CN114951827B - Pipeline internal cutting device based on internal planetary gear train - Google Patents
Pipeline internal cutting device based on internal planetary gear train Download PDFInfo
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- CN114951827B CN114951827B CN202210553216.5A CN202210553216A CN114951827B CN 114951827 B CN114951827 B CN 114951827B CN 202210553216 A CN202210553216 A CN 202210553216A CN 114951827 B CN114951827 B CN 114951827B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 67
- 230000005540 biological transmission Effects 0.000 claims abstract description 42
- 238000009434 installation Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 101000793686 Homo sapiens Azurocidin Proteins 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/064—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding elongated workpieces, e.g. pipes, bars or profiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/28—Electric drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
- B26D1/157—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis
- B26D1/18—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable carriage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/16—Cutting rods or tubes transversely
- B26D3/163—Cutting tubes from the inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/08—Means for actuating the cutting member to effect the cut
- B26D5/086—Electric, magnetic, piezoelectric, electro-magnetic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Retarders (AREA)
Abstract
The invention provides an in-pipeline cutting device based on an inner planetary gear train, which comprises a fixing frame mechanism, a circumferential feeding mechanism, an inner meshing planetary gear train transmission mechanism, a cutting tool mechanism and a control mechanism, wherein the fixing frame mechanism, the circumferential feeding mechanism, the inner meshing planetary gear train transmission mechanism and the cutting tool mechanism are arranged in a fixing frame body in the fixing frame mechanism, the inner meshing planetary gear train transmission mechanism is arranged in a cavity of a driving shaft in the circumferential feeding mechanism, the cutting tool mechanism is fixed on the end face of a cylindrical gear in the inner meshing planetary gear train transmission mechanism, and the control mechanism controls motors in the circumferential feeding mechanism, the inner meshing planetary gear train transmission mechanism and the cutting tool mechanism to drive a cutting tool to cut the pipeline. The invention adopts the internal meshing planetary gear train structure, solves the technical problem of huge volume in the prior art, effectively improves the space utilization rate of the pipeline, widens the application range and can prolong the service life of the equipment.
Description
Technical Field
The invention belongs to the technical field of industrial pipeline processing, relates to an in-pipeline cutting device, and in particular relates to a closed pipeline in-pipeline cutting device capable of realizing autorotation and radial expansion based on an inner meshing planetary gear train, which can be used in the field of petrochemical industry.
Background
When the circular pipeline is affected by the working conditions such as medium corrosion, fluid impact and the like and has faults such as wall surface damage, cracks, pitting corrosion and the like, in order to avoid replacing the whole pipeline or detaching the whole pipeline, the pipeline is mostly maintained by cutting the fault part of the pipeline in an internal cutting mode, so that the maintenance efficiency can be improved and the cost can be reduced. When a small-caliber pipeline is cut in, the existing equipment is difficult to be suitable for small-caliber processing due to the huge volume of the existing equipment; in addition, the existing equipment only has a single motor, so that the rotating speed can not be well regulated to cope with the condition that the conditions such as pipeline materials and wall thickness are changed.
The existing pipeline internal cutting equipment can finish the internal cutting operation of part of pipelines, but because the internal space of the pipelines is limited, the existing internal cutting equipment is complex in design, and the whole structure is huge, for example, the application publication number is CN 112247247A, and the patent application is named as an instrument for cutting from the interior of the pipelines, which discloses an internal cutting instrument for the pipelines, wherein the internal cutting instrument is in a regular triangle, and the cutting operation mode is a flexible cutting mode in which two electromagnets are used for adjusting cutters and converting cutting operation and buffering springs through bevel gear transmission; the invention can cut from the inside of the pipeline, but for the purpose of protecting the cutter, two mechanical devices for controlling mode conversion by the magnet are adopted, and the invention is limited to a special installation mode of the bevel gear, and the complex structural design not only causes huge volume of the whole instrument, but also limits the space utilization rate in the pipeline, and finally influences the engineering applicability of the whole instrument; meanwhile, if the bevel gear is uncomfortable to assemble, the service life of the device is reduced.
Disclosure of Invention
The invention aims to solve the defects of the existing circular pipe internal cutting technology, provides an internal planetary gear train-based internal cutting device for a pipe, and aims to solve the technical problem that the prior art is only suitable for internal cutting of a small-caliber pipe due to huge volume.
In order to achieve the above purpose, the technical scheme adopted by the invention comprises a fixing frame mechanism 1, a circumferential feeding mechanism 2, an internal meshing planetary gear train transmission mechanism 3, a cutting tool mechanism 4 and a control mechanism, wherein the fixing frame mechanism 1, the circumferential feeding mechanism 2, the internal meshing planetary gear train transmission mechanism 3 and the control mechanism are arranged in a pipeline to be cut, and the control mechanism comprises the following components:
the fixing frame mechanism 1 comprises a hollow cylindrical fixing frame body 11 with a stepped boss on the inner wall, a front end cover 12 with a circular hole in the center of a cover plate and a rear end cover 13;
the circumferential feeding mechanism 2 comprises a circumferential feeding motor 21 arranged in a cavity of the fixed frame body 11 and fixed on the rear end cover 13, and a driving shaft 23 supported on the axis of the fixed frame body 11 through a pair of first bearings 22 and connected with a transmission shaft of the circumferential feeding motor 21, wherein the front end of the driving shaft 23 is provided with a mounting cavity positioned on the central axis of the driving shaft; the circumferential feeding motor 21 drives the driving shaft 23 to rotate relative to the fixed frame 11;
the internal meshing planetary gear train transmission mechanism 3 comprises a gear driving motor 31, a gear driving crank shaft 32, a cylindrical gear 33 and a gear frame 34; the gear driving motor 31 is fixed in the installation cavity of the driving shaft 23; the main journal of the gear drive crankshaft 32 is connected with the output shaft of the gear drive motor 31; the cylindrical gear 33 is fixed on the connecting rod journal of the gear transmission crankshaft 32; the outer ring of the gear rack 34 is fixed with the driving shaft 23, and the inner teeth are meshed with the cylindrical gear 33; the gear driving motor 31 drives the cylindrical gear 33 and the gear rack 34 to rotate relatively through the gear transmission crank shaft 32;
the cutting tool mechanism 4 comprises a tool driving motor 41 fixed at the rear end of the cylindrical gear 33, a tool frame 42 connected with the output shaft of the tool driving motor 41, and a disc-shaped cutting tool 43 fixed on the tool frame 42; the cutter driving motor 41 drives the cutting cutter 43 to rotate relative to the cylindrical gear 33, so that the cutting of the pipeline is realized;
the radius of the cutting tool 43 and the radius of the crank of the gear transmission crank shaft 32 are added together to be larger than the radius of the fixed frame 11;
the control mechanism is for controlling the circumferential feed motor 21, the internal gear drive motor 31, and the cutter drive motor 41.
In the above-mentioned cutting device in the pipeline, the central axis of the transmission shafts of the feeding motor 21 and the internal gear driving motor 31 in the circumferential direction, and the central axis of the gear rack 34 are coincident with the central axis of the fixed rack body 11; the central axis of the transmission shaft of the cutter driving motor 41 is parallel to the central axis of the fixed frame 11.
In the above-mentioned cutting device in a pipeline, the circumferential feeding mechanism 2 comprises a pair of first bearings 22 supported by a sleeve, wherein the bearing near the rear end is fixed to a stepped boss provided on the inner wall of the fixed frame 11 by a bearing cover.
In the above-mentioned pipe internal cutting device, the rotation speed ratio of the circumferential feed motor 21 and the internal gear driving motor 31 is determined by the transmission ratio of the cylindrical gear 33 and the gear rack 34, and when the transmission ratio of the cylindrical gear 33 and the gear rack 34 is 1:2, the rotation speed ratio of the circumferential feed motor 21 and the internal gear driving motor 31 is 3:2.
Compared with the prior art, the invention has the following advantages:
1. according to the internal cutting device, the gear transmission crankshaft in the internal meshing planetary gear train transmission mechanism drives the cylindrical gear to rotate relative to the gear frame, the cutting tool in the cutting tool mechanism rotates relative to the cylindrical gear, internal cutting of the pipeline is completed by utilizing the characteristic that the movement track of the cylindrical gear is changeable under different transmission ratios, the defects that internal cutting is realized through two magnet control mode conversion and huge volume is caused by bevel gear transmission in the prior art are avoided, internal cutting of pipelines with different diameters can be realized, the space utilization rate in the pipeline is effectively improved, and the application range of the cutting device is widened.
2. According to the invention, the rotation speeds of the circumferential feed motor and the internal gear driving motor are controlled by the control mechanism to control the cutting path of the axis of the cutter, so that the internal cutting work under different pipe diameters is dealt with; the rotating speed of the cutting tool is controlled by controlling the rotating speed of the tool driving motor, so that the working force is controlled, and the three motors are matched with each other, so that the internal cutting work of pipelines made of different materials can be dealt with, and the applicability of the cutting device under different working conditions is effectively improved.
3. The internal meshing planetary gear train transmission mechanism adopted by the invention has compact structure, stable operation and easy manufacturing and installation, and avoids the defect that the service life of the device is possibly reduced due to the uncomfortableness of bevel gear assembly in the prior art.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the fixing frame mechanism of the present invention.
Fig. 3 is a schematic structural view of the circumferential feeding mechanism of the present invention.
Fig. 4 is a schematic structural view of a transmission shaft according to the present invention.
FIG. 5 is a schematic diagram of the internal meshing planetary gear train transmission mechanism of the present invention.
Fig. 6 is a schematic structural view of a gear driven crank shaft according to the present invention.
FIG. 7 is a schematic view of the cutting tool mechanism of the present invention.
Fig. 8 is an elliptical trajectory of the axis of the cutting tool of the present invention.
FIG. 9 is a helical-like trajectory of the axis of the cutting tool of the present invention.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and to specific embodiments:
the invention comprises a mechanical part and a control mechanism, wherein the structure of the mechanical part is shown in figure 1, and the mechanical part comprises a fixing frame mechanism 1, a circumferential feeding mechanism 2, an internal meshing planetary gear train transmission mechanism 3 and a cutting tool mechanism 4 which are arranged in a pipeline to be cut.
Referring to fig. 2, the fixing frame mechanism 1 includes a hollow cylindrical fixing frame body 11 with a stepped boss on an inner wall, a front end cover 12 with a circular hole in a center of a cover plate, and a rear end cover 13;
the boss near the front end of the fixing frame body 11 is used for supporting the first bearing 22, and the boss near the rear end is provided with 6 uniformly distributed threaded holes and 2 asymmetric pin holes for installing and positioning the circumferential mechanism end cover 25;
the outer diameters of the front end cover 12 and the rear end cover 13 are equal to the outer diameter of the fixing frame body 11.
Referring to fig. 3, the circumferential feed mechanism 2 includes a circumferential feed motor 21 disposed in a cavity of the fixing frame 11 and fixed on the rear end cover 13, a driving shaft 23 supported on an axis of the fixing frame 11 by a pair of first bearings 22, an electrically conductive slip ring 24, and a circumferential mechanism end cover 25; the front end of the driving shaft 23 is provided with a mounting cavity on the central axis thereof; the circumferential feeding motor 21 drives the driving shaft 23 to rotate relative to the fixed frame 11;
the structure of the driving shaft 23 is shown in fig. 4, and the driving shaft comprises a motor connecting shaft section 231, a conductive sliding ring shaft section 232, a hollow hole 233, a motor cavity 234, an end cover boss 235, a bearing shaft shoulder 236, a bolt shaft shoulder 237 and a gear rack cavity 238; the motor connecting shaft section 231 is connected with a motor through a coupler; the conductive slip ring shaft section 232 is provided with a conductive slip ring 24; the hollow hole 233 is a line passing channel of the conductive slip ring, and is a T-shaped cylindrical channel, and the axes of the drive shaft 23 and the conductive slip ring 24 are respectively overlapped; an internal gear driving motor 31 is installed at the motor cavity 234; the end cover boss 235 is used for installing the planetary gear train end cover 37, and the inner diameter of the end cover boss is not smaller than the diameter of the motor cavity 234; the bearing shoulder 236 is used for supporting the first bearing 22, and the height of the bearing shoulder must not be higher than the height of the bearing inner ring; the bolt shaft shoulder 237 is used for installing a bolt for fixing the gear frame; the carrier cavity 238 mates with the outer race of the carrier 34;
the conductive slip ring 24 has a ring-shaped structure and is positioned on a conductive slip ring shaft section 232 of the driving shaft 23; the outer side of the conductive slip ring 24 is connected with a static power transmission line, and the inner side of the conductive slip ring is connected with a rotating driving shaft 23, so that dynamic and static conversion of the electric wire is realized; the wire is connected with the internal gear driving motor 31 in the cavity of the driving shaft 23 through the hollow hole 233 of the driving shaft 23;
the circumferential mechanism end cap 25 includes an end cap body 251, a threaded hole 252, and a dowel hole 253; the end cover is positioned on the second boss of the fixed frame body 11 and is coaxial with the second boss, so that the fixed installation function is realized; meanwhile, 3-6 threaded through holes which are uniformly distributed can be selected according to the actual size on the end face of the circumferential mechanism end cover 25, the number of the threaded through holes is 6 in this example, and two positioning pin holes which are asymmetric compared with the diameter direction are also formed in the end face and are used for positioning the circumferential mechanism end cover 25; and a sealing ring is arranged at the joint of the circumferential mechanism end cover 25 and the driving shaft 23.
Referring to fig. 5, the internal meshing planetary gear train transmission mechanism 3 includes a gear drive motor 31, a gear drive crank shaft 32, a cylindrical gear 33, a gear carrier 34, a second bearing 35, a cup 36, a planetary gear train end cover 37, a connecting rod journal bearing 38, and a cylindrical gear end cover 39; the gear driving motor 31 drives the cylindrical gear 33 and the gear rack 34 to rotate relatively through the gear transmission crank shaft 32;
the gear driving motor 31 is fixed in the installation cavity of the driving shaft 23; the outer ring of the gear rack 34 is fixed with the driving shaft 23, and the inner teeth of the gear rack are meshed with the cylindrical gear 33;
the gear drive crankshaft 32 has a structure as shown in fig. 6, and comprises a main journal 321, a connecting rod journal 322 and a crank 323, wherein the main journal 321 is connected with an output shaft of the gear drive motor 31; the cylindrical gear 33 is fixedly mounted on the connecting rod journal of the gear drive crankshaft 322 by the support of the connecting rod journal bearing 38 and the cylindrical gear end cap 39; the crank 323 serves to transmit torque;
the gear rack 34 is in threaded connection with the driving shaft 23, and the process is as follows: the inner hole of the driving shaft 23 and the outer ring of the gear rack 34 are assembled according to the design requirement, and then the matched seam is drilled and tapped, and then the bolts are used for installation.
The second bearing 35 supports the gear drive crank shaft 32 and is arranged in the sleeve cup 36, an oblong sleeve pair is arranged between the bearings, the outer diameter of the sleeve pair is not larger than the inner diameter of the second bearing 35, and the inner diameter is smaller than the outer diameter of the second bearing 35;
the sleeve cup 36 has the function of combining and installing the second bearing 35 and the sleeve pair, so that subsequent lubrication and installation are facilitated;
the planetary gear train end cap 37 is bolted to the end cap boss 235 of the drive shaft 23, the top end of which abuts the outer diameter of the second bearing 35.
Referring to fig. 7, the cutter mechanism 4 includes a cutter driving motor 41, a cutter frame 42, a cutter 43, and a third bearing 44; the cutter driving motor 41 drives the cutting cutter 43 to rotate relative to the cylindrical gear 33, so that the cutting of the pipeline is realized;
the cutter driving motor 41 is fixed at the rear end of the cylindrical gear 33 and provides power for the cutting cutter;
the cutter frame 42 is connected with the output shaft of the cutter driving motor 41 and is arranged in the cavity of the cylindrical gear 33 through the support of the third bearing 44;
the cutting tool 43 is in a disc-shaped structure and is fixed at the front end of the tool frame 42 through interference connection; and the sum of the radius of the cutting tool 43 and the radius of the crank of the gear transmission crank shaft 32 is larger than the radius of the fixed frame 11; while the cutting tool 43 is provided with a tool protection cover.
The central axes of the transmission shafts of the circumferential feed motor 21 and the internal gear driving motor 31, and the central axis of the gear rack 34 are coincident with the central axis of the fixed rack body 11; the central axis of the transmission shaft of the cutter driving motor 41 is parallel to the central axis of the fixed frame 11.
The rotation speed ratio of the circumferential feed motor 21 to the internal gear driving motor 31 is determined by the transmission ratio of the cylindrical gear 33 to the gear rack 34, and in this example, the transmission ratio of the cylindrical gear 33 to the gear rack 34 is 1:2, and the rotation speed ratio of the circumferential feed motor 21 to the internal gear driving motor 31 is 3:2.
The control mechanism of this example includes an equipment control unit PC end and a motion controller, and three motor drivers connected to the circumferential feed motor 21, the internal gear drive motor 31 and the cutter drive motor 41, when the transmission ratio of the cylindrical gear 33 and the gear frame 34 is 1:2, the rotational speeds of the corresponding circumferential feed motor 21 and internal gear drive motor 31 are 120r/min and 80r/min, respectively, the rotational speed of the cutter drive motor 41 is 1000r/min, and an instruction is sent to the motion controller through the PC end, and the motion controller sends pulse signals to the three drivers, respectively, and the drivers receive the pulse signals and drive different motors to rotate at corresponding rotational speeds.
The working principle of the invention is as follows: when the gear rack 34 is fixed and driven by the gear driving motor 31, the point track on the dividing circle of the cylindrical gear 33 is a diameter of the gear rack 34, and the axis track of the cutting tool 43 mounted on the cylindrical gear 33 is an elliptical track around the axis of the gear rack 34, as shown in fig. 8; when the driving shaft 23 fixed with the gear frame 34 is driven by the circumferential feeding motor 21 to rotate around the central axis of the fixed frame 11, the axial track of the cutting tool 43 installed on the cylindrical gear 33 is combined into a spiral-like track with both circumferential and radial expansion, as shown in fig. 9; at the same time, the cutter driving motor 41 drives the cutter disc surface of the cutter 43 to rotate about the axis of the cutter 43, thereby completing the inner cutting work.
Claims (4)
1. The utility model provides a cutting device in pipeline based on inner planetary gear train, its characterized in that, including setting up mount mechanism (1), circumference feed mechanism (2), inner gearing planetary gear train drive mechanism (3), cutting tool mechanism (4) in waiting to cut the pipeline to and control mechanism, wherein:
the fixing frame mechanism (1) comprises a hollow cylindrical fixing frame body (11) with a stepped boss on the inner wall, a front end cover (12) with a circular hole in the center of the cover plate and a rear end cover (13);
the circumferential feeding mechanism (2) comprises a circumferential feeding motor (21) arranged in a cavity of the fixed frame body (11) and fixed on the rear end cover (13), and a driving shaft (23) supported on the axis of the fixed frame body (11) through a pair of first bearings (22) and connected with a transmission shaft of the circumferential feeding motor (21), wherein the front end of the driving shaft (23) is provided with a mounting cavity positioned on the central axis of the driving shaft; the circumferential feeding motor (21) drives the driving shaft (23) to rotate relative to the fixed frame body (11);
the internal meshing planetary gear train transmission mechanism (3) comprises a gear driving motor (31), a gear driving crank shaft (32), a cylindrical gear (33) and a gear frame (34); the gear driving motor (31) is fixed in the mounting cavity of the driving shaft (23); the main journal of the gear transmission crankshaft (32) is connected with the output shaft of the gear driving motor (31); the cylindrical gear (33) is fixed on a connecting rod journal of a gear transmission crankshaft (32); an outer ring of the gear rack (34) is fixed with the driving shaft (23), and inner teeth are meshed with the cylindrical gear (33); the gear driving motor (31) drives the cylindrical gear (33) and the gear rack (34) to rotate relatively through the gear transmission crank shaft (32);
the cutting tool mechanism (4) comprises a tool driving motor (41) fixed at the rear end of the cylindrical gear (33), a tool frame (42) connected with an output shaft of the tool driving motor (41), and a disc-shaped cutting tool (43) fixed on the tool frame (42); the cutter driving motor (41) drives the cutting cutter (43) to rotate relative to the cylindrical gear (33) so as to cut the pipeline;
the sum of the radius of the cutting tool (43) and the radius of the crank of the gear transmission crank shaft (32) is larger than the radius of the fixed frame body (11);
the control mechanism is used for controlling the circumferential feed motor (21), the internal gear driving motor (31) and the cutter driving motor (41).
2. The in-pipe cutting apparatus based on an inner planetary gear train according to claim 1, wherein the center axes of the transmission shafts of the circumferential feed motor (21) and the inner gear drive motor (31), and the center axis of the gear carrier (34) coincide with the center axis of the mount body (11); the central axis of the transmission shaft of the cutter driving motor (41) is parallel to the central axis of the fixed frame body (11).
3. The inner planetary gear train-based in-pipe cutting apparatus according to claim 1, wherein the circumferential feeding mechanism (2) comprises a pair of first bearings (22) supported by a sleeve, wherein the bearing near the rear end is fixed to a stepped boss provided on the inner wall of the stationary frame body (11) by a bearing cap.
4. The in-pipe cutting apparatus based on an inner planetary gear train according to claim 1, wherein the rotation speed ratio of the circumferential feed motor (21) and the inner gear drive motor (31) is determined by the gear ratio of the spur gear (33) and the carrier (34), and when the gear ratio of the spur gear (33) and the carrier (34) is 1:2, the rotation speed ratio of the circumferential feed motor (21) and the inner gear drive motor (31) is 3:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210553216.5A CN114951827B (en) | 2022-05-19 | 2022-05-19 | Pipeline internal cutting device based on internal planetary gear train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210553216.5A CN114951827B (en) | 2022-05-19 | 2022-05-19 | Pipeline internal cutting device based on internal planetary gear train |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114951827A CN114951827A (en) | 2022-08-30 |
| CN114951827B true CN114951827B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210553216.5A Active CN114951827B (en) | 2022-05-19 | 2022-05-19 | Pipeline internal cutting device based on internal planetary gear train |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117532067A (en) * | 2023-12-17 | 2024-02-09 | 师艳芳 | Municipal road engineering pipeline cutting method |
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|---|---|---|---|---|
| EP0733434A2 (en) * | 1995-03-23 | 1996-09-25 | Honda Giken Kogyo Kabushiki Kaisha | Tool for cutting surface of workpiece in elliptic shape |
| CN202251792U (en) * | 2011-09-19 | 2012-05-30 | 中国农业大学 | Planetary gear box with double rotating blades |
| CN112427723A (en) * | 2020-10-12 | 2021-03-02 | 湖北工业大学 | Planetary continuous rotation pipe cutting device and pipe cutting method |
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2022
- 2022-05-19 CN CN202210553216.5A patent/CN114951827B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0733434A2 (en) * | 1995-03-23 | 1996-09-25 | Honda Giken Kogyo Kabushiki Kaisha | Tool for cutting surface of workpiece in elliptic shape |
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