Temporary plugging device for pipeline maintenance

Abstract

The present invention relates to the technical field of pipeline construction, and specifically to a temporary plugging device for pipeline maintenance. The plugging mechanism is connected to a positioning cylinder frame, a positioning chuck is fixedly connected to one end of the positioning cylinder frame away from the motor, a rubber gasket is coaxially arranged on the side of the positioning chuck away from the positioning cylinder frame, one side of the rubber gasket is fixedly connected to the positioning chuck, a movable chuck is arranged on the side of the rubber gasket away from the positioning chuck, the movable chuck abuts against the other side of the rubber gasket, a positioning and tightening mechanism is arranged on the side of the movable chuck away from the rubber gasket, a plurality of tightening support rods are uniformly arranged in an array at equal angles along the circumferential direction of the positioning cylinder frame, a plurality of tightening gaskets are respectively fixedly connected to a plurality of tightening support rods, and an anti-reverse mechanism is arranged on the side of the movable chuck close to the plurality of tightening support rods and ensures that the plurality of tightening support rods can move in one direction. The device is simple to operate and easy to use. Compared with the cumbersome blind plate plugging, the device does not need to weld and cut the pipe mouth, thereby reducing damage to the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline construction, in particular to a temporary plugging device for pipeline maintenance. Background Art

[0002] During the construction of pipelines, it is necessary to temporarily block the pipelines to cut off the transported medium and facilitate the maintenance of the pipelines. At present, air bags are usually used for blocking during construction.

[0003] Although some plugging devices use airbags to temporarily plug the pipe, airbags are generally used to plug small-diameter sewage pipes (φ≤1000mm); the airbag plugging time should not be too long, and the air pressure must be monitored in real time; the airbag plugging has great safety hazards during the construction process, and it will explode when encountering sharp objects or violent impacts. At the same time, the requirements for the pipe are relatively high, and there must be no burrs, stones or other sharp objects on the inner wall, otherwise the airbag may be punctured. In addition, the cost of customizing airbags is expensive, and the overall cost of the device is relatively high.

[0004] When blind plate plugging is used, a steel plate is welded at the pipe mouth to be plugged, which serves the purpose of temporary plugging. Its advantage is low plugging cost, but because it is temporary plugging, its main disadvantage is that the blind plate causes considerable damage to the pipe mouth during welding and cutting, and the recycling rate of the blind plate is low. Summary of the invention

[0005] Based on this, it is necessary to provide a temporary plugging device for pipeline maintenance in response to the existing technical problems.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0007] Temporary plugging device for pipeline maintenance, including:

[0008] Positioning cylinder rack,

[0009] The motor is fixedly connected to one end of the positioning cylinder frame;

[0010] The blocking mechanism is connected to the positioning cylinder frame and includes a positioning chuck, a movable chuck and a rubber gasket. The positioning chuck is fixedly connected to one end of the positioning cylinder frame away from the motor. The rubber gasket is coaxially arranged on a side of the positioning chuck away from the positioning cylinder frame. One side of the rubber gasket is fixedly connected to the positioning chuck. The movable chuck is coaxially arranged on a side of the rubber gasket away from the positioning chuck. The movable chuck abuts against the other side of the rubber gasket.

[0011] The positioning and tightening mechanism is arranged on the side of the movable chuck away from the rubber gasket, and comprises a plurality of tightening support rods and a plurality of tightening washers. The plurality of tightening support rods are arranged in an array at equal angles along the circumferential direction of the positioning cylinder frame, and the plurality of tightening washers are respectively fixedly connected to the plurality of tightening support rods;

[0012] The anti-reversal mechanism is arranged on one side of the movable clamping plate close to the plurality of tightening support rods and ensures that the plurality of tightening support rods can move in one direction.

[0013] Furthermore, the blocking mechanism also includes a driving gear, a driven gear, a positioning center roller and a driving screw sleeve. The driving gear is rotatably connected to the positioning cylinder frame and is coaxially fixedly connected to the output end of the motor. The driven gear is meshed with the driving gear and is rotatably connected to the positioning cylinder frame coaxially. The positioning center roller is coaxially fixedly connected to the positioning cylinder frame. The driving screw sleeve is rotatably connected to the positioning center roller coaxially, and the driving screw sleeve is coaxially fixedly connected to the driven gear.

[0014] Furthermore, the sealing mechanism also includes a movable screw seat, a transfer sleeve, a first magnetic sleeve, a second magnetic sleeve, a power toothed disc, a power gear and a plurality of transfer pins. The movable screw seat is coaxially fixedly connected to the movable chuck, the movable screw seat is threadedly connected to the driving screw sleeve, and a plurality of transfer pins are arranged in an array at equal angles along the circumferential direction of the movable screw seat. One end of the transfer pin is fixedly connected to the movable screw seat, and the other end is slidingly connected to the transfer sleeve. The first magnetic sleeve is coaxially rotationally connected to the positioning center roller, the first magnetic sleeve is fixedly connected to one end of the driving screw sleeve away from the driven gear, the second magnetic sleeve is arranged at one end of the first magnetic sleeve away from the driving screw sleeve, the second magnetic sleeve is coaxially rotationally connected to the positioning center roller, the second magnetic sleeve is connected to the first magnetic sleeve through magnetic transmission, the second magnetic sleeve is fixedly connected to the transfer sleeve, the power toothed disc is coaxially transmission-connected to the transfer sleeve, the power gear is meshed with the power toothed disc and is transmission-connected to the positioning and tightening mechanism.

[0015] Furthermore, the positioning and tightening mechanism also includes a positioning frame, a center disc, a center gear disc, a driving gear, a transfer disc and a number of limit pins. The positioning frame is fixedly connected to the positioning center roller coaxially, and a number of tightening support rods are slidably connected to the positioning frame. The center gear disc is rotatably connected to a side of the positioning frame close to the power gear disc, the center disc is fixedly connected to the center gear disc coaxially, and the center disc is formed with a number of limit arc grooves at equal angles along the circumferential direction. A number of limit pins are respectively slidably connected to the number of limit arc grooves, and a number of limit pins are respectively fixedly connected to the number of tightening support rods. The driving gear is rotatably connected to the positioning frame and meshes with the center gear disc. The transfer disc is arranged on a side of the center disc away from the positioning frame and is fixedly connected to the positioning center roller. The power gear disc is rotatably connected to the transfer disc coaxially, and the power gear is rotatably connected to the transfer disc and is fixedly connected to the drive gear coaxially.

[0016] Furthermore, the anti-reversal mechanism also includes a positioning disc frame, a clamping ratchet, a pawl, a clamping spring and a first pad. The positioning disc frame is fixedly connected to a side of the adapter disc away from the positioning frame, the clamping ratchet is fixedly connected coaxially with the power gear, the pawl is clamped against an outer edge of the clamping ratchet, the clamping spring is sleeved on the outside of the pawl, the first pad is fixedly connected to the positioning disc frame, one end of the pawl away from the clamping ratchet is slidably connected to the first pad, one end of the clamping spring is fixedly connected to the pawl, and the other end is fixedly connected to the first pad.

[0017] Furthermore, the anti-reverse mechanism also includes a transfer pad, a transfer roller, a push-bevel block, a reset spring, a reset rack and a second pad. The transfer pad is slidably connected to the positioning disc frame, one end of the transfer pad is fixedly connected to the pawl, and the other end is rotatably connected to the transfer roller. The push-bevel block is slidably arranged at the upper end of the transfer roller, and the lower end of the push-bevel block is abutted against the transfer roller. One end of the reset spring is fixedly connected to the push-bevel block, and the other end is fixedly connected to the second pad. The second pad is fixedly connected to the positioning disc frame, and the reset rack is fixedly connected to the push-bevel block.

[0018] Furthermore, the anti-reversal mechanism also includes a positioning gear seat, a transfer gear ring, a transfer gear and a reset gear. The positioning gear seat is fixedly connected coaxially with the positioning disc frame, the transfer gear ring is rotationally connected to the positioning gear seat coaxially and is fixedly connected to the transfer sleeve, the transfer gear is rotationally connected to the positioning gear seat and meshes with the transfer gear ring, the reset gear is rotationally connected to the positioning disc frame and meshes with the reset rack, and the reset gear and the transfer gear are connected via a one-way ratchet transmission.

[0019] Furthermore, the anti-reversal mechanism also includes a buffer tooth block and a buffer spring, one end of the buffer spring is fixedly connected to an end of the reset rack away from the transfer pad, the buffer tooth block is fixedly connected to the other end of the buffer spring, and the buffer tooth block can mesh with the reset gear.

[0020] Furthermore, the anti-reverse mechanism also includes a buffer sleeve and two buffer pins. The buffer sleeve is rotatably connected to the power gear disc coaxially, and the buffer sleeve is fixedly connected to the adapter sleeve coaxially. The two buffer pins are arranged along the circumferential direction of the power gear disc and fixedly connected to the power gear disc. The buffer sleeve is formed with a buffer flange along the circumferential direction, and the buffer flange can respectively abut against the two buffer pins.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] First, the device is easy to operate and can be installed and removed in the pipeline by a motor drive. Compared with the cumbersome blind plate plugging, the device does not need to weld or cut the pipe opening, thereby reducing damage to the pipeline;

[0023] Second, compared with airbag plugging, this device is safer. The rubber gasket in this device does not need to worry about explosion when encountering sharp objects or violent impact. At the same time, it is compatible with the characteristics of the airbag's adaptability to the pipeline. Compared with customized airbags, rubber gaskets are less expensive and can be widely promoted and applied.

[0024] Third: This device pre-reinforces the device through a positioning and tightening mechanism, thereby improving the stability of the device when sealing the pipeline. At the same time, the positioning and tightening mechanism can also disperse and buffer the direct impact of water pressure or air pressure on the rubber gasket, optimize the sealing structure inside the pipeline, and extend the service life of the rubber gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment;

[0026] Figure 2 is a side view of an embodiment;

[0027] Figure 3 is a plan side sectional view of an embodiment;

[0028] Figure 4 is a perspective side cross-sectional view of an embodiment;

[0029] Figure 5 yes Figure 4 A magnified view of the structure at center;

[0030] Figure 6 yes Figure 4 A magnified view of the structure at B in the middle;

[0031] Figure 7 is a schematic diagram of the three-dimensional structure installation of the first magnetic sleeve and the second magnetic sleeve in the embodiment;

[0032] Figure 8 Schematic diagram of the installation of the buffer sleeve and the buffer pin in the embodiment;

[0033] Fig. 9 Schematic diagram of the partial structure of the anti-reversal mechanism and the positioning and tightening mechanism in the embodiment;

[0034] Fig.10 is a schematic diagram of the three-dimensional structure of the positioning and tightening mechanism in the embodiment;

[0035] Fig.11 is a side view of the anti-reversal mechanism and the positioning and tightening mechanism in the embodiment;

[0036] Fig.12 yes Fig.11 A magnified view of the structure at C in the middle;

[0037] Fig.13 It is a three-dimensional structural schematic diagram of the transfer gear, the one-way ratchet and the reset gear in the embodiment.

[0038] The numbers in the figure are:

[0039] 1. Positioning cylinder frame; 2. Motor; 3. Sealing mechanism; 4. Positioning chuck; 5. Active chuck; 6. Rubber gasket; 7. Driving gear; 8. Driven gear; 9. Positioning center roller; 10. Driving screw sleeve; 11. Active screw seat; 12. Transfer pin; 13. Transfer sleeve; 14. First magnetic sleeve; 15. Second magnetic sleeve; 16. Power gear; 17. Power gear; 18. Positioning and tightening mechanism; 19. Positioning frame; 20. Tightening support rod; 21. Tightening gasket; 22. Center disc; 23. Limiting arc groove; 24. Limiting pin; 25. Center gear ; 26. Driving gear; 27. Transfer disc; 28. Anti-reverse mechanism; 29. ​​Positioning disc frame; 30. Clamping ratchet; 31. Ratchet; 32. Clamping spring; 33. First pad; 34. Transfer pad; 35. Transfer roller; 36. Pushing bevel block; 37. Reset tension spring; 38. Reset rack; 39. Buffer tooth block; 40. Buffer spring; 41. Second pad; 42. Positioning gear seat; 43. Transfer gear ring; 44. Transfer gear; 45. One-way ratchet; 46. Reset gear; 47. Buffer sleeve; 48. Buffer flange; 49. Buffer pin. DETAILED DESCRIPTION

[0040] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] refer to Figures 1 to 13 The temporary plugging device for pipeline maintenance comprises a positioning cylinder frame 1, a motor 2, a plugging mechanism 3, a positioning and tightening mechanism 18 and an anti-reversal mechanism 28. The motor 2 is fixedly connected to one end of the positioning cylinder frame 1, and the plugging mechanism 3 is connected to the positioning cylinder frame 1. The plugging mechanism 3 comprises a positioning chuck 4, a movable chuck 5 and a rubber gasket 6. The positioning chuck 4 is fixedly connected to the end of the positioning cylinder frame 1 away from the motor 2. Figure 1 and Figure 2 The rubber gasket 6 is coaxially arranged on the side of the positioning chuck 4 away from the positioning cylinder frame 1, one side of the rubber gasket 6 is fixedly connected to the positioning chuck 4, the movable chuck 5 is coaxially arranged on the side of the rubber gasket 6 away from the positioning chuck 4, the movable chuck 5 is abutted against the other side of the rubber gasket 6, the positioning and tightening mechanism 18 is arranged on the side of the movable chuck 5 away from the rubber gasket 6, the positioning and tightening mechanism 18 includes a plurality of tightening support rods 20 and a plurality of tightening gaskets 21, the plurality of tightening support rods 20 are uniformly arranged in an array at equal angles along the circumferential direction of the positioning cylinder frame 1, the plurality of tightening gaskets 21 are respectively fixedly connected to the plurality of tightening support rods 20, and the anti-reverse mechanism 28 is arranged on the side of the movable chuck 5 close to the plurality of tightening support rods 20 and ensures that the plurality of tightening support rods 20 can move in one direction.

[0042] When the device is in operation, the operator inserts the positioning cylinder frame 1 into the pipeline along the pipeline axis direction, and then starts the motor 2. After the motor 2 is started, it will first drive the plurality of tightening rods 20 to move toward the inner wall of the pipeline through the positioning tightening mechanism 18, and after the plurality of tightening rods 20 move, they will drive the plurality of tightening gaskets 21 to press against the inner wall of the pipeline to prevent the tightening rods 20 from damaging the inner wall of the pipeline when they contact the inner wall of the pipeline. After the plurality of tightening rods 20 drive the corresponding tightening gaskets 21 to press against the inner wall of the pipeline, the motor 2 continues to run and drives the movable chuck 5 to move toward the rubber gasket 6, and then the movable chuck 5 pushes the rubber gasket 6 to deform, and the deformed rubber gasket 6 will tighten against the inner wall of the pipeline to achieve temporary blocking of the pipeline.

[0043] In order to supplement the specific structure of the blocking mechanism 3, the following features are also specifically provided:

[0044] The blocking mechanism 3 also includes a driving gear 7, a driven gear 8, a positioning center roller 9 and a driving screw sleeve 10. The driving gear 7 is rotatably connected to the positioning cylinder frame 1 and is coaxially fixed to the output end of the motor 2. Figure 3 and Figure 5 , the driven gear 8 is meshed with the driving gear 7 and is coaxially connected to the positioning cylinder frame 1, the positioning center roller 9 is coaxially fixed to the positioning cylinder frame 1, the driving screw sleeve 10 is coaxially connected to the positioning center roller 9, and the driving screw sleeve 10 is coaxially fixed to the driven gear 8. After the motor 2 is started, the motor 2 will drive the driven gear 8 to rotate through the driving gear 7, and the driven gear 8 will drive the driving screw sleeve 10 to rotate.

[0045] In order to realize that after the plurality of tightening rods 20 drive the corresponding tightening gaskets 21 to press against the inner wall of the pipe, the motor 2 continues to run to drive the movable chuck 5 to move toward the direction close to the rubber gasket 6, the following features are also specifically provided:

[0046] The blocking mechanism 3 also includes a movable screw seat 11, a transfer sleeve 13, a first magnetic sleeve 14, a second magnetic sleeve 15, a power toothed disc 16, a power gear 17 and a plurality of transfer pins 12. The movable screw seat 11 is coaxially fixedly connected to the movable chuck 5. Figure 4 The movable screw seat 11 is threadedly connected to the driving screw sleeve 10, and a plurality of transfer pins 12 are arranged in an array with equal angles along the circumferential direction of the movable screw seat 11. Figure 6 One end of the transfer pin 12 is fixedly connected to the movable screw seat 11, and the other end is slidably connected to the transfer sleeve 13. The first magnetic sleeve 14 is coaxially connected to the positioning center roller 9. Figure 6 and Figure 7The first magnetic sleeve 14 is fixedly connected to the end of the driving screw sleeve 10 away from the driven gear 8, the second magnetic sleeve 15 is arranged at the end of the first magnetic sleeve 14 away from the driving screw sleeve 10, the second magnetic sleeve 15 is coaxially connected to the positioning center roller 9, the second magnetic sleeve 15 is connected to the first magnetic sleeve 14 through magnetic transmission, the second magnetic sleeve 15 is fixedly connected to the adapter sleeve 13, the power toothed disc 16 is coaxially connected to the adapter sleeve 13, the power gear 17 is meshed with the power toothed disc 16 and is connected to the positioning and tightening mechanism 18, reference Figure 4 When the driven gear 8 rotates and drives the driving screw sleeve 10 to rotate, in the stage where the tightening support rod 20 drives the tightening gasket 21 to move, because the tightening support rod 20 has not reached the limit position, the power toothed disc 16 will continue to rotate, that is, when the corresponding driving screw sleeve 10 rotates, the driving screw sleeve 10 will drive the second magnetic sleeve 15 to rotate through the first magnetic sleeve 14, and the second magnetic sleeve 15 will drive the power toothed disc 16 to rotate through the adapter sleeve 13, and because the adapter sleeve 13 and the movable screw seat 11 keep rotating synchronously at this time, the movable screw seat 11 cannot have relative displacement with the driving screw sleeve 10.

[0047] When the support rod 20 drives the support gasket 21 to press against the inner wall of the pipe, Figure 2 , the power gear disc 16 cannot continue to rotate, and the corresponding adapter sleeve 13 stops rotating. However, since the first magnetic sleeve 14 and the second magnetic sleeve 15 are connected by magnetic transmission, the drive screw sleeve 10 fixedly connected to the first magnetic sleeve 14 will continue to rotate. However, at this time, the movable screw seat 11 is limited by a number of adapter pins 12. The continued rotation of the drive screw sleeve 10 will drive the movable screw seat 11 to move toward the direction close to the positioning chuck 4 until the movable chuck 5 pushes the rubber gasket 6 to deform and makes the deformed rubber gasket 6 press against the inner wall of the pipe.

[0048] In order to supplement the specific structure of the positioning and tightening mechanism 18, the following features are also specifically provided:

[0049] The positioning and tightening mechanism 18 also includes a positioning frame 19, a center disk 22, a center gear disk 25, a driving gear 26, a transfer disk 27 and a plurality of limit pins 24. The positioning frame 19 is coaxially connected to the positioning center roller 9. Figure 4 , a plurality of support rods 20 are slidably connected to the positioning frame 19, refer to Fig. 9 and Fig.10The center toothed disc 25 is rotatably connected to the side of the positioning frame 19 close to the power toothed disc 16, the center disc 22 is coaxially fixedly connected to the center toothed disc 25, the center disc 22 is formed with a plurality of limit arc grooves 23 at equal angles along the circumferential direction, a plurality of limit pins 24 are respectively slidably connected to the plurality of limit arc grooves 23, a plurality of limit pins 24 are respectively fixedly connected to a plurality of tightening support rods 20, a driving gear 26 is rotatably connected to the positioning frame 19 and meshes with the center toothed disc 25, a transfer disc 27 is arranged on the side of the center disc 22 away from the positioning frame 19 and is fixedly connected to the positioning center roller 9, the power toothed disc 16 is coaxially rotatably connected to the transfer disc 27, reference Figure 7 The power gear 17 is rotatably connected to the adapter disc 27 and is coaxially fixed to the driving gear 26. When the power toothed disc 16 rotates, the power toothed disc 16 drives the driving gear 26 to rotate through the power gear 17, and the driving gear 26 drives the center disc 22 to rotate through the center toothed disc 25. When the center disc 22 rotates, it drives the support rod 20 to move through the cooperation of the limit arc groove 23 and the limit pin 24.

[0050] In order to ensure that the support rod 20 does not reset itself when moving toward the inner wall of the tube, the following features are also provided:

[0051] The anti-reversal mechanism 28 also includes a positioning disc frame 29, a tightening ratchet 30, a pawl 31, a tightening spring 32 and a first pad 33. The positioning disc frame 29 is fixedly connected to the side of the transfer disc 27 away from the positioning frame 19. Fig. 9 The ratchet wheel 30 is coaxially connected to the power gear 17, the pawl 31 is tightly pressed against the outer edge of the ratchet wheel 30, and the spring 32 is sleeved on the outside of the pawl 31. Fig.12 The first pad 33 is fixedly connected to the positioning disc frame 29, the end of the pawl 31 away from the pressing ratchet 30 is slidably connected to the first pad 33, one end of the pressing spring 32 is fixedly connected to the pawl 31, and the other end is fixedly connected to the first pad 33. When the power gear 17 rotates, the power gear 17 drives the pressing ratchet 30 to rotate, and the pressing ratchet 30 is limited by the pawl 31 when rotating, and the pawl 31 is always pressed against the pressing ratchet 30 under the action of the pressing spring 32.

[0052] In order to supplement the specific structure of the anti-reverse mechanism 28, the following features are also specifically provided:

[0053] The anti-reversal mechanism 28 also includes a transfer pad 34, a transfer roller 35, a push inclined block 36, a reset tension spring 37, a reset rack 38 and a second pad 41. The transfer pad 34 is slidably connected to the positioning disc frame 29. Fig.12 One end of the transfer pad 34 is fixedly connected to the ratchet 31, and the other end is rotatably connected to the transfer roller 35. The push inclined block 36 is slidably arranged on the upper end of the transfer roller 35. Fig.13The lower end of the push inclined block 36 abuts against the transfer roller 35, one end of the reset tension spring 37 is fixedly connected to the push inclined block 36, and the other end is fixedly connected to the second pad 41, the second pad 41 is fixedly connected to the positioning disc frame 29, and the reset rack 38 is fixedly connected to the push inclined block 36. When it is necessary to drive the pawl 31 and the pressing ratchet 30 to separate, the push inclined block 36 will move, and the push inclined block 36 will drive the transfer roller 35 to move in the direction close to the axis of the positioning disc frame 29. At this time, the transfer pad 34 rotatably connected to the transfer roller 35 will drive the pawl 31 and the pressing ratchet 30 to separate, thereby ensuring that the pressing ratchet 30 can be reset.

[0054] In order to achieve the displacement of the reset rack 38, the following features are also specifically provided:

[0055] The anti-reversal mechanism 28 further includes a positioning tooth seat 42, a transfer gear ring 43, a transfer gear 44 and a reset gear 46. The positioning tooth seat 42 is coaxially connected to the positioning disc frame 29. Fig. 9 and Fig.11 The transfer gear ring 43 is coaxially connected to the positioning gear seat 42 and is fixedly connected to the transfer sleeve 13. The transfer gear 44 is connected to the positioning gear seat 42 and meshes with the transfer gear ring 43. The reset gear 46 is connected to the positioning disc frame 29 and meshes with the reset rack 38. The reset gear 46 and the transfer gear 44 are connected by a one-way ratchet 45. Fig.13 In the stage where the tensioning support rod 20 drives the tensioning gasket 21 to move, in order to prevent the reset gear 46 from rotating and causing the reset rack 38 to have unnecessary displacement, at this time, reference Fig.13 , the inner ring and outer ring of the one-way ratchet 45 are relatively displaced, and the transfer gear 44 cannot rotate through the one-way ratchet 45 to drive the reset gear 46 to rotate. When the device needs to be removed from the pipeline, the driving screw sleeve 10 rotates in the opposite direction. At this time, the first magnetic sleeve 14 and the second magnetic sleeve 15 will be transmitted through magnetic force, and the rotation of the second magnetic sleeve 15 will drive the transfer gear ring 43 to rotate through the transfer sleeve 13, and the transfer gear ring 43 will drive the reset gear 46 to rotate through the transfer gear 44. At this time, the inner ring and outer ring of the one-way ratchet 45 rotate synchronously, and the transfer gear 44 can drive the reset gear 46 to rotate through the one-way ratchet 45, and the reset gear 46 will drive the reset rack 38 meshing with it to move after rotating.

[0056] In order to limit the movement range of the reset rack 38, the following features are also specifically provided:

[0057] The anti-reverse mechanism 28 also includes a buffer tooth block 39 and a buffer spring 40, Fig.13One end of the buffer spring 40 is fixedly connected to the end of the reset rack 38 away from the transfer pad 34, and the buffer tooth block 39 is fixedly connected to the other end of the buffer spring 40, and the buffer tooth block 39 can mesh with the reset gear 46. When the reset rack 38 moves to the point where the buffer tooth block 39 abuts against the reset gear 46, the reset tension spring 37 cannot continue to extend because the reset rack 38 moves to the limit position, and the reset gear 46 abuts against the buffer tooth block 39. At this time, the buffer spring 40 can achieve repeated meshing of the reset gear 46 and the buffer tooth block 39, thereby limiting the movement range of the reset rack 38.

[0058] In order to prevent the movement of the pawl 31 and the ratchet wheel 30 moving away from each other when the adapter sleeve 13 rotates, and the movement of the power toothed disc 16 rotating, the following features are specifically provided:

[0059] The anti-reversal mechanism 28 also includes a buffer sleeve 47 and two buffer pins 49. The buffer sleeve 47 is coaxially connected to the power gear plate 16 for rotation. Figure 6 and Figure 8 The buffer sleeve 47 is coaxially fixedly connected to the adapter sleeve 13, two buffer pins 49 are arranged along the circumferential direction of the power gear disc 16 and are fixedly connected to the power gear disc 16, and the buffer sleeve 47 is formed with a buffer flange 48 along the circumferential direction, and the buffer flange 48 can respectively abut against the two buffer pins 49. When the adapter sleeve 13 rotates, the adapter sleeve 13 will rotate through the buffer sleeve 47, and when the buffer flange 48 abuts against a buffer pin 49, the power gear disc 16 will rotate synchronously with the adapter sleeve 13, that is, the power gear disc 16 will always rotate later than the adapter sleeve 13, thereby avoiding the mutual interference between the pawl 31 and the abutting ratchet 30 caused by the power gear disc 16 driving the power gear 17 to rotate when the reset gear 46 drives the pawl 31 to move through the reset rack 38.

[0060] The working principle of the device is that when the device is in operation, the operator inserts the positioning cylinder frame 1 into the pipeline along the pipeline axis direction, and then starts the motor 2.

[0061] After the motor 2 is started, it will drive the driving screw sleeve 10 to rotate through the driven gear 8. During the stage when the tightening support rod 20 drives the tightening gasket 21 to move, because the tightening support rod 20 has not reached the limit position, the power toothed disc 16 will continue to rotate, that is, when the corresponding driving screw sleeve 10 rotates, the driving screw sleeve 10 will drive the second magnetic sleeve 15 to rotate through the first magnetic sleeve 14, and the second magnetic sleeve 15 will drive the power toothed disc 16 to rotate through the adapter sleeve 13. At this time, because the adapter sleeve 13 and the movable screw seat 11 keep rotating synchronously, the movable screw seat 11 cannot have relative displacement with the driving screw sleeve 10.

[0062] When the support rod 20 drives the support gasket 21 to press against the inner wall of the pipe, the power gear disc 16 cannot continue to rotate, and the corresponding adapter sleeve 13 stops rotating. Since the first magnetic sleeve 14 and the second magnetic sleeve 15 are connected by magnetic transmission, the drive screw sleeve 10 fixedly connected to the first magnetic sleeve 14 will continue to rotate. However, at this time, the movable screw seat 11 is limited by a number of adapter pins 12, and the continued rotation of the drive screw sleeve 10 will drive the movable screw seat 11 to move in the direction close to the positioning chuck 4, until the movable chuck 5 pushes the rubber gasket 6 to deform and makes the deformed rubber gasket 6 press against the inner wall of the pipe, thereby realizing temporary blocking of the pipe.

[0063] When the device is disassembled, the motor 2 drives the driving screw sleeve 10 to reverse. At this time, the first magnetic sleeve 14 and the second magnetic sleeve 15 will be transmitted through magnetic force, and the rotation of the second magnetic sleeve 15 will drive the transfer ring gear 43 to rotate through the transfer sleeve 13, and the transfer ring gear 43 will drive the reset gear 46 to rotate through the transfer gear 44. At this time, the inner ring and the outer ring of the one-way ratchet 45 rotate synchronously, and the transfer gear 44 can drive the reset gear 46 to rotate through the one-way ratchet 45. After the reset gear 46 rotates, it will drive the reset rack 38 meshing with it to move. After the reset rack 38 moves, the pawl 31 and the tightening ratchet 30 will be separated, ensuring that a number of tightening support rods 20 can drive the corresponding tightening gaskets 21 to separate from the inner wall of the pipeline. During this process, the power toothed disc 16 will rotate synchronously with the adapter sleeve 13 only when the buffer flange 48 abuts against a buffer pin 49, that is, the power toothed disc 16 will always rotate later than the adapter sleeve 13, thereby preventing the pawl 31 and the abutting ratchet wheel 30 from interfering with each other due to the power toothed disc 16 driving the power gear 17 to rotate when the reset gear 46 drives the pawl 31 to move through the reset rack 38. When the device is in use, the motor 2 needs to be waterproofed.

[0064] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A temporary plugging device for pipeline maintenance, characterized in that: include: Positioning cylinder holder (1), A motor (2) is fixedly connected to one end of the positioning cylinder frame (1); The blocking mechanism (3) is connected to the positioning cartridge frame (1), and comprises a positioning chuck (4), a movable chuck (5) and a rubber gasket (6); the positioning chuck (4) is fixedly connected to one end of the positioning cartridge frame (1) away from the motor (2); the rubber gasket (6) is coaxially arranged on a side of the positioning chuck (4) away from the positioning cartridge frame (1); one side of the rubber gasket (6) is fixedly connected to the positioning chuck (4); the movable chuck (5) is coaxially arranged on a side of the rubber gasket (6) away from the positioning chuck (4); and the other side of the movable chuck (5) abuts against the rubber gasket (6); The positioning and tightening mechanism (18) is arranged on a side of the movable chuck (5) away from the rubber gasket (6), and comprises a plurality of tightening support rods (20) and a plurality of tightening washers (21). The plurality of tightening support rods (20) are arranged in an array at equal angles along the circumferential direction of the positioning cylinder frame (1), and the plurality of tightening washers (21) are respectively fixedly connected to the plurality of tightening support rods (20); An anti-reversal mechanism (28) is arranged on a side of the movable clamping plate (5) close to the plurality of tightening support rods (20) and ensures that the plurality of tightening support rods (20) can move in one direction; The plugging mechanism (3) further comprises a driving gear (7), a driven gear (8), a positioning center roller (9) and a driving screw sleeve (10); the driving gear (7) is rotationally connected to the positioning cylinder frame (1) and is coaxially fixedly connected to the output end of the motor (2); the driven gear (8) is meshed with the driving gear (7) and is rotationally connected to the positioning cylinder frame (1) coaxially; the positioning center roller (9) is coaxially fixedly connected to the positioning cylinder frame (1); the driving screw sleeve (10) is rotationally connected to the positioning center roller (9) coaxially; and the driving screw sleeve (10) is coaxially fixedly connected to the driven gear (8); The plugging mechanism (3) further comprises a movable screw seat (11), a transfer sleeve (13), a first magnetic sleeve (14), a second magnetic sleeve (15), a power toothed disc (16), a power gear (17) and a plurality of transfer pins (12); the movable screw seat (11) is coaxially fixedly connected to the movable chuck (5); the movable screw seat (11) is threadedly connected to the drive screw sleeve (10); the plurality of transfer pins (12) are arranged in an array at equal angles along the circumferential direction of the movable screw seat (11); one end of the transfer pin (12) is fixedly connected to the movable screw seat (11) and the other end is slidably connected to the transfer sleeve (13); the first magnetic sleeve (14) is connected to the positioning center roller (9 ) are coaxially rotatably connected, the first magnetic sleeve (14) is fixedly connected to one end of the driving screw sleeve (10) away from the driven gear (8), the second magnetic sleeve (15) is arranged at one end of the first magnetic sleeve (14) away from the driving screw sleeve (10), the second magnetic sleeve (15) is coaxially rotatably connected to the positioning center roller (9), the second magnetic sleeve (15) is connected to the first magnetic sleeve (14) through magnetic transmission, the second magnetic sleeve (15) is fixedly connected to the adapter sleeve (13), the power toothed disc (16) is coaxially transmission-connected to the adapter sleeve (13), and the power gear (17) is meshed with the power toothed disc (16) and is transmission-connected to the positioning and tightening mechanism (18); The positioning and tightening mechanism (18) further comprises a positioning frame (19), a center disc (22), a center toothed disc (25), a driving gear (26), a transfer disc (27) and a plurality of limit pins (24); the positioning frame (19) is coaxially fixedly connected to the positioning center roller (9); a plurality of tightening support rods (20) are slidably connected to the positioning frame (19); the center toothed disc (25) is rotatably connected to a side of the positioning frame (19) close to the power toothed disc (16); the center disc (22) is coaxially fixedly connected to the center toothed disc (25); and the center disc (22) is formed with a plurality of limit arc grooves (24) at equal angles along the circumferential direction. 23), a plurality of limit pins (24) are respectively slidably connected to a plurality of limit arc grooves (23), a plurality of limit pins (24) are respectively fixedly connected to a plurality of tightening support rods (20), a driving gear (26) is rotatably connected to the positioning frame (19) and meshes with the center gear disc (25), a transfer disc (27) is arranged on a side of the center disc (22) away from the positioning frame (19) and is fixedly connected to the positioning center roller (9), a power gear disc (16) is rotatably connected to the transfer disc (27) coaxially, and a power gear (17) is rotatably connected to the transfer disc (27) and is fixedly connected coaxially to the driving gear (26); The anti-reversal mechanism (28) further comprises a positioning disc frame (29), a pressing ratchet wheel (30), a pawl (31), a pressing spring (32) and a first pad (33). The positioning disc frame (29) is fixedly connected to a side of the transfer disc (27) away from the positioning frame (19). The pressing ratchet wheel (30) is fixedly connected to the power gear (17) coaxially. The pawl (31) is pressed against an outer edge of the pressing ratchet wheel (30). The pressing spring (32) is sleeved on the outside of the pawl (31). The first pad (33) is fixedly connected to the positioning disc frame (29). One end of the pawl (31) away from the pressing ratchet wheel (30) is slidably connected to the first pad (33). One end of the pressing spring (32) is fixedly connected to the pawl (31) and the other end is fixedly connected to the first pad (33).

2. The temporary plugging device for pipeline maintenance according to claim 1, characterized in that: The anti-reversal mechanism (28) further comprises a transfer pad (34), a transfer roller (35), a push inclined block (36), a reset tension spring (37), a reset rack (38) and a second pad (41); the transfer pad (34) is slidably connected to the positioning disc frame (29); one end of the transfer pad (34) is fixedly connected to the ratchet (31) and the other end is rotationally connected to the transfer roller (35); the push inclined block (36) is slidably arranged on the upper end of the transfer roller (35); the lower end of the push inclined block (36) abuts against the transfer roller (35); one end of the reset tension spring (37) is fixedly connected to the push inclined block (36) and the other end is fixedly connected to the second pad (41); the second pad (41) is fixedly connected to the positioning disc frame (29); and the reset rack (38) is fixedly connected to the push inclined block (36).

3. The temporary plugging device for pipeline maintenance according to claim 2, characterized in that: The anti-reversal mechanism (28) further comprises a positioning tooth seat (42), a transfer gear ring (43), a transfer gear (44) and a reset gear (46); the positioning tooth seat (42) is fixedly connected coaxially with the positioning disc frame (29); the transfer gear ring (43) is rotationally connected coaxially with the positioning tooth seat (42) and is fixedly connected to the transfer sleeve (13); the transfer gear (44) is rotationally connected to the positioning tooth seat (42) and meshes with the transfer gear ring (43); the reset gear (46) is rotationally connected to the positioning disc frame (29) and meshes with the reset rack (38); and the reset gear (46) and the transfer gear (44) are transmission-connected via a one-way ratchet (45).

4. The temporary plugging device for pipeline maintenance according to claim 3, characterized in that: The anti-reversal mechanism (28) further comprises a buffer tooth block (39) and a buffer spring (40), one end of the buffer spring (40) being fixedly connected to an end of the reset rack (38) away from the transfer pad (34), the buffer tooth block (39) being fixedly connected to the other end of the buffer spring (40), and the buffer tooth block (39) being able to mesh with the reset gear (46).

5. The temporary plugging device for pipeline maintenance according to claim 4, characterized in that: The anti-reversal mechanism (28) further comprises a buffer sleeve (47) and two buffer pins (49); the buffer sleeve (47) is coaxially rotatably connected to the power gear disc (16); the buffer sleeve (47) is coaxially fixedly connected to the adapter sleeve (13); the two buffer pins (49) are arranged along the circumferential direction of the power gear disc (16) and are fixedly connected to the power gear disc (16); the buffer sleeve (47) is formed with a buffer flange (48) along the circumferential direction; the buffer flange (48) can respectively abut against the two buffer pins (49).

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