclined end face is close to the inclined end face of the extrusion disk 7, and the flat end face is close to the gear box body boss 21. When squeezed by the extrusion disk 7, it expands radially to achieve the purpose of sealing the pipeline.

[0033] See also Figure 1 and Figure 2 The occluder housing 16 is fixedly connected to the gear housing 15, and the communication control device and the power supply 17 are fixedly installed inside the housing.

[0034] A chuck-type pipeline plugging device, the plugging process is as follows:

[0035] The plugger reaches the desired plugging position under the push of the medium in the pipe, and the drive motor 18 starts to work. The power of the drive motor 18 is decelerated by the planetary gear system 10, the rotation speed of the planetary carrier 14 is slowed down, and the torque is increased. The planetary carrier 14 transmits the power to the claw 3 through the plane thread transmission, and the claw 3 expands outward along the track groove 2. The fine teeth 5 on the end face of the claw 3 clamp the inner wall of the pipe to fix the position of the plugger. At the same time, the arc-shaped slope 6 of the claw 3 moves the extrusion disk 7 in the direction of the extrusion elastic sealing ring 8, which extrudes the elastic sealing ring 8 radially to achieve plugging.

[0036] A chuck-type pipeline plugging device, the plugging process is as follows:

[0037] After the pipeline maintenance and repair work is completed, the driving motor 18 rotates in the opposite direction, the claw 3 is retracted along the track groove 2, and the elastic sealing ring is not squeezed and shrinks, thereby achieving unsealing.

[0038] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A chuck-type pipeline plugging device, comprising a support wheel assembly and a planetary gear train, wherein the planetary gear train comprises an internal gear, a sun gear, three planetary gears, and a planet carrier; characterized in that: It also includes a claw plate, a claw, an extrusion plate, an elastic sealing ring, a planetary gear train, a gear box, an occluder box, a communication control device and a power supply; the claw is matched with the track groove of the claw plate, the flat end face of the extrusion plate is close to the claw, and the oblique end face is close to the inner wall of the elastic sealing ring, the plane thread of the planetary frame end is matched with the plane thread of the claw end, the internal gear is fixedly connected to the gear box, and the support wheel assembly is fixedly installed at the front and rear of the occluder; The claw plate is provided with a plurality of claw track grooves evenly distributed radially; a circular groove is provided on a side of the claw plate facing away from the track groove, and the circular groove is in clearance fit with the planet carrier; A planet carrier end plane thread is provided on a side of the planet carrier facing away from the planet gear; The claw is in clearance fit with the track groove and can slide relatively. The bottom surface of the claw has a plane thread, which matches with the plane thread of the planet carrier. The end of the claw is provided with an arc-shaped slope, which matches with the inner side of the extrusion disk. The extrusion disk is an annular disk body, which is installed on the outside of the claw disk and can slide relative to the claw disk in the axial direction; The outer periphery of the gear housing is provided with a gear housing boss; The elastic sealing ring is provided with an inclined end surface and a flat end surface, the inclined end surface is close to the inclined end surface of the extrusion plate, and the flat end surface is close to the gear box body boss.

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