Pipe penetrating device, pipe penetrating method and prepared cable harness

Abstract

The invention discloses a pipe penetrating device, a pipe penetrating method and a prepared cable harness, the pipe penetrating device comprises a pay-off module, a take-up module and a plurality of pipe penetrating modules, all the pipe penetrating modules are sequentially arranged between the pay-off module and the take-up module to form a pipe penetrating processing line; the pipe penetrating machining line is provided with a pipe penetrating channel matched with the core wire, and each pipe penetrating module comprises an excitation unit used for supplying energy for the core wire to move along the pipe penetrating channel. The pipe penetrating method is based on the pipe penetrating device, and the cable harness is manufactured through the pipe penetrating method. According to the pipe penetrating device, the pipe penetrating method and the prepared cable harness, distributed propelling power is provided through distributed layout of the pipe penetrating modules, end traction in the prior art is effectively replaced, insufficient power caused by end traction is avoided, and pipe penetrating processing of an ultra-long cable is achieved; the limitation of the material tensile strength on the pipe penetrating length is broken through.

Description

Technical Field

[0001] The invention relates to the field of cable pipe threading, and in particular to a pipe threading device, a pipe threading method and a prepared cable harness. Background Art

[0002] REBCO (Rare Earth Barium Copper Oxide) high-temperature superconducting tape has the characteristic of no DC resistance at low temperatures, and is an excellent material for manufacturing power and electrical equipment. However, REBCO high-temperature superconducting tape has severe anisotropy of mechanical properties and low shear stress resistance, and further tube armoring is required to improve the mechanical strength.

[0003] Since the length of a practical high-temperature superconducting cable needs to be hundreds to kilometers, and the diameter of a high-temperature superconducting cable is only a few millimeters, threading a pipe with an aspect ratio of more than 100,000 becomes a key technical difficulty. The existing traction threading technology applies traction to at least one of the two ends of the core wire to achieve threading, but when the core wire reaches a certain length, such as the high-temperature superconducting cable, the material strength itself is not enough to provide sufficient traction, and the existing traction threading technology is difficult to achieve threading. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing traction tube threading technology is difficult to achieve the tube threading of high-temperature superconducting cables. The purpose is to provide a tube threading device, a tube threading method and a prepared cable harness to solve the above technical problem.

[0005] The present invention is achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides a pipe threading device, comprising a wire-releasing module, a wire-receiving module and a plurality of pipe threading modules, wherein all the pipe threading modules are sequentially arranged between the wire-releasing module and the wire-receiving module to form a pipe threading processing line;

[0007] The pipe threading processing line is provided with a pipe threading channel adapted for the core wire, and each pipe threading module includes an excitation unit for providing energy for the core wire to move along the pipe threading channel.

[0008] In one possible design, the pipe threading processing line is constructed as a curve or a straight line. Accordingly, when the pipe threading processing line is constructed as a curve, the electromagnetic force provided by the excitation unit is tangent to the pipe threading channel, and when the pipe threading processing line is constructed as a straight line, the electromagnetic force provided by the excitation unit is parallel to the pipe threading channel.

[0009] In a possible design, a core wire is wound around the pay-off module, and one end of the core wire is configured to be able to penetrate the free end of the tube-threading module, and the core wire is made of non-magnetic conductive material, a detachable core sleeve is provided on the core wire, and a plurality of core sleeves are provided and arranged at intervals on the core wire, and the core sleeves are made of magnetic conductive material; a tube sleeve is provided outside the core wire, and the tube sleeve is hollow and used to penetrate the core wire;

[0010] Correspondingly, when the core wire is threaded through the tube, the tube sleeve passes through and is fixed by the tube threading module, the core wire is inserted into the tube sleeve, and the wire-releasing module follows to release the wire; after the core wire is threaded through the tube, the core sleeve is withdrawn, the core wire and the tube sleeve form a cable, the tube threading module releases the tube sleeve, and the wire-reeling module reels the cable.

[0011] In one possible design, the core sleeve is cylindrical in structure and is provided with at least two symmetrical window areas connecting the inside and the outside. Each window area is provided with a check plate. The check plate has two opposite ends, one end of which is connected to the window area and the other end is inclined and extends into the core sleeve. Adjacent check plates form a first channel for the core wire to pass through in one direction.

[0012] In a possible design, the pipe-threading module further includes a fixing unit and a control unit, wherein the fixing unit is used to form a second channel adapted to the pipe sleeve, and the excitation unit is arranged on the fixing unit and electrically connected to the control unit, and the control unit is used to control the operation of the excitation unit.

[0013] In a possible design, the excitation unit includes a solenoid, a solenoid box and a magnetic field measuring sensor, the solenoid has an inner ring and an outer ring opposite to each other, the inner ring of the solenoid is sleeved on the second channel and is coaxial with the second channel, the outer ring of the solenoid is connected to the solenoid box, the solenoid is electrically connected to the control unit, the solenoid box is connected to the fixing unit, and the magnetic field measuring sensor is arranged on the inner ring of the solenoid;

[0014] There are several solenoids and magnetic field measuring sensors respectively, and the corresponding solenoids and magnetic field measuring sensors constitute an excitation group for measuring the core sleeve position and supplying energy. Accordingly, several excitation groups are arranged in sequence along the axial direction of the second channel.

[0015] In one possible design, a three-jaw chuck is selected as the fixing unit;

[0016] The control unit includes a power supply, a magnetic field signal processor and a multi-way switch. The power supply supplies power. The multi-way switch is electrically connected to the magnetic field signal processor and the excitation group respectively. The excitation group measures the position of the core sleeve through a magnetic field measurement sensor and transmits the position signal to the magnetic field signal processor. The magnetic field signal processor controls the multi-way switch to supply power to the solenoid of the first excitation group on the side of the core wire passing through the tube to drive the core wire to move.

[0017] In a second aspect, the present invention provides a pipe threading method based on the pipe threading device, comprising the following steps:

[0018] Pipe sleeve installation: The pipe sleeve passes through all pipe threading modules in sequence. The pipe threading module fixes the pipe sleeve through a fixing unit, and the axis of the pipe sleeve coincides with the axis of the second channel of the fixing unit. The two ends of the pipe sleeve are respectively connected to the pay-off module and the take-up module;

[0019] Core sleeve installation: insert the core sleeves whose number is greater than the number of tube threading modules into the core wire and separate them at equal intervals. The distance between two adjacent core sleeves is less than half of the sum of the distance between two adjacent tube threading modules and the length of a single tube threading module. Accordingly, when threading the tube, there is at least one core sleeve in each tube threading module.

[0020] Manual pipe threading: manually thread the core wire into the pipe sleeve until a certain number of core sleeves enter the pipe threading module, and obtain traction through this part of the core sleeves to drive the core wire to move along the pipe sleeve;

[0021] Electric pipe threading: The control unit controls the positive excitation of the excitation unit to drive the core wire to thread the pipe;

[0022] Core sleeve withdrawal: The control unit controls the excitation unit to reversely excite to drive the core sleeve to withdraw;

[0023] Wire reeling: The ends of the tube sleeve and the core wire are fixed, and the wire reeling module is started to complete the wire reeling.

[0024] In a possible design, controlling the excitation of the excitation unit by the control unit includes the following steps:

[0025] When all solenoids are not powered, the magnetic fields of all magnetic field measurement sensors are measured by the magnetic field measurement processor;

[0026] Select all magnetic field measurement sensors with magnetic field signals exceeding a threshold value, and ignore magnetic field measurement sensors with isolated magnetic field signals;

[0027] Further, multiple groups of adjacent magnetic field measurement sensors with continuous magnetic field signals are selected, and among the multiple groups of magnetic field measurement sensors, pulse excitation is performed on the first excitation group on the side of the core wire passing through the pipe;

[0028] The pay-off module rotates under the traction of the core wire and pays off the wire;

[0029] After stopping the excitation, repeat the above steps until the core wire passes through the sleeve;

[0030] Correspondingly, when reverse excitation is performed, pulse excitation is performed on the first excitation group on the opposite side of the core wire's forward direction through the tube.

[0031] In a third aspect, the present invention provides a cable harness prepared by the pipe threading method.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] The distributed layout of the pipe threading modules provides distributed propulsion power, effectively replacing the end traction in the existing technology and avoiding the lack of power caused by the end traction, thus realizing the pipe threading of super-long cables. Furthermore, the pipe threading module helps to achieve modularization, thereby adjusting the length of the pipe threading processing line to adapt to the pipe threading processing requirements of cables of different lengths, breaking through the limitation of the tensile strength of the material on the pipe threading length. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0035] Figure 1 It is a structural schematic diagram of a pipe threading device;

[0036] Figure 2 Schematic diagram of the assembly of the core wire and the tube threading module when threading the core wire through the tube.

[0037] Figure 3 for Figure 2 Schematic diagram of the left side.

[0038] Figure 4 It is a schematic diagram of the structure of the core sleeve.

[0039] Figure 5 for Figure 4 Schematic diagram of the left side.

[0040] Figure 6 This is the wiring diagram of the control unit.

[0041] Figure 7 The figure is a flow chart of a pipe threading method.

[0042] Marks and corresponding parts names in the attached drawings:

[0043] 100. Pay-off module; 200. Take-up module; 300. Pipe threading module; 1. Core wire; 2. Core sleeve; 3. Pipe sleeve; 4. Fixing unit; 5. Magnetic field measuring sensor; 6. Solenoid; 7. Solenoid box; 8. Check plate; 9. Power supply; 10. Magnetic field signal processor; 11. Multi-way switching switch. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0045] The terms "first" and "second" used in the present invention are only used to distinguish the corresponding components for the sake of clarity of description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.

[0046] Embodiment 1:

[0047] A pipe threading device includes a wire-paying module 100, a wire-receiving module 200 and a plurality of pipe threading modules 300, wherein all pipe threading modules 300 are sequentially arranged between the wire-paying module 100 and the wire-receiving module 200 to form a pipe threading processing line;

[0048] The tube threading processing line is provided with a tube threading channel adapted for the core wire 1 , and each tube threading module 300 includes an excitation unit for providing energy for the core wire 1 to move along the tube threading channel.

[0049] The pipe threading device is provided with a plurality of pipe threading modules 300, and each pipe threading module 300 can provide power for the pipe threading of the core wire 1 through the excitation unit, and the distributed layout of the pipe threading modules 300 provides distributed propulsion power, effectively replacing the end traction in the prior art and avoiding the lack of power caused by the end traction, thereby realizing the pipe threading processing of super-long cables. Furthermore, the pipe threading module 300 helps to achieve modularization, and then adjust the length of the pipe threading processing line to adapt to the pipe threading processing requirements of cables of different lengths, breaking through the limitation of the tensile strength of the material on the pipe threading length.

[0050] During operation, any appropriate number of tube threading modules 300 are selected according to the required cable length, and the wire-laying module 100, the wire-receiving module 200 and the tube threading module 300 are placed according to the conditions of the processing site to form a tube threading processing line, through which the core wire 1 can be threaded.

[0051] It is easy to understand that the pay-off module 100 and the take-up module 200 can be any suitable model of commercially available equipment; according to the conditions of different processing sites, the pipe threading processing line can be constructed into any suitable length, shape, etc., and technical personnel in this field can combine the above parameters of the pipe threading processing line, thereby increasing the optional range of the pipe threading processing line and improving its practicality.

[0052] Regarding the shape of the pipe threading processing line, in a possible implementation, the pipe threading processing line is constructed as a curve or a straight line. Based on this, the curve includes but is not limited to a trigonometric function curve, an exponential function curve, a spiral line, a cycloid, and a parabola, and can also be constructed as any suitable irregular curve according to the conditions of the processing site, and can also be constructed as any other suitable line shape, and the present invention does not impose any limitation on this.

[0053] In combination with actual processing, taking the high-temperature superconducting cable pipe threading as an example, the existing traction pipe threading technology requires the high-temperature superconducting cable to be straightened, that is, completing the pipe threading of a kilometer-level cable requires a kilometer-level operation space, and the space requirement is too high. When the pipe threading device is used for pipe threading, the pipe threading processing line is constructed as a curve, which realizes the pipe threading of the cable in a coiled state, effectively reducing the space occupation and improving the flexibility and convenience of pipe threading.

[0054] Furthermore, the tube-threading module 300 provides traction force for the core wire 1 to thread the tube through the excitation unit. When the excitation unit is powered on, an induced magnetic field is formed. The core wire 1 is located in the induced magnetic field and is subjected to electromagnetic force. The electromagnetic force acts as a traction force to achieve the movement of the core wire 1. Specifically, when the tube-threading processing line is constructed as a curve, the electromagnetic force provided by the excitation unit is tangent to the tube-threading channel. Based on this, the electromagnetic force pulls the core wire 1 to move, and there is no need to worry about the traction force turning into pressure and increasing the friction resistance of the core wire 1, ensuring that the core wire 1 can be smoothly threaded.

[0055] Similarly, when the pipe threading processing line is constructed as a straight line, the electromagnetic force provided by the excitation unit is parallel to the pipe threading channel.

[0056] In a possible implementation, a core wire 1 is wound around the pay-off module 100, and one end of the core wire 1 is configured to be able to penetrate the free end of the tube-threading module 300, and the core wire 1 is made of non-magnetic conductive material, and a detachable core sleeve 2 is provided on the core wire 1, and a plurality of core sleeves 2 are provided and arranged at intervals on the core wire 1, and the core sleeve 2 is made of magnetic conductive material; a tube sleeve 3 is provided outside the core wire 1, and the tube sleeve 3 is hollow and used to penetrate the core wire 1;

[0057] Correspondingly, when the core wire 1 is passed through the tube, the tube sleeve 3 passes through and is fixed by the tube threading module 300, the core wire 1 passes through the tube sleeve 3, and the wire-releasing module 100 follows to release the wire; after the core wire 1 is completed through the tube, the core sleeve 2 is withdrawn, the core wire 1 and the tube sleeve 3 form a cable, the tube threading module 300 releases the tube sleeve 3, and the wire-reeling module 200 reels the cable.

[0058] Based on the above design scheme, the core wire 1 is made of non-magnetic materials such as REBCO composite wire, and the core sleeve 2 is made of magnetic materials such as 430 stainless steel, high magnetic permeability carbon steel coated with anti-oxidation paint, etc. The free end of the core wire 1 is manually inserted into the pipe sleeve 3. When the core sleeve 2 is located in the pipe insertion module 300, after the excitation unit is energized, the core sleeve 2 is acted upon by the electromagnetic force and drives the core wire 1 to move, thereby inserting the remaining core wire 1 into the pipe sleeve 3.

[0059] Preferably, the sleeve 3 is made of any suitable metal material, including but not limited to copper, aluminum and alloys thereof. Based on this, the metal sleeve 3 can improve the mechanical properties of the core wire 1 and maintain good consistency of the mechanical properties.

[0060] In one possible implementation, the core sleeve 2 is constructed in a cylindrical shape, and at least two window areas that are connected to the inside and outside and are symmetrical are opened on the core sleeve 2. Each window area is provided with a check plate 8. The check plate 8 has two opposite ends, one end of which is connected to the window area, and the other end is inclined and extends into the core sleeve 2. Adjacent check plates 8 form a first channel for the core wire 1 to pass through in one direction.

[0061] Based on the above design, the core sleeve 2 has a window area, which is convenient for installing the check piece 8 and for observing the working condition of the check piece 8 to adjust the tilt angle of the check piece 8. For multiple check pieces 8, a through prism-shaped structure is formed, and the through part is the first channel.

[0062] For the core wire 1, when the core sleeve 2 moves under the action of electromagnetic force, the end of the check piece 8 will abut the outer periphery of the core wire 1, and the pressing force between the check piece 8 and the core wire 1 causes the check piece 8 to rotate to a certain extent. Specifically: when the check piece 8 rotates outward, adjacent check pieces 8 move away from each other, the first channel increases, and relative movement can occur between the core wire 1 and the core sleeve 2; conversely, when the check piece 8 rotates inward, adjacent check pieces 8 close together, the first channel decreases, the core wire 1 and the core sleeve 2 contact more closely, and there is no relative movement between the two, that is, the two will be stationary or move at the same time; further, when the core sleeve 2 moves under the action of electromagnetic force, the core sleeve 2 drives the core wire 1 to move together through the check piece 8.

[0063] In conjunction with the tube insertion, the core sleeve 2 drives the core wire 1 to move together through the check piece 8 during the tube insertion; after the tube insertion, the excitation direction of the excitation unit is changed to make the core sleeve 2 move in the opposite direction, and the core wire 1 remains relatively still, so that the core sleeve 2 can be withdrawn. Based on this, the setting of the check piece 8 ensures that the core sleeve 2 can effectively drive the inner core wire 1 forward when the core wire 1 is inserted into the tube, and after the core wire 1 is inserted into the tube, the core sleeve 2 can be removed, making the tube insertion more convenient.

[0064] Furthermore, when the diameter of the core wire 1 is small, the size of the core sleeve 2 is also small. At this time, in order to ensure the structural strength of the core sleeve 2, two window areas can be opened. If the diameter of the core wire 1 is large, opening more than two window areas will not affect the structural strength of the core sleeve 2. At this time, an appropriate number of window areas can be opened as needed.

[0065] Optionally, when the core wire 1 is a REBCO composite wire, the diameter of the core wire 1 is 2-9 mm; accordingly, the inner diameter of the sleeve 3 is 3-12 mm, and the wall thickness of the sleeve 3 is 0.2-2 mm; the core sleeve 2 is a thin-walled cylinder, and a gap of 0.2-0.5 mm is maintained between the outer periphery of the core sleeve 2 and the inner wall of the sleeve 3, and the distance between the ends of the check plate 8 (that is, the distance between the end of the check plate 8 and the outer periphery of the core wire 1) is less than the diameter of the core wire 1 by 1-1.4 mm.

[0066] In a possible implementation, the pipe threading module 300 also includes a fixing unit 4 and a control unit, the fixing unit 4 is used to form a second channel adapted to the pipe sleeve 3, and the excitation unit is arranged on the fixing unit 4 and electrically connected to the control unit, and the control unit is used to control the operation of the excitation unit.

[0067] Based on the above design, the second channel is formed by the fixing unit 4 and the pipe sleeve 3 is fixed, so as to prevent the pipe sleeve 3 from being disturbed during the pipe threading of the core wire 1, thereby ensuring smooth completion of the pipe threading. The control unit is used to realize the automatic operation of the pipe threading module 300, ensure the pipe threading of the extra-long cable, and effectively reduce manual participation, making the pipe threading more convenient and quick.

[0068] In a possible implementation, the excitation unit includes a solenoid 6, a solenoid box 7 and a magnetic field measurement sensor 5, the solenoid 6 has an inner ring and an outer ring relative to each other, the inner ring of the solenoid 6 is sleeved on the second channel and is coaxial with the second channel, the outer ring of the solenoid 6 is connected to the solenoid box 7, the solenoid 6 is electrically connected to the control unit, the solenoid box 7 is connected to the fixing unit 4, and the magnetic field measurement sensor 5 is arranged on the inner ring of the solenoid 6;

[0069] There are several solenoids 6 and magnetic field measuring sensors 5 respectively, and the corresponding solenoids 6 and magnetic field measuring sensors 5 constitute an excitation group for measuring the position of the core sleeve 2 and supplying energy. Accordingly, several excitation groups are sequentially arranged along the axial direction of the second channel.

[0070] Based on the above design scheme, the solenoid 6 can be made of enameled wire, or any suitable commercially available model. Multiple solenoids 6 are placed in the solenoid box 7 in sequence to form multiple excitation groups. At the same time, each solenoid 6 is provided with a magnetic field measurement sensor 5, which is used to measure the magnetic field in the direction parallel to the axis of the second channel, and then confirm the position of the core sleeve 2, so as to accurately start the solenoid 6 for supplying energy to the core wire 1 through the tube, which not only ensures the movement of the core wire 1, but also avoids damage to the core wire 1 caused by multiple excitation groups in the same tube module 300 supplying energy to the same core sleeve 2.

[0071] It is easy to understand that the magnetic field measurement sensor 5 can be a Hall plate or any other suitable commercially available sensor. Accordingly, the residual magnetism of the core sleeve 2 is set according to the accuracy of the magnetic field measurement sensor 5 actually selected to ensure that the position information of the core sleeve 2 is accurately obtained.

[0072] At the same time, those skilled in the art can flexibly increase or decrease the number of excitation groups in a single pipe threading module 300, and the present invention does not impose any restrictions on this. Further, the pipe threading modules 300 used in the same pipe threading device preferably have the same number of excitation groups to improve the degree of modularization.

[0073] In a possible implementation, the fixing unit 4 uses two three-jaw chucks, which are respectively located at the two ends of the solenoid box 7. Based on the above design, the three-jaw chuck can not only fix the pipe sleeve 3 during the pipe threading process, but also release the pipe sleeve 3 during the wire taking-up process of the wire taking-up module 200. Further, the fixing unit 4 can also be constructed as any other suitable structure, and the present invention does not impose any limitation on this.

[0074] In a possible implementation, the control unit includes a power supply 9, a magnetic field signal processor 10 and a multi-way switch 11. The power supply 9 supplies power, and the multi-way switch 11 is electrically connected to the magnetic field signal processor 10 and the excitation group respectively. The excitation group measures the position of the core sleeve 2 through the magnetic field measurement sensor 5 and transmits the position signal to the magnetic field signal processor 10. The magnetic field signal processor 10 controls the multi-way switch 11 to supply power to the solenoid 6 of the first excitation group on the side of the core wire 1 passing through the pipe to drive the core wire 1 to move.

[0075] Based on the above design scheme, the control unit not only realizes the electric pipe threading of the core wire 1, but also accurately starts the solenoid 6 that supplies energy for the pipe threading of the core wire 1 through the position information of the core sleeve 2, thereby realizing the coordinated control of the pipe threading energy of all pipe threading modules 300, maximizing the pipe threading power, and avoiding insufficient overall power when different pipe threading modules 300 are not powered synchronously, so as to ensure the efficiency of the pipe threading of the core wire 1.

[0076] Specifically, for determining the position of the core sleeve 2, the residual magnetism of the core sleeve 2 is measured by the magnetic field measurement sensor 5, and the magnetic field signal processor 10 obtains the residual magnetism signal and processes it through the built-in program to determine the position of the core sleeve 2. For power supply, the multi-way switch 11 has multiple contacts, and the excitation groups in the excitation unit correspond to one of the contacts respectively. When one of the excitation groups needs to be excited, the magnetic field signal processor 10 issues an instruction to switch the multi-way switch 11 to the corresponding contact, so that the corresponding excitation group is energized.

[0077] It is easy to understand that the power supply 9, the magnetic field signal processor 10 and the multi-way switch 11 can be any suitable commercially available models, and the built-in program of the magnetic field signal processor 10 can be any suitable existing program, which will not be described in detail here.

[0078] Embodiment 2:

[0079] Based on Example 1, this embodiment introduces a pipe penetration method based on the pipe penetration device, and the pipe penetration method includes the following steps:

[0080] S100 Installation of the pipe sleeve 3: The pipe sleeve 3 passes through all the pipe threading modules 300 in sequence. The pipe threading module 300 fixes the pipe sleeve 3 through the fixing unit 4, and the axis of the pipe sleeve 3 coincides with the axis of the second channel of the fixing unit 4. The two ends of the pipe sleeve 3 are respectively connected to the pay-off module 100 and the take-up module 200;

[0081] S200 Core sleeve 2 installation: insert the core sleeves 2 whose number is greater than the number of tube-threading modules 300 into the core wire 1 and separate them at equal intervals, and the distance between two adjacent core sleeves 2 is less than half of the sum of the distance between two adjacent tube-threading modules 300 and the length of a single tube-threading module 300. Accordingly, when threading the tube, there is at least one core sleeve 2 in each tube-threading module 300;

[0082] S300 manual pipe threading: manually thread the core wire 1 into the pipe sleeve 3 until a certain number of core sleeves 2 enter the pipe threading module 300, and obtain a traction force capable of driving the core wire 1 to move along the pipe sleeve 3 through the core sleeves 2;

[0083] S400 electric pipe threading: The control unit controls the positive excitation of the excitation unit to drive the core wire 1 to thread the pipe;

[0084] S500 core sleeve 2 withdrawal: the control unit controls the excitation unit to reverse the excitation to drive the core sleeve 2 to withdraw;

[0085] S600 Wire reeling: The sleeve 3 is fixed to the end of the core wire 1 , the fixing unit 4 releases the sleeve 3 , and the wire reeling module 200 is started to complete the wire reeling.

[0086] Specifically, in step S200, on the basis of satisfying that the spacing is less than half of the sum of the spacing between two adjacent tube-piercing modules 300 and the length of a single tube-piercing module 300, those skilled in the art can arbitrarily adjust the specific spacing value between two adjacent core sleeves 2.

[0087] In step S300, the principle of manual pipe threading is the same as the existing traction pipe threading technology, that is, applying end traction to achieve pipe threading. When the traction force obtained by the core sleeve 2 is sufficient, step S400 can be entered to avoid the pipe threading problem caused by the existing technology.

[0088] Generally speaking, the required number of core sleeves 2 is tested in advance, and step S400 can be entered after the corresponding number of core sleeves 2 are fed in. When a temporary test is required, refer to the following steps S1-S3. If the core wire 1 moves after step S3 is implemented, it means that the traction force is sufficient, and step S400 is entered; otherwise, continue to feed in at least one core sleeve 2, and repeat steps S1-S3 until the core wire 1 can move.

[0089] In step S500, after the core sleeve 2 is withdrawn, there is no additional component between the core wire 1 and the sleeve 3, so as to facilitate subsequent processing and eliminate the gap between the core wire 1 and the sleeve 3, so that the appearance of the cable is neater and the mechanical properties are better.

[0090] Further, controlling the excitation of the excitation unit by the control unit includes the following steps:

[0091] S1, when all solenoids 6 are not powered, the magnetic field of all magnetic field measurement sensors 5 is measured by the magnetic field measurement processor;

[0092] S2, selecting all magnetic field measurement sensors 5 with magnetic field signals exceeding a threshold value, and ignoring magnetic field measurement sensors 5 with isolated magnetic field signals;

[0093] S3, selecting a plurality of adjacent magnetic field measurement sensors 5 having continuous magnetic field signals, and performing pulse excitation on the first excitation group on the side of the core wire 1 passing through the pipe among the plurality of magnetic field measurement sensors 5;

[0094] S4, the pay-off module 100 rotates under the traction of the core wire 1 and pays off the wire;

[0095] S5, after stopping the excitation, repeat the above steps until the core wire 1 passes through the sleeve 3;

[0096] Correspondingly, when reverse excitation is performed, pulse excitation is performed on the first excitation group on the opposite side of the direction in which the core wire 1 passes through the tube.

[0097] Among them, the value of the threshold magnetic field signal in step S2 can be determined by those skilled in the art according to the specific models of the selected magnetic field measurement processor and the magnetic field measurement sensor 5. Accordingly, the residual magnetism of the core sleeve 2 is set according to the set threshold magnetic field signal.

[0098] Optionally, the excitation time in step S3 is 10-50 ms, the magnetic field strength in step S3 is 0.3-2 T, and the excitation stop time in step S5 is 20-200 ms. Further, those skilled in the art can specifically set corresponding parameter values ​​according to different equipment models selected.

[0099] Embodiment 3:

[0100] This embodiment introduces a cable harness based on the embodiment 2, and the cable harness is prepared by the pipe threading method. Based on this, the cable harness is prepared by the pipe threading device described in the embodiment 1 and the pipe threading method described in the embodiment 2, so that the pipe threading length is not limited by the tensile strength of the material, and the pipe threading operation can be performed when the core wire 1 is bent, which greatly saves the pipe threading space and enables the pipe threading of long-length cables in a small space. Furthermore, the cable harness is a semi-finished cable, which is prepared into a qualified finished cable through subsequent processing.

[0101] Embodiment 4:

[0102] This embodiment provides a specific and feasible implementation plan based on embodiments 1 and 2. Specifically:

[0103] like Figure 1 As shown, a pipe threading device includes a group of pay-off modules 100, a group of take-up modules 200 and multiple groups of pipe threading modules 300, wherein 300 pipe threading modules 300 are provided and are placed in series on a curve with an interval of 0.65m, and the curve is a spiral curve with an inner diameter of 10 meters and a diameter increase of 0.2m per circle, and the pay-off module 100 and the take-up module 200 are arranged tangent to the axis of the pipe threading modules 300 at the head and tail ends; the pay-off module 100 is used to synchronously release the core wire 1 to be threaded during the pipe threading process, and the take-up module 200 is used to wind up the core wire 1 and the pipe sleeve 3 that have been threaded.

[0104] like Figure 2 and 3 As shown, a detachable core sleeve 2 is provided on the core wire 1, and a tube sleeve 3 is provided outside the core wire 1. The tube insertion module 300 includes a fixing unit 4 and an excitation unit, and the fixing unit 4 is constructed as two three-jaw chucks respectively arranged at both ends of the excitation unit, and a tube sleeve 3 passing through the excitation unit is fixed on the three-jaw chuck, and the excitation unit includes a solenoid 6, a solenoid box 7 and a magnetic field measurement sensor 5, and a plurality of solenoids 6 and magnetic field measurement sensors 5 are provided respectively, and the corresponding solenoids 6 and magnetic field measurement sensors 5 constitute an excitation group.

[0105] For the core wire 1, a REBCO composite wire with a diameter of 3.2 mm is selected. Figure 4 and 5 As shown, the core sleeve 2 is made of high magnetic permeability carbon steel coated with anti-oxidation paint, with an inner diameter of 3.2+0.1mm, an outer diameter of 5.7mm, and a length of 10mm. The window area is located in the middle of the core sleeve 2 and has a length of 5mm. The end spacing of the check piece 8 is less than the diameter of the core wire 1 by 1.4mm, and the initial remanence of the core sleeve 2 is greater than 200Gs. The pipe sleeve 3 is made of a copper tube with an inner diameter of 6mm, a wall thickness of 1mm, and a length of 500m.

[0106] The solenoid 6 is wound by enameled wire, with an inner diameter of 10 mm, a wall thickness of 10 mm, and a height of 10 mm. 100 solenoids 6 are coaxially stacked and fixed in the solenoid box 7, and the solenoid box 7 is an acrylic box. The fixing unit 4 is a three-jaw chuck of epoxy glass fiber board, which is installed at both ends of the solenoid box 7. The fixing unit 4 is used to fix the sleeve 3 so that the sleeve 3 is coaxial with the solenoid 6. The magnetic field measurement sensor 5 uses a Hall plate and is fixed at the center of the inner wall of the corresponding solenoid 6. It is used to measure the magnetic field in the direction parallel to the axis of the second channel, and the measurement sensitivity is better than 1Gs.

[0107] like Figure 6 As shown, the control unit includes a power supply 9, a magnetic field signal processor 10 and a multi-way switch 11. The power supply 9 uses a 10V / 50A coil power supply, and the multi-way switch 11 uses a 100-way switch. Accordingly, 100 solenoids 6 and magnetic field measurement sensors 5 are provided. The coil power supply provides excitation current to up to 3 solenoids 6 at the same time. The magnetic field signal processor 10 traverses all Hall plate magnetic field signals with a frequency higher than 100Hz.

[0108] A specific implementation case of a pipe threading method is as follows:

[0109] Step 1: Manually pass the pipe sleeve 3 through all the pipe threading modules 300 in sequence and fix it on the fixing unit 4 of each pipe threading module 300. The axis of the pipe sleeve 3 coincides with the axis of the second channel. The head and tail ends of the pipe sleeve 3 are fixedly connected to the pay-out module 100 and the take-up module 200 respectively.

[0110] Step 2: Insert 600 core sleeves 2 tightly into the front end of the core wire 1, with the distance between two adjacent core sleeves 2 being 0.8m.

[0111] Step 3: Manually insert the core wire 1 into the pipe sleeve 3 until the number of iron cores located inside the pipe insertion module 300 reaches 10, and then start the electric pipe insertion mode.

[0112] Step 4: When all the solenoids 6 are not powered, the magnetic field on the Hall plates in all the tube-penetrating modules 300 is measured by the magnetic field signal processor 10 .

[0113] Step 5: Select all Hall plates with magnetic field signals exceeding 1Gs, ignore the Hall plates with isolated magnetic field signals, and further select multiple groups of adjacent Hall plates with continuous magnetic field signals. Pulse excitation is performed on the solenoid 6 where the Hall plates on the forward direction side of the pipe are located in the above multiple groups of Hall plates. The excitation time is 20ms and the magnetic field is 0.8T. The pay-off module 100 rotates slowly under the traction of the core wire 1 to pay-off the wire.

[0114] Step 6: After stopping the excitation for 50ms, repeat steps 4 to 6 until the core wire 1 passes through the end portion of the sleeve 3 on the forward direction.

[0115] Step 7: Pulse excitation is performed on the solenoid 6 where the Hall plate on the opposite side of the tube is located in the above-mentioned multiple groups of Hall plates, and steps 4 to 6 are repeated until all the core sleeves 2 are withdrawn and the tube insertion is completed.

[0116] Step 8: Bind the sleeve 3 to the end of the core wire 1, and rotate the wire-receiving module 200 until the wire-receiving is completed.

[0117] Among them, steps four to six are the steps of controlling the excitation of the excitation unit by the control unit as described in Example 2.

[0118] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe threading device, characterized in that: It comprises a wire-releasing module (100), a wire-receiving module (200) and a plurality of pipe-threading modules (300), wherein all the pipe-threading modules (300) are sequentially arranged between the wire-releasing module (100) and the wire-receiving module (200) to form a pipe-threading processing line; The pipe threading processing line is provided with a pipe threading channel adapted for the core wire (1), and each pipe threading module (300) comprises an excitation unit for supplying energy for the core wire (1) to move along the pipe threading channel.

2. The pipe threading device according to claim 1, characterized in that: The pipe threading processing line is constructed as a curve or a straight line. Accordingly, when the pipe threading processing line is constructed as a curve, the electromagnetic force provided by the excitation unit is tangent to the pipe threading channel. When the pipe threading processing line is constructed as a straight line, the electromagnetic force provided by the excitation unit is parallel to the pipe threading channel.

3. The pipe threading device according to claim 1, characterized in that: A core wire (1) is wound around the wire-releasing module (100), and one end of the core wire (1) is configured to be able to be inserted into the free end of the tube-threading module (300), and the core wire (1) is made of non-magnetic conductive material. A detachable core sleeve (2) is provided on the core wire (1), and a plurality of core sleeves (2) are provided and arranged on the core wire (1) at intervals, and the core sleeves (2) are made of magnetic conductive material; a tube sleeve (3) is provided outside the core wire (1), and the tube sleeve (3) is hollow and used for inserting the core wire (1); Correspondingly, when the core wire (1) is threaded through the tube, the tube sleeve (3) passes through and is fixed by the tube threading module (300), the core wire (1) is threaded into the tube sleeve (3), and the wire release module (100) follows to release the wire; after the core wire (1) is threaded through the tube, the core sleeve (2) is withdrawn, the core wire (1) and the tube sleeve (3) form a cable, the tube threading module (300) releases the tube sleeve (3), and the wire rewinding module (200) rewinds the cable.

4. The pipe threading device according to claim 3, characterized in that: The core sleeve (2) is cylindrical in structure, and is provided with at least two symmetrical window areas which are connected to the inside and outside, and each window area is provided with a check plate (8), and the check plate (8) has two opposite ends, one end of which is connected to the window area, and the other end is inclined and extends into the core sleeve (2), and adjacent check plates (8) form a first channel for the core wire (1) to pass through in one direction.

5. The pipe threading device according to claim 3, characterized in that: The pipe-threading module (300) further comprises a fixing unit (4) and a control unit, wherein the fixing unit (4) is used to form a second channel adapted to the pipe sleeve (3), and the excitation unit is arranged on the fixing unit (4) and is electrically connected to the control unit, and the control unit is used to control the operation of the excitation unit.

6. The pipe threading device according to claim 5, characterized in that: The excitation unit comprises a solenoid (6), a solenoid box (7) and a magnetic field measuring sensor (5); the solenoid (6) has an inner ring and an outer ring which are opposite to each other; the inner ring of the solenoid (6) is sleeved on the second channel and is coaxial with the second channel; the outer ring of the solenoid (6) is connected to the solenoid box (7); the solenoid (6) is electrically connected to a control unit; the solenoid box (7) is connected to a fixing unit (4); and the magnetic field measuring sensor (5) is arranged on the inner ring of the solenoid (6); A plurality of solenoids (6) and magnetic field measuring sensors (5) are provided respectively, and the corresponding solenoids (6) and magnetic field measuring sensors (5) constitute an excitation group for measuring the position of the core sleeve (2) and supplying energy. Accordingly, the plurality of excitation groups are arranged in sequence along the axial direction of the second channel.

7. The pipe threading device according to claim 6, characterized in that: The fixing unit (4) uses a three-jaw chuck; The control unit comprises a power supply (9), a magnetic field signal processor (10) and a multi-way switch (11), wherein the power supply (9) supplies power, and the multi-way switch (11) is electrically connected to the magnetic field signal processor (10) and the excitation group respectively, wherein the excitation group measures the position of the core sleeve (2) through a magnetic field measurement sensor (5) and transmits a position signal to the magnetic field signal processor (10), and the magnetic field signal processor (10) controls the multi-way switch (11) to supply power to the solenoid (6) of the first excitation group on the side of the core wire (1) passing through the tube, so as to drive the core wire (1) to move.

8. A pipe threading method based on the pipe threading device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Installation of the pipe sleeve (3): the pipe sleeve (3) passes through all the pipe threading modules (300) in sequence, the pipe threading module (300) fixes the pipe sleeve (3) through the fixing unit (4), and the axis of the pipe sleeve (3) coincides with the axis of the second channel of the fixing unit (4), and the two ends of the pipe sleeve (3) are respectively connected to the wire release module (100) and the wire take-up module (200); Installation of the core sleeves (2): inserting core sleeves (2) whose number is greater than the number of pipe threading modules (300) into the core wire (1) and separating them at equal intervals, wherein the distance between two adjacent core sleeves (2) is less than half of the sum of the distance between two adjacent pipe threading modules (300) and the length of a single pipe threading module (300); accordingly, when threading the pipe, at least one core sleeve (2) exists in each pipe threading module (300); Manual pipe threading: manually threading the core wire (1) into the pipe sleeve (3) until a certain number of core sleeves (2) enter the pipe threading module (300), and a traction force capable of driving the core wire (1) to move along the pipe sleeve (3) is obtained through the core sleeves (2); Electric pipe threading: The control unit controls the excitation unit to positively excite, so as to drive the core wire (1) to thread the pipe; The core sleeve (2) is withdrawn: the excitation unit is controlled by the control unit to reversely excite, so as to drive the core sleeve (2) to withdraw; Wire collection: The pipe sleeve (3) is fixed to the end of the core wire (1), and the wire collection module (200) is started to complete the wire collection.

9. The pipe threading method according to claim 8, characterized in that: Controlling the excitation of the excitation unit by the control unit includes the following steps: When all the solenoids (6) are not powered, the magnetic fields of all the magnetic field measurement sensors (5) are measured by a magnetic field measurement processor; Selecting all magnetic field measurement sensors (5) with magnetic field signals exceeding a threshold value, and ignoring magnetic field measurement sensors (5) with isolated magnetic field signals; Further, a plurality of groups of adjacent magnetic field measurement sensors (5) having continuous magnetic field signals are selected, and among the plurality of groups of magnetic field measurement sensors (5), pulse excitation is performed on the first excitation group on the side of the core wire (1) passing through the pipe; The wire-releasing module (100) rotates under the traction of the core wire (1) and releases the wire accordingly; After stopping the excitation, repeat the above steps until the core wire (1) passes through the sleeve (3); Correspondingly, the magnetic field directions of the forward excitation and the reverse excitation are opposite, and when reverse excitation is performed, pulse excitation is performed on the first excitation group on the opposite side of the core wire (1) passing through the pipe.

10. A cable harness, characterized in that: It is prepared by the pipe threading method described in claim 8 or 9.

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